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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdlib.h>
#include <inttypes.h>
#include "mpeg2.h"
static void * (* malloc_hook) (unsigned size, mpeg2_alloc_t reason) = NULL;
static int (* free_hook) (void * buf) = NULL;
void * mpeg2_malloc (unsigned size, mpeg2_alloc_t reason)
{
char * buf;
if (malloc_hook) {
buf = (char *) malloc_hook (size, reason);
if (buf)
return buf;
}
if (size) {
buf = (char *) malloc (size + 63 + sizeof (void **));
if (buf) {
char * align_buf;
align_buf = buf + 63 + sizeof (void **);
align_buf -= (long)align_buf & 63;
*(((void **)align_buf) - 1) = buf;
return align_buf;
}
}
return NULL;
}
void mpeg2_free (void * buf)
{
if (free_hook && free_hook (buf))
return;
if (buf)
free (*(((void **)buf) - 1));
}
void mpeg2_malloc_hooks (void * malloc (unsigned, mpeg2_alloc_t),
int free (void *))
{
malloc_hook = malloc;
free_hook = free;
}
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