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 *****************************************************************************/
30 #if defined(DEBUG) && defined(HAVE_SYS_TIME_H)
31 # include <sys/time.h>
34 #if defined( PTH_INIT_IN_PTH_H ) /* GNU Pth */
37 #elif defined( ST_INIT_IN_ST_H ) /* State threads */
40 #elif defined( UNDER_CE )
42 #elif defined( WIN32 )
43 # include <process.h> /* Win32 API */
45 #elif defined( HAVE_KERNEL_SCHEDULER_H ) /* BeOS */
46 # include <kernel/OS.h>
47 # include <kernel/scheduler.h>
48 # include <byteorder.h>
50 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) /* pthreads (like Linux & BSD) */
51 # define LIBVLC_USE_PTHREAD 1
55 /* Needed for pthread_cond_timedwait */
58 /* This is not prototyped under Linux, though it exists. */
59 int pthread_mutexattr_setkind_np( pthread_mutexattr_t *attr, int kind );
61 #elif defined( HAVE_CTHREADS_H ) /* GNUMach */
62 # include <cthreads.h>
65 # error no threads available on your system !
69 /*****************************************************************************
71 *****************************************************************************/
73 /* Thread priorities */
75 # define VLC_THREAD_PRIORITY_LOW (-47)
76 # define VLC_THREAD_PRIORITY_INPUT 37
77 # define VLC_THREAD_PRIORITY_AUDIO 37
78 # define VLC_THREAD_PRIORITY_VIDEO (-47)
79 # define VLC_THREAD_PRIORITY_OUTPUT 37
80 # define VLC_THREAD_PRIORITY_HIGHEST 37
82 #elif defined(SYS_BEOS)
83 # define VLC_THREAD_PRIORITY_LOW 5
84 # define VLC_THREAD_PRIORITY_INPUT 10
85 # define VLC_THREAD_PRIORITY_AUDIO 10
86 # define VLC_THREAD_PRIORITY_VIDEO 5
87 # define VLC_THREAD_PRIORITY_OUTPUT 15
88 # define VLC_THREAD_PRIORITY_HIGHEST 15
90 #elif defined(PTHREAD_COND_T_IN_PTHREAD_H)
91 # define VLC_THREAD_PRIORITY_LOW 0
92 # define VLC_THREAD_PRIORITY_INPUT 20
93 # define VLC_THREAD_PRIORITY_AUDIO 10
94 # define VLC_THREAD_PRIORITY_VIDEO 0
95 # define VLC_THREAD_PRIORITY_OUTPUT 30
96 # define VLC_THREAD_PRIORITY_HIGHEST 40
98 #elif defined(WIN32) || defined(UNDER_CE)
99 /* Define different priorities for WinNT/2K/XP and Win9x/Me */
100 # define VLC_THREAD_PRIORITY_LOW 0
101 # define VLC_THREAD_PRIORITY_INPUT \
102 (IS_WINNT ? THREAD_PRIORITY_ABOVE_NORMAL : 0)
103 # define VLC_THREAD_PRIORITY_AUDIO \
104 (IS_WINNT ? THREAD_PRIORITY_HIGHEST : 0)
105 # define VLC_THREAD_PRIORITY_VIDEO \
106 (IS_WINNT ? 0 : THREAD_PRIORITY_BELOW_NORMAL )
107 # define VLC_THREAD_PRIORITY_OUTPUT \
108 (IS_WINNT ? THREAD_PRIORITY_ABOVE_NORMAL : 0)
109 # define VLC_THREAD_PRIORITY_HIGHEST \
110 (IS_WINNT ? THREAD_PRIORITY_TIME_CRITICAL : 0)
113 # define VLC_THREAD_PRIORITY_LOW 0
114 # define VLC_THREAD_PRIORITY_INPUT 0
115 # define VLC_THREAD_PRIORITY_AUDIO 0
116 # define VLC_THREAD_PRIORITY_VIDEO 0
117 # define VLC_THREAD_PRIORITY_OUTPUT 0
118 # define VLC_THREAD_PRIORITY_HIGHEST 0
122 /*****************************************************************************
124 *****************************************************************************/
126 #if defined( PTH_INIT_IN_PTH_H )
127 typedef pth_t vlc_thread_t;
131 vlc_object_t * p_this;
136 vlc_object_t * p_this;
139 #elif defined( ST_INIT_IN_ST_H )
140 typedef st_thread_t vlc_thread_t;
144 vlc_object_t * p_this;
149 vlc_object_t * p_this;
152 #elif defined( WIN32 ) || defined( UNDER_CE )
153 typedef HANDLE vlc_thread_t;
154 typedef BOOL (WINAPI *SIGNALOBJECTANDWAIT) ( HANDLE, HANDLE, DWORD, BOOL );
155 typedef unsigned (WINAPI *PTHREAD_START) (void *);
159 /* WinNT/2K/XP implementation */
161 /* Win95/98/ME implementation */
162 CRITICAL_SECTION csection;
164 vlc_object_t * p_this;
169 volatile int i_waiting_threads;
170 /* WinNT/2K/XP implementation */
172 SIGNALOBJECTANDWAIT SignalObjectAndWait;
173 /* Win95/98/ME implementation */
175 CRITICAL_SECTION csection;
178 vlc_object_t * p_this;
181 #elif defined( HAVE_KERNEL_SCHEDULER_H )
182 /* This is the BeOS implementation of the vlc threads, note that the mutex is
183 * not a real mutex and the cond_var is not like a pthread cond_var but it is
184 * enough for what wee need */
186 typedef thread_id vlc_thread_t;
193 vlc_object_t * p_this;
201 vlc_object_t * p_this;
204 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
205 typedef pthread_t vlc_thread_t;
208 pthread_mutex_t mutex;
209 vlc_object_t * p_this;
214 vlc_object_t * p_this;
217 #elif defined( HAVE_CTHREADS_H )
218 typedef cthread_t vlc_thread_t;
220 /* Those structs are the ones defined in /include/cthreads.h but we need
221 * to handle (&foo) where foo is a (mutex_t) while they handle (foo) where
222 * foo is a (mutex_t*) */
228 struct cthread_queue queue;
230 vlc_object_t * p_this;
236 struct cthread_queue queue;
238 struct cond_imp *implications;
240 vlc_object_t * p_this;