diff options
Diffstat (limited to 'src/H5Cprivate.h')
| -rw-r--r-- | src/H5Cprivate.h | 41 |
1 files changed, 35 insertions, 6 deletions
diff --git a/src/H5Cprivate.h b/src/H5Cprivate.h index 6f96838..9dc9db3 100644 --- a/src/H5Cprivate.h +++ b/src/H5Cprivate.h @@ -137,8 +137,7 @@ typedef enum H5C_notify_action_t { typedef void *(*H5C_load_func_t)(H5F_t *f, hid_t dxpl_id, haddr_t addr, - const void *udata1, - void *udata2); + void *udata); typedef herr_t (*H5C_flush_func_t)(H5F_t *f, hid_t dxpl_id, hbool_t dest, @@ -505,6 +504,37 @@ typedef herr_t (*H5C_log_flush_func_t)(H5C_t * cache_ptr, * there is no previous item, it should be NULL. * * + * Fields supporting metadata journaling: + * + * last_trans: unit64_t containing the ID of the last transaction in + * which this entry was dirtied. If journaling is disabled, + * or if the entry has never been dirtied in a transaction, + * this field should be set to zero. Once we notice that + * the specified transaction has made it to disk, we will + * reset this field to zero as well. + * + * We must maintain this field, as to avoid messages from + * the future, we must not flush a dirty entry to disk + * until the last transaction in which it was dirtied + * has made it to disk in the journal file. + * + * trans_next: Next pointer in the entries modified in the current + * transaction list. This field should always be null + * unless journaling is enabled, the entry is dirty, + * and last_trans field contains the current transaction + * number. Even if all these conditions are fulfilled, + * the field will still be NULL if this is the last + * entry on the list. + * + * trans_prev: Previous pointer in the entries modified in the current + * transaction list. This field should always be null + * unless journaling is enabled, the entry is dirty, + * and last_trans field contains the current transaction + * number. Even if all these conditions are fulfilled, + * the field will still be NULL if this is the first + * entry on the list. + * + * * Cache entry stats collection fields: * * These fields should only be compiled in when both H5C_COLLECT_CACHE_STATS @@ -1104,11 +1134,10 @@ H5_DLL herr_t H5C_create_flush_dependency(void *parent_thing, void *child_thing) H5_DLL void * H5C_protect(H5F_t * f, hid_t primary_dxpl_id, hid_t secondary_dxpl_id, - const H5C_class_t * type, + const H5C_class_t * type, haddr_t addr, - const void * udata1, - void * udata2, - unsigned flags); + void * udata, + unsigned flags); H5_DLL herr_t H5C_reset_cache_hit_rate_stats(H5C_t * cache_ptr); |