FFmpeg
semaphore.h
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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 
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 */
const char const char void * val
Definition: avisynth_c.h:863
static int compat_sem_init(dispatch_semaphore_t *psem, int unused, int val)
Definition: semaphore.h:31