X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=include%2Fvlc_threads_funcs.h;h=7add0dcc66cd69b45675e45ee751c35fafc76607;hb=6b8e5d9bc6fcc4fe2284cbf37709d3b1317473dd;hp=a5ae6f5e294190d35102189f7da9236a0e8235c5;hpb=3ca7825a92ed7e8de3bbccc274aa41045e8816b4;p=vlc diff --git a/include/vlc_threads_funcs.h b/include/vlc_threads_funcs.h index a5ae6f5e29..7add0dcc66 100644 --- a/include/vlc_threads_funcs.h +++ b/include/vlc_threads_funcs.h @@ -2,8 +2,8 @@ * vlc_threads_funcs.h : threads implementation for the VideoLAN client * This header provides a portable threads implementation. ***************************************************************************** - * Copyright (C) 1999, 2002 VideoLAN - * $Id: vlc_threads_funcs.h,v 1.6 2002/10/15 08:35:24 sam Exp $ + * Copyright (C) 1999-2007 the VideoLAN team + * $Id$ * * Authors: Jean-Marc Dressler * Samuel Hocevar @@ -14,7 +14,7 @@ * 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 @@ -22,21 +22,33 @@ * * 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_THREADFUNCS_H_ +#define _VLC_THREADFUNCS_H_ + +#if defined( WIN32 ) && !defined ETIMEDOUT +# define ETIMEDOUT 10060 /* This is the value in winsock.h. */ +#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 * ), int, vlc_bool_t ) ); +VLC_EXPORT( int, __vlc_mutex_init, ( vlc_mutex_t * ) ); +VLC_EXPORT( int, __vlc_mutex_init_recursive, ( vlc_mutex_t * ) ); +VLC_EXPORT( void, __vlc_mutex_destroy, ( const char *, int, vlc_mutex_t * ) ); +VLC_EXPORT( int, __vlc_cond_init, ( vlc_cond_t * ) ); +VLC_EXPORT( void, __vlc_cond_destroy, ( const char *, int, vlc_cond_t * ) ); +VLC_EXPORT( int, __vlc_threadvar_create, (vlc_threadvar_t * ) ); +VLC_EXPORT( int, __vlc_thread_create, ( vlc_object_t *, const char *, int, const char *, void * ( * ) ( void * ), int, vlc_bool_t ) ); +VLC_EXPORT( int, __vlc_thread_set_priority, ( vlc_object_t *, const char *, int, int ) ); VLC_EXPORT( void, __vlc_thread_ready, ( vlc_object_t * ) ); -VLC_EXPORT( void, __vlc_thread_join, ( vlc_object_t *, char *, int ) ); +VLC_EXPORT( void, __vlc_thread_join, ( vlc_object_t *, const char *, int ) ); /***************************************************************************** * vlc_threads_init: initialize threads system @@ -54,7 +66,13 @@ VLC_EXPORT( void, __vlc_thread_join, ( vlc_object_t *, char *, int ) ); * 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_init( P_MUTEX ) + +/***************************************************************************** + * vlc_mutex_init: initialize a recursive mutex (Don't use it) + *****************************************************************************/ +#define vlc_mutex_init_recursive( P_THIS, P_MUTEX ) \ + __vlc_mutex_init_recursive( P_MUTEX ) /***************************************************************************** * vlc_mutex_lock: lock a mutex @@ -62,134 +80,78 @@ VLC_EXPORT( void, __vlc_thread_join, ( vlc_object_t *, char *, int ) ); #define vlc_mutex_lock( P_MUTEX ) \ __vlc_mutex_lock( __FILE__, __LINE__, P_MUTEX ) -static inline int __vlc_mutex_lock( char * psz_file, int i_line, +#if defined(LIBVLC_USE_PTHREAD) +VLC_EXPORT(void, vlc_pthread_fatal, (const char *action, int error, const char *file, unsigned line)); + +# define VLC_THREAD_ASSERT( action ) \ + if (val) \ + vlc_pthread_fatal (action, val, psz_file, i_line) +#else +# define VLC_THREAD_ASSERT (void)0 +#endif + +static inline void __vlc_mutex_lock( const char * psz_file, int i_line, vlc_mutex_t * p_mutex ) { - int i_result; - /* In case of error : */ - int i_thread = -1; - const char * psz_error = ""; - -#if defined( PTH_INIT_IN_PTH_H ) - i_result = pth_mutex_acquire( &p_mutex->mutex, TRUE, NULL ); +#if defined( UNDER_CE ) + VLC_UNUSED( psz_file); VLC_UNUSED( i_line ); -#elif defined( ST_INIT_IN_ST_H ) - i_result = st_mutex_lock( p_mutex->mutex ); + EnterCriticalSection( &p_mutex->csection ); #elif defined( WIN32 ) + VLC_UNUSED( psz_file); VLC_UNUSED( i_line ); + if( p_mutex->mutex ) - { WaitForSingleObject( p_mutex->mutex, INFINITE ); - } else - { EnterCriticalSection( &p_mutex->csection ); - } - return 0; -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) - i_result = pthread_mutex_lock( &p_mutex->mutex ); - if ( i_result ) - { - i_thread = (int)pthread_self(); - psz_error = strerror(i_result); - } +#elif defined( HAVE_KERNEL_SCHEDULER_H ) + acquire_sem( p_mutex->lock ); -#elif defined( HAVE_CTHREADS_H ) - mutex_lock( p_mutex->mutex ); - return 0; +#elif defined(LIBVLC_USE_PTHREAD) +# define vlc_assert_locked( m ) \ + assert (pthread_mutex_lock (&((m)->mutex)) == EDEADLK) + int val = pthread_mutex_lock( &p_mutex->mutex ); + VLC_THREAD_ASSERT ("locking mutex"); -#elif defined( HAVE_KERNEL_SCHEDULER_H ) - if( p_mutex == NULL ) - { - i_result = B_BAD_VALUE; - } - else if( p_mutex->init < 2000 ) - { - i_result = B_NO_INIT; - } - else - { - i_result = acquire_sem( p_mutex->lock ); - } #endif - - if( i_result ) - { - msg_Err( p_mutex->p_this, - "thread %d: mutex_lock failed at %s:%d (%d:%s)", - i_thread, psz_file, i_line, i_result, psz_error ); - } - return i_result; } +#ifndef vlc_assert_locked +# define vlc_assert_locked( m ) (void)0 +#endif + /***************************************************************************** * vlc_mutex_unlock: unlock a mutex *****************************************************************************/ #define vlc_mutex_unlock( P_MUTEX ) \ __vlc_mutex_unlock( __FILE__, __LINE__, P_MUTEX ) -static inline int __vlc_mutex_unlock( char * psz_file, int i_line, +static inline void __vlc_mutex_unlock( const char * psz_file, int i_line, vlc_mutex_t *p_mutex ) { - int i_result; - /* In case of error : */ - int i_thread = -1; - const char * psz_error = ""; - -#if defined( PTH_INIT_IN_PTH_H ) - i_result = pth_mutex_release( &p_mutex->mutex ); +#if defined( UNDER_CE ) + VLC_UNUSED( psz_file); VLC_UNUSED( i_line ); -#elif defined( ST_INIT_IN_ST_H ) - i_result = st_mutex_unlock( p_mutex->mutex ); + LeaveCriticalSection( &p_mutex->csection ); #elif defined( WIN32 ) + VLC_UNUSED( psz_file); VLC_UNUSED( i_line ); + if( p_mutex->mutex ) - { ReleaseMutex( p_mutex->mutex ); - } else - { LeaveCriticalSection( &p_mutex->csection ); - } - return 0; - -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) - i_result = pthread_mutex_unlock( &p_mutex->mutex ); - if ( i_result ) - { - i_thread = (int)pthread_self(); - psz_error = strerror(i_result); - } - -#elif defined( HAVE_CTHREADS_H ) - mutex_unlock( p_mutex ); - return 0; #elif defined( HAVE_KERNEL_SCHEDULER_H ) - if( p_mutex == NULL ) - { - i_result = B_BAD_VALUE; - } - else if( p_mutex->init < 2000 ) - { - i_result = B_NO_INIT; - } - else - { - release_sem( p_mutex->lock ); - return B_OK; - } -#endif + release_sem( p_mutex->lock ); - if( i_result ) - { - msg_Err( p_mutex->p_this, - "thread %d: mutex_unlock failed at %s:%d (%d:%s)", - i_thread, psz_file, i_line, i_result, psz_error ); - } +#elif defined(LIBVLC_USE_PTHREAD) + int val = pthread_mutex_unlock( &p_mutex->mutex ); + VLC_THREAD_ASSERT ("unlocking mutex"); - return i_result; +#endif } /***************************************************************************** @@ -202,7 +164,7 @@ static inline int __vlc_mutex_unlock( char * psz_file, int i_line, * 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_init( P_COND ) /***************************************************************************** * vlc_cond_signal: start a thread on condition completion @@ -210,26 +172,25 @@ static inline int __vlc_mutex_unlock( char * psz_file, int i_line, #define vlc_cond_signal( P_COND ) \ __vlc_cond_signal( __FILE__, __LINE__, P_COND ) -static inline int __vlc_cond_signal( char * psz_file, int i_line, - vlc_cond_t *p_condvar ) +static inline void __vlc_cond_signal( const char * psz_file, int i_line, + vlc_cond_t *p_condvar ) { - int i_result; - /* In case of error : */ - int i_thread = -1; - const char * psz_error = ""; +#if defined( UNDER_CE ) + VLC_UNUSED( psz_file); VLC_UNUSED( i_line ); -#if defined( PTH_INIT_IN_PTH_H ) - i_result = pth_cond_notify( &p_condvar->cond, FALSE ); - -#elif defined( ST_INIT_IN_ST_H ) - i_result = st_cond_signal( p_condvar->cond ); + PulseEvent( p_condvar->event ); #elif defined( WIN32 ) + VLC_UNUSED( psz_file); VLC_UNUSED( i_line ); + /* 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() only works if none of the waiting threads is suspended. + * This is particularily problematic under a debug session. + * as documented in http://support.microsoft.com/kb/q173260/ */ PulseEvent( p_condvar->event ); } else if( p_condvar->i_win9x_cv == 1 ) @@ -263,229 +224,189 @@ static inline int __vlc_cond_signal( char * psz_file, int i_line, WaitForSingleObject( p_condvar->event, INFINITE ); } } - return 0; - -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) - i_result = pthread_cond_signal( &p_condvar->cond ); - if ( i_result ) - { - i_thread = (int)pthread_self(); - psz_error = strerror(i_result); - } - -#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 == NULL ) + while( p_condvar->thread != -1 ) { - i_result = B_BAD_VALUE; - } - else if( p_condvar->init < 2000 ) - { - i_result = B_NO_INIT; - } - else - { - while( p_condvar->thread != -1 ) + thread_info info; + if( get_thread_info(p_condvar->thread, &info) == B_BAD_VALUE ) + return; + + 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 { - 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; - } + /* Ok, we have to wake up that thread */ + resume_thread( p_condvar->thread ); } } -#endif - if( i_result ) - { - msg_Err( p_condvar->p_this, - "thread %d: cond_signal failed at %s:%d (%d:%s)", - i_thread, psz_file, i_line, i_result, psz_error ); - } +#elif defined(LIBVLC_USE_PTHREAD) + int val = pthread_cond_signal( &p_condvar->cond ); + VLC_THREAD_ASSERT ("signaling condition variable"); - return i_result; +#endif } /***************************************************************************** - * vlc_cond_broadcast: start all threads waiting on condition completion + * vlc_cond_wait: wait until condition completion *****************************************************************************/ -/* - * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME - * Only works with pthreads, st, win32 - * You need to adapt it for others - * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME - */ -#define vlc_cond_broadcast( P_COND ) \ - __vlc_cond_broadcast( __FILE__, __LINE__, P_COND ) +#define vlc_cond_wait( P_COND, P_MUTEX ) \ + __vlc_cond_wait( __FILE__, __LINE__, P_COND, P_MUTEX ) -static inline int __vlc_cond_broadcast( char * psz_file, int i_line, - vlc_cond_t *p_condvar ) +static inline void __vlc_cond_wait( const char * psz_file, int i_line, + vlc_cond_t *p_condvar, vlc_mutex_t *p_mutex ) { - int i_result; - /* In case of error : */ - int i_thread = -1; - const char * psz_error = ""; +#if defined( UNDER_CE ) + p_condvar->i_waiting_threads++; + LeaveCriticalSection( &p_mutex->csection ); + WaitForSingleObject( p_condvar->event, INFINITE ); + p_condvar->i_waiting_threads--; -#if defined( PTH_INIT_IN_PTH_H ) - i_result = pth_cond_notify( &p_condvar->cond, FALSE ); - -#elif defined( ST_INIT_IN_ST_H ) - i_result = st_cond_broadcast( p_condvar->cond ); + /* Reacquire the mutex before returning. */ + vlc_mutex_lock( p_mutex ); #elif defined( WIN32 ) - int i; + VLC_UNUSED( psz_file); VLC_UNUSED( i_line ); - /* Release all waiting threads. */ if( !p_condvar->semaphore ) { - for( i = p_condvar->i_waiting_threads; i > 0; i-- ) + /* Increase our wait count */ + p_condvar->i_waiting_threads++; + + if( p_mutex->mutex ) { - PulseEvent( p_condvar->event ); + /* 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 ); - 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 ); + /* Increase our wait count */ + p_condvar->i_waiting_threads++; - /* 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, - p_condvar->i_waiting_threads, 0 ); - } + 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 { - if( p_condvar->i_waiting_threads ) - { - ReleaseSemaphore( p_condvar->semaphore, - p_condvar->i_waiting_threads, 0 ); + int i_waiting_threads; - /* Wait for the last thread to be awakened */ - WaitForSingleObject( p_condvar->event, INFINITE ); - } - } - return 0; + /* Increase our wait count */ + p_condvar->i_waiting_threads++; -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) - i_result = pthread_cond_broadcast( &p_condvar->cond ); - if ( i_result ) - { - i_thread = (int)pthread_self(); - psz_error = strerror(i_result); - } + LeaveCriticalSection( &p_mutex->csection ); + WaitForSingleObject( p_condvar->semaphore, INFINITE ); -#elif defined( HAVE_CTHREADS_H ) - /* condition_signal() */ - if ( p_condvar->queue.head || p_condvar->implications ) - { - cond_signal( (condition_t)p_condvar ); + /* 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 ); } - return 0; + + /* Reacquire the mutex before returning. */ + vlc_mutex_lock( p_mutex ); #elif defined( HAVE_KERNEL_SCHEDULER_H ) - if( p_condvar == NULL ) - { - i_result = B_BAD_VALUE; - } - else if( p_condvar->init < 2000 ) - { - i_result = B_NO_INIT; - } - else - { - 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; - } - } - } -#endif + /* 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; - if( i_result ) - { - msg_Err( p_condvar->p_this, - "thread %d: cond_broadcast failed at %s:%d (%d:%s)", - i_thread, psz_file, i_line, i_result, psz_error ); - } + vlc_mutex_lock( p_mutex ); + +#elif defined(LIBVLC_USE_PTHREAD) + int val = pthread_cond_wait( &p_condvar->cond, &p_mutex->mutex ); + VLC_THREAD_ASSERT ("waiting on condition"); - return i_result; +#endif } + /***************************************************************************** - * vlc_cond_wait: wait until condition completion + * vlc_cond_timedwait: wait until condition completion or expiration + ***************************************************************************** + * Returns 0 if object signaled, an error code in case of timeout or error. *****************************************************************************/ -#define vlc_cond_wait( P_COND, P_MUTEX ) \ - __vlc_cond_wait( __FILE__, __LINE__, P_COND, P_MUTEX ) +#define vlc_cond_timedwait( P_COND, P_MUTEX, DEADLINE ) \ + __vlc_cond_timedwait( __FILE__, __LINE__, P_COND, P_MUTEX, DEADLINE ) -static inline int __vlc_cond_wait( char * psz_file, int i_line, - vlc_cond_t *p_condvar, vlc_mutex_t *p_mutex ) +static inline int __vlc_cond_timedwait( const char * psz_file, int i_line, + vlc_cond_t *p_condvar, + vlc_mutex_t *p_mutex, + mtime_t deadline ) { - int i_result; - /* In case of error : */ - int i_thread = -1; - const char * psz_error = ""; +#if defined( UNDER_CE ) + mtime_t delay_ms = (deadline - mdate())/1000; + + DWORD result; + if( delay_ms < 0 ) + delay_ms = 0; -#if defined( PTH_INIT_IN_PTH_H ) - i_result = pth_cond_await( &p_condvar->cond, &p_mutex->mutex, NULL ); + p_condvar->i_waiting_threads++; + LeaveCriticalSection( &p_mutex->csection ); + result = WaitForSingleObject( p_condvar->event, delay_ms ); + p_condvar->i_waiting_threads--; -#elif defined( ST_INIT_IN_ST_H ) - st_mutex_unlock( p_mutex->mutex ); - i_result = st_cond_wait( p_condvar->cond ); - st_mutex_lock( p_mutex->mutex ); + /* Reacquire the mutex before returning. */ + vlc_mutex_lock( p_mutex ); + + if(result == WAIT_TIMEOUT) + return ETIMEDOUT; /* this error is perfectly normal */ #elif defined( WIN32 ) + VLC_UNUSED( psz_file); VLC_UNUSED( i_line ); + + DWORD result; + + mtime_t delay_ms = (deadline - mdate())/1000; + if( delay_ms < 0 ) + delay_ms = 0; + if( !p_condvar->semaphore ) { /* Increase our wait count */ @@ -496,14 +417,14 @@ static inline int __vlc_cond_wait( char * psz_file, int i_line, /* 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, + result = p_condvar->SignalObjectAndWait( p_mutex->mutex, p_condvar->event, - INFINITE, FALSE ); + delay_ms, FALSE ); } else { LeaveCriticalSection( &p_mutex->csection ); - WaitForSingleObject( p_condvar->event, INFINITE ); + result = WaitForSingleObject( p_condvar->event, delay_ms ); } p_condvar->i_waiting_threads--; @@ -513,13 +434,21 @@ static inline int __vlc_cond_wait( char * psz_file, int i_line, int i_waiting_threads; /* Wait for the gate to be open */ - WaitForSingleObject( p_condvar->event, INFINITE ); + result = WaitForSingleObject( p_condvar->event, delay_ms ); /* Increase our wait count */ p_condvar->i_waiting_threads++; LeaveCriticalSection( &p_mutex->csection ); - WaitForSingleObject( p_condvar->semaphore, INFINITE ); + if( !result ) + { + /* recaculate remaining delay */ + delay_ms = (deadline - mdate())/1000; + if( delay_ms < 0 ) + delay_ms = 0; + + result = WaitForSingleObject( p_condvar->semaphore, delay_ms ); + } /* Decrement and test must be atomic */ EnterCriticalSection( &p_condvar->csection ); @@ -541,7 +470,7 @@ static inline int __vlc_cond_wait( char * psz_file, int i_line, p_condvar->i_waiting_threads++; LeaveCriticalSection( &p_mutex->csection ); - WaitForSingleObject( p_condvar->semaphore, INFINITE ); + result = WaitForSingleObject( p_condvar->semaphore, delay_ms ); /* Decrement and test must be atomic */ EnterCriticalSection( &p_condvar->csection ); @@ -558,90 +487,171 @@ static inline int __vlc_cond_wait( char * psz_file, int i_line, /* Reacquire the mutex before returning. */ vlc_mutex_lock( p_mutex ); + if(result == WAIT_TIMEOUT) + return ETIMEDOUT; /* this error is perfectly normal */ - return 0; +#elif defined( HAVE_KERNEL_SCHEDULER_H ) +# error Unimplemented -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) +#elif defined(LIBVLC_USE_PTHREAD) + lldiv_t d = lldiv( deadline, 1000000 ); + struct timespec ts = { d.quot, d.rem * 1000 }; -# ifdef DEBUG - /* In debug mode, timeout */ - struct timeval now; - struct timespec timeout; + int val = pthread_cond_timedwait (&p_condvar->cond, &p_mutex->mutex, &ts); + if (val == ETIMEDOUT) + return ETIMEDOUT; /* this error is perfectly normal */ + VLC_THREAD_ASSERT ("timed-waiting on condition"); - for( ; ; ) - { - gettimeofday( &now, NULL ); - timeout.tv_sec = now.tv_sec + THREAD_COND_TIMEOUT; - timeout.tv_nsec = now.tv_usec * 1000; +#endif - i_result = pthread_cond_timedwait( &p_condvar->cond, &p_mutex->mutex, - &timeout ); + return 0; +} - if( i_result == ETIMEDOUT ) - { - msg_Warn( p_condvar->p_this, - "thread %d: possible deadlock detected " - "in cond_wait at %s:%d (%s)", pthread_self(), - psz_file, i_line, strerror(i_result) ); - } - else break; - } -# else - i_result = pthread_cond_wait( &p_condvar->cond, &p_mutex->mutex ); -# endif +/***************************************************************************** + * vlc_cond_destroy: destroy a condition + *****************************************************************************/ +#define vlc_cond_destroy( P_COND ) \ + __vlc_cond_destroy( __FILE__, __LINE__, P_COND ) - if ( i_result ) - { - i_thread = (int)pthread_self(); - psz_error = strerror(i_result); - } +/***************************************************************************** + * vlc_threadvar_create: create a thread-local variable + *****************************************************************************/ +#define vlc_threadvar_create( PTHIS, P_TLS ) \ + __vlc_threadvar_create( P_TLS ) -#elif defined( HAVE_CTHREADS_H ) - condition_wait( (condition_t)p_condvar, (mutex_t)p_mutex ); - return 0; +/***************************************************************************** + * vlc_threadvar_set: create: set the value of a thread-local variable + *****************************************************************************/ +static inline int vlc_threadvar_set( vlc_threadvar_t * p_tls, void *p_value ) +{ + int i_ret; -#elif defined( HAVE_KERNEL_SCHEDULER_H ) - if( p_condvar == NULL ) - { - i_result = B_BAD_VALUE; - } - else if( p_mutex == NULL ) - { - i_result = B_BAD_VALUE; - } - else if( p_condvar->init < 2000 ) - { - i_result = B_NO_INIT; - } +#if defined( HAVE_KERNEL_SCHEDULER_H ) + return -1; - /* 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; +#elif defined( UNDER_CE ) || defined( WIN32 ) + i_ret = ( TlsSetValue( p_tls->handle, p_value ) != 0 ); - vlc_mutex_lock( p_mutex ); - return 0; +#elif defined(LIBVLC_USE_PTHREAD) + i_ret = pthread_setspecific( p_tls->handle, p_value ); #endif - if( i_result ) - { - msg_Err( p_condvar->p_this, - "thread %d: cond_wait failed at %s:%d (%d:%s)", - i_thread, psz_file, i_line, i_result, psz_error ); - } - - return i_result; + return i_ret; } /***************************************************************************** - * vlc_cond_destroy: destroy a condition + * vlc_threadvar_get: create: get the value of a thread-local variable *****************************************************************************/ -#define vlc_cond_destroy( P_COND ) \ - __vlc_cond_destroy( __FILE__, __LINE__, P_COND ) +static inline void* vlc_threadvar_get( vlc_threadvar_t * p_tls ) +{ + void* p_ret; + +#if defined( HAVE_KERNEL_SCHEDULER_H ) + p_ret = NULL; +#elif defined( UNDER_CE ) || defined( WIN32 ) + p_ret = TlsGetValue( p_tls->handle ); + +#elif defined(LIBVLC_USE_PTHREAD) + p_ret = pthread_getspecific( p_tls->handle ); + +#endif + + return p_ret; +} + +# if defined (_POSIX_SPIN_LOCKS) && ((_POSIX_SPIN_LOCKS - 0) > 0) +typedef struct +{ + pthread_spinlock_t spin; +} vlc_spinlock_t; + +/** + * Initializes a spinlock. + */ +static inline int vlc_spin_init (vlc_spinlock_t *spin) +{ + return pthread_spin_init (&spin->spin, PTHREAD_PROCESS_PRIVATE); +} + +/** + * Acquires a spinlock. + */ +static inline void vlc_spin_lock (vlc_spinlock_t *spin) +{ + int val = pthread_spin_lock (&spin->spin); + assert (val == 0); +} + +/** + * Releases a spinlock. + */ +static inline void vlc_spin_unlock (vlc_spinlock_t *spin) +{ + int val = pthread_spin_unlock (&spin->spin); + assert (val == 0); +} + +/** + * Deinitializes a spinlock. + */ +static inline void vlc_spin_destroy (vlc_spinlock_t *spin) +{ + int val = pthread_spin_destroy (&spin->spin); + assert (val == 0); +} + +#elif defined( WIN32 ) + +typedef CRITICAL_SECTION vlc_spinlock_t; + +/** + * Initializes a spinlock. + */ +static inline int vlc_spin_init (vlc_spinlock_t *spin) +{ + return !InitializeCriticalSectionAndSpinCount(spin, 4000); +} + +/** + * Acquires a spinlock. + */ +static inline void vlc_spin_lock (vlc_spinlock_t *spin) +{ + EnterCriticalSection(spin); +} + +/** + * Releases a spinlock. + */ +static inline void vlc_spin_unlock (vlc_spinlock_t *spin) +{ + LeaveCriticalSection(spin); +} + +/** + * Deinitializes a spinlock. + */ +static inline void vlc_spin_destroy (vlc_spinlock_t *spin) +{ + DeleteCriticalSection(spin); +} + + +#else + +/* Fallback to plain mutexes if spinlocks are not available */ +typedef vlc_mutex_t vlc_spinlock_t; + +static inline int vlc_spin_init (vlc_spinlock_t *spin) +{ + return __vlc_mutex_init (spin); +} + +# define vlc_spin_lock vlc_mutex_lock +# define vlc_spin_unlock vlc_mutex_unlock +# define vlc_spin_destroy vlc_mutex_destroy +#endif /***************************************************************************** * vlc_thread_create: create a thread @@ -649,6 +659,12 @@ static inline int __vlc_cond_wait( char * psz_file, int i_line, #define vlc_thread_create( P_THIS, PSZ_NAME, FUNC, PRIORITY, WAIT ) \ __vlc_thread_create( VLC_OBJECT(P_THIS), __FILE__, __LINE__, PSZ_NAME, (void * ( * ) ( void * ))FUNC, PRIORITY, WAIT ) +/***************************************************************************** + * vlc_thread_set_priority: set the priority of the calling thread + *****************************************************************************/ +#define vlc_thread_set_priority( P_THIS, PRIORITY ) \ + __vlc_thread_set_priority( VLC_OBJECT(P_THIS), __FILE__, __LINE__, PRIORITY ) + /***************************************************************************** * vlc_thread_ready: tell the parent thread we were successfully spawned *****************************************************************************/ @@ -659,4 +675,6 @@ static inline int __vlc_cond_wait( char * psz_file, int i_line, * vlc_thread_join: wait until a thread exits *****************************************************************************/ #define vlc_thread_join( P_THIS ) \ - __vlc_thread_join( VLC_OBJECT(P_THIS), __FILE__, __LINE__ ) + __vlc_thread_join( VLC_OBJECT(P_THIS), __FILE__, __LINE__ ) + +#endif