62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
/****************************************************************************
|
|
* mm/mm_heap/mm_calloc.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <nuttx/mm/mm.h>
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: mm_calloc
|
|
*
|
|
* Descriptor:
|
|
* mm_calloc() calculates the size of the allocation and calls mm_zalloc()
|
|
*
|
|
****************************************************************************/
|
|
|
|
FAR void *mm_calloc(FAR struct mm_heap_s *heap, size_t n, size_t elem_size)
|
|
{
|
|
FAR void *mem = NULL;
|
|
|
|
/* Verify input parameters
|
|
*
|
|
* elem_size or n is zero treats as valid input.
|
|
*
|
|
* Assure that the following multiplication cannot overflow the size_t
|
|
* type, i.e., that: SIZE_MAX >= n * elem_size
|
|
*
|
|
* Refer to SEI CERT C Coding Standard.
|
|
*/
|
|
|
|
if (elem_size == 0 || n <= (SIZE_MAX / elem_size))
|
|
{
|
|
mem = mm_zalloc(heap, n * elem_size);
|
|
}
|
|
|
|
return mem;
|
|
}
|