thread.h (7758B)
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_PRCTL 28 #include <sys/prctl.h> 29 #elif (HAVE_PTHREAD_SETNAME_NP || HAVE_PTHREAD_SET_NAME_NP) && HAVE_PTHREAD_NP_H 30 #include <pthread_np.h> 31 #endif 32 33 #include "error.h" 34 35 #if HAVE_PTHREADS || HAVE_W32THREADS || HAVE_OS2THREADS 36 37 #if HAVE_PTHREADS 38 #include <pthread.h> 39 40 #if defined(ASSERT_LEVEL) && ASSERT_LEVEL > 1 41 42 #include <stdlib.h> 43 44 #include "log.h" 45 #include "macros.h" 46 47 #define ASSERT_PTHREAD_ABORT(func, ret) do { \ 48 char errbuf[AV_ERROR_MAX_STRING_SIZE] = ""; \ 49 av_log(NULL, AV_LOG_FATAL, AV_STRINGIFY(func) \ 50 " failed with error: %s\n", \ 51 av_make_error_string(errbuf, AV_ERROR_MAX_STRING_SIZE, \ 52 AVERROR(ret))); \ 53 abort(); \ 54 } while (0) 55 56 #define ASSERT_PTHREAD_NORET(func, ...) do { \ 57 int ret = func(__VA_ARGS__); \ 58 if (ret) \ 59 ASSERT_PTHREAD_ABORT(func, ret); \ 60 } while (0) 61 62 #define ASSERT_PTHREAD(func, ...) do { \ 63 ASSERT_PTHREAD_NORET(func, __VA_ARGS__); \ 64 return 0; \ 65 } while (0) 66 67 static inline int strict_pthread_join(pthread_t thread, void **value_ptr) 68 { 69 ASSERT_PTHREAD(pthread_join, thread, value_ptr); 70 } 71 72 static inline int strict_pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr) 73 { 74 if (attr) { 75 ASSERT_PTHREAD_NORET(pthread_mutex_init, mutex, attr); 76 } else { 77 pthread_mutexattr_t local_attr; 78 ASSERT_PTHREAD_NORET(pthread_mutexattr_init, &local_attr); 79 ASSERT_PTHREAD_NORET(pthread_mutexattr_settype, &local_attr, PTHREAD_MUTEX_ERRORCHECK); 80 ASSERT_PTHREAD_NORET(pthread_mutex_init, mutex, &local_attr); 81 ASSERT_PTHREAD_NORET(pthread_mutexattr_destroy, &local_attr); 82 } 83 return 0; 84 } 85 86 static inline int strict_pthread_mutex_destroy(pthread_mutex_t *mutex) 87 { 88 ASSERT_PTHREAD(pthread_mutex_destroy, mutex); 89 } 90 91 static inline int strict_pthread_mutex_lock(pthread_mutex_t *mutex) 92 { 93 ASSERT_PTHREAD(pthread_mutex_lock, mutex); 94 } 95 96 static inline int strict_pthread_mutex_unlock(pthread_mutex_t *mutex) 97 { 98 ASSERT_PTHREAD(pthread_mutex_unlock, mutex); 99 } 100 101 static inline int strict_pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr) 102 { 103 ASSERT_PTHREAD(pthread_cond_init, cond, attr); 104 } 105 106 static inline int strict_pthread_cond_destroy(pthread_cond_t *cond) 107 { 108 ASSERT_PTHREAD(pthread_cond_destroy, cond); 109 } 110 111 static inline int strict_pthread_cond_signal(pthread_cond_t *cond) 112 { 113 ASSERT_PTHREAD(pthread_cond_signal, cond); 114 } 115 116 static inline int strict_pthread_cond_broadcast(pthread_cond_t *cond) 117 { 118 ASSERT_PTHREAD(pthread_cond_broadcast, cond); 119 } 120 121 static inline int strict_pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex) 122 { 123 ASSERT_PTHREAD(pthread_cond_wait, cond, mutex); 124 } 125 126 static inline int strict_pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex, 127 const struct timespec *abstime) 128 { 129 int ret = pthread_cond_timedwait(cond, mutex, abstime); 130 if (ret && ret != ETIMEDOUT) 131 ASSERT_PTHREAD_ABORT(pthread_cond_timedwait, ret); 132 return ret; 133 } 134 135 static inline int strict_pthread_once(pthread_once_t *once_control, void (*init_routine)(void)) 136 { 137 ASSERT_PTHREAD(pthread_once, once_control, init_routine); 138 } 139 140 #define pthread_join strict_pthread_join 141 #define pthread_mutex_init strict_pthread_mutex_init 142 #define pthread_mutex_destroy strict_pthread_mutex_destroy 143 #define pthread_mutex_lock strict_pthread_mutex_lock 144 #define pthread_mutex_unlock strict_pthread_mutex_unlock 145 #define pthread_cond_init strict_pthread_cond_init 146 #define pthread_cond_destroy strict_pthread_cond_destroy 147 #define pthread_cond_signal strict_pthread_cond_signal 148 #define pthread_cond_broadcast strict_pthread_cond_broadcast 149 #define pthread_cond_wait strict_pthread_cond_wait 150 #define pthread_cond_timedwait strict_pthread_cond_timedwait 151 #define pthread_once strict_pthread_once 152 #endif 153 154 #elif HAVE_OS2THREADS 155 #include "compat/os2threads.h" 156 #else 157 #include "compat/w32pthreads.h" 158 #endif 159 160 #define AVMutex pthread_mutex_t 161 #define AV_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER 162 163 #define ff_mutex_init pthread_mutex_init 164 #define ff_mutex_lock pthread_mutex_lock 165 #define ff_mutex_unlock pthread_mutex_unlock 166 #define ff_mutex_destroy pthread_mutex_destroy 167 168 #define AVCond pthread_cond_t 169 170 #define ff_cond_init pthread_cond_init 171 #define ff_cond_destroy pthread_cond_destroy 172 #define ff_cond_signal pthread_cond_signal 173 #define ff_cond_broadcast pthread_cond_broadcast 174 #define ff_cond_wait pthread_cond_wait 175 #define ff_cond_timedwait pthread_cond_timedwait 176 177 #define AVOnce pthread_once_t 178 #define AV_ONCE_INIT PTHREAD_ONCE_INIT 179 180 #define ff_thread_once(control, routine) pthread_once(control, routine) 181 182 #else 183 184 #define AVMutex char 185 #define AV_MUTEX_INITIALIZER 0 186 187 static inline int ff_mutex_init(AVMutex *mutex, const void *attr){ return 0; } 188 static inline int ff_mutex_lock(AVMutex *mutex){ return 0; } 189 static inline int ff_mutex_unlock(AVMutex *mutex){ return 0; } 190 static inline int ff_mutex_destroy(AVMutex *mutex){ return 0; } 191 192 #define AVCond char 193 194 static inline int ff_cond_init(AVCond *cond, const void *attr){ return 0; } 195 static inline int ff_cond_destroy(AVCond *cond){ return 0; } 196 static inline int ff_cond_signal(AVCond *cond){ return 0; } 197 static inline int ff_cond_broadcast(AVCond *cond){ return 0; } 198 static inline int ff_cond_wait(AVCond *cond, AVMutex *mutex){ return 0; } 199 static inline int ff_cond_timedwait(AVCond *cond, AVMutex *mutex, 200 const void *abstime){ return 0; } 201 202 #define AVOnce char 203 #define AV_ONCE_INIT 0 204 205 static inline int ff_thread_once(char *control, void (*routine)(void)) 206 { 207 if (!*control) { 208 routine(); 209 *control = 1; 210 } 211 return 0; 212 } 213 214 #endif 215 216 static inline int ff_thread_setname(const char *name) 217 { 218 int ret = 0; 219 220 #if HAVE_PRCTL 221 ret = AVERROR(prctl(PR_SET_NAME, name)); 222 #elif HAVE_PTHREAD_SETNAME_NP 223 #if defined(__APPLE__) 224 ret = AVERROR(pthread_setname_np(name)); 225 #elif defined(__NetBSD__) 226 ret = AVERROR(pthread_setname_np(pthread_self(), "%s", name)); 227 #else 228 ret = AVERROR(pthread_setname_np(pthread_self(), name)); 229 #endif 230 #elif HAVE_PTHREAD_SET_NAME_NP 231 pthread_set_name_np(pthread_self(), name); 232 #else 233 ret = AVERROR(ENOSYS); 234 #endif 235 236 return ret; 237 } 238 239 #endif /* AVUTIL_THREAD_H */