/* * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ // This header should only be used to simplify code where// threading is optional, not as a generic threading abstraction. #ifndef AVUTIL_THREAD_H#define AVUTIL_THREAD_H #include "config.h" #if HAVE_PTHREADS || HAVE_W32THREADS || HAVE_OS2THREADS #define USE_ATOMICS 0 #if HAVE_PTHREADS#include <pthread.h> #if defined(ASSERT_LEVEL) && ASSERT_LEVEL > 1 #include "log.h" #define ASSERT_PTHREAD_NORET(func, ...) do {                            \    int ret = func(__VA_ARGS__);                                        \    if (ret) {                                                          \        av_log(NULL, AV_LOG_FATAL, AV_STRINGIFY(func)                   \               " failed with error: %s\n", av_err2str(AVERROR(ret)));   \        abort();                                                        \    }                                                                   \} while (0) #define ASSERT_PTHREAD(func, ...) do {                                  \    ASSERT_PTHREAD_NORET(func, __VA_ARGS__);                            \    return 0;                                                           \} while (0) static inline int strict_pthread_join(pthread_t thread, void **value_ptr){    ASSERT_PTHREAD(pthread_join, thread, value_ptr);} static inline int strict_pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr){    if (attr) {        ASSERT_PTHREAD_NORET(pthread_mutex_init, mutex, attr);    } else {        pthread_mutexattr_t local_attr;        ASSERT_PTHREAD_NORET(pthread_mutexattr_init, &local_attr);        ASSERT_PTHREAD_NORET(pthread_mutexattr_settype, &local_attr, PTHREAD_MUTEX_ERRORCHECK);        ASSERT_PTHREAD_NORET(pthread_mutex_init, mutex, &local_attr);        ASSERT_PTHREAD_NORET(pthread_mutexattr_destroy, &local_attr);    }    return 0;} static inline int strict_pthread_mutex_destroy(pthread_mutex_t *mutex){    ASSERT_PTHREAD(pthread_mutex_destroy, mutex);} static inline int strict_pthread_mutex_lock(pthread_mutex_t *mutex){    ASSERT_PTHREAD(pthread_mutex_lock, mutex);} static inline int strict_pthread_mutex_unlock(pthread_mutex_t *mutex){    ASSERT_PTHREAD(pthread_mutex_unlock, mutex);} static inline int strict_pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr){    ASSERT_PTHREAD(pthread_cond_init, cond, attr);} static inline int strict_pthread_cond_destroy(pthread_cond_t *cond){    ASSERT_PTHREAD(pthread_cond_destroy, cond);} static inline int strict_pthread_cond_signal(pthread_cond_t *cond){    ASSERT_PTHREAD(pthread_cond_signal, cond);} static inline int strict_pthread_cond_broadcast(pthread_cond_t *cond){    ASSERT_PTHREAD(pthread_cond_broadcast, cond);} static inline int strict_pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex){    ASSERT_PTHREAD(pthread_cond_wait, cond, mutex);} static inline int strict_pthread_once(pthread_once_t *once_control, void (*init_routine)(void)){    ASSERT_PTHREAD(pthread_once, once_control, init_routine);} #define pthread_join           strict_pthread_join#define pthread_mutex_init     strict_pthread_mutex_init#define pthread_mutex_destroy  strict_pthread_mutex_destroy#define pthread_mutex_lock     strict_pthread_mutex_lock#define pthread_mutex_unlock   strict_pthread_mutex_unlock#define pthread_cond_init      strict_pthread_cond_init#define pthread_cond_destroy   strict_pthread_cond_destroy#define pthread_cond_signal    strict_pthread_cond_signal#define pthread_cond_broadcast strict_pthread_cond_broadcast#define pthread_cond_wait      strict_pthread_cond_wait#define pthread_once           strict_pthread_once#endif #elif HAVE_OS2THREADS#include "compat/os2threads.h"#else#include "compat/w32pthreads.h"#endif #define AVMutex pthread_mutex_t #define ff_mutex_init    pthread_mutex_init#define ff_mutex_lock    pthread_mutex_lock#define ff_mutex_unlock  pthread_mutex_unlock#define ff_mutex_destroy pthread_mutex_destroy #define AVOnce pthread_once_t#define AV_ONCE_INIT PTHREAD_ONCE_INIT #define ff_thread_once(control, routine) pthread_once(control, routine) #else #define USE_ATOMICS 1 #define AVMutex char #define ff_mutex_init(mutex, attr) (0)#define ff_mutex_lock(mutex) (0)#define ff_mutex_unlock(mutex) (0)#define ff_mutex_destroy(mutex) (0) #define AVOnce char#define AV_ONCE_INIT 0 static inline int ff_thread_once(char *control, void (*routine)(void)){    if (!*control) {        routine();        *control = 1;    }    return 0;} #endif #endif /* AVUTIL_THREAD_H */