diff options
Diffstat (limited to 'src/H5FSsection.c')
| -rw-r--r-- | src/H5FSsection.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/src/H5FSsection.c b/src/H5FSsection.c index 581d3dc..fa24f85 100644 --- a/src/H5FSsection.c +++ b/src/H5FSsection.c @@ -2377,3 +2377,114 @@ HDfprintf(stderr, "%s: sect->size = %Hu, sect->addr = %a, sect->type = %u\n", "H } /* end H5FS_sect_assert() */ #endif /* H5FS_DEBUG_ASSERT */ + +/*------------------------------------------------------------------------- + * Function: H5FS_sect_try_shrink_eoa + * + * Purpose: To shrink the last section on the merge list if the section + * is at EOF. + * + * Return: Success: non-negative (TRUE/FALSE) + * Failure: negative + * + * Programmer: Vailin Choi + * + *------------------------------------------------------------------------- + */ +htri_t +H5FS_sect_try_shrink_eoa(const H5F_t *f, hid_t dxpl_id, const H5FS_t *fspace, void *op_data) +{ + hbool_t sinfo_valid = FALSE; /* Whether the section info is valid */ + hbool_t section_removed = FALSE; /* Whether a section was removed */ + htri_t ret_value = FALSE; /* Return value */ + + FUNC_ENTER_NOAPI(FAIL) + + /* Check arguments. */ + HDassert(fspace); + + if(H5FS_sinfo_lock(f, dxpl_id, fspace, H5AC_WRITE) < 0) + HGOTO_ERROR(H5E_FSPACE, H5E_CANTGET, FAIL, "can't get section info") + sinfo_valid = TRUE; + + if(fspace->sinfo && fspace->sinfo->merge_list) { + H5SL_node_t *last_node; /* Last node in merge list */ + + /* Check for last node in the merge list */ + if(NULL != (last_node = H5SL_last(fspace->sinfo->merge_list))) { + H5FS_section_info_t *tmp_sect; /* Temporary free space section */ + H5FS_section_class_t *tmp_sect_cls; /* Temporary section's class */ + + /* Get the pointer to the last section, from the last node */ + tmp_sect = (H5FS_section_info_t *)H5SL_item(last_node); + HDassert(tmp_sect); + tmp_sect_cls = &fspace->sect_cls[tmp_sect->type]; + if(tmp_sect_cls->can_shrink) { + /* Check if the section can be shrunk away */ + if((ret_value = (*tmp_sect_cls->can_shrink)(tmp_sect, op_data)) < 0) + HGOTO_ERROR(H5E_FSPACE, H5E_CANTSHRINK, FAIL, "can't check for shrinking container") + if(ret_value > 0) { + HDassert(tmp_sect_cls->shrink); + + /* Remove section from free space manager */ + if(H5FS_sect_remove_real(fspace, tmp_sect) < 0) + HGOTO_ERROR(H5E_FSPACE, H5E_CANTRELEASE, FAIL, "can't remove section from internal data structures") + section_removed = TRUE; + + /* Shrink away section */ + if((*tmp_sect_cls->shrink)(&tmp_sect, op_data) < 0) + HGOTO_ERROR(H5E_FSPACE, H5E_CANTINSERT, FAIL, "can't shrink free space container") + } /* end if */ + } /* end if */ + } /* end if */ + } /* end if */ + +done: + /* Release the section info */ + if(sinfo_valid && H5FS_sinfo_unlock(f, dxpl_id, fspace, section_removed) < 0) + HDONE_ERROR(H5E_FSPACE, H5E_CANTRELEASE, FAIL, "can't release section info") + + FUNC_LEAVE_NOAPI(ret_value) +} /* H5FS_sect_try_shrink_eoa() */ + + +/*------------------------------------------------------------------------- + * Function: H5FS_sect_query_last_sect + * + * Purpose: Retrieve info about the last section on the merge list + * + * Return: Success: non-negative + * Failure: negative + * + * Programmer: Vailin Choi + * + *------------------------------------------------------------------------- + */ +herr_t +H5FS_sect_query_last_sect(const H5FS_t *fspace, haddr_t *sect_addr, hsize_t *sect_size) +{ + FUNC_ENTER_NOAPI_NOINIT_NOERR + + /* Check arguments. */ + HDassert(fspace); + + if(fspace->sinfo && fspace->sinfo->merge_list) { + H5SL_node_t *last_node; /* Last node in merge list */ + + /* Check for last node in the merge list */ + if(NULL != (last_node = H5SL_last(fspace->sinfo->merge_list))) { + H5FS_section_info_t *tmp_sect; /* Temporary free space section */ + + /* Get the pointer to the last section, from the last node */ + tmp_sect = (H5FS_section_info_t *)H5SL_item(last_node); + HDassert(tmp_sect); + if(sect_addr) + *sect_addr = tmp_sect->addr; + if(sect_size) + *sect_size = tmp_sect->size; + } /* end if */ + } /* end if */ + + FUNC_LEAVE_NOAPI(SUCCEED) +} /* H5FS_sect_query_last_sect() */ + |