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