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150 lines
2.9 KiB
C
150 lines
2.9 KiB
C
/*
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* default memory allocator for libavutil
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* Copyright (c) 2002 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* default memory allocator for libavutil
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*/
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <malloc.h>
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#include "mem.h"
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void *av_malloc(size_t size)
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{
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void *ptr;
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if (size > INT_MAX)
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return NULL;
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ptr = malloc(size);
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return ptr;
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}
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void *av_mallocz(size_t size)
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{
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void *ptr;
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ptr = av_malloc(size);
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if (!ptr)
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return NULL;
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memset(ptr, 0, size);
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return ptr;
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}
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void *av_realloc(void *ptr, size_t size)
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{
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if (size > INT_MAX)
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return NULL;
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return realloc(ptr, size);
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}
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void *av_realloc_f(void *ptr, size_t nelem, size_t elsize)
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{
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size_t size;
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void *r;
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if (av_size_mult(elsize, nelem, &size)) {
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av_free(ptr);
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return NULL;
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}
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r = av_realloc(ptr, size);
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if (!r)
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av_free(ptr);
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return r;
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}
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int av_reallocp(void *ptr, size_t size)
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{
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void *val;
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if (!size) {
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av_freep(ptr);
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return 0;
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}
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memcpy(&val, ptr, sizeof(val));
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val = av_realloc(val, size);
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if (!val) {
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av_freep(ptr);
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return -1;
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}
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memcpy(ptr, &val, sizeof(val));
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return 0;
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}
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void *av_malloc_array(size_t nmemb, size_t size)
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{
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size_t result;
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if (av_size_mult(nmemb, size, &result) < 0)
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return NULL;
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return av_malloc(result);
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}
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void *av_mallocz_array(size_t nmemb, size_t size)
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{
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size_t result;
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if (av_size_mult(nmemb, size, &result) < 0)
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return NULL;
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return av_mallocz(result);
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}
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void *av_realloc_array(void *ptr, size_t nmemb, size_t size)
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{
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size_t result;
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if (av_size_mult(nmemb, size, &result) < 0)
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return NULL;
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return av_realloc(ptr, result);
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}
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int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
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{
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void *val;
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memcpy(&val, ptr, sizeof(val));
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val = av_realloc_f(val, nmemb, size);
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memcpy(ptr, &val, sizeof(val));
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if (!val && nmemb && size)
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return -1;
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return 0;
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}
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void av_free(void *ptr)
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{
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free(ptr);
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}
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void av_freep(void *arg)
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{
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void *val;
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memcpy(&val, arg, sizeof(val));
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memcpy(arg, &(void *){ NULL }, sizeof(val));
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av_free(val);
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}
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