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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. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*-------------------------------------------------------------------------
*
* Created: H5HLprfx.c
*
* Purpose: Prefix routines for local heaps.
*
*-------------------------------------------------------------------------
*/
/****************/
/* Module Setup */
/****************/
#include "H5HLmodule.h" /* This source code file is part of the H5HL module */
/***********/
/* Headers */
/***********/
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5FLprivate.h" /* Free lists */
#include "H5HLpkg.h" /* Local Heaps */
/****************/
/* Local Macros */
/****************/
/******************/
/* Local Typedefs */
/******************/
/********************/
/* Package Typedefs */
/********************/
/********************/
/* Local Prototypes */
/********************/
/*********************/
/* Package Variables */
/*********************/
/*****************************/
/* Library Private Variables */
/*****************************/
/*******************/
/* Local Variables */
/*******************/
/* Declare a free list to manage the H5HL_prfx_t struct */
H5FL_DEFINE_STATIC(H5HL_prfx_t);
/*-------------------------------------------------------------------------
* Function: H5HL__prfx_new
*
* Purpose: Create a new local heap prefix object
*
* Return: Success: non-NULL pointer to new local heap prefix
* Failure: NULL
*
*-------------------------------------------------------------------------
*/
H5HL_prfx_t *
H5HL__prfx_new(H5HL_t *heap)
{
H5HL_prfx_t *prfx = NULL; /* New local heap prefix */
H5HL_prfx_t *ret_value = NULL;
FUNC_ENTER_PACKAGE
/* check arguments */
assert(heap);
/* Allocate new local heap prefix */
if (NULL == (prfx = H5FL_CALLOC(H5HL_prfx_t)))
HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, NULL, "memory allocation failed for local heap prefix");
/* Increment ref. count on heap data structure */
if (FAIL == H5HL__inc_rc(heap))
HGOTO_ERROR(H5E_HEAP, H5E_CANTINC, NULL, "can't increment heap ref. count");
/* Link the heap & the prefix */
prfx->heap = heap;
heap->prfx = prfx;
/* Set the return value */
ret_value = prfx;
done:
/* Ensure that the prefix memory is deallocated on errors */
if (!ret_value && prfx != NULL)
/* H5FL_FREE always returns NULL so we can't check for errors */
prfx = H5FL_FREE(H5HL_prfx_t, prfx);
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5HL__prfx_new() */
/*-------------------------------------------------------------------------
* Function: H5HL__prfx_dest
*
* Purpose: Destroy a local heap prefix object
*
* Return: SUCCEED/FAIL
*
*-------------------------------------------------------------------------
*/
herr_t
H5HL__prfx_dest(H5HL_prfx_t *prfx)
{
herr_t ret_value = SUCCEED;
FUNC_ENTER_PACKAGE
/* check arguments */
assert(prfx);
/* Check if prefix was initialized */
if (prfx->heap) {
/* Unlink prefix from heap */
prfx->heap->prfx = NULL;
/* Decrement ref. count on heap data structure */
if (FAIL == H5HL__dec_rc(prfx->heap))
HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement heap ref. count");
/* Unlink heap from prefix */
prfx->heap = NULL;
}
done:
/* Free prefix memory */
/* H5FL_FREE always returns NULL so we can't check for errors */
prfx = H5FL_FREE(H5HL_prfx_t, prfx);
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5HL__prfx_dest() */
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