hwcontext_d3d11va: implement av_hwdevice_get_hwframe_constraints()
[ffmpeg.git] / libavutil / thread.h
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 #if HAVE_PTHREADS
30 #include <pthread.h>
31
32 #if defined(ASSERT_LEVEL) && ASSERT_LEVEL > 1
33
34 #include "log.h"
35
36 #define ASSERT_PTHREAD_NORET(func, ...) do {                            \
37     int ret = func(__VA_ARGS__);                                        \
38     if (ret) {                                                          \
39         char errbuf[AV_ERROR_MAX_STRING_SIZE] = "";                     \
40         av_log(NULL, AV_LOG_FATAL, AV_STRINGIFY(func)                   \
41                " failed with error: %s\n",                              \
42                av_make_error_string(errbuf, AV_ERROR_MAX_STRING_SIZE,   \
43                                     AVERROR(ret)));                     \
44         abort();                                                        \
45     }                                                                   \
46 } while (0)
47
48 #define ASSERT_PTHREAD(func, ...) do {                                  \
49     ASSERT_PTHREAD_NORET(func, __VA_ARGS__);                            \
50     return 0;                                                           \
51 } while (0)
52
53 static inline int strict_pthread_join(pthread_t thread, void **value_ptr)
54 {
55     ASSERT_PTHREAD(pthread_join, thread, value_ptr);
56 }
57
58 static inline int strict_pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
59 {
60     if (attr) {
61         ASSERT_PTHREAD_NORET(pthread_mutex_init, mutex, attr);
62     } else {
63         pthread_mutexattr_t local_attr;
64         ASSERT_PTHREAD_NORET(pthread_mutexattr_init, &local_attr);
65         ASSERT_PTHREAD_NORET(pthread_mutexattr_settype, &local_attr, PTHREAD_MUTEX_ERRORCHECK);
66         ASSERT_PTHREAD_NORET(pthread_mutex_init, mutex, &local_attr);
67         ASSERT_PTHREAD_NORET(pthread_mutexattr_destroy, &local_attr);
68     }
69     return 0;
70 }
71
72 static inline int strict_pthread_mutex_destroy(pthread_mutex_t *mutex)
73 {
74     ASSERT_PTHREAD(pthread_mutex_destroy, mutex);
75 }
76
77 static inline int strict_pthread_mutex_lock(pthread_mutex_t *mutex)
78 {
79     ASSERT_PTHREAD(pthread_mutex_lock, mutex);
80 }
81
82 static inline int strict_pthread_mutex_unlock(pthread_mutex_t *mutex)
83 {
84     ASSERT_PTHREAD(pthread_mutex_unlock, mutex);
85 }
86
87 static inline int strict_pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
88 {
89     ASSERT_PTHREAD(pthread_cond_init, cond, attr);
90 }
91
92 static inline int strict_pthread_cond_destroy(pthread_cond_t *cond)
93 {
94     ASSERT_PTHREAD(pthread_cond_destroy, cond);
95 }
96
97 static inline int strict_pthread_cond_signal(pthread_cond_t *cond)
98 {
99     ASSERT_PTHREAD(pthread_cond_signal, cond);
100 }
101
102 static inline int strict_pthread_cond_broadcast(pthread_cond_t *cond)
103 {
104     ASSERT_PTHREAD(pthread_cond_broadcast, cond);
105 }
106
107 static inline int strict_pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
108 {
109     ASSERT_PTHREAD(pthread_cond_wait, cond, mutex);
110 }
111
112 static inline int strict_pthread_once(pthread_once_t *once_control, void (*init_routine)(void))
113 {
114     ASSERT_PTHREAD(pthread_once, once_control, init_routine);
115 }
116
117 #define pthread_join           strict_pthread_join
118 #define pthread_mutex_init     strict_pthread_mutex_init
119 #define pthread_mutex_destroy  strict_pthread_mutex_destroy
120 #define pthread_mutex_lock     strict_pthread_mutex_lock
121 #define pthread_mutex_unlock   strict_pthread_mutex_unlock
122 #define pthread_cond_init      strict_pthread_cond_init
123 #define pthread_cond_destroy   strict_pthread_cond_destroy
124 #define pthread_cond_signal    strict_pthread_cond_signal
125 #define pthread_cond_broadcast strict_pthread_cond_broadcast
126 #define pthread_cond_wait      strict_pthread_cond_wait
127 #define pthread_once           strict_pthread_once
128 #endif
129
130 #elif HAVE_OS2THREADS
131 #include "compat/os2threads.h"
132 #else
133 #include "compat/w32pthreads.h"
134 #endif
135
136 #define AVMutex pthread_mutex_t
137 #define AV_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
138
139 #define ff_mutex_init    pthread_mutex_init
140 #define ff_mutex_lock    pthread_mutex_lock
141 #define ff_mutex_unlock  pthread_mutex_unlock
142 #define ff_mutex_destroy pthread_mutex_destroy
143
144 #define AVOnce pthread_once_t
145 #define AV_ONCE_INIT PTHREAD_ONCE_INIT
146
147 #define ff_thread_once(control, routine) pthread_once(control, routine)
148
149 #else
150
151 #define AVMutex char
152 #define AV_MUTEX_INITIALIZER 0
153
154 static inline int ff_mutex_init(AVMutex *mutex, const void *attr){ return 0; }
155 static inline int ff_mutex_lock(AVMutex *mutex){ return 0; }
156 static inline int ff_mutex_unlock(AVMutex *mutex){ return 0; }
157 static inline int ff_mutex_destroy(AVMutex *mutex){ return 0; }
158
159 #define AVOnce char
160 #define AV_ONCE_INIT 0
161
162 static inline int ff_thread_once(char *control, void (*routine)(void))
163 {
164     if (!*control) {
165         routine();
166         *control = 1;
167     }
168     return 0;
169 }
170
171 #endif
172
173 #endif /* AVUTIL_THREAD_H */