vlc_threads.h
上传用户:riyaled888
上传日期:2009-03-27
资源大小:7338k
文件大小:7k
- /*****************************************************************************
- * vlc_threads.h : threads implementation for the VideoLAN client
- * This header provides portable declarations for mutexes & conditions
- *****************************************************************************
- * Copyright (C) 1999, 2002 VideoLAN
- * $Id: vlc_threads.h 6961 2004-03-05 17:34:23Z sam $
- *
- * Authors: Jean-Marc Dressler <polux@via.ecp.fr>
- * Samuel Hocevar <sam@via.ecp.fr>
- * Gildas Bazin <gbazin@netcourrier.com>
- * Christophe Massiot <massiot@via.ecp.fr>
- *
- * 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- #include <stdio.h>
- #if defined(DEBUG) && defined(HAVE_SYS_TIME_H)
- # include <sys/time.h>
- #endif
- #if defined( PTH_INIT_IN_PTH_H ) /* GNU Pth */
- # include <pth.h>
- #elif defined( ST_INIT_IN_ST_H ) /* State threads */
- # include <st.h>
- #elif defined( UNDER_CE )
- /* WinCE API */
- #elif defined( WIN32 )
- # include <process.h> /* Win32 API */
- #elif defined( HAVE_KERNEL_SCHEDULER_H ) /* BeOS */
- # include <kernel/OS.h>
- # include <kernel/scheduler.h>
- # include <byteorder.h>
- #elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) /* pthreads (like Linux & BSD) */
- # include <pthread.h>
- # ifdef DEBUG
- /* Needed for pthread_cond_timedwait */
- # include <errno.h>
- # 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 <cthreads.h>
- #else
- # error no threads available on your system !
- #endif
- /*****************************************************************************
- * Constants
- *****************************************************************************/
- /* Thread priorities */
- #ifdef SYS_DARWIN
- # 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
- #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
- #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
- #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
- #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 (__stdcall *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