1/*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19#ifndef COMPAT_DISPATCH_SEMAPHORE_SEMAPHORE_H
20#define COMPAT_DISPATCH_SEMAPHORE_SEMAPHORE_H
21
22#include <dispatch/dispatch.h>
23#include <errno.h>
24
25#define sem_t dispatch_semaphore_t
26#define sem_post(psem)              dispatch_semaphore_signal(*psem)
27#define sem_wait(psem)              dispatch_semaphore_wait(*psem, DISPATCH_TIME_FOREVER)
28#define sem_timedwait(psem, val)    dispatch_semaphore_wait(*psem, dispatch_walltime(val, 0))
29#define sem_destroy(psem)           dispatch_release(*psem)
30
31static inline int compat_sem_init(dispatch_semaphore_t *psem,
32                                  int unused, int val)
33{
34    int ret = !!(*psem = dispatch_semaphore_create(val)) - 1;
35    if (ret < 0)
36        errno = ENOMEM;
37    return ret;
38}
39
40#define sem_init compat_sem_init
41
42#endif /* COMPAT_DISPATCH_SEMAPHORE_SEMAPHORE_H */
43