84 lines
2.4 KiB
C
84 lines
2.4 KiB
C
/****************************************************************************
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* mm/umm_heap/umm_zalloc.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 <string.h>
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#include <errno.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: zalloc
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*
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* Description:
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* Allocate and zero memory from the user heap.
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*
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* Input Parameters:
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* size - Size (in bytes) of the memory region to be allocated.
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*
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* Returned Value:
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* The address of the allocated memory (NULL on failure to allocate)
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*
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****************************************************************************/
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#undef zalloc /* See mm/README.txt */
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FAR void *zalloc(size_t size)
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{
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#ifdef CONFIG_ARCH_ADDRENV
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/* Use malloc() because it implements the sbrk() logic */
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FAR void *mem = malloc(size);
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if (mem)
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{
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memset(mem, 0, size);
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}
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return mem;
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#else
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FAR void *ret;
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/* Use mm_zalloc() because it implements the clear */
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ret = mm_zalloc(USR_HEAP, size);
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if (ret == 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 ret;
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#endif
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}
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