yading@10: /*
yading@10:  * Copyright (c) 2011 KO Myung-Hun <komh@chollian.net>
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * os2threads to pthreads wrapper
yading@10:  */
yading@10: 
yading@10: #ifndef AVCODEC_OS2PTHREADS_H
yading@10: #define AVCODEC_OS2PTHREADS_H
yading@10: 
yading@10: #define INCL_DOS
yading@10: #include <os2.h>
yading@10: 
yading@10: #undef __STRICT_ANSI__          /* for _beginthread() */
yading@10: #include <stdlib.h>
yading@10: 
yading@10: typedef TID  pthread_t;
yading@10: typedef void pthread_attr_t;
yading@10: 
yading@10: typedef HMTX pthread_mutex_t;
yading@10: typedef void pthread_mutexattr_t;
yading@10: 
yading@10: typedef struct {
yading@10:     HEV  event_sem;
yading@10:     int  wait_count;
yading@10: } pthread_cond_t;
yading@10: 
yading@10: typedef void pthread_condattr_t;
yading@10: 
yading@10: struct thread_arg {
yading@10:     void *(*start_routine)(void *);
yading@10:     void *arg;
yading@10: };
yading@10: 
yading@10: static void thread_entry(void *arg)
yading@10: {
yading@10:     struct thread_arg *thread_arg = arg;
yading@10: 
yading@10:     thread_arg->start_routine(thread_arg->arg);
yading@10: 
yading@10:     av_free(thread_arg);
yading@10: }
yading@10: 
yading@10: static av_always_inline int pthread_create(pthread_t *thread, const pthread_attr_t *attr, void *(*start_routine)(void*), void *arg)
yading@10: {
yading@10:     struct thread_arg *thread_arg;
yading@10: 
yading@10:     thread_arg = av_mallocz(sizeof(struct thread_arg));
yading@10: 
yading@10:     thread_arg->start_routine = start_routine;
yading@10:     thread_arg->arg = arg;
yading@10: 
yading@10:     *thread = _beginthread(thread_entry, NULL, 256 * 1024, thread_arg);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_always_inline int pthread_join(pthread_t thread, void **value_ptr)
yading@10: {
yading@10:     DosWaitThread((PTID)&thread, DCWW_WAIT);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_always_inline int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
yading@10: {
yading@10:     DosCreateMutexSem(NULL, (PHMTX)mutex, 0, FALSE);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_always_inline int pthread_mutex_destroy(pthread_mutex_t *mutex)
yading@10: {
yading@10:     DosCloseMutexSem(*(PHMTX)mutex);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_always_inline int pthread_mutex_lock(pthread_mutex_t *mutex)
yading@10: {
yading@10:     DosRequestMutexSem(*(PHMTX)mutex, SEM_INDEFINITE_WAIT);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_always_inline int pthread_mutex_unlock(pthread_mutex_t *mutex)
yading@10: {
yading@10:     DosReleaseMutexSem(*(PHMTX)mutex);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_always_inline int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
yading@10: {
yading@10:     DosCreateEventSem(NULL, &cond->event_sem, DCE_POSTONE, FALSE);
yading@10: 
yading@10:     cond->wait_count = 0;
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_always_inline int pthread_cond_destroy(pthread_cond_t *cond)
yading@10: {
yading@10:     DosCloseEventSem(cond->event_sem);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_always_inline int pthread_cond_signal(pthread_cond_t *cond)
yading@10: {
yading@10:     if (cond->wait_count > 0) {
yading@10:         DosPostEventSem(cond->event_sem);
yading@10: 
yading@10:         cond->wait_count--;
yading@10:     }
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_always_inline int pthread_cond_broadcast(pthread_cond_t *cond)
yading@10: {
yading@10:     while (cond->wait_count > 0) {
yading@10:         DosPostEventSem(cond->event_sem);
yading@10: 
yading@10:         cond->wait_count--;
yading@10:     }
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_always_inline int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
yading@10: {
yading@10:     cond->wait_count++;
yading@10: 
yading@10:     pthread_mutex_unlock(mutex);
yading@10: 
yading@10:     DosWaitEventSem(cond->event_sem, SEM_INDEFINITE_WAIT);
yading@10: 
yading@10:     pthread_mutex_lock(mutex);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: #endif /* AVCODEC_OS2PTHREADS_H */