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 <stdlib.h>
35
36 #include "error.h"
37 #include "log.h"
38 #include "macros.h"
39
40 #define ASSERT_PTHREAD_ABORT(func, ret) do { \
41 char errbuf[AV_ERROR_MAX_STRING_SIZE] = ""; \
42 av_log(NULL, AV_LOG_FATAL, AV_STRINGIFY(func) \
43 " failed with error: %s\n", \
44 av_make_error_string(errbuf, AV_ERROR_MAX_STRING_SIZE, \
45 AVERROR(ret))); \
46 abort(); \
47 } while (0)
48
49 #define ASSERT_PTHREAD_NORET(func, ...) do { \
50 int ret = func(__VA_ARGS__); \
51 if (ret) \
52 ASSERT_PTHREAD_ABORT(func, ret); \
53 } while (0)
54
55 #define ASSERT_PTHREAD(func, ...) do { \
56 ASSERT_PTHREAD_NORET(func, __VA_ARGS__); \
57 return 0; \
58 } while (0)
59
strict_pthread_join(pthread_t thread,void ** value_ptr)60 static inline int strict_pthread_join(pthread_t thread, void **value_ptr)
61 {
62 ASSERT_PTHREAD(pthread_join, thread, value_ptr);
63 }
64
strict_pthread_mutex_init(pthread_mutex_t * mutex,const pthread_mutexattr_t * attr)65 static inline int strict_pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
66 {
67 if (attr) {
68 ASSERT_PTHREAD_NORET(pthread_mutex_init, mutex, attr);
69 } else {
70 pthread_mutexattr_t local_attr;
71 ASSERT_PTHREAD_NORET(pthread_mutexattr_init, &local_attr);
72 ASSERT_PTHREAD_NORET(pthread_mutexattr_settype, &local_attr, PTHREAD_MUTEX_ERRORCHECK);
73 ASSERT_PTHREAD_NORET(pthread_mutex_init, mutex, &local_attr);
74 ASSERT_PTHREAD_NORET(pthread_mutexattr_destroy, &local_attr);
75 }
76 return 0;
77 }
78
strict_pthread_mutex_destroy(pthread_mutex_t * mutex)79 static inline int strict_pthread_mutex_destroy(pthread_mutex_t *mutex)
80 {
81 ASSERT_PTHREAD(pthread_mutex_destroy, mutex);
82 }
83
strict_pthread_mutex_lock(pthread_mutex_t * mutex)84 static inline int strict_pthread_mutex_lock(pthread_mutex_t *mutex)
85 {
86 ASSERT_PTHREAD(pthread_mutex_lock, mutex);
87 }
88
strict_pthread_mutex_unlock(pthread_mutex_t * mutex)89 static inline int strict_pthread_mutex_unlock(pthread_mutex_t *mutex)
90 {
91 ASSERT_PTHREAD(pthread_mutex_unlock, mutex);
92 }
93
strict_pthread_cond_init(pthread_cond_t * cond,const pthread_condattr_t * attr)94 static inline int strict_pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
95 {
96 ASSERT_PTHREAD(pthread_cond_init, cond, attr);
97 }
98
strict_pthread_cond_destroy(pthread_cond_t * cond)99 static inline int strict_pthread_cond_destroy(pthread_cond_t *cond)
100 {
101 ASSERT_PTHREAD(pthread_cond_destroy, cond);
102 }
103
strict_pthread_cond_signal(pthread_cond_t * cond)104 static inline int strict_pthread_cond_signal(pthread_cond_t *cond)
105 {
106 ASSERT_PTHREAD(pthread_cond_signal, cond);
107 }
108
strict_pthread_cond_broadcast(pthread_cond_t * cond)109 static inline int strict_pthread_cond_broadcast(pthread_cond_t *cond)
110 {
111 ASSERT_PTHREAD(pthread_cond_broadcast, cond);
112 }
113
strict_pthread_cond_wait(pthread_cond_t * cond,pthread_mutex_t * mutex)114 static inline int strict_pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
115 {
116 ASSERT_PTHREAD(pthread_cond_wait, cond, mutex);
117 }
118
strict_pthread_cond_timedwait(pthread_cond_t * cond,pthread_mutex_t * mutex,const struct timespec * abstime)119 static inline int strict_pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex,
120 const struct timespec *abstime)
121 {
122 int ret = pthread_cond_timedwait(cond, mutex, abstime);
123 if (ret && ret != ETIMEDOUT)
124 ASSERT_PTHREAD_ABORT(pthread_cond_timedwait, ret);
125 return ret;
126 }
127
strict_pthread_once(pthread_once_t * once_control,void (* init_routine)(void))128 static inline int strict_pthread_once(pthread_once_t *once_control, void (*init_routine)(void))
129 {
130 ASSERT_PTHREAD(pthread_once, once_control, init_routine);
131 }
132
133 #define pthread_join strict_pthread_join
134 #define pthread_mutex_init strict_pthread_mutex_init
135 #define pthread_mutex_destroy strict_pthread_mutex_destroy
136 #define pthread_mutex_lock strict_pthread_mutex_lock
137 #define pthread_mutex_unlock strict_pthread_mutex_unlock
138 #define pthread_cond_init strict_pthread_cond_init
139 #define pthread_cond_destroy strict_pthread_cond_destroy
140 #define pthread_cond_signal strict_pthread_cond_signal
141 #define pthread_cond_broadcast strict_pthread_cond_broadcast
142 #define pthread_cond_wait strict_pthread_cond_wait
143 #define pthread_cond_timedwait strict_pthread_cond_timedwait
144 #define pthread_once strict_pthread_once
145 #endif
146
147 #elif HAVE_OS2THREADS
148 #include "compat/os2threads.h"
149 #else
150 #include "compat/w32pthreads.h"
151 #endif
152
153 #define AVMutex pthread_mutex_t
154 #define AV_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
155
156 #define ff_mutex_init pthread_mutex_init
157 #define ff_mutex_lock pthread_mutex_lock
158 #define ff_mutex_unlock pthread_mutex_unlock
159 #define ff_mutex_destroy pthread_mutex_destroy
160
161 #define AVOnce pthread_once_t
162 #define AV_ONCE_INIT PTHREAD_ONCE_INIT
163
164 #define ff_thread_once(control, routine) pthread_once(control, routine)
165
166 #else
167
168 #define AVMutex char
169 #define AV_MUTEX_INITIALIZER 0
170
ff_mutex_init(AVMutex * mutex,const void * attr)171 static inline int ff_mutex_init(AVMutex *mutex, const void *attr){ return 0; }
ff_mutex_lock(AVMutex * mutex)172 static inline int ff_mutex_lock(AVMutex *mutex){ return 0; }
ff_mutex_unlock(AVMutex * mutex)173 static inline int ff_mutex_unlock(AVMutex *mutex){ return 0; }
ff_mutex_destroy(AVMutex * mutex)174 static inline int ff_mutex_destroy(AVMutex *mutex){ return 0; }
175
176 #define AVOnce char
177 #define AV_ONCE_INIT 0
178
ff_thread_once(char * control,void (* routine)(void))179 static inline int ff_thread_once(char *control, void (*routine)(void))
180 {
181 if (!*control) {
182 routine();
183 *control = 1;
184 }
185 return 0;
186 }
187
188 #endif
189
190 #endif /* AVUTIL_THREAD_H */
191