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
34 #if defined(DEBUG) && defined(HAVE_SYS_TIME_H)
35 # include <sys/time.h>
38 #if defined( PTH_INIT_IN_PTH_H ) /* GNU Pth */
41 #elif defined( ST_INIT_IN_ST_H ) /* State threads */
44 #elif defined( UNDER_CE )
46 #elif defined( WIN32 )
47 # include <process.h> /* Win32 API */
49 #elif defined( HAVE_KERNEL_SCHEDULER_H ) /* BeOS */
50 # include <kernel/OS.h>
51 # include <kernel/scheduler.h>
52 # include <byteorder.h>
54 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) /* pthreads (like Linux & BSD) */
55 # define LIBVLC_USE_PTHREAD 1
59 /* Needed for pthread_cond_timedwait */
62 /* This is not prototyped under Linux, though it exists. */
63 int pthread_mutexattr_setkind_np( pthread_mutexattr_t *attr, int kind );
65 #elif defined( HAVE_CTHREADS_H ) /* GNUMach */
66 # include <cthreads.h>
69 # error no threads available on your system !
73 /*****************************************************************************
75 *****************************************************************************/
77 /* Thread priorities */
79 # define VLC_THREAD_PRIORITY_LOW (-47)
80 # define VLC_THREAD_PRIORITY_INPUT 37
81 # define VLC_THREAD_PRIORITY_AUDIO 37
82 # define VLC_THREAD_PRIORITY_VIDEO (-47)
83 # define VLC_THREAD_PRIORITY_OUTPUT 37
84 # define VLC_THREAD_PRIORITY_HIGHEST 37
86 #elif defined(SYS_BEOS)
87 # define VLC_THREAD_PRIORITY_LOW 5
88 # define VLC_THREAD_PRIORITY_INPUT 10
89 # define VLC_THREAD_PRIORITY_AUDIO 10
90 # define VLC_THREAD_PRIORITY_VIDEO 5
91 # define VLC_THREAD_PRIORITY_OUTPUT 15
92 # define VLC_THREAD_PRIORITY_HIGHEST 15
94 #elif defined(PTHREAD_COND_T_IN_PTHREAD_H)
95 # define VLC_THREAD_PRIORITY_LOW 0
96 # define VLC_THREAD_PRIORITY_INPUT 20
97 # define VLC_THREAD_PRIORITY_AUDIO 10
98 # define VLC_THREAD_PRIORITY_VIDEO 0
99 # define VLC_THREAD_PRIORITY_OUTPUT 30
100 # define VLC_THREAD_PRIORITY_HIGHEST 40
102 #elif defined(WIN32) || defined(UNDER_CE)
103 /* Define different priorities for WinNT/2K/XP and Win9x/Me */
104 # define VLC_THREAD_PRIORITY_LOW 0
105 # define VLC_THREAD_PRIORITY_INPUT \
106 (IS_WINNT ? THREAD_PRIORITY_ABOVE_NORMAL : 0)
107 # define VLC_THREAD_PRIORITY_AUDIO \
108 (IS_WINNT ? THREAD_PRIORITY_HIGHEST : 0)
109 # define VLC_THREAD_PRIORITY_VIDEO \
110 (IS_WINNT ? 0 : THREAD_PRIORITY_BELOW_NORMAL )
111 # define VLC_THREAD_PRIORITY_OUTPUT \
112 (IS_WINNT ? THREAD_PRIORITY_ABOVE_NORMAL : 0)
113 # define VLC_THREAD_PRIORITY_HIGHEST \
114 (IS_WINNT ? THREAD_PRIORITY_TIME_CRITICAL : 0)
117 # define VLC_THREAD_PRIORITY_LOW 0
118 # define VLC_THREAD_PRIORITY_INPUT 0
119 # define VLC_THREAD_PRIORITY_AUDIO 0
120 # define VLC_THREAD_PRIORITY_VIDEO 0
121 # define VLC_THREAD_PRIORITY_OUTPUT 0
122 # define VLC_THREAD_PRIORITY_HIGHEST 0
126 /*****************************************************************************
128 *****************************************************************************/
130 #if defined( PTH_INIT_IN_PTH_H )
131 typedef pth_t vlc_thread_t;
135 vlc_object_t * p_this;
140 vlc_object_t * p_this;
143 #elif defined( ST_INIT_IN_ST_H )
144 typedef st_thread_t vlc_thread_t;
148 vlc_object_t * p_this;
153 vlc_object_t * p_this;
156 #elif defined( WIN32 ) || defined( UNDER_CE )
157 typedef HANDLE vlc_thread_t;
158 typedef BOOL (WINAPI *SIGNALOBJECTANDWAIT) ( HANDLE, HANDLE, DWORD, BOOL );
159 typedef unsigned (WINAPI *PTHREAD_START) (void *);
163 /* WinNT/2K/XP implementation */
165 /* Win95/98/ME implementation */
166 CRITICAL_SECTION csection;
168 vlc_object_t * p_this;
173 volatile int i_waiting_threads;
174 /* WinNT/2K/XP implementation */
176 SIGNALOBJECTANDWAIT SignalObjectAndWait;
177 /* Win95/98/ME implementation */
179 CRITICAL_SECTION csection;
182 vlc_object_t * p_this;
185 #elif defined( HAVE_KERNEL_SCHEDULER_H )
186 /* This is the BeOS implementation of the vlc threads, note that the mutex is
187 * not a real mutex and the cond_var is not like a pthread cond_var but it is
188 * enough for what wee need */
190 typedef thread_id vlc_thread_t;
197 vlc_object_t * p_this;
205 vlc_object_t * p_this;
208 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
209 typedef pthread_t vlc_thread_t;
212 pthread_mutex_t mutex;
213 vlc_object_t * p_this;
218 vlc_object_t * p_this;
221 #elif defined( HAVE_CTHREADS_H )
222 typedef cthread_t vlc_thread_t;
224 /* Those structs are the ones defined in /include/cthreads.h but we need
225 * to handle (&foo) where foo is a (mutex_t) while they handle (foo) where
226 * foo is a (mutex_t*) */
232 struct cthread_queue queue;
234 vlc_object_t * p_this;
240 struct cthread_queue queue;
242 struct cond_imp *implications;
244 vlc_object_t * p_this;