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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* 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://www.hdfgroup.org/licenses. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* Purpose: Blob callbacks for the native VOL connector
*/
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fprivate.h" /* File access */
#include "H5HGprivate.h" /* Global Heaps */
#include "H5VLnative_private.h" /* Native VOL connector */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Local Prototypes */
/********************/
/*********************/
/* Package Variables */
/*********************/
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/*-------------------------------------------------------------------------
* Function: H5VL__native_blob_put
*
* Purpose: Handles the blob 'put' callback
*
* Return: SUCCEED / FAIL
*
*-------------------------------------------------------------------------
*/
herr_t
H5VL__native_blob_put(void *obj, const void *buf, size_t size, void *blob_id, void H5_ATTR_UNUSED *ctx)
{
H5F_t *f = (H5F_t *)obj; /* Retrieve file pointer */
uint8_t *id = (uint8_t *)blob_id; /* Pointer to blob ID */
H5HG_t hobjid; /* New VL sequence's heap ID */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_PACKAGE
/* Check parameters */
assert(f);
assert(size == 0 || buf);
assert(id);
/* Write the VL information to disk (allocates space also) */
if (H5HG_insert(f, size, buf, &hobjid) < 0)
HGOTO_ERROR(H5E_VOL, H5E_WRITEERROR, FAIL, "unable to write blob information")
/* Encode the heap information */
H5F_addr_encode(f, &id, hobjid.addr);
UINT32ENCODE(id, hobjid.idx);
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5VL__native_blob_put() */
/*-------------------------------------------------------------------------
* Function: H5VL__native_blob_get
*
* Purpose: Handles the blob 'get' callback
*
* Return: SUCCEED / FAIL
*
*-------------------------------------------------------------------------
*/
herr_t
H5VL__native_blob_get(void *obj, const void *blob_id, void *buf, size_t size, void H5_ATTR_UNUSED *ctx)
{
H5F_t *f = (H5F_t *)obj; /* Retrieve file pointer */
const uint8_t *id = (const uint8_t *)blob_id; /* Pointer to the disk blob ID */
H5HG_t hobjid; /* Global heap ID for sequence */
size_t hobj_size = 0; /* Global heap object size returned from H5HG_read() */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_PACKAGE
/* Sanity check */
assert(f);
assert(id);
assert(buf);
/* Get the heap information */
H5F_addr_decode(f, &id, &hobjid.addr);
UINT32DECODE(id, hobjid.idx);
/* Check if this sequence actually has any data */
if (hobjid.addr > 0)
/* Read the VL information from disk */
if (NULL == H5HG_read(f, &hobjid, buf, &hobj_size))
HGOTO_ERROR(H5E_VOL, H5E_READERROR, FAIL, "unable to read VL information")
/* Verify the size is correct */
if (hobj_size != size)
HGOTO_ERROR(H5E_VOL, H5E_CANTDECODE, FAIL, "Expected global heap object size does not match")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5VL__native_blob_get() */
/*-------------------------------------------------------------------------
* Function: H5VL__native_blob_specific
*
* Purpose: Handles the blob 'specific' callback
*
* Return: SUCCEED / FAIL
*
*-------------------------------------------------------------------------
*/
herr_t
H5VL__native_blob_specific(void *obj, void *blob_id, H5VL_blob_specific_args_t *args)
{
H5F_t *f = (H5F_t *)obj; /* Retrieve file pointer */
herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_PACKAGE
/* Sanity check */
assert(f);
assert(blob_id);
switch (args->op_type) {
case H5VL_BLOB_ISNULL: {
const uint8_t *id = (const uint8_t *)blob_id; /* Pointer to the blob ID */
haddr_t addr; /* Sequence's heap address */
/* Get the heap address */
H5F_addr_decode(f, &id, &addr);
/* Check if heap address is 'nil' */
*args->args.is_null.isnull = (addr == 0 ? TRUE : FALSE);
break;
}
case H5VL_BLOB_SETNULL: {
uint8_t *id = (uint8_t *)blob_id; /* Pointer to the blob ID */
/* Encode the 'nil' heap pointer information */
H5F_addr_encode(f, &id, (haddr_t)0);
UINT32ENCODE(id, 0);
break;
}
case H5VL_BLOB_DELETE: {
const uint8_t *id = (const uint8_t *)blob_id; /* Pointer to the blob ID */
H5HG_t hobjid; /* VL sequence's heap ID */
/* Get heap information */
H5F_addr_decode(f, &id, &hobjid.addr);
UINT32DECODE(id, hobjid.idx);
/* Free heap object */
if (hobjid.addr > 0)
if (H5HG_remove(f, &hobjid) < 0)
HGOTO_ERROR(H5E_VOL, H5E_CANTREMOVE, FAIL, "unable to remove heap object")
break;
}
default:
HGOTO_ERROR(H5E_VOL, H5E_UNSUPPORTED, FAIL, "invalid specific operation")
} /* end switch */
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5VL__native_blob_specific() */
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