X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=include%2Fvlc_threads.h;h=01e8b716aa389c84d993fc2f467fc78b48ea87b7;hb=d727c4590f83751a2f28fcdfd8af3886ebeb45d8;hp=af2d06cca19199af5a76e1f9bf7ee9055da4bb8b;hpb=2951522cbf7b77bb18e08b72fdd254a52534778c;p=vlc diff --git a/include/vlc_threads.h b/include/vlc_threads.h index af2d06cca1..01e8b716aa 100644 --- a/include/vlc_threads.h +++ b/include/vlc_threads.h @@ -2,8 +2,8 @@ * 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,v 1.21 2003/01/10 17:01:53 titer Exp $ + * Copyright (C) 1999, 2002 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 @@ -22,47 +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. *****************************************************************************/ -#include - -#if defined(GPROF) || defined(DEBUG) -# ifdef HAVE_SYS_TIME_H -# include -# endif -#endif - -#if defined( PTH_INIT_IN_PTH_H ) /* GNU Pth */ -# include +#ifndef _VLC_THREADS_H_ +#define _VLC_THREADS_H_ -#elif defined( ST_INIT_IN_ST_H ) /* State threads */ -# include - -#elif defined( UNDER_CE ) +#if defined( UNDER_CE ) /* WinCE API */ #elif defined( WIN32 ) # include /* Win32 API */ +# 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 - -#elif defined( HAVE_KERNEL_SCHEDULER_H ) /* BeOS */ +#elif defined( SYS_BEOS ) /* BeOS */ # include # include # include -#else -# error no threads available on your system ! +#else /* pthreads (like Linux & BSD) */ +# define LIBVLC_USE_PTHREAD 1 +# define _APPLE_C_SOURCE 1 /* Proper pthread semantics on OSX */ + +# include /* lldiv_t definition (only in C99) */ +# include /* _POSIX_SPIN_LOCKS */ +# include + /* Needed for pthread_cond_timedwait */ +# include +# include #endif @@ -71,39 +57,51 @@ *****************************************************************************/ /* Thread priorities */ -#ifdef SYS_DARWIN -# define VLC_THREAD_PRIORITY_LOW 31 -# define VLC_THREAD_PRIORITY_INPUT 35 -# define VLC_THREAD_PRIORITY_AUDIO 36 -# define VLC_THREAD_PRIORITY_VIDEO 31 -# define VLC_THREAD_PRIORITY_OUTPUT 31 +#ifdef __APPLE__ +# define VLC_THREAD_PRIORITY_LOW 0 +# define VLC_THREAD_PRIORITY_INPUT 22 +# define VLC_THREAD_PRIORITY_AUDIO 22 +# define VLC_THREAD_PRIORITY_VIDEO 0 +# define VLC_THREAD_PRIORITY_OUTPUT 22 +# define VLC_THREAD_PRIORITY_HIGHEST 22 + +#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(LIBVLC_USE_PTHREAD) +# define VLC_THREAD_PRIORITY_LOW 0 +# define VLC_THREAD_PRIORITY_INPUT 10 +# define VLC_THREAD_PRIORITY_AUDIO 5 +# define VLC_THREAD_PRIORITY_VIDEO 0 +# define VLC_THREAD_PRIORITY_OUTPUT 15 +# define VLC_THREAD_PRIORITY_HIGHEST 20 #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_TIME_CRITICAL : 0) + (IS_WINNT ? THREAD_PRIORITY_ABOVE_NORMAL : 0) # define VLC_THREAD_PRIORITY_AUDIO \ (IS_WINNT ? THREAD_PRIORITY_HIGHEST : 0) -# define VLC_THREAD_PRIORITY_VIDEO 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) -#elif defined(SYS_BEOS) -# define VLC_THREAD_PRIORITY_LOW 5 -# define VLC_THREAD_PRIORITY_INPUT 10 -# define VLC_THREAD_PRIORITY_AUDIO 120 -# define VLC_THREAD_PRIORITY_VIDEO 15 -# define VLC_THREAD_PRIORITY_OUTPUT 15 - #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 @@ -111,122 +109,498 @@ * 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; +#if defined (LIBVLC_USE_PTHREAD) +typedef pthread_t vlc_thread_t; +typedef pthread_mutex_t vlc_mutex_t; +typedef pthread_cond_t vlc_cond_t; +typedef pthread_key_t vlc_threadvar_t; + +#elif defined( WIN32 ) || defined( UNDER_CE ) +typedef HANDLE vlc_thread_t; + +typedef BOOL (WINAPI *SIGNALOBJECTANDWAIT) ( HANDLE, HANDLE, DWORD, BOOL ); + +typedef HANDLE vlc_mutex_t; + typedef struct { - pth_cond_t cond; - vlc_object_t * p_this; + volatile int i_waiting_threads; + HANDLE event; } vlc_cond_t; -#elif defined( ST_INIT_IN_ST_H ) -typedef st_thread_t vlc_thread_t; +typedef DWORD vlc_threadvar_t; + +#elif defined( SYS_BEOS ) +/* 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 we need */ + +typedef thread_id vlc_thread_t; + typedef struct { - st_mutex_t mutex; - vlc_object_t * p_this; + int32_t init; + sem_id lock; } vlc_mutex_t; + typedef struct { - st_cond_t cond; - vlc_object_t * p_this; + int32_t init; + thread_id thread; } 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_threadvar_t; - vlc_object_t * p_this; -} vlc_mutex_t; +#endif -typedef struct +#if defined( WIN32 ) && !defined ETIMEDOUT +# define ETIMEDOUT 10060 /* This is the value in winsock.h. */ +#endif + +/***************************************************************************** + * Function definitions + *****************************************************************************/ +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 * , void (*) (void *) ) ); +VLC_EXPORT( void, vlc_threadvar_delete, (vlc_threadvar_t *) ); +VLC_EXPORT( int, __vlc_thread_create, ( vlc_object_t *, const char *, int, const char *, void * ( * ) ( void * ), int, bool ) ); +VLC_EXPORT( int, __vlc_thread_set_priority, ( vlc_object_t *, const char *, int, int ) ); +VLC_EXPORT( void, __vlc_thread_join, ( vlc_object_t *, const char *, int ) ); + +#define vlc_thread_ready vlc_object_signal + +/***************************************************************************** + * vlc_mutex_lock: lock a mutex + *****************************************************************************/ +#define vlc_mutex_lock( P_MUTEX ) \ + __vlc_mutex_lock( __FILE__, __LINE__, P_MUTEX ) + +VLC_EXPORT(void, vlc_pthread_fatal, (const char *action, int error, const char *file, unsigned line)); + +#if defined(LIBVLC_USE_PTHREAD) +# define VLC_THREAD_ASSERT( action ) \ + if (val) \ + vlc_pthread_fatal (action, val, psz_file, i_line) +#else +# define VLC_THREAD_ASSERT ((void)(val)) +#endif + +static inline void __vlc_mutex_lock( const char * psz_file, int i_line, + vlc_mutex_t * p_mutex ) { - 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; +#if defined(LIBVLC_USE_PTHREAD) +# define vlc_assert_locked( m ) \ + assert (pthread_mutex_lock (m) == EDEADLK) + int val = pthread_mutex_lock( p_mutex ); + VLC_THREAD_ASSERT ("locking mutex"); - vlc_object_t * p_this; -} vlc_cond_t; +#elif defined( UNDER_CE ) + (void)psz_file; (void)i_line; -#elif defined( PTHREAD_COND_T_IN_PTHREAD_H ) -typedef pthread_t vlc_thread_t; -typedef struct + EnterCriticalSection( &p_mutex->csection ); + +#elif defined( WIN32 ) + (void)psz_file; (void)i_line; + + WaitForSingleObject( *p_mutex, INFINITE ); + +#elif defined( SYS_BEOS ) + acquire_sem( p_mutex->lock ); + +#endif +} + +#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 void __vlc_mutex_unlock( const char * psz_file, int i_line, + vlc_mutex_t *p_mutex ) { - pthread_mutex_t mutex; - vlc_object_t * p_this; -} vlc_mutex_t; -typedef struct +#if defined(LIBVLC_USE_PTHREAD) + int val = pthread_mutex_unlock( p_mutex ); + VLC_THREAD_ASSERT ("unlocking mutex"); + +#elif defined( UNDER_CE ) + (void)psz_file; (void)i_line; + + LeaveCriticalSection( &p_mutex->csection ); + +#elif defined( WIN32 ) + (void)psz_file; (void)i_line; + + ReleaseMutex( *p_mutex ); + +#elif defined( SYS_BEOS ) + release_sem( p_mutex->lock ); + +#endif +} + +/***************************************************************************** + * vlc_mutex_destroy: destroy a mutex + *****************************************************************************/ +#define vlc_mutex_destroy( P_MUTEX ) \ + __vlc_mutex_destroy( __FILE__, __LINE__, P_MUTEX ) + +/***************************************************************************** + * vlc_cond_init: initialize a condition + *****************************************************************************/ +#define vlc_cond_init( P_THIS, P_COND ) \ + __vlc_cond_init( P_COND ) + +/***************************************************************************** + * vlc_cond_signal: start a thread on condition completion + *****************************************************************************/ +#define vlc_cond_signal( P_COND ) \ + __vlc_cond_signal( __FILE__, __LINE__, P_COND ) + +static inline void __vlc_cond_signal( const char * psz_file, int i_line, + vlc_cond_t *p_condvar ) { - pthread_cond_t cond; - vlc_object_t * p_this; -} vlc_cond_t; +#if defined(LIBVLC_USE_PTHREAD) + int val = pthread_cond_signal( p_condvar ); + VLC_THREAD_ASSERT ("signaling condition variable"); + +#elif defined( UNDER_CE ) || defined( WIN32 ) + (void)psz_file; (void)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 */ + /* 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 ); + +#elif defined( SYS_BEOS ) + 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 + { + /* Ok, we have to wake up that thread */ + resume_thread( p_condvar->thread ); + } + } -#elif defined( HAVE_CTHREADS_H ) -typedef cthread_t vlc_thread_t; +#endif +} -/* 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 +/***************************************************************************** + * vlc_cond_wait: wait until condition completion + *****************************************************************************/ +#define vlc_cond_wait( P_COND, P_MUTEX ) \ + __vlc_cond_wait( __FILE__, __LINE__, P_COND, P_MUTEX ) + +static inline void __vlc_cond_wait( const char * psz_file, int i_line, + vlc_cond_t *p_condvar, vlc_mutex_t *p_mutex ) { - spin_lock_t held; - spin_lock_t lock; - char *name; - struct cthread_queue queue; +#if defined(LIBVLC_USE_PTHREAD) + int val = pthread_cond_wait( p_condvar, p_mutex ); + VLC_THREAD_ASSERT ("waiting on condition"); - vlc_object_t * p_this; -} vlc_mutex_t; +#elif defined( UNDER_CE ) + p_condvar->i_waiting_threads++; + LeaveCriticalSection( &p_mutex->csection ); + WaitForSingleObject( p_condvar->event, INFINITE ); + p_condvar->i_waiting_threads--; -typedef struct + /* Reacquire the mutex before returning. */ + vlc_mutex_lock( p_mutex ); + +#elif defined( WIN32 ) + (void)psz_file; (void)i_line; + + /* Increase our wait count */ + p_condvar->i_waiting_threads++; + SignalObjectAndWait( *p_mutex, p_condvar->event, INFINITE, FALSE ); + p_condvar->i_waiting_threads--; + + /* Reacquire the mutex before returning. */ + vlc_mutex_lock( p_mutex ); + +#elif defined( SYS_BEOS ) + /* 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 ); + +#endif +} + + +/***************************************************************************** + * 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_timedwait( P_COND, P_MUTEX, DEADLINE ) \ + __vlc_cond_timedwait( __FILE__, __LINE__, P_COND, P_MUTEX, DEADLINE ) + +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 ) { - spin_lock_t lock; - struct cthread_queue queue; - char *name; - struct cond_imp *implications; +#if defined(LIBVLC_USE_PTHREAD) + lldiv_t d = lldiv( deadline, 1000000 ); + struct timespec ts = { d.quot, d.rem * 1000 }; - vlc_object_t * p_this; -} vlc_cond_t; + int val = pthread_cond_timedwait (p_condvar, p_mutex, &ts); + if (val == ETIMEDOUT) + return ETIMEDOUT; /* this error is perfectly normal */ + VLC_THREAD_ASSERT ("timed-waiting on condition"); -#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 */ +#elif defined( UNDER_CE ) + mtime_t delay_ms = (deadline - mdate())/1000; + DWORD result; + if( delay_ms < 0 ) + delay_ms = 0; -typedef thread_id vlc_thread_t; + p_condvar->i_waiting_threads++; + LeaveCriticalSection( &p_mutex->csection ); + result = WaitForSingleObject( p_condvar->event, delay_ms ); + p_condvar->i_waiting_threads--; -typedef struct + /* Reacquire the mutex before returning. */ + vlc_mutex_lock( p_mutex ); + + if(result == WAIT_TIMEOUT) + return ETIMEDOUT; /* this error is perfectly normal */ + + (void)psz_file; (void)i_line; + +#elif defined( WIN32 ) + mtime_t delay_ms = (deadline - mdate())/1000; + DWORD result; + if( delay_ms < 0 ) + delay_ms = 0; + + /* Increase our wait count */ + p_condvar->i_waiting_threads++; + result = SignalObjectAndWait( *p_mutex, p_condvar->event, + delay_ms, FALSE ); + p_condvar->i_waiting_threads--; + + /* Reacquire the mutex before returning. */ + vlc_mutex_lock( p_mutex ); + if(result == WAIT_TIMEOUT) + return ETIMEDOUT; /* this error is perfectly normal */ + + (void)psz_file; (void)i_line; + +#elif defined( SYS_BEOS ) +# error Unimplemented + +#endif + + return 0; +} + +/***************************************************************************** + * vlc_cond_destroy: destroy a condition + *****************************************************************************/ +#define vlc_cond_destroy( P_COND ) \ + __vlc_cond_destroy( __FILE__, __LINE__, P_COND ) + +/***************************************************************************** + * 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 ) { - int32 init; - sem_id lock; + int i_ret; - vlc_object_t * p_this; -} vlc_mutex_t; +#if defined(LIBVLC_USE_PTHREAD) + i_ret = pthread_setspecific( *p_tls, p_value ); -typedef struct +#elif defined( SYS_BEOS ) + i_ret = EINVAL; + +#elif defined( UNDER_CE ) || defined( WIN32 ) + i_ret = TlsSetValue( *p_tls, p_value ) ? EINVAL : 0; + +#endif + + return i_ret; +} + +/***************************************************************************** + * vlc_threadvar_get: create: get the value of a thread-local variable + *****************************************************************************/ +static inline void* vlc_threadvar_get( vlc_threadvar_t * p_tls ) { - int32 init; - thread_id thread; + void *p_ret; - vlc_object_t * p_this; -} vlc_cond_t; +#if defined(LIBVLC_USE_PTHREAD) + p_ret = pthread_getspecific( *p_tls ); + +#elif defined( SYS_BEOS ) + p_ret = NULL; + +#elif defined( UNDER_CE ) || defined( WIN32 ) + p_ret = TlsGetValue( *p_tls ); #endif + return p_ret; +} + +# if defined (_POSIX_SPIN_LOCKS) && ((_POSIX_SPIN_LOCKS - 0) > 0) +typedef pthread_spinlock_t vlc_spinlock_t; + +/** + * Initializes a spinlock. + */ +static inline int vlc_spin_init (vlc_spinlock_t *spin) +{ + return pthread_spin_init (spin, PTHREAD_PROCESS_PRIVATE); +} + +/** + * Acquires a spinlock. + */ +static inline void vlc_spin_lock (vlc_spinlock_t *spin) +{ + pthread_spin_lock (spin); +} + +/** + * Releases a spinlock. + */ +static inline void vlc_spin_unlock (vlc_spinlock_t *spin) +{ + pthread_spin_unlock (spin); +} + +/** + * Deinitializes a spinlock. + */ +static inline void vlc_spin_destroy (vlc_spinlock_t *spin) +{ + pthread_spin_destroy (spin); +} + +#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 + +/** + * Issues a full memory barrier. + */ +#if defined (__APPLE__) +# include /* OSMemoryBarrier() */ +#endif +static inline void barrier (void) +{ +#if defined (__GNUC__) && (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) + __sync_synchronize (); +#elif defined(__APPLE__) + OSMemoryBarrier (); +#elif defined(__powerpc__) + asm volatile ("sync":::"memory"); +#elif defined(__i386__) + asm volatile ("mfence":::"memory"); +#elif defined (LIBVLC_USE_PTHREAD) + static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; + pthread_mutex_lock (&lock); + pthread_mutex_unlock (&lock); +#else +# error barrier not implemented! +#endif +} + +/***************************************************************************** + * vlc_thread_create: create a thread + *****************************************************************************/ +#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_join: wait until a thread exits + *****************************************************************************/ +#define vlc_thread_join( P_THIS ) \ + __vlc_thread_join( VLC_OBJECT(P_THIS), __FILE__, __LINE__ ) + +#endif /* !_VLC_THREADS_H */