path: root/libavutil/thread.h (plain)
blob: 6e5744736becb5956faba3de47b2152bb13f5182

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	av_log(NULL, AV_LOG_FATAL, AV_STRINGIFY(func) \
40	" failed with error: %s\n", av_err2str(AVERROR(ret))); \
41	abort(); \
42	} \
43	} while (0)
44
45	#define ASSERT_PTHREAD(func, ...) do { \
46	ASSERT_PTHREAD_NORET(func, __VA_ARGS__); \
47	return 0; \
48	} while (0)
49
50	static inline int strict_pthread_join(pthread_t thread, void **value_ptr)
51	{
52	ASSERT_PTHREAD(pthread_join, thread, value_ptr);
53	}
54
55	static inline int strict_pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
56	{
57	if (attr) {
58	ASSERT_PTHREAD_NORET(pthread_mutex_init, mutex, attr);
59	} else {
60	pthread_mutexattr_t local_attr;
61	ASSERT_PTHREAD_NORET(pthread_mutexattr_init, &local_attr);
62	ASSERT_PTHREAD_NORET(pthread_mutexattr_settype, &local_attr, PTHREAD_MUTEX_ERRORCHECK);
63	ASSERT_PTHREAD_NORET(pthread_mutex_init, mutex, &local_attr);
64	ASSERT_PTHREAD_NORET(pthread_mutexattr_destroy, &local_attr);
65	}
66	return 0;
67	}
68
69	static inline int strict_pthread_mutex_destroy(pthread_mutex_t *mutex)
70	{
71	ASSERT_PTHREAD(pthread_mutex_destroy, mutex);
72	}
73
74	static inline int strict_pthread_mutex_lock(pthread_mutex_t *mutex)
75	{
76	ASSERT_PTHREAD(pthread_mutex_lock, mutex);
77	}
78
79	static inline int strict_pthread_mutex_unlock(pthread_mutex_t *mutex)
80	{
81	ASSERT_PTHREAD(pthread_mutex_unlock, mutex);
82	}
83
84	static inline int strict_pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
85	{
86	ASSERT_PTHREAD(pthread_cond_init, cond, attr);
87	}
88
89	static inline int strict_pthread_cond_destroy(pthread_cond_t *cond)
90	{
91	ASSERT_PTHREAD(pthread_cond_destroy, cond);
92	}
93
94	static inline int strict_pthread_cond_signal(pthread_cond_t *cond)
95	{
96	ASSERT_PTHREAD(pthread_cond_signal, cond);
97	}
98
99	static inline int strict_pthread_cond_broadcast(pthread_cond_t *cond)
100	{
101	ASSERT_PTHREAD(pthread_cond_broadcast, cond);
102	}
103
104	static inline int strict_pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
105	{
106	ASSERT_PTHREAD(pthread_cond_wait, cond, mutex);
107	}
108
109	static inline int strict_pthread_once(pthread_once_t *once_control, void (*init_routine)(void))
110	{
111	ASSERT_PTHREAD(pthread_once, once_control, init_routine);
112	}
113
114	#define pthread_join strict_pthread_join
115	#define pthread_mutex_init strict_pthread_mutex_init
116	#define pthread_mutex_destroy strict_pthread_mutex_destroy
117	#define pthread_mutex_lock strict_pthread_mutex_lock
118	#define pthread_mutex_unlock strict_pthread_mutex_unlock
119	#define pthread_cond_init strict_pthread_cond_init
120	#define pthread_cond_destroy strict_pthread_cond_destroy
121	#define pthread_cond_signal strict_pthread_cond_signal
122	#define pthread_cond_broadcast strict_pthread_cond_broadcast
123	#define pthread_cond_wait strict_pthread_cond_wait
124	#define pthread_once strict_pthread_once
125	#endif
126
127	#elif HAVE_OS2THREADS
128	#include "compat/os2threads.h"
129	#else
130	#include "compat/w32pthreads.h"
131	#endif
132
133	#define AVMutex pthread_mutex_t
134
135	#define ff_mutex_init pthread_mutex_init
136	#define ff_mutex_lock pthread_mutex_lock
137	#define ff_mutex_unlock pthread_mutex_unlock
138	#define ff_mutex_destroy pthread_mutex_destroy
139
140	#define AVOnce pthread_once_t
141	#define AV_ONCE_INIT PTHREAD_ONCE_INIT
142
143	#define ff_thread_once(control, routine) pthread_once(control, routine)
144
145	#else
146
147	#define AVMutex char
148
149	#define ff_mutex_init(mutex, attr) (0)
150	#define ff_mutex_lock(mutex) (0)
151	#define ff_mutex_unlock(mutex) (0)
152	#define ff_mutex_destroy(mutex) (0)
153
154	#define AVOnce char
155	#define AV_ONCE_INIT 0
156
157	static inline int ff_thread_once(char *control, void (*routine)(void))
158	{
159	if (!*control) {
160	routine();
161	*control = 1;
162	}
163	return 0;
164	}
165
166	#endif
167
168	#endif /* AVUTIL_THREAD_H */
169