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put memory functions in a separate file so that the user can redefini…
…te them without modifying the library Originally committed as revision 684 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Fabrice Bellard
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Jun 11, 2002
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/* | ||
* default memory allocator for libavcodec | ||
* Copyright (c) 2002 Fabrice Bellard. | ||
* | ||
* This library 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 of the License, or (at your option) any later version. | ||
* | ||
* This library 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 this library; if not, write to the Free Software | ||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
*/ | ||
#include "avcodec.h" | ||
#ifdef HAVE_MALLOC_H | ||
#include <malloc.h> | ||
#endif | ||
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/* 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 */ | ||
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/* memory alloc */ | ||
void *av_malloc(int size) | ||
{ | ||
void *ptr; | ||
#if defined ( ARCH_X86 ) && defined ( HAVE_MEMALIGN ) && 0 | ||
ptr = memalign(64,size); | ||
/* Why 64? | ||
Indeed, we should align it: | ||
on 4 for 386 | ||
on 16 for 486 | ||
on 32 for 586, PPro - k6-III | ||
on 64 for K7 (maybe for P3 too). | ||
Because L1 and L2 caches are aligned on those values. | ||
But I don't want to code such logic here! | ||
*/ | ||
#else | ||
ptr = malloc(size); | ||
#endif | ||
if (!ptr) | ||
return NULL; | ||
/* NOTE: this memset should not be present */ | ||
memset(ptr, 0, size); | ||
return ptr; | ||
} | ||
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/* NOTE: ptr = NULL is explicetly allowed */ | ||
void av_free(void *ptr) | ||
{ | ||
/* XXX: this test should not be needed on most libcs */ | ||
if (ptr) | ||
free(ptr); | ||
} | ||
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