diff options
| -rw-r--r-- | src/H5C.c | 9064 |
1 files changed, 4539 insertions, 4525 deletions
@@ -3566,575 +3566,575 @@ done: #if H5C_DO_EXTREME_SANITY_CHECKS if ((H5C_validate_protected_entry_list(cache_ptr) < 0) || - (H5C_validate_pinned_entry_list(cache_ptr) < 0) || (H5C_validate_lru_list(cache_ptr) < 0)) { + (H5C_validate_pinned_entry_list(cache_ptr) < 0) || (H5C_validate_lru_list(cache_ptr) < 0)) HDONE_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "an extreme sanity check failed on exit") #endif /* H5C_DO_EXTREME_SANITY_CHECKS */ - FUNC_LEAVE_NOAPI(ret_value) + FUNC_LEAVE_NOAPI(ret_value) - } /* H5C_unprotect() */ +} /* H5C_unprotect() */ - /*------------------------------------------------------------------------- - * - * Function: H5C_unsettle_entry_ring - * - * Purpose: Advise the metadata cache that the specified entry's free space - * manager ring is no longer settled (if it was on entry). - * - * If the target free space manager ring is already - * unsettled, do nothing, and return SUCCEED. - * - * If the target free space manager ring is settled, and - * we are not in the process of a file shutdown, mark - * the ring as unsettled, and return SUCCEED. - * - * If the target free space manager is settled, and we - * are in the process of a file shutdown, post an error - * message, and return FAIL. - * - * Return: Non-negative on success/Negative on failure - * - * Programmer: Quincey Koziol - * January 3, 2017 - * - *------------------------------------------------------------------------- - */ - herr_t H5C_unsettle_entry_ring(void *_entry) - { - H5C_cache_entry_t *entry = (H5C_cache_entry_t *)_entry; /* Entry whose ring to unsettle */ - H5C_t *cache; /* Cache for file */ - herr_t ret_value = SUCCEED; /* Return value */ +/*------------------------------------------------------------------------- + * + * Function: H5C_unsettle_entry_ring + * + * Purpose: Advise the metadata cache that the specified entry's free space + * manager ring is no longer settled (if it was on entry). + * + * If the target free space manager ring is already + * unsettled, do nothing, and return SUCCEED. + * + * If the target free space manager ring is settled, and + * we are not in the process of a file shutdown, mark + * the ring as unsettled, and return SUCCEED. + * + * If the target free space manager is settled, and we + * are in the process of a file shutdown, post an error + * message, and return FAIL. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Quincey Koziol + * January 3, 2017 + * + *------------------------------------------------------------------------- + */ +herr_t +H5C_unsettle_entry_ring(void *_entry) +{ + H5C_cache_entry_t *entry = (H5C_cache_entry_t *)_entry; /* Entry whose ring to unsettle */ + H5C_t *cache; /* Cache for file */ + herr_t ret_value = SUCCEED; /* Return value */ - FUNC_ENTER_NOAPI(FAIL) + FUNC_ENTER_NOAPI(FAIL) - /* Sanity checks */ - HDassert(entry); - HDassert(entry->ring != H5C_RING_UNDEFINED); - HDassert((H5C_RING_USER == entry->ring) || (H5C_RING_RDFSM == entry->ring) || - (H5C_RING_MDFSM == entry->ring)); - cache = entry->cache_ptr; - HDassert(cache); - HDassert(cache->magic == H5C__H5C_T_MAGIC); - - switch (entry->ring) { - case H5C_RING_USER: - /* Do nothing */ - break; + /* Sanity checks */ + HDassert(entry); + HDassert(entry->ring != H5C_RING_UNDEFINED); + HDassert((H5C_RING_USER == entry->ring) || (H5C_RING_RDFSM == entry->ring) || + (H5C_RING_MDFSM == entry->ring)); + cache = entry->cache_ptr; + HDassert(cache); + HDassert(cache->magic == H5C__H5C_T_MAGIC); + + switch (entry->ring) { + case H5C_RING_USER: + /* Do nothing */ + break; - case H5C_RING_RDFSM: - if (cache->rdfsm_settled) { - if (cache->flush_in_progress || cache->close_warning_received) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unexpected rdfsm ring unsettle") - cache->rdfsm_settled = FALSE; - } /* end if */ - break; + case H5C_RING_RDFSM: + if (cache->rdfsm_settled) { + if (cache->flush_in_progress || cache->close_warning_received) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unexpected rdfsm ring unsettle") + cache->rdfsm_settled = FALSE; + } /* end if */ + break; - case H5C_RING_MDFSM: - if (cache->mdfsm_settled) { - if (cache->flush_in_progress || cache->close_warning_received) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unexpected mdfsm ring unsettle") - cache->mdfsm_settled = FALSE; - } /* end if */ - break; + case H5C_RING_MDFSM: + if (cache->mdfsm_settled) { + if (cache->flush_in_progress || cache->close_warning_received) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unexpected mdfsm ring unsettle") + cache->mdfsm_settled = FALSE; + } /* end if */ + break; - default: - HDassert(FALSE); /* this should be un-reachable */ - break; - } /* end switch */ + default: + HDassert(FALSE); /* this should be un-reachable */ + break; + } /* end switch */ done: - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C_unsettle_entry_ring() */ - - /*------------------------------------------------------------------------- - * Function: H5C_unsettle_ring() - * - * Purpose: Advise the metadata cache that the specified free space - * manager ring is no longer settled (if it was on entry). - * - * If the target free space manager ring is already - * unsettled, do nothing, and return SUCCEED. - * - * If the target free space manager ring is settled, and - * we are not in the process of a file shutdown, mark - * the ring as unsettled, and return SUCCEED. - * - * If the target free space manager is settled, and we - * are in the process of a file shutdown, post an error - * message, and return FAIL. - * - * Return: Non-negative on success/Negative on failure - * - * Programmer: John Mainzer - * 10/15/16 - * - *------------------------------------------------------------------------- - */ - herr_t H5C_unsettle_ring(H5F_t * f, H5C_ring_t ring) - { - H5C_t *cache_ptr; - herr_t ret_value = SUCCEED; /* Return value */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C_unsettle_entry_ring() */ - FUNC_ENTER_NOAPI(FAIL) +/*------------------------------------------------------------------------- + * Function: H5C_unsettle_ring() + * + * Purpose: Advise the metadata cache that the specified free space + * manager ring is no longer settled (if it was on entry). + * + * If the target free space manager ring is already + * unsettled, do nothing, and return SUCCEED. + * + * If the target free space manager ring is settled, and + * we are not in the process of a file shutdown, mark + * the ring as unsettled, and return SUCCEED. + * + * If the target free space manager is settled, and we + * are in the process of a file shutdown, post an error + * message, and return FAIL. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: John Mainzer + * 10/15/16 + * + *------------------------------------------------------------------------- + */ +herr_t +H5C_unsettle_ring(H5F_t *f, H5C_ring_t ring) +{ + H5C_t *cache_ptr; + herr_t ret_value = SUCCEED; /* Return value */ - /* Sanity checks */ - HDassert(f); - HDassert(f->shared); - HDassert(f->shared->cache); - HDassert((H5C_RING_RDFSM == ring) || (H5C_RING_MDFSM == ring)); - cache_ptr = f->shared->cache; - HDassert(H5C__H5C_T_MAGIC == cache_ptr->magic); + FUNC_ENTER_NOAPI(FAIL) - switch (ring) { - case H5C_RING_RDFSM: - if (cache_ptr->rdfsm_settled) { - if (cache_ptr->close_warning_received) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unexpected rdfsm ring unsettle") - cache_ptr->rdfsm_settled = FALSE; - } /* end if */ - break; + /* Sanity checks */ + HDassert(f); + HDassert(f->shared); + HDassert(f->shared->cache); + HDassert((H5C_RING_RDFSM == ring) || (H5C_RING_MDFSM == ring)); + cache_ptr = f->shared->cache; + HDassert(H5C__H5C_T_MAGIC == cache_ptr->magic); + + switch (ring) { + case H5C_RING_RDFSM: + if (cache_ptr->rdfsm_settled) { + if (cache_ptr->close_warning_received) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unexpected rdfsm ring unsettle") + cache_ptr->rdfsm_settled = FALSE; + } /* end if */ + break; - case H5C_RING_MDFSM: - if (cache_ptr->mdfsm_settled) { - if (cache_ptr->close_warning_received) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unexpected mdfsm ring unsettle") - cache_ptr->mdfsm_settled = FALSE; - } /* end if */ - break; + case H5C_RING_MDFSM: + if (cache_ptr->mdfsm_settled) { + if (cache_ptr->close_warning_received) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unexpected mdfsm ring unsettle") + cache_ptr->mdfsm_settled = FALSE; + } /* end if */ + break; - default: - HDassert(FALSE); /* this should be un-reachable */ - break; - } /* end switch */ + default: + HDassert(FALSE); /* this should be un-reachable */ + break; + } /* end switch */ done: - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C_unsettle_ring() */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C_unsettle_ring() */ - /*------------------------------------------------------------------------- - * Function: H5C_validate_resize_config() - * - * Purpose: Run a sanity check on the specified sections of the - * provided instance of struct H5C_auto_size_ctl_t. - * - * Do nothing and return SUCCEED if no errors are detected, - * and flag an error and return FAIL otherwise. - * - * Return: Non-negative on success/Negative on failure - * - * Programmer: John Mainzer - * 3/23/05 - * - *------------------------------------------------------------------------- - */ - herr_t H5C_validate_resize_config(H5C_auto_size_ctl_t * config_ptr, unsigned int tests) - { - herr_t ret_value = SUCCEED; /* Return value */ +/*------------------------------------------------------------------------- + * Function: H5C_validate_resize_config() + * + * Purpose: Run a sanity check on the specified sections of the + * provided instance of struct H5C_auto_size_ctl_t. + * + * Do nothing and return SUCCEED if no errors are detected, + * and flag an error and return FAIL otherwise. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: John Mainzer + * 3/23/05 + * + *------------------------------------------------------------------------- + */ +herr_t +H5C_validate_resize_config(H5C_auto_size_ctl_t *config_ptr, unsigned int tests) +{ + herr_t ret_value = SUCCEED; /* Return value */ - FUNC_ENTER_NOAPI(FAIL) + FUNC_ENTER_NOAPI(FAIL) - if (config_ptr == NULL) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "NULL config_ptr on entry") + if (config_ptr == NULL) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "NULL config_ptr on entry") - if (config_ptr->version != H5C__CURR_AUTO_SIZE_CTL_VER) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Unknown config version") + if (config_ptr->version != H5C__CURR_AUTO_SIZE_CTL_VER) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Unknown config version") - if ((tests & H5C_RESIZE_CFG__VALIDATE_GENERAL) != 0) { + if ((tests & H5C_RESIZE_CFG__VALIDATE_GENERAL) != 0) { - if (config_ptr->max_size > H5C__MAX_MAX_CACHE_SIZE) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "max_size too big") + if (config_ptr->max_size > H5C__MAX_MAX_CACHE_SIZE) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "max_size too big") - if (config_ptr->min_size < H5C__MIN_MAX_CACHE_SIZE) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "min_size too small") + if (config_ptr->min_size < H5C__MIN_MAX_CACHE_SIZE) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "min_size too small") - if (config_ptr->min_size > config_ptr->max_size) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "min_size > max_size") + if (config_ptr->min_size > config_ptr->max_size) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "min_size > max_size") - if (config_ptr->set_initial_size && ((config_ptr->initial_size < config_ptr->min_size) || - (config_ptr->initial_size > config_ptr->max_size))) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, - "initial_size must be in the interval [min_size, max_size]") + if (config_ptr->set_initial_size && ((config_ptr->initial_size < config_ptr->min_size) || + (config_ptr->initial_size > config_ptr->max_size))) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, + "initial_size must be in the interval [min_size, max_size]") - if ((config_ptr->min_clean_fraction < 0.0) || (config_ptr->min_clean_fraction > 1.0)) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, - "min_clean_fraction must be in the interval [0.0, 1.0]") + if ((config_ptr->min_clean_fraction < 0.0) || (config_ptr->min_clean_fraction > 1.0)) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "min_clean_fraction must be in the interval [0.0, 1.0]") - if (config_ptr->epoch_length < H5C__MIN_AR_EPOCH_LENGTH) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "epoch_length too small") + if (config_ptr->epoch_length < H5C__MIN_AR_EPOCH_LENGTH) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "epoch_length too small") - if (config_ptr->epoch_length > H5C__MAX_AR_EPOCH_LENGTH) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "epoch_length too big") - } /* H5C_RESIZE_CFG__VALIDATE_GENERAL */ + if (config_ptr->epoch_length > H5C__MAX_AR_EPOCH_LENGTH) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "epoch_length too big") + } /* H5C_RESIZE_CFG__VALIDATE_GENERAL */ - if ((tests & H5C_RESIZE_CFG__VALIDATE_INCREMENT) != 0) { - if ((config_ptr->incr_mode != H5C_incr__off) && (config_ptr->incr_mode != H5C_incr__threshold)) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Invalid incr_mode") + if ((tests & H5C_RESIZE_CFG__VALIDATE_INCREMENT) != 0) { + if ((config_ptr->incr_mode != H5C_incr__off) && (config_ptr->incr_mode != H5C_incr__threshold)) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Invalid incr_mode") - if (config_ptr->incr_mode == H5C_incr__threshold) { - if ((config_ptr->lower_hr_threshold < 0.0) || (config_ptr->lower_hr_threshold > 1.0)) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, - "lower_hr_threshold must be in the range [0.0, 1.0]") + if (config_ptr->incr_mode == H5C_incr__threshold) { + if ((config_ptr->lower_hr_threshold < 0.0) || (config_ptr->lower_hr_threshold > 1.0)) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, + "lower_hr_threshold must be in the range [0.0, 1.0]") - if (config_ptr->increment < 1.0) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, - "increment must be greater than or equal to 1.0") + if (config_ptr->increment < 1.0) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "increment must be greater than or equal to 1.0") - /* no need to check max_increment, as it is a size_t, - * and thus must be non-negative. - */ - } /* H5C_incr__threshold */ + /* no need to check max_increment, as it is a size_t, + * and thus must be non-negative. + */ + } /* H5C_incr__threshold */ - switch (config_ptr->flash_incr_mode) { - case H5C_flash_incr__off: - /* nothing to do here */ - break; + switch (config_ptr->flash_incr_mode) { + case H5C_flash_incr__off: + /* nothing to do here */ + break; - case H5C_flash_incr__add_space: - if ((config_ptr->flash_multiple < 0.1) || (config_ptr->flash_multiple > 10.0)) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, - "flash_multiple must be in the range [0.1, 10.0]") - if ((config_ptr->flash_threshold < 0.1) || (config_ptr->flash_threshold > 1.0)) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, - "flash_threshold must be in the range [0.1, 1.0]") - break; + case H5C_flash_incr__add_space: + if ((config_ptr->flash_multiple < 0.1) || (config_ptr->flash_multiple > 10.0)) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, + "flash_multiple must be in the range [0.1, 10.0]") + if ((config_ptr->flash_threshold < 0.1) || (config_ptr->flash_threshold > 1.0)) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, + "flash_threshold must be in the range [0.1, 1.0]") + break; - default: - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Invalid flash_incr_mode") - break; - } /* end switch */ - } /* H5C_RESIZE_CFG__VALIDATE_INCREMENT */ + default: + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Invalid flash_incr_mode") + break; + } /* end switch */ + } /* H5C_RESIZE_CFG__VALIDATE_INCREMENT */ - if ((tests & H5C_RESIZE_CFG__VALIDATE_DECREMENT) != 0) { + if ((tests & H5C_RESIZE_CFG__VALIDATE_DECREMENT) != 0) { - if ((config_ptr->decr_mode != H5C_decr__off) && (config_ptr->decr_mode != H5C_decr__threshold) && - (config_ptr->decr_mode != H5C_decr__age_out) && - (config_ptr->decr_mode != H5C_decr__age_out_with_threshold)) { + if ((config_ptr->decr_mode != H5C_decr__off) && (config_ptr->decr_mode != H5C_decr__threshold) && + (config_ptr->decr_mode != H5C_decr__age_out) && + (config_ptr->decr_mode != H5C_decr__age_out_with_threshold)) { - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Invalid decr_mode") - } + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Invalid decr_mode") + } - if (config_ptr->decr_mode == H5C_decr__threshold) { - if (config_ptr->upper_hr_threshold > 1.0) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "upper_hr_threshold must be <= 1.0") + if (config_ptr->decr_mode == H5C_decr__threshold) { + if (config_ptr->upper_hr_threshold > 1.0) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "upper_hr_threshold must be <= 1.0") - if ((config_ptr->decrement > 1.0) || (config_ptr->decrement < 0.0)) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "decrement must be in the interval [0.0, 1.0]") + if ((config_ptr->decrement > 1.0) || (config_ptr->decrement < 0.0)) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "decrement must be in the interval [0.0, 1.0]") - /* no need to check max_decrement as it is a size_t - * and thus must be non-negative. - */ - } /* H5C_decr__threshold */ + /* no need to check max_decrement as it is a size_t + * and thus must be non-negative. + */ + } /* H5C_decr__threshold */ - if ((config_ptr->decr_mode == H5C_decr__age_out) || - (config_ptr->decr_mode == H5C_decr__age_out_with_threshold)) { + if ((config_ptr->decr_mode == H5C_decr__age_out) || + (config_ptr->decr_mode == H5C_decr__age_out_with_threshold)) { - if (config_ptr->epochs_before_eviction < 1) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "epochs_before_eviction must be positive") - if (config_ptr->epochs_before_eviction > H5C__MAX_EPOCH_MARKERS) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "epochs_before_eviction too big") + if (config_ptr->epochs_before_eviction < 1) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "epochs_before_eviction must be positive") + if (config_ptr->epochs_before_eviction > H5C__MAX_EPOCH_MARKERS) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "epochs_before_eviction too big") - if ((config_ptr->apply_empty_reserve) && - ((config_ptr->empty_reserve > 1.0) || (config_ptr->empty_reserve < 0.0))) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, - "empty_reserve must be in the interval [0.0, 1.0]") + if ((config_ptr->apply_empty_reserve) && + ((config_ptr->empty_reserve > 1.0) || (config_ptr->empty_reserve < 0.0))) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "empty_reserve must be in the interval [0.0, 1.0]") - /* no need to check max_decrement as it is a size_t - * and thus must be non-negative. - */ - } /* H5C_decr__age_out || H5C_decr__age_out_with_threshold */ + /* no need to check max_decrement as it is a size_t + * and thus must be non-negative. + */ + } /* H5C_decr__age_out || H5C_decr__age_out_with_threshold */ - if (config_ptr->decr_mode == H5C_decr__age_out_with_threshold) { - if ((config_ptr->upper_hr_threshold > 1.0) || (config_ptr->upper_hr_threshold < 0.0)) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, - "upper_hr_threshold must be in the interval [0.0, 1.0]") - } /* H5C_decr__age_out_with_threshold */ - } /* H5C_RESIZE_CFG__VALIDATE_DECREMENT */ - - if ((tests & H5C_RESIZE_CFG__VALIDATE_INTERACTIONS) != 0) { - if ((config_ptr->incr_mode == H5C_incr__threshold) && - ((config_ptr->decr_mode == H5C_decr__threshold) || - (config_ptr->decr_mode == H5C_decr__age_out_with_threshold)) && - (config_ptr->lower_hr_threshold >= config_ptr->upper_hr_threshold)) - HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "conflicting threshold fields in config") - } /* H5C_RESIZE_CFG__VALIDATE_INTERACTIONS */ + if (config_ptr->decr_mode == H5C_decr__age_out_with_threshold) { + if ((config_ptr->upper_hr_threshold > 1.0) || (config_ptr->upper_hr_threshold < 0.0)) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, + "upper_hr_threshold must be in the interval [0.0, 1.0]") + } /* H5C_decr__age_out_with_threshold */ + } /* H5C_RESIZE_CFG__VALIDATE_DECREMENT */ + + if ((tests & H5C_RESIZE_CFG__VALIDATE_INTERACTIONS) != 0) { + if ((config_ptr->incr_mode == H5C_incr__threshold) && + ((config_ptr->decr_mode == H5C_decr__threshold) || + (config_ptr->decr_mode == H5C_decr__age_out_with_threshold)) && + (config_ptr->lower_hr_threshold >= config_ptr->upper_hr_threshold)) + HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "conflicting threshold fields in config") + } /* H5C_RESIZE_CFG__VALIDATE_INTERACTIONS */ done: - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C_validate_resize_config() */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C_validate_resize_config() */ - /*------------------------------------------------------------------------- - * Function: H5C_create_flush_dependency() - * - * Purpose: Initiates a parent<->child entry flush dependency. The parent - * entry must be pinned or protected at the time of call, and must - * have all dependencies removed before the cache can shut down. - * - * Note: Flush dependencies in the cache indicate that a child entry - * must be flushed to the file before its parent. (This is - * currently used to implement Single-Writer/Multiple-Reader (SWMR) - * I/O access for data structures in the file). - * - * Creating a flush dependency between two entries will also pin - * the parent entry. - * - * Return: Non-negative on success/Negative on failure - * - * Programmer: Quincey Koziol - * 3/05/09 - * - *------------------------------------------------------------------------- - */ - herr_t H5C_create_flush_dependency(void *parent_thing, void *child_thing) - { - H5C_t *cache_ptr; - H5C_cache_entry_t *parent_entry = (H5C_cache_entry_t *)parent_thing; /* Ptr to parent thing's entry */ - H5C_cache_entry_t *child_entry = (H5C_cache_entry_t *)child_thing; /* Ptr to child thing's entry */ - herr_t ret_value = SUCCEED; /* Return value */ +/*------------------------------------------------------------------------- + * Function: H5C_create_flush_dependency() + * + * Purpose: Initiates a parent<->child entry flush dependency. The parent + * entry must be pinned or protected at the time of call, and must + * have all dependencies removed before the cache can shut down. + * + * Note: Flush dependencies in the cache indicate that a child entry + * must be flushed to the file before its parent. (This is + * currently used to implement Single-Writer/Multiple-Reader (SWMR) + * I/O access for data structures in the file). + * + * Creating a flush dependency between two entries will also pin + * the parent entry. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Quincey Koziol + * 3/05/09 + * + *------------------------------------------------------------------------- + */ +herr_t +H5C_create_flush_dependency(void *parent_thing, void *child_thing) +{ + H5C_t *cache_ptr; + H5C_cache_entry_t *parent_entry = (H5C_cache_entry_t *)parent_thing; /* Ptr to parent thing's entry */ + H5C_cache_entry_t *child_entry = (H5C_cache_entry_t *)child_thing; /* Ptr to child thing's entry */ + herr_t ret_value = SUCCEED; /* Return value */ - FUNC_ENTER_NOAPI(FAIL) + FUNC_ENTER_NOAPI(FAIL) - /* Sanity checks */ - HDassert(parent_entry); - HDassert(parent_entry->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(H5F_addr_defined(parent_entry->addr)); - HDassert(child_entry); - HDassert(child_entry->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(H5F_addr_defined(child_entry->addr)); - cache_ptr = parent_entry->cache_ptr; - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - HDassert(cache_ptr == child_entry->cache_ptr); + /* Sanity checks */ + HDassert(parent_entry); + HDassert(parent_entry->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(H5F_addr_defined(parent_entry->addr)); + HDassert(child_entry); + HDassert(child_entry->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(H5F_addr_defined(child_entry->addr)); + cache_ptr = parent_entry->cache_ptr; + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(cache_ptr == child_entry->cache_ptr); #ifndef NDEBUG - /* Make sure the parent is not already a parent */ - { - unsigned u; + /* Make sure the parent is not already a parent */ + { + unsigned u; - for (u = 0; u < child_entry->flush_dep_nparents; u++) - HDassert(child_entry->flush_dep_parent[u] != parent_entry); - } /* end block */ -#endif /* NDEBUG */ + for (u = 0; u < child_entry->flush_dep_nparents; u++) + HDassert(child_entry->flush_dep_parent[u] != parent_entry); + } /* end block */ +#endif /* NDEBUG */ - /* More sanity checks */ - if (child_entry == parent_entry) - HGOTO_ERROR(H5E_CACHE, H5E_CANTDEPEND, FAIL, - "Child entry flush dependency parent can't be itself") - if (!(parent_entry->is_protected || parent_entry->is_pinned)) - HGOTO_ERROR(H5E_CACHE, H5E_CANTDEPEND, FAIL, "Parent entry isn't pinned or protected") + /* More sanity checks */ + if (child_entry == parent_entry) + HGOTO_ERROR(H5E_CACHE, H5E_CANTDEPEND, FAIL, "Child entry flush dependency parent can't be itself") + if (!(parent_entry->is_protected || parent_entry->is_pinned)) + HGOTO_ERROR(H5E_CACHE, H5E_CANTDEPEND, FAIL, "Parent entry isn't pinned or protected") - /* Check for parent not pinned */ - if (!parent_entry->is_pinned) { - /* Sanity check */ - HDassert(parent_entry->flush_dep_nchildren == 0); - HDassert(!parent_entry->pinned_from_client); - HDassert(!parent_entry->pinned_from_cache); + /* Check for parent not pinned */ + if (!parent_entry->is_pinned) { + /* Sanity check */ + HDassert(parent_entry->flush_dep_nchildren == 0); + HDassert(!parent_entry->pinned_from_client); + HDassert(!parent_entry->pinned_from_cache); - /* Pin the parent entry */ - parent_entry->is_pinned = TRUE; - H5C__UPDATE_STATS_FOR_PIN(cache_ptr, parent_entry) - } /* end else */ + /* Pin the parent entry */ + parent_entry->is_pinned = TRUE; + H5C__UPDATE_STATS_FOR_PIN(cache_ptr, parent_entry) + } /* end else */ - /* Mark the entry as pinned from the cache's action (possibly redundantly) */ - parent_entry->pinned_from_cache = TRUE; + /* Mark the entry as pinned from the cache's action (possibly redundantly) */ + parent_entry->pinned_from_cache = TRUE; - /* Check if we need to resize the child's parent array */ - if (child_entry->flush_dep_nparents >= child_entry->flush_dep_parent_nalloc) { - if (child_entry->flush_dep_parent_nalloc == 0) { - /* Array does not exist yet, allocate it */ - HDassert(!child_entry->flush_dep_parent); + /* Check if we need to resize the child's parent array */ + if (child_entry->flush_dep_nparents >= child_entry->flush_dep_parent_nalloc) { + if (child_entry->flush_dep_parent_nalloc == 0) { + /* Array does not exist yet, allocate it */ + HDassert(!child_entry->flush_dep_parent); - if (NULL == (child_entry->flush_dep_parent = - H5FL_SEQ_MALLOC(H5C_cache_entry_ptr_t, H5C_FLUSH_DEP_PARENT_INIT))) - HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, - "memory allocation failed for flush dependency parent list") - child_entry->flush_dep_parent_nalloc = H5C_FLUSH_DEP_PARENT_INIT; - } /* end if */ - else { - /* Resize existing array */ - HDassert(child_entry->flush_dep_parent); - - if (NULL == (child_entry->flush_dep_parent = - H5FL_SEQ_REALLOC(H5C_cache_entry_ptr_t, child_entry->flush_dep_parent, - 2 * child_entry->flush_dep_parent_nalloc))) - HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, - "memory allocation failed for flush dependency parent list") - child_entry->flush_dep_parent_nalloc *= 2; - } /* end else */ - cache_ptr->entry_fd_height_change_counter++; + if (NULL == (child_entry->flush_dep_parent = + H5FL_SEQ_MALLOC(H5C_cache_entry_ptr_t, H5C_FLUSH_DEP_PARENT_INIT))) + HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, + "memory allocation failed for flush dependency parent list") + child_entry->flush_dep_parent_nalloc = H5C_FLUSH_DEP_PARENT_INIT; } /* end if */ + else { + /* Resize existing array */ + HDassert(child_entry->flush_dep_parent); + + if (NULL == (child_entry->flush_dep_parent = + H5FL_SEQ_REALLOC(H5C_cache_entry_ptr_t, child_entry->flush_dep_parent, + 2 * child_entry->flush_dep_parent_nalloc))) + HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, + "memory allocation failed for flush dependency parent list") + child_entry->flush_dep_parent_nalloc *= 2; + } /* end else */ + cache_ptr->entry_fd_height_change_counter++; + } /* end if */ - /* Add the dependency to the child's parent array */ - child_entry->flush_dep_parent[child_entry->flush_dep_nparents] = parent_entry; - child_entry->flush_dep_nparents++; + /* Add the dependency to the child's parent array */ + child_entry->flush_dep_parent[child_entry->flush_dep_nparents] = parent_entry; + child_entry->flush_dep_nparents++; - /* Increment parent's number of children */ - parent_entry->flush_dep_nchildren++; + /* Increment parent's number of children */ + parent_entry->flush_dep_nchildren++; - /* Adjust the number of dirty children */ - if (child_entry->is_dirty) { - /* Sanity check */ - HDassert(parent_entry->flush_dep_ndirty_children < parent_entry->flush_dep_nchildren); + /* Adjust the number of dirty children */ + if (child_entry->is_dirty) { + /* Sanity check */ + HDassert(parent_entry->flush_dep_ndirty_children < parent_entry->flush_dep_nchildren); - parent_entry->flush_dep_ndirty_children++; + parent_entry->flush_dep_ndirty_children++; - /* If the parent has a 'notify' callback, send a 'child entry dirtied' notice */ - if (parent_entry->type->notify && - (parent_entry->type->notify)(H5C_NOTIFY_ACTION_CHILD_DIRTIED, parent_entry) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, - "can't notify parent about child entry dirty flag set") - } /* end if */ + /* If the parent has a 'notify' callback, send a 'child entry dirtied' notice */ + if (parent_entry->type->notify && + (parent_entry->type->notify)(H5C_NOTIFY_ACTION_CHILD_DIRTIED, parent_entry) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, + "can't notify parent about child entry dirty flag set") + } /* end if */ - /* adjust the parent's number of unserialized children. Note - * that it is possible for and entry to be clean and unserialized. - */ - if (!child_entry->image_up_to_date) { - HDassert(parent_entry->flush_dep_nunser_children < parent_entry->flush_dep_nchildren); + /* adjust the parent's number of unserialized children. Note + * that it is possible for and entry to be clean and unserialized. + */ + if (!child_entry->image_up_to_date) { + HDassert(parent_entry->flush_dep_nunser_children < parent_entry->flush_dep_nchildren); - parent_entry->flush_dep_nunser_children++; + parent_entry->flush_dep_nunser_children++; - /* If the parent has a 'notify' callback, send a 'child entry unserialized' notice */ - if (parent_entry->type->notify && - (parent_entry->type->notify)(H5C_NOTIFY_ACTION_CHILD_UNSERIALIZED, parent_entry) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, - "can't notify parent about child entry serialized flag reset") - } /* end if */ + /* If the parent has a 'notify' callback, send a 'child entry unserialized' notice */ + if (parent_entry->type->notify && + (parent_entry->type->notify)(H5C_NOTIFY_ACTION_CHILD_UNSERIALIZED, parent_entry) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, + "can't notify parent about child entry serialized flag reset") + } /* end if */ - /* Post-conditions, for successful operation */ - HDassert(parent_entry->is_pinned); - HDassert(parent_entry->flush_dep_nchildren > 0); - HDassert(child_entry->flush_dep_parent); - HDassert(child_entry->flush_dep_nparents > 0); - HDassert(child_entry->flush_dep_parent_nalloc > 0); + /* Post-conditions, for successful operation */ + HDassert(parent_entry->is_pinned); + HDassert(parent_entry->flush_dep_nchildren > 0); + HDassert(child_entry->flush_dep_parent); + HDassert(child_entry->flush_dep_nparents > 0); + HDassert(child_entry->flush_dep_parent_nalloc > 0); #ifndef NDEBUG - H5C__assert_flush_dep_nocycle(parent_entry, child_entry); + H5C__assert_flush_dep_nocycle(parent_entry, child_entry); #endif /* NDEBUG */ done: - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C_create_flush_dependency() */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C_create_flush_dependency() */ - /*------------------------------------------------------------------------- - * Function: H5C_destroy_flush_dependency() - * - * Purpose: Terminates a parent<-> child entry flush dependency. The - * parent entry must be pinned. - * - * Return: Non-negative on success/Negative on failure - * - * Programmer: Quincey Koziol - * 3/05/09 - * - *------------------------------------------------------------------------- - */ - herr_t H5C_destroy_flush_dependency(void *parent_thing, void *child_thing) - { - H5C_t *cache_ptr; - H5C_cache_entry_t *parent_entry = (H5C_cache_entry_t *)parent_thing; /* Ptr to parent entry */ - H5C_cache_entry_t *child_entry = (H5C_cache_entry_t *)child_thing; /* Ptr to child entry */ - unsigned u; /* Local index variable */ - herr_t ret_value = SUCCEED; /* Return value */ +/*------------------------------------------------------------------------- + * Function: H5C_destroy_flush_dependency() + * + * Purpose: Terminates a parent<-> child entry flush dependency. The + * parent entry must be pinned. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Quincey Koziol + * 3/05/09 + * + *------------------------------------------------------------------------- + */ +herr_t +H5C_destroy_flush_dependency(void *parent_thing, void *child_thing) +{ + H5C_t *cache_ptr; + H5C_cache_entry_t *parent_entry = (H5C_cache_entry_t *)parent_thing; /* Ptr to parent entry */ + H5C_cache_entry_t *child_entry = (H5C_cache_entry_t *)child_thing; /* Ptr to child entry */ + unsigned u; /* Local index variable */ + herr_t ret_value = SUCCEED; /* Return value */ - FUNC_ENTER_NOAPI(FAIL) + FUNC_ENTER_NOAPI(FAIL) - /* Sanity checks */ - HDassert(parent_entry); - HDassert(parent_entry->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(H5F_addr_defined(parent_entry->addr)); - HDassert(child_entry); - HDassert(child_entry->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(H5F_addr_defined(child_entry->addr)); - cache_ptr = parent_entry->cache_ptr; - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - HDassert(cache_ptr == child_entry->cache_ptr); - - /* Usage checks */ - if (!parent_entry->is_pinned) - HGOTO_ERROR(H5E_CACHE, H5E_CANTUNDEPEND, FAIL, "Parent entry isn't pinned") - if (NULL == child_entry->flush_dep_parent) - HGOTO_ERROR(H5E_CACHE, H5E_CANTUNDEPEND, FAIL, - "Child entry doesn't have a flush dependency parent array") - if (0 == parent_entry->flush_dep_nchildren) - HGOTO_ERROR(H5E_CACHE, H5E_CANTUNDEPEND, FAIL, - "Parent entry flush dependency ref. count has no child dependencies") - - /* Search for parent in child's parent array. This is a linear search - * because we do not expect large numbers of parents. If this changes, we - * may wish to change the parent array to a skip list */ - for (u = 0; u < child_entry->flush_dep_nparents; u++) - if (child_entry->flush_dep_parent[u] == parent_entry) - break; - if (u == child_entry->flush_dep_nparents) - HGOTO_ERROR(H5E_CACHE, H5E_CANTUNDEPEND, FAIL, - "Parent entry isn't a flush dependency parent for child entry") - - /* Remove parent entry from child's parent array */ - if (u < (child_entry->flush_dep_nparents - 1)) - HDmemmove(&child_entry->flush_dep_parent[u], &child_entry->flush_dep_parent[u + 1], - (child_entry->flush_dep_nparents - u - 1) * sizeof(child_entry->flush_dep_parent[0])); - child_entry->flush_dep_nparents--; - - /* Adjust parent entry's nchildren and unpin parent if it goes to zero */ - parent_entry->flush_dep_nchildren--; - if (0 == parent_entry->flush_dep_nchildren) { - /* Sanity check */ - HDassert(parent_entry->pinned_from_cache); + /* Sanity checks */ + HDassert(parent_entry); + HDassert(parent_entry->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(H5F_addr_defined(parent_entry->addr)); + HDassert(child_entry); + HDassert(child_entry->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(H5F_addr_defined(child_entry->addr)); + cache_ptr = parent_entry->cache_ptr; + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(cache_ptr == child_entry->cache_ptr); + + /* Usage checks */ + if (!parent_entry->is_pinned) + HGOTO_ERROR(H5E_CACHE, H5E_CANTUNDEPEND, FAIL, "Parent entry isn't pinned") + if (NULL == child_entry->flush_dep_parent) + HGOTO_ERROR(H5E_CACHE, H5E_CANTUNDEPEND, FAIL, + "Child entry doesn't have a flush dependency parent array") + if (0 == parent_entry->flush_dep_nchildren) + HGOTO_ERROR(H5E_CACHE, H5E_CANTUNDEPEND, FAIL, + "Parent entry flush dependency ref. count has no child dependencies") + + /* Search for parent in child's parent array. This is a linear search + * because we do not expect large numbers of parents. If this changes, we + * may wish to change the parent array to a skip list */ + for (u = 0; u < child_entry->flush_dep_nparents; u++) + if (child_entry->flush_dep_parent[u] == parent_entry) + break; + if (u == child_entry->flush_dep_nparents) + HGOTO_ERROR(H5E_CACHE, H5E_CANTUNDEPEND, FAIL, + "Parent entry isn't a flush dependency parent for child entry") + + /* Remove parent entry from child's parent array */ + if (u < (child_entry->flush_dep_nparents - 1)) + HDmemmove(&child_entry->flush_dep_parent[u], &child_entry->flush_dep_parent[u + 1], + (child_entry->flush_dep_nparents - u - 1) * sizeof(child_entry->flush_dep_parent[0])); + child_entry->flush_dep_nparents--; + + /* Adjust parent entry's nchildren and unpin parent if it goes to zero */ + parent_entry->flush_dep_nchildren--; + if (0 == parent_entry->flush_dep_nchildren) { + /* Sanity check */ + HDassert(parent_entry->pinned_from_cache); - /* Check if we should unpin parent entry now */ - if (!parent_entry->pinned_from_client) - if (H5C__unpin_entry_real(cache_ptr, parent_entry, TRUE) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "Can't unpin entry") + /* Check if we should unpin parent entry now */ + if (!parent_entry->pinned_from_client) + if (H5C__unpin_entry_real(cache_ptr, parent_entry, TRUE) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "Can't unpin entry") - /* Mark the entry as unpinned from the cache's action */ - parent_entry->pinned_from_cache = FALSE; - } /* end if */ + /* Mark the entry as unpinned from the cache's action */ + parent_entry->pinned_from_cache = FALSE; + } /* end if */ - /* Adjust parent entry's ndirty_children */ - if (child_entry->is_dirty) { - /* Sanity check */ - HDassert(parent_entry->flush_dep_ndirty_children > 0); + /* Adjust parent entry's ndirty_children */ + if (child_entry->is_dirty) { + /* Sanity check */ + HDassert(parent_entry->flush_dep_ndirty_children > 0); - parent_entry->flush_dep_ndirty_children--; + parent_entry->flush_dep_ndirty_children--; - /* If the parent has a 'notify' callback, send a 'child entry cleaned' notice */ - if (parent_entry->type->notify && - (parent_entry->type->notify)(H5C_NOTIFY_ACTION_CHILD_CLEANED, parent_entry) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, - "can't notify parent about child entry dirty flag reset") - } /* end if */ + /* If the parent has a 'notify' callback, send a 'child entry cleaned' notice */ + if (parent_entry->type->notify && + (parent_entry->type->notify)(H5C_NOTIFY_ACTION_CHILD_CLEANED, parent_entry) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, + "can't notify parent about child entry dirty flag reset") + } /* end if */ - /* adjust parent entry's number of unserialized children */ - if (!child_entry->image_up_to_date) { - HDassert(parent_entry->flush_dep_nunser_children > 0); + /* adjust parent entry's number of unserialized children */ + if (!child_entry->image_up_to_date) { + HDassert(parent_entry->flush_dep_nunser_children > 0); - parent_entry->flush_dep_nunser_children--; + parent_entry->flush_dep_nunser_children--; - /* If the parent has a 'notify' callback, send a 'child entry serialized' notice */ - if (parent_entry->type->notify && - (parent_entry->type->notify)(H5C_NOTIFY_ACTION_CHILD_SERIALIZED, parent_entry) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, - "can't notify parent about child entry serialized flag set") - } /* end if */ + /* If the parent has a 'notify' callback, send a 'child entry serialized' notice */ + if (parent_entry->type->notify && + (parent_entry->type->notify)(H5C_NOTIFY_ACTION_CHILD_SERIALIZED, parent_entry) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, + "can't notify parent about child entry serialized flag set") + } /* end if */ - /* Shrink or free the parent array if appropriate */ - if (child_entry->flush_dep_nparents == 0) { - child_entry->flush_dep_parent = - H5FL_SEQ_FREE(H5C_cache_entry_ptr_t, child_entry->flush_dep_parent); - child_entry->flush_dep_parent_nalloc = 0; - } /* end if */ - else if (child_entry->flush_dep_parent_nalloc > H5C_FLUSH_DEP_PARENT_INIT && - child_entry->flush_dep_nparents <= (child_entry->flush_dep_parent_nalloc / 4)) { - if (NULL == (child_entry->flush_dep_parent = - H5FL_SEQ_REALLOC(H5C_cache_entry_ptr_t, child_entry->flush_dep_parent, - child_entry->flush_dep_parent_nalloc / 4))) - HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, - "memory allocation failed for flush dependency parent list") - child_entry->flush_dep_parent_nalloc /= 4; - } /* end if */ + /* Shrink or free the parent array if appropriate */ + if (child_entry->flush_dep_nparents == 0) { + child_entry->flush_dep_parent = H5FL_SEQ_FREE(H5C_cache_entry_ptr_t, child_entry->flush_dep_parent); + child_entry->flush_dep_parent_nalloc = 0; + } /* end if */ + else if (child_entry->flush_dep_parent_nalloc > H5C_FLUSH_DEP_PARENT_INIT && + child_entry->flush_dep_nparents <= (child_entry->flush_dep_parent_nalloc / 4)) { + if (NULL == (child_entry->flush_dep_parent = + H5FL_SEQ_REALLOC(H5C_cache_entry_ptr_t, child_entry->flush_dep_parent, + child_entry->flush_dep_parent_nalloc / 4))) + HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, + "memory allocation failed for flush dependency parent list") + child_entry->flush_dep_parent_nalloc /= 4; + } /* end if */ done: - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C_destroy_flush_dependency() */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C_destroy_flush_dependency() */ /*************************************************************************/ /**************************** Private Functions: *************************/ @@ -4153,3622 +4153,3623 @@ done: *------------------------------------------------------------------------- */ #if H5C_COLLECT_CACHE_STATS - static herr_t H5C__pin_entry_from_client(H5C_t * cache_ptr, H5C_cache_entry_t * entry_ptr) +static herr_t +H5C__pin_entry_from_client(H5C_t *cache_ptr, H5C_cache_entry_t *entry_ptr) #else static herr_t H5C__pin_entry_from_client(H5C_t H5_ATTR_UNUSED *cache_ptr, H5C_cache_entry_t *entry_ptr) #endif - { - herr_t ret_value = SUCCEED; /* Return value */ +{ + herr_t ret_value = SUCCEED; /* Return value */ - FUNC_ENTER_STATIC + FUNC_ENTER_STATIC - /* Sanity checks */ - HDassert(cache_ptr); - HDassert(entry_ptr); - HDassert(entry_ptr->is_protected); + /* Sanity checks */ + HDassert(cache_ptr); + HDassert(entry_ptr); + HDassert(entry_ptr->is_protected); - /* Check if the entry is already pinned */ - if (entry_ptr->is_pinned) { - /* Check if the entry was pinned through an explicit pin from a client */ - if (entry_ptr->pinned_from_client) - HGOTO_ERROR(H5E_CACHE, H5E_CANTPIN, FAIL, "entry is already pinned") - } /* end if */ - else { - entry_ptr->is_pinned = TRUE; + /* Check if the entry is already pinned */ + if (entry_ptr->is_pinned) { + /* Check if the entry was pinned through an explicit pin from a client */ + if (entry_ptr->pinned_from_client) + HGOTO_ERROR(H5E_CACHE, H5E_CANTPIN, FAIL, "entry is already pinned") + } /* end if */ + else { + entry_ptr->is_pinned = TRUE; - H5C__UPDATE_STATS_FOR_PIN(cache_ptr, entry_ptr) - } /* end else */ + H5C__UPDATE_STATS_FOR_PIN(cache_ptr, entry_ptr) + } /* end else */ - /* Mark that the entry was pinned through an explicit pin from a client */ - entry_ptr->pinned_from_client = TRUE; + /* Mark that the entry was pinned through an explicit pin from a client */ + entry_ptr->pinned_from_client = TRUE; done: - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__pin_entry_from_client() */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C__pin_entry_from_client() */ - /*------------------------------------------------------------------------- - * Function: H5C__unpin_entry_real() - * - * Purpose: Internal routine to unpin a cache entry. - * - * Return: Non-negative on success/Negative on failure - * - * Programmer: Quincey Koziol - * 1/6/18 - * - *------------------------------------------------------------------------- - */ - static herr_t H5C__unpin_entry_real(H5C_t * cache_ptr, H5C_cache_entry_t * entry_ptr, hbool_t update_rp) - { - herr_t ret_value = SUCCEED; /* Return value */ +/*------------------------------------------------------------------------- + * Function: H5C__unpin_entry_real() + * + * Purpose: Internal routine to unpin a cache entry. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Quincey Koziol + * 1/6/18 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C__unpin_entry_real(H5C_t *cache_ptr, H5C_cache_entry_t *entry_ptr, hbool_t update_rp) +{ + herr_t ret_value = SUCCEED; /* Return value */ - FUNC_ENTER_STATIC + FUNC_ENTER_STATIC - /* Sanity checking */ - HDassert(cache_ptr); - HDassert(entry_ptr); - HDassert(entry_ptr->is_pinned); + /* Sanity checking */ + HDassert(cache_ptr); + HDassert(entry_ptr); + HDassert(entry_ptr->is_pinned); - /* If requested, update the replacement policy if the entry is not protected */ - if (update_rp && !entry_ptr->is_protected) - H5C__UPDATE_RP_FOR_UNPIN(cache_ptr, entry_ptr, FAIL) + /* If requested, update the replacement policy if the entry is not protected */ + if (update_rp && !entry_ptr->is_protected) + H5C__UPDATE_RP_FOR_UNPIN(cache_ptr, entry_ptr, FAIL) - /* Unpin the entry now */ - entry_ptr->is_pinned = FALSE; + /* Unpin the entry now */ + entry_ptr->is_pinned = FALSE; - /* Update the stats for an unpin operation */ - H5C__UPDATE_STATS_FOR_UNPIN(cache_ptr, entry_ptr) + /* Update the stats for an unpin operation */ + H5C__UPDATE_STATS_FOR_UNPIN(cache_ptr, entry_ptr) done: - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__unpin_entry_real() */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C__unpin_entry_real() */ - /*------------------------------------------------------------------------- - * Function: H5C__unpin_entry_from_client() - * - * Purpose: Internal routine to unpin a cache entry from a client action. - * - * Return: Non-negative on success/Negative on failure - * - * Programmer: Quincey Koziol - * 3/24/09 - * - *------------------------------------------------------------------------- - */ - static herr_t H5C__unpin_entry_from_client(H5C_t * cache_ptr, H5C_cache_entry_t * entry_ptr, - hbool_t update_rp) - { - herr_t ret_value = SUCCEED; /* Return value */ +/*------------------------------------------------------------------------- + * Function: H5C__unpin_entry_from_client() + * + * Purpose: Internal routine to unpin a cache entry from a client action. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Quincey Koziol + * 3/24/09 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C__unpin_entry_from_client(H5C_t *cache_ptr, H5C_cache_entry_t *entry_ptr, hbool_t update_rp) +{ + herr_t ret_value = SUCCEED; /* Return value */ - FUNC_ENTER_STATIC + FUNC_ENTER_STATIC - /* Sanity checking */ - HDassert(cache_ptr); - HDassert(entry_ptr); + /* Sanity checking */ + HDassert(cache_ptr); + HDassert(entry_ptr); - /* Error checking (should be sanity checks?) */ - if (!entry_ptr->is_pinned) - HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "entry isn't pinned") - if (!entry_ptr->pinned_from_client) - HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "entry wasn't pinned by cache client") + /* Error checking (should be sanity checks?) */ + if (!entry_ptr->is_pinned) + HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "entry isn't pinned") + if (!entry_ptr->pinned_from_client) + HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "entry wasn't pinned by cache client") - /* Check if the entry is not pinned from a flush dependency */ - if (!entry_ptr->pinned_from_cache) - if (H5C__unpin_entry_real(cache_ptr, entry_ptr, update_rp) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "can't unpin entry") + /* Check if the entry is not pinned from a flush dependency */ + if (!entry_ptr->pinned_from_cache) + if (H5C__unpin_entry_real(cache_ptr, entry_ptr, update_rp) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "can't unpin entry") - /* Mark the entry as explicitly unpinned by the client */ - entry_ptr->pinned_from_client = FALSE; + /* Mark the entry as explicitly unpinned by the client */ + entry_ptr->pinned_from_client = FALSE; done: - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__unpin_entry_from_client() */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C__unpin_entry_from_client() */ - /*------------------------------------------------------------------------- - * - * Function: H5C__auto_adjust_cache_size - * - * Purpose: Obtain the current full cache hit rate, and compare it - * with the hit rate thresholds for modifying cache size. - * If one of the thresholds has been crossed, adjusts the - * size of the cache accordingly. - * - * The function then resets the full cache hit rate - * statistics, and exits. - * - * Return: Non-negative on success/Negative on failure or if there was - * an attempt to flush a protected item. - * - * - * Programmer: John Mainzer, 10/7/04 - * - *------------------------------------------------------------------------- - */ - static herr_t H5C__auto_adjust_cache_size(H5F_t * f, hbool_t write_permitted) - { - H5C_t *cache_ptr = f->shared->cache; - hbool_t reentrant_call = FALSE; - hbool_t inserted_epoch_marker = FALSE; - size_t new_max_cache_size = 0; - size_t old_max_cache_size = 0; - size_t new_min_clean_size = 0; - size_t old_min_clean_size = 0; - double hit_rate; - enum H5C_resize_status status = in_spec; /* will change if needed */ - herr_t ret_value = SUCCEED; /* Return value */ - - FUNC_ENTER_NOAPI_NOINIT - - HDassert(f); - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - HDassert(cache_ptr->cache_accesses >= (cache_ptr->resize_ctl).epoch_length); - HDassert((double)0.0f <= (cache_ptr->resize_ctl).min_clean_fraction); - HDassert((cache_ptr->resize_ctl).min_clean_fraction <= (double)100.0f); - - /* check to see if cache_ptr->resize_in_progress is TRUE. If it, this - * is a re-entrant call via a client callback called in the resize - * process. To avoid an infinite recursion, set reentrant_call to - * TRUE, and goto done. - */ - if (cache_ptr->resize_in_progress) { - reentrant_call = TRUE; - HGOTO_DONE(SUCCEED) - } /* end if */ +/*------------------------------------------------------------------------- + * + * Function: H5C__auto_adjust_cache_size + * + * Purpose: Obtain the current full cache hit rate, and compare it + * with the hit rate thresholds for modifying cache size. + * If one of the thresholds has been crossed, adjusts the + * size of the cache accordingly. + * + * The function then resets the full cache hit rate + * statistics, and exits. + * + * Return: Non-negative on success/Negative on failure or if there was + * an attempt to flush a protected item. + * + * + * Programmer: John Mainzer, 10/7/04 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C__auto_adjust_cache_size(H5F_t *f, hbool_t write_permitted) +{ + H5C_t *cache_ptr = f->shared->cache; + hbool_t reentrant_call = FALSE; + hbool_t inserted_epoch_marker = FALSE; + size_t new_max_cache_size = 0; + size_t old_max_cache_size = 0; + size_t new_min_clean_size = 0; + size_t old_min_clean_size = 0; + double hit_rate; + enum H5C_resize_status status = in_spec; /* will change if needed */ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_NOAPI_NOINIT - cache_ptr->resize_in_progress = TRUE; + HDassert(f); + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(cache_ptr->cache_accesses >= (cache_ptr->resize_ctl).epoch_length); + HDassert((double)0.0f <= (cache_ptr->resize_ctl).min_clean_fraction); + HDassert((cache_ptr->resize_ctl).min_clean_fraction <= (double)100.0f); + + /* check to see if cache_ptr->resize_in_progress is TRUE. If it, this + * is a re-entrant call via a client callback called in the resize + * process. To avoid an infinite recursion, set reentrant_call to + * TRUE, and goto done. + */ + if (cache_ptr->resize_in_progress) { + reentrant_call = TRUE; + HGOTO_DONE(SUCCEED) + } /* end if */ - if (!cache_ptr->resize_enabled) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Auto cache resize disabled") + cache_ptr->resize_in_progress = TRUE; - HDassert(((cache_ptr->resize_ctl).incr_mode != H5C_incr__off) || - ((cache_ptr->resize_ctl).decr_mode != H5C_decr__off)); + if (!cache_ptr->resize_enabled) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Auto cache resize disabled") - if (H5C_get_cache_hit_rate(cache_ptr, &hit_rate) != SUCCEED) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Can't get hit rate") + HDassert(((cache_ptr->resize_ctl).incr_mode != H5C_incr__off) || + ((cache_ptr->resize_ctl).decr_mode != H5C_decr__off)); - HDassert(((double)0.0f <= hit_rate) && (hit_rate <= (double)1.0f)); + if (H5C_get_cache_hit_rate(cache_ptr, &hit_rate) != SUCCEED) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Can't get hit rate") - switch ((cache_ptr->resize_ctl).incr_mode) { - case H5C_incr__off: - if (cache_ptr->size_increase_possible) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "size_increase_possible but H5C_incr__off?!?!?") - break; + HDassert(((double)0.0f <= hit_rate) && (hit_rate <= (double)1.0f)); - case H5C_incr__threshold: - if (hit_rate < (cache_ptr->resize_ctl).lower_hr_threshold) { + switch ((cache_ptr->resize_ctl).incr_mode) { + case H5C_incr__off: + if (cache_ptr->size_increase_possible) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "size_increase_possible but H5C_incr__off?!?!?") + break; - if (!cache_ptr->size_increase_possible) { + case H5C_incr__threshold: + if (hit_rate < (cache_ptr->resize_ctl).lower_hr_threshold) { - status = increase_disabled; - } - else if (cache_ptr->max_cache_size >= (cache_ptr->resize_ctl).max_size) { + if (!cache_ptr->size_increase_possible) { - HDassert(cache_ptr->max_cache_size == (cache_ptr->resize_ctl).max_size); - status = at_max_size; - } - else if (!cache_ptr->cache_full) { + status = increase_disabled; + } + else if (cache_ptr->max_cache_size >= (cache_ptr->resize_ctl).max_size) { - status = not_full; - } - else { + HDassert(cache_ptr->max_cache_size == (cache_ptr->resize_ctl).max_size); + status = at_max_size; + } + else if (!cache_ptr->cache_full) { - new_max_cache_size = (size_t)(((double)(cache_ptr->max_cache_size)) * - (cache_ptr->resize_ctl).increment); + status = not_full; + } + else { - /* clip to max size if necessary */ - if (new_max_cache_size > (cache_ptr->resize_ctl).max_size) { + new_max_cache_size = + (size_t)(((double)(cache_ptr->max_cache_size)) * (cache_ptr->resize_ctl).increment); - new_max_cache_size = (cache_ptr->resize_ctl).max_size; - } + /* clip to max size if necessary */ + if (new_max_cache_size > (cache_ptr->resize_ctl).max_size) { - /* clip to max increment if necessary */ - if (((cache_ptr->resize_ctl).apply_max_increment) && - ((cache_ptr->max_cache_size + (cache_ptr->resize_ctl).max_increment) < - new_max_cache_size)) { + new_max_cache_size = (cache_ptr->resize_ctl).max_size; + } - new_max_cache_size = - cache_ptr->max_cache_size + (cache_ptr->resize_ctl).max_increment; - } + /* clip to max increment if necessary */ + if (((cache_ptr->resize_ctl).apply_max_increment) && + ((cache_ptr->max_cache_size + (cache_ptr->resize_ctl).max_increment) < + new_max_cache_size)) { - status = increase; + new_max_cache_size = + cache_ptr->max_cache_size + (cache_ptr->resize_ctl).max_increment; } - } - break; - default: - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unknown incr_mode") - } + status = increase; + } + } + break; - /* If the decr_mode is either age out or age out with threshold, we - * must run the marker maintenance code, whether we run the size - * reduction code or not. We do this in two places -- here we - * insert a new marker if the number of active epoch markers is - * is less than the the current epochs before eviction, and after - * the ageout call, we cycle the markers. - * - * However, we can't call the ageout code or cycle the markers - * unless there was a full complement of markers in place on - * entry. The inserted_epoch_marker flag is used to track this. - */ + default: + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unknown incr_mode") + } - if ((((cache_ptr->resize_ctl).decr_mode == H5C_decr__age_out) || - ((cache_ptr->resize_ctl).decr_mode == H5C_decr__age_out_with_threshold)) && - (cache_ptr->epoch_markers_active < (cache_ptr->resize_ctl).epochs_before_eviction)) { + /* If the decr_mode is either age out or age out with threshold, we + * must run the marker maintenance code, whether we run the size + * reduction code or not. We do this in two places -- here we + * insert a new marker if the number of active epoch markers is + * is less than the the current epochs before eviction, and after + * the ageout call, we cycle the markers. + * + * However, we can't call the ageout code or cycle the markers + * unless there was a full complement of markers in place on + * entry. The inserted_epoch_marker flag is used to track this. + */ - if (H5C__autoadjust__ageout__insert_new_marker(cache_ptr) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "can't insert new epoch marker") + if ((((cache_ptr->resize_ctl).decr_mode == H5C_decr__age_out) || + ((cache_ptr->resize_ctl).decr_mode == H5C_decr__age_out_with_threshold)) && + (cache_ptr->epoch_markers_active < (cache_ptr->resize_ctl).epochs_before_eviction)) { - inserted_epoch_marker = TRUE; - } + if (H5C__autoadjust__ageout__insert_new_marker(cache_ptr) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "can't insert new epoch marker") - /* don't run the cache size decrease code unless the cache size - * increase code is disabled, or the size increase code sees no need - * for action. In either case, status == in_spec at this point. - */ + inserted_epoch_marker = TRUE; + } - if (status == in_spec) { + /* don't run the cache size decrease code unless the cache size + * increase code is disabled, or the size increase code sees no need + * for action. In either case, status == in_spec at this point. + */ - switch ((cache_ptr->resize_ctl).decr_mode) { - case H5C_decr__off: - break; + if (status == in_spec) { - case H5C_decr__threshold: - if (hit_rate > (cache_ptr->resize_ctl).upper_hr_threshold) { + switch ((cache_ptr->resize_ctl).decr_mode) { + case H5C_decr__off: + break; - if (!cache_ptr->size_decrease_possible) { + case H5C_decr__threshold: + if (hit_rate > (cache_ptr->resize_ctl).upper_hr_threshold) { - status = decrease_disabled; - } - else if (cache_ptr->max_cache_size <= (cache_ptr->resize_ctl).min_size) { + if (!cache_ptr->size_decrease_possible) { - HDassert(cache_ptr->max_cache_size == (cache_ptr->resize_ctl).min_size); - status = at_min_size; - } - else { + status = decrease_disabled; + } + else if (cache_ptr->max_cache_size <= (cache_ptr->resize_ctl).min_size) { - new_max_cache_size = (size_t)(((double)(cache_ptr->max_cache_size)) * - (cache_ptr->resize_ctl).decrement); + HDassert(cache_ptr->max_cache_size == (cache_ptr->resize_ctl).min_size); + status = at_min_size; + } + else { - /* clip to min size if necessary */ - if (new_max_cache_size < (cache_ptr->resize_ctl).min_size) { + new_max_cache_size = (size_t)(((double)(cache_ptr->max_cache_size)) * + (cache_ptr->resize_ctl).decrement); - new_max_cache_size = (cache_ptr->resize_ctl).min_size; - } + /* clip to min size if necessary */ + if (new_max_cache_size < (cache_ptr->resize_ctl).min_size) { - /* clip to max decrement if necessary */ - if (((cache_ptr->resize_ctl).apply_max_decrement) && - (((cache_ptr->resize_ctl).max_decrement + new_max_cache_size) < - cache_ptr->max_cache_size)) { + new_max_cache_size = (cache_ptr->resize_ctl).min_size; + } - new_max_cache_size = - cache_ptr->max_cache_size - (cache_ptr->resize_ctl).max_decrement; - } + /* clip to max decrement if necessary */ + if (((cache_ptr->resize_ctl).apply_max_decrement) && + (((cache_ptr->resize_ctl).max_decrement + new_max_cache_size) < + cache_ptr->max_cache_size)) { - status = decrease; + new_max_cache_size = + cache_ptr->max_cache_size - (cache_ptr->resize_ctl).max_decrement; } + + status = decrease; } - break; + } + break; - case H5C_decr__age_out_with_threshold: - case H5C_decr__age_out: - if (!inserted_epoch_marker) { - if (!cache_ptr->size_decrease_possible) - status = decrease_disabled; - else { - if (H5C__autoadjust__ageout(f, hit_rate, &status, &new_max_cache_size, - write_permitted) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "ageout code failed") - } /* end else */ - } /* end if */ - break; + case H5C_decr__age_out_with_threshold: + case H5C_decr__age_out: + if (!inserted_epoch_marker) { + if (!cache_ptr->size_decrease_possible) + status = decrease_disabled; + else { + if (H5C__autoadjust__ageout(f, hit_rate, &status, &new_max_cache_size, + write_permitted) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "ageout code failed") + } /* end else */ + } /* end if */ + break; - default: - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unknown incr_mode") - } + default: + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unknown incr_mode") } + } - /* cycle the epoch markers here if appropriate */ - if ((((cache_ptr->resize_ctl).decr_mode == H5C_decr__age_out) || - ((cache_ptr->resize_ctl).decr_mode == H5C_decr__age_out_with_threshold)) && - (!inserted_epoch_marker)) { + /* cycle the epoch markers here if appropriate */ + if ((((cache_ptr->resize_ctl).decr_mode == H5C_decr__age_out) || + ((cache_ptr->resize_ctl).decr_mode == H5C_decr__age_out_with_threshold)) && + (!inserted_epoch_marker)) { - /* move last epoch marker to the head of the LRU list */ - if (H5C__autoadjust__ageout__cycle_epoch_marker(cache_ptr) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "error cycling epoch marker") - } + /* move last epoch marker to the head of the LRU list */ + if (H5C__autoadjust__ageout__cycle_epoch_marker(cache_ptr) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "error cycling epoch marker") + } - if ((status == increase) || (status == decrease)) { + if ((status == increase) || (status == decrease)) { - old_max_cache_size = cache_ptr->max_cache_size; - old_min_clean_size = cache_ptr->min_clean_size; + old_max_cache_size = cache_ptr->max_cache_size; + old_min_clean_size = cache_ptr->min_clean_size; - new_min_clean_size = - (size_t)((double)new_max_cache_size * ((cache_ptr->resize_ctl).min_clean_fraction)); + new_min_clean_size = + (size_t)((double)new_max_cache_size * ((cache_ptr->resize_ctl).min_clean_fraction)); - /* new_min_clean_size is of size_t, and thus must be non-negative. - * Hence we have - * - * ( 0 <= new_min_clean_size ). - * - * by definition. - */ - HDassert(new_min_clean_size <= new_max_cache_size); - HDassert((cache_ptr->resize_ctl).min_size <= new_max_cache_size); - HDassert(new_max_cache_size <= (cache_ptr->resize_ctl).max_size); + /* new_min_clean_size is of size_t, and thus must be non-negative. + * Hence we have + * + * ( 0 <= new_min_clean_size ). + * + * by definition. + */ + HDassert(new_min_clean_size <= new_max_cache_size); + HDassert((cache_ptr->resize_ctl).min_size <= new_max_cache_size); + HDassert(new_max_cache_size <= (cache_ptr->resize_ctl).max_size); - cache_ptr->max_cache_size = new_max_cache_size; - cache_ptr->min_clean_size = new_min_clean_size; + cache_ptr->max_cache_size = new_max_cache_size; + cache_ptr->min_clean_size = new_min_clean_size; - if (status == increase) { + if (status == increase) { - cache_ptr->cache_full = FALSE; - } - else if (status == decrease) { + cache_ptr->cache_full = FALSE; + } + else if (status == decrease) { - cache_ptr->size_decreased = TRUE; - } + cache_ptr->size_decreased = TRUE; + } - /* update flash cache size increase fields as appropriate */ - if (cache_ptr->flash_size_increase_possible) { + /* update flash cache size increase fields as appropriate */ + if (cache_ptr->flash_size_increase_possible) { - switch ((cache_ptr->resize_ctl).flash_incr_mode) { - case H5C_flash_incr__off: - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, - "flash_size_increase_possible but H5C_flash_incr__off?!") - break; + switch ((cache_ptr->resize_ctl).flash_incr_mode) { + case H5C_flash_incr__off: + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, + "flash_size_increase_possible but H5C_flash_incr__off?!") + break; - case H5C_flash_incr__add_space: - cache_ptr->flash_size_increase_threshold = - (size_t)(((double)(cache_ptr->max_cache_size)) * - ((cache_ptr->resize_ctl).flash_threshold)); - break; + case H5C_flash_incr__add_space: + cache_ptr->flash_size_increase_threshold = + (size_t)(((double)(cache_ptr->max_cache_size)) * + ((cache_ptr->resize_ctl).flash_threshold)); + break; - default: /* should be unreachable */ - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Unknown flash_incr_mode?!?!?") - break; - } + default: /* should be unreachable */ + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Unknown flash_incr_mode?!?!?") + break; } } + } - if ((cache_ptr->resize_ctl).rpt_fcn != NULL) { - (*((cache_ptr->resize_ctl).rpt_fcn))(cache_ptr, H5C__CURR_AUTO_RESIZE_RPT_FCN_VER, hit_rate, - status, old_max_cache_size, new_max_cache_size, - old_min_clean_size, new_min_clean_size); - } + if ((cache_ptr->resize_ctl).rpt_fcn != NULL) { + (*((cache_ptr->resize_ctl).rpt_fcn))(cache_ptr, H5C__CURR_AUTO_RESIZE_RPT_FCN_VER, hit_rate, status, + old_max_cache_size, new_max_cache_size, old_min_clean_size, + new_min_clean_size); + } - if (H5C_reset_cache_hit_rate_stats(cache_ptr) < 0) - /* this should be impossible... */ - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "H5C_reset_cache_hit_rate_stats failed") + if (H5C_reset_cache_hit_rate_stats(cache_ptr) < 0) + /* this should be impossible... */ + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "H5C_reset_cache_hit_rate_stats failed") done: - /* Sanity checks */ - HDassert(cache_ptr->resize_in_progress); - if (!reentrant_call) - cache_ptr->resize_in_progress = FALSE; - HDassert((!reentrant_call) || (cache_ptr->resize_in_progress)); - - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__auto_adjust_cache_size() */ + /* Sanity checks */ + HDassert(cache_ptr->resize_in_progress); + if (!reentrant_call) + cache_ptr->resize_in_progress = FALSE; + HDassert((!reentrant_call) || (cache_ptr->resize_in_progress)); - /*------------------------------------------------------------------------- - * - * Function: H5C__autoadjust__ageout - * - * Purpose: Implement the ageout automatic cache size decrement - * algorithm. Note that while this code evicts aged out - * entries, the code does not change the maximum cache size. - * Instead, the function simply computes the new value (if - * any change is indicated) and reports this value in - * *new_max_cache_size_ptr. - * - * Return: Non-negative on success/Negative on failure or if there was - * an attempt to flush a protected item. - * - * - * Programmer: John Mainzer, 11/18/04 - * - *------------------------------------------------------------------------- - */ - static herr_t H5C__autoadjust__ageout(H5F_t * f, double hit_rate, enum H5C_resize_status *status_ptr, - size_t *new_max_cache_size_ptr, hbool_t write_permitted) - { - H5C_t *cache_ptr = f->shared->cache; - size_t test_size; - herr_t ret_value = SUCCEED; /* Return value */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C__auto_adjust_cache_size() */ - FUNC_ENTER_NOAPI_NOINIT +/*------------------------------------------------------------------------- + * + * Function: H5C__autoadjust__ageout + * + * Purpose: Implement the ageout automatic cache size decrement + * algorithm. Note that while this code evicts aged out + * entries, the code does not change the maximum cache size. + * Instead, the function simply computes the new value (if + * any change is indicated) and reports this value in + * *new_max_cache_size_ptr. + * + * Return: Non-negative on success/Negative on failure or if there was + * an attempt to flush a protected item. + * + * + * Programmer: John Mainzer, 11/18/04 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C__autoadjust__ageout(H5F_t *f, double hit_rate, enum H5C_resize_status *status_ptr, + size_t *new_max_cache_size_ptr, hbool_t write_permitted) +{ + H5C_t *cache_ptr = f->shared->cache; + size_t test_size; + herr_t ret_value = SUCCEED; /* Return value */ - HDassert(f); - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - HDassert((status_ptr) && (*status_ptr == in_spec)); - HDassert((new_max_cache_size_ptr) && (*new_max_cache_size_ptr == 0)); + FUNC_ENTER_NOAPI_NOINIT - /* remove excess epoch markers if any */ - if (cache_ptr->epoch_markers_active > (cache_ptr->resize_ctl).epochs_before_eviction) - if (H5C__autoadjust__ageout__remove_excess_markers(cache_ptr) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "can't remove excess epoch markers") + HDassert(f); + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert((status_ptr) && (*status_ptr == in_spec)); + HDassert((new_max_cache_size_ptr) && (*new_max_cache_size_ptr == 0)); - if (((cache_ptr->resize_ctl).decr_mode == H5C_decr__age_out) || - (((cache_ptr->resize_ctl).decr_mode == H5C_decr__age_out_with_threshold) && - (hit_rate >= (cache_ptr->resize_ctl).upper_hr_threshold))) { + /* remove excess epoch markers if any */ + if (cache_ptr->epoch_markers_active > (cache_ptr->resize_ctl).epochs_before_eviction) + if (H5C__autoadjust__ageout__remove_excess_markers(cache_ptr) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "can't remove excess epoch markers") - if (cache_ptr->max_cache_size > (cache_ptr->resize_ctl).min_size) { + if (((cache_ptr->resize_ctl).decr_mode == H5C_decr__age_out) || + (((cache_ptr->resize_ctl).decr_mode == H5C_decr__age_out_with_threshold) && + (hit_rate >= (cache_ptr->resize_ctl).upper_hr_threshold))) { - /* evict aged out cache entries if appropriate... */ - if (H5C__autoadjust__ageout__evict_aged_out_entries(f, write_permitted) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "error flushing aged out entries") + if (cache_ptr->max_cache_size > (cache_ptr->resize_ctl).min_size) { - /* ... and then reduce cache size if appropriate */ - if (cache_ptr->index_size < cache_ptr->max_cache_size) { + /* evict aged out cache entries if appropriate... */ + if (H5C__autoadjust__ageout__evict_aged_out_entries(f, write_permitted) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "error flushing aged out entries") - if ((cache_ptr->resize_ctl).apply_empty_reserve) { + /* ... and then reduce cache size if appropriate */ + if (cache_ptr->index_size < cache_ptr->max_cache_size) { - test_size = (size_t)(((double)cache_ptr->index_size) / - (1 - (cache_ptr->resize_ctl).empty_reserve)); + if ((cache_ptr->resize_ctl).apply_empty_reserve) { - if (test_size < cache_ptr->max_cache_size) { + test_size = (size_t)(((double)cache_ptr->index_size) / + (1 - (cache_ptr->resize_ctl).empty_reserve)); - *status_ptr = decrease; - *new_max_cache_size_ptr = test_size; - } - } - else { + if (test_size < cache_ptr->max_cache_size) { *status_ptr = decrease; - *new_max_cache_size_ptr = cache_ptr->index_size; + *new_max_cache_size_ptr = test_size; } + } + else { - if (*status_ptr == decrease) { + *status_ptr = decrease; + *new_max_cache_size_ptr = cache_ptr->index_size; + } - /* clip to min size if necessary */ - if (*new_max_cache_size_ptr < (cache_ptr->resize_ctl).min_size) { + if (*status_ptr == decrease) { - *new_max_cache_size_ptr = (cache_ptr->resize_ctl).min_size; - } + /* clip to min size if necessary */ + if (*new_max_cache_size_ptr < (cache_ptr->resize_ctl).min_size) { - /* clip to max decrement if necessary */ - if (((cache_ptr->resize_ctl).apply_max_decrement) && - (((cache_ptr->resize_ctl).max_decrement + *new_max_cache_size_ptr) < - cache_ptr->max_cache_size)) { + *new_max_cache_size_ptr = (cache_ptr->resize_ctl).min_size; + } - *new_max_cache_size_ptr = - cache_ptr->max_cache_size - (cache_ptr->resize_ctl).max_decrement; - } + /* clip to max decrement if necessary */ + if (((cache_ptr->resize_ctl).apply_max_decrement) && + (((cache_ptr->resize_ctl).max_decrement + *new_max_cache_size_ptr) < + cache_ptr->max_cache_size)) { + + *new_max_cache_size_ptr = + cache_ptr->max_cache_size - (cache_ptr->resize_ctl).max_decrement; } } } - else { + } + else { - *status_ptr = at_min_size; - } + *status_ptr = at_min_size; } + } done: - FUNC_LEAVE_NOAPI(ret_value) + FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__autoadjust__ageout() */ +} /* H5C__autoadjust__ageout() */ - /*------------------------------------------------------------------------- - * - * Function: H5C__autoadjust__ageout__cycle_epoch_marker - * - * Purpose: Remove the oldest epoch marker from the LRU list, - * and reinsert it at the head of the LRU list. Also - * remove the epoch marker's index from the head of the - * ring buffer, and re-insert it at the tail of the ring - * buffer. - * - * Return: SUCCEED on success/FAIL on failure. - * - * Programmer: John Mainzer, 11/22/04 - * - *------------------------------------------------------------------------- - */ - static herr_t H5C__autoadjust__ageout__cycle_epoch_marker(H5C_t * cache_ptr) - { - herr_t ret_value = SUCCEED; /* Return value */ - int i; +/*------------------------------------------------------------------------- + * + * Function: H5C__autoadjust__ageout__cycle_epoch_marker + * + * Purpose: Remove the oldest epoch marker from the LRU list, + * and reinsert it at the head of the LRU list. Also + * remove the epoch marker's index from the head of the + * ring buffer, and re-insert it at the tail of the ring + * buffer. + * + * Return: SUCCEED on success/FAIL on failure. + * + * Programmer: John Mainzer, 11/22/04 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C__autoadjust__ageout__cycle_epoch_marker(H5C_t *cache_ptr) +{ + herr_t ret_value = SUCCEED; /* Return value */ + int i; - FUNC_ENTER_NOAPI_NOINIT + FUNC_ENTER_NOAPI_NOINIT - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - if (cache_ptr->epoch_markers_active <= 0) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "No active epoch markers on entry?!?!?") + if (cache_ptr->epoch_markers_active <= 0) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "No active epoch markers on entry?!?!?") - /* remove the last marker from both the ring buffer and the LRU list */ + /* remove the last marker from both the ring buffer and the LRU list */ - i = cache_ptr->epoch_marker_ringbuf[cache_ptr->epoch_marker_ringbuf_first]; + i = cache_ptr->epoch_marker_ringbuf[cache_ptr->epoch_marker_ringbuf_first]; - cache_ptr->epoch_marker_ringbuf_first = - (cache_ptr->epoch_marker_ringbuf_first + 1) % (H5C__MAX_EPOCH_MARKERS + 1); + cache_ptr->epoch_marker_ringbuf_first = + (cache_ptr->epoch_marker_ringbuf_first + 1) % (H5C__MAX_EPOCH_MARKERS + 1); - cache_ptr->epoch_marker_ringbuf_size -= 1; + cache_ptr->epoch_marker_ringbuf_size -= 1; - if (cache_ptr->epoch_marker_ringbuf_size < 0) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "ring buffer underflow") - if ((cache_ptr->epoch_marker_active)[i] != TRUE) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unused marker in LRU?!?") + if (cache_ptr->epoch_marker_ringbuf_size < 0) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "ring buffer underflow") + if ((cache_ptr->epoch_marker_active)[i] != TRUE) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unused marker in LRU?!?") - H5C__DLL_REMOVE((&((cache_ptr->epoch_markers)[i])), (cache_ptr)->LRU_head_ptr, - (cache_ptr)->LRU_tail_ptr, (cache_ptr)->LRU_list_len, (cache_ptr)->LRU_list_size, - (FAIL)) + H5C__DLL_REMOVE((&((cache_ptr->epoch_markers)[i])), (cache_ptr)->LRU_head_ptr, (cache_ptr)->LRU_tail_ptr, + (cache_ptr)->LRU_list_len, (cache_ptr)->LRU_list_size, (FAIL)) - /* now, re-insert it at the head of the LRU list, and at the tail of - * the ring buffer. - */ + /* now, re-insert it at the head of the LRU list, and at the tail of + * the ring buffer. + */ - HDassert(((cache_ptr->epoch_markers)[i]).addr == (haddr_t)i); - HDassert(((cache_ptr->epoch_markers)[i]).next == NULL); - HDassert(((cache_ptr->epoch_markers)[i]).prev == NULL); + HDassert(((cache_ptr->epoch_markers)[i]).addr == (haddr_t)i); + HDassert(((cache_ptr->epoch_markers)[i]).next == NULL); + HDassert(((cache_ptr->epoch_markers)[i]).prev == NULL); - cache_ptr->epoch_marker_ringbuf_last = - (cache_ptr->epoch_marker_ringbuf_last + 1) % (H5C__MAX_EPOCH_MARKERS + 1); + cache_ptr->epoch_marker_ringbuf_last = + (cache_ptr->epoch_marker_ringbuf_last + 1) % (H5C__MAX_EPOCH_MARKERS + 1); - (cache_ptr->epoch_marker_ringbuf)[cache_ptr->epoch_marker_ringbuf_last] = i; + (cache_ptr->epoch_marker_ringbuf)[cache_ptr->epoch_marker_ringbuf_last] = i; - cache_ptr->epoch_marker_ringbuf_size += 1; + cache_ptr->epoch_marker_ringbuf_size += 1; - if (cache_ptr->epoch_marker_ringbuf_size > H5C__MAX_EPOCH_MARKERS) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "ring buffer overflow") + if (cache_ptr->epoch_marker_ringbuf_size > H5C__MAX_EPOCH_MARKERS) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "ring buffer overflow") - H5C__DLL_PREPEND((&((cache_ptr->epoch_markers)[i])), (cache_ptr)->LRU_head_ptr, - (cache_ptr)->LRU_tail_ptr, (cache_ptr)->LRU_list_len, (cache_ptr)->LRU_list_size, - (FAIL)) + H5C__DLL_PREPEND((&((cache_ptr->epoch_markers)[i])), (cache_ptr)->LRU_head_ptr, (cache_ptr)->LRU_tail_ptr, + (cache_ptr)->LRU_list_len, (cache_ptr)->LRU_list_size, (FAIL)) done: - FUNC_LEAVE_NOAPI(ret_value) + FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__autoadjust__ageout__cycle_epoch_marker() */ +} /* H5C__autoadjust__ageout__cycle_epoch_marker() */ - /*------------------------------------------------------------------------- - * - * Function: H5C__autoadjust__ageout__evict_aged_out_entries - * - * Purpose: Evict clean entries in the cache that haven't - * been accessed for at least - * (cache_ptr->resize_ctl).epochs_before_eviction epochs, - * and flush dirty entries that haven't been accessed for - * that amount of time. - * - * Depending on configuration, the function will either - * flush or evict all such entries, or all such entries it - * encounters until it has freed the maximum amount of space - * allowed under the maximum decrement. - * - * If we are running in parallel mode, writes may not be - * permitted. If so, the function simply skips any dirty - * entries it may encounter. - * - * The function makes no attempt to maintain the minimum - * clean size, as there is no guarantee that the cache size - * will be changed. - * - * If there is no cache size change, the minimum clean size - * constraint will be met through a combination of clean - * entries and free space in the cache. - * - * If there is a cache size reduction, the minimum clean size - * will be re-calculated, and will be enforced the next time - * we have to make space in the cache. - * - * Observe that this function cannot occasion a read. - * - * Return: Non-negative on success/Negative on failure. - * - * Programmer: John Mainzer, 11/22/04 - * - *------------------------------------------------------------------------- - */ - static herr_t H5C__autoadjust__ageout__evict_aged_out_entries(H5F_t * f, hbool_t write_permitted) - { - H5C_t *cache_ptr = f->shared->cache; - size_t eviction_size_limit; - size_t bytes_evicted = 0; - hbool_t prev_is_dirty = FALSE; - hbool_t restart_scan; - H5C_cache_entry_t *entry_ptr; - H5C_cache_entry_t *next_ptr; - H5C_cache_entry_t *prev_ptr; - herr_t ret_value = SUCCEED; /* Return value */ - - FUNC_ENTER_NOAPI_NOINIT - - HDassert(f); - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - - /* if there is a limit on the amount that the cache size can be decrease - * in any one round of the cache size reduction algorithm, load that - * limit into eviction_size_limit. Otherwise, set eviction_size_limit - * to the equivalent of infinity. The current size of the index will - * do nicely. - */ - if ((cache_ptr->resize_ctl).apply_max_decrement) { +/*------------------------------------------------------------------------- + * + * Function: H5C__autoadjust__ageout__evict_aged_out_entries + * + * Purpose: Evict clean entries in the cache that haven't + * been accessed for at least + * (cache_ptr->resize_ctl).epochs_before_eviction epochs, + * and flush dirty entries that haven't been accessed for + * that amount of time. + * + * Depending on configuration, the function will either + * flush or evict all such entries, or all such entries it + * encounters until it has freed the maximum amount of space + * allowed under the maximum decrement. + * + * If we are running in parallel mode, writes may not be + * permitted. If so, the function simply skips any dirty + * entries it may encounter. + * + * The function makes no attempt to maintain the minimum + * clean size, as there is no guarantee that the cache size + * will be changed. + * + * If there is no cache size change, the minimum clean size + * constraint will be met through a combination of clean + * entries and free space in the cache. + * + * If there is a cache size reduction, the minimum clean size + * will be re-calculated, and will be enforced the next time + * we have to make space in the cache. + * + * Observe that this function cannot occasion a read. + * + * Return: Non-negative on success/Negative on failure. + * + * Programmer: John Mainzer, 11/22/04 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C__autoadjust__ageout__evict_aged_out_entries(H5F_t *f, hbool_t write_permitted) +{ + H5C_t *cache_ptr = f->shared->cache; + size_t eviction_size_limit; + size_t bytes_evicted = 0; + hbool_t prev_is_dirty = FALSE; + hbool_t restart_scan; + H5C_cache_entry_t *entry_ptr; + H5C_cache_entry_t *next_ptr; + H5C_cache_entry_t *prev_ptr; + herr_t ret_value = SUCCEED; /* Return value */ - eviction_size_limit = (cache_ptr->resize_ctl).max_decrement; - } - else { + FUNC_ENTER_NOAPI_NOINIT - eviction_size_limit = cache_ptr->index_size; /* i.e. infinity */ - } + HDassert(f); + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - if (write_permitted) { + /* if there is a limit on the amount that the cache size can be decrease + * in any one round of the cache size reduction algorithm, load that + * limit into eviction_size_limit. Otherwise, set eviction_size_limit + * to the equivalent of infinity. The current size of the index will + * do nicely. + */ + if ((cache_ptr->resize_ctl).apply_max_decrement) { - restart_scan = FALSE; - entry_ptr = cache_ptr->LRU_tail_ptr; + eviction_size_limit = (cache_ptr->resize_ctl).max_decrement; + } + else { - while ((entry_ptr != NULL) && ((entry_ptr->type)->id != H5AC_EPOCH_MARKER_ID) && - (bytes_evicted < eviction_size_limit)) { - hbool_t skipping_entry = FALSE; + eviction_size_limit = cache_ptr->index_size; /* i.e. infinity */ + } - HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(!(entry_ptr->is_protected)); - HDassert(!(entry_ptr->is_read_only)); - HDassert((entry_ptr->ro_ref_count) == 0); + if (write_permitted) { - next_ptr = entry_ptr->next; - prev_ptr = entry_ptr->prev; + restart_scan = FALSE; + entry_ptr = cache_ptr->LRU_tail_ptr; - if (prev_ptr != NULL) - prev_is_dirty = prev_ptr->is_dirty; + while ((entry_ptr != NULL) && ((entry_ptr->type)->id != H5AC_EPOCH_MARKER_ID) && + (bytes_evicted < eviction_size_limit)) { + hbool_t skipping_entry = FALSE; - if (entry_ptr->is_dirty) { - HDassert(!entry_ptr->prefetched_dirty); + HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(!(entry_ptr->is_protected)); + HDassert(!(entry_ptr->is_read_only)); + HDassert((entry_ptr->ro_ref_count) == 0); - /* dirty corked entry is skipped */ - if (entry_ptr->tag_info && entry_ptr->tag_info->corked) - skipping_entry = TRUE; - else { - /* reset entries_removed_counter and - * last_entry_removed_ptr prior to the call to - * H5C__flush_single_entry() so that we can spot - * unexpected removals of entries from the cache, - * and set the restart_scan flag if proceeding - * would be likely to cause us to scan an entry - * that is no longer in the cache. - */ - cache_ptr->entries_removed_counter = 0; - cache_ptr->last_entry_removed_ptr = NULL; + next_ptr = entry_ptr->next; + prev_ptr = entry_ptr->prev; - if (H5C__flush_single_entry(f, entry_ptr, H5C__NO_FLAGS_SET) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush entry") + if (prev_ptr != NULL) + prev_is_dirty = prev_ptr->is_dirty; - if (cache_ptr->entries_removed_counter > 1 || - cache_ptr->last_entry_removed_ptr == prev_ptr) - restart_scan = TRUE; - } /* end else */ - } /* end if */ - else if (!entry_ptr->prefetched_dirty) { + if (entry_ptr->is_dirty) { + HDassert(!entry_ptr->prefetched_dirty); - bytes_evicted += entry_ptr->size; + /* dirty corked entry is skipped */ + if (entry_ptr->tag_info && entry_ptr->tag_info->corked) + skipping_entry = TRUE; + else { + /* reset entries_removed_counter and + * last_entry_removed_ptr prior to the call to + * H5C__flush_single_entry() so that we can spot + * unexpected removals of entries from the cache, + * and set the restart_scan flag if proceeding + * would be likely to cause us to scan an entry + * that is no longer in the cache. + */ + cache_ptr->entries_removed_counter = 0; + cache_ptr->last_entry_removed_ptr = NULL; - if (H5C__flush_single_entry(f, entry_ptr, - H5C__FLUSH_INVALIDATE_FLAG | - H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0) + if (H5C__flush_single_entry(f, entry_ptr, H5C__NO_FLAGS_SET) < 0) HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush entry") - } /* end else-if */ - else { - HDassert(!entry_ptr->is_dirty); - HDassert(entry_ptr->prefetched_dirty); - skipping_entry = TRUE; + if (cache_ptr->entries_removed_counter > 1 || + cache_ptr->last_entry_removed_ptr == prev_ptr) + restart_scan = TRUE; } /* end else */ + } /* end if */ + else if (!entry_ptr->prefetched_dirty) { - if (prev_ptr != NULL) { - if (skipping_entry) - entry_ptr = prev_ptr; - else if (restart_scan || (prev_ptr->is_dirty != prev_is_dirty) || - (prev_ptr->next != next_ptr) || (prev_ptr->is_protected) || - (prev_ptr->is_pinned)) { - /* Something has happened to the LRU -- start over - * from the tail. - */ - restart_scan = FALSE; - entry_ptr = cache_ptr->LRU_tail_ptr; + bytes_evicted += entry_ptr->size; - H5C__UPDATE_STATS_FOR_LRU_SCAN_RESTART(cache_ptr) - } /* end else-if */ - else - entry_ptr = prev_ptr; - } /* end if */ + if (H5C__flush_single_entry( + f, entry_ptr, H5C__FLUSH_INVALIDATE_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush entry") + } /* end else-if */ + else { + HDassert(!entry_ptr->is_dirty); + HDassert(entry_ptr->prefetched_dirty); + + skipping_entry = TRUE; + } /* end else */ + + if (prev_ptr != NULL) { + if (skipping_entry) + entry_ptr = prev_ptr; + else if (restart_scan || (prev_ptr->is_dirty != prev_is_dirty) || + (prev_ptr->next != next_ptr) || (prev_ptr->is_protected) || (prev_ptr->is_pinned)) { + /* Something has happened to the LRU -- start over + * from the tail. + */ + restart_scan = FALSE; + entry_ptr = cache_ptr->LRU_tail_ptr; + + H5C__UPDATE_STATS_FOR_LRU_SCAN_RESTART(cache_ptr) + } /* end else-if */ else - entry_ptr = NULL; - } /* end while */ + entry_ptr = prev_ptr; + } /* end if */ + else + entry_ptr = NULL; + } /* end while */ - /* for now at least, don't bother to maintain the minimum clean size, - * as the cache should now be less than its maximum size. Due to - * the vaguries of the cache size reduction algorithm, we may not - * reduce the size of the cache. - * - * If we do, we will calculate a new minimum clean size, which will - * be enforced the next time we try to make space in the cache. - * - * If we don't, no action is necessary, as we have just evicted and/or - * or flushed a bunch of entries and therefore the sum of the clean - * and free space in the cache must be greater than or equal to the - * min clean space requirement (assuming that requirement was met on - * entry). - */ + /* for now at least, don't bother to maintain the minimum clean size, + * as the cache should now be less than its maximum size. Due to + * the vaguries of the cache size reduction algorithm, we may not + * reduce the size of the cache. + * + * If we do, we will calculate a new minimum clean size, which will + * be enforced the next time we try to make space in the cache. + * + * If we don't, no action is necessary, as we have just evicted and/or + * or flushed a bunch of entries and therefore the sum of the clean + * and free space in the cache must be greater than or equal to the + * min clean space requirement (assuming that requirement was met on + * entry). + */ - } /* end if */ - else /* ! write_permitted */ { - /* Since we are not allowed to write, all we can do is evict - * any clean entries that we may encounter before we either - * hit the eviction size limit, or encounter the epoch marker. - * - * If we are operating read only, this isn't an issue, as there - * will not be any dirty entries. - * - * If we are operating in R/W mode, all the dirty entries we - * skip will be flushed the next time we attempt to make space - * when writes are permitted. This may have some local - * performance implications, but it shouldn't cause any net - * slowdown. - */ - HDassert(H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS); - entry_ptr = cache_ptr->LRU_tail_ptr; - while (entry_ptr != NULL && ((entry_ptr->type)->id != H5AC_EPOCH_MARKER_ID) && - (bytes_evicted < eviction_size_limit)) { - HDassert(!(entry_ptr->is_protected)); + } /* end if */ + else /* ! write_permitted */ { + /* Since we are not allowed to write, all we can do is evict + * any clean entries that we may encounter before we either + * hit the eviction size limit, or encounter the epoch marker. + * + * If we are operating read only, this isn't an issue, as there + * will not be any dirty entries. + * + * If we are operating in R/W mode, all the dirty entries we + * skip will be flushed the next time we attempt to make space + * when writes are permitted. This may have some local + * performance implications, but it shouldn't cause any net + * slowdown. + */ + HDassert(H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS); + entry_ptr = cache_ptr->LRU_tail_ptr; + while (entry_ptr != NULL && ((entry_ptr->type)->id != H5AC_EPOCH_MARKER_ID) && + (bytes_evicted < eviction_size_limit)) { + HDassert(!(entry_ptr->is_protected)); - prev_ptr = entry_ptr->prev; + prev_ptr = entry_ptr->prev; - if (!(entry_ptr->is_dirty) && !(entry_ptr->prefetched_dirty)) - if (H5C__flush_single_entry(f, entry_ptr, - H5C__FLUSH_INVALIDATE_FLAG | - H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush clean entry") - - /* just skip the entry if it is dirty, as we can't do - * anything with it now since we can't write. - * - * Since all entries are clean, serialize() will not be called, - * and thus we needn't test to see if the LRU has been changed - * out from under us. - */ - entry_ptr = prev_ptr; - } /* end while */ - } /* end else */ + if (!(entry_ptr->is_dirty) && !(entry_ptr->prefetched_dirty)) + if (H5C__flush_single_entry( + f, entry_ptr, H5C__FLUSH_INVALIDATE_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush clean entry") - if (cache_ptr->index_size < cache_ptr->max_cache_size) - cache_ptr->cache_full = FALSE; + /* just skip the entry if it is dirty, as we can't do + * anything with it now since we can't write. + * + * Since all entries are clean, serialize() will not be called, + * and thus we needn't test to see if the LRU has been changed + * out from under us. + */ + entry_ptr = prev_ptr; + } /* end while */ + } /* end else */ + + if (cache_ptr->index_size < cache_ptr->max_cache_size) + cache_ptr->cache_full = FALSE; done: - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__autoadjust__ageout__evict_aged_out_entries() */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C__autoadjust__ageout__evict_aged_out_entries() */ - /*------------------------------------------------------------------------- - * - * Function: H5C__autoadjust__ageout__insert_new_marker - * - * Purpose: Find an unused marker cache entry, mark it as used, and - * insert it at the head of the LRU list. Also add the - * marker's index in the epoch_markers array. - * - * Return: SUCCEED on success/FAIL on failure. - * - * Programmer: John Mainzer, 11/19/04 - * - *------------------------------------------------------------------------- - */ - static herr_t H5C__autoadjust__ageout__insert_new_marker(H5C_t * cache_ptr) - { - herr_t ret_value = SUCCEED; /* Return value */ - int i; +/*------------------------------------------------------------------------- + * + * Function: H5C__autoadjust__ageout__insert_new_marker + * + * Purpose: Find an unused marker cache entry, mark it as used, and + * insert it at the head of the LRU list. Also add the + * marker's index in the epoch_markers array. + * + * Return: SUCCEED on success/FAIL on failure. + * + * Programmer: John Mainzer, 11/19/04 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C__autoadjust__ageout__insert_new_marker(H5C_t *cache_ptr) +{ + herr_t ret_value = SUCCEED; /* Return value */ + int i; - FUNC_ENTER_NOAPI_NOINIT + FUNC_ENTER_NOAPI_NOINIT - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - if (cache_ptr->epoch_markers_active >= (cache_ptr->resize_ctl).epochs_before_eviction) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Already have a full complement of markers") + if (cache_ptr->epoch_markers_active >= (cache_ptr->resize_ctl).epochs_before_eviction) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Already have a full complement of markers") - /* find an unused marker */ - i = 0; - while ((cache_ptr->epoch_marker_active)[i] && i < H5C__MAX_EPOCH_MARKERS) - i++; + /* find an unused marker */ + i = 0; + while ((cache_ptr->epoch_marker_active)[i] && i < H5C__MAX_EPOCH_MARKERS) + i++; - if (i >= H5C__MAX_EPOCH_MARKERS) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Can't find unused marker") + if (i >= H5C__MAX_EPOCH_MARKERS) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Can't find unused marker") - HDassert(((cache_ptr->epoch_markers)[i]).addr == (haddr_t)i); - HDassert(((cache_ptr->epoch_markers)[i]).next == NULL); - HDassert(((cache_ptr->epoch_markers)[i]).prev == NULL); + HDassert(((cache_ptr->epoch_markers)[i]).addr == (haddr_t)i); + HDassert(((cache_ptr->epoch_markers)[i]).next == NULL); + HDassert(((cache_ptr->epoch_markers)[i]).prev == NULL); - (cache_ptr->epoch_marker_active)[i] = TRUE; + (cache_ptr->epoch_marker_active)[i] = TRUE; - cache_ptr->epoch_marker_ringbuf_last = - (cache_ptr->epoch_marker_ringbuf_last + 1) % (H5C__MAX_EPOCH_MARKERS + 1); + cache_ptr->epoch_marker_ringbuf_last = + (cache_ptr->epoch_marker_ringbuf_last + 1) % (H5C__MAX_EPOCH_MARKERS + 1); - (cache_ptr->epoch_marker_ringbuf)[cache_ptr->epoch_marker_ringbuf_last] = i; + (cache_ptr->epoch_marker_ringbuf)[cache_ptr->epoch_marker_ringbuf_last] = i; - cache_ptr->epoch_marker_ringbuf_size += 1; + cache_ptr->epoch_marker_ringbuf_size += 1; - if (cache_ptr->epoch_marker_ringbuf_size > H5C__MAX_EPOCH_MARKERS) { + if (cache_ptr->epoch_marker_ringbuf_size > H5C__MAX_EPOCH_MARKERS) { - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "ring buffer overflow") - } + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "ring buffer overflow") + } - H5C__DLL_PREPEND((&((cache_ptr->epoch_markers)[i])), (cache_ptr)->LRU_head_ptr, - (cache_ptr)->LRU_tail_ptr, (cache_ptr)->LRU_list_len, (cache_ptr)->LRU_list_size, - (FAIL)) + H5C__DLL_PREPEND((&((cache_ptr->epoch_markers)[i])), (cache_ptr)->LRU_head_ptr, (cache_ptr)->LRU_tail_ptr, + (cache_ptr)->LRU_list_len, (cache_ptr)->LRU_list_size, (FAIL)) - cache_ptr->epoch_markers_active += 1; + cache_ptr->epoch_markers_active += 1; done: - FUNC_LEAVE_NOAPI(ret_value) + FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__autoadjust__ageout__insert_new_marker() */ +} /* H5C__autoadjust__ageout__insert_new_marker() */ - /*------------------------------------------------------------------------- - * - * Function: H5C__autoadjust__ageout__remove_all_markers - * - * Purpose: Remove all epoch markers from the LRU list and mark them - * as inactive. - * - * Return: SUCCEED on success/FAIL on failure. - * - * Programmer: John Mainzer, 11/22/04 - * - *------------------------------------------------------------------------- - */ - static herr_t H5C__autoadjust__ageout__remove_all_markers(H5C_t * cache_ptr) - { - herr_t ret_value = SUCCEED; /* Return value */ - int i; - int ring_buf_index; +/*------------------------------------------------------------------------- + * + * Function: H5C__autoadjust__ageout__remove_all_markers + * + * Purpose: Remove all epoch markers from the LRU list and mark them + * as inactive. + * + * Return: SUCCEED on success/FAIL on failure. + * + * Programmer: John Mainzer, 11/22/04 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C__autoadjust__ageout__remove_all_markers(H5C_t *cache_ptr) +{ + herr_t ret_value = SUCCEED; /* Return value */ + int i; + int ring_buf_index; - FUNC_ENTER_NOAPI_NOINIT + FUNC_ENTER_NOAPI_NOINIT - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - while (cache_ptr->epoch_markers_active > 0) { - /* get the index of the last epoch marker in the LRU list - * and remove it from the ring buffer. - */ + while (cache_ptr->epoch_markers_active > 0) { + /* get the index of the last epoch marker in the LRU list + * and remove it from the ring buffer. + */ - ring_buf_index = cache_ptr->epoch_marker_ringbuf_first; - i = (cache_ptr->epoch_marker_ringbuf)[ring_buf_index]; + ring_buf_index = cache_ptr->epoch_marker_ringbuf_first; + i = (cache_ptr->epoch_marker_ringbuf)[ring_buf_index]; - cache_ptr->epoch_marker_ringbuf_first = - (cache_ptr->epoch_marker_ringbuf_first + 1) % (H5C__MAX_EPOCH_MARKERS + 1); + cache_ptr->epoch_marker_ringbuf_first = + (cache_ptr->epoch_marker_ringbuf_first + 1) % (H5C__MAX_EPOCH_MARKERS + 1); - cache_ptr->epoch_marker_ringbuf_size -= 1; + cache_ptr->epoch_marker_ringbuf_size -= 1; - if (cache_ptr->epoch_marker_ringbuf_size < 0) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "ring buffer underflow") + if (cache_ptr->epoch_marker_ringbuf_size < 0) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "ring buffer underflow") - if ((cache_ptr->epoch_marker_active)[i] != TRUE) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unused marker in LRU?!?") + if ((cache_ptr->epoch_marker_active)[i] != TRUE) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unused marker in LRU?!?") - /* remove the epoch marker from the LRU list */ - H5C__DLL_REMOVE((&((cache_ptr->epoch_markers)[i])), (cache_ptr)->LRU_head_ptr, - (cache_ptr)->LRU_tail_ptr, (cache_ptr)->LRU_list_len, (cache_ptr)->LRU_list_size, - (FAIL)) + /* remove the epoch marker from the LRU list */ + H5C__DLL_REMOVE((&((cache_ptr->epoch_markers)[i])), (cache_ptr)->LRU_head_ptr, + (cache_ptr)->LRU_tail_ptr, (cache_ptr)->LRU_list_len, (cache_ptr)->LRU_list_size, + (FAIL)) - /* mark the epoch marker as unused. */ - (cache_ptr->epoch_marker_active)[i] = FALSE; + /* mark the epoch marker as unused. */ + (cache_ptr->epoch_marker_active)[i] = FALSE; - HDassert(((cache_ptr->epoch_markers)[i]).addr == (haddr_t)i); - HDassert(((cache_ptr->epoch_markers)[i]).next == NULL); - HDassert(((cache_ptr->epoch_markers)[i]).prev == NULL); + HDassert(((cache_ptr->epoch_markers)[i]).addr == (haddr_t)i); + HDassert(((cache_ptr->epoch_markers)[i]).next == NULL); + HDassert(((cache_ptr->epoch_markers)[i]).prev == NULL); - /* decrement the number of active epoch markers */ - cache_ptr->epoch_markers_active -= 1; + /* decrement the number of active epoch markers */ + cache_ptr->epoch_markers_active -= 1; - HDassert(cache_ptr->epoch_markers_active == cache_ptr->epoch_marker_ringbuf_size); - } + HDassert(cache_ptr->epoch_markers_active == cache_ptr->epoch_marker_ringbuf_size); + } done: - FUNC_LEAVE_NOAPI(ret_value) + FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__autoadjust__ageout__remove_all_markers() */ +} /* H5C__autoadjust__ageout__remove_all_markers() */ - /*------------------------------------------------------------------------- - * - * Function: H5C__autoadjust__ageout__remove_excess_markers - * - * Purpose: Remove epoch markers from the end of the LRU list and - * mark them as inactive until the number of active markers - * equals the the current value of - * (cache_ptr->resize_ctl).epochs_before_eviction. - * - * Return: SUCCEED on success/FAIL on failure. - * - * Programmer: John Mainzer, 11/19/04 - * - *------------------------------------------------------------------------- - */ - static herr_t H5C__autoadjust__ageout__remove_excess_markers(H5C_t * cache_ptr) - { - herr_t ret_value = SUCCEED; /* Return value */ - int i; - int ring_buf_index; +/*------------------------------------------------------------------------- + * + * Function: H5C__autoadjust__ageout__remove_excess_markers + * + * Purpose: Remove epoch markers from the end of the LRU list and + * mark them as inactive until the number of active markers + * equals the the current value of + * (cache_ptr->resize_ctl).epochs_before_eviction. + * + * Return: SUCCEED on success/FAIL on failure. + * + * Programmer: John Mainzer, 11/19/04 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C__autoadjust__ageout__remove_excess_markers(H5C_t *cache_ptr) +{ + herr_t ret_value = SUCCEED; /* Return value */ + int i; + int ring_buf_index; - FUNC_ENTER_NOAPI_NOINIT + FUNC_ENTER_NOAPI_NOINIT - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - if (cache_ptr->epoch_markers_active <= (cache_ptr->resize_ctl).epochs_before_eviction) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "no excess markers on entry") + if (cache_ptr->epoch_markers_active <= (cache_ptr->resize_ctl).epochs_before_eviction) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "no excess markers on entry") - while (cache_ptr->epoch_markers_active > (cache_ptr->resize_ctl).epochs_before_eviction) { - /* get the index of the last epoch marker in the LRU list - * and remove it from the ring buffer. - */ + while (cache_ptr->epoch_markers_active > (cache_ptr->resize_ctl).epochs_before_eviction) { + /* get the index of the last epoch marker in the LRU list + * and remove it from the ring buffer. + */ - ring_buf_index = cache_ptr->epoch_marker_ringbuf_first; - i = (cache_ptr->epoch_marker_ringbuf)[ring_buf_index]; + ring_buf_index = cache_ptr->epoch_marker_ringbuf_first; + i = (cache_ptr->epoch_marker_ringbuf)[ring_buf_index]; - cache_ptr->epoch_marker_ringbuf_first = - (cache_ptr->epoch_marker_ringbuf_first + 1) % (H5C__MAX_EPOCH_MARKERS + 1); + cache_ptr->epoch_marker_ringbuf_first = + (cache_ptr->epoch_marker_ringbuf_first + 1) % (H5C__MAX_EPOCH_MARKERS + 1); - cache_ptr->epoch_marker_ringbuf_size -= 1; + cache_ptr->epoch_marker_ringbuf_size -= 1; - if (cache_ptr->epoch_marker_ringbuf_size < 0) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "ring buffer underflow") - if ((cache_ptr->epoch_marker_active)[i] != TRUE) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unused marker in LRU?!?") + if (cache_ptr->epoch_marker_ringbuf_size < 0) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "ring buffer underflow") + if ((cache_ptr->epoch_marker_active)[i] != TRUE) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unused marker in LRU?!?") - /* remove the epoch marker from the LRU list */ - H5C__DLL_REMOVE((&((cache_ptr->epoch_markers)[i])), (cache_ptr)->LRU_head_ptr, - (cache_ptr)->LRU_tail_ptr, (cache_ptr)->LRU_list_len, (cache_ptr)->LRU_list_size, - (FAIL)) + /* remove the epoch marker from the LRU list */ + H5C__DLL_REMOVE((&((cache_ptr->epoch_markers)[i])), (cache_ptr)->LRU_head_ptr, + (cache_ptr)->LRU_tail_ptr, (cache_ptr)->LRU_list_len, (cache_ptr)->LRU_list_size, + (FAIL)) - /* mark the epoch marker as unused. */ - (cache_ptr->epoch_marker_active)[i] = FALSE; + /* mark the epoch marker as unused. */ + (cache_ptr->epoch_marker_active)[i] = FALSE; - HDassert(((cache_ptr->epoch_markers)[i]).addr == (haddr_t)i); - HDassert(((cache_ptr->epoch_markers)[i]).next == NULL); - HDassert(((cache_ptr->epoch_markers)[i]).prev == NULL); + HDassert(((cache_ptr->epoch_markers)[i]).addr == (haddr_t)i); + HDassert(((cache_ptr->epoch_markers)[i]).next == NULL); + HDassert(((cache_ptr->epoch_markers)[i]).prev == NULL); - /* decrement the number of active epoch markers */ - cache_ptr->epoch_markers_active -= 1; + /* decrement the number of active epoch markers */ + cache_ptr->epoch_markers_active -= 1; - HDassert(cache_ptr->epoch_markers_active == cache_ptr->epoch_marker_ringbuf_size); - } + HDassert(cache_ptr->epoch_markers_active == cache_ptr->epoch_marker_ringbuf_size); + } done: - FUNC_LEAVE_NOAPI(ret_value) + FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__autoadjust__ageout__remove_excess_markers() */ +} /* H5C__autoadjust__ageout__remove_excess_markers() */ - /*------------------------------------------------------------------------- - * - * Function: H5C__flash_increase_cache_size - * - * Purpose: If there is not at least new_entry_size - old_entry_size - * bytes of free space in the cache and the current - * max_cache_size is less than (cache_ptr->resize_ctl).max_size, - * perform a flash increase in the cache size and then reset - * the full cache hit rate statistics, and exit. - * - * Return: Non-negative on success/Negative on failure. - * - * Programmer: John Mainzer, 12/31/07 - * - *------------------------------------------------------------------------- - */ - static herr_t H5C__flash_increase_cache_size(H5C_t * cache_ptr, size_t old_entry_size, - size_t new_entry_size) - { - size_t new_max_cache_size = 0; - size_t old_max_cache_size = 0; - size_t new_min_clean_size = 0; - size_t old_min_clean_size = 0; - size_t space_needed; - enum H5C_resize_status status = flash_increase; /* may change */ - double hit_rate; - herr_t ret_value = SUCCEED; /* Return value */ - - FUNC_ENTER_NOAPI_NOINIT - - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - HDassert(cache_ptr->flash_size_increase_possible); - HDassert(new_entry_size > cache_ptr->flash_size_increase_threshold); - HDassert(old_entry_size < new_entry_size); +/*------------------------------------------------------------------------- + * + * Function: H5C__flash_increase_cache_size + * + * Purpose: If there is not at least new_entry_size - old_entry_size + * bytes of free space in the cache and the current + * max_cache_size is less than (cache_ptr->resize_ctl).max_size, + * perform a flash increase in the cache size and then reset + * the full cache hit rate statistics, and exit. + * + * Return: Non-negative on success/Negative on failure. + * + * Programmer: John Mainzer, 12/31/07 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C__flash_increase_cache_size(H5C_t *cache_ptr, size_t old_entry_size, size_t new_entry_size) +{ + size_t new_max_cache_size = 0; + size_t old_max_cache_size = 0; + size_t new_min_clean_size = 0; + size_t old_min_clean_size = 0; + size_t space_needed; + enum H5C_resize_status status = flash_increase; /* may change */ + double hit_rate; + herr_t ret_value = SUCCEED; /* Return value */ - if (old_entry_size >= new_entry_size) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "old_entry_size >= new_entry_size") + FUNC_ENTER_NOAPI_NOINIT - space_needed = new_entry_size - old_entry_size; + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(cache_ptr->flash_size_increase_possible); + HDassert(new_entry_size > cache_ptr->flash_size_increase_threshold); + HDassert(old_entry_size < new_entry_size); - if (((cache_ptr->index_size + space_needed) > cache_ptr->max_cache_size) && - (cache_ptr->max_cache_size < (cache_ptr->resize_ctl).max_size)) { + if (old_entry_size >= new_entry_size) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "old_entry_size >= new_entry_size") - /* we have work to do */ + space_needed = new_entry_size - old_entry_size; - switch ((cache_ptr->resize_ctl).flash_incr_mode) { - case H5C_flash_incr__off: - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, - "flash_size_increase_possible but H5C_flash_incr__off?!") - break; + if (((cache_ptr->index_size + space_needed) > cache_ptr->max_cache_size) && + (cache_ptr->max_cache_size < (cache_ptr->resize_ctl).max_size)) { - case H5C_flash_incr__add_space: - if (cache_ptr->index_size < cache_ptr->max_cache_size) { + /* we have work to do */ - HDassert((cache_ptr->max_cache_size - cache_ptr->index_size) < space_needed); - space_needed -= cache_ptr->max_cache_size - cache_ptr->index_size; - } - space_needed = (size_t)(((double)space_needed) * (cache_ptr->resize_ctl).flash_multiple); + switch ((cache_ptr->resize_ctl).flash_incr_mode) { + case H5C_flash_incr__off: + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, + "flash_size_increase_possible but H5C_flash_incr__off?!") + break; - new_max_cache_size = cache_ptr->max_cache_size + space_needed; + case H5C_flash_incr__add_space: + if (cache_ptr->index_size < cache_ptr->max_cache_size) { - break; + HDassert((cache_ptr->max_cache_size - cache_ptr->index_size) < space_needed); + space_needed -= cache_ptr->max_cache_size - cache_ptr->index_size; + } + space_needed = (size_t)(((double)space_needed) * (cache_ptr->resize_ctl).flash_multiple); - default: /* should be unreachable */ - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Unknown flash_incr_mode?!?!?") - break; - } + new_max_cache_size = cache_ptr->max_cache_size + space_needed; - if (new_max_cache_size > (cache_ptr->resize_ctl).max_size) { + break; - new_max_cache_size = (cache_ptr->resize_ctl).max_size; - } + default: /* should be unreachable */ + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Unknown flash_incr_mode?!?!?") + break; + } - HDassert(new_max_cache_size > cache_ptr->max_cache_size); + if (new_max_cache_size > (cache_ptr->resize_ctl).max_size) { - new_min_clean_size = - (size_t)((double)new_max_cache_size * ((cache_ptr->resize_ctl).min_clean_fraction)); + new_max_cache_size = (cache_ptr->resize_ctl).max_size; + } - HDassert(new_min_clean_size <= new_max_cache_size); + HDassert(new_max_cache_size > cache_ptr->max_cache_size); - old_max_cache_size = cache_ptr->max_cache_size; - old_min_clean_size = cache_ptr->min_clean_size; + new_min_clean_size = + (size_t)((double)new_max_cache_size * ((cache_ptr->resize_ctl).min_clean_fraction)); - cache_ptr->max_cache_size = new_max_cache_size; - cache_ptr->min_clean_size = new_min_clean_size; + HDassert(new_min_clean_size <= new_max_cache_size); - /* update flash cache size increase fields as appropriate */ - HDassert(cache_ptr->flash_size_increase_possible); + old_max_cache_size = cache_ptr->max_cache_size; + old_min_clean_size = cache_ptr->min_clean_size; - switch ((cache_ptr->resize_ctl).flash_incr_mode) { - case H5C_flash_incr__off: - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, - "flash_size_increase_possible but H5C_flash_incr__off?!") - break; + cache_ptr->max_cache_size = new_max_cache_size; + cache_ptr->min_clean_size = new_min_clean_size; - case H5C_flash_incr__add_space: - cache_ptr->flash_size_increase_threshold = - (size_t)(((double)(cache_ptr->max_cache_size)) * - ((cache_ptr->resize_ctl).flash_threshold)); - break; + /* update flash cache size increase fields as appropriate */ + HDassert(cache_ptr->flash_size_increase_possible); - default: /* should be unreachable */ - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Unknown flash_incr_mode?!?!?") - break; - } + switch ((cache_ptr->resize_ctl).flash_incr_mode) { + case H5C_flash_incr__off: + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, + "flash_size_increase_possible but H5C_flash_incr__off?!") + break; - /* note that we don't cycle the epoch markers. We can - * argue either way as to whether we should, but for now - * we don't. - */ + case H5C_flash_incr__add_space: + cache_ptr->flash_size_increase_threshold = + (size_t)(((double)(cache_ptr->max_cache_size)) * + ((cache_ptr->resize_ctl).flash_threshold)); + break; - if ((cache_ptr->resize_ctl).rpt_fcn != NULL) { + default: /* should be unreachable */ + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Unknown flash_incr_mode?!?!?") + break; + } - /* get the hit rate for the reporting function. Should still - * be good as we haven't reset the hit rate statistics. - */ - if (H5C_get_cache_hit_rate(cache_ptr, &hit_rate) != SUCCEED) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Can't get hit rate") + /* note that we don't cycle the epoch markers. We can + * argue either way as to whether we should, but for now + * we don't. + */ - (*((cache_ptr->resize_ctl).rpt_fcn))(cache_ptr, H5C__CURR_AUTO_RESIZE_RPT_FCN_VER, hit_rate, - status, old_max_cache_size, new_max_cache_size, - old_min_clean_size, new_min_clean_size); - } + if ((cache_ptr->resize_ctl).rpt_fcn != NULL) { + + /* get the hit rate for the reporting function. Should still + * be good as we haven't reset the hit rate statistics. + */ + if (H5C_get_cache_hit_rate(cache_ptr, &hit_rate) != SUCCEED) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Can't get hit rate") - if (H5C_reset_cache_hit_rate_stats(cache_ptr) < 0) - /* this should be impossible... */ - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "H5C_reset_cache_hit_rate_stats failed") + (*((cache_ptr->resize_ctl).rpt_fcn))(cache_ptr, H5C__CURR_AUTO_RESIZE_RPT_FCN_VER, hit_rate, + status, old_max_cache_size, new_max_cache_size, + old_min_clean_size, new_min_clean_size); } + if (H5C_reset_cache_hit_rate_stats(cache_ptr) < 0) + /* this should be impossible... */ + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "H5C_reset_cache_hit_rate_stats failed") + } + done: - FUNC_LEAVE_NOAPI(ret_value) + FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__flash_increase_cache_size() */ +} /* H5C__flash_increase_cache_size() */ - /*------------------------------------------------------------------------- - * Function: H5C__flush_invalidate_cache - * - * Purpose: Flush and destroy the entries contained in the target - * cache. - * - * If the cache contains protected entries, the function will - * fail, as protected entries cannot be either flushed or - * destroyed. However all unprotected entries should be - * flushed and destroyed before the function returns failure. - * - * While pinned entries can usually be flushed, they cannot - * be destroyed. However, they should be unpinned when all - * the entries that reference them have been destroyed (thus - * reduding the pinned entry's reference count to 0, allowing - * it to be unpinned). - * - * If pinned entries are present, the function makes repeated - * passes through the cache, flushing all dirty entries - * (including the pinned dirty entries where permitted) and - * destroying all unpinned entries. This process is repeated - * until either the cache is empty, or the number of pinned - * entries stops decreasing on each pass. - * - * Return: Non-negative on success/Negative on failure or if there was - * a request to flush all items and something was protected. - * - * Programmer: John Mainzer - * 3/24/065 - * - * Modifications: - * - * To support the fractal heap, the cache must now deal with - * entries being dirtied, resized, and/or renamed inside - * flush callbacks. Updated function to support this. - * - * -- JRM 8/27/06 - * - * Added code to detect and manage the case in which a - * flush callback changes the s-list out from under - * the function. The only way I can think of in which this - * can happen is if a flush function loads an entry - * into the cache that isn't there already. Quincey tells - * me that this will never happen, but I'm not sure I - * believe him. - * - * Note that this is a pretty bad scenario if it ever - * happens. The code I have added should allow us to - * handle the situation under all but the worst conditions, - * but one can argue that we should just scream and die if - * we ever detect the condition. - * - * -- JRM 10/13/07 - * - * Missing entries? - * - * - * Added support for the H5C__EVICT_ALLOW_LAST_PINS_FLAG. - * This flag is used to flush and evict all entries in - * the metadata cache that are not pinned -- typically, - * everything other than the superblock. - * - * ??? -- ??/??/?? - * - * Added sanity checks to verify that the skip list is - * enabled on entry. On the face of it, it would make - * sense to enable the slist on entry, and disable it - * on exit, as this function is not called repeatedly. - * However, since this function can be called from - * H5C_flush_cache(), this would create cases in the test - * code where we would have to check the flags to determine - * whether we must setup and take down the slist. - * - * JRM -- 5/5/20 - * - *------------------------------------------------------------------------- - */ - static herr_t H5C__flush_invalidate_cache(H5F_t * f, unsigned flags) - { - H5C_t *cache_ptr; - H5C_ring_t ring; - herr_t ret_value = SUCCEED; +/*------------------------------------------------------------------------- + * Function: H5C__flush_invalidate_cache + * + * Purpose: Flush and destroy the entries contained in the target + * cache. + * + * If the cache contains protected entries, the function will + * fail, as protected entries cannot be either flushed or + * destroyed. However all unprotected entries should be + * flushed and destroyed before the function returns failure. + * + * While pinned entries can usually be flushed, they cannot + * be destroyed. However, they should be unpinned when all + * the entries that reference them have been destroyed (thus + * reduding the pinned entry's reference count to 0, allowing + * it to be unpinned). + * + * If pinned entries are present, the function makes repeated + * passes through the cache, flushing all dirty entries + * (including the pinned dirty entries where permitted) and + * destroying all unpinned entries. This process is repeated + * until either the cache is empty, or the number of pinned + * entries stops decreasing on each pass. + * + * Return: Non-negative on success/Negative on failure or if there was + * a request to flush all items and something was protected. + * + * Programmer: John Mainzer + * 3/24/065 + * + * Modifications: + * + * To support the fractal heap, the cache must now deal with + * entries being dirtied, resized, and/or renamed inside + * flush callbacks. Updated function to support this. + * + * -- JRM 8/27/06 + * + * Added code to detect and manage the case in which a + * flush callback changes the s-list out from under + * the function. The only way I can think of in which this + * can happen is if a flush function loads an entry + * into the cache that isn't there already. Quincey tells + * me that this will never happen, but I'm not sure I + * believe him. + * + * Note that this is a pretty bad scenario if it ever + * happens. The code I have added should allow us to + * handle the situation under all but the worst conditions, + * but one can argue that we should just scream and die if + * we ever detect the condition. + * + * -- JRM 10/13/07 + * + * Missing entries? + * + * + * Added support for the H5C__EVICT_ALLOW_LAST_PINS_FLAG. + * This flag is used to flush and evict all entries in + * the metadata cache that are not pinned -- typically, + * everything other than the superblock. + * + * ??? -- ??/??/?? + * + * Added sanity checks to verify that the skip list is + * enabled on entry. On the face of it, it would make + * sense to enable the slist on entry, and disable it + * on exit, as this function is not called repeatedly. + * However, since this function can be called from + * H5C_flush_cache(), this would create cases in the test + * code where we would have to check the flags to determine + * whether we must setup and take down the slist. + * + * JRM -- 5/5/20 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C__flush_invalidate_cache(H5F_t *f, unsigned flags) +{ + H5C_t *cache_ptr; + H5C_ring_t ring; + herr_t ret_value = SUCCEED; - FUNC_ENTER_STATIC + FUNC_ENTER_STATIC - HDassert(f); - HDassert(f->shared); - cache_ptr = f->shared->cache; - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - HDassert(cache_ptr->slist_ptr); - HDassert(cache_ptr->slist_enabled); + HDassert(f); + HDassert(f->shared); + cache_ptr = f->shared->cache; + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(cache_ptr->slist_ptr); + HDassert(cache_ptr->slist_enabled); #if H5C_DO_SANITY_CHECKS - { - int32_t i; - uint32_t index_len = 0; - uint32_t slist_len = 0; - size_t index_size = (size_t)0; - size_t clean_index_size = (size_t)0; - size_t dirty_index_size = (size_t)0; - size_t slist_size = (size_t)0; - - HDassert(cache_ptr->index_ring_len[H5C_RING_UNDEFINED] == 0); - HDassert(cache_ptr->index_ring_size[H5C_RING_UNDEFINED] == (size_t)0); - HDassert(cache_ptr->clean_index_ring_size[H5C_RING_UNDEFINED] == (size_t)0); - HDassert(cache_ptr->dirty_index_ring_size[H5C_RING_UNDEFINED] == (size_t)0); - HDassert(cache_ptr->slist_ring_len[H5C_RING_UNDEFINED] == 0); - HDassert(cache_ptr->slist_ring_size[H5C_RING_UNDEFINED] == (size_t)0); - - for (i = H5C_RING_USER; i < H5C_RING_NTYPES; i++) { - - index_len += cache_ptr->index_ring_len[i]; - index_size += cache_ptr->index_ring_size[i]; - clean_index_size += cache_ptr->clean_index_ring_size[i]; - dirty_index_size += cache_ptr->dirty_index_ring_size[i]; - - slist_len += cache_ptr->slist_ring_len[i]; - slist_size += cache_ptr->slist_ring_size[i]; - - } /* end for */ - - HDassert(cache_ptr->index_len == index_len); - HDassert(cache_ptr->index_size == index_size); - HDassert(cache_ptr->clean_index_size == clean_index_size); - HDassert(cache_ptr->dirty_index_size == dirty_index_size); - HDassert(cache_ptr->slist_len == slist_len); - HDassert(cache_ptr->slist_size == slist_size); - } + { + int32_t i; + uint32_t index_len = 0; + uint32_t slist_len = 0; + size_t index_size = (size_t)0; + size_t clean_index_size = (size_t)0; + size_t dirty_index_size = (size_t)0; + size_t slist_size = (size_t)0; + + HDassert(cache_ptr->index_ring_len[H5C_RING_UNDEFINED] == 0); + HDassert(cache_ptr->index_ring_size[H5C_RING_UNDEFINED] == (size_t)0); + HDassert(cache_ptr->clean_index_ring_size[H5C_RING_UNDEFINED] == (size_t)0); + HDassert(cache_ptr->dirty_index_ring_size[H5C_RING_UNDEFINED] == (size_t)0); + HDassert(cache_ptr->slist_ring_len[H5C_RING_UNDEFINED] == 0); + HDassert(cache_ptr->slist_ring_size[H5C_RING_UNDEFINED] == (size_t)0); + + for (i = H5C_RING_USER; i < H5C_RING_NTYPES; i++) { + + index_len += cache_ptr->index_ring_len[i]; + index_size += cache_ptr->index_ring_size[i]; + clean_index_size += cache_ptr->clean_index_ring_size[i]; + dirty_index_size += cache_ptr->dirty_index_ring_size[i]; + + slist_len += cache_ptr->slist_ring_len[i]; + slist_size += cache_ptr->slist_ring_size[i]; + + } /* end for */ + + HDassert(cache_ptr->index_len == index_len); + HDassert(cache_ptr->index_size == index_size); + HDassert(cache_ptr->clean_index_size == clean_index_size); + HDassert(cache_ptr->dirty_index_size == dirty_index_size); + HDassert(cache_ptr->slist_len == slist_len); + HDassert(cache_ptr->slist_size == slist_size); + } #endif /* H5C_DO_SANITY_CHECKS */ - /* remove ageout markers if present */ - if (cache_ptr->epoch_markers_active > 0) { + /* remove ageout markers if present */ + if (cache_ptr->epoch_markers_active > 0) { - if (H5C__autoadjust__ageout__remove_all_markers(cache_ptr) < 0) + if (H5C__autoadjust__ageout__remove_all_markers(cache_ptr) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "error removing all epoch markers") - } + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "error removing all epoch markers") + } - /* flush invalidate each ring, starting from the outermost ring and - * working inward. - */ - ring = H5C_RING_USER; + /* flush invalidate each ring, starting from the outermost ring and + * working inward. + */ + ring = H5C_RING_USER; - while (ring < H5C_RING_NTYPES) { + while (ring < H5C_RING_NTYPES) { - if (H5C_flush_invalidate_ring(f, ring, flags) < 0) + if (H5C_flush_invalidate_ring(f, ring, flags) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "flush invalidate ring failed") - ring++; + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "flush invalidate ring failed") + ring++; - } /* end while */ + } /* end while */ - /* Invariants, after destroying all entries in the hash table */ - if (!(flags & H5C__EVICT_ALLOW_LAST_PINS_FLAG)) { + /* Invariants, after destroying all entries in the hash table */ + if (!(flags & H5C__EVICT_ALLOW_LAST_PINS_FLAG)) { - HDassert(cache_ptr->index_size == 0); - HDassert(cache_ptr->clean_index_size == 0); - HDassert(cache_ptr->pel_len == 0); - HDassert(cache_ptr->pel_size == 0); + HDassert(cache_ptr->index_size == 0); + HDassert(cache_ptr->clean_index_size == 0); + HDassert(cache_ptr->pel_len == 0); + HDassert(cache_ptr->pel_size == 0); - } /* end if */ - else { + } /* end if */ + else { - H5C_cache_entry_t *entry_ptr; /* Cache entry */ - unsigned u; /* Local index variable */ + H5C_cache_entry_t *entry_ptr; /* Cache entry */ + unsigned u; /* Local index variable */ - /* All rings except ring 4 should be empty now */ - /* (Ring 4 has the superblock) */ - for (u = H5C_RING_USER; u < H5C_RING_SB; u++) { + /* All rings except ring 4 should be empty now */ + /* (Ring 4 has the superblock) */ + for (u = H5C_RING_USER; u < H5C_RING_SB; u++) { - HDassert(cache_ptr->index_ring_len[u] == 0); - HDassert(cache_ptr->index_ring_size[u] == 0); - HDassert(cache_ptr->clean_index_ring_size[u] == 0); + HDassert(cache_ptr->index_ring_len[u] == 0); + HDassert(cache_ptr->index_ring_size[u] == 0); + HDassert(cache_ptr->clean_index_ring_size[u] == 0); - } /* end for */ + } /* end for */ - /* Check that any remaining pinned entries are in the superblock ring */ + /* Check that any remaining pinned entries are in the superblock ring */ - entry_ptr = cache_ptr->pel_head_ptr; + entry_ptr = cache_ptr->pel_head_ptr; - while (entry_ptr) { + while (entry_ptr) { - /* Check ring */ - HDassert(entry_ptr->ring == H5C_RING_SB); + /* Check ring */ + HDassert(entry_ptr->ring == H5C_RING_SB); - /* Advance to next entry in pinned entry list */ - entry_ptr = entry_ptr->next; + /* Advance to next entry in pinned entry list */ + entry_ptr = entry_ptr->next; - } /* end while */ - } /* end else */ + } /* end while */ + } /* end else */ - HDassert(cache_ptr->dirty_index_size == 0); - HDassert(cache_ptr->slist_len == 0); - HDassert(cache_ptr->slist_size == 0); - HDassert(cache_ptr->pl_len == 0); - HDassert(cache_ptr->pl_size == 0); - HDassert(cache_ptr->LRU_list_len == 0); - HDassert(cache_ptr->LRU_list_size == 0); + HDassert(cache_ptr->dirty_index_size == 0); + HDassert(cache_ptr->slist_len == 0); + HDassert(cache_ptr->slist_size == 0); + HDassert(cache_ptr->pl_len == 0); + HDassert(cache_ptr->pl_size == 0); + HDassert(cache_ptr->LRU_list_len == 0); + HDassert(cache_ptr->LRU_list_size == 0); done: - FUNC_LEAVE_NOAPI(ret_value) + FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__flush_invalidate_cache() */ +} /* H5C__flush_invalidate_cache() */ - /*------------------------------------------------------------------------- - * Function: H5C_flush_invalidate_ring - * - * Purpose: Flush and destroy the entries contained in the target - * cache and ring. - * - * If the ring contains protected entries, the function will - * fail, as protected entries cannot be either flushed or - * destroyed. However all unprotected entries should be - * flushed and destroyed before the function returns failure. - * - * While pinned entries can usually be flushed, they cannot - * be destroyed. However, they should be unpinned when all - * the entries that reference them have been destroyed (thus - * reduding the pinned entry's reference count to 0, allowing - * it to be unpinned). - * - * If pinned entries are present, the function makes repeated - * passes through the cache, flushing all dirty entries - * (including the pinned dirty entries where permitted) and - * destroying all unpinned entries. This process is repeated - * until either the cache is empty, or the number of pinned - * entries stops decreasing on each pass. - * - * If flush dependencies appear in the target ring, the - * function makes repeated passes through the cache flushing - * entries in flush dependency order. - * - * Return: Non-negative on success/Negative on failure or if there was - * a request to flush all items and something was protected. - * - * Programmer: John Mainzer - * 9/1/15 - * - * Changes: Added support for the H5C__EVICT_ALLOW_LAST_PINS_FLAG. - * This flag is used to flush and evict all entries in - * the metadata cache that are not pinned -- typically, - * everything other than the superblock. - * - * ??? -- ??/??/?? - * - * A recent optimization turns off the slist unless a flush - * is in progress. This should not effect this function, as - * it is only called during a flush. Added an assertion to - * verify this. - * - * JRM -- 5/6/20 - * - *------------------------------------------------------------------------- - */ - static herr_t H5C_flush_invalidate_ring(H5F_t * f, H5C_ring_t ring, unsigned flags) - { - H5C_t *cache_ptr; - hbool_t restart_slist_scan; - uint32_t protected_entries = 0; - int32_t i; - int32_t cur_ring_pel_len; - int32_t old_ring_pel_len; - unsigned cooked_flags; - unsigned evict_flags; - H5SL_node_t *node_ptr = NULL; - H5C_cache_entry_t *entry_ptr = NULL; - H5C_cache_entry_t *next_entry_ptr = NULL; +/*------------------------------------------------------------------------- + * Function: H5C_flush_invalidate_ring + * + * Purpose: Flush and destroy the entries contained in the target + * cache and ring. + * + * If the ring contains protected entries, the function will + * fail, as protected entries cannot be either flushed or + * destroyed. However all unprotected entries should be + * flushed and destroyed before the function returns failure. + * + * While pinned entries can usually be flushed, they cannot + * be destroyed. However, they should be unpinned when all + * the entries that reference them have been destroyed (thus + * reduding the pinned entry's reference count to 0, allowing + * it to be unpinned). + * + * If pinned entries are present, the function makes repeated + * passes through the cache, flushing all dirty entries + * (including the pinned dirty entries where permitted) and + * destroying all unpinned entries. This process is repeated + * until either the cache is empty, or the number of pinned + * entries stops decreasing on each pass. + * + * If flush dependencies appear in the target ring, the + * function makes repeated passes through the cache flushing + * entries in flush dependency order. + * + * Return: Non-negative on success/Negative on failure or if there was + * a request to flush all items and something was protected. + * + * Programmer: John Mainzer + * 9/1/15 + * + * Changes: Added support for the H5C__EVICT_ALLOW_LAST_PINS_FLAG. + * This flag is used to flush and evict all entries in + * the metadata cache that are not pinned -- typically, + * everything other than the superblock. + * + * ??? -- ??/??/?? + * + * A recent optimization turns off the slist unless a flush + * is in progress. This should not effect this function, as + * it is only called during a flush. Added an assertion to + * verify this. + * + * JRM -- 5/6/20 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C_flush_invalidate_ring(H5F_t *f, H5C_ring_t ring, unsigned flags) +{ + H5C_t *cache_ptr; + hbool_t restart_slist_scan; + uint32_t protected_entries = 0; + int32_t i; + int32_t cur_ring_pel_len; + int32_t old_ring_pel_len; + unsigned cooked_flags; + unsigned evict_flags; + H5SL_node_t *node_ptr = NULL; + H5C_cache_entry_t *entry_ptr = NULL; + H5C_cache_entry_t *next_entry_ptr = NULL; #if H5C_DO_SANITY_CHECKS - uint32_t initial_slist_len = 0; - size_t initial_slist_size = 0; + uint32_t initial_slist_len = 0; + size_t initial_slist_size = 0; #endif /* H5C_DO_SANITY_CHECKS */ - herr_t ret_value = SUCCEED; - - FUNC_ENTER_NOAPI(FAIL) + herr_t ret_value = SUCCEED; - HDassert(f); - HDassert(f->shared); + FUNC_ENTER_NOAPI(FAIL) - cache_ptr = f->shared->cache; + HDassert(f); + HDassert(f->shared); - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - HDassert(cache_ptr->slist_enabled); - HDassert(cache_ptr->slist_ptr); - HDassert(ring > H5C_RING_UNDEFINED); - HDassert(ring < H5C_RING_NTYPES); + cache_ptr = f->shared->cache; - HDassert(cache_ptr->epoch_markers_active == 0); + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(cache_ptr->slist_enabled); + HDassert(cache_ptr->slist_ptr); + HDassert(ring > H5C_RING_UNDEFINED); + HDassert(ring < H5C_RING_NTYPES); - /* Filter out the flags that are not relevant to the flush/invalidate. - */ - cooked_flags = flags & H5C__FLUSH_CLEAR_ONLY_FLAG; - evict_flags = flags & H5C__EVICT_ALLOW_LAST_PINS_FLAG; + HDassert(cache_ptr->epoch_markers_active == 0); - /* The flush procedure here is a bit strange. - * - * In the outer while loop we make at least one pass through the - * cache, and then repeat until either all the pinned entries in - * the ring unpin themselves, or until the number of pinned entries - * in the ring stops declining. In this later case, we scream and die. - * - * Since the fractal heap can dirty, resize, and/or move entries - * in is flush callback, it is possible that the cache will still - * contain dirty entries at this point. If so, we must make more - * passes through the skip list to allow it to empty. - * - * Further, since clean entries can be dirtied, resized, and/or moved - * as the result of a flush call back (either the entries own, or that - * for some other cache entry), we can no longer promise to flush - * the cache entries in increasing address order. - * - * Instead, we just do the best we can -- making a pass through - * the skip list, and then a pass through the "clean" entries, and - * then repeating as needed. Thus it is quite possible that an - * entry will be evicted from the cache only to be re-loaded later - * in the flush process (From what Quincey tells me, the pin - * mechanism makes this impossible, but even it it is true now, - * we shouldn't count on it in the future.) - * - * The bottom line is that entries will probably be flushed in close - * to increasing address order, but there are no guarantees. - */ + /* Filter out the flags that are not relevant to the flush/invalidate. + */ + cooked_flags = flags & H5C__FLUSH_CLEAR_ONLY_FLAG; + evict_flags = flags & H5C__EVICT_ALLOW_LAST_PINS_FLAG; + + /* The flush procedure here is a bit strange. + * + * In the outer while loop we make at least one pass through the + * cache, and then repeat until either all the pinned entries in + * the ring unpin themselves, or until the number of pinned entries + * in the ring stops declining. In this later case, we scream and die. + * + * Since the fractal heap can dirty, resize, and/or move entries + * in is flush callback, it is possible that the cache will still + * contain dirty entries at this point. If so, we must make more + * passes through the skip list to allow it to empty. + * + * Further, since clean entries can be dirtied, resized, and/or moved + * as the result of a flush call back (either the entries own, or that + * for some other cache entry), we can no longer promise to flush + * the cache entries in increasing address order. + * + * Instead, we just do the best we can -- making a pass through + * the skip list, and then a pass through the "clean" entries, and + * then repeating as needed. Thus it is quite possible that an + * entry will be evicted from the cache only to be re-loaded later + * in the flush process (From what Quincey tells me, the pin + * mechanism makes this impossible, but even it it is true now, + * we shouldn't count on it in the future.) + * + * The bottom line is that entries will probably be flushed in close + * to increasing address order, but there are no guarantees. + */ - /* compute the number of pinned entries in this ring */ + /* compute the number of pinned entries in this ring */ - entry_ptr = cache_ptr->pel_head_ptr; - cur_ring_pel_len = 0; + entry_ptr = cache_ptr->pel_head_ptr; + cur_ring_pel_len = 0; - while (entry_ptr != NULL) { + while (entry_ptr != NULL) { - HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(entry_ptr->ring >= ring); - if (entry_ptr->ring == ring) - cur_ring_pel_len++; + HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(entry_ptr->ring >= ring); + if (entry_ptr->ring == ring) + cur_ring_pel_len++; - entry_ptr = entry_ptr->next; + entry_ptr = entry_ptr->next; - } /* end while */ + } /* end while */ - old_ring_pel_len = cur_ring_pel_len; + old_ring_pel_len = cur_ring_pel_len; - while (cache_ptr->index_ring_len[ring] > 0) { + while (cache_ptr->index_ring_len[ring] > 0) { - /* first, try to flush-destroy any dirty entries. Do this by - * making a scan through the slist. Note that new dirty entries - * may be created by the flush call backs. Thus it is possible - * that the slist will not be empty after we finish the scan. - */ + /* first, try to flush-destroy any dirty entries. Do this by + * making a scan through the slist. Note that new dirty entries + * may be created by the flush call backs. Thus it is possible + * that the slist will not be empty after we finish the scan. + */ #if H5C_DO_SANITY_CHECKS - /* Depending on circumstances, H5C__flush_single_entry() will - * remove dirty entries from the slist as it flushes them. - * Thus for sanity checks we must make note of the initial - * slist length and size before we do any flushes. - */ - initial_slist_len = cache_ptr->slist_len; - initial_slist_size = cache_ptr->slist_size; - - /* There is also the possibility that entries will be - * dirtied, resized, moved, and/or removed from the cache - * as the result of calls to the flush callbacks. We use - * the slist_len_increase and slist_size_increase increase - * fields in struct H5C_t to track these changes for purpose - * of sanity checking. - * - * To this end, we must zero these fields before we start - * the pass through the slist. - */ - cache_ptr->slist_len_increase = 0; - cache_ptr->slist_size_increase = 0; + /* Depending on circumstances, H5C__flush_single_entry() will + * remove dirty entries from the slist as it flushes them. + * Thus for sanity checks we must make note of the initial + * slist length and size before we do any flushes. + */ + initial_slist_len = cache_ptr->slist_len; + initial_slist_size = cache_ptr->slist_size; + + /* There is also the possibility that entries will be + * dirtied, resized, moved, and/or removed from the cache + * as the result of calls to the flush callbacks. We use + * the slist_len_increase and slist_size_increase increase + * fields in struct H5C_t to track these changes for purpose + * of sanity checking. + * + * To this end, we must zero these fields before we start + * the pass through the slist. + */ + cache_ptr->slist_len_increase = 0; + cache_ptr->slist_size_increase = 0; #endif /* H5C_DO_SANITY_CHECKS */ - /* Set the cache_ptr->slist_changed to false. - * - * This flag is set to TRUE by H5C__flush_single_entry if the slist - * is modified by a pre_serialize, serialize, or notify callback. - * - * H5C_flush_invalidate_ring() uses this flag to detect any - * modifications to the slist that might corrupt the scan of - * the slist -- and restart the scan in this event. - */ - cache_ptr->slist_changed = FALSE; + /* Set the cache_ptr->slist_changed to false. + * + * This flag is set to TRUE by H5C__flush_single_entry if the slist + * is modified by a pre_serialize, serialize, or notify callback. + * + * H5C_flush_invalidate_ring() uses this flag to detect any + * modifications to the slist that might corrupt the scan of + * the slist -- and restart the scan in this event. + */ + cache_ptr->slist_changed = FALSE; - /* this done, start the scan of the slist */ - restart_slist_scan = TRUE; + /* this done, start the scan of the slist */ + restart_slist_scan = TRUE; - while (restart_slist_scan || (node_ptr != NULL)) { + while (restart_slist_scan || (node_ptr != NULL)) { - if (restart_slist_scan) { + if (restart_slist_scan) { - restart_slist_scan = FALSE; + restart_slist_scan = FALSE; - /* Start at beginning of skip list */ - node_ptr = H5SL_first(cache_ptr->slist_ptr); + /* Start at beginning of skip list */ + node_ptr = H5SL_first(cache_ptr->slist_ptr); - if (node_ptr == NULL) - /* the slist is empty -- break out of inner loop */ - break; + if (node_ptr == NULL) + /* the slist is empty -- break out of inner loop */ + break; - /* Get cache entry for this node */ - next_entry_ptr = (H5C_cache_entry_t *)H5SL_item(node_ptr); + /* Get cache entry for this node */ + next_entry_ptr = (H5C_cache_entry_t *)H5SL_item(node_ptr); - if (NULL == next_entry_ptr) + if (NULL == next_entry_ptr) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "next_entry_ptr == NULL ?!?!") + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "next_entry_ptr == NULL ?!?!") - HDassert(next_entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(next_entry_ptr->is_dirty); - HDassert(next_entry_ptr->in_slist); - HDassert(next_entry_ptr->ring >= ring); + HDassert(next_entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(next_entry_ptr->is_dirty); + HDassert(next_entry_ptr->in_slist); + HDassert(next_entry_ptr->ring >= ring); - } /* end if */ + } /* end if */ - entry_ptr = next_entry_ptr; - - /* It is possible that entries will be dirtied, resized, - * flushed, or removed from the cache via the take ownership - * flag as the result of pre_serialize or serialized callbacks. - * - * This in turn can corrupt the scan through the slist. - * - * We test for slist modifications in the pre_serialize - * and serialize callbacks, and restart the scan of the - * slist if we find them. However, best we do some extra - * sanity checking just in case. - */ - HDassert(entry_ptr != NULL); - HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(entry_ptr->in_slist); - HDassert(entry_ptr->is_dirty); - HDassert(entry_ptr->ring >= ring); + entry_ptr = next_entry_ptr; - /* increment node pointer now, before we delete its target - * from the slist. - */ - node_ptr = H5SL_next(node_ptr); + /* It is possible that entries will be dirtied, resized, + * flushed, or removed from the cache via the take ownership + * flag as the result of pre_serialize or serialized callbacks. + * + * This in turn can corrupt the scan through the slist. + * + * We test for slist modifications in the pre_serialize + * and serialize callbacks, and restart the scan of the + * slist if we find them. However, best we do some extra + * sanity checking just in case. + */ + HDassert(entry_ptr != NULL); + HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(entry_ptr->in_slist); + HDassert(entry_ptr->is_dirty); + HDassert(entry_ptr->ring >= ring); - if (node_ptr != NULL) { + /* increment node pointer now, before we delete its target + * from the slist. + */ + node_ptr = H5SL_next(node_ptr); - next_entry_ptr = (H5C_cache_entry_t *)H5SL_item(node_ptr); + if (node_ptr != NULL) { - if (NULL == next_entry_ptr) + next_entry_ptr = (H5C_cache_entry_t *)H5SL_item(node_ptr); - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "next_entry_ptr == NULL ?!?!") + if (NULL == next_entry_ptr) - HDassert(next_entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(next_entry_ptr->is_dirty); - HDassert(next_entry_ptr->in_slist); - HDassert(next_entry_ptr->ring >= ring); - HDassert(entry_ptr != next_entry_ptr); - } /* end if */ - else { + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "next_entry_ptr == NULL ?!?!") - next_entry_ptr = NULL; - } + HDassert(next_entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(next_entry_ptr->is_dirty); + HDassert(next_entry_ptr->in_slist); + HDassert(next_entry_ptr->ring >= ring); + HDassert(entry_ptr != next_entry_ptr); + } /* end if */ + else { - /* Note that we now remove nodes from the slist as we flush - * the associated entries, instead of leaving them there - * until we are done, and then destroying all nodes in - * the slist. - * - * While this optimization used to be easy, with the possibility - * of new entries being added to the slist in the midst of the - * flush, we must keep the slist in canonical form at all - * times. - */ - if (((!entry_ptr->flush_me_last) || - ((entry_ptr->flush_me_last) && (cache_ptr->num_last_entries >= cache_ptr->slist_len))) && - (entry_ptr->flush_dep_nchildren == 0) && (entry_ptr->ring == ring)) { + next_entry_ptr = NULL; + } - if (entry_ptr->is_protected) { + /* Note that we now remove nodes from the slist as we flush + * the associated entries, instead of leaving them there + * until we are done, and then destroying all nodes in + * the slist. + * + * While this optimization used to be easy, with the possibility + * of new entries being added to the slist in the midst of the + * flush, we must keep the slist in canonical form at all + * times. + */ + if (((!entry_ptr->flush_me_last) || + ((entry_ptr->flush_me_last) && (cache_ptr->num_last_entries >= cache_ptr->slist_len))) && + (entry_ptr->flush_dep_nchildren == 0) && (entry_ptr->ring == ring)) { - /* we have major problems -- but lets flush - * everything we can before we flag an error. - */ - protected_entries++; + if (entry_ptr->is_protected) { - } /* end if */ - else if (entry_ptr->is_pinned) { + /* we have major problems -- but lets flush + * everything we can before we flag an error. + */ + protected_entries++; - if (H5C__flush_single_entry(f, entry_ptr, H5C__DURING_FLUSH_FLAG) < 0) + } /* end if */ + else if (entry_ptr->is_pinned) { - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "dirty pinned entry flush failed") + if (H5C__flush_single_entry(f, entry_ptr, H5C__DURING_FLUSH_FLAG) < 0) - if (cache_ptr->slist_changed) { + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "dirty pinned entry flush failed") - /* The slist has been modified by something - * other than the simple removal of the - * of the flushed entry after the flush. - * - * This has the potential to corrupt the - * scan through the slist, so restart it. - */ - restart_slist_scan = TRUE; - cache_ptr->slist_changed = FALSE; - H5C__UPDATE_STATS_FOR_SLIST_SCAN_RESTART(cache_ptr); + if (cache_ptr->slist_changed) { - } /* end if */ - } /* end else-if */ - else { + /* The slist has been modified by something + * other than the simple removal of the + * of the flushed entry after the flush. + * + * This has the potential to corrupt the + * scan through the slist, so restart it. + */ + restart_slist_scan = TRUE; + cache_ptr->slist_changed = FALSE; + H5C__UPDATE_STATS_FOR_SLIST_SCAN_RESTART(cache_ptr); - if (H5C__flush_single_entry(f, entry_ptr, - (cooked_flags | H5C__DURING_FLUSH_FLAG | - H5C__FLUSH_INVALIDATE_FLAG | - H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG)) < 0) + } /* end if */ + } /* end else-if */ + else { - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "dirty entry flush destroy failed") + if (H5C__flush_single_entry(f, entry_ptr, + (cooked_flags | H5C__DURING_FLUSH_FLAG | + H5C__FLUSH_INVALIDATE_FLAG | + H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG)) < 0) - if (cache_ptr->slist_changed) { + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "dirty entry flush destroy failed") - /* The slist has been modified by something - * other than the simple removal of the - * of the flushed entry after the flush. - * - * This has the potential to corrupt the - * scan through the slist, so restart it. - */ - restart_slist_scan = TRUE; - cache_ptr->slist_changed = FALSE; - H5C__UPDATE_STATS_FOR_SLIST_SCAN_RESTART(cache_ptr) - } /* end if */ - } /* end else */ - } /* end if */ - } /* end while loop scanning skip list */ + if (cache_ptr->slist_changed) { -#if H5C_DO_SANITY_CHECKS - /* It is possible that entries were added to the slist during - * the scan, either before or after scan pointer. The following - * asserts take this into account. - * - * Don't bother with the sanity checks if node_ptr != NULL, as - * in this case we broke out of the loop because it got changed - * out from under us. - */ + /* The slist has been modified by something + * other than the simple removal of the + * of the flushed entry after the flush. + * + * This has the potential to corrupt the + * scan through the slist, so restart it. + */ + restart_slist_scan = TRUE; + cache_ptr->slist_changed = FALSE; + H5C__UPDATE_STATS_FOR_SLIST_SCAN_RESTART(cache_ptr) + } /* end if */ + } /* end else */ + } /* end if */ + } /* end while loop scanning skip list */ - if (node_ptr == NULL) { +#if H5C_DO_SANITY_CHECKS + /* It is possible that entries were added to the slist during + * the scan, either before or after scan pointer. The following + * asserts take this into account. + * + * Don't bother with the sanity checks if node_ptr != NULL, as + * in this case we broke out of the loop because it got changed + * out from under us. + */ - HDassert(cache_ptr->slist_len == - (uint32_t)((int32_t)initial_slist_len + cache_ptr->slist_len_increase)); + if (node_ptr == NULL) { - HDassert(cache_ptr->slist_size == - (size_t)((ssize_t)initial_slist_size + cache_ptr->slist_size_increase)); - } /* end if */ -#endif /* H5C_DO_SANITY_CHECKS */ + HDassert(cache_ptr->slist_len == + (uint32_t)((int32_t)initial_slist_len + cache_ptr->slist_len_increase)); - /* Since we are doing a destroy, we must make a pass through - * the hash table and try to flush - destroy all entries that - * remain. - * - * It used to be that all entries remaining in the cache at - * this point had to be clean, but with the fractal heap mods - * this may not be the case. If so, we will flush entries out - * in increasing address order. - * - * Writes to disk are possible here. - */ + HDassert(cache_ptr->slist_size == + (size_t)((ssize_t)initial_slist_size + cache_ptr->slist_size_increase)); + } /* end if */ +#endif /* H5C_DO_SANITY_CHECKS */ - /* reset the counters so that we can detect insertions, loads, - * and moves caused by the pre_serialize and serialize calls. - */ - cache_ptr->entries_loaded_counter = 0; - cache_ptr->entries_inserted_counter = 0; - cache_ptr->entries_relocated_counter = 0; + /* Since we are doing a destroy, we must make a pass through + * the hash table and try to flush - destroy all entries that + * remain. + * + * It used to be that all entries remaining in the cache at + * this point had to be clean, but with the fractal heap mods + * this may not be the case. If so, we will flush entries out + * in increasing address order. + * + * Writes to disk are possible here. + */ - next_entry_ptr = cache_ptr->il_head; + /* reset the counters so that we can detect insertions, loads, + * and moves caused by the pre_serialize and serialize calls. + */ + cache_ptr->entries_loaded_counter = 0; + cache_ptr->entries_inserted_counter = 0; + cache_ptr->entries_relocated_counter = 0; - while (next_entry_ptr != NULL) { + next_entry_ptr = cache_ptr->il_head; - entry_ptr = next_entry_ptr; - HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(entry_ptr->ring >= ring); + while (next_entry_ptr != NULL) { - next_entry_ptr = entry_ptr->il_next; - HDassert((next_entry_ptr == NULL) || (next_entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC)); + entry_ptr = next_entry_ptr; + HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(entry_ptr->ring >= ring); - if (((!entry_ptr->flush_me_last) || - (entry_ptr->flush_me_last && (cache_ptr->num_last_entries >= cache_ptr->slist_len))) && - (entry_ptr->flush_dep_nchildren == 0) && (entry_ptr->ring == ring)) { + next_entry_ptr = entry_ptr->il_next; + HDassert((next_entry_ptr == NULL) || (next_entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC)); - if (entry_ptr->is_protected) { + if (((!entry_ptr->flush_me_last) || + (entry_ptr->flush_me_last && (cache_ptr->num_last_entries >= cache_ptr->slist_len))) && + (entry_ptr->flush_dep_nchildren == 0) && (entry_ptr->ring == ring)) { - /* we have major problems -- but lets flush and - * destroy everything we can before we flag an - * error. - */ - protected_entries++; + if (entry_ptr->is_protected) { - if (!entry_ptr->in_slist) { + /* we have major problems -- but lets flush and + * destroy everything we can before we flag an + * error. + */ + protected_entries++; - HDassert(!(entry_ptr->is_dirty)); - } - } /* end if */ - else if (!(entry_ptr->is_pinned)) { + if (!entry_ptr->in_slist) { - /* if *entry_ptr is dirty, it is possible - * that one or more other entries may be - * either removed from the cache, loaded - * into the cache, or moved to a new location - * in the file as a side effect of the flush. - * - * It's also possible that removing a clean - * entry will remove the last child of a proxy - * entry, allowing it to be removed also and - * invalidating the next_entry_ptr. - * - * If either of these happen, and one of the target - * or proxy entries happens to be the next entry in - * the hash bucket, we could either find ourselves - * either scanning a non-existent entry, scanning - * through a different bucket, or skipping an entry. - * - * Neither of these are good, so restart the - * the scan at the head of the hash bucket - * after the flush if we detect that the next_entry_ptr - * becomes invalid. - * - * This is not as inefficient at it might seem, - * as hash buckets typically have at most two - * or three entries. - */ - cache_ptr->entry_watched_for_removal = next_entry_ptr; - - if (H5C__flush_single_entry(f, entry_ptr, - (cooked_flags | H5C__DURING_FLUSH_FLAG | - H5C__FLUSH_INVALIDATE_FLAG | - H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG)) < 0) - - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Entry flush destroy failed") - - /* Restart the index list scan if necessary. Must - * do this if the next entry is evicted, and also if - * one or more entries are inserted, loaded, or moved - * as these operations can result in part of the scan - * being skipped -- which can cause a spurious failure - * if this results in the size of the pinned entry - * failing to decline during the pass. - */ - if (((NULL != next_entry_ptr) && (NULL == cache_ptr->entry_watched_for_removal)) || - (cache_ptr->entries_loaded_counter > 0) || - (cache_ptr->entries_inserted_counter > 0) || - (cache_ptr->entries_relocated_counter > 0)) { + HDassert(!(entry_ptr->is_dirty)); + } + } /* end if */ + else if (!(entry_ptr->is_pinned)) { + + /* if *entry_ptr is dirty, it is possible + * that one or more other entries may be + * either removed from the cache, loaded + * into the cache, or moved to a new location + * in the file as a side effect of the flush. + * + * It's also possible that removing a clean + * entry will remove the last child of a proxy + * entry, allowing it to be removed also and + * invalidating the next_entry_ptr. + * + * If either of these happen, and one of the target + * or proxy entries happens to be the next entry in + * the hash bucket, we could either find ourselves + * either scanning a non-existent entry, scanning + * through a different bucket, or skipping an entry. + * + * Neither of these are good, so restart the + * the scan at the head of the hash bucket + * after the flush if we detect that the next_entry_ptr + * becomes invalid. + * + * This is not as inefficient at it might seem, + * as hash buckets typically have at most two + * or three entries. + */ + cache_ptr->entry_watched_for_removal = next_entry_ptr; - next_entry_ptr = cache_ptr->il_head; + if (H5C__flush_single_entry(f, entry_ptr, + (cooked_flags | H5C__DURING_FLUSH_FLAG | + H5C__FLUSH_INVALIDATE_FLAG | + H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG)) < 0) + + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Entry flush destroy failed") + + /* Restart the index list scan if necessary. Must + * do this if the next entry is evicted, and also if + * one or more entries are inserted, loaded, or moved + * as these operations can result in part of the scan + * being skipped -- which can cause a spurious failure + * if this results in the size of the pinned entry + * failing to decline during the pass. + */ + if (((NULL != next_entry_ptr) && (NULL == cache_ptr->entry_watched_for_removal)) || + (cache_ptr->entries_loaded_counter > 0) || + (cache_ptr->entries_inserted_counter > 0) || + (cache_ptr->entries_relocated_counter > 0)) { - cache_ptr->entries_loaded_counter = 0; - cache_ptr->entries_inserted_counter = 0; - cache_ptr->entries_relocated_counter = 0; + next_entry_ptr = cache_ptr->il_head; - H5C__UPDATE_STATS_FOR_INDEX_SCAN_RESTART(cache_ptr) + cache_ptr->entries_loaded_counter = 0; + cache_ptr->entries_inserted_counter = 0; + cache_ptr->entries_relocated_counter = 0; - } /* end if */ - else { + H5C__UPDATE_STATS_FOR_INDEX_SCAN_RESTART(cache_ptr) - cache_ptr->entry_watched_for_removal = NULL; - } } /* end if */ - } /* end if */ - } /* end for loop scanning hash table */ + else { - /* We can't do anything if entries are pinned. The - * hope is that the entries will be unpinned as the - * result of destroys of entries that reference them. - * - * We detect this by noting the change in the number - * of pinned entries from pass to pass. If it stops - * shrinking before it hits zero, we scream and die. - */ - old_ring_pel_len = cur_ring_pel_len; - entry_ptr = cache_ptr->pel_head_ptr; - cur_ring_pel_len = 0; + cache_ptr->entry_watched_for_removal = NULL; + } + } /* end if */ + } /* end if */ + } /* end for loop scanning hash table */ - while (entry_ptr != NULL) { + /* We can't do anything if entries are pinned. The + * hope is that the entries will be unpinned as the + * result of destroys of entries that reference them. + * + * We detect this by noting the change in the number + * of pinned entries from pass to pass. If it stops + * shrinking before it hits zero, we scream and die. + */ + old_ring_pel_len = cur_ring_pel_len; + entry_ptr = cache_ptr->pel_head_ptr; + cur_ring_pel_len = 0; - HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(entry_ptr->ring >= ring); + while (entry_ptr != NULL) { - if (entry_ptr->ring == ring) { + HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(entry_ptr->ring >= ring); - cur_ring_pel_len++; - } + if (entry_ptr->ring == ring) { - entry_ptr = entry_ptr->next; + cur_ring_pel_len++; + } - } /* end while */ + entry_ptr = entry_ptr->next; - /* Check if the number of pinned entries in the ring is positive, and - * it is not declining. Scream and die if so. - */ - if ((cur_ring_pel_len > 0) && (cur_ring_pel_len >= old_ring_pel_len)) { + } /* end while */ - /* Don't error if allowed to have pinned entries remaining */ - if (evict_flags) { + /* Check if the number of pinned entries in the ring is positive, and + * it is not declining. Scream and die if so. + */ + if ((cur_ring_pel_len > 0) && (cur_ring_pel_len >= old_ring_pel_len)) { - HGOTO_DONE(TRUE) - } + /* Don't error if allowed to have pinned entries remaining */ + if (evict_flags) { - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, - "Pinned entry count not decreasing, cur_ring_pel_len = %d, old_ring_pel_len = " - "%d, ring = %d", - (int)cur_ring_pel_len, (int)old_ring_pel_len, (int)ring) - } /* end if */ + HGOTO_DONE(TRUE) + } - HDassert(protected_entries == cache_ptr->pl_len); + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, + "Pinned entry count not decreasing, cur_ring_pel_len = %d, old_ring_pel_len = " + "%d, ring = %d", + (int)cur_ring_pel_len, (int)old_ring_pel_len, (int)ring) + } /* end if */ - if ((protected_entries > 0) && (protected_entries == cache_ptr->index_len)) + HDassert(protected_entries == cache_ptr->pl_len); - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, - "Only protected entries left in cache, protected_entries = %d", - (int)protected_entries) + if ((protected_entries > 0) && (protected_entries == cache_ptr->index_len)) - } /* main while loop */ + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, + "Only protected entries left in cache, protected_entries = %d", + (int)protected_entries) - /* Invariants, after destroying all entries in the ring */ - for (i = (int)H5C_RING_UNDEFINED; i <= (int)ring; i++) { + } /* main while loop */ - HDassert(cache_ptr->index_ring_len[i] == 0); - HDassert(cache_ptr->index_ring_size[i] == (size_t)0); - HDassert(cache_ptr->clean_index_ring_size[i] == (size_t)0); - HDassert(cache_ptr->dirty_index_ring_size[i] == (size_t)0); + /* Invariants, after destroying all entries in the ring */ + for (i = (int)H5C_RING_UNDEFINED; i <= (int)ring; i++) { - HDassert(cache_ptr->slist_ring_len[i] == 0); - HDassert(cache_ptr->slist_ring_size[i] == (size_t)0); + HDassert(cache_ptr->index_ring_len[i] == 0); + HDassert(cache_ptr->index_ring_size[i] == (size_t)0); + HDassert(cache_ptr->clean_index_ring_size[i] == (size_t)0); + HDassert(cache_ptr->dirty_index_ring_size[i] == (size_t)0); - } /* end for */ + HDassert(cache_ptr->slist_ring_len[i] == 0); + HDassert(cache_ptr->slist_ring_size[i] == (size_t)0); - HDassert(protected_entries <= cache_ptr->pl_len); + } /* end for */ - if (protected_entries > 0) { + HDassert(protected_entries <= cache_ptr->pl_len); - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Cache has protected entries") - } - else if (cur_ring_pel_len > 0) { + if (protected_entries > 0) { - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't unpin all pinned entries in ring") - } + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Cache has protected entries") + } + else if (cur_ring_pel_len > 0) { + + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't unpin all pinned entries in ring") + } done: - FUNC_LEAVE_NOAPI(ret_value) + FUNC_LEAVE_NOAPI(ret_value) - } /* H5C_flush_invalidate_ring() */ +} /* H5C_flush_invalidate_ring() */ - /*------------------------------------------------------------------------- - * - * Function: H5C__flush_ring - * - * Purpose: Flush the entries contained in the specified cache and - * ring. All entries in rings outside the specified ring - * must have been flushed on entry. - * - * If the cache contains protected entries in the specified - * ring, the function will fail, as protected entries cannot - * be flushed. However all unprotected entries in the target - * ring should be flushed before the function returns failure. - * - * If flush dependencies appear in the target ring, the - * function makes repeated passes through the slist flushing - * entries in flush dependency order. - * - * Return: Non-negative on success/Negative on failure or if there was - * a request to flush all items and something was protected. - * - * Programmer: John Mainzer - * 9/1/15 - * - * Changes: A recent optimization turns off the slist unless a flush - * is in progress. This should not effect this function, as - * it is only called during a flush. Added an assertion to - * verify this. - * - * JRM -- 5/6/20 - * - * - *------------------------------------------------------------------------- - */ - static herr_t H5C__flush_ring(H5F_t * f, H5C_ring_t ring, unsigned flags) - { - H5C_t *cache_ptr = f->shared->cache; - hbool_t flushed_entries_last_pass; - hbool_t flush_marked_entries; - hbool_t ignore_protected; - hbool_t tried_to_flush_protected_entry = FALSE; - hbool_t restart_slist_scan; - uint32_t protected_entries = 0; - H5SL_node_t *node_ptr = NULL; - H5C_cache_entry_t *entry_ptr = NULL; - H5C_cache_entry_t *next_entry_ptr = NULL; +/*------------------------------------------------------------------------- + * + * Function: H5C__flush_ring + * + * Purpose: Flush the entries contained in the specified cache and + * ring. All entries in rings outside the specified ring + * must have been flushed on entry. + * + * If the cache contains protected entries in the specified + * ring, the function will fail, as protected entries cannot + * be flushed. However all unprotected entries in the target + * ring should be flushed before the function returns failure. + * + * If flush dependencies appear in the target ring, the + * function makes repeated passes through the slist flushing + * entries in flush dependency order. + * + * Return: Non-negative on success/Negative on failure or if there was + * a request to flush all items and something was protected. + * + * Programmer: John Mainzer + * 9/1/15 + * + * Changes: A recent optimization turns off the slist unless a flush + * is in progress. This should not effect this function, as + * it is only called during a flush. Added an assertion to + * verify this. + * + * JRM -- 5/6/20 + * + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C__flush_ring(H5F_t *f, H5C_ring_t ring, unsigned flags) +{ + H5C_t *cache_ptr = f->shared->cache; + hbool_t flushed_entries_last_pass; + hbool_t flush_marked_entries; + hbool_t ignore_protected; + hbool_t tried_to_flush_protected_entry = FALSE; + hbool_t restart_slist_scan; + uint32_t protected_entries = 0; + H5SL_node_t *node_ptr = NULL; + H5C_cache_entry_t *entry_ptr = NULL; + H5C_cache_entry_t *next_entry_ptr = NULL; #if H5C_DO_SANITY_CHECKS - uint32_t initial_slist_len = 0; - size_t initial_slist_size = 0; + uint32_t initial_slist_len = 0; + size_t initial_slist_size = 0; #endif /* H5C_DO_SANITY_CHECKS */ - int i; - herr_t ret_value = SUCCEED; + int i; + herr_t ret_value = SUCCEED; - FUNC_ENTER_STATIC + FUNC_ENTER_STATIC - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - HDassert(cache_ptr->slist_enabled); - HDassert(cache_ptr->slist_ptr); - HDassert((flags & H5C__FLUSH_INVALIDATE_FLAG) == 0); - HDassert(ring > H5C_RING_UNDEFINED); - HDassert(ring < H5C_RING_NTYPES); + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(cache_ptr->slist_enabled); + HDassert(cache_ptr->slist_ptr); + HDassert((flags & H5C__FLUSH_INVALIDATE_FLAG) == 0); + HDassert(ring > H5C_RING_UNDEFINED); + HDassert(ring < H5C_RING_NTYPES); #if H5C_DO_EXTREME_SANITY_CHECKS - if ((H5C_validate_protected_entry_list(cache_ptr) < 0) || - (H5C_validate_pinned_entry_list(cache_ptr) < 0) || (H5C_validate_lru_list(cache_ptr) < 0)) + if ((H5C_validate_protected_entry_list(cache_ptr) < 0) || + (H5C_validate_pinned_entry_list(cache_ptr) < 0) || (H5C_validate_lru_list(cache_ptr) < 0)) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "an extreme sanity check failed on entry") + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "an extreme sanity check failed on entry") #endif /* H5C_DO_EXTREME_SANITY_CHECKS */ - ignore_protected = ((flags & H5C__FLUSH_IGNORE_PROTECTED_FLAG) != 0); - flush_marked_entries = ((flags & H5C__FLUSH_MARKED_ENTRIES_FLAG) != 0); + ignore_protected = ((flags & H5C__FLUSH_IGNORE_PROTECTED_FLAG) != 0); + flush_marked_entries = ((flags & H5C__FLUSH_MARKED_ENTRIES_FLAG) != 0); - if (!flush_marked_entries) { + if (!flush_marked_entries) { - for (i = (int)H5C_RING_UNDEFINED; i < (int)ring; i++) { + for (i = (int)H5C_RING_UNDEFINED; i < (int)ring; i++) { - HDassert(cache_ptr->slist_ring_len[i] == 0); - } + HDassert(cache_ptr->slist_ring_len[i] == 0); } + } - HDassert(cache_ptr->flush_in_progress); + HDassert(cache_ptr->flush_in_progress); - /* When we are only flushing marked entries, the slist will usually - * still contain entries when we have flushed everything we should. - * Thus we track whether we have flushed any entries in the last - * pass, and terminate if we haven't. - */ - flushed_entries_last_pass = TRUE; + /* When we are only flushing marked entries, the slist will usually + * still contain entries when we have flushed everything we should. + * Thus we track whether we have flushed any entries in the last + * pass, and terminate if we haven't. + */ + flushed_entries_last_pass = TRUE; - /* Set the cache_ptr->slist_changed to false. - * - * This flag is set to TRUE by H5C__flush_single_entry if the - * slist is modified by a pre_serialize, serialize, or notify callback. - * H5C_flush_cache uses this flag to detect any modifications - * to the slist that might corrupt the scan of the slist -- and - * restart the scan in this event. - */ - cache_ptr->slist_changed = FALSE; + /* Set the cache_ptr->slist_changed to false. + * + * This flag is set to TRUE by H5C__flush_single_entry if the + * slist is modified by a pre_serialize, serialize, or notify callback. + * H5C_flush_cache uses this flag to detect any modifications + * to the slist that might corrupt the scan of the slist -- and + * restart the scan in this event. + */ + cache_ptr->slist_changed = FALSE; - while ((cache_ptr->slist_ring_len[ring] > 0) && (protected_entries == 0) && - (flushed_entries_last_pass)) { + while ((cache_ptr->slist_ring_len[ring] > 0) && (protected_entries == 0) && (flushed_entries_last_pass)) { - flushed_entries_last_pass = FALSE; + flushed_entries_last_pass = FALSE; #if H5C_DO_SANITY_CHECKS - /* For sanity checking, try to verify that the skip list has - * the expected size and number of entries at the end of each - * internal while loop (see below). - * - * Doing this get a bit tricky, as depending on flags, we may - * or may not flush all the entries in the slist. - * - * To make things more entertaining, with the advent of the - * fractal heap, the entry serialize callback can cause entries - * to be dirtied, resized, and/or moved. Also, the - * pre_serialize callback can result in an entry being - * removed from the cache via the take ownership flag. - * - * To deal with this, we first make note of the initial - * skip list length and size: - */ - initial_slist_len = cache_ptr->slist_len; - initial_slist_size = cache_ptr->slist_size; - - /* As mentioned above, there is the possibility that - * entries will be dirtied, resized, flushed, or removed - * from the cache via the take ownership flag during - * our pass through the skip list. To capture the number - * of entries added, and the skip list size delta, - * zero the slist_len_increase and slist_size_increase of - * the cache's instance of H5C_t. These fields will be - * updated elsewhere to account for slist insertions and/or - * dirty entry size changes. - */ - cache_ptr->slist_len_increase = 0; - cache_ptr->slist_size_increase = 0; + /* For sanity checking, try to verify that the skip list has + * the expected size and number of entries at the end of each + * internal while loop (see below). + * + * Doing this get a bit tricky, as depending on flags, we may + * or may not flush all the entries in the slist. + * + * To make things more entertaining, with the advent of the + * fractal heap, the entry serialize callback can cause entries + * to be dirtied, resized, and/or moved. Also, the + * pre_serialize callback can result in an entry being + * removed from the cache via the take ownership flag. + * + * To deal with this, we first make note of the initial + * skip list length and size: + */ + initial_slist_len = cache_ptr->slist_len; + initial_slist_size = cache_ptr->slist_size; + + /* As mentioned above, there is the possibility that + * entries will be dirtied, resized, flushed, or removed + * from the cache via the take ownership flag during + * our pass through the skip list. To capture the number + * of entries added, and the skip list size delta, + * zero the slist_len_increase and slist_size_increase of + * the cache's instance of H5C_t. These fields will be + * updated elsewhere to account for slist insertions and/or + * dirty entry size changes. + */ + cache_ptr->slist_len_increase = 0; + cache_ptr->slist_size_increase = 0; - /* at the end of the loop, use these values to compute the - * expected slist length and size and compare this with the - * value recorded in the cache's instance of H5C_t. - */ + /* at the end of the loop, use these values to compute the + * expected slist length and size and compare this with the + * value recorded in the cache's instance of H5C_t. + */ #endif /* H5C_DO_SANITY_CHECKS */ - restart_slist_scan = TRUE; + restart_slist_scan = TRUE; - while ((restart_slist_scan) || (node_ptr != NULL)) { + while ((restart_slist_scan) || (node_ptr != NULL)) { - if (restart_slist_scan) { + if (restart_slist_scan) { - restart_slist_scan = FALSE; + restart_slist_scan = FALSE; - /* Start at beginning of skip list */ - node_ptr = H5SL_first(cache_ptr->slist_ptr); + /* Start at beginning of skip list */ + node_ptr = H5SL_first(cache_ptr->slist_ptr); - if (node_ptr == NULL) { + if (node_ptr == NULL) { - /* the slist is empty -- break out of inner loop */ - break; - } + /* the slist is empty -- break out of inner loop */ + break; + } - /* Get cache entry for this node */ - next_entry_ptr = (H5C_cache_entry_t *)H5SL_item(node_ptr); + /* Get cache entry for this node */ + next_entry_ptr = (H5C_cache_entry_t *)H5SL_item(node_ptr); - if (NULL == next_entry_ptr) + if (NULL == next_entry_ptr) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "next_entry_ptr == NULL ?!?!") + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "next_entry_ptr == NULL ?!?!") - HDassert(next_entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(next_entry_ptr->is_dirty); - HDassert(next_entry_ptr->in_slist); + HDassert(next_entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(next_entry_ptr->is_dirty); + HDassert(next_entry_ptr->in_slist); - } /* end if */ + } /* end if */ - entry_ptr = next_entry_ptr; - - /* With the advent of the fractal heap, the free space - * manager, and the version 3 cache, it is possible - * that the pre-serialize or serialize callback will - * dirty, resize, or take ownership of other entries - * in the cache. - * - * To deal with this, I have inserted code to detect any - * change in the skip list not directly under the control - * of this function. If such modifications are detected, - * we must re-start the scan of the skip list to avoid - * the possibility that the target of the next_entry_ptr - * may have been flushed or deleted from the cache. - * - * To verify that all such possibilities have been dealt - * with, we do a bit of extra sanity checking on - * entry_ptr. - */ - HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(entry_ptr->in_slist); - HDassert(entry_ptr->is_dirty); + entry_ptr = next_entry_ptr; - if ((!flush_marked_entries) || (entry_ptr->flush_marker)) { + /* With the advent of the fractal heap, the free space + * manager, and the version 3 cache, it is possible + * that the pre-serialize or serialize callback will + * dirty, resize, or take ownership of other entries + * in the cache. + * + * To deal with this, I have inserted code to detect any + * change in the skip list not directly under the control + * of this function. If such modifications are detected, + * we must re-start the scan of the skip list to avoid + * the possibility that the target of the next_entry_ptr + * may have been flushed or deleted from the cache. + * + * To verify that all such possibilities have been dealt + * with, we do a bit of extra sanity checking on + * entry_ptr. + */ + HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(entry_ptr->in_slist); + HDassert(entry_ptr->is_dirty); - HDassert(entry_ptr->ring >= ring); - } + if ((!flush_marked_entries) || (entry_ptr->flush_marker)) { - /* Advance node pointer now, before we delete its target - * from the slist. - */ - node_ptr = H5SL_next(node_ptr); + HDassert(entry_ptr->ring >= ring); + } - if (node_ptr != NULL) { + /* Advance node pointer now, before we delete its target + * from the slist. + */ + node_ptr = H5SL_next(node_ptr); - next_entry_ptr = (H5C_cache_entry_t *)H5SL_item(node_ptr); + if (node_ptr != NULL) { - if (NULL == next_entry_ptr) + next_entry_ptr = (H5C_cache_entry_t *)H5SL_item(node_ptr); - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "next_entry_ptr == NULL ?!?!") + if (NULL == next_entry_ptr) - HDassert(next_entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(next_entry_ptr->is_dirty); - HDassert(next_entry_ptr->in_slist); + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "next_entry_ptr == NULL ?!?!") - if (!flush_marked_entries || next_entry_ptr->flush_marker) { + HDassert(next_entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(next_entry_ptr->is_dirty); + HDassert(next_entry_ptr->in_slist); - HDassert(next_entry_ptr->ring >= ring); - } + if (!flush_marked_entries || next_entry_ptr->flush_marker) { - HDassert(entry_ptr != next_entry_ptr); + HDassert(next_entry_ptr->ring >= ring); + } - } /* end if */ - else { + HDassert(entry_ptr != next_entry_ptr); - next_entry_ptr = NULL; - } + } /* end if */ + else { - if ((!flush_marked_entries || entry_ptr->flush_marker) && - ((!entry_ptr->flush_me_last) || - ((entry_ptr->flush_me_last) && ((cache_ptr->num_last_entries >= cache_ptr->slist_len) || - (flush_marked_entries && entry_ptr->flush_marker)))) && - ((entry_ptr->flush_dep_nchildren == 0) || (entry_ptr->flush_dep_ndirty_children == 0)) && - (entry_ptr->ring == ring)) { + next_entry_ptr = NULL; + } - HDassert(entry_ptr->flush_dep_nunser_children == 0); + if ((!flush_marked_entries || entry_ptr->flush_marker) && + ((!entry_ptr->flush_me_last) || + ((entry_ptr->flush_me_last) && ((cache_ptr->num_last_entries >= cache_ptr->slist_len) || + (flush_marked_entries && entry_ptr->flush_marker)))) && + ((entry_ptr->flush_dep_nchildren == 0) || (entry_ptr->flush_dep_ndirty_children == 0)) && + (entry_ptr->ring == ring)) { - if (entry_ptr->is_protected) { + HDassert(entry_ptr->flush_dep_nunser_children == 0); - /* we probably have major problems -- but lets - * flush everything we can before we decide - * whether to flag an error. - */ - tried_to_flush_protected_entry = TRUE; - protected_entries++; + if (entry_ptr->is_protected) { - } /* end if */ - else { + /* we probably have major problems -- but lets + * flush everything we can before we decide + * whether to flag an error. + */ + tried_to_flush_protected_entry = TRUE; + protected_entries++; - if (H5C__flush_single_entry(f, entry_ptr, (flags | H5C__DURING_FLUSH_FLAG)) < 0) + } /* end if */ + else { - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't flush entry") + if (H5C__flush_single_entry(f, entry_ptr, (flags | H5C__DURING_FLUSH_FLAG)) < 0) - if (cache_ptr->slist_changed) { + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't flush entry") - /* The slist has been modified by something - * other than the simple removal of the - * of the flushed entry after the flush. - * - * This has the potential to corrupt the - * scan through the slist, so restart it. - */ - restart_slist_scan = TRUE; - cache_ptr->slist_changed = FALSE; - H5C__UPDATE_STATS_FOR_SLIST_SCAN_RESTART(cache_ptr) + if (cache_ptr->slist_changed) { - } /* end if */ + /* The slist has been modified by something + * other than the simple removal of the + * of the flushed entry after the flush. + * + * This has the potential to corrupt the + * scan through the slist, so restart it. + */ + restart_slist_scan = TRUE; + cache_ptr->slist_changed = FALSE; + H5C__UPDATE_STATS_FOR_SLIST_SCAN_RESTART(cache_ptr) - flushed_entries_last_pass = TRUE; + } /* end if */ - } /* end else */ - } /* end if */ - } /* while ( ( restart_slist_scan ) || ( node_ptr != NULL ) ) */ + flushed_entries_last_pass = TRUE; + + } /* end else */ + } /* end if */ + } /* while ( ( restart_slist_scan ) || ( node_ptr != NULL ) ) */ #if H5C_DO_SANITY_CHECKS - /* Verify that the slist size and length are as expected. */ - HDassert((uint32_t)((int32_t)initial_slist_len + cache_ptr->slist_len_increase) == - cache_ptr->slist_len); - HDassert((size_t)((ssize_t)initial_slist_size + cache_ptr->slist_size_increase) == - cache_ptr->slist_size); + /* Verify that the slist size and length are as expected. */ + HDassert((uint32_t)((int32_t)initial_slist_len + cache_ptr->slist_len_increase) == + cache_ptr->slist_len); + HDassert((size_t)((ssize_t)initial_slist_size + cache_ptr->slist_size_increase) == + cache_ptr->slist_size); #endif /* H5C_DO_SANITY_CHECKS */ - } /* while */ + } /* while */ - HDassert(protected_entries <= cache_ptr->pl_len); + HDassert(protected_entries <= cache_ptr->pl_len); - if (((cache_ptr->pl_len > 0) && (!ignore_protected)) || (tried_to_flush_protected_entry)) + if (((cache_ptr->pl_len > 0) && (!ignore_protected)) || (tried_to_flush_protected_entry)) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "cache has protected items") + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "cache has protected items") #if H5C_DO_SANITY_CHECKS - if (!flush_marked_entries) { + if (!flush_marked_entries) { - HDassert(cache_ptr->slist_ring_len[ring] == 0); - HDassert(cache_ptr->slist_ring_size[ring] == 0); + HDassert(cache_ptr->slist_ring_len[ring] == 0); + HDassert(cache_ptr->slist_ring_size[ring] == 0); - } /* end if */ -#endif /* H5C_DO_SANITY_CHECKS */ + } /* end if */ +#endif /* H5C_DO_SANITY_CHECKS */ done: - FUNC_LEAVE_NOAPI(ret_value) + FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__flush_ring() */ +} /* H5C__flush_ring() */ - /*------------------------------------------------------------------------- - * - * Function: H5C__flush_single_entry - * - * Purpose: Flush or clear (and evict if requested) the cache entry - * with the specified address and type. If the type is NULL, - * any unprotected entry at the specified address will be - * flushed (and possibly evicted). - * - * Attempts to flush a protected entry will result in an - * error. - * - * If the H5C__FLUSH_INVALIDATE_FLAG flag is set, the entry will - * be cleared and not flushed, and the call can't be part of a - * sequence of flushes. - * - * The function does nothing silently if there is no entry - * at the supplied address, or if the entry found has the - * wrong type. - * - * Return: Non-negative on success/Negative on failure or if there was - * an attempt to flush a protected item. - * - * Programmer: John Mainzer, 5/5/04 - * - * Modifications: - * - * JRM -- 7/21/04 - * Updated function for the addition of the hash table. - * - * QAK -- 11/26/04 - * Updated function for the switch from TBBTs to skip lists. - * - * JRM -- 1/6/05 - * Updated function to reset the flush_marker field. - * Also replace references to H5F_FLUSH_INVALIDATE and - * H5F_FLUSH_CLEAR_ONLY with references to - * H5C__FLUSH_INVALIDATE_FLAG and H5C__FLUSH_CLEAR_ONLY_FLAG - * respectively. - * - * JRM -- 6/24/05 - * Added code to remove dirty entries from the slist after - * they have been flushed. Also added a sanity check that - * will scream if we attempt a write when writes are - * completely disabled. - * - * JRM -- 7/5/05 - * Added code to call the new log_flush callback whenever - * a dirty entry is written to disk. Note that the callback - * is not called if the H5C__FLUSH_CLEAR_ONLY_FLAG is set, - * as there is no write to file in this case. - * - * JRM -- 8/21/06 - * Added code maintaining the flush_in_progress and - * destroy_in_progress fields in H5C_cache_entry_t. - * - * Also added flush_flags parameter to the call to - * type_ptr->flush() so that the flush routine can report - * whether the entry has been resized or renamed. Added - * code using the flush_flags variable to detect the case - * in which the target entry is resized during flush, and - * update the caches data structures accordingly. - * - * JRM -- 3/29/07 - * Added sanity checks on the new is_read_only and - * ro_ref_count fields. - * - * QAK -- 2/07/08 - * Separated "destroy entry" concept from "remove entry from - * cache" concept, by adding the 'take_ownership' flag and - * the "destroy_entry" variable. - * - * JRM -- 11/5/08 - * Added call to H5C__UPDATE_INDEX_FOR_ENTRY_CLEAN() to - * maintain the new clean_index_size and clean_index_size - * fields of H5C_t. - * - * - * Missing entries?? - * - * - * JRM -- 5/8/20 - * Updated sanity checks for the possibility that the slist - * is disabled. - * - * Also updated main comment to conform more closely with - * the current state of the code. - * - *------------------------------------------------------------------------- +/*------------------------------------------------------------------------- + * + * Function: H5C__flush_single_entry + * + * Purpose: Flush or clear (and evict if requested) the cache entry + * with the specified address and type. If the type is NULL, + * any unprotected entry at the specified address will be + * flushed (and possibly evicted). + * + * Attempts to flush a protected entry will result in an + * error. + * + * If the H5C__FLUSH_INVALIDATE_FLAG flag is set, the entry will + * be cleared and not flushed, and the call can't be part of a + * sequence of flushes. + * + * The function does nothing silently if there is no entry + * at the supplied address, or if the entry found has the + * wrong type. + * + * Return: Non-negative on success/Negative on failure or if there was + * an attempt to flush a protected item. + * + * Programmer: John Mainzer, 5/5/04 + * + * Modifications: + * + * JRM -- 7/21/04 + * Updated function for the addition of the hash table. + * + * QAK -- 11/26/04 + * Updated function for the switch from TBBTs to skip lists. + * + * JRM -- 1/6/05 + * Updated function to reset the flush_marker field. + * Also replace references to H5F_FLUSH_INVALIDATE and + * H5F_FLUSH_CLEAR_ONLY with references to + * H5C__FLUSH_INVALIDATE_FLAG and H5C__FLUSH_CLEAR_ONLY_FLAG + * respectively. + * + * JRM -- 6/24/05 + * Added code to remove dirty entries from the slist after + * they have been flushed. Also added a sanity check that + * will scream if we attempt a write when writes are + * completely disabled. + * + * JRM -- 7/5/05 + * Added code to call the new log_flush callback whenever + * a dirty entry is written to disk. Note that the callback + * is not called if the H5C__FLUSH_CLEAR_ONLY_FLAG is set, + * as there is no write to file in this case. + * + * JRM -- 8/21/06 + * Added code maintaining the flush_in_progress and + * destroy_in_progress fields in H5C_cache_entry_t. + * + * Also added flush_flags parameter to the call to + * type_ptr->flush() so that the flush routine can report + * whether the entry has been resized or renamed. Added + * code using the flush_flags variable to detect the case + * in which the target entry is resized during flush, and + * update the caches data structures accordingly. + * + * JRM -- 3/29/07 + * Added sanity checks on the new is_read_only and + * ro_ref_count fields. + * + * QAK -- 2/07/08 + * Separated "destroy entry" concept from "remove entry from + * cache" concept, by adding the 'take_ownership' flag and + * the "destroy_entry" variable. + * + * JRM -- 11/5/08 + * Added call to H5C__UPDATE_INDEX_FOR_ENTRY_CLEAN() to + * maintain the new clean_index_size and clean_index_size + * fields of H5C_t. + * + * + * Missing entries?? + * + * + * JRM -- 5/8/20 + * Updated sanity checks for the possibility that the slist + * is disabled. + * + * Also updated main comment to conform more closely with + * the current state of the code. + * + *------------------------------------------------------------------------- + */ +herr_t +H5C__flush_single_entry(H5F_t *f, H5C_cache_entry_t *entry_ptr, unsigned flags) +{ + H5C_t *cache_ptr; /* Cache for file */ + hbool_t destroy; /* external flag */ + hbool_t clear_only; /* external flag */ + hbool_t free_file_space; /* external flag */ + hbool_t take_ownership; /* external flag */ + hbool_t del_from_slist_on_destroy; /* external flag */ + hbool_t during_flush; /* external flag */ + hbool_t write_entry; /* internal flag */ + hbool_t destroy_entry; /* internal flag */ + hbool_t generate_image; /* internal flag */ + hbool_t update_page_buffer; /* internal flag */ + hbool_t was_dirty; + hbool_t suppress_image_entry_writes = FALSE; + hbool_t suppress_image_entry_frees = FALSE; + haddr_t entry_addr = HADDR_UNDEF; + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_PACKAGE + + HDassert(f); + cache_ptr = f->shared->cache; + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(entry_ptr); + HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(entry_ptr->ring != H5C_RING_UNDEFINED); + HDassert(entry_ptr->type); + + /* setup external flags from the flags parameter */ + destroy = ((flags & H5C__FLUSH_INVALIDATE_FLAG) != 0); + clear_only = ((flags & H5C__FLUSH_CLEAR_ONLY_FLAG) != 0); + free_file_space = ((flags & H5C__FREE_FILE_SPACE_FLAG) != 0); + take_ownership = ((flags & H5C__TAKE_OWNERSHIP_FLAG) != 0); + del_from_slist_on_destroy = ((flags & H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) != 0); + during_flush = ((flags & H5C__DURING_FLUSH_FLAG) != 0); + generate_image = ((flags & H5C__GENERATE_IMAGE_FLAG) != 0); + update_page_buffer = ((flags & H5C__UPDATE_PAGE_BUFFER_FLAG) != 0); + + /* Set the flag for destroying the entry, based on the 'take ownership' + * and 'destroy' flags */ - herr_t H5C__flush_single_entry(H5F_t * f, H5C_cache_entry_t * entry_ptr, unsigned flags) - { - H5C_t *cache_ptr; /* Cache for file */ - hbool_t destroy; /* external flag */ - hbool_t clear_only; /* external flag */ - hbool_t free_file_space; /* external flag */ - hbool_t take_ownership; /* external flag */ - hbool_t del_from_slist_on_destroy; /* external flag */ - hbool_t during_flush; /* external flag */ - hbool_t write_entry; /* internal flag */ - hbool_t destroy_entry; /* internal flag */ - hbool_t generate_image; /* internal flag */ - hbool_t update_page_buffer; /* internal flag */ - hbool_t was_dirty; - hbool_t suppress_image_entry_writes = FALSE; - hbool_t suppress_image_entry_frees = FALSE; - haddr_t entry_addr = HADDR_UNDEF; - herr_t ret_value = SUCCEED; /* Return value */ - - FUNC_ENTER_PACKAGE - - HDassert(f); - cache_ptr = f->shared->cache; - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - HDassert(entry_ptr); - HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(entry_ptr->ring != H5C_RING_UNDEFINED); - HDassert(entry_ptr->type); - - /* setup external flags from the flags parameter */ - destroy = ((flags & H5C__FLUSH_INVALIDATE_FLAG) != 0); - clear_only = ((flags & H5C__FLUSH_CLEAR_ONLY_FLAG) != 0); - free_file_space = ((flags & H5C__FREE_FILE_SPACE_FLAG) != 0); - take_ownership = ((flags & H5C__TAKE_OWNERSHIP_FLAG) != 0); - del_from_slist_on_destroy = ((flags & H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) != 0); - during_flush = ((flags & H5C__DURING_FLUSH_FLAG) != 0); - generate_image = ((flags & H5C__GENERATE_IMAGE_FLAG) != 0); - update_page_buffer = ((flags & H5C__UPDATE_PAGE_BUFFER_FLAG) != 0); - - /* Set the flag for destroying the entry, based on the 'take ownership' - * and 'destroy' flags - */ - if (take_ownership) { + if (take_ownership) { - destroy_entry = FALSE; - } - else { + destroy_entry = FALSE; + } + else { - destroy_entry = destroy; - } + destroy_entry = destroy; + } - /* we will write the entry to disk if it exists, is dirty, and if the - * clear only flag is not set. - */ - if (entry_ptr->is_dirty && !clear_only) { + /* we will write the entry to disk if it exists, is dirty, and if the + * clear only flag is not set. + */ + if (entry_ptr->is_dirty && !clear_only) { - write_entry = TRUE; - } - else { + write_entry = TRUE; + } + else { - write_entry = FALSE; - } + write_entry = FALSE; + } - /* if we have received close warning, and we have been instructed to - * generate a metadata cache image, and we have actually constructed - * the entry images, set suppress_image_entry_frees to TRUE. - * - * Set suppress_image_entry_writes to TRUE if indicated by the - * image_ctl flags. - */ - if ((cache_ptr->close_warning_received) && (cache_ptr->image_ctl.generate_image) && - (cache_ptr->num_entries_in_image > 0) && (cache_ptr->image_entries != NULL)) { + /* if we have received close warning, and we have been instructed to + * generate a metadata cache image, and we have actually constructed + * the entry images, set suppress_image_entry_frees to TRUE. + * + * Set suppress_image_entry_writes to TRUE if indicated by the + * image_ctl flags. + */ + if ((cache_ptr->close_warning_received) && (cache_ptr->image_ctl.generate_image) && + (cache_ptr->num_entries_in_image > 0) && (cache_ptr->image_entries != NULL)) { - /* Sanity checks */ - HDassert(entry_ptr->image_up_to_date || !(entry_ptr->include_in_image)); - HDassert(entry_ptr->image_ptr || !(entry_ptr->include_in_image)); - HDassert((!clear_only) || !(entry_ptr->include_in_image)); - HDassert((!take_ownership) || !(entry_ptr->include_in_image)); - HDassert((!free_file_space) || !(entry_ptr->include_in_image)); + /* Sanity checks */ + HDassert(entry_ptr->image_up_to_date || !(entry_ptr->include_in_image)); + HDassert(entry_ptr->image_ptr || !(entry_ptr->include_in_image)); + HDassert((!clear_only) || !(entry_ptr->include_in_image)); + HDassert((!take_ownership) || !(entry_ptr->include_in_image)); + HDassert((!free_file_space) || !(entry_ptr->include_in_image)); - suppress_image_entry_frees = TRUE; + suppress_image_entry_frees = TRUE; - if (cache_ptr->image_ctl.flags & H5C_CI__SUPRESS_ENTRY_WRITES) { + if (cache_ptr->image_ctl.flags & H5C_CI__SUPRESS_ENTRY_WRITES) { - suppress_image_entry_writes = TRUE; + suppress_image_entry_writes = TRUE; - } /* end if */ - } /* end if */ + } /* end if */ + } /* end if */ - /* run initial sanity checks */ + /* run initial sanity checks */ #if H5C_DO_SANITY_CHECKS - if (cache_ptr->slist_enabled) { + if (cache_ptr->slist_enabled) { - if (entry_ptr->in_slist) { + if (entry_ptr->in_slist) { - HDassert(entry_ptr->is_dirty); + HDassert(entry_ptr->is_dirty); - if ((entry_ptr->flush_marker) && (!entry_ptr->is_dirty)) + if ((entry_ptr->flush_marker) && (!entry_ptr->is_dirty)) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "entry in slist failed sanity checks") - } /* end if */ - else { + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "entry in slist failed sanity checks") + } /* end if */ + else { - HDassert(!entry_ptr->is_dirty); - HDassert(!entry_ptr->flush_marker); + HDassert(!entry_ptr->is_dirty); + HDassert(!entry_ptr->flush_marker); - if ((entry_ptr->is_dirty) || (entry_ptr->flush_marker)) + if ((entry_ptr->is_dirty) || (entry_ptr->flush_marker)) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "entry failed sanity checks") + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "entry failed sanity checks") - } /* end else */ - } - else { /* slist is disabled */ + } /* end else */ + } + else { /* slist is disabled */ - HDassert(!entry_ptr->in_slist); + HDassert(!entry_ptr->in_slist); - if (!entry_ptr->is_dirty) { + if (!entry_ptr->is_dirty) { - if (entry_ptr->flush_marker) + if (entry_ptr->flush_marker) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "flush marked clean entry?") - } + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "flush marked clean entry?") } + } #endif /* H5C_DO_SANITY_CHECKS */ - if (entry_ptr->is_protected) { + if (entry_ptr->is_protected) { - HDassert(!entry_ptr->is_protected); + HDassert(!entry_ptr->is_protected); - /* Attempt to flush a protected entry -- scream and die. */ - HGOTO_ERROR(H5E_CACHE, H5E_PROTECT, FAIL, "Attempt to flush a protected entry") + /* Attempt to flush a protected entry -- scream and die. */ + HGOTO_ERROR(H5E_CACHE, H5E_PROTECT, FAIL, "Attempt to flush a protected entry") - } /* end if */ + } /* end if */ - /* Set entry_ptr->flush_in_progress = TRUE and set - * entry_ptr->flush_marker = FALSE - * - * We will set flush_in_progress back to FALSE at the end if the - * entry still exists at that point. - */ - entry_ptr->flush_in_progress = TRUE; - entry_ptr->flush_marker = FALSE; + /* Set entry_ptr->flush_in_progress = TRUE and set + * entry_ptr->flush_marker = FALSE + * + * We will set flush_in_progress back to FALSE at the end if the + * entry still exists at that point. + */ + entry_ptr->flush_in_progress = TRUE; + entry_ptr->flush_marker = FALSE; - /* Preserve current dirty state for later */ - was_dirty = entry_ptr->is_dirty; + /* Preserve current dirty state for later */ + was_dirty = entry_ptr->is_dirty; - /* The entry is dirty, and we are doing a flush, a flush destroy or have - * been requested to generate an image. In those cases, serialize the - * entry. - */ - if (write_entry || generate_image) { + /* The entry is dirty, and we are doing a flush, a flush destroy or have + * been requested to generate an image. In those cases, serialize the + * entry. + */ + if (write_entry || generate_image) { - HDassert(entry_ptr->is_dirty); + HDassert(entry_ptr->is_dirty); - if (NULL == entry_ptr->image_ptr) { + if (NULL == entry_ptr->image_ptr) { - if (NULL == (entry_ptr->image_ptr = H5MM_malloc(entry_ptr->size + H5C_IMAGE_EXTRA_SPACE))) + if (NULL == (entry_ptr->image_ptr = H5MM_malloc(entry_ptr->size + H5C_IMAGE_EXTRA_SPACE))) - HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, - "memory allocation failed for on disk image buffer") + HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, + "memory allocation failed for on disk image buffer") #if H5C_DO_MEMORY_SANITY_CHECKS - H5MM_memcpy(((uint8_t *)entry_ptr->image_ptr) + entry_ptr->size, H5C_IMAGE_SANITY_VALUE, - H5C_IMAGE_EXTRA_SPACE); + H5MM_memcpy(((uint8_t *)entry_ptr->image_ptr) + entry_ptr->size, H5C_IMAGE_SANITY_VALUE, + H5C_IMAGE_EXTRA_SPACE); #endif /* H5C_DO_MEMORY_SANITY_CHECKS */ - } /* end if */ + } /* end if */ - if (!(entry_ptr->image_up_to_date)) { + if (!(entry_ptr->image_up_to_date)) { - /* Sanity check */ - HDassert(!entry_ptr->prefetched); + /* Sanity check */ + HDassert(!entry_ptr->prefetched); - /* Generate the entry's image */ - if (H5C__generate_image(f, cache_ptr, entry_ptr) < 0) + /* Generate the entry's image */ + if (H5C__generate_image(f, cache_ptr, entry_ptr) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, FAIL, "can't generate entry's image") + HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, FAIL, "can't generate entry's image") - } /* end if ( ! (entry_ptr->image_up_to_date) ) */ - } /* end if */ + } /* end if ( ! (entry_ptr->image_up_to_date) ) */ + } /* end if */ - /* Finally, write the image to disk. - * - * Note that if the H5AC__CLASS_SKIP_WRITES flag is set in the - * in the entry's type, we silently skip the write. This - * flag should only be used in test code. - */ - if (write_entry) { + /* Finally, write the image to disk. + * + * Note that if the H5AC__CLASS_SKIP_WRITES flag is set in the + * in the entry's type, we silently skip the write. This + * flag should only be used in test code. + */ + if (write_entry) { - HDassert(entry_ptr->is_dirty); + HDassert(entry_ptr->is_dirty); #if H5C_DO_SANITY_CHECKS - if ((cache_ptr->check_write_permitted) && (!(cache_ptr->write_permitted))) + if ((cache_ptr->check_write_permitted) && (!(cache_ptr->write_permitted))) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Write when writes are always forbidden!?!?!") + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Write when writes are always forbidden!?!?!") #endif /* H5C_DO_SANITY_CHECKS */ - /* Write the image to disk unless the write is suppressed. - * - * This happens if both suppress_image_entry_writes and - * entry_ptr->include_in_image are TRUE, or if the - * H5AC__CLASS_SKIP_WRITES is set in the entry's type. This - * flag should only be used in test code - */ - if (((!suppress_image_entry_writes) || (!entry_ptr->include_in_image)) && - (((entry_ptr->type->flags) & H5C__CLASS_SKIP_WRITES) == 0)) { + /* Write the image to disk unless the write is suppressed. + * + * This happens if both suppress_image_entry_writes and + * entry_ptr->include_in_image are TRUE, or if the + * H5AC__CLASS_SKIP_WRITES is set in the entry's type. This + * flag should only be used in test code + */ + if (((!suppress_image_entry_writes) || (!entry_ptr->include_in_image)) && + (((entry_ptr->type->flags) & H5C__CLASS_SKIP_WRITES) == 0)) { - H5FD_mem_t mem_type = H5FD_MEM_DEFAULT; + H5FD_mem_t mem_type = H5FD_MEM_DEFAULT; #ifdef H5_HAVE_PARALLEL - if (cache_ptr->coll_write_list) { + if (cache_ptr->coll_write_list) { - if (H5SL_insert(cache_ptr->coll_write_list, entry_ptr, &entry_ptr->addr) < 0) + if (H5SL_insert(cache_ptr->coll_write_list, entry_ptr, &entry_ptr->addr) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTINSERT, FAIL, "unable to insert skip list item") - } /* end if */ - else { + HGOTO_ERROR(H5E_CACHE, H5E_CANTINSERT, FAIL, "unable to insert skip list item") + } /* end if */ + else { #endif /* H5_HAVE_PARALLEL */ - if (entry_ptr->prefetched) { + if (entry_ptr->prefetched) { - HDassert(entry_ptr->type->id == H5AC_PREFETCHED_ENTRY_ID); + HDassert(entry_ptr->type->id == H5AC_PREFETCHED_ENTRY_ID); - mem_type = cache_ptr->class_table_ptr[entry_ptr->prefetch_type_id]->mem_type; - } /* end if */ - else { + mem_type = cache_ptr->class_table_ptr[entry_ptr->prefetch_type_id]->mem_type; + } /* end if */ + else { - mem_type = entry_ptr->type->mem_type; - } + mem_type = entry_ptr->type->mem_type; + } - if (H5F_block_write(f, mem_type, entry_ptr->addr, entry_ptr->size, entry_ptr->image_ptr) < - 0) + if (H5F_block_write(f, mem_type, entry_ptr->addr, entry_ptr->size, entry_ptr->image_ptr) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't write image to file") + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't write image to file") #ifdef H5_HAVE_PARALLEL - } + } #endif /* H5_HAVE_PARALLEL */ - } /* end if */ + } /* end if */ - /* if the entry has a notify callback, notify it that we have - * just flushed the entry. - */ - if ((entry_ptr->type->notify) && - ((entry_ptr->type->notify)(H5C_NOTIFY_ACTION_AFTER_FLUSH, entry_ptr) < 0)) + /* if the entry has a notify callback, notify it that we have + * just flushed the entry. + */ + if ((entry_ptr->type->notify) && + ((entry_ptr->type->notify)(H5C_NOTIFY_ACTION_AFTER_FLUSH, entry_ptr) < 0)) - HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, "can't notify client of entry flush") + HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, "can't notify client of entry flush") - } /* if ( write_entry ) */ + } /* if ( write_entry ) */ - /* At this point, all pre-serialize and serialize calls have been - * made if it was appropriate to make them. Similarly, the entry - * has been written to disk if desired. - * - * Thus it is now safe to update the cache data structures for the - * flush. - */ + /* At this point, all pre-serialize and serialize calls have been + * made if it was appropriate to make them. Similarly, the entry + * has been written to disk if desired. + * + * Thus it is now safe to update the cache data structures for the + * flush. + */ - /* start by updating the statistics */ - if (clear_only) { + /* start by updating the statistics */ + if (clear_only) { - /* only log a clear if the entry was dirty */ - if (was_dirty) { + /* only log a clear if the entry was dirty */ + if (was_dirty) { - H5C__UPDATE_STATS_FOR_CLEAR(cache_ptr, entry_ptr) + H5C__UPDATE_STATS_FOR_CLEAR(cache_ptr, entry_ptr) - } /* end if */ - } - else if (write_entry) { + } /* end if */ + } + else if (write_entry) { - HDassert(was_dirty); + HDassert(was_dirty); - /* only log a flush if we actually wrote to disk */ - H5C__UPDATE_STATS_FOR_FLUSH(cache_ptr, entry_ptr) + /* only log a flush if we actually wrote to disk */ + H5C__UPDATE_STATS_FOR_FLUSH(cache_ptr, entry_ptr) - } /* end else if */ + } /* end else if */ - /* Note that the algorithm below is (very) similar to the set of operations - * in H5C_remove_entry() and should be kept in sync with changes - * to that code. - QAK, 2016/11/30 - */ + /* Note that the algorithm below is (very) similar to the set of operations + * in H5C_remove_entry() and should be kept in sync with changes + * to that code. - QAK, 2016/11/30 + */ - /* Update the cache internal data structures. */ - if (destroy) { + /* Update the cache internal data structures. */ + if (destroy) { - /* Sanity checks */ - if (take_ownership) { + /* Sanity checks */ + if (take_ownership) { - HDassert(!destroy_entry); - } - else { + HDassert(!destroy_entry); + } + else { - HDassert(destroy_entry); - } + HDassert(destroy_entry); + } - HDassert(!entry_ptr->is_pinned); + HDassert(!entry_ptr->is_pinned); - /* Update stats, while entry is still in the cache */ - H5C__UPDATE_STATS_FOR_EVICTION(cache_ptr, entry_ptr, take_ownership) + /* Update stats, while entry is still in the cache */ + H5C__UPDATE_STATS_FOR_EVICTION(cache_ptr, entry_ptr, take_ownership) - /* If the entry's type has a 'notify' callback and the entry is about - * to be removed from the cache, send a 'before eviction' notice while - * the entry is still fully integrated in the cache. - */ - if ((entry_ptr->type->notify) && - ((entry_ptr->type->notify)(H5C_NOTIFY_ACTION_BEFORE_EVICT, entry_ptr) < 0)) + /* If the entry's type has a 'notify' callback and the entry is about + * to be removed from the cache, send a 'before eviction' notice while + * the entry is still fully integrated in the cache. + */ + if ((entry_ptr->type->notify) && + ((entry_ptr->type->notify)(H5C_NOTIFY_ACTION_BEFORE_EVICT, entry_ptr) < 0)) - HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, "can't notify client about entry to evict") + HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, "can't notify client about entry to evict") - /* Update the cache internal data structures as appropriate - * for a destroy. Specifically: - * - * 1) Delete it from the index - * - * 2) Delete it from the skip list if requested. - * - * 3) Delete it from the collective read access list. - * - * 4) Update the replacement policy for eviction - * - * 5) Remove it from the tag list for this object - * - * Finally, if the destroy_entry flag is set, discard the - * entry. - */ - H5C__DELETE_FROM_INDEX(cache_ptr, entry_ptr, FAIL) + /* Update the cache internal data structures as appropriate + * for a destroy. Specifically: + * + * 1) Delete it from the index + * + * 2) Delete it from the skip list if requested. + * + * 3) Delete it from the collective read access list. + * + * 4) Update the replacement policy for eviction + * + * 5) Remove it from the tag list for this object + * + * Finally, if the destroy_entry flag is set, discard the + * entry. + */ + H5C__DELETE_FROM_INDEX(cache_ptr, entry_ptr, FAIL) - if ((entry_ptr->in_slist) && (del_from_slist_on_destroy)) { + if ((entry_ptr->in_slist) && (del_from_slist_on_destroy)) { - H5C__REMOVE_ENTRY_FROM_SLIST(cache_ptr, entry_ptr, during_flush) - } + H5C__REMOVE_ENTRY_FROM_SLIST(cache_ptr, entry_ptr, during_flush) + } #ifdef H5_HAVE_PARALLEL - /* Check for collective read access flag */ - if (entry_ptr->coll_access) { + /* Check for collective read access flag */ + if (entry_ptr->coll_access) { - entry_ptr->coll_access = FALSE; + entry_ptr->coll_access = FALSE; - H5C__REMOVE_FROM_COLL_LIST(cache_ptr, entry_ptr, FAIL) + H5C__REMOVE_FROM_COLL_LIST(cache_ptr, entry_ptr, FAIL) - } /* end if */ -#endif /* H5_HAVE_PARALLEL */ + } /* end if */ +#endif /* H5_HAVE_PARALLEL */ - H5C__UPDATE_RP_FOR_EVICTION(cache_ptr, entry_ptr, FAIL) + H5C__UPDATE_RP_FOR_EVICTION(cache_ptr, entry_ptr, FAIL) - /* Remove entry from tag list */ - if (H5C__untag_entry(cache_ptr, entry_ptr) < 0) + /* Remove entry from tag list */ + if (H5C__untag_entry(cache_ptr, entry_ptr) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, "can't remove entry from tag list") + HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, "can't remove entry from tag list") - /* verify that the entry is no longer part of any flush dependencies */ - HDassert(entry_ptr->flush_dep_nparents == 0); - HDassert(entry_ptr->flush_dep_nchildren == 0); + /* verify that the entry is no longer part of any flush dependencies */ + HDassert(entry_ptr->flush_dep_nparents == 0); + HDassert(entry_ptr->flush_dep_nchildren == 0); - } /* end if */ - else { + } /* end if */ + else { - HDassert(clear_only || write_entry); - HDassert(entry_ptr->is_dirty); - HDassert((!cache_ptr->slist_enabled) || (entry_ptr->in_slist)); + HDassert(clear_only || write_entry); + HDassert(entry_ptr->is_dirty); + HDassert((!cache_ptr->slist_enabled) || (entry_ptr->in_slist)); - /* We are either doing a flush or a clear. - * - * A clear and a flush are the same from the point of - * view of the replacement policy and the slist. - * Hence no differentiation between them. - * - * JRM -- 7/7/07 - */ + /* We are either doing a flush or a clear. + * + * A clear and a flush are the same from the point of + * view of the replacement policy and the slist. + * Hence no differentiation between them. + * + * JRM -- 7/7/07 + */ - H5C__UPDATE_RP_FOR_FLUSH(cache_ptr, entry_ptr, FAIL) + H5C__UPDATE_RP_FOR_FLUSH(cache_ptr, entry_ptr, FAIL) - H5C__REMOVE_ENTRY_FROM_SLIST(cache_ptr, entry_ptr, during_flush) + H5C__REMOVE_ENTRY_FROM_SLIST(cache_ptr, entry_ptr, during_flush) - /* mark the entry as clean and update the index for - * entry clean. Also, call the clear callback - * if defined. - */ - entry_ptr->is_dirty = FALSE; + /* mark the entry as clean and update the index for + * entry clean. Also, call the clear callback + * if defined. + */ + entry_ptr->is_dirty = FALSE; - H5C__UPDATE_INDEX_FOR_ENTRY_CLEAN(cache_ptr, entry_ptr); + H5C__UPDATE_INDEX_FOR_ENTRY_CLEAN(cache_ptr, entry_ptr); - /* Check for entry changing status and do notifications, etc. */ - if (was_dirty) { + /* Check for entry changing status and do notifications, etc. */ + if (was_dirty) { - /* If the entry's type has a 'notify' callback send a - * 'entry cleaned' notice now that the entry is fully - * integrated into the cache. - */ - if ((entry_ptr->type->notify) && - ((entry_ptr->type->notify)(H5C_NOTIFY_ACTION_ENTRY_CLEANED, entry_ptr) < 0)) + /* If the entry's type has a 'notify' callback send a + * 'entry cleaned' notice now that the entry is fully + * integrated into the cache. + */ + if ((entry_ptr->type->notify) && + ((entry_ptr->type->notify)(H5C_NOTIFY_ACTION_ENTRY_CLEANED, entry_ptr) < 0)) - HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, - "can't notify client about entry dirty flag cleared") + HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, + "can't notify client about entry dirty flag cleared") - /* Propagate the clean flag up the flush dependency chain - * if appropriate - */ - if (entry_ptr->flush_dep_ndirty_children != 0) { + /* Propagate the clean flag up the flush dependency chain + * if appropriate + */ + if (entry_ptr->flush_dep_ndirty_children != 0) { - HDassert(entry_ptr->flush_dep_ndirty_children == 0); - } + HDassert(entry_ptr->flush_dep_ndirty_children == 0); + } - if (entry_ptr->flush_dep_nparents > 0) { + if (entry_ptr->flush_dep_nparents > 0) { - if (H5C__mark_flush_dep_clean(entry_ptr) < 0) + if (H5C__mark_flush_dep_clean(entry_ptr) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTMARKCLEAN, FAIL, - "Can't propagate flush dep clean flag") - } - } /* end if */ - } /* end else */ + HGOTO_ERROR(H5E_CACHE, H5E_CANTMARKCLEAN, FAIL, "Can't propagate flush dep clean flag") + } + } /* end if */ + } /* end else */ - /* reset the flush_in progress flag */ - entry_ptr->flush_in_progress = FALSE; + /* reset the flush_in progress flag */ + entry_ptr->flush_in_progress = FALSE; - /* capture the cache entry address for the log_flush call at the - * end before the entry_ptr gets freed - */ - entry_addr = entry_ptr->addr; + /* capture the cache entry address for the log_flush call at the + * end before the entry_ptr gets freed + */ + entry_addr = entry_ptr->addr; - /* Internal cache data structures should now be up to date, and - * consistent with the status of the entry. - * - * Now discard the entry if appropriate. - */ - if (destroy) { + /* Internal cache data structures should now be up to date, and + * consistent with the status of the entry. + * + * Now discard the entry if appropriate. + */ + if (destroy) { - /* Sanity check */ - HDassert(0 == entry_ptr->flush_dep_nparents); + /* Sanity check */ + HDassert(0 == entry_ptr->flush_dep_nparents); - /* if both suppress_image_entry_frees and entry_ptr->include_in_image - * are true, simply set entry_ptr->image_ptr to NULL, as we have - * another pointer to the buffer in an instance of H5C_image_entry_t - * in cache_ptr->image_entries. - * - * Otherwise, free the buffer if it exists. - */ - if (suppress_image_entry_frees && entry_ptr->include_in_image) { + /* if both suppress_image_entry_frees and entry_ptr->include_in_image + * are true, simply set entry_ptr->image_ptr to NULL, as we have + * another pointer to the buffer in an instance of H5C_image_entry_t + * in cache_ptr->image_entries. + * + * Otherwise, free the buffer if it exists. + */ + if (suppress_image_entry_frees && entry_ptr->include_in_image) { - entry_ptr->image_ptr = NULL; - } - else if (entry_ptr->image_ptr != NULL) { + entry_ptr->image_ptr = NULL; + } + else if (entry_ptr->image_ptr != NULL) { - entry_ptr->image_ptr = H5MM_xfree(entry_ptr->image_ptr); - } + entry_ptr->image_ptr = H5MM_xfree(entry_ptr->image_ptr); + } - /* If the entry is not a prefetched entry, verify that the flush - * dependency parents addresses array has been transferred. - * - * If the entry is prefetched, the free_isr routine will dispose of - * the flush dependency parents addresses array if necessary. - */ - if (!entry_ptr->prefetched) { + /* If the entry is not a prefetched entry, verify that the flush + * dependency parents addresses array has been transferred. + * + * If the entry is prefetched, the free_isr routine will dispose of + * the flush dependency parents addresses array if necessary. + */ + if (!entry_ptr->prefetched) { - HDassert(0 == entry_ptr->fd_parent_count); - HDassert(NULL == entry_ptr->fd_parent_addrs); + HDassert(0 == entry_ptr->fd_parent_count); + HDassert(NULL == entry_ptr->fd_parent_addrs); - } /* end if */ + } /* end if */ - /* Check whether we should free the space in the file that - * the entry occupies - */ - if (free_file_space) { + /* Check whether we should free the space in the file that + * the entry occupies + */ + if (free_file_space) { - hsize_t fsf_size; + hsize_t fsf_size; - /* Sanity checks */ - HDassert(H5F_addr_defined(entry_ptr->addr)); - HDassert(!H5F_IS_TMP_ADDR(f, entry_ptr->addr)); + /* Sanity checks */ + HDassert(H5F_addr_defined(entry_ptr->addr)); + HDassert(!H5F_IS_TMP_ADDR(f, entry_ptr->addr)); #ifndef NDEBUG - { - size_t curr_len; + { + size_t curr_len; - /* Get the actual image size for the thing again */ - entry_ptr->type->image_len((void *)entry_ptr, &curr_len); - HDassert(curr_len == entry_ptr->size); - } + /* Get the actual image size for the thing again */ + entry_ptr->type->image_len((void *)entry_ptr, &curr_len); + HDassert(curr_len == entry_ptr->size); + } #endif /* NDEBUG */ - /* If the file space free size callback is defined, use - * it to get the size of the block of file space to free. - * Otherwise use entry_ptr->size. - */ - if (entry_ptr->type->fsf_size) { + /* If the file space free size callback is defined, use + * it to get the size of the block of file space to free. + * Otherwise use entry_ptr->size. + */ + if (entry_ptr->type->fsf_size) { - if ((entry_ptr->type->fsf_size)((void *)entry_ptr, &fsf_size) < 0) + if ((entry_ptr->type->fsf_size)((void *)entry_ptr, &fsf_size) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFREE, FAIL, "unable to get file space free size") + HGOTO_ERROR(H5E_CACHE, H5E_CANTFREE, FAIL, "unable to get file space free size") - } /* end if */ - else { /* no file space free size callback -- use entry size */ + } /* end if */ + else { /* no file space free size callback -- use entry size */ - fsf_size = entry_ptr->size; - } + fsf_size = entry_ptr->size; + } - /* Release the space on disk */ - if (H5MF_xfree(f, entry_ptr->type->mem_type, entry_ptr->addr, fsf_size) < 0) + /* Release the space on disk */ + if (H5MF_xfree(f, entry_ptr->type->mem_type, entry_ptr->addr, fsf_size) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFREE, FAIL, "unable to free file space for cache entry") + HGOTO_ERROR(H5E_CACHE, H5E_CANTFREE, FAIL, "unable to free file space for cache entry") - } /* end if ( free_file_space ) */ + } /* end if ( free_file_space ) */ - /* Reset the pointer to the cache the entry is within. -QAK */ - entry_ptr->cache_ptr = NULL; + /* Reset the pointer to the cache the entry is within. -QAK */ + entry_ptr->cache_ptr = NULL; - /* increment entries_removed_counter and set - * last_entry_removed_ptr. As we are likely abuut to - * free the entry, recall that last_entry_removed_ptr - * must NEVER be dereferenced. - * - * Recall that these fields are maintained to allow functions - * that perform scans of lists of entries to detect the - * unexpected removal of entries (via expunge, eviction, - * or take ownership at present), so that they can re-start - * their scans if necessary. - * - * Also check if the entry we are watching for removal is being - * removed (usually the 'next' entry for an iteration) and reset - * it to indicate that it was removed. - */ - cache_ptr->entries_removed_counter++; - cache_ptr->last_entry_removed_ptr = entry_ptr; + /* increment entries_removed_counter and set + * last_entry_removed_ptr. As we are likely abuut to + * free the entry, recall that last_entry_removed_ptr + * must NEVER be dereferenced. + * + * Recall that these fields are maintained to allow functions + * that perform scans of lists of entries to detect the + * unexpected removal of entries (via expunge, eviction, + * or take ownership at present), so that they can re-start + * their scans if necessary. + * + * Also check if the entry we are watching for removal is being + * removed (usually the 'next' entry for an iteration) and reset + * it to indicate that it was removed. + */ + cache_ptr->entries_removed_counter++; + cache_ptr->last_entry_removed_ptr = entry_ptr; - if (entry_ptr == cache_ptr->entry_watched_for_removal) { + if (entry_ptr == cache_ptr->entry_watched_for_removal) { - cache_ptr->entry_watched_for_removal = NULL; - } + cache_ptr->entry_watched_for_removal = NULL; + } - /* Check for actually destroying the entry in memory */ - /* (As opposed to taking ownership of it) */ - if (destroy_entry) { + /* Check for actually destroying the entry in memory */ + /* (As opposed to taking ownership of it) */ + if (destroy_entry) { - if (entry_ptr->is_dirty) { + if (entry_ptr->is_dirty) { - /* Reset dirty flag */ - entry_ptr->is_dirty = FALSE; + /* Reset dirty flag */ + entry_ptr->is_dirty = FALSE; - /* If the entry's type has a 'notify' callback send a - * 'entry cleaned' notice now that the entry is fully - * integrated into the cache. - */ - if ((entry_ptr->type->notify) && - ((entry_ptr->type->notify)(H5C_NOTIFY_ACTION_ENTRY_CLEANED, entry_ptr) < 0)) + /* If the entry's type has a 'notify' callback send a + * 'entry cleaned' notice now that the entry is fully + * integrated into the cache. + */ + if ((entry_ptr->type->notify) && + ((entry_ptr->type->notify)(H5C_NOTIFY_ACTION_ENTRY_CLEANED, entry_ptr) < 0)) - HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, - "can't notify client about entry dirty flag cleared") + HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, + "can't notify client about entry dirty flag cleared") - } /* end if */ + } /* end if */ - /* we are about to discard the in core representation -- - * set the magic field to bad magic so we can detect a - * freed entry if we see one. - */ - entry_ptr->magic = H5C__H5C_CACHE_ENTRY_T_BAD_MAGIC; + /* we are about to discard the in core representation -- + * set the magic field to bad magic so we can detect a + * freed entry if we see one. + */ + entry_ptr->magic = H5C__H5C_CACHE_ENTRY_T_BAD_MAGIC; - /* verify that the image has been freed */ - HDassert(entry_ptr->image_ptr == NULL); + /* verify that the image has been freed */ + HDassert(entry_ptr->image_ptr == NULL); - if (entry_ptr->type->free_icr((void *)entry_ptr) < 0) + if (entry_ptr->type->free_icr((void *)entry_ptr) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "free_icr callback failed") + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "free_icr callback failed") - } /* end if */ - else { + } /* end if */ + else { - HDassert(take_ownership); + HDassert(take_ownership); - /* client is taking ownership of the entry. - * set bad magic here too so the cache will choke - * unless the entry is re-inserted properly - */ - entry_ptr->magic = H5C__H5C_CACHE_ENTRY_T_BAD_MAGIC; + /* client is taking ownership of the entry. + * set bad magic here too so the cache will choke + * unless the entry is re-inserted properly + */ + entry_ptr->magic = H5C__H5C_CACHE_ENTRY_T_BAD_MAGIC; - } /* end else */ - } /* if (destroy) */ + } /* end else */ + } /* if (destroy) */ - /* Check if we have to update the page buffer with cleared entries - * so it doesn't go out of date - */ - if (update_page_buffer) { + /* Check if we have to update the page buffer with cleared entries + * so it doesn't go out of date + */ + if (update_page_buffer) { - /* Sanity check */ - HDassert(!destroy); - HDassert(entry_ptr->image_ptr); + /* Sanity check */ + HDassert(!destroy); + HDassert(entry_ptr->image_ptr); - if ((f->shared->page_buf) && (f->shared->page_buf->page_size >= entry_ptr->size)) { + if ((f->shared->page_buf) && (f->shared->page_buf->page_size >= entry_ptr->size)) { - if (H5PB_update_entry(f->shared->page_buf, entry_ptr->addr, entry_ptr->size, - entry_ptr->image_ptr) > 0) + if (H5PB_update_entry(f->shared->page_buf, entry_ptr->addr, entry_ptr->size, + entry_ptr->image_ptr) > 0) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Failed to update PB with metadata cache") - } /* end if */ - } /* end if */ + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Failed to update PB with metadata cache") + } /* end if */ + } /* end if */ - if (cache_ptr->log_flush) { + if (cache_ptr->log_flush) { - if ((cache_ptr->log_flush)(cache_ptr, entry_addr, was_dirty, flags) < 0) + if ((cache_ptr->log_flush)(cache_ptr, entry_addr, was_dirty, flags) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "log_flush callback failed") + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "log_flush callback failed") - } /* end if */ + } /* end if */ done: - HDassert((ret_value != SUCCEED) || (destroy_entry) || (!entry_ptr->flush_in_progress)); + HDassert((ret_value != SUCCEED) || (destroy_entry) || (!entry_ptr->flush_in_progress)); - HDassert((ret_value != SUCCEED) || (destroy_entry) || (take_ownership) || (!entry_ptr->is_dirty)); + HDassert((ret_value != SUCCEED) || (destroy_entry) || (take_ownership) || (!entry_ptr->is_dirty)); - FUNC_LEAVE_NOAPI(ret_value) + FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__flush_single_entry() */ +} /* H5C__flush_single_entry() */ - /*------------------------------------------------------------------------- - * - * Function: H5C__verify_len_eoa - * - * Purpose: Verify that 'len' does not exceed eoa when 'actual' is - * false i.e. 'len" is the initial speculative length from - * get_load_size callback with null image pointer. - * If exceed, adjust 'len' accordingly. - * - * Verify that 'len' should not exceed eoa when 'actual' is - * true i.e. 'len' is the actual length from get_load_size - * callback with non-null image pointer. - * If exceed, return error. - * - * Return: FAIL if error is detected, SUCCEED otherwise. - * - * Programmer: Vailin Choi - * 9/6/15 - * - *------------------------------------------------------------------------- - */ - static herr_t H5C__verify_len_eoa(H5F_t * f, const H5C_class_t *type, haddr_t addr, size_t *len, - hbool_t actual) - { - H5FD_mem_t cooked_type; /* Modified type, accounting for switching global heaps */ - haddr_t eoa; /* End-of-allocation in the file */ - herr_t ret_value = SUCCEED; /* Return value */ +/*------------------------------------------------------------------------- + * + * Function: H5C__verify_len_eoa + * + * Purpose: Verify that 'len' does not exceed eoa when 'actual' is + * false i.e. 'len" is the initial speculative length from + * get_load_size callback with null image pointer. + * If exceed, adjust 'len' accordingly. + * + * Verify that 'len' should not exceed eoa when 'actual' is + * true i.e. 'len' is the actual length from get_load_size + * callback with non-null image pointer. + * If exceed, return error. + * + * Return: FAIL if error is detected, SUCCEED otherwise. + * + * Programmer: Vailin Choi + * 9/6/15 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C__verify_len_eoa(H5F_t *f, const H5C_class_t *type, haddr_t addr, size_t *len, hbool_t actual) +{ + H5FD_mem_t cooked_type; /* Modified type, accounting for switching global heaps */ + haddr_t eoa; /* End-of-allocation in the file */ + herr_t ret_value = SUCCEED; /* Return value */ - FUNC_ENTER_STATIC + FUNC_ENTER_STATIC - /* if type == H5FD_MEM_GHEAP, H5F_block_read() forces - * type to H5FD_MEM_DRAW via its call to H5F__accum_read(). - * Thus we do the same for purposes of computing the EOA - * for sanity checks. - */ - cooked_type = (type->mem_type == H5FD_MEM_GHEAP) ? H5FD_MEM_DRAW : type->mem_type; + /* if type == H5FD_MEM_GHEAP, H5F_block_read() forces + * type to H5FD_MEM_DRAW via its call to H5F__accum_read(). + * Thus we do the same for purposes of computing the EOA + * for sanity checks. + */ + cooked_type = (type->mem_type == H5FD_MEM_GHEAP) ? H5FD_MEM_DRAW : type->mem_type; - /* Get the file's end-of-allocation value */ - eoa = H5F_get_eoa(f, cooked_type); - if (!H5F_addr_defined(eoa)) - HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, FAIL, "invalid EOA address for file") + /* Get the file's end-of-allocation value */ + eoa = H5F_get_eoa(f, cooked_type); + if (!H5F_addr_defined(eoa)) + HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, FAIL, "invalid EOA address for file") - /* Check for bad address in general */ - if (H5F_addr_gt(addr, eoa)) - HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, FAIL, "address of object past end of allocation") + /* Check for bad address in general */ + if (H5F_addr_gt(addr, eoa)) + HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, FAIL, "address of object past end of allocation") - /* Check if the amount of data to read will be past the EOA */ - if (H5F_addr_gt((addr + *len), eoa)) { - if (actual) - HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, FAIL, "actual len exceeds EOA") - else - /* Trim down the length of the metadata */ - *len = (size_t)(eoa - addr); - } /* end if */ + /* Check if the amount of data to read will be past the EOA */ + if (H5F_addr_gt((addr + *len), eoa)) { + if (actual) + HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, FAIL, "actual len exceeds EOA") + else + /* Trim down the length of the metadata */ + *len = (size_t)(eoa - addr); + } /* end if */ - if (*len <= 0) - HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, FAIL, "len not positive after adjustment for EOA") + if (*len <= 0) + HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, FAIL, "len not positive after adjustment for EOA") done: - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__verify_len_eoa() */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C__verify_len_eoa() */ - /*------------------------------------------------------------------------- - * - * Function: H5C_load_entry - * - * Purpose: Attempt to load the entry at the specified disk address - * and with the specified type into memory. If successful. - * return the in memory address of the entry. Return NULL - * on failure. - * - * Note that this function simply loads the entry into - * core. It does not insert it into the cache. - * - * Return: Non-NULL on success / NULL on failure. - * - * Programmer: John Mainzer, 5/18/04 - * - *------------------------------------------------------------------------- - */ - static void *H5C_load_entry(H5F_t * f, +/*------------------------------------------------------------------------- + * + * Function: H5C_load_entry + * + * Purpose: Attempt to load the entry at the specified disk address + * and with the specified type into memory. If successful. + * return the in memory address of the entry. Return NULL + * on failure. + * + * Note that this function simply loads the entry into + * core. It does not insert it into the cache. + * + * Return: Non-NULL on success / NULL on failure. + * + * Programmer: John Mainzer, 5/18/04 + * + *------------------------------------------------------------------------- + */ +static void * +H5C_load_entry(H5F_t *f, #ifdef H5_HAVE_PARALLEL - hbool_t coll_access, + hbool_t coll_access, #endif /* H5_HAVE_PARALLEL */ - const H5C_class_t *type, haddr_t addr, void *udata) - { - hbool_t dirty = FALSE; /* Flag indicating whether thing was dirtied during deserialize */ - uint8_t *image = NULL; /* Buffer for disk image */ - void *thing = NULL; /* Pointer to thing loaded */ - H5C_cache_entry_t *entry = NULL; /* Alias for thing loaded, as cache entry */ - size_t len; /* Size of image in file */ + const H5C_class_t *type, haddr_t addr, void *udata) +{ + hbool_t dirty = FALSE; /* Flag indicating whether thing was dirtied during deserialize */ + uint8_t *image = NULL; /* Buffer for disk image */ + void *thing = NULL; /* Pointer to thing loaded */ + H5C_cache_entry_t *entry = NULL; /* Alias for thing loaded, as cache entry */ + size_t len; /* Size of image in file */ #ifdef H5_HAVE_PARALLEL - int mpi_rank = 0; /* MPI process rank */ - MPI_Comm comm = MPI_COMM_NULL; /* File MPI Communicator */ - int mpi_code; /* MPI error code */ -#endif /* H5_HAVE_PARALLEL */ - void *ret_value = NULL; /* Return value */ + int mpi_rank = 0; /* MPI process rank */ + MPI_Comm comm = MPI_COMM_NULL; /* File MPI Communicator */ + int mpi_code; /* MPI error code */ +#endif /* H5_HAVE_PARALLEL */ + void *ret_value = NULL; /* Return value */ - FUNC_ENTER_NOAPI_NOINIT + FUNC_ENTER_NOAPI_NOINIT - /* Sanity checks */ - HDassert(f); - HDassert(f->shared); - HDassert(f->shared->cache); - HDassert(type); - HDassert(H5F_addr_defined(addr)); - HDassert(type->get_initial_load_size); - if (type->flags & H5C__CLASS_SPECULATIVE_LOAD_FLAG) - HDassert(type->get_final_load_size); - else - HDassert(NULL == type->get_final_load_size); - HDassert(type->deserialize); + /* Sanity checks */ + HDassert(f); + HDassert(f->shared); + HDassert(f->shared->cache); + HDassert(type); + HDassert(H5F_addr_defined(addr)); + HDassert(type->get_initial_load_size); + if (type->flags & H5C__CLASS_SPECULATIVE_LOAD_FLAG) + HDassert(type->get_final_load_size); + else + HDassert(NULL == type->get_final_load_size); + HDassert(type->deserialize); - /* Can't see how skip reads could be usefully combined with - * the speculative read flag. Hence disallow. - */ - HDassert( - !((type->flags & H5C__CLASS_SKIP_READS) && (type->flags & H5C__CLASS_SPECULATIVE_LOAD_FLAG))); - - /* Call the get_initial_load_size callback, to retrieve the initial size of image */ - if (type->get_initial_load_size(udata, &len) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, NULL, "can't retrieve image size") - HDassert(len > 0); - - /* Check for possible speculative read off the end of the file */ - if (type->flags & H5C__CLASS_SPECULATIVE_LOAD_FLAG) - if (H5C__verify_len_eoa(f, type, addr, &len, FALSE) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, NULL, "invalid len with respect to EOA") - - /* Allocate the buffer for reading the on-disk entry image */ - if (NULL == (image = (uint8_t *)H5MM_malloc(len + H5C_IMAGE_EXTRA_SPACE))) - HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, NULL, "memory allocation failed for on disk image buffer") + /* Can't see how skip reads could be usefully combined with + * the speculative read flag. Hence disallow. + */ + HDassert(!((type->flags & H5C__CLASS_SKIP_READS) && (type->flags & H5C__CLASS_SPECULATIVE_LOAD_FLAG))); + + /* Call the get_initial_load_size callback, to retrieve the initial size of image */ + if (type->get_initial_load_size(udata, &len) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, NULL, "can't retrieve image size") + HDassert(len > 0); + + /* Check for possible speculative read off the end of the file */ + if (type->flags & H5C__CLASS_SPECULATIVE_LOAD_FLAG) + if (H5C__verify_len_eoa(f, type, addr, &len, FALSE) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, NULL, "invalid len with respect to EOA") + + /* Allocate the buffer for reading the on-disk entry image */ + if (NULL == (image = (uint8_t *)H5MM_malloc(len + H5C_IMAGE_EXTRA_SPACE))) + HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, NULL, "memory allocation failed for on disk image buffer") #if H5C_DO_MEMORY_SANITY_CHECKS - H5MM_memcpy(image + len, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE); + H5MM_memcpy(image + len, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE); #endif /* H5C_DO_MEMORY_SANITY_CHECKS */ #ifdef H5_HAVE_PARALLEL - if (H5F_HAS_FEATURE(f, H5FD_FEAT_HAS_MPI)) { - if ((mpi_rank = H5F_mpi_get_rank(f)) < 0) - HGOTO_ERROR(H5E_FILE, H5E_CANTGET, NULL, "Can't get MPI rank") - if ((comm = H5F_mpi_get_comm(f)) == MPI_COMM_NULL) - HGOTO_ERROR(H5E_FILE, H5E_CANTGET, NULL, "get_comm request failed") - } /* end if */ -#endif /* H5_HAVE_PARALLEL */ + if (H5F_HAS_FEATURE(f, H5FD_FEAT_HAS_MPI)) { + if ((mpi_rank = H5F_mpi_get_rank(f)) < 0) + HGOTO_ERROR(H5E_FILE, H5E_CANTGET, NULL, "Can't get MPI rank") + if ((comm = H5F_mpi_get_comm(f)) == MPI_COMM_NULL) + HGOTO_ERROR(H5E_FILE, H5E_CANTGET, NULL, "get_comm request failed") + } /* end if */ +#endif /* H5_HAVE_PARALLEL */ - /* Get the on-disk entry image */ - if (0 == (type->flags & H5C__CLASS_SKIP_READS)) { - unsigned tries, max_tries; /* The # of read attempts */ - unsigned retries; /* The # of retries */ - htri_t chk_ret; /* return from verify_chksum callback */ - size_t actual_len = len; /* The actual length, after speculative reads have been resolved */ - uint64_t nanosec = 1; /* # of nanoseconds to sleep between retries */ - void *new_image; /* Pointer to image */ - hbool_t len_changed = TRUE; /* Whether to re-check speculative entries */ - - /* Get the # of read attempts */ - max_tries = tries = H5F_GET_READ_ATTEMPTS(f); - - /* - * This do/while loop performs the following till the metadata checksum - * is correct or the file's number of allowed read attempts are reached. - * --read the metadata - * --determine the actual size of the metadata - * --perform checksum verification - */ - do { - if (actual_len != len) { - if (NULL == (new_image = H5MM_realloc(image, len + H5C_IMAGE_EXTRA_SPACE))) - HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, NULL, "image null after H5MM_realloc()") - image = (uint8_t *)new_image; + /* Get the on-disk entry image */ + if (0 == (type->flags & H5C__CLASS_SKIP_READS)) { + unsigned tries, max_tries; /* The # of read attempts */ + unsigned retries; /* The # of retries */ + htri_t chk_ret; /* return from verify_chksum callback */ + size_t actual_len = len; /* The actual length, after speculative reads have been resolved */ + uint64_t nanosec = 1; /* # of nanoseconds to sleep between retries */ + void *new_image; /* Pointer to image */ + hbool_t len_changed = TRUE; /* Whether to re-check speculative entries */ + + /* Get the # of read attempts */ + max_tries = tries = H5F_GET_READ_ATTEMPTS(f); + + /* + * This do/while loop performs the following till the metadata checksum + * is correct or the file's number of allowed read attempts are reached. + * --read the metadata + * --determine the actual size of the metadata + * --perform checksum verification + */ + do { + if (actual_len != len) { + if (NULL == (new_image = H5MM_realloc(image, len + H5C_IMAGE_EXTRA_SPACE))) + HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, NULL, "image null after H5MM_realloc()") + image = (uint8_t *)new_image; #if H5C_DO_MEMORY_SANITY_CHECKS - H5MM_memcpy(image + len, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE); -#endif /* H5C_DO_MEMORY_SANITY_CHECKS */ - } /* end if */ + H5MM_memcpy(image + len, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE); +#endif /* H5C_DO_MEMORY_SANITY_CHECKS */ + } /* end if */ #ifdef H5_HAVE_PARALLEL - if (!coll_access || 0 == mpi_rank) { + if (!coll_access || 0 == mpi_rank) { #endif /* H5_HAVE_PARALLEL */ - if (H5F_block_read(f, type->mem_type, addr, len, image) < 0) { + if (H5F_block_read(f, type->mem_type, addr, len, image) < 0) { #ifdef H5_HAVE_PARALLEL - if (coll_access) { - /* Push an error, but still participate in following MPI_Bcast */ - HDmemset(image, 0, len); - HDONE_ERROR(H5E_CACHE, H5E_READERROR, NULL, "Can't read image*") - } - else -#endif - HGOTO_ERROR(H5E_CACHE, H5E_READERROR, NULL, "Can't read image*") + if (coll_access) { + /* Push an error, but still participate in following MPI_Bcast */ + HDmemset(image, 0, len); + HDONE_ERROR(H5E_CACHE, H5E_READERROR, NULL, "Can't read image*") } + else +#endif + HGOTO_ERROR(H5E_CACHE, H5E_READERROR, NULL, "Can't read image*") + } #ifdef H5_HAVE_PARALLEL - } /* end if */ - /* if the collective metadata read optimization is turned on, - * bcast the metadata read from process 0 to all ranks in the file - * communicator - */ - if (coll_access) { - int buf_size; + } /* end if */ + /* if the collective metadata read optimization is turned on, + * bcast the metadata read from process 0 to all ranks in the file + * communicator + */ + if (coll_access) { + int buf_size; - H5_CHECKED_ASSIGN(buf_size, int, len, size_t); - if (MPI_SUCCESS != (mpi_code = MPI_Bcast(image, buf_size, MPI_BYTE, 0, comm))) - HMPI_GOTO_ERROR(NULL, "MPI_Bcast failed", mpi_code) - } /* end if */ -#endif /* H5_HAVE_PARALLEL */ + H5_CHECKED_ASSIGN(buf_size, int, len, size_t); + if (MPI_SUCCESS != (mpi_code = MPI_Bcast(image, buf_size, MPI_BYTE, 0, comm))) + HMPI_GOTO_ERROR(NULL, "MPI_Bcast failed", mpi_code) + } /* end if */ +#endif /* H5_HAVE_PARALLEL */ - /* If the entry could be read speculatively and the length is still - * changing, check for updating the actual size - */ - if ((type->flags & H5C__CLASS_SPECULATIVE_LOAD_FLAG) && len_changed) { - /* Retrieve the actual length */ - actual_len = len; - if (type->get_final_load_size(image, len, udata, &actual_len) < 0) - continue; /* Transfer control to while() and count towards retries */ - - /* Check for the length changing */ - if (actual_len != len) { - /* Verify that the length isn't past the EOA for the file */ - if (H5C__verify_len_eoa(f, type, addr, &actual_len, TRUE) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, NULL, "actual_len exceeds EOA") - - /* Expand buffer to new size */ - if (NULL == (new_image = H5MM_realloc(image, actual_len + H5C_IMAGE_EXTRA_SPACE))) - HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, NULL, "image null after H5MM_realloc()") - image = (uint8_t *)new_image; + /* If the entry could be read speculatively and the length is still + * changing, check for updating the actual size + */ + if ((type->flags & H5C__CLASS_SPECULATIVE_LOAD_FLAG) && len_changed) { + /* Retrieve the actual length */ + actual_len = len; + if (type->get_final_load_size(image, len, udata, &actual_len) < 0) + continue; /* Transfer control to while() and count towards retries */ + + /* Check for the length changing */ + if (actual_len != len) { + /* Verify that the length isn't past the EOA for the file */ + if (H5C__verify_len_eoa(f, type, addr, &actual_len, TRUE) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, NULL, "actual_len exceeds EOA") + + /* Expand buffer to new size */ + if (NULL == (new_image = H5MM_realloc(image, actual_len + H5C_IMAGE_EXTRA_SPACE))) + HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, NULL, "image null after H5MM_realloc()") + image = (uint8_t *)new_image; #if H5C_DO_MEMORY_SANITY_CHECKS - H5MM_memcpy(image + actual_len, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE); + H5MM_memcpy(image + actual_len, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE); #endif /* H5C_DO_MEMORY_SANITY_CHECKS */ - if (actual_len > len) { + if (actual_len > len) { #ifdef H5_HAVE_PARALLEL - if (!coll_access || 0 == mpi_rank) { + if (!coll_access || 0 == mpi_rank) { #endif /* H5_HAVE_PARALLEL */ - /* If the thing's image needs to be bigger for a speculatively - * loaded thing, go get the on-disk image again (the extra portion). - */ - if (H5F_block_read(f, type->mem_type, addr + len, actual_len - len, - image + len) < 0) { + /* If the thing's image needs to be bigger for a speculatively + * loaded thing, go get the on-disk image again (the extra portion). + */ + if (H5F_block_read(f, type->mem_type, addr + len, actual_len - len, image + len) < + 0) { #ifdef H5_HAVE_PARALLEL - if (coll_access) { - /* Push an error, but still participate in following MPI_Bcast */ - HDmemset(image + len, 0, actual_len - len); - HDONE_ERROR(H5E_CACHE, H5E_CANTLOAD, NULL, "can't read image") - } - else -#endif - HGOTO_ERROR(H5E_CACHE, H5E_CANTLOAD, NULL, "can't read image") + if (coll_access) { + /* Push an error, but still participate in following MPI_Bcast */ + HDmemset(image + len, 0, actual_len - len); + HDONE_ERROR(H5E_CACHE, H5E_CANTLOAD, NULL, "can't read image") } + else +#endif + HGOTO_ERROR(H5E_CACHE, H5E_CANTLOAD, NULL, "can't read image") + } #ifdef H5_HAVE_PARALLEL - } - /* If the collective metadata read optimization is turned on, - * Bcast the metadata read from process 0 to all ranks in the file - * communicator */ - if (coll_access) { - int buf_size; - - H5_CHECKED_ASSIGN(buf_size, int, actual_len - len, size_t); - if (MPI_SUCCESS != - (mpi_code = MPI_Bcast(image + len, buf_size, MPI_BYTE, 0, comm))) - HMPI_GOTO_ERROR(NULL, "MPI_Bcast failed", mpi_code) - } /* end if */ -#endif /* H5_HAVE_PARALLEL */ - } /* end if */ - } /* end if (actual_len != len) */ - else { - /* The length has stabilized */ - len_changed = FALSE; + } + /* If the collective metadata read optimization is turned on, + * Bcast the metadata read from process 0 to all ranks in the file + * communicator */ + if (coll_access) { + int buf_size; - /* Set the final length */ - len = actual_len; - } /* else */ - } /* end if */ + H5_CHECKED_ASSIGN(buf_size, int, actual_len - len, size_t); + if (MPI_SUCCESS != + (mpi_code = MPI_Bcast(image + len, buf_size, MPI_BYTE, 0, comm))) + HMPI_GOTO_ERROR(NULL, "MPI_Bcast failed", mpi_code) + } /* end if */ +#endif /* H5_HAVE_PARALLEL */ + } /* end if */ + } /* end if (actual_len != len) */ + else { + /* The length has stabilized */ + len_changed = FALSE; - /* If there's no way to verify the checksum for a piece of metadata - * (usually because there's no checksum in the file), leave now - */ - if (type->verify_chksum == NULL) - break; + /* Set the final length */ + len = actual_len; + } /* else */ + } /* end if */ - /* Verify the checksum for the metadata image */ - if ((chk_ret = type->verify_chksum(image, actual_len, udata)) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, NULL, "failure from verify_chksum callback") - if (chk_ret == TRUE) - break; + /* If there's no way to verify the checksum for a piece of metadata + * (usually because there's no checksum in the file), leave now + */ + if (type->verify_chksum == NULL) + break; - /* Sleep for some time */ - H5_nanosleep(nanosec); - nanosec *= 2; /* Double the sleep time next time */ - } while (--tries); + /* Verify the checksum for the metadata image */ + if ((chk_ret = type->verify_chksum(image, actual_len, udata)) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, NULL, "failure from verify_chksum callback") + if (chk_ret == TRUE) + break; - /* Check for too many tries */ - if (tries == 0) - HGOTO_ERROR(H5E_CACHE, H5E_READERROR, NULL, - "incorrect metadata checksum after all read attempts") + /* Sleep for some time */ + H5_nanosleep(nanosec); + nanosec *= 2; /* Double the sleep time next time */ + } while (--tries); - /* Calculate and track the # of retries */ - retries = max_tries - tries; - if (retries) /* Does not track 0 retry */ - if (H5F_track_metadata_read_retries(f, (unsigned)type->mem_type, retries) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, NULL, "cannot track read tries = %u ", retries) + /* Check for too many tries */ + if (tries == 0) + HGOTO_ERROR(H5E_CACHE, H5E_READERROR, NULL, "incorrect metadata checksum after all read attempts") - /* Set the final length (in case it wasn't set earlier) */ - len = actual_len; - } /* end if !H5C__CLASS_SKIP_READS */ + /* Calculate and track the # of retries */ + retries = max_tries - tries; + if (retries) /* Does not track 0 retry */ + if (H5F_track_metadata_read_retries(f, (unsigned)type->mem_type, retries) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, NULL, "cannot track read tries = %u ", retries) - /* Deserialize the on-disk image into the native memory form */ - if (NULL == (thing = type->deserialize(image, len, udata, &dirty))) - HGOTO_ERROR(H5E_CACHE, H5E_CANTLOAD, NULL, "Can't deserialize image") + /* Set the final length (in case it wasn't set earlier) */ + len = actual_len; + } /* end if !H5C__CLASS_SKIP_READS */ - entry = (H5C_cache_entry_t *)thing; + /* Deserialize the on-disk image into the native memory form */ + if (NULL == (thing = type->deserialize(image, len, udata, &dirty))) + HGOTO_ERROR(H5E_CACHE, H5E_CANTLOAD, NULL, "Can't deserialize image") - /* In general, an entry should be clean just after it is loaded. - * - * However, when this code is used in the metadata cache, it is - * possible that object headers will be dirty at this point, as - * the deserialize function will alter object headers if necessary to - * fix an old bug. - * - * In the following assert: - * - * HDassert( ( dirty == FALSE ) || ( type->id == 5 || type->id == 6 ) ); - * - * note that type ids 5 & 6 are associated with object headers in the - * metadata cache. - * - * When we get to using H5C for other purposes, we may wish to - * tighten up the assert so that the loophole only applies to the - * metadata cache. - */ + entry = (H5C_cache_entry_t *)thing; + + /* In general, an entry should be clean just after it is loaded. + * + * However, when this code is used in the metadata cache, it is + * possible that object headers will be dirty at this point, as + * the deserialize function will alter object headers if necessary to + * fix an old bug. + * + * In the following assert: + * + * HDassert( ( dirty == FALSE ) || ( type->id == 5 || type->id == 6 ) ); + * + * note that type ids 5 & 6 are associated with object headers in the + * metadata cache. + * + * When we get to using H5C for other purposes, we may wish to + * tighten up the assert so that the loophole only applies to the + * metadata cache. + */ - HDassert((dirty == FALSE) || (type->id == 5 || type->id == 6)); - - entry->magic = H5C__H5C_CACHE_ENTRY_T_MAGIC; - entry->cache_ptr = f->shared->cache; - entry->addr = addr; - entry->size = len; - HDassert(entry->size < H5C_MAX_ENTRY_SIZE); - entry->image_ptr = image; - entry->image_up_to_date = !dirty; - entry->type = type; - entry->is_dirty = dirty; - entry->dirtied = FALSE; - entry->is_protected = FALSE; - entry->is_read_only = FALSE; - entry->ro_ref_count = 0; - entry->is_pinned = FALSE; - entry->in_slist = FALSE; - entry->flush_marker = FALSE; + HDassert((dirty == FALSE) || (type->id == 5 || type->id == 6)); + + entry->magic = H5C__H5C_CACHE_ENTRY_T_MAGIC; + entry->cache_ptr = f->shared->cache; + entry->addr = addr; + entry->size = len; + HDassert(entry->size < H5C_MAX_ENTRY_SIZE); + entry->image_ptr = image; + entry->image_up_to_date = !dirty; + entry->type = type; + entry->is_dirty = dirty; + entry->dirtied = FALSE; + entry->is_protected = FALSE; + entry->is_read_only = FALSE; + entry->ro_ref_count = 0; + entry->is_pinned = FALSE; + entry->in_slist = FALSE; + entry->flush_marker = FALSE; #ifdef H5_HAVE_PARALLEL - entry->clear_on_unprotect = FALSE; - entry->flush_immediately = FALSE; - entry->coll_access = coll_access; + entry->clear_on_unprotect = FALSE; + entry->flush_immediately = FALSE; + entry->coll_access = coll_access; #endif /* H5_HAVE_PARALLEL */ - entry->flush_in_progress = FALSE; - entry->destroy_in_progress = FALSE; - - entry->ring = H5C_RING_UNDEFINED; - - /* Initialize flush dependency fields */ - entry->flush_dep_parent = NULL; - entry->flush_dep_nparents = 0; - entry->flush_dep_parent_nalloc = 0; - entry->flush_dep_nchildren = 0; - entry->flush_dep_ndirty_children = 0; - entry->flush_dep_nunser_children = 0; - entry->ht_next = NULL; - entry->ht_prev = NULL; - entry->il_next = NULL; - entry->il_prev = NULL; - - entry->next = NULL; - entry->prev = NULL; + entry->flush_in_progress = FALSE; + entry->destroy_in_progress = FALSE; + + entry->ring = H5C_RING_UNDEFINED; + + /* Initialize flush dependency fields */ + entry->flush_dep_parent = NULL; + entry->flush_dep_nparents = 0; + entry->flush_dep_parent_nalloc = 0; + entry->flush_dep_nchildren = 0; + entry->flush_dep_ndirty_children = 0; + entry->flush_dep_nunser_children = 0; + entry->ht_next = NULL; + entry->ht_prev = NULL; + entry->il_next = NULL; + entry->il_prev = NULL; + + entry->next = NULL; + entry->prev = NULL; #if H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS - entry->aux_next = NULL; - entry->aux_prev = NULL; + entry->aux_next = NULL; + entry->aux_prev = NULL; #endif /* H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS */ #ifdef H5_HAVE_PARALLEL - entry->coll_next = NULL; - entry->coll_prev = NULL; + entry->coll_next = NULL; + entry->coll_prev = NULL; #endif /* H5_HAVE_PARALLEL */ - /* initialize cache image related fields */ - entry->include_in_image = FALSE; - entry->lru_rank = 0; - entry->image_dirty = FALSE; - entry->fd_parent_count = 0; - entry->fd_parent_addrs = NULL; - entry->fd_child_count = 0; - entry->fd_dirty_child_count = 0; - entry->image_fd_height = 0; - entry->prefetched = FALSE; - entry->prefetch_type_id = 0; - entry->age = 0; - entry->prefetched_dirty = FALSE; + /* initialize cache image related fields */ + entry->include_in_image = FALSE; + entry->lru_rank = 0; + entry->image_dirty = FALSE; + entry->fd_parent_count = 0; + entry->fd_parent_addrs = NULL; + entry->fd_child_count = 0; + entry->fd_dirty_child_count = 0; + entry->image_fd_height = 0; + entry->prefetched = FALSE; + entry->prefetch_type_id = 0; + entry->age = 0; + entry->prefetched_dirty = FALSE; #ifndef NDEBUG /* debugging field */ - entry->serialization_count = 0; + entry->serialization_count = 0; #endif /* NDEBUG */ - entry->tl_next = NULL; - entry->tl_prev = NULL; - entry->tag_info = NULL; + entry->tl_next = NULL; + entry->tl_prev = NULL; + entry->tag_info = NULL; - H5C__RESET_CACHE_ENTRY_STATS(entry); + H5C__RESET_CACHE_ENTRY_STATS(entry); - ret_value = thing; + ret_value = thing; done: - /* Cleanup on error */ - if (NULL == ret_value) { - /* Release resources */ - if (thing && type->free_icr(thing) < 0) - HDONE_ERROR(H5E_CACHE, H5E_CANTFLUSH, NULL, "free_icr callback failed") - if (image) - image = (uint8_t *)H5MM_xfree(image); - } /* end if */ + /* Cleanup on error */ + if (NULL == ret_value) { + /* Release resources */ + if (thing && type->free_icr(thing) < 0) + HDONE_ERROR(H5E_CACHE, H5E_CANTFLUSH, NULL, "free_icr callback failed") + if (image) + image = (uint8_t *)H5MM_xfree(image); + } /* end if */ - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C_load_entry() */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C_load_entry() */ - /*------------------------------------------------------------------------- - * - * Function: H5C__make_space_in_cache - * - * Purpose: Attempt to evict cache entries until the index_size - * is at least needed_space below max_cache_size. - * - * In passing, also attempt to bring cLRU_list_size to a - * value greater than min_clean_size. - * - * Depending on circumstances, both of these goals may - * be impossible, as in parallel mode, we must avoid generating - * a write as part of a read (to avoid deadlock in collective - * I/O), and in all cases, it is possible (though hopefully - * highly unlikely) that the protected list may exceed the - * maximum size of the cache. - * - * Thus the function simply does its best, returning success - * unless an error is encountered. - * - * Observe that this function cannot occasion a read. - * - * Return: Non-negative on success/Negative on failure. - * - * Programmer: John Mainzer, 5/14/04 - * - *------------------------------------------------------------------------- - */ - herr_t H5C__make_space_in_cache(H5F_t * f, size_t space_needed, hbool_t write_permitted) - { - H5C_t *cache_ptr = f->shared->cache; +/*------------------------------------------------------------------------- + * + * Function: H5C__make_space_in_cache + * + * Purpose: Attempt to evict cache entries until the index_size + * is at least needed_space below max_cache_size. + * + * In passing, also attempt to bring cLRU_list_size to a + * value greater than min_clean_size. + * + * Depending on circumstances, both of these goals may + * be impossible, as in parallel mode, we must avoid generating + * a write as part of a read (to avoid deadlock in collective + * I/O), and in all cases, it is possible (though hopefully + * highly unlikely) that the protected list may exceed the + * maximum size of the cache. + * + * Thus the function simply does its best, returning success + * unless an error is encountered. + * + * Observe that this function cannot occasion a read. + * + * Return: Non-negative on success/Negative on failure. + * + * Programmer: John Mainzer, 5/14/04 + * + *------------------------------------------------------------------------- + */ +herr_t +H5C__make_space_in_cache(H5F_t *f, size_t space_needed, hbool_t write_permitted) +{ + H5C_t *cache_ptr = f->shared->cache; #if H5C_COLLECT_CACHE_STATS - int32_t clean_entries_skipped = 0; - int32_t dirty_pf_entries_skipped = 0; - int32_t total_entries_scanned = 0; + int32_t clean_entries_skipped = 0; + int32_t dirty_pf_entries_skipped = 0; + int32_t total_entries_scanned = 0; #endif /* H5C_COLLECT_CACHE_STATS */ - uint32_t entries_examined = 0; - uint32_t initial_list_len; - size_t empty_space; - hbool_t reentrant_call = FALSE; - hbool_t prev_is_dirty = FALSE; - hbool_t didnt_flush_entry = FALSE; - hbool_t restart_scan; - H5C_cache_entry_t *entry_ptr; - H5C_cache_entry_t *prev_ptr; - H5C_cache_entry_t *next_ptr; - uint32_t num_corked_entries = 0; - herr_t ret_value = SUCCEED; /* Return value */ - - FUNC_ENTER_PACKAGE + uint32_t entries_examined = 0; + uint32_t initial_list_len; + size_t empty_space; + hbool_t reentrant_call = FALSE; + hbool_t prev_is_dirty = FALSE; + hbool_t didnt_flush_entry = FALSE; + hbool_t restart_scan; + H5C_cache_entry_t *entry_ptr; + H5C_cache_entry_t *prev_ptr; + H5C_cache_entry_t *next_ptr; + uint32_t num_corked_entries = 0; + herr_t ret_value = SUCCEED; /* Return value */ - /* Sanity checks */ - HDassert(f); - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - HDassert(cache_ptr->index_size == (cache_ptr->clean_index_size + cache_ptr->dirty_index_size)); - - /* check to see if cache_ptr->msic_in_progress is TRUE. If it, this - * is a re-entrant call via a client callback called in the make - * space in cache process. To avoid an infinite recursion, set - * reentrant_call to TRUE, and goto done. - */ - if (cache_ptr->msic_in_progress) { - reentrant_call = TRUE; - HGOTO_DONE(SUCCEED); - } /* end if */ + FUNC_ENTER_PACKAGE + + /* Sanity checks */ + HDassert(f); + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(cache_ptr->index_size == (cache_ptr->clean_index_size + cache_ptr->dirty_index_size)); - cache_ptr->msic_in_progress = TRUE; + /* check to see if cache_ptr->msic_in_progress is TRUE. If it, this + * is a re-entrant call via a client callback called in the make + * space in cache process. To avoid an infinite recursion, set + * reentrant_call to TRUE, and goto done. + */ + if (cache_ptr->msic_in_progress) { + reentrant_call = TRUE; + HGOTO_DONE(SUCCEED); + } /* end if */ - if (write_permitted) { - restart_scan = FALSE; - initial_list_len = cache_ptr->LRU_list_len; - entry_ptr = cache_ptr->LRU_tail_ptr; + cache_ptr->msic_in_progress = TRUE; - if (cache_ptr->index_size >= cache_ptr->max_cache_size) - empty_space = 0; - else - empty_space = cache_ptr->max_cache_size - cache_ptr->index_size; + if (write_permitted) { + restart_scan = FALSE; + initial_list_len = cache_ptr->LRU_list_len; + entry_ptr = cache_ptr->LRU_tail_ptr; - while ((((cache_ptr->index_size + space_needed) > cache_ptr->max_cache_size) || - ((empty_space + cache_ptr->clean_index_size) < (cache_ptr->min_clean_size))) && - (entries_examined <= (2 * initial_list_len)) && (entry_ptr != NULL)) { - HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(!(entry_ptr->is_protected)); - HDassert(!(entry_ptr->is_read_only)); - HDassert((entry_ptr->ro_ref_count) == 0); + if (cache_ptr->index_size >= cache_ptr->max_cache_size) + empty_space = 0; + else + empty_space = cache_ptr->max_cache_size - cache_ptr->index_size; - next_ptr = entry_ptr->next; - prev_ptr = entry_ptr->prev; + while ((((cache_ptr->index_size + space_needed) > cache_ptr->max_cache_size) || + ((empty_space + cache_ptr->clean_index_size) < (cache_ptr->min_clean_size))) && + (entries_examined <= (2 * initial_list_len)) && (entry_ptr != NULL)) { + HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(!(entry_ptr->is_protected)); + HDassert(!(entry_ptr->is_read_only)); + HDassert((entry_ptr->ro_ref_count) == 0); - if (prev_ptr != NULL) - prev_is_dirty = prev_ptr->is_dirty; + next_ptr = entry_ptr->next; + prev_ptr = entry_ptr->prev; - if (entry_ptr->is_dirty && (entry_ptr->tag_info && entry_ptr->tag_info->corked)) { + if (prev_ptr != NULL) + prev_is_dirty = prev_ptr->is_dirty; - /* Skip "dirty" corked entries. */ - ++num_corked_entries; - didnt_flush_entry = TRUE; - } - else if (((entry_ptr->type)->id != H5AC_EPOCH_MARKER_ID) && (!entry_ptr->flush_in_progress) && - (!entry_ptr->prefetched_dirty)) { + if (entry_ptr->is_dirty && (entry_ptr->tag_info && entry_ptr->tag_info->corked)) { + + /* Skip "dirty" corked entries. */ + ++num_corked_entries; + didnt_flush_entry = TRUE; + } + else if (((entry_ptr->type)->id != H5AC_EPOCH_MARKER_ID) && (!entry_ptr->flush_in_progress) && + (!entry_ptr->prefetched_dirty)) { - didnt_flush_entry = FALSE; + didnt_flush_entry = FALSE; - if (entry_ptr->is_dirty) { + if (entry_ptr->is_dirty) { #if H5C_COLLECT_CACHE_STATS - if ((cache_ptr->index_size + space_needed) > cache_ptr->max_cache_size) { + if ((cache_ptr->index_size + space_needed) > cache_ptr->max_cache_size) { - cache_ptr->entries_scanned_to_make_space++; - } + cache_ptr->entries_scanned_to_make_space++; + } #endif /* H5C_COLLECT_CACHE_STATS */ - /* reset entries_removed_counter and - * last_entry_removed_ptr prior to the call to - * H5C__flush_single_entry() so that we can spot - * unexpected removals of entries from the cache, - * and set the restart_scan flag if proceeding - * would be likely to cause us to scan an entry - * that is no longer in the cache. - */ - cache_ptr->entries_removed_counter = 0; - cache_ptr->last_entry_removed_ptr = NULL; + /* reset entries_removed_counter and + * last_entry_removed_ptr prior to the call to + * H5C__flush_single_entry() so that we can spot + * unexpected removals of entries from the cache, + * and set the restart_scan flag if proceeding + * would be likely to cause us to scan an entry + * that is no longer in the cache. + */ + cache_ptr->entries_removed_counter = 0; + cache_ptr->last_entry_removed_ptr = NULL; - if (H5C__flush_single_entry(f, entry_ptr, H5C__NO_FLAGS_SET) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush entry") + if (H5C__flush_single_entry(f, entry_ptr, H5C__NO_FLAGS_SET) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush entry") - if ((cache_ptr->entries_removed_counter > 1) || - (cache_ptr->last_entry_removed_ptr == prev_ptr)) + if ((cache_ptr->entries_removed_counter > 1) || + (cache_ptr->last_entry_removed_ptr == prev_ptr)) - restart_scan = TRUE; - } - else if ((cache_ptr->index_size + space_needed) > cache_ptr->max_cache_size + restart_scan = TRUE; + } + else if ((cache_ptr->index_size + space_needed) > cache_ptr->max_cache_size #ifdef H5_HAVE_PARALLEL - && !(entry_ptr->coll_access) + && !(entry_ptr->coll_access) #endif /* H5_HAVE_PARALLEL */ - ) { + ) { #if H5C_COLLECT_CACHE_STATS - cache_ptr->entries_scanned_to_make_space++; + cache_ptr->entries_scanned_to_make_space++; #endif /* H5C_COLLECT_CACHE_STATS */ - if (H5C__flush_single_entry(f, entry_ptr, - H5C__FLUSH_INVALIDATE_FLAG | - H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush entry") - } - else { - /* We have enough space so don't flush clean entry. */ + if (H5C__flush_single_entry(f, entry_ptr, + H5C__FLUSH_INVALIDATE_FLAG | + H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush entry") + } + else { + /* We have enough space so don't flush clean entry. */ #if H5C_COLLECT_CACHE_STATS - clean_entries_skipped++; + clean_entries_skipped++; #endif /* H5C_COLLECT_CACHE_STATS */ - didnt_flush_entry = TRUE; - } + didnt_flush_entry = TRUE; + } #if H5C_COLLECT_CACHE_STATS - total_entries_scanned++; + total_entries_scanned++; #endif /* H5C_COLLECT_CACHE_STATS */ - } - else { + } + else { - /* Skip epoch markers, entries that are in the process - * of being flushed, and entries marked as prefetched_dirty - * (occurs in the R/O case only). - */ - didnt_flush_entry = TRUE; + /* Skip epoch markers, entries that are in the process + * of being flushed, and entries marked as prefetched_dirty + * (occurs in the R/O case only). + */ + didnt_flush_entry = TRUE; #if H5C_COLLECT_CACHE_STATS - if (entry_ptr->prefetched_dirty) - dirty_pf_entries_skipped++; + if (entry_ptr->prefetched_dirty) + dirty_pf_entries_skipped++; #endif /* H5C_COLLECT_CACHE_STATS */ - } - - if (prev_ptr != NULL) { + } - if (didnt_flush_entry) { + if (prev_ptr != NULL) { - /* epoch markers don't get flushed, and we don't touch - * entries that are in the process of being flushed. - * Hence no need for sanity checks, as we haven't - * flushed anything. Thus just set entry_ptr to prev_ptr - * and go on. - */ - entry_ptr = prev_ptr; - } - else if ((restart_scan) || (prev_ptr->is_dirty != prev_is_dirty) || - (prev_ptr->next != next_ptr) || (prev_ptr->is_protected) || - (prev_ptr->is_pinned)) { + if (didnt_flush_entry) { - /* something has happened to the LRU -- start over - * from the tail. - */ - restart_scan = FALSE; - entry_ptr = cache_ptr->LRU_tail_ptr; - H5C__UPDATE_STATS_FOR_LRU_SCAN_RESTART(cache_ptr) - } - else { + /* epoch markers don't get flushed, and we don't touch + * entries that are in the process of being flushed. + * Hence no need for sanity checks, as we haven't + * flushed anything. Thus just set entry_ptr to prev_ptr + * and go on. + */ + entry_ptr = prev_ptr; + } + else if ((restart_scan) || (prev_ptr->is_dirty != prev_is_dirty) || + (prev_ptr->next != next_ptr) || (prev_ptr->is_protected) || (prev_ptr->is_pinned)) { - entry_ptr = prev_ptr; - } + /* something has happened to the LRU -- start over + * from the tail. + */ + restart_scan = FALSE; + entry_ptr = cache_ptr->LRU_tail_ptr; + H5C__UPDATE_STATS_FOR_LRU_SCAN_RESTART(cache_ptr) } else { - entry_ptr = NULL; + entry_ptr = prev_ptr; } + } + else { - entries_examined++; + entry_ptr = NULL; + } - if (cache_ptr->index_size >= cache_ptr->max_cache_size) { + entries_examined++; - empty_space = 0; - } - else { + if (cache_ptr->index_size >= cache_ptr->max_cache_size) { - empty_space = cache_ptr->max_cache_size - cache_ptr->index_size; - } + empty_space = 0; + } + else { - HDassert(cache_ptr->index_size == - (cache_ptr->clean_index_size + cache_ptr->dirty_index_size)); + empty_space = cache_ptr->max_cache_size - cache_ptr->index_size; } + HDassert(cache_ptr->index_size == (cache_ptr->clean_index_size + cache_ptr->dirty_index_size)); + } + #if H5C_COLLECT_CACHE_STATS - cache_ptr->calls_to_msic++; + cache_ptr->calls_to_msic++; - cache_ptr->total_entries_skipped_in_msic += clean_entries_skipped; - cache_ptr->total_dirty_pf_entries_skipped_in_msic += dirty_pf_entries_skipped; - cache_ptr->total_entries_scanned_in_msic += total_entries_scanned; + cache_ptr->total_entries_skipped_in_msic += clean_entries_skipped; + cache_ptr->total_dirty_pf_entries_skipped_in_msic += dirty_pf_entries_skipped; + cache_ptr->total_entries_scanned_in_msic += total_entries_scanned; - if (clean_entries_skipped > cache_ptr->max_entries_skipped_in_msic) { + if (clean_entries_skipped > cache_ptr->max_entries_skipped_in_msic) { - cache_ptr->max_entries_skipped_in_msic = clean_entries_skipped; - } + cache_ptr->max_entries_skipped_in_msic = clean_entries_skipped; + } - if (dirty_pf_entries_skipped > cache_ptr->max_dirty_pf_entries_skipped_in_msic) - cache_ptr->max_dirty_pf_entries_skipped_in_msic = dirty_pf_entries_skipped; + if (dirty_pf_entries_skipped > cache_ptr->max_dirty_pf_entries_skipped_in_msic) + cache_ptr->max_dirty_pf_entries_skipped_in_msic = dirty_pf_entries_skipped; - if (total_entries_scanned > cache_ptr->max_entries_scanned_in_msic) { + if (total_entries_scanned > cache_ptr->max_entries_scanned_in_msic) { - cache_ptr->max_entries_scanned_in_msic = total_entries_scanned; - } + cache_ptr->max_entries_scanned_in_msic = total_entries_scanned; + } #endif /* H5C_COLLECT_CACHE_STATS */ - /* NEED: work on a better assert for corked entries */ - HDassert((entries_examined > (2 * initial_list_len)) || - ((cache_ptr->pl_size + cache_ptr->pel_size + cache_ptr->min_clean_size) > - cache_ptr->max_cache_size) || - ((cache_ptr->clean_index_size + empty_space) >= cache_ptr->min_clean_size) || - ((num_corked_entries))); + /* NEED: work on a better assert for corked entries */ + HDassert((entries_examined > (2 * initial_list_len)) || + ((cache_ptr->pl_size + cache_ptr->pel_size + cache_ptr->min_clean_size) > + cache_ptr->max_cache_size) || + ((cache_ptr->clean_index_size + empty_space) >= cache_ptr->min_clean_size) || + ((num_corked_entries))); #if H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS - HDassert((entries_examined > (2 * initial_list_len)) || - (cache_ptr->cLRU_list_size <= cache_ptr->clean_index_size)); - HDassert((entries_examined > (2 * initial_list_len)) || - (cache_ptr->dLRU_list_size <= cache_ptr->dirty_index_size)); + HDassert((entries_examined > (2 * initial_list_len)) || + (cache_ptr->cLRU_list_size <= cache_ptr->clean_index_size)); + HDassert((entries_examined > (2 * initial_list_len)) || + (cache_ptr->dLRU_list_size <= cache_ptr->dirty_index_size)); #endif /* H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS */ - } - else { + } + else { - HDassert(H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS); + HDassert(H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS); #if H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS - initial_list_len = cache_ptr->cLRU_list_len; - entry_ptr = cache_ptr->cLRU_tail_ptr; + initial_list_len = cache_ptr->cLRU_list_len; + entry_ptr = cache_ptr->cLRU_tail_ptr; - while (((cache_ptr->index_size + space_needed) > cache_ptr->max_cache_size) && - (entries_examined <= initial_list_len) && (entry_ptr != NULL)) { - HDassert(!(entry_ptr->is_protected)); - HDassert(!(entry_ptr->is_read_only)); - HDassert((entry_ptr->ro_ref_count) == 0); - HDassert(!(entry_ptr->is_dirty)); + while (((cache_ptr->index_size + space_needed) > cache_ptr->max_cache_size) && + (entries_examined <= initial_list_len) && (entry_ptr != NULL)) { + HDassert(!(entry_ptr->is_protected)); + HDassert(!(entry_ptr->is_read_only)); + HDassert((entry_ptr->ro_ref_count) == 0); + HDassert(!(entry_ptr->is_dirty)); - prev_ptr = entry_ptr->aux_prev; + prev_ptr = entry_ptr->aux_prev; - if ((!(entry_ptr->prefetched_dirty)) + if ((!(entry_ptr->prefetched_dirty)) #ifdef H5_HAVE_PARALLEL - && (!(entry_ptr->coll_access)) + && (!(entry_ptr->coll_access)) #endif /* H5_HAVE_PARALLEL */ - ) { - if (H5C__flush_single_entry(f, entry_ptr, - H5C__FLUSH_INVALIDATE_FLAG | - H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush entry") + ) { + if (H5C__flush_single_entry( + f, entry_ptr, H5C__FLUSH_INVALIDATE_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush entry") - } /* end if */ + } /* end if */ - /* we are scanning the clean LRU, so the serialize function - * will not be called on any entry -- thus there is no - * concern about the list being modified out from under - * this function. - */ + /* we are scanning the clean LRU, so the serialize function + * will not be called on any entry -- thus there is no + * concern about the list being modified out from under + * this function. + */ - entry_ptr = prev_ptr; - entries_examined++; - } -#endif /* H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS */ + entry_ptr = prev_ptr; + entries_examined++; } +#endif /* H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS */ + } done: - /* Sanity checks */ - HDassert(cache_ptr->msic_in_progress); - if (!reentrant_call) - cache_ptr->msic_in_progress = FALSE; - HDassert((!reentrant_call) || (cache_ptr->msic_in_progress)); + /* Sanity checks */ + HDassert(cache_ptr->msic_in_progress); + if (!reentrant_call) + cache_ptr->msic_in_progress = FALSE; + HDassert((!reentrant_call) || (cache_ptr->msic_in_progress)); - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__make_space_in_cache() */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C__make_space_in_cache() */ /*------------------------------------------------------------------------- * @@ -7793,81 +7794,82 @@ done: */ #if H5C_DO_EXTREME_SANITY_CHECKS - static herr_t H5C_validate_lru_list(H5C_t * cache_ptr) - { - herr_t ret_value = SUCCEED; /* Return value */ - int32_t len = 0; - size_t size = 0; - H5C_cache_entry_t *entry_ptr = NULL; +static herr_t +H5C_validate_lru_list(H5C_t *cache_ptr) +{ + herr_t ret_value = SUCCEED; /* Return value */ + int32_t len = 0; + size_t size = 0; + H5C_cache_entry_t *entry_ptr = NULL; - FUNC_ENTER_NOAPI_NOINIT + FUNC_ENTER_NOAPI_NOINIT - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - if (((cache_ptr->LRU_head_ptr == NULL) || (cache_ptr->LRU_tail_ptr == NULL)) && - (cache_ptr->LRU_head_ptr != cache_ptr->LRU_tail_ptr)) { + if (((cache_ptr->LRU_head_ptr == NULL) || (cache_ptr->LRU_tail_ptr == NULL)) && + (cache_ptr->LRU_head_ptr != cache_ptr->LRU_tail_ptr)) { - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 1 failed") - } + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 1 failed") + } - if (cache_ptr->LRU_list_len < 0) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 2 failed") + if (cache_ptr->LRU_list_len < 0) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 2 failed") - if ((cache_ptr->LRU_list_len == 1) && - ((cache_ptr->LRU_head_ptr != cache_ptr->LRU_tail_ptr) || (cache_ptr->LRU_head_ptr == NULL) || - (cache_ptr->LRU_head_ptr->size != cache_ptr->LRU_list_size))) { + if ((cache_ptr->LRU_list_len == 1) && + ((cache_ptr->LRU_head_ptr != cache_ptr->LRU_tail_ptr) || (cache_ptr->LRU_head_ptr == NULL) || + (cache_ptr->LRU_head_ptr->size != cache_ptr->LRU_list_size))) { - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 3 failed") - } - - if ((cache_ptr->LRU_list_len >= 1) && - ((cache_ptr->LRU_head_ptr == NULL) || (cache_ptr->LRU_head_ptr->prev != NULL) || - (cache_ptr->LRU_tail_ptr == NULL) || (cache_ptr->LRU_tail_ptr->next != NULL))) { + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 3 failed") + } - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 4 failed") - } + if ((cache_ptr->LRU_list_len >= 1) && + ((cache_ptr->LRU_head_ptr == NULL) || (cache_ptr->LRU_head_ptr->prev != NULL) || + (cache_ptr->LRU_tail_ptr == NULL) || (cache_ptr->LRU_tail_ptr->next != NULL))) { - entry_ptr = cache_ptr->LRU_head_ptr; - while (entry_ptr != NULL) { + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 4 failed") + } - if ((entry_ptr != cache_ptr->LRU_head_ptr) && - ((entry_ptr->prev == NULL) || (entry_ptr->prev->next != entry_ptr))) { + entry_ptr = cache_ptr->LRU_head_ptr; + while (entry_ptr != NULL) { - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 5 failed") - } + if ((entry_ptr != cache_ptr->LRU_head_ptr) && + ((entry_ptr->prev == NULL) || (entry_ptr->prev->next != entry_ptr))) { - if ((entry_ptr != cache_ptr->LRU_tail_ptr) && - ((entry_ptr->next == NULL) || (entry_ptr->next->prev != entry_ptr))) { + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 5 failed") + } - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 6 failed") - } + if ((entry_ptr != cache_ptr->LRU_tail_ptr) && + ((entry_ptr->next == NULL) || (entry_ptr->next->prev != entry_ptr))) { - if ((entry_ptr->is_pinned) || (entry_ptr->pinned_from_client) || (entry_ptr->pinned_from_cache)) { + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 6 failed") + } - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 7 failed") - } + if ((entry_ptr->is_pinned) || (entry_ptr->pinned_from_client) || (entry_ptr->pinned_from_cache)) { - len++; - size += entry_ptr->size; - entry_ptr = entry_ptr->next; + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 7 failed") } - if ((cache_ptr->LRU_list_len != len) || (cache_ptr->LRU_list_size != size)) { + len++; + size += entry_ptr->size; + entry_ptr = entry_ptr->next; + } - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 8 failed") - } + if ((cache_ptr->LRU_list_len != len) || (cache_ptr->LRU_list_size != size)) { + + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 8 failed") + } done: - if (ret_value != SUCCEED) { + if (ret_value != SUCCEED) { - HDassert(0); - } + HDassert(0); + } - FUNC_LEAVE_NOAPI(ret_value) + FUNC_LEAVE_NOAPI(ret_value) - } /* H5C_validate_lru_list() */ +} /* H5C_validate_lru_list() */ #endif /* H5C_DO_EXTREME_SANITY_CHECKS */ @@ -7894,86 +7896,87 @@ done: */ #if H5C_DO_EXTREME_SANITY_CHECKS - static herr_t H5C_validate_pinned_entry_list(H5C_t * cache_ptr) - { - herr_t ret_value = SUCCEED; /* Return value */ - int32_t len = 0; - size_t size = 0; - H5C_cache_entry_t *entry_ptr = NULL; - - FUNC_ENTER_NOAPI_NOINIT +static herr_t +H5C_validate_pinned_entry_list(H5C_t *cache_ptr) +{ + herr_t ret_value = SUCCEED; /* Return value */ + int32_t len = 0; + size_t size = 0; + H5C_cache_entry_t *entry_ptr = NULL; - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + FUNC_ENTER_NOAPI_NOINIT - if (((cache_ptr->pel_head_ptr == NULL) || (cache_ptr->pel_tail_ptr == NULL)) && - (cache_ptr->pel_head_ptr != cache_ptr->pel_tail_ptr)) { + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 1 failed") - } + if (((cache_ptr->pel_head_ptr == NULL) || (cache_ptr->pel_tail_ptr == NULL)) && + (cache_ptr->pel_head_ptr != cache_ptr->pel_tail_ptr)) { - if (cache_ptr->pel_len < 0) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 2 failed") + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 1 failed") + } - if ((cache_ptr->pel_len == 1) && - ((cache_ptr->pel_head_ptr != cache_ptr->pel_tail_ptr) || (cache_ptr->pel_head_ptr == NULL) || - (cache_ptr->pel_head_ptr->size != cache_ptr->pel_size))) { + if (cache_ptr->pel_len < 0) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 2 failed") - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 3 failed") - } + if ((cache_ptr->pel_len == 1) && + ((cache_ptr->pel_head_ptr != cache_ptr->pel_tail_ptr) || (cache_ptr->pel_head_ptr == NULL) || + (cache_ptr->pel_head_ptr->size != cache_ptr->pel_size))) { - if ((cache_ptr->pel_len >= 1) && - ((cache_ptr->pel_head_ptr == NULL) || (cache_ptr->pel_head_ptr->prev != NULL) || - (cache_ptr->pel_tail_ptr == NULL) || (cache_ptr->pel_tail_ptr->next != NULL))) { + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 3 failed") + } - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 4 failed") - } + if ((cache_ptr->pel_len >= 1) && + ((cache_ptr->pel_head_ptr == NULL) || (cache_ptr->pel_head_ptr->prev != NULL) || + (cache_ptr->pel_tail_ptr == NULL) || (cache_ptr->pel_tail_ptr->next != NULL))) { - entry_ptr = cache_ptr->pel_head_ptr; - while (entry_ptr != NULL) { + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 4 failed") + } - if ((entry_ptr != cache_ptr->pel_head_ptr) && - ((entry_ptr->prev == NULL) || (entry_ptr->prev->next != entry_ptr))) { + entry_ptr = cache_ptr->pel_head_ptr; + while (entry_ptr != NULL) { - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 5 failed") - } + if ((entry_ptr != cache_ptr->pel_head_ptr) && + ((entry_ptr->prev == NULL) || (entry_ptr->prev->next != entry_ptr))) { - if ((entry_ptr != cache_ptr->pel_tail_ptr) && - ((entry_ptr->next == NULL) || (entry_ptr->next->prev != entry_ptr))) { + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 5 failed") + } - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 6 failed") - } + if ((entry_ptr != cache_ptr->pel_tail_ptr) && + ((entry_ptr->next == NULL) || (entry_ptr->next->prev != entry_ptr))) { - if (!entry_ptr->is_pinned) { + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 6 failed") + } - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 7 failed") - } + if (!entry_ptr->is_pinned) { - if (!((entry_ptr->pinned_from_client) || (entry_ptr->pinned_from_cache))) { + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 7 failed") + } - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 8 failed") - } + if (!((entry_ptr->pinned_from_client) || (entry_ptr->pinned_from_cache))) { - len++; - size += entry_ptr->size; - entry_ptr = entry_ptr->next; + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 8 failed") } - if ((cache_ptr->pel_len != len) || (cache_ptr->pel_size != size)) { + len++; + size += entry_ptr->size; + entry_ptr = entry_ptr->next; + } - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 9 failed") - } + if ((cache_ptr->pel_len != len) || (cache_ptr->pel_size != size)) { + + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 9 failed") + } done: - if (ret_value != SUCCEED) { + if (ret_value != SUCCEED) { - HDassert(0); - } + HDassert(0); + } - FUNC_LEAVE_NOAPI(ret_value) + FUNC_LEAVE_NOAPI(ret_value) - } /* H5C_validate_pinned_entry_list() */ +} /* H5C_validate_pinned_entry_list() */ #endif /* H5C_DO_EXTREME_SANITY_CHECKS */ @@ -8000,84 +8003,85 @@ done: */ #if H5C_DO_EXTREME_SANITY_CHECKS - static herr_t H5C_validate_protected_entry_list(H5C_t * cache_ptr) - { - herr_t ret_value = SUCCEED; /* Return value */ - int32_t len = 0; - size_t size = 0; - H5C_cache_entry_t *entry_ptr = NULL; - - FUNC_ENTER_NOAPI_NOINIT +static herr_t +H5C_validate_protected_entry_list(H5C_t *cache_ptr) +{ + herr_t ret_value = SUCCEED; /* Return value */ + int32_t len = 0; + size_t size = 0; + H5C_cache_entry_t *entry_ptr = NULL; - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + FUNC_ENTER_NOAPI_NOINIT - if (((cache_ptr->pl_head_ptr == NULL) || (cache_ptr->pl_tail_ptr == NULL)) && - (cache_ptr->pl_head_ptr != cache_ptr->pl_tail_ptr)) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 1 failed") + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - if (cache_ptr->pl_len < 0) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 2 failed") + if (((cache_ptr->pl_head_ptr == NULL) || (cache_ptr->pl_tail_ptr == NULL)) && + (cache_ptr->pl_head_ptr != cache_ptr->pl_tail_ptr)) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 1 failed") - if ((cache_ptr->pl_len == 1) && - ((cache_ptr->pl_head_ptr != cache_ptr->pl_tail_ptr) || (cache_ptr->pl_head_ptr == NULL) || - (cache_ptr->pl_head_ptr->size != cache_ptr->pl_size))) { + if (cache_ptr->pl_len < 0) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 2 failed") - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 3 failed") - } + if ((cache_ptr->pl_len == 1) && + ((cache_ptr->pl_head_ptr != cache_ptr->pl_tail_ptr) || (cache_ptr->pl_head_ptr == NULL) || + (cache_ptr->pl_head_ptr->size != cache_ptr->pl_size))) { - if ((cache_ptr->pl_len >= 1) && - ((cache_ptr->pl_head_ptr == NULL) || (cache_ptr->pl_head_ptr->prev != NULL) || - (cache_ptr->pl_tail_ptr == NULL) || (cache_ptr->pl_tail_ptr->next != NULL))) { + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 3 failed") + } - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 4 failed") - } + if ((cache_ptr->pl_len >= 1) && + ((cache_ptr->pl_head_ptr == NULL) || (cache_ptr->pl_head_ptr->prev != NULL) || + (cache_ptr->pl_tail_ptr == NULL) || (cache_ptr->pl_tail_ptr->next != NULL))) { - entry_ptr = cache_ptr->pl_head_ptr; - while (entry_ptr != NULL) { + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 4 failed") + } - if ((entry_ptr != cache_ptr->pl_head_ptr) && - ((entry_ptr->prev == NULL) || (entry_ptr->prev->next != entry_ptr))) { + entry_ptr = cache_ptr->pl_head_ptr; + while (entry_ptr != NULL) { - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 5 failed") - } + if ((entry_ptr != cache_ptr->pl_head_ptr) && + ((entry_ptr->prev == NULL) || (entry_ptr->prev->next != entry_ptr))) { - if ((entry_ptr != cache_ptr->pl_tail_ptr) && - ((entry_ptr->next == NULL) || (entry_ptr->next->prev != entry_ptr))) { + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 5 failed") + } - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 6 failed") - } + if ((entry_ptr != cache_ptr->pl_tail_ptr) && + ((entry_ptr->next == NULL) || (entry_ptr->next->prev != entry_ptr))) { - if (!entry_ptr->is_protected) { + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 6 failed") + } - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 7 failed") - } + if (!entry_ptr->is_protected) { - if ((entry_ptr->is_read_only) && (entry_ptr->ro_ref_count <= 0)) { + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 7 failed") + } - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 8 failed") - } + if ((entry_ptr->is_read_only) && (entry_ptr->ro_ref_count <= 0)) { - len++; - size += entry_ptr->size; - entry_ptr = entry_ptr->next; + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 8 failed") } - if ((cache_ptr->pl_len != len) || (cache_ptr->pl_size != size)) { + len++; + size += entry_ptr->size; + entry_ptr = entry_ptr->next; + } - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 9 failed") - } + if ((cache_ptr->pl_len != len) || (cache_ptr->pl_size != size)) { + + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Check 9 failed") + } done: - if (ret_value != SUCCEED) { + if (ret_value != SUCCEED) { - HDassert(0); - } + HDassert(0); + } - FUNC_LEAVE_NOAPI(ret_value) + FUNC_LEAVE_NOAPI(ret_value) - } /* H5C_validate_protected_entry_list() */ +} /* H5C_validate_protected_entry_list() */ #endif /* H5C_DO_EXTREME_SANITY_CHECKS */ @@ -8102,1271 +8106,1281 @@ done: */ #if H5C_DO_SLIST_SANITY_CHECKS - static hbool_t H5C_entry_in_skip_list(H5C_t * cache_ptr, H5C_cache_entry_t * target_ptr) - { - hbool_t in_slist = FALSE; - H5SL_node_t *node_ptr = NULL; - H5C_cache_entry_t *entry_ptr = NULL; +static hbool_t +H5C_entry_in_skip_list(H5C_t *cache_ptr, H5C_cache_entry_t *target_ptr) +{ + hbool_t in_slist = FALSE; + H5SL_node_t *node_ptr = NULL; + H5C_cache_entry_t *entry_ptr = NULL; - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - HDassert(cache_ptr->slist_ptr); + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(cache_ptr->slist_ptr); - node_ptr = H5SL_first(cache_ptr->slist_ptr); + node_ptr = H5SL_first(cache_ptr->slist_ptr); - while ((node_ptr != NULL) && (!in_slist)) { - entry_ptr = (H5C_cache_entry_t *)H5SL_item(node_ptr); + while ((node_ptr != NULL) && (!in_slist)) { + entry_ptr = (H5C_cache_entry_t *)H5SL_item(node_ptr); - HDassert(entry_ptr); - HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(entry_ptr->is_dirty); - HDassert(entry_ptr->in_slist); + HDassert(entry_ptr); + HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(entry_ptr->is_dirty); + HDassert(entry_ptr->in_slist); - if (entry_ptr == target_ptr) { + if (entry_ptr == target_ptr) { - in_slist = TRUE; - } - else { + in_slist = TRUE; + } + else { - node_ptr = H5SL_next(node_ptr); - } + node_ptr = H5SL_next(node_ptr); } + } - return (in_slist); + return (in_slist); - } /* H5C_entry_in_skip_list() */ +} /* H5C_entry_in_skip_list() */ #endif /* H5C_DO_SLIST_SANITY_CHECKS */ - /*------------------------------------------------------------------------- - * - * Function: H5C__flush_marked_entries - * - * Purpose: Flushes all marked entries in the cache. - * - * Return: FAIL if error is detected, SUCCEED otherwise. - * - * Programmer: Mike McGreevy - * November 3, 2010 - * - * Changes: Modified function to setup the slist before calling - * H%C_flush_cache(), and take it down afterwards. Note - * that the slist need not be empty after the call to - * H5C_flush_cache() since we are only flushing marked - * entries. Thus must set the clear_slist parameter - * of H5C_set_slist_enabled to TRUE. - * - * JRM -- 5/6/20 - * - *------------------------------------------------------------------------- - */ +/*------------------------------------------------------------------------- + * + * Function: H5C__flush_marked_entries + * + * Purpose: Flushes all marked entries in the cache. + * + * Return: FAIL if error is detected, SUCCEED otherwise. + * + * Programmer: Mike McGreevy + * November 3, 2010 + * + * Changes: Modified function to setup the slist before calling + * H%C_flush_cache(), and take it down afterwards. Note + * that the slist need not be empty after the call to + * H5C_flush_cache() since we are only flushing marked + * entries. Thus must set the clear_slist parameter + * of H5C_set_slist_enabled to TRUE. + * + * JRM -- 5/6/20 + * + *------------------------------------------------------------------------- + */ - herr_t H5C__flush_marked_entries(H5F_t * f) - { - herr_t ret_value = SUCCEED; +herr_t +H5C__flush_marked_entries(H5F_t *f) +{ + herr_t ret_value = SUCCEED; - FUNC_ENTER_PACKAGE + FUNC_ENTER_PACKAGE - /* Assertions */ - HDassert(f != NULL); + /* Assertions */ + HDassert(f != NULL); - /* Enable the slist, as it is needed in the flush */ - if (H5C_set_slist_enabled(f->shared->cache, TRUE, FALSE) < 0) + /* Enable the slist, as it is needed in the flush */ + if (H5C_set_slist_enabled(f->shared->cache, TRUE, FALSE) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "set slist enabled failed") + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "set slist enabled failed") - /* Flush all marked entries */ - if (H5C_flush_cache(f, H5C__FLUSH_MARKED_ENTRIES_FLAG | H5C__FLUSH_IGNORE_PROTECTED_FLAG) < 0) + /* Flush all marked entries */ + if (H5C_flush_cache(f, H5C__FLUSH_MARKED_ENTRIES_FLAG | H5C__FLUSH_IGNORE_PROTECTED_FLAG) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't flush cache") + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't flush cache") - /* Disable the slist. Set the clear_slist parameter to TRUE - * since we called H5C_flush_cache() with the - * H5C__FLUSH_MARKED_ENTRIES_FLAG. - */ - if (H5C_set_slist_enabled(f->shared->cache, FALSE, TRUE) < 0) + /* Disable the slist. Set the clear_slist parameter to TRUE + * since we called H5C_flush_cache() with the + * H5C__FLUSH_MARKED_ENTRIES_FLAG. + */ + if (H5C_set_slist_enabled(f->shared->cache, FALSE, TRUE) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "disable slist failed") + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "disable slist failed") done: - FUNC_LEAVE_NOAPI(ret_value) - - } /* H5C__flush_marked_entries */ - - /*------------------------------------------------------------------------- - * - * Function: H5C_cork - * - * Purpose: To cork/uncork/get cork status of an object depending on "action": - * H5C__SET_CORK: - * To cork the object - * Return error if the object is already corked - * H5C__UNCORK: - * To uncork the object - * Return error if the object is not corked - * H5C__GET_CORKED: - * To retrieve the cork status of an object in - * the parameter "corked" - * - * Return: Success: Non-negative - * Failure: Negative - * - * Programmer: Vailin Choi - * January 2014 - * - *------------------------------------------------------------------------- - */ - herr_t H5C_cork(H5C_t * cache_ptr, haddr_t obj_addr, unsigned action, hbool_t *corked) - { - H5C_tag_info_t *tag_info; /* Points to a tag info struct */ - herr_t ret_value = SUCCEED; + FUNC_LEAVE_NOAPI(ret_value) - FUNC_ENTER_NOAPI_NOINIT +} /* H5C__flush_marked_entries */ - /* Assertions */ - HDassert(cache_ptr != NULL); - HDassert(H5F_addr_defined(obj_addr)); - HDassert(action == H5C__SET_CORK || action == H5C__UNCORK || action == H5C__GET_CORKED); +/*------------------------------------------------------------------------- + * + * Function: H5C_cork + * + * Purpose: To cork/uncork/get cork status of an object depending on "action": + * H5C__SET_CORK: + * To cork the object + * Return error if the object is already corked + * H5C__UNCORK: + * To uncork the object + * Return error if the object is not corked + * H5C__GET_CORKED: + * To retrieve the cork status of an object in + * the parameter "corked" + * + * Return: Success: Non-negative + * Failure: Negative + * + * Programmer: Vailin Choi + * January 2014 + * + *------------------------------------------------------------------------- + */ +herr_t +H5C_cork(H5C_t *cache_ptr, haddr_t obj_addr, unsigned action, hbool_t *corked) +{ + H5C_tag_info_t *tag_info; /* Points to a tag info struct */ + herr_t ret_value = SUCCEED; - /* Search the list of corked object addresses in the cache */ - tag_info = (H5C_tag_info_t *)H5SL_search(cache_ptr->tag_list, &obj_addr); + FUNC_ENTER_NOAPI_NOINIT - if (H5C__GET_CORKED == action) { - HDassert(corked); - if (tag_info != NULL && tag_info->corked) - *corked = TRUE; - else - *corked = FALSE; - } /* end if */ - else { - /* Sanity check */ - HDassert(H5C__SET_CORK == action || H5C__UNCORK == action); - - /* Perform appropriate action */ - if (H5C__SET_CORK == action) { - /* Check if this is the first entry for this tagged object */ - if (NULL == tag_info) { - /* Allocate new tag info struct */ - if (NULL == (tag_info = H5FL_CALLOC(H5C_tag_info_t))) - HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, "can't allocate tag info for cache entry") - - /* Set the tag for all entries */ - tag_info->tag = obj_addr; - - /* Insert tag info into skip list */ - if (H5SL_insert(cache_ptr->tag_list, tag_info, &(tag_info->tag)) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTINSERT, FAIL, "can't insert tag info in skip list") - } /* end if */ - else { - /* Check for object already corked */ - if (tag_info->corked) - HGOTO_ERROR(H5E_CACHE, H5E_CANTCORK, FAIL, "object already corked") - HDassert(tag_info->entry_cnt > 0 && tag_info->head); - } /* end else */ + /* Assertions */ + HDassert(cache_ptr != NULL); + HDassert(H5F_addr_defined(obj_addr)); + HDassert(action == H5C__SET_CORK || action == H5C__UNCORK || action == H5C__GET_CORKED); - /* Set the corked status for the entire object */ - tag_info->corked = TRUE; - cache_ptr->num_objs_corked++; + /* Search the list of corked object addresses in the cache */ + tag_info = (H5C_tag_info_t *)H5SL_search(cache_ptr->tag_list, &obj_addr); + if (H5C__GET_CORKED == action) { + HDassert(corked); + if (tag_info != NULL && tag_info->corked) + *corked = TRUE; + else + *corked = FALSE; + } /* end if */ + else { + /* Sanity check */ + HDassert(H5C__SET_CORK == action || H5C__UNCORK == action); + + /* Perform appropriate action */ + if (H5C__SET_CORK == action) { + /* Check if this is the first entry for this tagged object */ + if (NULL == tag_info) { + /* Allocate new tag info struct */ + if (NULL == (tag_info = H5FL_CALLOC(H5C_tag_info_t))) + HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, "can't allocate tag info for cache entry") + + /* Set the tag for all entries */ + tag_info->tag = obj_addr; + + /* Insert tag info into skip list */ + if (H5SL_insert(cache_ptr->tag_list, tag_info, &(tag_info->tag)) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTINSERT, FAIL, "can't insert tag info in skip list") } /* end if */ else { - /* Sanity check */ - HDassert(tag_info); + /* Check for object already corked */ + if (tag_info->corked) + HGOTO_ERROR(H5E_CACHE, H5E_CANTCORK, FAIL, "object already corked") + HDassert(tag_info->entry_cnt > 0 && tag_info->head); + } /* end else */ - /* Check for already uncorked */ - if (!tag_info->corked) - HGOTO_ERROR(H5E_CACHE, H5E_CANTUNCORK, FAIL, "object already uncorked") + /* Set the corked status for the entire object */ + tag_info->corked = TRUE; + cache_ptr->num_objs_corked++; - /* Set the corked status for the entire object */ - tag_info->corked = FALSE; - cache_ptr->num_objs_corked--; + } /* end if */ + else { + /* Sanity check */ + HDassert(tag_info); - /* Remove the tag info from the tag list, if there's no more entries with this tag */ - if (0 == tag_info->entry_cnt) { - /* Sanity check */ - HDassert(NULL == tag_info->head); + /* Check for already uncorked */ + if (!tag_info->corked) + HGOTO_ERROR(H5E_CACHE, H5E_CANTUNCORK, FAIL, "object already uncorked") - if (H5SL_remove(cache_ptr->tag_list, &(tag_info->tag)) != tag_info) - HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, "can't remove tag info from list") + /* Set the corked status for the entire object */ + tag_info->corked = FALSE; + cache_ptr->num_objs_corked--; - /* Release the tag info */ - tag_info = H5FL_FREE(H5C_tag_info_t, tag_info); - } /* end if */ - else - HDassert(NULL != tag_info->head); - } /* end else */ - } /* end else */ + /* Remove the tag info from the tag list, if there's no more entries with this tag */ + if (0 == tag_info->entry_cnt) { + /* Sanity check */ + HDassert(NULL == tag_info->head); -done: - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C_cork() */ + if (H5SL_remove(cache_ptr->tag_list, &(tag_info->tag)) != tag_info) + HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, "can't remove tag info from list") - /*------------------------------------------------------------------------- - * Function: H5C__mark_flush_dep_dirty() - * - * Purpose: Recursively propagate the flush_dep_ndirty_children flag - * up the dependency chain in response to entry either - * becoming dirty or having its flush_dep_ndirty_children - * increased from 0. - * - * Return: Non-negative on success/Negative on failure - * - * Programmer: Neil Fortner - * 11/13/12 - * - *------------------------------------------------------------------------- - */ - static herr_t H5C__mark_flush_dep_dirty(H5C_cache_entry_t * entry) - { - unsigned u; /* Local index variable */ - herr_t ret_value = SUCCEED; /* Return value */ + /* Release the tag info */ + tag_info = H5FL_FREE(H5C_tag_info_t, tag_info); + } /* end if */ + else + HDassert(NULL != tag_info->head); + } /* end else */ + } /* end else */ - FUNC_ENTER_STATIC +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C_cork() */ - /* Sanity checks */ - HDassert(entry); +/*------------------------------------------------------------------------- + * Function: H5C__mark_flush_dep_dirty() + * + * Purpose: Recursively propagate the flush_dep_ndirty_children flag + * up the dependency chain in response to entry either + * becoming dirty or having its flush_dep_ndirty_children + * increased from 0. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Neil Fortner + * 11/13/12 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C__mark_flush_dep_dirty(H5C_cache_entry_t *entry) +{ + unsigned u; /* Local index variable */ + herr_t ret_value = SUCCEED; /* Return value */ - /* Iterate over the parent entries, if any */ - for (u = 0; u < entry->flush_dep_nparents; u++) { - /* Sanity check */ - HDassert(entry->flush_dep_parent[u]->flush_dep_ndirty_children < - entry->flush_dep_parent[u]->flush_dep_nchildren); + FUNC_ENTER_STATIC - /* Adjust the parent's number of dirty children */ - entry->flush_dep_parent[u]->flush_dep_ndirty_children++; + /* Sanity checks */ + HDassert(entry); - /* If the parent has a 'notify' callback, send a 'child entry dirtied' notice */ - if (entry->flush_dep_parent[u]->type->notify && - (entry->flush_dep_parent[u]->type->notify)(H5C_NOTIFY_ACTION_CHILD_DIRTIED, - entry->flush_dep_parent[u]) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, - "can't notify parent about child entry dirty flag set") - } /* end for */ + /* Iterate over the parent entries, if any */ + for (u = 0; u < entry->flush_dep_nparents; u++) { + /* Sanity check */ + HDassert(entry->flush_dep_parent[u]->flush_dep_ndirty_children < + entry->flush_dep_parent[u]->flush_dep_nchildren); + + /* Adjust the parent's number of dirty children */ + entry->flush_dep_parent[u]->flush_dep_ndirty_children++; + + /* If the parent has a 'notify' callback, send a 'child entry dirtied' notice */ + if (entry->flush_dep_parent[u]->type->notify && + (entry->flush_dep_parent[u]->type->notify)(H5C_NOTIFY_ACTION_CHILD_DIRTIED, + entry->flush_dep_parent[u]) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, + "can't notify parent about child entry dirty flag set") + } /* end for */ done: - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__mark_flush_dep_dirty() */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C__mark_flush_dep_dirty() */ - /*------------------------------------------------------------------------- - * Function: H5C__mark_flush_dep_clean() - * - * Purpose: Recursively propagate the flush_dep_ndirty_children flag - * up the dependency chain in response to entry either - * becoming clean or having its flush_dep_ndirty_children - * reduced to 0. - * - * Return: Non-negative on success/Negative on failure - * - * Programmer: Neil Fortner - * 11/13/12 - * - *------------------------------------------------------------------------- - */ - static herr_t H5C__mark_flush_dep_clean(H5C_cache_entry_t * entry) - { - int i; /* Local index variable */ - herr_t ret_value = SUCCEED; /* Return value */ +/*------------------------------------------------------------------------- + * Function: H5C__mark_flush_dep_clean() + * + * Purpose: Recursively propagate the flush_dep_ndirty_children flag + * up the dependency chain in response to entry either + * becoming clean or having its flush_dep_ndirty_children + * reduced to 0. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Neil Fortner + * 11/13/12 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C__mark_flush_dep_clean(H5C_cache_entry_t *entry) +{ + int i; /* Local index variable */ + herr_t ret_value = SUCCEED; /* Return value */ - FUNC_ENTER_STATIC + FUNC_ENTER_STATIC - /* Sanity checks */ - HDassert(entry); + /* Sanity checks */ + HDassert(entry); - /* Iterate over the parent entries, if any */ - /* Note reverse iteration order, in case the callback removes the flush - * dependency - QAK, 2017/08/12 - */ - for (i = ((int)entry->flush_dep_nparents) - 1; i >= 0; i--) { - /* Sanity check */ - HDassert(entry->flush_dep_parent[i]->flush_dep_ndirty_children > 0); + /* Iterate over the parent entries, if any */ + /* Note reverse iteration order, in case the callback removes the flush + * dependency - QAK, 2017/08/12 + */ + for (i = ((int)entry->flush_dep_nparents) - 1; i >= 0; i--) { + /* Sanity check */ + HDassert(entry->flush_dep_parent[i]->flush_dep_ndirty_children > 0); - /* Adjust the parent's number of dirty children */ - entry->flush_dep_parent[i]->flush_dep_ndirty_children--; + /* Adjust the parent's number of dirty children */ + entry->flush_dep_parent[i]->flush_dep_ndirty_children--; - /* If the parent has a 'notify' callback, send a 'child entry cleaned' notice */ - if (entry->flush_dep_parent[i]->type->notify && - (entry->flush_dep_parent[i]->type->notify)(H5C_NOTIFY_ACTION_CHILD_CLEANED, - entry->flush_dep_parent[i]) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, - "can't notify parent about child entry dirty flag reset") - } /* end for */ + /* If the parent has a 'notify' callback, send a 'child entry cleaned' notice */ + if (entry->flush_dep_parent[i]->type->notify && + (entry->flush_dep_parent[i]->type->notify)(H5C_NOTIFY_ACTION_CHILD_CLEANED, + entry->flush_dep_parent[i]) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, + "can't notify parent about child entry dirty flag reset") + } /* end for */ done: - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__mark_flush_dep_clean() */ - - /*------------------------------------------------------------------------- - * Function: H5C__mark_flush_dep_serialized() - * - * Purpose: Decrement the flush_dep_nunser_children fields of all the - * target entry's flush dependency parents in response to - * the target entry becoming serialized. - * - * Return: Non-negative on success/Negative on failure - * - * Programmer: John Mainzer - * 8/30/16 - * - *------------------------------------------------------------------------- - */ - herr_t H5C__mark_flush_dep_serialized(H5C_cache_entry_t * entry_ptr) - { - int i; /* Local index variable */ - herr_t ret_value = SUCCEED; /* Return value */ - - FUNC_ENTER_STATIC + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C__mark_flush_dep_clean() */ - /* Sanity checks */ - HDassert(entry_ptr); +/*------------------------------------------------------------------------- + * Function: H5C__mark_flush_dep_serialized() + * + * Purpose: Decrement the flush_dep_nunser_children fields of all the + * target entry's flush dependency parents in response to + * the target entry becoming serialized. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: John Mainzer + * 8/30/16 + * + *------------------------------------------------------------------------- + */ +herr_t +H5C__mark_flush_dep_serialized(H5C_cache_entry_t *entry_ptr) +{ + int i; /* Local index variable */ + herr_t ret_value = SUCCEED; /* Return value */ - /* Iterate over the parent entries, if any */ - /* Note reverse iteration order, in case the callback removes the flush - * dependency - QAK, 2017/08/12 - */ - for (i = ((int)entry_ptr->flush_dep_nparents) - 1; i >= 0; i--) { - /* Sanity checks */ - HDassert(entry_ptr->flush_dep_parent); - HDassert(entry_ptr->flush_dep_parent[i]->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(entry_ptr->flush_dep_parent[i]->flush_dep_nunser_children > 0); + FUNC_ENTER_STATIC - /* decrement the parents number of unserialized children */ - entry_ptr->flush_dep_parent[i]->flush_dep_nunser_children--; + /* Sanity checks */ + HDassert(entry_ptr); - /* If the parent has a 'notify' callback, send a 'child entry serialized' notice */ - if (entry_ptr->flush_dep_parent[i]->type->notify && - (entry_ptr->flush_dep_parent[i]->type->notify)(H5C_NOTIFY_ACTION_CHILD_SERIALIZED, - entry_ptr->flush_dep_parent[i]) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, - "can't notify parent about child entry serialized flag set") - } /* end for */ + /* Iterate over the parent entries, if any */ + /* Note reverse iteration order, in case the callback removes the flush + * dependency - QAK, 2017/08/12 + */ + for (i = ((int)entry_ptr->flush_dep_nparents) - 1; i >= 0; i--) { + /* Sanity checks */ + HDassert(entry_ptr->flush_dep_parent); + HDassert(entry_ptr->flush_dep_parent[i]->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(entry_ptr->flush_dep_parent[i]->flush_dep_nunser_children > 0); + + /* decrement the parents number of unserialized children */ + entry_ptr->flush_dep_parent[i]->flush_dep_nunser_children--; + + /* If the parent has a 'notify' callback, send a 'child entry serialized' notice */ + if (entry_ptr->flush_dep_parent[i]->type->notify && + (entry_ptr->flush_dep_parent[i]->type->notify)(H5C_NOTIFY_ACTION_CHILD_SERIALIZED, + entry_ptr->flush_dep_parent[i]) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, + "can't notify parent about child entry serialized flag set") + } /* end for */ done: - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__mark_flush_dep_serialized() */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C__mark_flush_dep_serialized() */ - /*------------------------------------------------------------------------- - * Function: H5C__mark_flush_dep_unserialized() - * - * Purpose: Increment the flush_dep_nunser_children fields of all the - * target entry's flush dependency parents in response to - * the target entry becoming unserialized. - * - * Return: Non-negative on success/Negative on failure - * - * Programmer: John Mainzer - * 8/30/16 - * - *------------------------------------------------------------------------- - */ - herr_t H5C__mark_flush_dep_unserialized(H5C_cache_entry_t * entry_ptr) - { - unsigned u; /* Local index variable */ - herr_t ret_value = SUCCEED; /* Return value */ +/*------------------------------------------------------------------------- + * Function: H5C__mark_flush_dep_unserialized() + * + * Purpose: Increment the flush_dep_nunser_children fields of all the + * target entry's flush dependency parents in response to + * the target entry becoming unserialized. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: John Mainzer + * 8/30/16 + * + *------------------------------------------------------------------------- + */ +herr_t +H5C__mark_flush_dep_unserialized(H5C_cache_entry_t *entry_ptr) +{ + unsigned u; /* Local index variable */ + herr_t ret_value = SUCCEED; /* Return value */ - FUNC_ENTER_STATIC + FUNC_ENTER_STATIC - /* Sanity checks */ - HDassert(entry_ptr); + /* Sanity checks */ + HDassert(entry_ptr); - /* Iterate over the parent entries, if any */ - for (u = 0; u < entry_ptr->flush_dep_nparents; u++) { - /* Sanity check */ - HDassert(entry_ptr->flush_dep_parent); - HDassert(entry_ptr->flush_dep_parent[u]->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(entry_ptr->flush_dep_parent[u]->flush_dep_nunser_children < - entry_ptr->flush_dep_parent[u]->flush_dep_nchildren); - - /* increment parents number of usserialized children */ - entry_ptr->flush_dep_parent[u]->flush_dep_nunser_children++; - - /* If the parent has a 'notify' callback, send a 'child entry unserialized' notice */ - if (entry_ptr->flush_dep_parent[u]->type->notify && - (entry_ptr->flush_dep_parent[u]->type->notify)(H5C_NOTIFY_ACTION_CHILD_UNSERIALIZED, - entry_ptr->flush_dep_parent[u]) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, - "can't notify parent about child entry serialized flag reset") - } /* end for */ + /* Iterate over the parent entries, if any */ + for (u = 0; u < entry_ptr->flush_dep_nparents; u++) { + /* Sanity check */ + HDassert(entry_ptr->flush_dep_parent); + HDassert(entry_ptr->flush_dep_parent[u]->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(entry_ptr->flush_dep_parent[u]->flush_dep_nunser_children < + entry_ptr->flush_dep_parent[u]->flush_dep_nchildren); + + /* increment parents number of usserialized children */ + entry_ptr->flush_dep_parent[u]->flush_dep_nunser_children++; + + /* If the parent has a 'notify' callback, send a 'child entry unserialized' notice */ + if (entry_ptr->flush_dep_parent[u]->type->notify && + (entry_ptr->flush_dep_parent[u]->type->notify)(H5C_NOTIFY_ACTION_CHILD_UNSERIALIZED, + entry_ptr->flush_dep_parent[u]) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, + "can't notify parent about child entry serialized flag reset") + } /* end for */ done: - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__mark_flush_dep_unserialized() */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C__mark_flush_dep_unserialized() */ #ifndef NDEBUG - /*------------------------------------------------------------------------- - * Function: H5C__assert_flush_dep_nocycle() - * - * Purpose: Assert recursively that base_entry is not the same as - * entry, and perform the same assertion on all of entry's - * flush dependency parents. This is used to detect cycles - * created by flush dependencies. - * - * Return: void - * - * Programmer: Neil Fortner - * 12/10/12 - * - *------------------------------------------------------------------------- - */ - static void H5C__assert_flush_dep_nocycle(const H5C_cache_entry_t *entry, - const H5C_cache_entry_t *base_entry) - { - unsigned u; /* Local index variable */ +/*------------------------------------------------------------------------- + * Function: H5C__assert_flush_dep_nocycle() + * + * Purpose: Assert recursively that base_entry is not the same as + * entry, and perform the same assertion on all of entry's + * flush dependency parents. This is used to detect cycles + * created by flush dependencies. + * + * Return: void + * + * Programmer: Neil Fortner + * 12/10/12 + * + *------------------------------------------------------------------------- + */ +static void +H5C__assert_flush_dep_nocycle(const H5C_cache_entry_t *entry, const H5C_cache_entry_t *base_entry) +{ + unsigned u; /* Local index variable */ - FUNC_ENTER_STATIC_NOERR + FUNC_ENTER_STATIC_NOERR - /* Sanity checks */ - HDassert(entry); - HDassert(base_entry); + /* Sanity checks */ + HDassert(entry); + HDassert(base_entry); - /* Make sure the entries are not the same */ - HDassert(base_entry != entry); + /* Make sure the entries are not the same */ + HDassert(base_entry != entry); - /* Iterate over entry's parents (if any) */ - for (u = 0; u < entry->flush_dep_nparents; u++) - H5C__assert_flush_dep_nocycle(entry->flush_dep_parent[u], base_entry); + /* Iterate over entry's parents (if any) */ + for (u = 0; u < entry->flush_dep_nparents; u++) + H5C__assert_flush_dep_nocycle(entry->flush_dep_parent[u], base_entry); - FUNC_LEAVE_NOAPI_VOID - } /* H5C__assert_flush_dep_nocycle() */ + FUNC_LEAVE_NOAPI_VOID +} /* H5C__assert_flush_dep_nocycle() */ #endif /* NDEBUG */ - /*------------------------------------------------------------------------- - * Function: H5C__serialize_cache - * - * Purpose: Serialize (i.e. construct an on disk image) for all entries - * in the metadata cache including clean entries. - * - * Note that flush dependencies and "flush me last" flags - * must be observed in the serialization process. - * - * Note also that entries may be loaded, flushed, evicted, - * expunged, relocated, resized, or removed from the cache - * during this process, just as these actions may occur during - * a regular flush. - * - * However, we are given that the cache will contain no protected - * entries on entry to this routine (although entries may be - * briefly protected and then unprotected during the serialize - * process). - * - * The objective of this routine is serialize all entries and - * to force all entries into their actual locations on disk. - * - * The initial need for this routine is to settle all entries - * in the cache prior to construction of the metadata cache - * image so that the size of the cache image can be calculated. - * However, I gather that other uses for the routine are - * under consideration. - * - * Return: Non-negative on success/Negative on failure or if there was - * a request to flush all items and something was protected. - * - * Programmer: John Mainzer - * 7/22/15 - * - *------------------------------------------------------------------------- - */ - herr_t H5C__serialize_cache(H5F_t * f) - { +/*------------------------------------------------------------------------- + * Function: H5C__serialize_cache + * + * Purpose: Serialize (i.e. construct an on disk image) for all entries + * in the metadata cache including clean entries. + * + * Note that flush dependencies and "flush me last" flags + * must be observed in the serialization process. + * + * Note also that entries may be loaded, flushed, evicted, + * expunged, relocated, resized, or removed from the cache + * during this process, just as these actions may occur during + * a regular flush. + * + * However, we are given that the cache will contain no protected + * entries on entry to this routine (although entries may be + * briefly protected and then unprotected during the serialize + * process). + * + * The objective of this routine is serialize all entries and + * to force all entries into their actual locations on disk. + * + * The initial need for this routine is to settle all entries + * in the cache prior to construction of the metadata cache + * image so that the size of the cache image can be calculated. + * However, I gather that other uses for the routine are + * under consideration. + * + * Return: Non-negative on success/Negative on failure or if there was + * a request to flush all items and something was protected. + * + * Programmer: John Mainzer + * 7/22/15 + * + *------------------------------------------------------------------------- + */ +herr_t +H5C__serialize_cache(H5F_t *f) +{ #if H5C_DO_SANITY_CHECKS - int i; - uint32_t index_len = 0; - size_t index_size = (size_t)0; - size_t clean_index_size = (size_t)0; - size_t dirty_index_size = (size_t)0; - size_t slist_size = (size_t)0; - uint32_t slist_len = 0; + int i; + uint32_t index_len = 0; + size_t index_size = (size_t)0; + size_t clean_index_size = (size_t)0; + size_t dirty_index_size = (size_t)0; + size_t slist_size = (size_t)0; + uint32_t slist_len = 0; #endif /* H5C_DO_SANITY_CHECKS */ - H5C_ring_t ring; - H5C_t *cache_ptr; - herr_t ret_value = SUCCEED; + H5C_ring_t ring; + H5C_t *cache_ptr; + herr_t ret_value = SUCCEED; - FUNC_ENTER_PACKAGE + FUNC_ENTER_PACKAGE - /* Sanity checks */ - HDassert(f); - HDassert(f->shared); - cache_ptr = f->shared->cache; - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - HDassert(cache_ptr->slist_ptr); + /* Sanity checks */ + HDassert(f); + HDassert(f->shared); + cache_ptr = f->shared->cache; + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(cache_ptr->slist_ptr); #if H5C_DO_SANITY_CHECKS - HDassert(cache_ptr->index_ring_len[H5C_RING_UNDEFINED] == 0); - HDassert(cache_ptr->index_ring_size[H5C_RING_UNDEFINED] == (size_t)0); - HDassert(cache_ptr->clean_index_ring_size[H5C_RING_UNDEFINED] == (size_t)0); - HDassert(cache_ptr->dirty_index_ring_size[H5C_RING_UNDEFINED] == (size_t)0); - HDassert(cache_ptr->slist_ring_len[H5C_RING_UNDEFINED] == 0); - HDassert(cache_ptr->slist_ring_size[H5C_RING_UNDEFINED] == (size_t)0); + HDassert(cache_ptr->index_ring_len[H5C_RING_UNDEFINED] == 0); + HDassert(cache_ptr->index_ring_size[H5C_RING_UNDEFINED] == (size_t)0); + HDassert(cache_ptr->clean_index_ring_size[H5C_RING_UNDEFINED] == (size_t)0); + HDassert(cache_ptr->dirty_index_ring_size[H5C_RING_UNDEFINED] == (size_t)0); + HDassert(cache_ptr->slist_ring_len[H5C_RING_UNDEFINED] == 0); + HDassert(cache_ptr->slist_ring_size[H5C_RING_UNDEFINED] == (size_t)0); - for (i = H5C_RING_USER; i < H5C_RING_NTYPES; i++) { - index_len += cache_ptr->index_ring_len[i]; - index_size += cache_ptr->index_ring_size[i]; - clean_index_size += cache_ptr->clean_index_ring_size[i]; - dirty_index_size += cache_ptr->dirty_index_ring_size[i]; + for (i = H5C_RING_USER; i < H5C_RING_NTYPES; i++) { + index_len += cache_ptr->index_ring_len[i]; + index_size += cache_ptr->index_ring_size[i]; + clean_index_size += cache_ptr->clean_index_ring_size[i]; + dirty_index_size += cache_ptr->dirty_index_ring_size[i]; - slist_len += cache_ptr->slist_ring_len[i]; - slist_size += cache_ptr->slist_ring_size[i]; - } /* end for */ + slist_len += cache_ptr->slist_ring_len[i]; + slist_size += cache_ptr->slist_ring_size[i]; + } /* end for */ - HDassert(cache_ptr->index_len == index_len); - HDassert(cache_ptr->index_size == index_size); - HDassert(cache_ptr->clean_index_size == clean_index_size); - HDassert(cache_ptr->dirty_index_size == dirty_index_size); - HDassert(cache_ptr->slist_len == slist_len); - HDassert(cache_ptr->slist_size == slist_size); + HDassert(cache_ptr->index_len == index_len); + HDassert(cache_ptr->index_size == index_size); + HDassert(cache_ptr->clean_index_size == clean_index_size); + HDassert(cache_ptr->dirty_index_size == dirty_index_size); + HDassert(cache_ptr->slist_len == slist_len); + HDassert(cache_ptr->slist_size == slist_size); #endif /* H5C_DO_SANITY_CHECKS */ #if H5C_DO_EXTREME_SANITY_CHECKS - if ((H5C_validate_protected_entry_list(cache_ptr) < 0) || - (H5C_validate_pinned_entry_list(cache_ptr) < 0) || (H5C_validate_lru_list(cache_ptr) < 0)) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "an extreme sanity check failed on entry") + if ((H5C_validate_protected_entry_list(cache_ptr) < 0) || + (H5C_validate_pinned_entry_list(cache_ptr) < 0) || (H5C_validate_lru_list(cache_ptr) < 0)) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "an extreme sanity check failed on entry") #endif /* H5C_DO_EXTREME_SANITY_CHECKS */ #ifndef NDEBUG - /* if this is a debug build, set the serialization_count field of - * each entry in the cache to zero before we start the serialization. - * This allows us to detect the case in which any entry is serialized - * more than once (a performance issues), and more importantly, the - * case is which any flush dependency parent is serializes more than - * once (a correctness issue). - */ - { - H5C_cache_entry_t *scan_ptr = NULL; - - scan_ptr = cache_ptr->il_head; - while (scan_ptr != NULL) { - HDassert(scan_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - scan_ptr->serialization_count = 0; - scan_ptr = scan_ptr->il_next; - } /* end while */ - } /* end block */ -#endif /* NDEBUG */ - - /* set cache_ptr->serialization_in_progress to TRUE, and back - * to FALSE at the end of the function. Must maintain this flag - * to support H5C_get_serialization_in_progress(), which is in - * turn required to support sanity checking in some cache - * clients. - */ - HDassert(!cache_ptr->serialization_in_progress); - cache_ptr->serialization_in_progress = TRUE; + /* if this is a debug build, set the serialization_count field of + * each entry in the cache to zero before we start the serialization. + * This allows us to detect the case in which any entry is serialized + * more than once (a performance issues), and more importantly, the + * case is which any flush dependency parent is serializes more than + * once (a correctness issue). + */ + { + H5C_cache_entry_t *scan_ptr = NULL; - /* Serialize each ring, starting from the outermost ring and - * working inward. - */ - ring = H5C_RING_USER; - while (ring < H5C_RING_NTYPES) { - HDassert(cache_ptr->close_warning_received); - switch (ring) { - case H5C_RING_USER: - break; + scan_ptr = cache_ptr->il_head; + while (scan_ptr != NULL) { + HDassert(scan_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + scan_ptr->serialization_count = 0; + scan_ptr = scan_ptr->il_next; + } /* end while */ + } /* end block */ +#endif /* NDEBUG */ - case H5C_RING_RDFSM: - /* Settle raw data FSM */ - if (!cache_ptr->rdfsm_settled) - if (H5MF_settle_raw_data_fsm(f, &cache_ptr->rdfsm_settled) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "RD FSM settle failed") - break; + /* set cache_ptr->serialization_in_progress to TRUE, and back + * to FALSE at the end of the function. Must maintain this flag + * to support H5C_get_serialization_in_progress(), which is in + * turn required to support sanity checking in some cache + * clients. + */ + HDassert(!cache_ptr->serialization_in_progress); + cache_ptr->serialization_in_progress = TRUE; - case H5C_RING_MDFSM: - /* Settle metadata FSM */ - if (!cache_ptr->mdfsm_settled) - if (H5MF_settle_meta_data_fsm(f, &cache_ptr->mdfsm_settled) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "MD FSM settle failed") - break; + /* Serialize each ring, starting from the outermost ring and + * working inward. + */ + ring = H5C_RING_USER; + while (ring < H5C_RING_NTYPES) { + HDassert(cache_ptr->close_warning_received); + switch (ring) { + case H5C_RING_USER: + break; - case H5C_RING_SBE: - case H5C_RING_SB: - break; + case H5C_RING_RDFSM: + /* Settle raw data FSM */ + if (!cache_ptr->rdfsm_settled) + if (H5MF_settle_raw_data_fsm(f, &cache_ptr->rdfsm_settled) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "RD FSM settle failed") + break; - default: - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Unknown ring?!?!") - break; - } /* end switch */ + case H5C_RING_MDFSM: + /* Settle metadata FSM */ + if (!cache_ptr->mdfsm_settled) + if (H5MF_settle_meta_data_fsm(f, &cache_ptr->mdfsm_settled) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "MD FSM settle failed") + break; - if (H5C__serialize_ring(f, ring) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTSERIALIZE, FAIL, "serialize ring failed") + case H5C_RING_SBE: + case H5C_RING_SB: + break; - ring++; - } /* end while */ + default: + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Unknown ring?!?!") + break; + } /* end switch */ + + if (H5C__serialize_ring(f, ring) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTSERIALIZE, FAIL, "serialize ring failed") + + ring++; + } /* end while */ #ifndef NDEBUG - /* Verify that no entry has been serialized more than once. - * FD parents with multiple serializations should have been caught - * elsewhere, so no specific check for them here. - */ - { - H5C_cache_entry_t *scan_ptr = NULL; + /* Verify that no entry has been serialized more than once. + * FD parents with multiple serializations should have been caught + * elsewhere, so no specific check for them here. + */ + { + H5C_cache_entry_t *scan_ptr = NULL; - scan_ptr = cache_ptr->il_head; - while (scan_ptr != NULL) { - HDassert(scan_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(scan_ptr->serialization_count <= 1); + scan_ptr = cache_ptr->il_head; + while (scan_ptr != NULL) { + HDassert(scan_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(scan_ptr->serialization_count <= 1); - scan_ptr = scan_ptr->il_next; - } /* end while */ - } /* end block */ -#endif /* NDEBUG */ + scan_ptr = scan_ptr->il_next; + } /* end while */ + } /* end block */ +#endif /* NDEBUG */ done: - cache_ptr->serialization_in_progress = FALSE; - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__serialize_cache() */ + cache_ptr->serialization_in_progress = FALSE; + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C__serialize_cache() */ - /*------------------------------------------------------------------------- - * Function: H5C__serialize_ring - * - * Purpose: Serialize the entries contained in the specified cache and - * ring. All entries in rings outside the specified ring - * must have been serialized on entry. - * - * If the cache contains protected entries in the specified - * ring, the function will fail, as protected entries cannot - * be serialized. However all unprotected entries in the - * target ring should be serialized before the function - * returns failure. - * - * If flush dependencies appear in the target ring, the - * function makes repeated passes through the index list - * serializing entries in flush dependency order. - * - * All entries outside the H5C_RING_SBE are marked for - * inclusion in the cache image. Entries in H5C_RING_SBE - * and below are marked for exclusion from the image. - * - * Return: Non-negative on success/Negative on failure or if there was - * a request to flush all items and something was protected. - * - * Programmer: John Mainzer - * 9/11/15 - * - *------------------------------------------------------------------------- - */ - static herr_t H5C__serialize_ring(H5F_t * f, H5C_ring_t ring) - { - hbool_t done = FALSE; - H5C_t *cache_ptr; - H5C_cache_entry_t *entry_ptr; - herr_t ret_value = SUCCEED; +/*------------------------------------------------------------------------- + * Function: H5C__serialize_ring + * + * Purpose: Serialize the entries contained in the specified cache and + * ring. All entries in rings outside the specified ring + * must have been serialized on entry. + * + * If the cache contains protected entries in the specified + * ring, the function will fail, as protected entries cannot + * be serialized. However all unprotected entries in the + * target ring should be serialized before the function + * returns failure. + * + * If flush dependencies appear in the target ring, the + * function makes repeated passes through the index list + * serializing entries in flush dependency order. + * + * All entries outside the H5C_RING_SBE are marked for + * inclusion in the cache image. Entries in H5C_RING_SBE + * and below are marked for exclusion from the image. + * + * Return: Non-negative on success/Negative on failure or if there was + * a request to flush all items and something was protected. + * + * Programmer: John Mainzer + * 9/11/15 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C__serialize_ring(H5F_t *f, H5C_ring_t ring) +{ + hbool_t done = FALSE; + H5C_t *cache_ptr; + H5C_cache_entry_t *entry_ptr; + herr_t ret_value = SUCCEED; - FUNC_ENTER_STATIC + FUNC_ENTER_STATIC - /* Sanity checks */ - HDassert(f); - HDassert(f->shared); - cache_ptr = f->shared->cache; - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - HDassert(ring > H5C_RING_UNDEFINED); - HDassert(ring < H5C_RING_NTYPES); - - HDassert(cache_ptr->serialization_in_progress); - - /* The objective here is to serialize all entries in the cache ring - * in flush dependency order. - * - * The basic algorithm is to scan the cache index list looking for - * unserialized entries that are either not in a flush dependency - * relationship, or which have no unserialized children. Any such - * entry is serialized and its flush dependency parents (if any) are - * informed -- allowing them to decrement their userialized child counts. - * - * However, this algorithm is complicated by the ability - * of client serialization callbacks to perform operations on - * on the cache which can result in the insertion, deletion, - * relocation, resize, dirty, flush, eviction, or removal (via the - * take ownership flag) of entries. Changes in the flush dependency - * structure are also possible. - * - * On the other hand, the algorithm is simplified by the fact that - * we are serializing, not flushing. Thus, as long as all entries - * are serialized correctly, it doesn't matter if we have to go back - * and serialize an entry a second time. - * - * These possible actions result in the following modifications to - * the basic algorithm: - * - * 1) In the event of an entry expunge, eviction or removal, we must - * restart the scan as it is possible that the next entry in our - * scan is no longer in the cache. Were we to examine this entry, - * we would be accessing deallocated memory. - * - * 2) A resize, dirty, or insertion of an entry may result in the - * the increment of a flush dependency parent's dirty and/or - * unserialized child count. In the context of serializing the - * the cache, this is a non-issue, as even if we have already - * serialized the parent, it will be marked dirty and its image - * marked out of date if appropriate when the child is serialized. - * - * However, this is a major issue for a flush, as were this to happen - * in a flush, it would violate the invariant that the flush dependency - * feature is intended to enforce. As the metadata cache has no - * control over the behavior of cache clients, it has no way of - * preventing this behaviour. However, it should detect it if at all - * possible. - * - * Do this by maintaining a count of the number of times each entry is - * serialized during a cache serialization. If any flush dependency - * parent is serialized more than once, throw an assertion failure. - * - * 3) An entry relocation will typically change the location of the - * entry in the index list. This shouldn't cause problems as we - * will scan the index list until we make a complete pass without - * finding anything to serialize -- making relocations of either - * the current or next entries irrelevant. - * - * Note that since a relocation may result in our skipping part of - * the index list, we must always do at least one more pass through - * the index list after an entry relocation. - * - * 4) Changes in the flush dependency structure are possible on - * entry insertion, load, expunge, evict, or remove. Destruction - * of a flush dependency has no effect, as it can only relax the - * flush dependencies. Creation of a flush dependency can create - * an unserialized child of a flush dependency parent where all - * flush dependency children were previously serialized. Should - * this child dirty the flush dependency parent when it is serialized, - * the parent will be re-serialized. - * - * Per the discussion of 2) above, this is a non issue for cache - * serialization, and a major problem for cache flush. Using the - * same detection mechanism, throw an assertion failure if this - * condition appears. - * - * Observe that either eviction or removal of entries as a result of - * a serialization is not a problem as long as the flush dependency - * tree does not change beyond the removal of a leaf. + /* Sanity checks */ + HDassert(f); + HDassert(f->shared); + cache_ptr = f->shared->cache; + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(ring > H5C_RING_UNDEFINED); + HDassert(ring < H5C_RING_NTYPES); + + HDassert(cache_ptr->serialization_in_progress); + + /* The objective here is to serialize all entries in the cache ring + * in flush dependency order. + * + * The basic algorithm is to scan the cache index list looking for + * unserialized entries that are either not in a flush dependency + * relationship, or which have no unserialized children. Any such + * entry is serialized and its flush dependency parents (if any) are + * informed -- allowing them to decrement their userialized child counts. + * + * However, this algorithm is complicated by the ability + * of client serialization callbacks to perform operations on + * on the cache which can result in the insertion, deletion, + * relocation, resize, dirty, flush, eviction, or removal (via the + * take ownership flag) of entries. Changes in the flush dependency + * structure are also possible. + * + * On the other hand, the algorithm is simplified by the fact that + * we are serializing, not flushing. Thus, as long as all entries + * are serialized correctly, it doesn't matter if we have to go back + * and serialize an entry a second time. + * + * These possible actions result in the following modifications to + * the basic algorithm: + * + * 1) In the event of an entry expunge, eviction or removal, we must + * restart the scan as it is possible that the next entry in our + * scan is no longer in the cache. Were we to examine this entry, + * we would be accessing deallocated memory. + * + * 2) A resize, dirty, or insertion of an entry may result in the + * the increment of a flush dependency parent's dirty and/or + * unserialized child count. In the context of serializing the + * the cache, this is a non-issue, as even if we have already + * serialized the parent, it will be marked dirty and its image + * marked out of date if appropriate when the child is serialized. + * + * However, this is a major issue for a flush, as were this to happen + * in a flush, it would violate the invariant that the flush dependency + * feature is intended to enforce. As the metadata cache has no + * control over the behavior of cache clients, it has no way of + * preventing this behaviour. However, it should detect it if at all + * possible. + * + * Do this by maintaining a count of the number of times each entry is + * serialized during a cache serialization. If any flush dependency + * parent is serialized more than once, throw an assertion failure. + * + * 3) An entry relocation will typically change the location of the + * entry in the index list. This shouldn't cause problems as we + * will scan the index list until we make a complete pass without + * finding anything to serialize -- making relocations of either + * the current or next entries irrelevant. + * + * Note that since a relocation may result in our skipping part of + * the index list, we must always do at least one more pass through + * the index list after an entry relocation. + * + * 4) Changes in the flush dependency structure are possible on + * entry insertion, load, expunge, evict, or remove. Destruction + * of a flush dependency has no effect, as it can only relax the + * flush dependencies. Creation of a flush dependency can create + * an unserialized child of a flush dependency parent where all + * flush dependency children were previously serialized. Should + * this child dirty the flush dependency parent when it is serialized, + * the parent will be re-serialized. + * + * Per the discussion of 2) above, this is a non issue for cache + * serialization, and a major problem for cache flush. Using the + * same detection mechanism, throw an assertion failure if this + * condition appears. + * + * Observe that either eviction or removal of entries as a result of + * a serialization is not a problem as long as the flush dependency + * tree does not change beyond the removal of a leaf. + */ + while (!done) { + /* Reset the counters so that we can detect insertions, loads, + * moves, and flush dependency height changes caused by the pre_serialize + * and serialize callbacks. */ - while (!done) { - /* Reset the counters so that we can detect insertions, loads, - * moves, and flush dependency height changes caused by the pre_serialize - * and serialize callbacks. + cache_ptr->entries_loaded_counter = 0; + cache_ptr->entries_inserted_counter = 0; + cache_ptr->entries_relocated_counter = 0; + + done = TRUE; /* set to FALSE if any activity in inner loop */ + entry_ptr = cache_ptr->il_head; + while (entry_ptr != NULL) { + HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + + /* Verify that either the entry is already serialized, or + * that it is assigned to either the target or an inner + * ring. */ - cache_ptr->entries_loaded_counter = 0; - cache_ptr->entries_inserted_counter = 0; - cache_ptr->entries_relocated_counter = 0; - - done = TRUE; /* set to FALSE if any activity in inner loop */ - entry_ptr = cache_ptr->il_head; - while (entry_ptr != NULL) { - HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - - /* Verify that either the entry is already serialized, or - * that it is assigned to either the target or an inner - * ring. - */ - HDassert((entry_ptr->ring >= ring) || (entry_ptr->image_up_to_date)); + HDassert((entry_ptr->ring >= ring) || (entry_ptr->image_up_to_date)); - /* Skip flush me last entries or inner ring entries */ - if (!entry_ptr->flush_me_last && entry_ptr->ring == ring) { + /* Skip flush me last entries or inner ring entries */ + if (!entry_ptr->flush_me_last && entry_ptr->ring == ring) { - /* if we encounter an unserialized entry in the current - * ring that is not marked flush me last, we are not done. - */ - if (!entry_ptr->image_up_to_date) - done = FALSE; + /* if we encounter an unserialized entry in the current + * ring that is not marked flush me last, we are not done. + */ + if (!entry_ptr->image_up_to_date) + done = FALSE; - /* Serialize the entry if its image is not up to date - * and it has no unserialized flush dependency children. - */ - if (!entry_ptr->image_up_to_date && entry_ptr->flush_dep_nunser_children == 0) { - HDassert(entry_ptr->serialization_count == 0); + /* Serialize the entry if its image is not up to date + * and it has no unserialized flush dependency children. + */ + if (!entry_ptr->image_up_to_date && entry_ptr->flush_dep_nunser_children == 0) { + HDassert(entry_ptr->serialization_count == 0); - /* Serialize the entry */ - if (H5C__serialize_single_entry(f, cache_ptr, entry_ptr) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTSERIALIZE, FAIL, "entry serialization failed") + /* Serialize the entry */ + if (H5C__serialize_single_entry(f, cache_ptr, entry_ptr) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTSERIALIZE, FAIL, "entry serialization failed") - HDassert(entry_ptr->flush_dep_nunser_children == 0); - HDassert(entry_ptr->serialization_count == 0); + HDassert(entry_ptr->flush_dep_nunser_children == 0); + HDassert(entry_ptr->serialization_count == 0); #ifndef NDEBUG - /* Increment serialization counter (to detect multiple serializations) */ - entry_ptr->serialization_count++; -#endif /* NDEBUG */ - } /* end if */ - } /* end if */ + /* Increment serialization counter (to detect multiple serializations) */ + entry_ptr->serialization_count++; +#endif /* NDEBUG */ + } /* end if */ + } /* end if */ - /* Check for the cache being perturbed during the entry serialize */ - if ((cache_ptr->entries_loaded_counter > 0) || (cache_ptr->entries_inserted_counter > 0) || - (cache_ptr->entries_relocated_counter > 0)) { + /* Check for the cache being perturbed during the entry serialize */ + if ((cache_ptr->entries_loaded_counter > 0) || (cache_ptr->entries_inserted_counter > 0) || + (cache_ptr->entries_relocated_counter > 0)) { #if H5C_COLLECT_CACHE_STATS - H5C__UPDATE_STATS_FOR_INDEX_SCAN_RESTART(cache_ptr); + H5C__UPDATE_STATS_FOR_INDEX_SCAN_RESTART(cache_ptr); #endif /* H5C_COLLECT_CACHE_STATS */ - /* Reset the counters */ - cache_ptr->entries_loaded_counter = 0; - cache_ptr->entries_inserted_counter = 0; - cache_ptr->entries_relocated_counter = 0; + /* Reset the counters */ + cache_ptr->entries_loaded_counter = 0; + cache_ptr->entries_inserted_counter = 0; + cache_ptr->entries_relocated_counter = 0; - /* Restart scan */ - entry_ptr = cache_ptr->il_head; - } /* end if */ - else - /* Advance to next entry */ - entry_ptr = entry_ptr->il_next; - } /* while ( entry_ptr != NULL ) */ - } /* while ( ! done ) */ + /* Restart scan */ + entry_ptr = cache_ptr->il_head; + } /* end if */ + else + /* Advance to next entry */ + entry_ptr = entry_ptr->il_next; + } /* while ( entry_ptr != NULL ) */ + } /* while ( ! done ) */ - /* Reset the counters so that we can detect insertions, loads, - * moves, and flush dependency height changes caused by the pre_serialize - * and serialize callbacks. - */ - cache_ptr->entries_loaded_counter = 0; - cache_ptr->entries_inserted_counter = 0; - cache_ptr->entries_relocated_counter = 0; + /* Reset the counters so that we can detect insertions, loads, + * moves, and flush dependency height changes caused by the pre_serialize + * and serialize callbacks. + */ + cache_ptr->entries_loaded_counter = 0; + cache_ptr->entries_inserted_counter = 0; + cache_ptr->entries_relocated_counter = 0; + + /* At this point, all entries not marked "flush me last" and in + * the current ring or outside it should be serialized and have up + * to date images. Scan the index list again to serialize the + * "flush me last" entries (if they are in the current ring) and to + * verify that all other entries have up to date images. + */ + entry_ptr = cache_ptr->il_head; + while (entry_ptr != NULL) { + HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(entry_ptr->ring > H5C_RING_UNDEFINED); + HDassert(entry_ptr->ring < H5C_RING_NTYPES); + HDassert((entry_ptr->ring >= ring) || (entry_ptr->image_up_to_date)); + + if (entry_ptr->ring == ring) { + if (entry_ptr->flush_me_last) { + if (!entry_ptr->image_up_to_date) { + HDassert(entry_ptr->serialization_count == 0); + HDassert(entry_ptr->flush_dep_nunser_children == 0); - /* At this point, all entries not marked "flush me last" and in - * the current ring or outside it should be serialized and have up - * to date images. Scan the index list again to serialize the - * "flush me last" entries (if they are in the current ring) and to - * verify that all other entries have up to date images. - */ - entry_ptr = cache_ptr->il_head; - while (entry_ptr != NULL) { - HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(entry_ptr->ring > H5C_RING_UNDEFINED); - HDassert(entry_ptr->ring < H5C_RING_NTYPES); - HDassert((entry_ptr->ring >= ring) || (entry_ptr->image_up_to_date)); + /* Serialize the entry */ + if (H5C__serialize_single_entry(f, cache_ptr, entry_ptr) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTSERIALIZE, FAIL, "entry serialization failed") + + /* Check for the cache changing */ + if ((cache_ptr->entries_loaded_counter > 0) || + (cache_ptr->entries_inserted_counter > 0) || + (cache_ptr->entries_relocated_counter > 0)) + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, + "flush_me_last entry serialization triggered restart") - if (entry_ptr->ring == ring) { - if (entry_ptr->flush_me_last) { - if (!entry_ptr->image_up_to_date) { - HDassert(entry_ptr->serialization_count == 0); - HDassert(entry_ptr->flush_dep_nunser_children == 0); - - /* Serialize the entry */ - if (H5C__serialize_single_entry(f, cache_ptr, entry_ptr) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTSERIALIZE, FAIL, "entry serialization failed") - - /* Check for the cache changing */ - if ((cache_ptr->entries_loaded_counter > 0) || - (cache_ptr->entries_inserted_counter > 0) || - (cache_ptr->entries_relocated_counter > 0)) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, - "flush_me_last entry serialization triggered restart") - - HDassert(entry_ptr->flush_dep_nunser_children == 0); - HDassert(entry_ptr->serialization_count == 0); -#ifndef NDEBUG - /* Increment serialization counter (to detect multiple serializations) */ - entry_ptr->serialization_count++; -#endif /* NDEBUG */ - } /* end if */ - } /* end if */ - else { - HDassert(entry_ptr->image_up_to_date); - HDassert(entry_ptr->serialization_count <= 1); HDassert(entry_ptr->flush_dep_nunser_children == 0); - } /* end else */ - } /* if ( entry_ptr->ring == ring ) */ + HDassert(entry_ptr->serialization_count == 0); +#ifndef NDEBUG + /* Increment serialization counter (to detect multiple serializations) */ + entry_ptr->serialization_count++; +#endif /* NDEBUG */ + } /* end if */ + } /* end if */ + else { + HDassert(entry_ptr->image_up_to_date); + HDassert(entry_ptr->serialization_count <= 1); + HDassert(entry_ptr->flush_dep_nunser_children == 0); + } /* end else */ + } /* if ( entry_ptr->ring == ring ) */ - entry_ptr = entry_ptr->il_next; - } /* while ( entry_ptr != NULL ) */ + entry_ptr = entry_ptr->il_next; + } /* while ( entry_ptr != NULL ) */ done: - HDassert(cache_ptr->serialization_in_progress); - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__serialize_ring() */ + HDassert(cache_ptr->serialization_in_progress); + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C__serialize_ring() */ - /*------------------------------------------------------------------------- - * Function: H5C__serialize_single_entry - * - * Purpose: Serialize the cache entry pointed to by the entry_ptr - * parameter. - * - * Return: Non-negative on success/Negative on failure - * - * Programmer: John Mainzer, 7/24/15 - * - *------------------------------------------------------------------------- - */ - static herr_t H5C__serialize_single_entry(H5F_t * f, H5C_t * cache_ptr, H5C_cache_entry_t * entry_ptr) - { - herr_t ret_value = SUCCEED; /* Return value */ +/*------------------------------------------------------------------------- + * Function: H5C__serialize_single_entry + * + * Purpose: Serialize the cache entry pointed to by the entry_ptr + * parameter. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: John Mainzer, 7/24/15 + * + *------------------------------------------------------------------------- + */ +static herr_t +H5C__serialize_single_entry(H5F_t *f, H5C_t *cache_ptr, H5C_cache_entry_t *entry_ptr) +{ + herr_t ret_value = SUCCEED; /* Return value */ - FUNC_ENTER_STATIC + FUNC_ENTER_STATIC - /* Sanity checks */ - HDassert(f); - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - HDassert(entry_ptr); - HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(!entry_ptr->prefetched); - HDassert(!entry_ptr->image_up_to_date); - HDassert(entry_ptr->is_dirty); - HDassert(!entry_ptr->is_protected); - HDassert(!entry_ptr->flush_in_progress); - HDassert(entry_ptr->type); + /* Sanity checks */ + HDassert(f); + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(entry_ptr); + HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(!entry_ptr->prefetched); + HDassert(!entry_ptr->image_up_to_date); + HDassert(entry_ptr->is_dirty); + HDassert(!entry_ptr->is_protected); + HDassert(!entry_ptr->flush_in_progress); + HDassert(entry_ptr->type); - /* Set entry_ptr->flush_in_progress to TRUE so the the target entry - * will not be evicted out from under us. Must set it back to FALSE - * when we are done. - */ - entry_ptr->flush_in_progress = TRUE; + /* Set entry_ptr->flush_in_progress to TRUE so the the target entry + * will not be evicted out from under us. Must set it back to FALSE + * when we are done. + */ + entry_ptr->flush_in_progress = TRUE; - /* Allocate buffer for the entry image if required. */ - if (NULL == entry_ptr->image_ptr) { - HDassert(entry_ptr->size > 0); - if (NULL == (entry_ptr->image_ptr = H5MM_malloc(entry_ptr->size + H5C_IMAGE_EXTRA_SPACE))) - HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, - "memory allocation failed for on disk image buffer") + /* Allocate buffer for the entry image if required. */ + if (NULL == entry_ptr->image_ptr) { + HDassert(entry_ptr->size > 0); + if (NULL == (entry_ptr->image_ptr = H5MM_malloc(entry_ptr->size + H5C_IMAGE_EXTRA_SPACE))) + HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, "memory allocation failed for on disk image buffer") #if H5C_DO_MEMORY_SANITY_CHECKS - H5MM_memcpy(((uint8_t *)entry_ptr->image_ptr) + image_size, H5C_IMAGE_SANITY_VALUE, - H5C_IMAGE_EXTRA_SPACE); -#endif /* H5C_DO_MEMORY_SANITY_CHECKS */ - } /* end if */ + H5MM_memcpy(((uint8_t *)entry_ptr->image_ptr) + image_size, H5C_IMAGE_SANITY_VALUE, + H5C_IMAGE_EXTRA_SPACE); +#endif /* H5C_DO_MEMORY_SANITY_CHECKS */ + } /* end if */ - /* Generate image for entry */ - if (H5C__generate_image(f, cache_ptr, entry_ptr) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTSERIALIZE, FAIL, "Can't generate image for cache entry") + /* Generate image for entry */ + if (H5C__generate_image(f, cache_ptr, entry_ptr) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTSERIALIZE, FAIL, "Can't generate image for cache entry") - /* Reset the flush_in progress flag */ - entry_ptr->flush_in_progress = FALSE; + /* Reset the flush_in progress flag */ + entry_ptr->flush_in_progress = FALSE; done: - HDassert((ret_value != SUCCEED) || (!entry_ptr->flush_in_progress)); - HDassert((ret_value != SUCCEED) || (entry_ptr->image_up_to_date)); - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__serialize_single_entry() */ + HDassert((ret_value != SUCCEED) || (!entry_ptr->flush_in_progress)); + HDassert((ret_value != SUCCEED) || (entry_ptr->image_up_to_date)); + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C__serialize_single_entry() */ - /*------------------------------------------------------------------------- - * Function: H5C__generate_image - * - * Purpose: Serialize an entry and generate its image. - * - * Note: This may cause the entry to be re-sized and/or moved in - * the cache. - * - * As we will not update the metadata cache's data structures - * until we we finish the write, we must touch up these - * data structures for size and location changes even if we - * are about to delete the entry from the cache (i.e. on a - * flush destroy). - * - * Return: Non-negative on success/Negative on failure - * - * Programmer: Mohamad Chaarawi - * 2/10/16 - * - * Changes: Updated sanity checks for the possibility that the skip - * list is disabled. - * JRM 5/16/20 - * - *------------------------------------------------------------------------- - */ - herr_t H5C__generate_image(H5F_t * f, H5C_t * cache_ptr, H5C_cache_entry_t * entry_ptr) - { - haddr_t new_addr = HADDR_UNDEF; - haddr_t old_addr = HADDR_UNDEF; - size_t new_len = 0; - unsigned serialize_flags = H5C__SERIALIZE_NO_FLAGS_SET; - herr_t ret_value = SUCCEED; +/*------------------------------------------------------------------------- + * Function: H5C__generate_image + * + * Purpose: Serialize an entry and generate its image. + * + * Note: This may cause the entry to be re-sized and/or moved in + * the cache. + * + * As we will not update the metadata cache's data structures + * until we we finish the write, we must touch up these + * data structures for size and location changes even if we + * are about to delete the entry from the cache (i.e. on a + * flush destroy). + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Mohamad Chaarawi + * 2/10/16 + * + * Changes: Updated sanity checks for the possibility that the skip + * list is disabled. + * JRM 5/16/20 + * + *------------------------------------------------------------------------- + */ +herr_t +H5C__generate_image(H5F_t *f, H5C_t *cache_ptr, H5C_cache_entry_t *entry_ptr) +{ + haddr_t new_addr = HADDR_UNDEF; + haddr_t old_addr = HADDR_UNDEF; + size_t new_len = 0; + unsigned serialize_flags = H5C__SERIALIZE_NO_FLAGS_SET; + herr_t ret_value = SUCCEED; - FUNC_ENTER_PACKAGE + FUNC_ENTER_PACKAGE - /* Sanity check */ - HDassert(f); - HDassert(cache_ptr); - HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); - HDassert(entry_ptr); - HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); - HDassert(!entry_ptr->image_up_to_date); - HDassert(entry_ptr->is_dirty); - HDassert(!entry_ptr->is_protected); - HDassert(entry_ptr->type); + /* Sanity check */ + HDassert(f); + HDassert(cache_ptr); + HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC); + HDassert(entry_ptr); + HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC); + HDassert(!entry_ptr->image_up_to_date); + HDassert(entry_ptr->is_dirty); + HDassert(!entry_ptr->is_protected); + HDassert(entry_ptr->type); - /* make note of the entry's current address */ - old_addr = entry_ptr->addr; + /* make note of the entry's current address */ + old_addr = entry_ptr->addr; - /* Call client's pre-serialize callback, if there's one */ - if ((entry_ptr->type->pre_serialize) && - ((entry_ptr->type->pre_serialize)(f, (void *)entry_ptr, entry_ptr->addr, entry_ptr->size, - &new_addr, &new_len, &serialize_flags) < 0)) + /* Call client's pre-serialize callback, if there's one */ + if ((entry_ptr->type->pre_serialize) && + ((entry_ptr->type->pre_serialize)(f, (void *)entry_ptr, entry_ptr->addr, entry_ptr->size, &new_addr, + &new_len, &serialize_flags) < 0)) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to pre-serialize entry") + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to pre-serialize entry") - /* Check for any flags set in the pre-serialize callback */ - if (serialize_flags != H5C__SERIALIZE_NO_FLAGS_SET) { + /* Check for any flags set in the pre-serialize callback */ + if (serialize_flags != H5C__SERIALIZE_NO_FLAGS_SET) { - /* Check for unexpected flags from serialize callback */ - if (serialize_flags & ~(H5C__SERIALIZE_RESIZED_FLAG | H5C__SERIALIZE_MOVED_FLAG)) + /* Check for unexpected flags from serialize callback */ + if (serialize_flags & ~(H5C__SERIALIZE_RESIZED_FLAG | H5C__SERIALIZE_MOVED_FLAG)) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unknown serialize flag(s)") + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unknown serialize flag(s)") #ifdef H5_HAVE_PARALLEL - /* In the parallel case, resizes and moves in - * the serialize operation can cause problems. - * If they occur, scream and die. - * - * At present, in the parallel case, the aux_ptr - * will only be set if there is more than one - * process. Thus we can use this to detect - * the parallel case. - * - * This works for now, but if we start using the - * aux_ptr for other purposes, we will have to - * change this test accordingly. - * - * NB: While this test detects entryies that attempt - * to resize or move themselves during a flush - * in the parallel case, it will not detect an - * entry that dirties, resizes, and/or moves - * other entries during its flush. - * - * From what Quincey tells me, this test is - * sufficient for now, as any flush routine that - * does the latter will also do the former. - * - * If that ceases to be the case, further - * tests will be necessary. - */ - if (cache_ptr->aux_ptr != NULL) + /* In the parallel case, resizes and moves in + * the serialize operation can cause problems. + * If they occur, scream and die. + * + * At present, in the parallel case, the aux_ptr + * will only be set if there is more than one + * process. Thus we can use this to detect + * the parallel case. + * + * This works for now, but if we start using the + * aux_ptr for other purposes, we will have to + * change this test accordingly. + * + * NB: While this test detects entryies that attempt + * to resize or move themselves during a flush + * in the parallel case, it will not detect an + * entry that dirties, resizes, and/or moves + * other entries during its flush. + * + * From what Quincey tells me, this test is + * sufficient for now, as any flush routine that + * does the latter will also do the former. + * + * If that ceases to be the case, further + * tests will be necessary. + */ + if (cache_ptr->aux_ptr != NULL) - HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "resize/move in serialize occurred in parallel case") + HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "resize/move in serialize occurred in parallel case") #endif - /* If required, resize the buffer and update the entry and the cache - * data structures - */ - if (serialize_flags & H5C__SERIALIZE_RESIZED_FLAG) { + /* If required, resize the buffer and update the entry and the cache + * data structures + */ + if (serialize_flags & H5C__SERIALIZE_RESIZED_FLAG) { - /* Sanity check */ - HDassert(new_len > 0); + /* Sanity check */ + HDassert(new_len > 0); - /* Allocate a new image buffer */ - if (NULL == (entry_ptr->image_ptr = - H5MM_realloc(entry_ptr->image_ptr, new_len + H5C_IMAGE_EXTRA_SPACE))) + /* Allocate a new image buffer */ + if (NULL == + (entry_ptr->image_ptr = H5MM_realloc(entry_ptr->image_ptr, new_len + H5C_IMAGE_EXTRA_SPACE))) - HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, - "memory allocation failed for on disk image buffer") + HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, + "memory allocation failed for on disk image buffer") #if H5C_DO_MEMORY_SANITY_CHECKS - H5MM_memcpy(((uint8_t *)entry_ptr->image_ptr) + new_len, H5C_IMAGE_SANITY_VALUE, - H5C_IMAGE_EXTRA_SPACE); + H5MM_memcpy(((uint8_t *)entry_ptr->image_ptr) + new_len, H5C_IMAGE_SANITY_VALUE, + H5C_IMAGE_EXTRA_SPACE); #endif /* H5C_DO_MEMORY_SANITY_CHECKS */ - /* Update statistics for resizing the entry */ - H5C__UPDATE_STATS_FOR_ENTRY_SIZE_CHANGE(cache_ptr, entry_ptr, new_len); + /* Update statistics for resizing the entry */ + H5C__UPDATE_STATS_FOR_ENTRY_SIZE_CHANGE(cache_ptr, entry_ptr, new_len); - /* Update the hash table for the size change */ - H5C__UPDATE_INDEX_FOR_SIZE_CHANGE(cache_ptr, entry_ptr->size, new_len, entry_ptr, - !(entry_ptr->is_dirty)); + /* Update the hash table for the size change */ + H5C__UPDATE_INDEX_FOR_SIZE_CHANGE(cache_ptr, entry_ptr->size, new_len, entry_ptr, + !(entry_ptr->is_dirty)); - /* The entry can't be protected since we are in the process of - * flushing it. Thus we must update the replacement policy data - * structures for the size change. The macro deals with the pinned - * case. - */ - H5C__UPDATE_RP_FOR_SIZE_CHANGE(cache_ptr, entry_ptr, new_len); + /* The entry can't be protected since we are in the process of + * flushing it. Thus we must update the replacement policy data + * structures for the size change. The macro deals with the pinned + * case. + */ + H5C__UPDATE_RP_FOR_SIZE_CHANGE(cache_ptr, entry_ptr, new_len); - /* As we haven't updated the cache data structures for - * for the flush or flush destroy yet, the entry should - * be in the slist if the slist is enabled. Since - * H5C__UPDATE_SLIST_FOR_SIZE_CHANGE() is a no-op if the - * slist is enabled, call it un-conditionally. - */ - HDassert(entry_ptr->is_dirty); - HDassert((entry_ptr->in_slist) || (!cache_ptr->slist_enabled)); + /* As we haven't updated the cache data structures for + * for the flush or flush destroy yet, the entry should + * be in the slist if the slist is enabled. Since + * H5C__UPDATE_SLIST_FOR_SIZE_CHANGE() is a no-op if the + * slist is enabled, call it un-conditionally. + */ + HDassert(entry_ptr->is_dirty); + HDassert((entry_ptr->in_slist) || (!cache_ptr->slist_enabled)); - H5C__UPDATE_SLIST_FOR_SIZE_CHANGE(cache_ptr, entry_ptr->size, new_len); + H5C__UPDATE_SLIST_FOR_SIZE_CHANGE(cache_ptr, entry_ptr->size, new_len); - /* Finally, update the entry for its new size */ - entry_ptr->size = new_len; + /* Finally, update the entry for its new size */ + entry_ptr->size = new_len; - } /* end if */ + } /* end if */ - /* If required, udate the entry and the cache data structures - * for a move - */ - if (serialize_flags & H5C__SERIALIZE_MOVED_FLAG) { + /* If required, udate the entry and the cache data structures + * for a move + */ + if (serialize_flags & H5C__SERIALIZE_MOVED_FLAG) { - /* Update stats and entries relocated counter */ - H5C__UPDATE_STATS_FOR_MOVE(cache_ptr, entry_ptr) + /* Update stats and entries relocated counter */ + H5C__UPDATE_STATS_FOR_MOVE(cache_ptr, entry_ptr) - /* We must update cache data structures for the change in address */ - if (entry_ptr->addr == old_addr) { + /* We must update cache data structures for the change in address */ + if (entry_ptr->addr == old_addr) { - /* Delete the entry from the hash table and the slist */ - H5C__DELETE_FROM_INDEX(cache_ptr, entry_ptr, FAIL); - H5C__REMOVE_ENTRY_FROM_SLIST(cache_ptr, entry_ptr, FALSE); + /* Delete the entry from the hash table and the slist */ + H5C__DELETE_FROM_INDEX(cache_ptr, entry_ptr, FAIL); + H5C__REMOVE_ENTRY_FROM_SLIST(cache_ptr, entry_ptr, FALSE); - /* Update the entry for its new address */ - entry_ptr->addr = new_addr; + /* Update the entry for its new address */ + entry_ptr->addr = new_addr; - /* And then reinsert in the index and slist */ - H5C__INSERT_IN_INDEX(cache_ptr, entry_ptr, FAIL); - H5C__INSERT_ENTRY_IN_SLIST(cache_ptr, entry_ptr, FAIL); + /* And then reinsert in the index and slist */ + H5C__INSERT_IN_INDEX(cache_ptr, entry_ptr, FAIL); + H5C__INSERT_ENTRY_IN_SLIST(cache_ptr, entry_ptr, FAIL); - } /* end if */ - else { /* move is already done for us -- just do sanity checks */ + } /* end if */ + else { /* move is already done for us -- just do sanity checks */ - HDassert(entry_ptr->addr == new_addr); - } - } /* end if */ - } /* end if(serialize_flags != H5C__SERIALIZE_NO_FLAGS_SET) */ + HDassert(entry_ptr->addr == new_addr); + } + } /* end if */ + } /* end if(serialize_flags != H5C__SERIALIZE_NO_FLAGS_SET) */ - /* Serialize object into buffer */ - if (entry_ptr->type->serialize(f, entry_ptr->image_ptr, entry_ptr->size, (void *)entry_ptr) < 0) + /* Serialize object into buffer */ + if (entry_ptr->type->serialize(f, entry_ptr->image_ptr, entry_ptr->size, (void *)entry_ptr) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to serialize entry") + HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to serialize entry") #if H5C_DO_MEMORY_SANITY_CHECKS - HDassert(0 == HDmemcmp(((uint8_t *)entry_ptr->image_ptr) + entry_ptr->size, H5C_IMAGE_SANITY_VALUE, - H5C_IMAGE_EXTRA_SPACE)); + HDassert(0 == HDmemcmp(((uint8_t *)entry_ptr->image_ptr) + entry_ptr->size, H5C_IMAGE_SANITY_VALUE, + H5C_IMAGE_EXTRA_SPACE)); #endif /* H5C_DO_MEMORY_SANITY_CHECKS */ - entry_ptr->image_up_to_date = TRUE; + entry_ptr->image_up_to_date = TRUE; - /* Propagate the fact that the entry is serialized up the - * flush dependency chain if appropriate. Since the image must - * have been out of date for this function to have been called - * (see assertion on entry), no need to check that -- only check - * for flush dependency parents. - */ - HDassert(entry_ptr->flush_dep_nunser_children == 0); + /* Propagate the fact that the entry is serialized up the + * flush dependency chain if appropriate. Since the image must + * have been out of date for this function to have been called + * (see assertion on entry), no need to check that -- only check + * for flush dependency parents. + */ + HDassert(entry_ptr->flush_dep_nunser_children == 0); - if (entry_ptr->flush_dep_nparents > 0) { + if (entry_ptr->flush_dep_nparents > 0) { - if (H5C__mark_flush_dep_serialized(entry_ptr) < 0) + if (H5C__mark_flush_dep_serialized(entry_ptr) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, - "Can't propagate serialization status to fd parents") - } + HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, "Can't propagate serialization status to fd parents") + } done: - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__generate_image */ - - /*------------------------------------------------------------------------- - * - * Function: H5C_remove_entry - * - * Purpose: Remove an entry from the cache. Must be not protected, pinned, - * dirty, involved in flush dependencies, etc. - * - * Return: Non-negative on success/Negative on failure - * - * Programmer: Quincey Koziol - * September 17, 2016 - * - *------------------------------------------------------------------------- - */ - herr_t H5C_remove_entry(void *_entry) - { - H5C_cache_entry_t *entry = (H5C_cache_entry_t *)_entry; /* Entry to remove */ - H5C_t *cache; /* Cache for file */ - herr_t ret_value = SUCCEED; /* Return value */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C__generate_image */ - FUNC_ENTER_NOAPI(FAIL) +/*------------------------------------------------------------------------- + * + * Function: H5C_remove_entry + * + * Purpose: Remove an entry from the cache. Must be not protected, pinned, + * dirty, involved in flush dependencies, etc. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Quincey Koziol + * September 17, 2016 + * + *------------------------------------------------------------------------- + */ +herr_t +H5C_remove_entry(void *_entry) +{ + H5C_cache_entry_t *entry = (H5C_cache_entry_t *)_entry; /* Entry to remove */ + H5C_t *cache; /* Cache for file */ + herr_t ret_value = SUCCEED; /* Return value */ - /* Sanity checks */ - HDassert(entry); - HDassert(entry->ring != H5C_RING_UNDEFINED); - cache = entry->cache_ptr; - HDassert(cache); - HDassert(cache->magic == H5C__H5C_T_MAGIC); - - /* Check for error conditions */ - if (entry->is_dirty) - HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, "can't remove dirty entry from cache") - if (entry->is_protected) - HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, "can't remove protected entry from cache") - if (entry->is_pinned) - HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, "can't remove pinned entry from cache") - /* NOTE: If these two errors are getting tripped because the entry is - * in a flush dependency with a freedspace entry, move the checks - * after the "before evict" message is sent, and add the - * "child being evicted" message to the "before evict" notify - * section below. QAK - 2017/08/03 - */ - if (entry->flush_dep_nparents > 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, - "can't remove entry with flush dependency parents from cache") - if (entry->flush_dep_nchildren > 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, - "can't remove entry with flush dependency children from cache") - - /* Additional internal cache consistency checks */ - HDassert(!entry->in_slist); - HDassert(!entry->flush_marker); - HDassert(!entry->flush_in_progress); - - /* Note that the algorithm below is (very) similar to the set of operations - * in H5C__flush_single_entry() and should be kept in sync with changes - * to that code. - QAK, 2016/11/30 - */ + FUNC_ENTER_NOAPI(FAIL) - /* Update stats, as if we are "destroying" and taking ownership of the entry */ - H5C__UPDATE_STATS_FOR_EVICTION(cache, entry, TRUE) + /* Sanity checks */ + HDassert(entry); + HDassert(entry->ring != H5C_RING_UNDEFINED); + cache = entry->cache_ptr; + HDassert(cache); + HDassert(cache->magic == H5C__H5C_T_MAGIC); + + /* Check for error conditions */ + if (entry->is_dirty) + HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, "can't remove dirty entry from cache") + if (entry->is_protected) + HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, "can't remove protected entry from cache") + if (entry->is_pinned) + HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, "can't remove pinned entry from cache") + /* NOTE: If these two errors are getting tripped because the entry is + * in a flush dependency with a freedspace entry, move the checks + * after the "before evict" message is sent, and add the + * "child being evicted" message to the "before evict" notify + * section below. QAK - 2017/08/03 + */ + if (entry->flush_dep_nparents > 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, + "can't remove entry with flush dependency parents from cache") + if (entry->flush_dep_nchildren > 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, + "can't remove entry with flush dependency children from cache") + + /* Additional internal cache consistency checks */ + HDassert(!entry->in_slist); + HDassert(!entry->flush_marker); + HDassert(!entry->flush_in_progress); + + /* Note that the algorithm below is (very) similar to the set of operations + * in H5C__flush_single_entry() and should be kept in sync with changes + * to that code. - QAK, 2016/11/30 + */ - /* If the entry's type has a 'notify' callback, send a 'before eviction' - * notice while the entry is still fully integrated in the cache. - */ - if (entry->type->notify && (entry->type->notify)(H5C_NOTIFY_ACTION_BEFORE_EVICT, entry) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, "can't notify client about entry to evict") + /* Update stats, as if we are "destroying" and taking ownership of the entry */ + H5C__UPDATE_STATS_FOR_EVICTION(cache, entry, TRUE) - /* Update the cache internal data structures as appropriate for a destroy. - * Specifically: - * 1) Delete it from the index - * 2) Delete it from the collective read access list - * 3) Update the replacement policy for eviction - * 4) Remove it from the tag list for this object - */ + /* If the entry's type has a 'notify' callback, send a 'before eviction' + * notice while the entry is still fully integrated in the cache. + */ + if (entry->type->notify && (entry->type->notify)(H5C_NOTIFY_ACTION_BEFORE_EVICT, entry) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, "can't notify client about entry to evict") + + /* Update the cache internal data structures as appropriate for a destroy. + * Specifically: + * 1) Delete it from the index + * 2) Delete it from the collective read access list + * 3) Update the replacement policy for eviction + * 4) Remove it from the tag list for this object + */ - H5C__DELETE_FROM_INDEX(cache, entry, FAIL) + H5C__DELETE_FROM_INDEX(cache, entry, FAIL) #ifdef H5_HAVE_PARALLEL - /* Check for collective read access flag */ - if (entry->coll_access) { - entry->coll_access = FALSE; - H5C__REMOVE_FROM_COLL_LIST(cache, entry, FAIL) - } /* end if */ -#endif /* H5_HAVE_PARALLEL */ + /* Check for collective read access flag */ + if (entry->coll_access) { + entry->coll_access = FALSE; + H5C__REMOVE_FROM_COLL_LIST(cache, entry, FAIL) + } /* end if */ +#endif /* H5_HAVE_PARALLEL */ - H5C__UPDATE_RP_FOR_EVICTION(cache, entry, FAIL) + H5C__UPDATE_RP_FOR_EVICTION(cache, entry, FAIL) - /* Remove entry from tag list */ - if (H5C__untag_entry(cache, entry) < 0) - HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, "can't remove entry from tag list") + /* Remove entry from tag list */ + if (H5C__untag_entry(cache, entry) < 0) + HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, "can't remove entry from tag list") - /* Increment entries_removed_counter and set last_entry_removed_ptr. - * As we me be about to free the entry, recall that last_entry_removed_ptr - * must NEVER be dereferenced. - * - * Recall that these fields are maintained to allow functions that perform - * scans of lists of entries to detect the unexpected removal of entries - * (via expunge, eviction, or take ownership at present), so that they can - * re-start their scans if necessary. - * - * Also check if the entry we are watching for removal is being - * removed (usually the 'next' entry for an iteration) and reset - * it to indicate that it was removed. - */ - cache->entries_removed_counter++; - cache->last_entry_removed_ptr = entry; - if (entry == cache->entry_watched_for_removal) - cache->entry_watched_for_removal = NULL; + /* Increment entries_removed_counter and set last_entry_removed_ptr. + * As we me be about to free the entry, recall that last_entry_removed_ptr + * must NEVER be dereferenced. + * + * Recall that these fields are maintained to allow functions that perform + * scans of lists of entries to detect the unexpected removal of entries + * (via expunge, eviction, or take ownership at present), so that they can + * re-start their scans if necessary. + * + * Also check if the entry we are watching for removal is being + * removed (usually the 'next' entry for an iteration) and reset + * it to indicate that it was removed. + */ + cache->entries_removed_counter++; + cache->last_entry_removed_ptr = entry; + if (entry == cache->entry_watched_for_removal) + cache->entry_watched_for_removal = NULL; - /* Internal cache data structures should now be up to date, and - * consistent with the status of the entry. - * - * Now clean up internal cache fields if appropriate. - */ + /* Internal cache data structures should now be up to date, and + * consistent with the status of the entry. + * + * Now clean up internal cache fields if appropriate. + */ - /* Free the buffer for the on disk image */ - if (entry->image_ptr != NULL) - entry->image_ptr = H5MM_xfree(entry->image_ptr); + /* Free the buffer for the on disk image */ + if (entry->image_ptr != NULL) + entry->image_ptr = H5MM_xfree(entry->image_ptr); - /* Reset the pointer to the cache the entry is within */ - entry->cache_ptr = NULL; + /* Reset the pointer to the cache the entry is within */ + entry->cache_ptr = NULL; - /* Client is taking ownership of the entry. Set bad magic here so the - * cache will choke unless the entry is re-inserted properly - */ - entry->magic = H5C__H5C_CACHE_ENTRY_T_BAD_MAGIC; + /* Client is taking ownership of the entry. Set bad magic here so the + * cache will choke unless the entry is re-inserted properly + */ + entry->magic = H5C__H5C_CACHE_ENTRY_T_BAD_MAGIC; done: - FUNC_LEAVE_NOAPI(ret_value) - } /* H5C__remove_entry() */ + FUNC_LEAVE_NOAPI(ret_value) +} /* H5C__remove_entry() */ |