91 lines
3.1 KiB
C
91 lines
3.1 KiB
C
/****************************************************************************
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* mm/umm_heap/umm_calloc.c
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*
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* Copyright (C) 2007, 2009, 2014-2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdlib.h>
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#include <nuttx/mm/mm.h>
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#include "umm_heap/umm_heap.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: calloc
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*
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* Description:
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* calloc is a thin wrapper for mm_calloc()
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*
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****************************************************************************/
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FAR void *calloc(size_t n, size_t elem_size)
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{
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#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)
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/* Use zalloc() because it implements the sbrk() logic */
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FAR void *ret = NULL;
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/* Verify input parameters */
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if (n > 0 && elem_size > 0)
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{
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/* Assure that the following multiplication cannot overflow the size_t
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* type, i.e., that: SIZE_MAX >= n * elem_size
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*
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* Refer to SEI CERT C Coding Standard.
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*/
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if (n <= (SIZE_MAX / elem_size))
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{
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ret = zalloc(n * elem_size);
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}
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}
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return ret;
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#else
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/* Use mm_calloc() because it implements the clear */
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return mm_calloc(USR_HEAP, n, elem_size);
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#endif
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}
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