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- /*
- * Copyright (c) 2011 KO Myung-Hun <komh@chollian.net>
- *
- * 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
- */
- /**
- * @file
- * os2threads to pthreads wrapper
- */
- #ifndef AVCODEC_OS2PTHREADS_H
- #define AVCODEC_OS2PTHREADS_H
- #define INCL_DOS
- #include <os2.h>
- #undef __STRICT_ANSI__ /* for _beginthread() */
- #include <stdlib.h>
- #include "libavutil/mem.h"
- typedef TID pthread_t;
- typedef void pthread_attr_t;
- typedef HMTX pthread_mutex_t;
- typedef void pthread_mutexattr_t;
- typedef struct {
- HEV event_sem;
- int wait_count;
- } pthread_cond_t;
- typedef void pthread_condattr_t;
- struct thread_arg {
- void *(*start_routine)(void *);
- void *arg;
- };
- static void thread_entry(void *arg)
- {
- struct thread_arg *thread_arg = arg;
- thread_arg->start_routine(thread_arg->arg);
- av_free(thread_arg);
- }
- static av_always_inline int pthread_create(pthread_t *thread, const pthread_attr_t *attr, void *(*start_routine)(void*), void *arg)
- {
- struct thread_arg *thread_arg;
- thread_arg = av_mallocz(sizeof(struct thread_arg));
- thread_arg->start_routine = start_routine;
- thread_arg->arg = arg;
- *thread = _beginthread(thread_entry, NULL, 256 * 1024, thread_arg);
- return 0;
- }
- static av_always_inline int pthread_join(pthread_t thread, void **value_ptr)
- {
- DosWaitThread((PTID)&thread, DCWW_WAIT);
- return 0;
- }
- static av_always_inline int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
- {
- DosCreateMutexSem(NULL, (PHMTX)mutex, 0, FALSE);
- return 0;
- }
- static av_always_inline int pthread_mutex_destroy(pthread_mutex_t *mutex)
- {
- DosCloseMutexSem(*(PHMTX)mutex);
- return 0;
- }
- static av_always_inline int pthread_mutex_lock(pthread_mutex_t *mutex)
- {
- DosRequestMutexSem(*(PHMTX)mutex, SEM_INDEFINITE_WAIT);
- return 0;
- }
- static av_always_inline int pthread_mutex_unlock(pthread_mutex_t *mutex)
- {
- DosReleaseMutexSem(*(PHMTX)mutex);
- return 0;
- }
- static av_always_inline int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
- {
- DosCreateEventSem(NULL, &cond->event_sem, DCE_POSTONE, FALSE);
- cond->wait_count = 0;
- return 0;
- }
- static av_always_inline int pthread_cond_destroy(pthread_cond_t *cond)
- {
- DosCloseEventSem(cond->event_sem);
- return 0;
- }
- static av_always_inline int pthread_cond_signal(pthread_cond_t *cond)
- {
- if (cond->wait_count > 0) {
- DosPostEventSem(cond->event_sem);
- cond->wait_count--;
- }
- return 0;
- }
- static av_always_inline int pthread_cond_broadcast(pthread_cond_t *cond)
- {
- while (cond->wait_count > 0) {
- DosPostEventSem(cond->event_sem);
- cond->wait_count--;
- }
- return 0;
- }
- static av_always_inline int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
- {
- cond->wait_count++;
- pthread_mutex_unlock(mutex);
- DosWaitEventSem(cond->event_sem, SEM_INDEFINITE_WAIT);
- pthread_mutex_lock(mutex);
- return 0;
- }
- #endif /* AVCODEC_OS2PTHREADS_H */
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