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author | Quincey Koziol <koziol@hdfgroup.org> | 2002-06-10 15:48:25 (GMT) |
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committer | Quincey Koziol <koziol@hdfgroup.org> | 2002-06-10 15:48:25 (GMT) |
commit | f988c8414cac36fbf73e9ffc000561bc39993165 (patch) | |
tree | e66993cf9fd2f5afdc77ae2e30f7644125137a92 /src/H5P.c | |
parent | 7a8c53eb8501310edc86c5dbe52a29a99bfaea20 (diff) | |
download | hdf5-f988c8414cac36fbf73e9ffc000561bc39993165.zip hdf5-f988c8414cac36fbf73e9ffc000561bc39993165.tar.gz hdf5-f988c8414cac36fbf73e9ffc000561bc39993165.tar.bz2 |
[svn-r5564] Purpose:
New Feature
Description:
Add H5P[set|get]_small_data_block_size API function, per our discussions at
last week's HDF5 meeting.
Platforms tested:
FreeBSD 4.5 (sleipnir)
Diffstat (limited to 'src/H5P.c')
-rw-r--r-- | src/H5P.c | 85 |
1 files changed, 83 insertions, 2 deletions
@@ -3778,8 +3778,6 @@ H5Pget_vlen_mem_manager(hid_t plist_id, H5MM_allocate_t *alloc_func/*out*/, * Friday, August 25, 2000 * * Modifications: - * Quincey Koziol, June 5, 2002 - * Also sets the "small data" aggregation size * *------------------------------------------------------------------------- */ @@ -3927,6 +3925,89 @@ H5Pget_sieve_buf_size(hid_t fapl_id, hsize_t *size/*out*/) } /* end H5Pget_sieve_buf_size() */ +/*------------------------------------------------------------------------- + * Function: H5Pset_small_data_block_size + * + * Purpose: Sets the minimum size of "small" raw data block allocations + * when the H5FD_FEAT_AGGREGATE_SMALLDATA is set by a VFL driver. + * Each "small" raw data block is allocated to be this size and then + * specific pieces of raw data are sub-allocated from this block. + * + * The default value is set to 2048 (bytes), indicating that + * "small" raw data 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 "small" raw data aggregation, even if the VFL driver + * attempts to use that strategy. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Quincey Koziol + * Monday, June 10, 2002 + * + * Modifications: + * + *------------------------------------------------------------------------- + */ +herr_t +H5Pset_small_data_block_size(hid_t fapl_id, hsize_t size) +{ + H5F_access_t *fapl = NULL; + + FUNC_ENTER (H5Pset_small_data_block_size, FAIL); + H5TRACE2("e","ih",fapl_id,size); + + /* 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->sdata_block_size = size; + + FUNC_LEAVE (SUCCEED); +} + + +/*------------------------------------------------------------------------- + * Function: H5Pget_small_data_block_size + * + * Purpose: Returns the current settings for the "small" raw data block + * allocation property from a file access property list. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Quincey Koziol + * Monday, June 10, 2002 + * + * Modifications: + * + *------------------------------------------------------------------------- + */ +herr_t +H5Pget_small_data_block_size(hid_t fapl_id, hsize_t *size/*out*/) +{ + H5F_access_t *fapl = NULL; + + FUNC_ENTER (H5Pget_small_data_block_size, FAIL); + H5TRACE2("e","ix",fapl_id,size); + + /* 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->sdata_block_size; + + FUNC_LEAVE (SUCCEED); +} + + /*-------------------------------------------------------------------------- NAME H5P_copy_prop |