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( UNDER_CE )
39 #elif defined( WIN32 )
40 # include <process.h> /* Win32 API */
42 #elif defined( HAVE_KERNEL_SCHEDULER_H ) /* BeOS */
43 # include <kernel/OS.h>
44 # include <kernel/scheduler.h>
45 # include <byteorder.h>
47 #else /* pthreads (like Linux & BSD) */
48 # define LIBVLC_USE_PTHREAD 1
49 # define _APPLE_C_SOURCE 1 /* Proper pthread semantics on OSX */
51 # include <unistd.h> /* _POSIX_SPIN_LOCKS */
53 /* Needed for pthread_cond_timedwait */
59 /*****************************************************************************
61 *****************************************************************************/
63 /* Thread priorities */
65 # define VLC_THREAD_PRIORITY_LOW (-47)
66 # define VLC_THREAD_PRIORITY_INPUT 37
67 # define VLC_THREAD_PRIORITY_AUDIO 37
68 # define VLC_THREAD_PRIORITY_VIDEO (-47)
69 # define VLC_THREAD_PRIORITY_OUTPUT 37
70 # define VLC_THREAD_PRIORITY_HIGHEST 37
72 #elif defined(SYS_BEOS)
73 # define VLC_THREAD_PRIORITY_LOW 5
74 # define VLC_THREAD_PRIORITY_INPUT 10
75 # define VLC_THREAD_PRIORITY_AUDIO 10
76 # define VLC_THREAD_PRIORITY_VIDEO 5
77 # define VLC_THREAD_PRIORITY_OUTPUT 15
78 # define VLC_THREAD_PRIORITY_HIGHEST 15
80 #elif defined(LIBVLC_USE_PTHREAD)
81 # define VLC_THREAD_PRIORITY_LOW 0
82 # define VLC_THREAD_PRIORITY_INPUT 20
83 # define VLC_THREAD_PRIORITY_AUDIO 10
84 # define VLC_THREAD_PRIORITY_VIDEO 0
85 # define VLC_THREAD_PRIORITY_OUTPUT 30
86 # define VLC_THREAD_PRIORITY_HIGHEST 40
88 #elif defined(WIN32) || defined(UNDER_CE)
89 /* Define different priorities for WinNT/2K/XP and Win9x/Me */
90 # define VLC_THREAD_PRIORITY_LOW 0
91 # define VLC_THREAD_PRIORITY_INPUT \
92 (IS_WINNT ? THREAD_PRIORITY_ABOVE_NORMAL : 0)
93 # define VLC_THREAD_PRIORITY_AUDIO \
94 (IS_WINNT ? THREAD_PRIORITY_HIGHEST : 0)
95 # define VLC_THREAD_PRIORITY_VIDEO \
96 (IS_WINNT ? 0 : THREAD_PRIORITY_BELOW_NORMAL )
97 # define VLC_THREAD_PRIORITY_OUTPUT \
98 (IS_WINNT ? THREAD_PRIORITY_ABOVE_NORMAL : 0)
99 # define VLC_THREAD_PRIORITY_HIGHEST \
100 (IS_WINNT ? THREAD_PRIORITY_TIME_CRITICAL : 0)
103 # define VLC_THREAD_PRIORITY_LOW 0
104 # define VLC_THREAD_PRIORITY_INPUT 0
105 # define VLC_THREAD_PRIORITY_AUDIO 0
106 # define VLC_THREAD_PRIORITY_VIDEO 0
107 # define VLC_THREAD_PRIORITY_OUTPUT 0
108 # define VLC_THREAD_PRIORITY_HIGHEST 0
112 /*****************************************************************************
114 *****************************************************************************/
116 #if defined( WIN32 ) || defined( UNDER_CE )
122 ** handle to created thread, needs be closed to dispose of it
123 ** even after thread has exited
128 typedef BOOL (WINAPI *SIGNALOBJECTANDWAIT) ( HANDLE, HANDLE, DWORD, BOOL );
132 /* WinNT/2K/XP implementation */
134 /* Win95/98/ME implementation */
135 CRITICAL_SECTION csection;
140 volatile int i_waiting_threads;
141 /* WinNT/2K/XP implementation */
143 SIGNALOBJECTANDWAIT SignalObjectAndWait;
144 /* Win95/98/ME implementation */
146 CRITICAL_SECTION csection;
155 #elif defined( HAVE_KERNEL_SCHEDULER_H )
156 /* This is the BeOS implementation of the vlc threads, note that the mutex is
157 * not a real mutex and the cond_var is not like a pthread cond_var but it is
158 * enough for what we need */
160 typedef thread_id vlc_thread_t;
180 typedef pthread_t vlc_thread_t;
183 pthread_mutex_t mutex;
192 pthread_key_t handle;
197 #endif /* !_VLC_THREADS_H */