/***************************************************************************** * vlc_threads.h : threads implementation for the VideoLAN client * This header provides portable declarations for mutexes & conditions ***************************************************************************** * Copyright (C) 1999, 2002 the VideoLAN team * $Id: vlc_threads.h 14104 2006-02-01 13:01:06Z sam $ * * Authors: Jean-Marc Dressler * Samuel Hocevar * Gildas Bazin * Christophe Massiot * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ #include #if defined(DEBUG) && defined(HAVE_SYS_TIME_H) # include #endif #if defined( PTH_INIT_IN_PTH_H ) /* GNU Pth */ # include #elif defined( ST_INIT_IN_ST_H ) /* State threads */ # include #elif defined( UNDER_CE ) /* WinCE API */ #elif defined( WIN32 ) # include /* Win32 API */ #elif defined( HAVE_KERNEL_SCHEDULER_H ) /* BeOS */ # include # include # include #elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) /* pthreads (like Linux & BSD) */ # include # ifdef DEBUG /* Needed for pthread_cond_timedwait */ # include # endif /* This is not prototyped under Linux, though it exists. */ int pthread_mutexattr_setkind_np( pthread_mutexattr_t *attr, int kind ); #elif defined( HAVE_CTHREADS_H ) /* GNUMach */ # include #else # error no threads available on your system ! #endif /***************************************************************************** * Constants *****************************************************************************/ /* Thread priorities */ #ifdef __APPLE__ # define VLC_THREAD_PRIORITY_LOW (-47) # define VLC_THREAD_PRIORITY_INPUT 37 # define VLC_THREAD_PRIORITY_AUDIO 37 # define VLC_THREAD_PRIORITY_VIDEO (-47) # define VLC_THREAD_PRIORITY_OUTPUT 37 # define VLC_THREAD_PRIORITY_HIGHEST 37 #elif defined(SYS_BEOS) # define VLC_THREAD_PRIORITY_LOW 5 # define VLC_THREAD_PRIORITY_INPUT 10 # define VLC_THREAD_PRIORITY_AUDIO 10 # define VLC_THREAD_PRIORITY_VIDEO 5 # define VLC_THREAD_PRIORITY_OUTPUT 15 # define VLC_THREAD_PRIORITY_HIGHEST 15 #elif defined(PTHREAD_COND_T_IN_PTHREAD_H) # define VLC_THREAD_PRIORITY_LOW 0 # define VLC_THREAD_PRIORITY_INPUT 20 # define VLC_THREAD_PRIORITY_AUDIO 10 # define VLC_THREAD_PRIORITY_VIDEO 0 # define VLC_THREAD_PRIORITY_OUTPUT 30 # define VLC_THREAD_PRIORITY_HIGHEST 40 #elif defined(WIN32) || defined(UNDER_CE) /* Define different priorities for WinNT/2K/XP and Win9x/Me */ # define VLC_THREAD_PRIORITY_LOW 0 # define VLC_THREAD_PRIORITY_INPUT \ (IS_WINNT ? THREAD_PRIORITY_ABOVE_NORMAL : 0) # define VLC_THREAD_PRIORITY_AUDIO \ (IS_WINNT ? THREAD_PRIORITY_HIGHEST : 0) # define VLC_THREAD_PRIORITY_VIDEO \ (IS_WINNT ? 0 : THREAD_PRIORITY_BELOW_NORMAL ) # define VLC_THREAD_PRIORITY_OUTPUT \ (IS_WINNT ? THREAD_PRIORITY_ABOVE_NORMAL : 0) # define VLC_THREAD_PRIORITY_HIGHEST \ (IS_WINNT ? THREAD_PRIORITY_TIME_CRITICAL : 0) #else # define VLC_THREAD_PRIORITY_LOW 0 # define VLC_THREAD_PRIORITY_INPUT 0 # define VLC_THREAD_PRIORITY_AUDIO 0 # define VLC_THREAD_PRIORITY_VIDEO 0 # define VLC_THREAD_PRIORITY_OUTPUT 0 # define VLC_THREAD_PRIORITY_HIGHEST 0 #endif /***************************************************************************** * Type definitions *****************************************************************************/ #if defined( PTH_INIT_IN_PTH_H ) typedef pth_t vlc_thread_t; typedef struct { pth_mutex_t mutex; vlc_object_t * p_this; } vlc_mutex_t; typedef struct { pth_cond_t cond; vlc_object_t * p_this; } vlc_cond_t; #elif defined( ST_INIT_IN_ST_H ) typedef st_thread_t vlc_thread_t; typedef struct { st_mutex_t mutex; vlc_object_t * p_this; } vlc_mutex_t; typedef struct { st_cond_t cond; vlc_object_t * p_this; } vlc_cond_t; #elif defined( WIN32 ) || defined( UNDER_CE ) typedef HANDLE vlc_thread_t; typedef BOOL (WINAPI *SIGNALOBJECTANDWAIT) ( HANDLE, HANDLE, DWORD, BOOL ); typedef unsigned (WINAPI *PTHREAD_START) (void *); typedef struct { /* WinNT/2K/XP implementation */ HANDLE mutex; /* Win95/98/ME implementation */ CRITICAL_SECTION csection; vlc_object_t * p_this; } vlc_mutex_t; typedef struct { volatile int i_waiting_threads; /* WinNT/2K/XP implementation */ HANDLE event; SIGNALOBJECTANDWAIT SignalObjectAndWait; /* Win95/98/ME implementation */ HANDLE semaphore; CRITICAL_SECTION csection; int i_win9x_cv; vlc_object_t * p_this; } vlc_cond_t; #elif defined( HAVE_KERNEL_SCHEDULER_H ) /* This is the BeOS implementation of the vlc threads, note that the mutex is * not a real mutex and the cond_var is not like a pthread cond_var but it is * enough for what wee need */ typedef thread_id vlc_thread_t; typedef struct { int32_t init; sem_id lock; vlc_object_t * p_this; } vlc_mutex_t; typedef struct { int32_t init; thread_id thread; vlc_object_t * p_this; } vlc_cond_t; #elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) typedef pthread_t vlc_thread_t; typedef struct { pthread_mutex_t mutex; vlc_object_t * p_this; } vlc_mutex_t; typedef struct { pthread_cond_t cond; vlc_object_t * p_this; } vlc_cond_t; #elif defined( HAVE_CTHREADS_H ) typedef cthread_t vlc_thread_t; /* Those structs are the ones defined in /include/cthreads.h but we need * to handle (&foo) where foo is a (mutex_t) while they handle (foo) where * foo is a (mutex_t*) */ typedef struct { spin_lock_t held; spin_lock_t lock; char *name; struct cthread_queue queue; vlc_object_t * p_this; } vlc_mutex_t; typedef struct { spin_lock_t lock; struct cthread_queue queue; char *name; struct cond_imp *implications; vlc_object_t * p_this; } vlc_cond_t; #endif