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/*
* alloc.c
* Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
*
* This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
* See http://libmpeg2.sourceforge.net/ for updates.
*
* mpeg2dec is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mpeg2dec 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include <stdlib.h>
#include <inttypes.h>
#include "mpeg2.h"
#include "mpeg2_internal.h"
#if defined(HAVE_MEMALIGN) && !defined(__cplusplus)
/* some systems have memalign() but no declaration for it */
void * memalign (size_t align, size_t size);
#endif
void * (* mpeg2_malloc_hook) (int size, int reason) = NULL;
int (* mpeg2_free_hook) (void * buf) = NULL;
void * mpeg2_malloc (int size, int reason)
{
char * buf;
if (mpeg2_malloc_hook) {
buf = (char *) mpeg2_malloc_hook (size, reason);
if (buf)
return buf;
}
#if defined(HAVE_MEMALIGN) && !defined(__cplusplus) && !defined(DEBUG)
return memalign (16, size);
#else
buf = (char *) malloc (size + 15 + sizeof (void **));
if (buf) {
char * align_buf;
align_buf = buf + 15 + sizeof (void **);
align_buf -= (long)align_buf & 15;
*(((void **)align_buf) - 1) = buf;
return align_buf;
}
return NULL;
#endif
}
void mpeg2_free (void * buf)
{
if (mpeg2_free_hook && mpeg2_free_hook (buf))
return;
#if defined(HAVE_MEMALIGN) && !defined(__cplusplus) && !defined(DEBUG)
free (buf);
#else
free (*(((void **)buf) - 1));
#endif
}
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