1/*
2 * Copyright (c) 2011 KO Myung-Hun <komh@chollian.net>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21/**
22 * @file
23 * os2threads to pthreads wrapper
24 */
25
26#ifndef AVCODEC_OS2PTHREADS_H
27#define AVCODEC_OS2PTHREADS_H
28
29#define INCL_DOS
30#include <os2.h>
31
32#undef __STRICT_ANSI__          /* for _beginthread() */
33#include <stdlib.h>
34
35#include "libavutil/mem.h"
36
37typedef TID  pthread_t;
38typedef void pthread_attr_t;
39
40typedef HMTX pthread_mutex_t;
41typedef void pthread_mutexattr_t;
42
43typedef struct {
44    HEV  event_sem;
45    int  wait_count;
46} pthread_cond_t;
47
48typedef void pthread_condattr_t;
49
50struct thread_arg {
51    void *(*start_routine)(void *);
52    void *arg;
53};
54
55static void thread_entry(void *arg)
56{
57    struct thread_arg *thread_arg = arg;
58
59    thread_arg->start_routine(thread_arg->arg);
60
61    av_free(thread_arg);
62}
63
64static av_always_inline int pthread_create(pthread_t *thread, const pthread_attr_t *attr, void *(*start_routine)(void*), void *arg)
65{
66    struct thread_arg *thread_arg;
67
68    thread_arg = av_mallocz(sizeof(struct thread_arg));
69
70    thread_arg->start_routine = start_routine;
71    thread_arg->arg = arg;
72
73    *thread = _beginthread(thread_entry, NULL, 256 * 1024, thread_arg);
74
75    return 0;
76}
77
78static av_always_inline int pthread_join(pthread_t thread, void **value_ptr)
79{
80    DosWaitThread((PTID)&thread, DCWW_WAIT);
81
82    return 0;
83}
84
85static av_always_inline int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
86{
87    DosCreateMutexSem(NULL, (PHMTX)mutex, 0, FALSE);
88
89    return 0;
90}
91
92static av_always_inline int pthread_mutex_destroy(pthread_mutex_t *mutex)
93{
94    DosCloseMutexSem(*(PHMTX)mutex);
95
96    return 0;
97}
98
99static av_always_inline int pthread_mutex_lock(pthread_mutex_t *mutex)
100{
101    DosRequestMutexSem(*(PHMTX)mutex, SEM_INDEFINITE_WAIT);
102
103    return 0;
104}
105
106static av_always_inline int pthread_mutex_unlock(pthread_mutex_t *mutex)
107{
108    DosReleaseMutexSem(*(PHMTX)mutex);
109
110    return 0;
111}
112
113static av_always_inline int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
114{
115    DosCreateEventSem(NULL, &cond->event_sem, DCE_POSTONE, FALSE);
116
117    cond->wait_count = 0;
118
119    return 0;
120}
121
122static av_always_inline int pthread_cond_destroy(pthread_cond_t *cond)
123{
124    DosCloseEventSem(cond->event_sem);
125
126    return 0;
127}
128
129static av_always_inline int pthread_cond_signal(pthread_cond_t *cond)
130{
131    if (cond->wait_count > 0) {
132        DosPostEventSem(cond->event_sem);
133
134        cond->wait_count--;
135    }
136
137    return 0;
138}
139
140static av_always_inline int pthread_cond_broadcast(pthread_cond_t *cond)
141{
142    while (cond->wait_count > 0) {
143        DosPostEventSem(cond->event_sem);
144
145        cond->wait_count--;
146    }
147
148    return 0;
149}
150
151static av_always_inline int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
152{
153    cond->wait_count++;
154
155    pthread_mutex_unlock(mutex);
156
157    DosWaitEventSem(cond->event_sem, SEM_INDEFINITE_WAIT);
158
159    pthread_mutex_lock(mutex);
160
161    return 0;
162}
163
164#endif /* AVCODEC_OS2PTHREADS_H */
165