1 /*****************************************************************************
2 * vlc_threads.h : threads implementation for the VideoLAN client
3 * This header provides portable declarations for mutexes & conditions
4 *****************************************************************************
5 * Copyright (C) 1999, 2002 the VideoLAN team
8 * Authors: Jean-Marc Dressler <polux@via.ecp.fr>
9 * Samuel Hocevar <sam@via.ecp.fr>
10 * Gildas Bazin <gbazin@netcourrier.com>
11 * Christophe Massiot <massiot@via.ecp.fr>
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
26 *****************************************************************************/
28 #if !defined( __LIBVLC__ )
29 #error You are not libvlc or one of its plugins. You cannot include this file
32 #ifndef _VLC_THREADS_H_
33 #define _VLC_THREADS_H_
37 #if defined(DEBUG) && defined(HAVE_SYS_TIME_H)
38 # include <sys/time.h>
41 #if defined( PTH_INIT_IN_PTH_H ) /* GNU Pth */
44 #elif defined( ST_INIT_IN_ST_H ) /* State threads */
47 #elif defined( UNDER_CE )
49 #elif defined( WIN32 )
50 # include <process.h> /* Win32 API */
52 #elif defined( HAVE_KERNEL_SCHEDULER_H ) /* BeOS */
53 # include <kernel/OS.h>
54 # include <kernel/scheduler.h>
55 # include <byteorder.h>
57 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) /* pthreads (like Linux & BSD) */
58 # define LIBVLC_USE_PTHREAD 1
62 /* Needed for pthread_cond_timedwait */
65 /* This is not prototyped under Linux, though it exists. */
66 int pthread_mutexattr_setkind_np( pthread_mutexattr_t *attr, int kind );
68 #elif defined( HAVE_CTHREADS_H ) /* GNUMach */
69 # include <cthreads.h>
72 # error no threads available on your system !
76 /*****************************************************************************
78 *****************************************************************************/
80 /* Thread priorities */
82 # define VLC_THREAD_PRIORITY_LOW (-47)
83 # define VLC_THREAD_PRIORITY_INPUT 37
84 # define VLC_THREAD_PRIORITY_AUDIO 37
85 # define VLC_THREAD_PRIORITY_VIDEO (-47)
86 # define VLC_THREAD_PRIORITY_OUTPUT 37
87 # define VLC_THREAD_PRIORITY_HIGHEST 37
89 #elif defined(SYS_BEOS)
90 # define VLC_THREAD_PRIORITY_LOW 5
91 # define VLC_THREAD_PRIORITY_INPUT 10
92 # define VLC_THREAD_PRIORITY_AUDIO 10
93 # define VLC_THREAD_PRIORITY_VIDEO 5
94 # define VLC_THREAD_PRIORITY_OUTPUT 15
95 # define VLC_THREAD_PRIORITY_HIGHEST 15
97 #elif defined(PTHREAD_COND_T_IN_PTHREAD_H)
98 # define VLC_THREAD_PRIORITY_LOW 0
99 # define VLC_THREAD_PRIORITY_INPUT 20
100 # define VLC_THREAD_PRIORITY_AUDIO 10
101 # define VLC_THREAD_PRIORITY_VIDEO 0
102 # define VLC_THREAD_PRIORITY_OUTPUT 30
103 # define VLC_THREAD_PRIORITY_HIGHEST 40
105 #elif defined(WIN32) || defined(UNDER_CE)
106 /* Define different priorities for WinNT/2K/XP and Win9x/Me */
107 # define VLC_THREAD_PRIORITY_LOW 0
108 # define VLC_THREAD_PRIORITY_INPUT \
109 (IS_WINNT ? THREAD_PRIORITY_ABOVE_NORMAL : 0)
110 # define VLC_THREAD_PRIORITY_AUDIO \
111 (IS_WINNT ? THREAD_PRIORITY_HIGHEST : 0)
112 # define VLC_THREAD_PRIORITY_VIDEO \
113 (IS_WINNT ? 0 : THREAD_PRIORITY_BELOW_NORMAL )
114 # define VLC_THREAD_PRIORITY_OUTPUT \
115 (IS_WINNT ? THREAD_PRIORITY_ABOVE_NORMAL : 0)
116 # define VLC_THREAD_PRIORITY_HIGHEST \
117 (IS_WINNT ? THREAD_PRIORITY_TIME_CRITICAL : 0)
120 # define VLC_THREAD_PRIORITY_LOW 0
121 # define VLC_THREAD_PRIORITY_INPUT 0
122 # define VLC_THREAD_PRIORITY_AUDIO 0
123 # define VLC_THREAD_PRIORITY_VIDEO 0
124 # define VLC_THREAD_PRIORITY_OUTPUT 0
125 # define VLC_THREAD_PRIORITY_HIGHEST 0
129 /*****************************************************************************
131 *****************************************************************************/
133 #if defined( PTH_INIT_IN_PTH_H )
134 typedef pth_t vlc_thread_t;
138 vlc_object_t * p_this;
143 vlc_object_t * p_this;
150 #elif defined( ST_INIT_IN_ST_H )
151 typedef st_thread_t vlc_thread_t;
155 vlc_object_t * p_this;
160 vlc_object_t * p_this;
167 #elif defined( WIN32 ) || defined( UNDER_CE )
168 typedef HANDLE vlc_thread_t;
169 typedef BOOL (WINAPI *SIGNALOBJECTANDWAIT) ( HANDLE, HANDLE, DWORD, BOOL );
170 typedef unsigned (WINAPI *PTHREAD_START) (void *);
174 /* WinNT/2K/XP implementation */
176 /* Win95/98/ME implementation */
177 CRITICAL_SECTION csection;
179 vlc_object_t * p_this;
184 volatile int i_waiting_threads;
185 /* WinNT/2K/XP implementation */
187 SIGNALOBJECTANDWAIT SignalObjectAndWait;
188 /* Win95/98/ME implementation */
190 CRITICAL_SECTION csection;
193 vlc_object_t * p_this;
201 #elif defined( HAVE_KERNEL_SCHEDULER_H )
202 /* This is the BeOS implementation of the vlc threads, note that the mutex is
203 * not a real mutex and the cond_var is not like a pthread cond_var but it is
204 * enough for what wee need */
206 typedef thread_id vlc_thread_t;
213 vlc_object_t * p_this;
221 vlc_object_t * p_this;
229 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
230 typedef pthread_t vlc_thread_t;
233 pthread_mutex_t mutex;
234 vlc_object_t * p_this;
239 vlc_object_t * p_this;
244 pthread_key_t handle;
247 #elif defined( HAVE_CTHREADS_H )
248 typedef cthread_t vlc_thread_t;
250 /* Those structs are the ones defined in /include/cthreads.h but we need
251 * to handle (&foo) where foo is a (mutex_t) while they handle (foo) where
252 * foo is a (mutex_t*) */
258 struct cthread_queue queue;
260 vlc_object_t * p_this;
266 struct cthread_queue queue;
268 struct cond_imp *implications;
270 vlc_object_t * p_this;
275 cthread_key_t handle;