1 /*****************************************************************************
2 * threads.c : threads implementation for the VideoLAN client
3 *****************************************************************************
4 * Copyright (C) 1999-2007 the VideoLAN team
7 * Authors: Jean-Marc Dressler <polux@via.ecp.fr>
8 * Samuel Hocevar <sam@zoy.org>
9 * Gildas Bazin <gbazin@netcourrier.com>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25 *****************************************************************************/
39 #define VLC_THREADS_UNINITIALIZED 0
40 #define VLC_THREADS_PENDING 1
41 #define VLC_THREADS_ERROR 2
42 #define VLC_THREADS_READY 3
44 /*****************************************************************************
45 * Global mutex for lazy initialization of the threads system
46 *****************************************************************************/
47 static volatile unsigned i_initializations = 0;
48 static volatile int i_status = VLC_THREADS_UNINITIALIZED;
49 static vlc_object_t *p_root;
51 #if defined( UNDER_CE )
52 #elif defined( WIN32 )
54 /* following is only available on NT/2000/XP and above */
55 static SIGNALOBJECTANDWAIT pf_SignalObjectAndWait = NULL;
58 ** On Windows NT/2K/XP we use a slow mutex implementation but which
59 ** allows us to correctly implement condition variables.
60 ** You can also use the faster Win9x implementation but you might
61 ** experience problems with it.
63 static vlc_bool_t b_fast_mutex = VLC_FALSE;
65 ** On Windows 9x/Me you can use a fast but incorrect condition variables
66 ** implementation (more precisely there is a possibility for a race
67 ** condition to happen).
68 ** However it is possible to use slower alternatives which are more robust.
69 ** Currently you can choose between implementation 0 (which is the
70 ** fastest but slightly incorrect), 1 (default) and 2.
72 static int i_win9x_cv = 1;
74 #elif defined( HAVE_KERNEL_SCHEDULER_H )
75 #elif defined( LIBVLC_USE_PTHREAD )
76 static pthread_mutex_t once_mutex = PTHREAD_MUTEX_INITIALIZER;
79 vlc_threadvar_t msg_context_global_key;
81 #if defined(LIBVLC_USE_PTHREAD)
82 static inline unsigned long vlc_threadid (void)
84 union { pthread_t th; unsigned long int i; } v = { };
85 v.th = pthread_self ();
90 /*****************************************************************************
91 * vlc_thread_fatal: Report an error from the threading layer
92 *****************************************************************************
93 * This is mostly meant for debugging.
94 *****************************************************************************/
95 void vlc_pthread_fatal (const char *action, int error,
96 const char *file, unsigned line)
101 fprintf (stderr, "LibVLC fatal error %s in thread %lu at %s:%u: %d\n",
102 action, vlc_threadid (), file, line, error);
105 /* Sometimes strerror_r() crashes too, so make sure we print an error
106 * message before we invoke it */
107 #ifdef __GLIBC__ && _POSIX_C_SOURCE < 200112L && _XOPEN_SOURCE < 600 && _GNU_SOURCE
108 /* use GNU prototype */
109 msg = strerror_r (error, buf, sizeof (buf));
112 if (!strerror_r (error, buf, sizeof (buf)))
114 fprintf (stderr, "Error description: \"%s\"\n", msg ? msg : "(null)");
121 /*****************************************************************************
122 * vlc_threads_init: initialize threads system
123 *****************************************************************************
124 * This function requires lazy initialization of a global lock in order to
125 * keep the library really thread-safe. Some architectures don't support this
126 * and thus do not guarantee the complete reentrancy.
127 *****************************************************************************/
128 int __vlc_threads_init( vlc_object_t *p_this )
130 libvlc_global_data_t *p_libvlc_global = (libvlc_global_data_t *)p_this;
131 int i_ret = VLC_SUCCESS;
133 /* If we have lazy mutex initialization, use it. Otherwise, we just
134 * hope nothing wrong happens. */
135 #if defined( UNDER_CE )
136 #elif defined( WIN32 )
137 if( IsDebuggerPresent() )
139 /* SignalObjectAndWait() is problematic under a debugger */
140 b_fast_mutex = VLC_TRUE;
143 #elif defined( HAVE_KERNEL_SCHEDULER_H )
144 #elif defined( LIBVLC_USE_PTHREAD )
145 pthread_mutex_lock( &once_mutex );
148 if( i_status == VLC_THREADS_UNINITIALIZED )
150 i_status = VLC_THREADS_PENDING;
152 /* We should be safe now. Do all the initialization stuff we want. */
153 p_libvlc_global->b_ready = VLC_FALSE;
155 #if defined( UNDER_CE )
156 /* Nothing to initialize */
158 #elif defined( WIN32 )
159 /* Dynamically get the address of SignalObjectAndWait */
160 if( GetVersion() < 0x80000000 )
164 /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
165 hInstLib = LoadLibrary( "kernel32" );
168 pf_SignalObjectAndWait =
169 (SIGNALOBJECTANDWAIT)GetProcAddress( hInstLib,
170 "SignalObjectAndWait" );
174 #elif defined( HAVE_KERNEL_SCHEDULER_H )
175 #elif defined( LIBVLC_USE_PTHREAD )
178 p_root = vlc_object_create( p_libvlc_global, VLC_OBJECT_GLOBAL );
184 i_status = VLC_THREADS_ERROR;
189 i_status = VLC_THREADS_READY;
192 vlc_threadvar_create( p_root, &msg_context_global_key );
196 /* Just increment the initialization count */
200 /* If we have lazy mutex initialization support, unlock the mutex;
201 * otherwize, do a naive wait loop. */
202 #if defined( UNDER_CE )
203 while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
204 #elif defined( WIN32 )
205 while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
206 #elif defined( HAVE_KERNEL_SCHEDULER_H )
207 while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
208 #elif defined( LIBVLC_USE_PTHREAD )
209 pthread_mutex_unlock( &once_mutex );
212 if( i_status != VLC_THREADS_READY )
220 /*****************************************************************************
221 * vlc_threads_end: stop threads system
222 *****************************************************************************
223 * FIXME: This function is far from being threadsafe.
224 *****************************************************************************/
225 int __vlc_threads_end( vlc_object_t *p_this )
228 #if defined( UNDER_CE )
229 #elif defined( WIN32 )
230 #elif defined( HAVE_KERNEL_SCHEDULER_H )
231 #elif defined( LIBVLC_USE_PTHREAD )
232 pthread_mutex_lock( &once_mutex );
235 if( i_initializations == 0 )
239 if( i_initializations == 0 )
241 i_status = VLC_THREADS_UNINITIALIZED;
242 vlc_object_destroy( p_root );
245 #if defined( UNDER_CE )
246 #elif defined( WIN32 )
247 #elif defined( HAVE_KERNEL_SCHEDULER_H )
248 #elif defined( LIBVLC_USE_PTHREAD )
249 pthread_mutex_unlock( &once_mutex );
255 /* This is not prototyped under Linux, though it exists. */
256 int pthread_mutexattr_setkind_np( pthread_mutexattr_t *attr, int kind );
259 /*****************************************************************************
260 * vlc_mutex_init: initialize a mutex
261 *****************************************************************************/
262 int __vlc_mutex_init( vlc_mutex_t *p_mutex )
264 #if defined( UNDER_CE )
265 InitializeCriticalSection( &p_mutex->csection );
268 #elif defined( WIN32 )
269 /* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
270 * function and have a 100% correct vlc_cond_wait() implementation.
271 * As this function is not available on Win9x, we can use the faster
272 * CriticalSections */
273 if( pf_SignalObjectAndWait && !b_fast_mutex )
275 /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
276 p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
277 return ( p_mutex->mutex != NULL ? 0 : 1 );
281 p_mutex->mutex = NULL;
282 InitializeCriticalSection( &p_mutex->csection );
286 #elif defined( HAVE_KERNEL_SCHEDULER_H )
287 /* check the arguments and whether it's already been initialized */
288 if( p_mutex == NULL )
293 if( p_mutex->init == 9999 )
298 p_mutex->lock = create_sem( 1, "BeMutex" );
299 if( p_mutex->lock < B_NO_ERROR )
304 p_mutex->init = 9999;
307 #elif defined( LIBVLC_USE_PTHREAD )
310 /* Create error-checking mutex to detect problems more easily. */
311 pthread_mutexattr_t attr;
314 pthread_mutexattr_init( &attr );
315 # if defined(SYS_LINUX)
316 pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
318 pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
321 i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
322 pthread_mutexattr_destroy( &attr );
326 return pthread_mutex_init( &p_mutex->mutex, NULL );
331 /*****************************************************************************
332 * vlc_mutex_init: initialize a recursive mutex (Do not use)
333 *****************************************************************************/
334 int __vlc_mutex_init_recursive( vlc_mutex_t *p_mutex )
337 /* Create mutex returns a recursive mutex */
338 p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
339 return ( p_mutex->mutex != NULL ? 0 : 1 );
340 #elif defined( LIBVLC_USE_PTHREAD )
341 pthread_mutexattr_t attr;
344 pthread_mutexattr_init( &attr );
346 /* Create error-checking mutex to detect problems more easily. */
347 # if defined(SYS_LINUX)
348 pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
350 pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
353 pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_RECURSIVE );
354 i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
355 pthread_mutexattr_destroy( &attr );
358 # error Unimplemented!
363 /*****************************************************************************
364 * vlc_mutex_destroy: destroy a mutex, inner version
365 *****************************************************************************/
366 void __vlc_mutex_destroy( const char * psz_file, int i_line, vlc_mutex_t *p_mutex )
368 #if defined( UNDER_CE )
369 DeleteCriticalSection( &p_mutex->csection );
371 #elif defined( WIN32 )
373 CloseHandle( p_mutex->mutex );
375 DeleteCriticalSection( &p_mutex->csection );
377 #elif defined( HAVE_KERNEL_SCHEDULER_H )
378 if( p_mutex->init == 9999 )
379 delete_sem( p_mutex->lock );
383 #elif defined( LIBVLC_USE_PTHREAD )
384 int val = pthread_mutex_destroy( &p_mutex->mutex );
385 VLC_THREAD_ASSERT ("destroying mutex");
390 /*****************************************************************************
391 * vlc_cond_init: initialize a condition
392 *****************************************************************************/
393 int __vlc_cond_init( vlc_cond_t *p_condvar )
395 #if defined( UNDER_CE )
396 /* Initialize counter */
397 p_condvar->i_waiting_threads = 0;
399 /* Create an auto-reset event. */
400 p_condvar->event = CreateEvent( NULL, /* no security */
401 FALSE, /* auto-reset event */
402 FALSE, /* start non-signaled */
403 NULL ); /* unnamed */
404 return !p_condvar->event;
406 #elif defined( WIN32 )
407 /* Initialize counter */
408 p_condvar->i_waiting_threads = 0;
411 p_condvar->i_win9x_cv = i_win9x_cv;
412 p_condvar->SignalObjectAndWait = pf_SignalObjectAndWait;
414 if( (p_condvar->SignalObjectAndWait && !b_fast_mutex)
415 || p_condvar->i_win9x_cv == 0 )
417 /* Create an auto-reset event. */
418 p_condvar->event = CreateEvent( NULL, /* no security */
419 FALSE, /* auto-reset event */
420 FALSE, /* start non-signaled */
421 NULL ); /* unnamed */
423 p_condvar->semaphore = NULL;
424 return !p_condvar->event;
428 p_condvar->semaphore = CreateSemaphore( NULL, /* no security */
429 0, /* initial count */
430 0x7fffffff, /* max count */
431 NULL ); /* unnamed */
433 if( p_condvar->i_win9x_cv == 1 )
434 /* Create a manual-reset event initially signaled. */
435 p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
437 /* Create a auto-reset event. */
438 p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
440 InitializeCriticalSection( &p_condvar->csection );
442 return !p_condvar->semaphore || !p_condvar->event;
445 #elif defined( HAVE_KERNEL_SCHEDULER_H )
451 if( p_condvar->init == 9999 )
456 p_condvar->thread = -1;
457 p_condvar->init = 9999;
460 #elif defined( LIBVLC_USE_PTHREAD )
461 pthread_condattr_t attr;
464 ret = pthread_condattr_init (&attr);
468 # if !defined (_POSIX_CLOCK_SELECTION)
469 /* Fairly outdated POSIX support (that was defined in 2001) */
470 # define _POSIX_CLOCK_SELECTION (-1)
472 # if (_POSIX_CLOCK_SELECTION >= 0)
473 /* NOTE: This must be the same clock as the one in mtime.c */
474 pthread_condattr_setclock (&attr, CLOCK_MONOTONIC);
477 ret = pthread_cond_init (&p_condvar->cond, &attr);
478 pthread_condattr_destroy (&attr);
484 /*****************************************************************************
485 * vlc_cond_destroy: destroy a condition, inner version
486 *****************************************************************************/
487 void __vlc_cond_destroy( const char * psz_file, int i_line, vlc_cond_t *p_condvar )
489 #if defined( UNDER_CE )
490 CloseHandle( p_condvar->event );
492 #elif defined( WIN32 )
493 if( !p_condvar->semaphore )
494 CloseHandle( p_condvar->event );
497 CloseHandle( p_condvar->event );
498 CloseHandle( p_condvar->semaphore );
501 if( p_condvar->semaphore != NULL )
502 DeleteCriticalSection( &p_condvar->csection );
504 #elif defined( HAVE_KERNEL_SCHEDULER_H )
507 #elif defined( LIBVLC_USE_PTHREAD )
508 int val = pthread_cond_destroy( &p_condvar->cond );
509 VLC_THREAD_ASSERT ("destroying condition");
514 /*****************************************************************************
515 * vlc_tls_create: create a thread-local variable
516 *****************************************************************************/
517 int __vlc_threadvar_create( vlc_threadvar_t *p_tls )
521 #if defined( HAVE_KERNEL_SCHEDULER_H )
522 # error Unimplemented!
523 #elif defined( UNDER_CE ) || defined( WIN32 )
524 #elif defined( WIN32 )
525 p_tls->handle = TlsAlloc();
526 i_ret = !( p_tls->handle == 0xFFFFFFFF );
528 #elif defined( LIBVLC_USE_PTHREAD )
529 i_ret = pthread_key_create( &p_tls->handle, NULL );
534 /*****************************************************************************
535 * vlc_thread_create: create a thread, inner version
536 *****************************************************************************
537 * Note that i_priority is only taken into account on platforms supporting
538 * userland real-time priority threads.
539 *****************************************************************************/
540 int __vlc_thread_create( vlc_object_t *p_this, const char * psz_file, int i_line,
541 const char *psz_name, void * ( *func ) ( void * ),
542 int i_priority, vlc_bool_t b_wait )
545 void *p_data = (void *)p_this;
546 vlc_object_internals_t *p_priv = p_this->p_internals;
548 vlc_mutex_lock( &p_this->object_lock );
550 #if defined( WIN32 ) || defined( UNDER_CE )
552 /* When using the MSVCRT C library you have to use the _beginthreadex
553 * function instead of CreateThread, otherwise you'll end up with
554 * memory leaks and the signal functions not working (see Microsoft
555 * Knowledge Base, article 104641) */
556 #if defined( UNDER_CE )
558 HANDLE hThread = CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE)func,
559 (LPVOID)p_data, CREATE_SUSPENDED,
563 uintptr_t hThread = _beginthreadex( NULL, 0,
564 (LPTHREAD_START_ROUTINE)func,
565 (void*)p_data, CREATE_SUSPENDED,
568 p_priv->thread_id.id = (DWORD)threadId;
569 p_priv->thread_id.hThread = (HANDLE)hThread;
570 ResumeThread((HANDLE)hThread);
573 i_ret = ( p_priv->thread_id.hThread ? 0 : 1 );
575 if( !i_ret && i_priority )
577 if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
579 msg_Warn( p_this, "couldn't set a faster priority" );
584 #elif defined( HAVE_KERNEL_SCHEDULER_H )
585 p_priv->thread_id = spawn_thread( (thread_func)func, psz_name,
586 i_priority, p_data );
587 i_ret = resume_thread( p_priv->thread_id );
589 #elif defined( LIBVLC_USE_PTHREAD )
590 i_ret = pthread_create( &p_priv->thread_id, NULL, func, p_data );
593 if( config_GetInt( p_this, "rt-priority" ) )
596 int i_error, i_policy;
597 struct sched_param param;
599 memset( ¶m, 0, sizeof(struct sched_param) );
600 if( config_GetType( p_this, "rt-offset" ) )
602 i_priority += config_GetInt( p_this, "rt-offset" );
604 if( i_priority <= 0 )
606 param.sched_priority = (-1) * i_priority;
607 i_policy = SCHED_OTHER;
611 param.sched_priority = i_priority;
614 if( (i_error = pthread_setschedparam( p_priv->thread_id,
615 i_policy, ¶m )) )
618 msg_Warn( p_this, "couldn't set thread priority (%s:%d): %m",
636 msg_Dbg( p_this, "waiting for thread completion" );
637 vlc_object_wait( p_this );
640 p_priv->b_thread = VLC_TRUE;
642 #if defined( WIN32 ) || defined( UNDER_CE )
643 msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
644 (unsigned int)p_priv->thread_id.id, psz_name,
645 i_priority, psz_file, i_line );
647 msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
648 (unsigned int)p_priv->thread_id, psz_name, i_priority,
653 vlc_mutex_unlock( &p_this->object_lock );
658 msg_Err( p_this, "%s thread could not be created at %s:%d (%m)",
659 psz_name, psz_file, i_line );
660 vlc_mutex_unlock( &p_this->object_lock );
666 /*****************************************************************************
667 * vlc_thread_set_priority: set the priority of the current thread when we
668 * couldn't set it in vlc_thread_create (for instance for the main thread)
669 *****************************************************************************/
670 int __vlc_thread_set_priority( vlc_object_t *p_this, const char * psz_file,
671 int i_line, int i_priority )
673 vlc_object_internals_t *p_priv = p_this->p_internals;
674 #if defined( WIN32 ) || defined( UNDER_CE )
675 if( !p_priv->thread_id.hThread )
676 p_priv->thread_id.hThread = GetCurrentThread();
677 if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
679 msg_Warn( p_this, "couldn't set a faster priority" );
683 #elif defined( LIBVLC_USE_PTHREAD )
685 if( config_GetInt( p_this, "rt-priority" ) > 0 )
688 int i_error, i_policy;
689 struct sched_param param;
691 memset( ¶m, 0, sizeof(struct sched_param) );
692 if( config_GetType( p_this, "rt-offset" ) )
694 i_priority += config_GetInt( p_this, "rt-offset" );
696 if( i_priority <= 0 )
698 param.sched_priority = (-1) * i_priority;
699 i_policy = SCHED_OTHER;
703 param.sched_priority = i_priority;
706 if( !p_priv->thread_id )
707 p_priv->thread_id = pthread_self();
708 if( (i_error = pthread_setschedparam( p_priv->thread_id,
709 i_policy, ¶m )) )
712 msg_Warn( p_this, "couldn't set thread priority (%s:%d): %m",
722 /*****************************************************************************
723 * vlc_thread_ready: tell the parent thread we were successfully spawned
724 *****************************************************************************/
725 void __vlc_thread_ready( vlc_object_t *p_this )
727 vlc_object_signal( p_this );
730 /*****************************************************************************
731 * vlc_thread_join: wait until a thread exits, inner version
732 *****************************************************************************/
733 void __vlc_thread_join( vlc_object_t *p_this, const char * psz_file, int i_line )
735 vlc_object_internals_t *p_priv = p_this->p_internals;
737 #if defined( UNDER_CE ) || defined( WIN32 )
739 BOOL (WINAPI *OurGetThreadTimes)( HANDLE, FILETIME*, FILETIME*,
740 FILETIME*, FILETIME* );
741 FILETIME create_ft, exit_ft, kernel_ft, user_ft;
742 int64_t real_time, kernel_time, user_time;
746 ** object will close its thread handle when destroyed, duplicate it here
747 ** to be on the safe side
749 if( ! DuplicateHandle(GetCurrentProcess(),
750 p_priv->thread_id.hThread,
755 DUPLICATE_SAME_ACCESS) )
757 msg_Err( p_this, "thread_join(%u) failed at %s:%d (%s)",
758 (unsigned int)p_priv->thread_id.id,
759 psz_file, i_line, GetLastError() );
760 p_priv->b_thread = VLC_FALSE;
764 WaitForSingleObject( hThread, INFINITE );
766 msg_Dbg( p_this, "thread %u joined (%s:%d)",
767 (unsigned int)p_priv->thread_id.id,
769 #if defined( UNDER_CE )
770 hmodule = GetModuleHandle( _T("COREDLL") );
772 hmodule = GetModuleHandle( _T("KERNEL32") );
774 OurGetThreadTimes = (BOOL (WINAPI*)( HANDLE, FILETIME*, FILETIME*,
775 FILETIME*, FILETIME* ))
776 GetProcAddress( hmodule, _T("GetThreadTimes") );
778 if( OurGetThreadTimes &&
779 OurGetThreadTimes( hThread,
780 &create_ft, &exit_ft, &kernel_ft, &user_ft ) )
783 ((((int64_t)exit_ft.dwHighDateTime)<<32)| exit_ft.dwLowDateTime) -
784 ((((int64_t)create_ft.dwHighDateTime)<<32)| create_ft.dwLowDateTime);
788 ((((int64_t)kernel_ft.dwHighDateTime)<<32)|
789 kernel_ft.dwLowDateTime) / 10;
792 ((((int64_t)user_ft.dwHighDateTime)<<32)|
793 user_ft.dwLowDateTime) / 10;
795 msg_Dbg( p_this, "thread times: "
796 "real "I64Fd"m%fs, kernel "I64Fd"m%fs, user "I64Fd"m%fs",
797 real_time/60/1000000,
798 (double)((real_time%(60*1000000))/1000000.0),
799 kernel_time/60/1000000,
800 (double)((kernel_time%(60*1000000))/1000000.0),
801 user_time/60/1000000,
802 (double)((user_time%(60*1000000))/1000000.0) );
804 CloseHandle( hThread );
806 #else /* !defined(WIN32) */
810 #if defined( HAVE_KERNEL_SCHEDULER_H )
812 i_ret = (B_OK == wait_for_thread( p_priv->thread_id, &exit_value ));
814 #elif defined( LIBVLC_USE_PTHREAD )
815 i_ret = pthread_join( p_priv->thread_id, NULL );
822 msg_Err( p_this, "thread_join(%u) failed at %s:%d (%m)",
823 (unsigned int)p_priv->thread_id, psz_file, i_line );
827 msg_Dbg( p_this, "thread %u joined (%s:%d)",
828 (unsigned int)p_priv->thread_id, psz_file, i_line );
833 p_priv->b_thread = VLC_FALSE;