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hdf5/src/H5Pdapl.c
Larry Knox 89fbe00dec Merge pull request #426 in HDFFV/hdf5 from ~LRKNOX/hdf5_lrk:hdf5_1_10 to hdf5_1_10 
* commit '54957d37f5aa73912763dbb6e308555e863c43f4':
  Commit copyright header change for src/H5PLpkg.c which was added after running script to make changes.
  Add new files in release_docs to MANIFEST. Cimmit changes to Makefile.in(s) and H5PL.c that resulted from running autogen.sh.
  Merge pull request #407 in HDFFV/hdf5 from ~LRKNOX/hdf5_lrk:hdf5_1_10_1 to hdf5_1_10_1
  Change copyright headers to replace url referring to file to be removed and replace it with new url for COPYING file.
2017-04-25 16:05:36 -05:00

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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
*
* Created: H5Pdapl.c
* October 27, 2008
* Neil Fortner <nfortne2@hdfgroup.org>
*
* Purpose: Dataset access property list class routines
*
*-------------------------------------------------------------------------
*/
/****************/
/* Module Setup */
/****************/
#include "H5Pmodule.h" /* This source code file is part of the H5P module */
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Dprivate.h" /* Datasets */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fprivate.h" /* Files */
#include "H5Iprivate.h" /* IDs */
#include "H5Ppkg.h" /* Property lists */
#include "H5MMprivate.h" /* Memory management */
/****************/
/* Local Macros */
/****************/
/* ========= Dataset Access properties ============ */
/* Definitions for size of raw data chunk cache(slots) */
#define H5D_ACS_DATA_CACHE_NUM_SLOTS_SIZE sizeof(size_t)
#define H5D_ACS_DATA_CACHE_NUM_SLOTS_DEF H5D_CHUNK_CACHE_NSLOTS_DEFAULT
#define H5D_ACS_DATA_CACHE_NUM_SLOTS_ENC H5P__encode_chunk_cache_nslots
#define H5D_ACS_DATA_CACHE_NUM_SLOTS_DEC H5P__decode_chunk_cache_nslots
/* Definition for size of raw data chunk cache(bytes) */
#define H5D_ACS_DATA_CACHE_BYTE_SIZE_SIZE sizeof(size_t)
#define H5D_ACS_DATA_CACHE_BYTE_SIZE_DEF H5D_CHUNK_CACHE_NBYTES_DEFAULT
#define H5D_ACS_DATA_CACHE_BYTE_SIZE_ENC H5P__encode_chunk_cache_nbytes
#define H5D_ACS_DATA_CACHE_BYTE_SIZE_DEC H5P__decode_chunk_cache_nbytes
/* Definition for preemption read chunks first */
#define H5D_ACS_PREEMPT_READ_CHUNKS_SIZE sizeof(double)
#define H5D_ACS_PREEMPT_READ_CHUNKS_DEF H5D_CHUNK_CACHE_W0_DEFAULT
#define H5D_ACS_PREEMPT_READ_CHUNKS_ENC H5P__encode_double
#define H5D_ACS_PREEMPT_READ_CHUNKS_DEC H5P__decode_double
/* Definitions for VDS view option */
#define H5D_ACS_VDS_VIEW_SIZE sizeof(H5D_vds_view_t)
#define H5D_ACS_VDS_VIEW_DEF H5D_VDS_LAST_AVAILABLE
#define H5D_ACS_VDS_VIEW_ENC H5P__dacc_vds_view_enc
#define H5D_ACS_VDS_VIEW_DEC H5P__dacc_vds_view_dec
/* Definitions for VDS printf gap */
#define H5D_ACS_VDS_PRINTF_GAP_SIZE sizeof(hsize_t)
#define H5D_ACS_VDS_PRINTF_GAP_DEF (hsize_t)0
#define H5D_ACS_VDS_PRINTF_GAP_ENC H5P__encode_hsize_t
#define H5D_ACS_VDS_PRINTF_GAP_DEC H5P__decode_hsize_t
/* Definition for append flush */
#define H5D_ACS_APPEND_FLUSH_SIZE sizeof(H5D_append_flush_t)
#define H5D_ACS_APPEND_FLUSH_DEF {0,{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},NULL,NULL}
/* Definitions for external file prefix */
#define H5D_ACS_EFILE_PREFIX_SIZE sizeof(char *)
#define H5D_ACS_EFILE_PREFIX_DEF NULL /*default is no prefix */
#define H5D_ACS_EFILE_PREFIX_SET H5P__dapl_efile_pref_set
#define H5D_ACS_EFILE_PREFIX_GET H5P__dapl_efile_pref_get
#define H5D_ACS_EFILE_PREFIX_ENC H5P__dapl_efile_pref_enc
#define H5D_ACS_EFILE_PREFIX_DEC H5P__dapl_efile_pref_dec
#define H5D_ACS_EFILE_PREFIX_DEL H5P__dapl_efile_pref_del
#define H5D_ACS_EFILE_PREFIX_COPY H5P__dapl_efile_pref_copy
#define H5D_ACS_EFILE_PREFIX_CMP H5P__dapl_efile_pref_cmp
#define H5D_ACS_EFILE_PREFIX_CLOSE H5P__dapl_efile_pref_close
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Package Typedefs */
/********************/
/********************/
/* Local Prototypes */
/********************/
/* Property class callbacks */
static herr_t H5P__dacc_reg_prop(H5P_genclass_t *pclass);
static herr_t H5P__encode_chunk_cache_nslots(const void *value, void **_pp,
size_t *size);
static herr_t H5P__decode_chunk_cache_nslots(const void **_pp, void *_value);
static herr_t H5P__encode_chunk_cache_nbytes(const void *value, void **_pp,
size_t *size);
static herr_t H5P__decode_chunk_cache_nbytes(const void **_pp, void *_value);
/* Property list callbacks */
static herr_t H5P__dacc_vds_view_enc(const void *value, void **pp, size_t *size);
static herr_t H5P__dacc_vds_view_dec(const void **pp, void *value);
/* Property list callbacks */
static herr_t H5P__dapl_efile_pref_set(hid_t prop_id, const char* name, size_t size, void* value);
static herr_t H5P__dapl_efile_pref_get(hid_t prop_id, const char* name, size_t size, void* value);
static herr_t H5P__dapl_efile_pref_enc(const void *value, void **_pp, size_t *size);
static herr_t H5P__dapl_efile_pref_dec(const void **_pp, void *value);
static herr_t H5P__dapl_efile_pref_del(hid_t prop_id, const char* name, size_t size, void* value);
static herr_t H5P__dapl_efile_pref_copy(const char* name, size_t size, void* value);
static int H5P__dapl_efile_pref_cmp(const void *value1, const void *value2, size_t size);
static herr_t H5P__dapl_efile_pref_close(const char* name, size_t size, void* value);
/*********************/
/* Package Variables */
/*********************/
/* Dataset access property list class library initialization object */
const H5P_libclass_t H5P_CLS_DACC[1] = {{
"dataset access", /* Class name for debugging */
H5P_TYPE_DATASET_ACCESS, /* Class type */
&H5P_CLS_LINK_ACCESS_g, /* Parent class */
&H5P_CLS_DATASET_ACCESS_g, /* Pointer to class */
&H5P_CLS_DATASET_ACCESS_ID_g, /* Pointer to class ID */
&H5P_LST_DATASET_ACCESS_ID_g, /* Pointer to default property list ID */
H5P__dacc_reg_prop, /* Default property registration routine */
NULL, /* Class creation callback */
NULL, /* Class creation callback info */
NULL, /* Class copy callback */
NULL, /* Class copy callback info */
NULL, /* Class close callback */
NULL /* Class close callback info */
}};
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/* Property value defaults */
static const H5D_append_flush_t H5D_def_append_flush_g = H5D_ACS_APPEND_FLUSH_DEF; /* Default setting for append flush */
static const char *H5D_def_efile_prefix_g = H5D_ACS_EFILE_PREFIX_DEF; /* Default external file prefix string */
/*-------------------------------------------------------------------------
* Function: H5P__dacc_reg_prop
*
* Purpose: Register the dataset access property list class's
* properties
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Neil Fortner
* October 27, 2008
*-------------------------------------------------------------------------
*/
static herr_t
H5P__dacc_reg_prop(H5P_genclass_t *pclass)
{
size_t rdcc_nslots = H5D_ACS_DATA_CACHE_NUM_SLOTS_DEF; /* Default raw data chunk cache # of slots */
size_t rdcc_nbytes = H5D_ACS_DATA_CACHE_BYTE_SIZE_DEF; /* Default raw data chunk cache # of bytes */
double rdcc_w0 = H5D_ACS_PREEMPT_READ_CHUNKS_DEF; /* Default raw data chunk cache dirty ratio */
H5D_vds_view_t virtual_view = H5D_ACS_VDS_VIEW_DEF; /* Default VDS view option */
hsize_t printf_gap = H5D_ACS_VDS_PRINTF_GAP_DEF; /* Default VDS printf gap */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_STATIC
/* Register the size of raw data chunk cache (elements) */
if(H5P_register_real(pclass, H5D_ACS_DATA_CACHE_NUM_SLOTS_NAME, H5D_ACS_DATA_CACHE_NUM_SLOTS_SIZE, &rdcc_nslots,
NULL, NULL, NULL, H5D_ACS_DATA_CACHE_NUM_SLOTS_ENC, H5D_ACS_DATA_CACHE_NUM_SLOTS_DEC, NULL, NULL, NULL, NULL) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
/* Register the size of raw data chunk cache(bytes) */
if(H5P_register_real(pclass, H5D_ACS_DATA_CACHE_BYTE_SIZE_NAME, H5D_ACS_DATA_CACHE_BYTE_SIZE_SIZE, &rdcc_nbytes,
NULL, NULL, NULL, H5D_ACS_DATA_CACHE_BYTE_SIZE_ENC, H5D_ACS_DATA_CACHE_BYTE_SIZE_DEC, NULL, NULL, NULL, NULL) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
/* Register the preemption for reading chunks */
if(H5P_register_real(pclass, H5D_ACS_PREEMPT_READ_CHUNKS_NAME, H5D_ACS_PREEMPT_READ_CHUNKS_SIZE, &rdcc_w0,
NULL, NULL, NULL, H5D_ACS_PREEMPT_READ_CHUNKS_ENC, H5D_ACS_PREEMPT_READ_CHUNKS_DEC, NULL, NULL, NULL, NULL) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
/* Register the VDS view option */
if(H5P_register_real(pclass, H5D_ACS_VDS_VIEW_NAME, H5D_ACS_VDS_VIEW_SIZE, &virtual_view,
NULL, NULL, NULL, H5D_ACS_VDS_VIEW_ENC, H5D_ACS_VDS_VIEW_DEC,
NULL, NULL, NULL, NULL) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
/* Register the VDS printf gap */
if(H5P_register_real(pclass, H5D_ACS_VDS_PRINTF_GAP_NAME, H5D_ACS_VDS_PRINTF_GAP_SIZE, &printf_gap,
NULL, NULL, NULL, H5D_ACS_VDS_PRINTF_GAP_ENC, H5D_ACS_VDS_PRINTF_GAP_DEC,
NULL, NULL, NULL, NULL) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
/* Register info for append flush */
/* (Note: this property should not have an encode/decode callback -QAK) */
if(H5P_register_real(pclass, H5D_ACS_APPEND_FLUSH_NAME, H5D_ACS_APPEND_FLUSH_SIZE, &H5D_def_append_flush_g,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
/* Register property for external file prefix */
if(H5P_register_real(pclass, H5D_ACS_EFILE_PREFIX_NAME, H5D_ACS_EFILE_PREFIX_SIZE, &H5D_def_efile_prefix_g,
NULL, H5D_ACS_EFILE_PREFIX_SET, H5D_ACS_EFILE_PREFIX_GET, H5D_ACS_EFILE_PREFIX_ENC, H5D_ACS_EFILE_PREFIX_DEC,
H5D_ACS_EFILE_PREFIX_DEL, H5D_ACS_EFILE_PREFIX_COPY, H5D_ACS_EFILE_PREFIX_CMP, H5D_ACS_EFILE_PREFIX_CLOSE) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5P__dacc_reg_prop() */
/*-------------------------------------------------------------------------
* Function: H5P__dapl_efile_pref_set
*
* Purpose: Copies an external file prefix property when it's set
* for a property list
*
* Return: SUCCEED/FAIL
*
*-------------------------------------------------------------------------
*/
static herr_t
H5P__dapl_efile_pref_set(hid_t H5_ATTR_UNUSED prop_id, const char H5_ATTR_UNUSED *name,
size_t H5_ATTR_UNUSED size, void *value)
{
FUNC_ENTER_STATIC_NOERR
/* Sanity check */
HDassert(value);
/* Copy the prefix */
*(char **)value = H5MM_xstrdup(*(const char **)value);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5P__dapl_efile_pref_set() */
/*-------------------------------------------------------------------------
* Function: H5P__dapl_efile_pref_get
*
* Purpose: Copies an external file prefix property when it's retrieved
* from a property list
*
* Return: SUCCEED/FAIL
*
*-------------------------------------------------------------------------
*/
static herr_t
H5P__dapl_efile_pref_get(hid_t H5_ATTR_UNUSED prop_id, const char H5_ATTR_UNUSED *name,
size_t H5_ATTR_UNUSED size, void *value)
{
FUNC_ENTER_STATIC_NOERR
/* Sanity check */
HDassert(value);
/* Copy the prefix */
*(char **)value = H5MM_xstrdup(*(const char **)value);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5P__dapl_efile_pref_get() */
/*-------------------------------------------------------------------------
* Function: H5P__dapl_efile_pref_enc
*
* Purpose: Callback routine which is called whenever the efile flags
* property in the dataset access property list is
* encoded.
*
* Return: SUCCEED/FAIL
*
*-------------------------------------------------------------------------
*/
static herr_t
H5P__dapl_efile_pref_enc(const void *value, void **_pp, size_t *size)
{
const char *efile_pref = *(const char * const *)value;
uint8_t **pp = (uint8_t **)_pp;
size_t len = 0;
uint64_t enc_value;
unsigned enc_size;
FUNC_ENTER_NOAPI_NOINIT_NOERR
HDcompile_assert(sizeof(size_t) <= sizeof(uint64_t));
/* calculate prefix length */
if(NULL != efile_pref)
len = HDstrlen(efile_pref);
enc_value = (uint64_t)len;
enc_size = H5VM_limit_enc_size(enc_value);
HDassert(enc_size < 256);
if(NULL != *pp) {
/* encode the length of the prefix */
*(*pp)++ = (uint8_t)enc_size;
UINT64ENCODE_VAR(*pp, enc_value, enc_size);
/* encode the prefix */
if(NULL != efile_pref) {
HDmemcpy(*(char **)pp, efile_pref, len);
*pp += len;
} /* end if */
} /* end if */
*size += (1 + enc_size);
if(NULL != efile_pref)
*size += len;
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5P__dapl_efile_pref_enc() */
/*-------------------------------------------------------------------------
* Function: H5P__dapl_efile_pref_dec
*
* Purpose: Callback routine which is called whenever the efile prefix
* property in the dataset access property list is
* decoded.
*
* Return: SUCCEED/FAIL
*
*-------------------------------------------------------------------------
*/
static herr_t
H5P__dapl_efile_pref_dec(const void **_pp, void *_value)
{
char **efile_pref = (char **)_value;
const uint8_t **pp = (const uint8_t **)_pp;
size_t len;
uint64_t enc_value; /* Decoded property value */
unsigned enc_size; /* Size of encoded property */
herr_t ret_value = SUCCEED;
FUNC_ENTER_NOAPI_NOINIT
HDassert(pp);
HDassert(*pp);
HDassert(efile_pref);
HDcompile_assert(sizeof(size_t) <= sizeof(uint64_t));
/* Decode the size */
enc_size = *(*pp)++;
HDassert(enc_size < 256);
/* Decode the value */
UINT64DECODE_VAR(*pp, enc_value, enc_size);
len = (size_t)enc_value;
if(0 != len) {
/* Make a copy of the user's prefix string */
if(NULL == (*efile_pref = (char *)H5MM_malloc(len + 1)))
HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "memory allocation failed for prefix")
HDstrncpy(*efile_pref, *(const char **)pp, len);
(*efile_pref)[len] = '\0';
*pp += len;
} /* end if */
else
*efile_pref = NULL;
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5P__dapl_efile_pref_dec() */
/*-------------------------------------------------------------------------
* Function: H5P__dapl_efile_pref_del
*
* Purpose: Frees memory used to store the external file prefix string
*
* Return: SUCCEED (Can't fail)
*
*-------------------------------------------------------------------------
*/
static herr_t
H5P__dapl_efile_pref_del(hid_t H5_ATTR_UNUSED prop_id, const char H5_ATTR_UNUSED *name,
size_t H5_ATTR_UNUSED size, void *value)
{
FUNC_ENTER_NOAPI_NOINIT_NOERR
HDassert(value);
H5MM_xfree(*(void **)value);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5P__dapl_efile_pref_del() */
/*-------------------------------------------------------------------------
* Function: H5P__dapl_efile_pref_copy
*
* Purpose: Creates a copy of the external file prefix string
*
* Return: SUCCEED/FAIL
*
*-------------------------------------------------------------------------
*/
static herr_t
H5P__dapl_efile_pref_copy(const char H5_ATTR_UNUSED *name, size_t H5_ATTR_UNUSED size, void *value)
{
FUNC_ENTER_NOAPI_NOINIT_NOERR
HDassert(value);
*(char **)value = H5MM_xstrdup(*(const char **)value);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5P__dapl_efile_pref_copy() */
/*-------------------------------------------------------------------------
* Function: H5P__dapl_efile_pref_cmp
*
* Purpose: Callback routine which is called whenever the efile prefix
* property in the dataset creation property list is
* compared.
*
* Return: zero if VALUE1 and VALUE2 are equal, non zero otherwise.
*
*-------------------------------------------------------------------------
*/
static int
H5P__dapl_efile_pref_cmp(const void *value1, const void *value2, size_t H5_ATTR_UNUSED size)
{
const char *pref1 = *(const char * const *)value1;
const char *pref2 = *(const char * const *)value2;
int ret_value = 0;
FUNC_ENTER_NOAPI_NOINIT_NOERR
if(NULL == pref1 && NULL != pref2)
HGOTO_DONE(1);
if(NULL != pref1 && NULL == pref2)
HGOTO_DONE(-1);
if(NULL != pref1 && NULL != pref2)
ret_value = HDstrcmp(pref1, pref2);
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5P__dapl_efile_pref_cmp() */
/*-------------------------------------------------------------------------
* Function: H5P__dapl_efile_pref_close
*
* Purpose: Frees memory used to store the external file prefix string
*
* Return: SUCCEED/FAIL
*
*-------------------------------------------------------------------------
*/
static herr_t
H5P__dapl_efile_pref_close(const char H5_ATTR_UNUSED *name, size_t H5_ATTR_UNUSED size, void *value)
{
FUNC_ENTER_NOAPI_NOINIT_NOERR
HDassert(value);
H5MM_xfree(*(void **)value);
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5P__dapl_efile_pref_close() */
/*-------------------------------------------------------------------------
* Function: H5Pset_chunk_cache
*
* Purpose: Set the number of objects in the meta data cache and the
* maximum number of chunks and bytes in the raw data chunk cache.
* Once set, these values will override the values in the file access
* property list. Each of thhese values can be individually unset
* (or not set at all) by passing the macros:
* H5D_CHUNK_CACHE_NCHUNKS_DEFAULT,
* H5D_CHUNK_CACHE_NSLOTS_DEFAULT, and/or
* H5D_CHUNK_CACHE_W0_DEFAULT
* as appropriate.
*
* The RDCC_W0 value should be between 0 and 1 inclusive and
* indicates how much chunks that have been fully read or fully
* written are favored for preemption. A value of zero means
* fully read or written chunks are treated no differently than
* other chunks (the preemption is strictly LRU) while a value
* of one means fully read chunks are always preempted before
* other chunks.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Neil Fortner
* Monday, October 27, 2008
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pset_chunk_cache(hid_t dapl_id, size_t rdcc_nslots, size_t rdcc_nbytes, double rdcc_w0)
{
H5P_genplist_t *plist; /* Property list pointer */
herr_t ret_value = SUCCEED; /* return value */
FUNC_ENTER_API(FAIL)
H5TRACE4("e", "izzd", dapl_id, rdcc_nslots, rdcc_nbytes, rdcc_w0);
/* Check arguments. Note that we allow negative values - they are
* considered to "unset" the property. */
if(rdcc_w0 > (double)1.0f)
HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "raw data cache w0 value must be between 0.0 and 1.0 inclusive, or H5D_CHUNK_CACHE_W0_DEFAULT");
/* Get the plist structure */
if(NULL == (plist = H5P_object_verify(dapl_id,H5P_DATASET_ACCESS)))
HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID");
/* Set sizes */
if(H5P_set(plist, H5D_ACS_DATA_CACHE_NUM_SLOTS_NAME, &rdcc_nslots) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET,FAIL, "can't set data cache number of chunks");
if(H5P_set(plist, H5D_ACS_DATA_CACHE_BYTE_SIZE_NAME, &rdcc_nbytes) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET,FAIL, "can't set data cache byte size");
if(H5P_set(plist, H5D_ACS_PREEMPT_READ_CHUNKS_NAME, &rdcc_w0) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET,FAIL, "can't set preempt read chunks");
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Pset_chunk_cache() */
/*-------------------------------------------------------------------------
* Function: H5Pget_chunk_cache
*
* Purpose: Retrieves the maximum possible number of elements in the meta
* data cache and the maximum possible number of elements and
* bytes and the RDCC_W0 value in the raw data chunk cache. Any
* (or all) arguments may be null pointers in which case the
* corresponding datum is not returned. If these properties have
* not been set on this property list, the default values for a
* file access property list are returned.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Neil Fortner
* Monday, October 27, 2008
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pget_chunk_cache(hid_t dapl_id, size_t *rdcc_nslots, size_t *rdcc_nbytes, double *rdcc_w0)
{
H5P_genplist_t *plist; /* Property list pointer */
H5P_genplist_t *def_plist; /* Default file access property list */
herr_t ret_value = SUCCEED; /* return value */
FUNC_ENTER_API(FAIL)
H5TRACE4("e", "i*z*z*d", dapl_id, rdcc_nslots, rdcc_nbytes, rdcc_w0);
/* Get the plist structure */
if (NULL == (plist = H5P_object_verify(dapl_id, H5P_DATASET_ACCESS)))
HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID");
/* Get default file access plist */
if (NULL == (def_plist = (H5P_genplist_t *)H5I_object(H5P_FILE_ACCESS_DEFAULT)))
HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for default fapl ID");
/* Get the properties. If a property is set to the default value, the value
* from the default fapl is used. */
if (rdcc_nslots) {
if (H5P_get(plist, H5D_ACS_DATA_CACHE_NUM_SLOTS_NAME, rdcc_nslots) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET,FAIL, "can't get data cache number of slots");
if (*rdcc_nslots == H5D_CHUNK_CACHE_NSLOTS_DEFAULT)
if (H5P_get(def_plist, H5F_ACS_DATA_CACHE_NUM_SLOTS_NAME, rdcc_nslots) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET,FAIL, "can't get default data cache number of slots");
} /* end if */
if (rdcc_nbytes) {
if (H5P_get(plist, H5D_ACS_DATA_CACHE_BYTE_SIZE_NAME, rdcc_nbytes) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET,FAIL, "can't get data cache byte size");
if (*rdcc_nbytes == H5D_CHUNK_CACHE_NBYTES_DEFAULT)
if (H5P_get(def_plist, H5F_ACS_DATA_CACHE_BYTE_SIZE_NAME, rdcc_nbytes) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET,FAIL, "can't get default data cache byte size");
} /* end if */
if (rdcc_w0) {
if (H5P_get(plist, H5D_ACS_PREEMPT_READ_CHUNKS_NAME, rdcc_w0) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET,FAIL, "can't get preempt read chunks");
if (*rdcc_w0 < 0)
if (H5P_get(def_plist, H5F_ACS_PREEMPT_READ_CHUNKS_NAME, rdcc_w0) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET,FAIL, "can't get default preempt read chunks");
} /* end if */
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Pget_chunk_cache() */
/*-------------------------------------------------------------------------
* Function: H5P__encode_chunk_cache_nslots
*
* Purpose: Encode the rdcc_nslots parameter to a serialized
* property list. Similar to H5P__encode_size_t except
* the value of 255 for the enc_size field is reserved to
* indicate H5D_ACS_DATA_CACHE_NUM_SLOTS_DEF, in which
* nothing further is encoded.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Neil Fortner
* Wednesday, January 23, 2013
*
*-------------------------------------------------------------------------
*/
static herr_t
H5P__encode_chunk_cache_nslots(const void *value, void **_pp, size_t *size)
{
uint64_t enc_value; /* Property value to encode */
uint8_t **pp = (uint8_t **)_pp;
unsigned enc_size; /* Size of encoded property */
FUNC_ENTER_PACKAGE_NOERR
/* Sanity checks */
HDcompile_assert(sizeof(size_t) <= sizeof(uint64_t));
HDassert(size);
/* Determine if this is the default value, in which case only encode
* enc_size (as 255). Also set size needed for encoding. */
if(*(const size_t *)value == H5D_ACS_DATA_CACHE_NUM_SLOTS_DEF) {
enc_size = 0;
*size += 1;
} /* end if */
else {
enc_value = (uint64_t)*(const size_t *)value;
enc_size = H5VM_limit_enc_size(enc_value);
HDassert(enc_size > 0);
*size += (1 + enc_size);
} /* end else */
HDassert(enc_size < 256);
if(NULL != *pp) {
/* Encode the size */
*(*pp)++ = (uint8_t)enc_size;
/* Encode the value if necessary */
if(enc_size != 0) {
UINT64ENCODE_VAR(*pp, enc_value, enc_size);
} /* end if */
} /* end if */
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5P__encode_chunk_cache_nslots() */
/*-------------------------------------------------------------------------
* Function: H5P__decode_chunk_cache_nslots
*
* Purpose: Decode the rdcc_nslots parameter from a serialized
* property list. Similar to H5P__decode_size_t except
* the value of 255 for the enc_size field is reserved to
* indicate H5D_ACS_DATA_CACHE_NUM_SLOTS_DEF, in which
* nothing further needs to be decoded.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Neil Fortner
* Wednesday, January 23, 2013
*
*-------------------------------------------------------------------------
*/
static herr_t
H5P__decode_chunk_cache_nslots(const void **_pp, void *_value)
{
size_t *value = (size_t *)_value; /* Property value to return */
const uint8_t **pp = (const uint8_t **)_pp;
uint64_t enc_value; /* Decoded property value */
unsigned enc_size; /* Size of encoded property */
FUNC_ENTER_PACKAGE_NOERR
/* Sanity check */
HDcompile_assert(sizeof(size_t) <= sizeof(uint64_t));
HDassert(pp);
HDassert(*pp);
HDassert(value);
/* Decode the size */
enc_size = *(*pp)++;
HDassert(enc_size < 256);
/* Determine if enc_size indicates that this is the default value, in which
* case set value to H5D_ACS_DATA_CACHE_NUM_SLOTS_DEF and return */
if(enc_size == 0)
*value = H5D_ACS_DATA_CACHE_NUM_SLOTS_DEF;
else {
/* Decode the value */
UINT64DECODE_VAR(*pp, enc_value, enc_size);
H5_CHECKED_ASSIGN(*value, uint64_t, enc_value, size_t);
} /* end else */
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5P__decode_chunk_cache_nslots() */
/*-------------------------------------------------------------------------
* Function: H5P__encode_chunk_cache_nbytes
*
* Purpose: Encode the rdcc_nbytes parameter to a serialized
* property list. Similar to H5P__encode_size_t except
* the value of 255 for the enc_size field is reserved to
* indicate H5D_ACS_DATA_CACHE_BYTE_SIZE_DEF, in which
* nothing further is encoded.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Neil Fortner
* Wednesday, January 23, 2013
*
*-------------------------------------------------------------------------
*/
static herr_t
H5P__encode_chunk_cache_nbytes(const void *value, void **_pp, size_t *size)
{
uint64_t enc_value; /* Property value to encode */
uint8_t **pp = (uint8_t **)_pp;
unsigned enc_size; /* Size of encoded property */
FUNC_ENTER_PACKAGE_NOERR
/* Sanity checks */
HDcompile_assert(sizeof(size_t) <= sizeof(uint64_t));
HDassert(size);
/* Determine if this is the default value, in which case only encode
* enc_size (as 255). Also set size needed for encoding. */
if(*(const size_t *)value == H5D_ACS_DATA_CACHE_BYTE_SIZE_DEF) {
enc_size = 0;
*size += 1;
} /* end if */
else {
enc_value = (uint64_t)*(const size_t *)value;
enc_size = H5VM_limit_enc_size(enc_value);
HDassert(enc_size > 0);
*size += (1 + enc_size);
} /* end else */
HDassert(enc_size < 256);
if(NULL != *pp) {
/* Encode the size */
*(*pp)++ = (uint8_t)enc_size;
/* Encode the value if necessary */
if(enc_size != 0) {
UINT64ENCODE_VAR(*pp, enc_value, enc_size);
} /* end if */
} /* end if */
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5P__encode_chunk_cache_nbytes() */
/*-------------------------------------------------------------------------
* Function: H5P__decode_chunk_cache_nbytes
*
* Purpose: Decode the rdcc_nbytes parameter from a serialized
* property list. Similar to H5P__decode_size_t except
* the value of 255 for the enc_size field is reserved to
* indicate H5D_ACS_DATA_CACHE_BYTE_SIZE_DEF, in which
* nothing further needs to be decoded.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Neil Fortner
* Wednesday, January 23, 2013
*
*-------------------------------------------------------------------------
*/
static herr_t
H5P__decode_chunk_cache_nbytes(const void **_pp, void *_value)
{
size_t *value = (size_t *)_value; /* Property value to return */
const uint8_t **pp = (const uint8_t **)_pp;
uint64_t enc_value; /* Decoded property value */
unsigned enc_size; /* Size of encoded property */
FUNC_ENTER_PACKAGE_NOERR
/* Sanity check */
HDcompile_assert(sizeof(size_t) <= sizeof(uint64_t));
HDassert(pp);
HDassert(*pp);
HDassert(value);
/* Decode the size */
enc_size = *(*pp)++;
HDassert(enc_size < 256);
/* Determine if enc_size indicates that this is the default value, in which
* case set value to H5D_ACS_DATA_CACHE_BYTE_SIZE_DEF and return */
if(enc_size == 0)
*value = H5D_ACS_DATA_CACHE_BYTE_SIZE_DEF;
else {
/* Decode the value */
UINT64DECODE_VAR(*pp, enc_value, enc_size);
H5_CHECKED_ASSIGN(*value, uint64_t, enc_value, size_t);
} /* end else */
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5P__decode_chunk_cache_nbytes() */
/*-------------------------------------------------------------------------
* Function: H5Pset_virtual_view
*
* Purpose: Takes the access property list for the virtual dataset,
* dapl_id, and the flag, view, and sets the VDS view
* according to the flag value. The view will include all
* data before the first missing mapped data found if the
* flag is set to H5D_VDS_FIRST_MISSING or to include all
* available mapped data if the flag is set to
* H5D_VDS_LAST_AVAIALBLE. Missing mapped data will be
* filled with the fill value according to the VDS creation
* property settings. For VDS with unlimited mappings, the
* view defines the extent.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Neil Fortner
* May 4, 2015
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pset_virtual_view(hid_t plist_id, H5D_vds_view_t view)
{
H5P_genplist_t *plist; /* Property list pointer */
herr_t ret_value = SUCCEED; /* return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "iDv", plist_id, view);
/* Check argument */
if((view != H5D_VDS_FIRST_MISSING) && (view != H5D_VDS_LAST_AVAILABLE))
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a valid bounds option")
/* Get the plist structure */
if(NULL == (plist = H5P_object_verify(plist_id, H5P_DATASET_ACCESS)))
HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
/* Update property list */
if(H5P_set(plist, H5D_ACS_VDS_VIEW_NAME, &view) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set value")
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Pset_virtual_view() */
/*-------------------------------------------------------------------------
* Function: H5Pget_virtual_view
*
* Purpose: Takes the access property list for the virtual dataset,
* dapl_id, and gets the flag, view, set by the
* H5Pset_virtual_view call. The possible values of view are
* H5D_VDS_FIRST_MISSING or H5D_VDS_LAST_AVAIALBLE.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Neil Fortner
* May 4, 2015
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pget_virtual_view(hid_t plist_id, H5D_vds_view_t *view)
{
H5P_genplist_t *plist; /* Property list pointer */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "i*Dv", plist_id, view);
/* Get the plist structure */
if(NULL == (plist = H5P_object_verify(plist_id, H5P_DATASET_ACCESS)))
HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
/* Get value from property list */
if(view)
if(H5P_get(plist, H5D_ACS_VDS_VIEW_NAME, view) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get value")
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Pget_virtual_view() */
/*-------------------------------------------------------------------------
* Function: H5P__dacc_vds_view_enc
*
* Purpose: Callback routine which is called whenever the vds view
* property in the dataset access property list is encoded.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Neil Fortner
* Tuesday, May 5, 2015
*
*-------------------------------------------------------------------------
*/
static herr_t
H5P__dacc_vds_view_enc(const void *value, void **_pp, size_t *size)
{
const H5D_vds_view_t *view = (const H5D_vds_view_t *)value; /* Create local alias for values */
uint8_t **pp = (uint8_t **)_pp;
FUNC_ENTER_STATIC_NOERR
/* Sanity check */
HDassert(view);
HDassert(size);
if(NULL != *pp)
/* Encode EDC property */
*(*pp)++ = (uint8_t)*view;
/* Size of EDC property */
(*size)++;
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5P__dacc_vds_view_enc() */
/*-------------------------------------------------------------------------
* Function: H5P__dacc_vds_view_dec
*
* Purpose: Callback routine which is called whenever the vds view
* property in the dataset access property list is encoded.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Neil Fortner
* Tuesday, May 5, 2015
*
*-------------------------------------------------------------------------
*/
static herr_t
H5P__dacc_vds_view_dec(const void **_pp, void *_value)
{
H5D_vds_view_t *view = (H5D_vds_view_t *)_value;
const uint8_t **pp = (const uint8_t **)_pp;
FUNC_ENTER_STATIC_NOERR
/* Sanity checks */
HDassert(pp);
HDassert(*pp);
HDassert(view);
/* Decode EDC property */
*view = (H5D_vds_view_t)*(*pp)++;
FUNC_LEAVE_NOAPI(SUCCEED)
} /* end H5P__dacc_vds_view_dec() */
/*-------------------------------------------------------------------------
* Function: H5Pset_virtual_printf_gap
*
* Purpose: Sets the access property list for the virtual dataset,
* dapl_id, to instruct the library to stop looking for the
* mapped data stored in the files and/or datasets with the
* printf-style names after not finding gap_size files and/or
* datasets. The found source files and datasets will
* determine the extent of the unlimited VDS with the printf
* -style mappings.
*
* For example, if regularly spaced blocks of VDS are mapped
* to datasets with the names d-1, d-2, d-3, ..., d-N, ...,
* and d-2 dataset is missing and gap_size is set to 0, then
* VDS will contain only data found in d-1. If d-2 and d-3
* are missing and gap_size is set to 2, then VDS will
* contain the data from d-1, d-3, ..., d-N, .... The blocks
* that are mapped to d-2 and d-3 will be filled according to
* the VDS fill value setting.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Neil Fortner
* May 21, 2015
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pset_virtual_printf_gap(hid_t plist_id, hsize_t gap_size)
{
H5P_genplist_t *plist; /* Property list pointer */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "ih", plist_id, gap_size);
/* Check argument */
if(gap_size == HSIZE_UNDEF)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a valid printf gap size")
/* Get the plist structure */
if(NULL == (plist = H5P_object_verify(plist_id, H5P_DATASET_ACCESS)))
HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
/* Update property list */
if(H5P_set(plist, H5D_ACS_VDS_PRINTF_GAP_NAME, &gap_size) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set value")
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Pset_virtual_printf_gap() */
/*-------------------------------------------------------------------------
* Function: H5Pget_virtual_printf_gap
*
* Purpose: Gets the maximum number of missing printf-style files
* and/or datasets for determining the extent of the
* unlimited VDS, gap_size, using the access property list
* for the virtual dataset, dapl_id. The default library
* value for gap_size is 0.
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Neil Fortner
* May 21, 2015
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pget_virtual_printf_gap(hid_t plist_id, hsize_t *gap_size)
{
H5P_genplist_t *plist; /* Property list pointer */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "i*h", plist_id, gap_size);
/* Get the plist structure */
if(NULL == (plist = H5P_object_verify(plist_id, H5P_DATASET_ACCESS)))
HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
/* Get value from property list */
if(gap_size)
if(H5P_get(plist, H5D_ACS_VDS_PRINTF_GAP_NAME, gap_size) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get value")
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Pget_virtual_printf_gap() */
/*-------------------------------------------------------------------------
* Function: H5Pset_append_flush
*
* Purpose: Sets the boundary, callback function, and user data in the
* property list.
* "ndims": number of array elements for boundary
* "boundary": used to determine whether the current dimension hits
* a boundary; if so, invoke the callback function and
* flush the dataset.
* "func": the callback function to invoke when the boundary is hit
* "udata": the user data to pass as parameter with the callback function
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Vailin Choi; Dec 2013
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pset_append_flush(hid_t plist_id, unsigned ndims, const hsize_t *boundary, H5D_append_cb_t func, void *udata)
{
H5P_genplist_t *plist; /* Property list pointer */
H5D_append_flush_t info; /* Property for append flush parameters */
unsigned u; /* Local index variable */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE5("e", "iIu*hx*x", plist_id, ndims, boundary, func, udata);
/* Check arguments */
if(0 == ndims)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "dimensionality cannot be zero")
if(ndims > H5S_MAX_RANK)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "dimensionality is too large")
if(!boundary)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no boundary dimensions specified")
/* Check if the callback function is NULL and the user data is non-NULL.
* This is almost certainly an error as the user data will not be used. */
if(!func && udata)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "callback is NULL while user data is not")
/* Get the plist structure */
if(NULL == (plist = H5P_object_verify(plist_id, H5P_DATASET_ACCESS)))
HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
/* Set up values */
info.ndims = ndims;
info.func = func;
info.udata = udata;
HDmemset(info.boundary, 0, sizeof(info.boundary));
/* boundary can be 0 to indicate no boundary is set */
for(u = 0; u < ndims; u++) {
if(boundary[u] != (boundary[u] & 0xffffffff)) /* negative value (including H5S_UNLIMITED) */
HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "all boundary dimensions must be less than 2^32")
info.boundary[u] = boundary[u]; /* Store user's boundary dimensions */
} /* end for */
/* Set values */
if(H5P_set(plist, H5D_ACS_APPEND_FLUSH_NAME, &info) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set append flush")
done:
FUNC_LEAVE_API(ret_value)
} /* H5Pset_append_flush() */
/*-------------------------------------------------------------------------
* Function: H5Pget_append_flush()
*
* Purpose: Retrieves the boundary, callback function and user data set in
* property list.
* Note that the # of boundary sizes to retrieve will not exceed
* the parameter "ndims" and the ndims set previously via
* H5Pset_append_flush().
*
* Return: Non-negative on success/Negative on failure
*
* Programmer: Vailin Choi; Dec 2013
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pget_append_flush(hid_t plist_id, unsigned ndims, hsize_t boundary[], H5D_append_cb_t *func, void **udata)
{
H5P_genplist_t *plist; /* property list pointer */
H5D_append_flush_t info;
unsigned u; /* local index variable */
herr_t ret_value = SUCCEED; /* return value */
FUNC_ENTER_API(FAIL)
H5TRACE5("e", "iIu*h*x**x", plist_id, ndims, boundary, func, udata);
/* Get the plist structure */
if(NULL == (plist = H5P_object_verify(plist_id, H5P_DATASET_ACCESS)))
HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
/* Retrieve info for append flush */
if(H5P_get(plist, H5D_ACS_APPEND_FLUSH_NAME, &info) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get object flush callback")
/* Assign return values */
if(boundary) {
HDmemset(boundary, 0, ndims * sizeof(hsize_t));
if(info.ndims > 0)
for(u = 0; u < info.ndims && u < ndims; u++)
boundary[u] = info.boundary[u];
} /* end if */
if(func)
*func = info.func;
if(udata)
*udata = info.udata;
done:
FUNC_LEAVE_API(ret_value)
} /* H5Pget_append_flush() */
/*-------------------------------------------------------------------------
* Function: H5Pset_efile_prefix
*
* Purpose: Set a prefix to be used for any external files.
*
* If the prefix starts with ${ORIGIN}, this will be replaced by
* the absolute path of the directory of the HDF5 file containing
* the dataset.
*
* If the prefix is ".", no prefix will be applied.
*
* This property can be overwritten by the environment variable
* HDF5_EXTFILE_PREFIX.
*
* Return: Non-negative on success/Negative on failure
*
*-------------------------------------------------------------------------
*/
herr_t
H5Pset_efile_prefix(hid_t plist_id, const char *prefix)
{
H5P_genplist_t *plist; /* Property list pointer */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE2("e", "i*s", plist_id, prefix);
/* Get the plist structure */
if(NULL == (plist = H5P_object_verify(plist_id, H5P_DATASET_ACCESS)))
HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
/* Set prefix */
if(H5P_set(plist, H5D_ACS_EFILE_PREFIX_NAME, &prefix) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set prefix info")
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Pset_efile_prefix() */
/*-------------------------------------------------------------------------
* Function: H5Pget_efile_prefix
*
* Purpose: Gets the prefix to be used for any external files.
*
* If the pointer is not NULL, it points to a user-allocated
* buffer.
*
* Return: Non-negative on success/Negative on failure
*
*-------------------------------------------------------------------------
*/
ssize_t
H5Pget_efile_prefix(hid_t plist_id, char *prefix, size_t size)
{
H5P_genplist_t *plist; /* Property list pointer */
char *my_prefix; /* Library's copy of the prefix */
size_t len; /* Length of prefix string */
ssize_t ret_value; /* Return value */
FUNC_ENTER_API(FAIL)
H5TRACE3("Zs", "i*sz", plist_id, prefix, size);
/* Get the plist structure */
if(NULL == (plist = H5P_object_verify(plist_id, H5P_DATASET_ACCESS)))
HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
/* Get the current prefix */
if(H5P_peek(plist, H5D_ACS_EFILE_PREFIX_NAME, &my_prefix) < 0)
HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get external file prefix")
/* Check for prefix being set */
if(my_prefix) {
/* Copy to user's buffer, if given */
len = HDstrlen(my_prefix);
if(prefix) {
HDstrncpy(prefix, my_prefix, MIN(len + 1, size));
if(len >= size)
prefix[size - 1] = '\0';
} /* end if */
} /* end if */
else
len = 0;
/* Set return value */
ret_value = (ssize_t)len;
done:
FUNC_LEAVE_API(ret_value)
} /* end H5Pget_efile_prefix() */
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