X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=include%2Fvlc_threads.h;h=911d36b73709dd3c895bfef4a352f6581291395c;hb=ab8abe8239a615b952cbb96ec33e7338602ad8ee;hp=58366043e071e1389e2e9e5a35a0f2581cf4ecd1;hpb=7689bc9224e3d9516c56126980cb68eadca6fcaf;p=vlc diff --git a/include/vlc_threads.h b/include/vlc_threads.h index 58366043e0..911d36b737 100644 --- a/include/vlc_threads.h +++ b/include/vlc_threads.h @@ -1,19 +1,20 @@ /***************************************************************************** - * threads.h : threads implementation for the VideoLAN client - * This header provides a portable threads implementation. + * vlc_threads.h : threads implementation for the VideoLAN client + * This header provides portable declarations for mutexes & conditions ***************************************************************************** - * Copyright (C) 1999, 2000 VideoLAN - * $Id: vlc_threads.h,v 1.9 2002/08/08 00:35:10 sam Exp $ + * Copyright (C) 1999, 2002 the VideoLAN team + * $Id$ * * 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 @@ -21,12 +22,19 @@ * * 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. + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ +#if !defined( __LIBVLC__ ) + #error You are not libvlc or one of its plugins. You cannot include this file +#endif + +#ifndef _VLC_THREADS_H_ +#define _VLC_THREADS_H_ + #include -#if defined(GPROF) || defined(DEBUG) +#if defined(DEBUG) && defined(HAVE_SYS_TIME_H) # include #endif @@ -36,10 +44,20 @@ #elif defined( ST_INIT_IN_ST_H ) /* State threads */ # include -#elif defined( WIN32 ) /* Win32 API */ -# 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) */ +# define LIBVLC_USE_PTHREAD 1 +# define _APPLE_C_SOURCE 1 /* Proper pthread semantics on OSX */ + # include # ifdef DEBUG /* Needed for pthread_cond_timedwait */ @@ -51,11 +69,6 @@ #elif defined( HAVE_CTHREADS_H ) /* GNUMach */ # include -#elif defined( HAVE_KERNEL_SCHEDULER_H ) /* BeOS */ -# include -# include -# include - #else # error no threads available on your system ! @@ -63,29 +76,56 @@ /***************************************************************************** * Constants - ***************************************************************************** - * These constants are used by all threads in *_CreateThread() and - * *_DestroyThreads() functions. Since those calls are non-blocking, an integer - * value is used as a shared flag to represent the status of the thread. *****************************************************************************/ -/* Void status - this value can be used to make sure no operation is currently - * in progress on the concerned thread in an array of recorded threads */ -#define THREAD_NOP 0 /* nothing happened */ +/* 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) -/* Creation status */ -#define THREAD_CREATE 10 /* thread is initializing */ -#define THREAD_START 11 /* thread has forked */ -#define THREAD_READY 19 /* thread is ready */ - -/* Destructions status */ -#define THREAD_DESTROY 20 /* destruction order has been sent */ -#define THREAD_END 21 /* destruction order has been received */ -#define THREAD_OVER 29 /* thread does not exist any more */ +#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 -/* Error status */ -#define THREAD_ERROR 30 /* an error occured */ -#define THREAD_FATAL 31 /* an fatal error occured - program must end */ +#endif /***************************************************************************** * Type definitions @@ -93,18 +133,51 @@ #if defined( PTH_INIT_IN_PTH_H ) typedef pth_t vlc_thread_t; -typedef pth_mutex_t vlc_mutex_t; -typedef pth_cond_t vlc_cond_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; +typedef struct +{ + int handle; +} vlc_threadvar_t; #elif defined( ST_INIT_IN_ST_H ) -typedef st_thread_t * vlc_thread_t; -typedef st_mutex_t * vlc_mutex_t; -typedef st_cond_t * vlc_cond_t; +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; +typedef struct +{ + int handle; +} vlc_threadvar_t; + +#elif defined( WIN32 ) || defined( UNDER_CE ) +typedef struct +{ + /* thread id */ + DWORD id; + /* + ** handle to created thread, needs be closed to dispose of it + ** even after thread has exited + */ + HANDLE hThread; +} vlc_thread_t; -#elif defined( WIN32 ) -typedef HANDLE vlc_thread_t; typedef BOOL (WINAPI *SIGNALOBJECTANDWAIT) ( HANDLE, HANDLE, DWORD, BOOL ); -typedef unsigned (__stdcall *PTHREAD_START) (void *); typedef struct { @@ -112,6 +185,8 @@ typedef struct HANDLE mutex; /* Win95/98/ME implementation */ CRITICAL_SECTION csection; + + vlc_object_t * p_this; } vlc_mutex_t; typedef struct @@ -124,636 +199,92 @@ typedef struct HANDLE semaphore; CRITICAL_SECTION csection; int i_win9x_cv; -} vlc_cond_t; - -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) -typedef pthread_t vlc_thread_t; -typedef pthread_mutex_t vlc_mutex_t; -typedef pthread_cond_t vlc_cond_t; -#elif defined( HAVE_CTHREADS_H ) -typedef cthread_t vlc_thread_t; + vlc_object_t * p_this; +} vlc_cond_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_mutex_t; - -typedef struct -{ - spin_lock_t lock; - struct cthread_queue queue; - char *name; - struct cond_imp *implications; -} vlc_cond_t; + DWORD handle; +} vlc_threadvar_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 */ + * enough for what we need */ typedef thread_id vlc_thread_t; typedef struct { - int32 init; + int32_t init; sem_id lock; + + vlc_object_t * p_this; } vlc_mutex_t; typedef struct { - int32 init; + int32_t init; thread_id thread; -} vlc_cond_t; - -#endif -/***************************************************************************** - * Function definitions - *****************************************************************************/ -VLC_EXPORT( int, __vlc_threads_init, ( vlc_object_t * ) ); -VLC_EXPORT( int, __vlc_threads_end, ( vlc_object_t * ) ); -VLC_EXPORT( int, __vlc_mutex_init, ( vlc_object_t *, vlc_mutex_t * ) ); -VLC_EXPORT( int, __vlc_mutex_destroy, ( char *, int, vlc_mutex_t * ) ); -VLC_EXPORT( int, __vlc_cond_init, ( vlc_object_t *, vlc_cond_t * ) ); -VLC_EXPORT( int, __vlc_cond_destroy, ( char *, int, vlc_cond_t * ) ); -VLC_EXPORT( int, __vlc_thread_create, ( vlc_object_t *, char *, int, char *, void * ( * ) ( void * ), vlc_bool_t ) ); -VLC_EXPORT( void, __vlc_thread_ready, ( vlc_object_t * ) ); -VLC_EXPORT( void, __vlc_thread_join, ( vlc_object_t *, char *, int ) ); - -/***************************************************************************** - * vlc_threads_init: initialize threads system - *****************************************************************************/ -#define vlc_threads_init( P_THIS ) \ - __vlc_threads_init( VLC_OBJECT(P_THIS) ) - -/***************************************************************************** - * vlc_threads_end: deinitialize threads system - *****************************************************************************/ -#define vlc_threads_end( P_THIS ) \ - __vlc_threads_end( VLC_OBJECT(P_THIS) ) - -/***************************************************************************** - * vlc_mutex_init: initialize a mutex - *****************************************************************************/ -#define vlc_mutex_init( P_THIS, P_MUTEX ) \ - __vlc_mutex_init( VLC_OBJECT(P_THIS), P_MUTEX ) - -/***************************************************************************** - * vlc_mutex_lock: lock a mutex - *****************************************************************************/ -#ifdef DEBUG -# define vlc_mutex_lock( P_MUTEX ) \ - __vlc_mutex_lock( __FILE__, __LINE__, P_MUTEX ) -#else -# define vlc_mutex_lock( P_MUTEX ) \ - __vlc_mutex_lock( "(unknown)", 0, P_MUTEX ) -#endif + vlc_object_t * p_this; +} vlc_cond_t; -static inline int __vlc_mutex_lock( char * psz_file, int i_line, - vlc_mutex_t *p_mutex ) +typedef struct { -#if defined( PTH_INIT_IN_PTH_H ) - return pth_mutex_acquire( p_mutex, TRUE, NULL ); +} vlc_threadvar_t; -#elif defined( ST_INIT_IN_ST_H ) - return st_mutex_lock( *p_mutex ); - -#elif defined( WIN32 ) - if( p_mutex->mutex ) - { - WaitForSingleObject( p_mutex->mutex, INFINITE ); - } - else - { - EnterCriticalSection( &p_mutex->csection ); - } - return 0; #elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) - int i_return = pthread_mutex_lock( p_mutex ); - if( i_return ) - { -#if 0 - msg_Err( "thread %d: mutex_lock failed at %s:%d (%s)", - pthread_self(), psz_file, i_line, strerror(i_return) ); -#endif - } - return i_return; - -#elif defined( HAVE_CTHREADS_H ) - mutex_lock( p_mutex ); - return 0; - -#elif defined( HAVE_KERNEL_SCHEDULER_H ) - status_t err; - - if( !p_mutex ) - { - return B_BAD_VALUE; - } - - if( p_mutex->init < 2000 ) - { - return B_NO_INIT; - } - - err = acquire_sem( p_mutex->lock ); - return err; - -#endif -} - -/***************************************************************************** - * vlc_mutex_unlock: unlock a mutex - *****************************************************************************/ -#ifdef DEBUG -# define vlc_mutex_unlock( P_MUTEX ) \ - __vlc_mutex_unlock( __FILE__, __LINE__, P_MUTEX ) -#else -# define vlc_mutex_unlock( P_MUTEX ) \ - __vlc_mutex_unlock( "(unknown)", 0, P_MUTEX ) -#endif - -static inline int __vlc_mutex_unlock( char * psz_file, int i_line, - vlc_mutex_t *p_mutex ) +typedef pthread_t vlc_thread_t; +typedef struct { -#if defined( PTH_INIT_IN_PTH_H ) - return pth_mutex_release( p_mutex ); - -#elif defined( ST_INIT_IN_ST_H ) - return st_mutex_unlock( *p_mutex ); - -#elif defined( WIN32 ) - if( p_mutex->mutex ) - { - ReleaseMutex( p_mutex->mutex ); - } - else - { - LeaveCriticalSection( &p_mutex->csection ); - } - return 0; - -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) - int i_return = pthread_mutex_unlock( p_mutex ); - if( i_return ) - { -#if 0 - msg_Err( "thread %d: mutex_unlock failed at %s:%d (%s)", - pthread_self(), psz_file, i_line, strerror(i_return) ); -#endif - } - return i_return; - -#elif defined( HAVE_CTHREADS_H ) - mutex_unlock( p_mutex ); - return 0; - -#elif defined( HAVE_KERNEL_SCHEDULER_H ) - if( !p_mutex) - { - return B_BAD_VALUE; - } - - if( p_mutex->init < 2000 ) - { - return B_NO_INIT; - } - - release_sem( p_mutex->lock ); - return B_OK; - -#endif -} - -/***************************************************************************** - * vlc_mutex_destroy: destroy a mutex - *****************************************************************************/ -#ifdef DEBUG -# define vlc_mutex_destroy( P_MUTEX ) \ - __vlc_mutex_destroy( __FILE__, __LINE__, P_MUTEX ) -#else -# define vlc_mutex_destroy( P_MUTEX ) \ - __vlc_mutex_destroy( "(unknown)", 0, P_MUTEX ) -#endif - -/***************************************************************************** - * vlc_cond_init: initialize a condition - *****************************************************************************/ -#define vlc_cond_init( P_THIS, P_COND ) \ - __vlc_cond_init( VLC_OBJECT(P_THIS), P_COND ) - -/***************************************************************************** - * vlc_cond_signal: start a thread on condition completion - *****************************************************************************/ -static inline int vlc_cond_signal( vlc_cond_t *p_condvar ) + pthread_mutex_t mutex; + vlc_object_t * p_this; +} vlc_mutex_t; +typedef struct { -#if defined( PTH_INIT_IN_PTH_H ) - return pth_cond_notify( p_condvar, FALSE ); - -#elif defined( ST_INIT_IN_ST_H ) - return st_cond_signal( *p_condvar ); - -#elif defined( WIN32 ) - /* Release one waiting thread if one is available. */ - /* For this trick to work properly, the vlc_cond_signal must be surrounded - * by a mutex. This will prevent another thread from stealing the signal */ - if( !p_condvar->semaphore ) - { - PulseEvent( p_condvar->event ); - } - else if( p_condvar->i_win9x_cv == 1 ) - { - /* Wait for the gate to be open */ - WaitForSingleObject( p_condvar->event, INFINITE ); - - if( p_condvar->i_waiting_threads ) - { - /* Using a semaphore exposes us to a race condition. It is - * possible for another thread to start waiting on the semaphore - * just after we signaled it and thus steal the signal. - * We have to prevent new threads from entering the cond_wait(). */ - ResetEvent( p_condvar->event ); - - /* A semaphore is used here because Win9x doesn't have - * SignalObjectAndWait() and thus a race condition exists - * during the time we release the mutex and the time we start - * waiting on the event (more precisely, the signal can sometimes - * be missed by the waiting thread if we use PulseEvent()). */ - ReleaseSemaphore( p_condvar->semaphore, 1, 0 ); - } - } - else - { - if( p_condvar->i_waiting_threads ) - { - ReleaseSemaphore( p_condvar->semaphore, 1, 0 ); - - /* Wait for the last thread to be awakened */ - WaitForSingleObject( p_condvar->event, INFINITE ); - } - } - return 0; - -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) - return pthread_cond_signal( p_condvar ); - -#elif defined( HAVE_CTHREADS_H ) - /* condition_signal() */ - if ( p_condvar->queue.head || p_condvar->implications ) - { - cond_signal( (condition_t)p_condvar ); - } - return 0; - -#elif defined( HAVE_KERNEL_SCHEDULER_H ) - if( !p_condvar ) - { - return B_BAD_VALUE; - } - - if( p_condvar->init < 2000 ) - { - return B_NO_INIT; - } - - while( p_condvar->thread != -1 ) - { - thread_info info; - if( get_thread_info(p_condvar->thread, &info) == B_BAD_VALUE ) - { - return 0; - } - - if( info.state != B_THREAD_SUSPENDED ) - { - /* The waiting thread is not suspended so it could - * have been interrupted beetwen the unlock and the - * suspend_thread line. That is why we sleep a little - * before retesting p_condver->thread. */ - snooze( 10000 ); - } - else - { - /* Ok, we have to wake up that thread */ - resume_thread( p_condvar->thread ); - return 0; - } - } - return 0; - -#endif -} + pthread_cond_t cond; + vlc_object_t * p_this; +} vlc_cond_t; -/***************************************************************************** - * vlc_cond_broadcast: start all threads waiting on condition completion - *****************************************************************************/ -/* - * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME - * Only works with pthreads, you need to adapt it for others - * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME - */ -static inline int vlc_cond_broadcast( vlc_cond_t *p_condvar ) +typedef struct { -#if defined( PTH_INIT_IN_PTH_H ) - return pth_cond_notify( p_condvar, FALSE ); - -#elif defined( ST_INIT_IN_ST_H ) - return st_cond_broadcast( p_condvar ); - -#elif defined( WIN32 ) - /* Release all waiting threads. */ - int i; - - if( !p_condvar->semaphore ) - for( i = p_condvar->i_waiting_threads; i > 0; i-- ) - PulseEvent( p_condvar->event ); - else if( p_condvar->i_win9x_cv == 1 ) - { - /* Wait for the gate to be open */ - WaitForSingleObject( p_condvar->event, INFINITE ); - - if( p_condvar->i_waiting_threads ) - { - /* close gate */ - ResetEvent( p_condvar->event ); - - ReleaseSemaphore( p_condvar->semaphore, - p_condvar->i_waiting_threads, 0 ); - } - } - else - { - if( p_condvar->i_waiting_threads ) - { - ReleaseSemaphore( p_condvar->semaphore, - p_condvar->i_waiting_threads, 0 ); - /* Wait for the last thread to be awakened */ - WaitForSingleObject( p_condvar->event, INFINITE ); - } - } - - return 0; - -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) - return pthread_cond_broadcast( p_condvar ); + pthread_key_t handle; +} vlc_threadvar_t; #elif defined( HAVE_CTHREADS_H ) - /* condition_signal() */ - if ( p_condvar->queue.head || p_condvar->implications ) - { - cond_signal( (condition_t)p_condvar ); - } - return 0; +typedef cthread_t vlc_thread_t; -#elif defined( HAVE_KERNEL_SCHEDULER_H ) - if( !p_condvar ) - { - return B_BAD_VALUE; - } - - if( p_condvar->init < 2000 ) - { - return B_NO_INIT; - } - - while( p_condvar->thread != -1 ) - { - thread_info info; - if( get_thread_info(p_condvar->thread, &info) == B_BAD_VALUE ) - { - return 0; - } - - if( info.state != B_THREAD_SUSPENDED ) - { - /* The waiting thread is not suspended so it could - * have been interrupted beetwen the unlock and the - * suspend_thread line. That is why we sleep a little - * before retesting p_condver->thread. */ - snooze( 10000 ); - } - else - { - /* Ok, we have to wake up that thread */ - resume_thread( p_condvar->thread ); - return 0; - } - } - return 0; - -#endif -} - -/***************************************************************************** - * vlc_cond_wait: wait until condition completion - *****************************************************************************/ -#ifdef DEBUG -# define vlc_cond_wait( P_COND, P_MUTEX ) \ - __vlc_cond_wait( __FILE__, __LINE__, P_COND, P_MUTEX ) -#else -# define vlc_cond_wait( P_COND, P_MUTEX ) \ - __vlc_cond_wait( "(unknown)", 0, P_COND, P_MUTEX ) -#endif - -static inline int __vlc_cond_wait( char * psz_file, int i_line, - vlc_cond_t *p_condvar, vlc_mutex_t *p_mutex ) +/* 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 { -#if defined( PTH_INIT_IN_PTH_H ) - return pth_cond_await( p_condvar, p_mutex, NULL ); - -#elif defined( ST_INIT_IN_ST_H ) - int i_ret; - - st_mutex_unlock( *p_mutex ); - i_ret = st_cond_wait( *p_condvar ); - st_mutex_lock( *p_mutex ); - - return i_ret; - -#elif defined( WIN32 ) - if( !p_condvar->semaphore ) - { - /* Increase our wait count */ - p_condvar->i_waiting_threads++; - - if( p_condvar->SignalObjectAndWait && p_mutex->mutex ) - /* It is only possible to atomically release the mutex and initiate the - * waiting on WinNT/2K/XP. Win9x doesn't have SignalObjectAndWait(). */ - p_condvar->SignalObjectAndWait( p_mutex->mutex, - p_condvar->event, - INFINITE, FALSE ); - else - { - LeaveCriticalSection( &p_mutex->csection ); - WaitForSingleObject( p_condvar->event, INFINITE ); - } - - p_condvar->i_waiting_threads--; - } - else if( p_condvar->i_win9x_cv == 1 ) - { - int i_waiting_threads; - - /* Wait for the gate to be open */ - WaitForSingleObject( p_condvar->event, INFINITE ); - - /* Increase our wait count */ - p_condvar->i_waiting_threads++; - - LeaveCriticalSection( &p_mutex->csection ); - WaitForSingleObject( p_condvar->semaphore, INFINITE ); - - /* Decrement and test must be atomic */ - EnterCriticalSection( &p_condvar->csection ); - - /* Decrease our wait count */ - i_waiting_threads = --p_condvar->i_waiting_threads; - - LeaveCriticalSection( &p_condvar->csection ); - - /* Reopen the gate if we were the last waiting thread */ - if( !i_waiting_threads ) - SetEvent( p_condvar->event ); - } - else - { - int i_waiting_threads; - - /* Increase our wait count */ - p_condvar->i_waiting_threads++; - - LeaveCriticalSection( &p_mutex->csection ); - WaitForSingleObject( p_condvar->semaphore, INFINITE ); - - /* Decrement and test must be atomic */ - EnterCriticalSection( &p_condvar->csection ); - - /* Decrease our wait count */ - i_waiting_threads = --p_condvar->i_waiting_threads; - - LeaveCriticalSection( &p_condvar->csection ); - - /* Signal that the last waiting thread just went through */ - if( !i_waiting_threads ) - SetEvent( p_condvar->event ); - } - - /* Reacquire the mutex before returning. */ - vlc_mutex_lock( p_mutex ); - - return 0; - -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) + spin_lock_t held; + spin_lock_t lock; + char *name; + struct cthread_queue queue; -# ifdef DEBUG - /* In debug mode, timeout */ - struct timeval now; - struct timespec timeout; - int i_result; - - for( ; ; ) - { - gettimeofday( &now, NULL ); - timeout.tv_sec = now.tv_sec + THREAD_COND_TIMEOUT; - timeout.tv_nsec = now.tv_usec * 1000; - - i_result = pthread_cond_timedwait( p_condvar, p_mutex, &timeout ); - - if( i_result == ETIMEDOUT ) - { -#if 0 - msg_Warn( "thread %d: possible deadlock detected " - "in cond_wait at %s:%d (%s)", pthread_self(), - psz_file, i_line, strerror(i_result) ); -#endif - continue; - } - - if( i_result ) - { -#if 0 - msg_Err( "thread %d: cond_wait failed at %s:%d (%s)", - pthread_self(), psz_file, i_line, strerror(i_result) ); -#endif - } - return( i_result ); - } -# else - return pthread_cond_wait( p_condvar, p_mutex ); -# endif + vlc_object_t * p_this; +} vlc_mutex_t; -#elif defined( HAVE_CTHREADS_H ) - condition_wait( (condition_t)p_condvar, (mutex_t)p_mutex ); - return 0; +typedef struct +{ + spin_lock_t lock; + struct cthread_queue queue; + char *name; + struct cond_imp *implications; -#elif defined( HAVE_KERNEL_SCHEDULER_H ) - if( !p_condvar ) - { - return B_BAD_VALUE; - } - - if( !p_mutex ) - { - return B_BAD_VALUE; - } - - if( p_condvar->init < 2000 ) - { - return B_NO_INIT; - } - - /* The p_condvar->thread var is initialized before the unlock because - * it enables to identify when the thread is interrupted beetwen the - * unlock line and the suspend_thread line */ - p_condvar->thread = find_thread( NULL ); - vlc_mutex_unlock( p_mutex ); - suspend_thread( p_condvar->thread ); - p_condvar->thread = -1; - - vlc_mutex_lock( p_mutex ); - return 0; + vlc_object_t * p_this; +} vlc_cond_t; -#endif -} +typedef struct +{ + cthread_key_t handle; +} vlc_threadvar_t; -/***************************************************************************** - * vlc_cond_destroy: destroy a condition - *****************************************************************************/ -#ifdef DEBUG -# define vlc_cond_destroy( P_COND ) \ - __vlc_cond_destroy( __FILE__, __LINE__, P_COND ) -#else -# define vlc_cond_destroy( P_COND ) \ - __vlc_cond_destroy( "(unknown)", 0, P_COND ) #endif -/***************************************************************************** - * vlc_thread_create: create a thread - *****************************************************************************/ -# define vlc_thread_create( P_THIS, PSZ_NAME, FUNC, WAIT ) \ - __vlc_thread_create( VLC_OBJECT(P_THIS), __FILE__, __LINE__, PSZ_NAME, (void * ( * ) ( void * ))FUNC, WAIT ) - -/***************************************************************************** - * vlc_thread_ready: tell the parent thread we were successfully spawned - *****************************************************************************/ -# define vlc_thread_ready( P_THIS ) \ - __vlc_thread_ready( VLC_OBJECT(P_THIS) ) - -/***************************************************************************** - * vlc_thread_join: wait until a thread exits - *****************************************************************************/ -#ifdef DEBUG -# define vlc_thread_join( P_THIS ) \ - __vlc_thread_join( VLC_OBJECT(P_THIS), __FILE__, __LINE__ ) -#else -# define vlc_thread_join( P_THIS ) \ - __vlc_thread_join( VLC_OBJECT(P_THIS), "(unknown)", 0 ) #endif