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71 lines
1.9 KiB
71 lines
1.9 KiB
15 years ago
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/*
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* alloc.c
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* Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
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* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
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*
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* This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
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* See http://libmpeg2.sourceforge.net/ for updates.
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*
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* mpeg2dec is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mpeg2dec 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; 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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#include <stdlib.h>
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#include <inttypes.h>
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#include "mpeg2.h"
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static void * (* malloc_hook) (unsigned size, mpeg2_alloc_t reason) = NULL;
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static int (* free_hook) (void * buf) = NULL;
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void * mpeg2_malloc (unsigned size, mpeg2_alloc_t reason)
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{
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char * buf;
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if (malloc_hook) {
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buf = (char *) malloc_hook (size, reason);
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if (buf)
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return buf;
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}
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if (size) {
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buf = (char *) malloc (size + 63 + sizeof (void **));
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if (buf) {
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char * align_buf;
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align_buf = buf + 63 + sizeof (void **);
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align_buf -= (long)align_buf & 63;
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*(((void **)align_buf) - 1) = buf;
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return align_buf;
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}
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}
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return NULL;
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}
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void mpeg2_free (void * buf)
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{
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if (free_hook && free_hook (buf))
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return;
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if (buf)
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free (*(((void **)buf) - 1));
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}
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void mpeg2_malloc_hooks (void * malloc (unsigned, mpeg2_alloc_t),
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int free (void *))
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{
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malloc_hook = malloc;
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free_hook = free;
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}
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