88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/****************************************************************************
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* mm/umm_heap/umm_calloc.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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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#undef calloc /* See mm/README.txt */
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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 *mem = NULL;
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/* Verify input parameters
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*
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* elem_size or n is zero treats as valid input.
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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 (elem_size == 0 || n <= (SIZE_MAX / elem_size))
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{
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/* Use zalloc() because it implements the sbrk() logic */
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mem = zalloc(n * elem_size);
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}
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return mem;
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#else
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/* Use mm_calloc() because it implements the clear */
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FAR void *mem = mm_calloc(USR_HEAP, n, elem_size);
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if (mem == NULL)
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{
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set_errno(ENOMEM);
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}
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else
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{
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mm_notify_pressure(mm_heapfree(USR_HEAP),
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mm_heapfree_largest(USR_HEAP));
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}
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return mem;
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#endif
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}
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