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
59 # define _APPLE_C_SOURCE 1 /* Proper pthread semantics on OSX */
63 /* Needed for pthread_cond_timedwait */
66 /* This is not prototyped under Linux, though it exists. */
67 int pthread_mutexattr_setkind_np( pthread_mutexattr_t *attr, int kind );
69 #elif defined( HAVE_CTHREADS_H ) /* GNUMach */
70 # include <cthreads.h>
73 # error no threads available on your system !
77 /*****************************************************************************
79 *****************************************************************************/
81 /* Thread priorities */
83 # define VLC_THREAD_PRIORITY_LOW (-47)
84 # define VLC_THREAD_PRIORITY_INPUT 37
85 # define VLC_THREAD_PRIORITY_AUDIO 37
86 # define VLC_THREAD_PRIORITY_VIDEO (-47)
87 # define VLC_THREAD_PRIORITY_OUTPUT 37
88 # define VLC_THREAD_PRIORITY_HIGHEST 37
90 #elif defined(SYS_BEOS)
91 # define VLC_THREAD_PRIORITY_LOW 5
92 # define VLC_THREAD_PRIORITY_INPUT 10
93 # define VLC_THREAD_PRIORITY_AUDIO 10
94 # define VLC_THREAD_PRIORITY_VIDEO 5
95 # define VLC_THREAD_PRIORITY_OUTPUT 15
96 # define VLC_THREAD_PRIORITY_HIGHEST 15
98 #elif defined(PTHREAD_COND_T_IN_PTHREAD_H)
99 # define VLC_THREAD_PRIORITY_LOW 0
100 # define VLC_THREAD_PRIORITY_INPUT 20
101 # define VLC_THREAD_PRIORITY_AUDIO 10
102 # define VLC_THREAD_PRIORITY_VIDEO 0
103 # define VLC_THREAD_PRIORITY_OUTPUT 30
104 # define VLC_THREAD_PRIORITY_HIGHEST 40
106 #elif defined(WIN32) || defined(UNDER_CE)
107 /* Define different priorities for WinNT/2K/XP and Win9x/Me */
108 # define VLC_THREAD_PRIORITY_LOW 0
109 # define VLC_THREAD_PRIORITY_INPUT \
110 (IS_WINNT ? THREAD_PRIORITY_ABOVE_NORMAL : 0)
111 # define VLC_THREAD_PRIORITY_AUDIO \
112 (IS_WINNT ? THREAD_PRIORITY_HIGHEST : 0)
113 # define VLC_THREAD_PRIORITY_VIDEO \
114 (IS_WINNT ? 0 : THREAD_PRIORITY_BELOW_NORMAL )
115 # define VLC_THREAD_PRIORITY_OUTPUT \
116 (IS_WINNT ? THREAD_PRIORITY_ABOVE_NORMAL : 0)
117 # define VLC_THREAD_PRIORITY_HIGHEST \
118 (IS_WINNT ? THREAD_PRIORITY_TIME_CRITICAL : 0)
121 # define VLC_THREAD_PRIORITY_LOW 0
122 # define VLC_THREAD_PRIORITY_INPUT 0
123 # define VLC_THREAD_PRIORITY_AUDIO 0
124 # define VLC_THREAD_PRIORITY_VIDEO 0
125 # define VLC_THREAD_PRIORITY_OUTPUT 0
126 # define VLC_THREAD_PRIORITY_HIGHEST 0
130 /*****************************************************************************
132 *****************************************************************************/
134 #if defined( PTH_INIT_IN_PTH_H )
135 typedef pth_t vlc_thread_t;
139 vlc_object_t * p_this;
144 vlc_object_t * p_this;
151 #elif defined( ST_INIT_IN_ST_H )
152 typedef st_thread_t vlc_thread_t;
156 vlc_object_t * p_this;
161 vlc_object_t * p_this;
168 #elif defined( WIN32 ) || defined( UNDER_CE )
174 ** handle to created thread, needs be closed to dispose of it
175 ** even after thread has exited
180 typedef BOOL (WINAPI *SIGNALOBJECTANDWAIT) ( HANDLE, HANDLE, DWORD, BOOL );
184 /* WinNT/2K/XP implementation */
186 /* Win95/98/ME implementation */
187 CRITICAL_SECTION csection;
189 vlc_object_t * p_this;
194 volatile int i_waiting_threads;
195 /* WinNT/2K/XP implementation */
197 SIGNALOBJECTANDWAIT SignalObjectAndWait;
198 /* Win95/98/ME implementation */
200 CRITICAL_SECTION csection;
203 vlc_object_t * p_this;
211 #elif defined( HAVE_KERNEL_SCHEDULER_H )
212 /* This is the BeOS implementation of the vlc threads, note that the mutex is
213 * not a real mutex and the cond_var is not like a pthread cond_var but it is
214 * enough for what we need */
216 typedef thread_id vlc_thread_t;
223 vlc_object_t * p_this;
231 vlc_object_t * p_this;
239 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
240 typedef pthread_t vlc_thread_t;
243 pthread_mutex_t mutex;
244 vlc_object_t * p_this;
249 vlc_object_t * p_this;
254 pthread_key_t handle;
257 #elif defined( HAVE_CTHREADS_H )
258 typedef cthread_t vlc_thread_t;
260 /* Those structs are the ones defined in /include/cthreads.h but we need
261 * to handle (&foo) where foo is a (mutex_t) while they handle (foo) where
262 * foo is a (mutex_t*) */
268 struct cthread_queue queue;
270 vlc_object_t * p_this;
276 struct cthread_queue queue;
278 struct cond_imp *implications;
280 vlc_object_t * p_this;
285 cthread_key_t handle;