jack: Support OSX
[libav.git] / compat / dispatch_semaphore / semaphore.h
1 /*
2 * This file is part of Libav.
3 *
4 * Libav 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 * Libav 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 Libav; 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
31 static 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 */