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thread.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 // This header should only be used to simplify code where
20 // threading is optional, not as a generic threading abstraction.
21 
22 #ifndef AVUTIL_THREAD_H
23 #define AVUTIL_THREAD_H
24 
25 #include "config.h"
26 
27 #if HAVE_PTHREADS || HAVE_W32THREADS || HAVE_OS2THREADS
28 
29 #define USE_ATOMICS 0
30 
31 #if HAVE_PTHREADS
32 #include <pthread.h>
33 #elif HAVE_OS2THREADS
34 #include "compat/os2threads.h"
35 #else
36 #include "compat/w32pthreads.h"
37 #endif
38 
39 #define AVMutex pthread_mutex_t
40 
41 #define ff_mutex_init pthread_mutex_init
42 #define ff_mutex_lock pthread_mutex_lock
43 #define ff_mutex_unlock pthread_mutex_unlock
44 #define ff_mutex_destroy pthread_mutex_destroy
45 
46 #else
47 
48 #define USE_ATOMICS 1
49 
50 #define AVMutex char
51 
52 #define ff_mutex_init(mutex, attr) (0)
53 #define ff_mutex_lock(mutex) (0)
54 #define ff_mutex_unlock(mutex) (0)
55 #define ff_mutex_destroy(mutex) (0)
56 
57 #endif
58 
59 #endif /* AVUTIL_THREAD_H */