69 lines
1.7 KiB
C++
69 lines
1.7 KiB
C++
/*
|
|
* default memory allocator for libavutil
|
|
* Copyright (c) 2002 Fabrice Bellard
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file libavutil/mem.c
|
|
* default memory allocator for libavutil
|
|
*/
|
|
|
|
#include <limits.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#if HAVE_MALLOC_H
|
|
#include <malloc.h>
|
|
#endif
|
|
#include "common.h"
|
|
|
|
/* You can redefine av_malloc and av_free in your project to use your
|
|
memory allocator. You do not need to suppress this file because the
|
|
linker will do it automatically. */
|
|
|
|
void *av_malloc(unsigned int size)
|
|
{
|
|
void *ptr = NULL;
|
|
long diff;
|
|
|
|
/* let's disallow possible ambiguous cases */
|
|
if(size > (INT_MAX-16) )
|
|
return NULL;
|
|
|
|
ptr = malloc(size+16);
|
|
if(!ptr)
|
|
return ptr;
|
|
diff= ((-(long)ptr - 1)&15) + 1;
|
|
ptr = (char*)ptr + diff;
|
|
((char*)ptr)[-1]= diff;
|
|
return ptr;
|
|
}
|
|
|
|
void av_free(void *ptr)
|
|
{
|
|
/* XXX: this test should not be needed on most libcs */
|
|
if (ptr)
|
|
free((char*)ptr - ((char*)ptr)[-1]);
|
|
}
|
|
|
|
void av_freep(void **arg)
|
|
{
|
|
av_free(*arg);
|
|
*arg = NULL;
|
|
}
|