mirror/hdf5
2
0
Fork 0
mirror of https://github.com/HDFGroup/hdf5.git synced 2024-12-09 07:32:32 +08:00
Code Issues Packages Projects Releases Wiki Activity

[svn-r2493] Added a set/get pair of property modifiers to allows users to set/query the

Browse Source 
metadata allocation size for file access property lists.  These are new API
functions and should be documented for the next release.
This commit is contained in:
Quincey Koziol 2000-08-31 14:24:36 -05:00
parent d2b293884e
commit 7e7b6854e6
2 changed files with 84 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

82
src/H5P.c
View File

@ -2906,6 +2906,88 @@ H5Pget_vlen_mem_manager(hid_t plist_id, H5MM_allocate_t *alloc_func/*out*/,
FUNC_LEAVE (SUCCEED);
}
/*-------------------------------------------------------------------------
* Function: H5Pset_meta_block_size
*
* Purpose: Sets the minimum size of metadata block allocations when
* the H5FD_FEAT_AGGREGATE_METADATA is set by a VFL driver.
* Each "raw" metadata block is allocated to be this size and then
* specific pieces of metadata (object headers, local heaps, B-trees, etc)
* are sub-allocated from this block.
*
* The default value is set to 2048 (bytes), indicating that metadata
* will be attempted to be bunched together in (at least) 2K blocks in
* the file. Setting the value to 0 with this API function will
* turn off the metadata aggregation, even if the VFL driver attempts to
* use that strategy.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* Friday, August 25, 2000
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pset_meta_block_size(hid_t fapl_id, hsize_t size)
{
H5F_access_t *fapl = NULL;
FUNC_ENTER (H5Pset_meta_block_size, FAIL);
/* Check args */
if (H5P_FILE_ACCESS != H5P_get_class (fapl_id) ||
NULL == (fapl = H5I_object (fapl_id))) {
HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL,
"not a file access property list");
}
/* Set values */
fapl->meta_block_size = size;
FUNC_LEAVE (SUCCEED);
}
/*-------------------------------------------------------------------------
* Function: H5Pget_meta_block_size
*
* Purpose: Returns the current settings for the metadata block allocation
* property from a file access property list.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Quincey Koziol
* Friday, August 29, 2000
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pget_meta_block_size(hid_t fapl_id, hsize_t *size/*out*/)
{
H5F_access_t *fapl = NULL;
FUNC_ENTER (H5Pget_meta_block_size, FAIL);
/* Check args */
if (H5P_FILE_ACCESS != H5P_get_class (fapl_id) ||
NULL == (fapl = H5I_object (fapl_id))) {
HRETURN_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL,
"not a file access property list");
}
/* Get values */
if (size)
*size = fapl->meta_block_size;
FUNC_LEAVE (SUCCEED);
}
/*--------------------------------------------------------------------------
NAME

2
src/H5Ppublic.h
View File

@ -179,6 +179,8 @@ __DLL__ herr_t H5Pget_vlen_mem_manager(hid_t plist_id,
void **alloc_info,
H5MM_free_t *free_func,
void **free_info);
__DLL__ herr_t H5Pset_meta_block_size(hid_t fapl_id, hsize_t size);
__DLL__ herr_t H5Pget_meta_block_size(hid_t fapl_id, hsize_t *size/*out*/);
#ifdef __cplusplus
}