* Bumped up version number to 0.5.2
[vlc.git] / src / misc / threads.c
1 /*****************************************************************************
2  * threads.c : threads implementation for the VideoLAN client
3  *****************************************************************************
4  * Copyright (C) 1999, 2000, 2001, 2002 VideoLAN
5  * $Id: threads.c,v 1.40 2003/03/10 00:04:14 massiot Exp $
6  *
7  * Authors: Jean-Marc Dressler <polux@via.ecp.fr>
8  *          Samuel Hocevar <sam@zoy.org>
9  *          Gildas Bazin <gbazin@netcourrier.com>
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License as published by
13  * the Free Software Foundation; either version 2 of the License, or
14  * (at your option) any later version.
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19  * GNU General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public License
22  * along with this program; if not, write to the Free Software
23  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
24  *****************************************************************************/
25
26 #include <vlc/vlc.h>
27
28 #include <stdlib.h>
29
30 #define VLC_THREADS_UNINITIALIZED  0
31 #define VLC_THREADS_PENDING        1
32 #define VLC_THREADS_ERROR          2
33 #define VLC_THREADS_READY          3
34
35 /*****************************************************************************
36  * Global mutex for lazy initialization of the threads system
37  *****************************************************************************/
38 static volatile int i_initializations = 0;
39
40 #if defined( PTH_INIT_IN_PTH_H )
41 #elif defined( ST_INIT_IN_ST_H )
42 #elif defined( UNDER_CE )
43 #elif defined( WIN32 )
44 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
45     static pthread_mutex_t once_mutex = PTHREAD_MUTEX_INITIALIZER;
46 #elif defined( HAVE_CTHREADS_H )
47 #elif defined( HAVE_KERNEL_SCHEDULER_H )
48 #endif
49
50 /*****************************************************************************
51  * Global variable for named mutexes
52  *****************************************************************************/
53 typedef struct vlc_namedmutex_t vlc_namedmutex_t;
54 struct vlc_namedmutex_t
55 {
56     vlc_mutex_t lock;
57
58     char *psz_name;
59     int i_usage;
60     vlc_namedmutex_t *p_next;
61 };
62
63 /*****************************************************************************
64  * vlc_threads_init: initialize threads system
65  *****************************************************************************
66  * This function requires lazy initialization of a global lock in order to
67  * keep the library really thread-safe. Some architectures don't support this
68  * and thus do not guarantee the complete reentrancy.
69  *****************************************************************************/
70 int __vlc_threads_init( vlc_object_t *p_this )
71 {
72     static volatile int i_status = VLC_THREADS_UNINITIALIZED;
73
74     libvlc_t *p_libvlc = (libvlc_t *)p_this;
75     int i_ret = VLC_SUCCESS;
76
77     /* If we have lazy mutex initialization, use it. Otherwise, we just
78      * hope nothing wrong happens. */
79 #if defined( PTH_INIT_IN_PTH_H )
80 #elif defined( ST_INIT_IN_ST_H )
81 #elif defined( UNDER_CE )
82 #elif defined( WIN32 )
83     HINSTANCE hInstLib;
84 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
85     pthread_mutex_lock( &once_mutex );
86 #elif defined( HAVE_CTHREADS_H )
87 #elif defined( HAVE_KERNEL_SCHEDULER_H )
88 #endif
89
90     if( i_status == VLC_THREADS_UNINITIALIZED )
91     {
92         i_status = VLC_THREADS_PENDING;
93
94         /* We should be safe now. Do all the initialization stuff we want. */
95         p_libvlc->b_ready = VLC_FALSE;
96
97 #if defined( PTH_INIT_IN_PTH_H )
98         i_ret = ( pth_init() == FALSE );
99
100 #elif defined( ST_INIT_IN_ST_H )
101         i_ret = st_init();
102
103 #elif defined( UNDER_CE )
104         /* Nothing to initialize */
105
106 #elif defined( WIN32 )
107         /* Dynamically get the address of SignalObjectAndWait */
108         if( GetVersion() < 0x80000000 )
109         {
110             /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
111             hInstLib = LoadLibrary( "kernel32" );
112             if( hInstLib )
113             {
114                 p_libvlc->SignalObjectAndWait =
115                     (SIGNALOBJECTANDWAIT)GetProcAddress( hInstLib,
116                                                      "SignalObjectAndWait" );
117             }
118         }
119         else
120         {
121             p_libvlc->SignalObjectAndWait = NULL;
122         }
123
124         p_libvlc->b_fast_mutex = 0;
125         p_libvlc->i_win9x_cv = 0;
126
127 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
128 #elif defined( HAVE_CTHREADS_H )
129 #elif defined( HAVE_KERNEL_SCHEDULER_H )
130 #endif
131
132         vlc_object_create( p_libvlc, VLC_OBJECT_ROOT );
133
134         if( i_ret )
135         {
136             i_status = VLC_THREADS_ERROR;
137         }
138         else
139         {
140             i_initializations++;
141             i_status = VLC_THREADS_READY;
142         }
143     }
144     else
145     {
146         /* Just increment the initialization count */
147         i_initializations++;
148     }
149
150     /* If we have lazy mutex initialization support, unlock the mutex;
151      * otherwize, do a naive wait loop. */
152 #if defined( PTH_INIT_IN_PTH_H )
153     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
154 #elif defined( ST_INIT_IN_ST_H )
155     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
156 #elif defined( UNDER_CE )
157     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
158 #elif defined( WIN32 )
159     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
160 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
161     pthread_mutex_unlock( &once_mutex );
162 #elif defined( HAVE_CTHREADS_H )
163     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
164 #elif defined( HAVE_KERNEL_SCHEDULER_H )
165     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
166 #endif
167
168     if( i_status != VLC_THREADS_READY )
169     {
170         return VLC_ETHREAD;
171     }
172
173     return i_ret;
174 }
175
176 /*****************************************************************************
177  * vlc_threads_end: stop threads system
178  *****************************************************************************
179  * FIXME: This function is far from being threadsafe. We should undo exactly
180  * what we did above in vlc_threads_init.
181  *****************************************************************************/
182 int __vlc_threads_end( vlc_object_t *p_this )
183 {
184 #if defined( PTH_INIT_IN_PTH_H )
185     i_initializations--;
186     if( i_initializations == 0 )
187     {
188         return ( pth_kill() == FALSE );
189     }
190
191 #elif defined( ST_INIT_IN_ST_H )
192     i_initializations--;
193
194 #elif defined( UNDER_CE )
195     i_initializations--;
196
197 #elif defined( WIN32 )
198     i_initializations--;
199
200 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
201     pthread_mutex_lock( &once_mutex );
202     i_initializations--;
203     pthread_mutex_unlock( &once_mutex );
204
205 #elif defined( HAVE_CTHREADS_H )
206     i_initializations--;
207
208 #elif defined( HAVE_KERNEL_SCHEDULER_H )
209     i_initializations--;
210
211 #endif
212     return VLC_SUCCESS;
213 }
214
215 /*****************************************************************************
216  * Prototype for GPROF wrapper
217  *****************************************************************************/
218 #ifdef GPROF
219 typedef void *(*vlc_thread_func_t)(void *p_data);
220
221 /* Wrapper function for profiling */
222 static void *      vlc_thread_wrapper ( void *p_wrapper );
223
224 #   if defined( WIN32 ) && !defined( UNDER_CE )
225
226 #       define ITIMER_REAL 1
227 #       define ITIMER_PROF 2
228
229 struct itimerval
230 {
231     struct timeval it_value;
232     struct timeval it_interval;
233 };
234
235 int setitimer(int kind, const struct itimerval* itnew, struct itimerval* itold);
236 #   endif /* WIN32 && !UNDER_CE */
237
238 typedef struct wrapper_t
239 {
240     /* Data lock access */
241     vlc_mutex_t lock;
242     vlc_cond_t  wait;
243
244     /* Data used to spawn the real thread */
245     vlc_thread_func_t func;
246     void *p_data;
247
248     /* Profiling timer passed to the thread */
249     struct itimerval itimer;
250
251 } wrapper_t;
252
253 #endif /* GPROF */
254
255 /*****************************************************************************
256  * vlc_mutex_init: initialize a mutex
257  *****************************************************************************/
258 int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
259 {
260     p_mutex->p_this = p_this;
261
262 #if defined( PTH_INIT_IN_PTH_H )
263     return ( pth_mutex_init( &p_mutex->mutex ) == FALSE );
264
265 #elif defined( ST_INIT_IN_ST_H )
266     p_mutex->mutex = st_mutex_new();
267     return ( p_mutex->mutex == NULL ) ? errno : 0;
268
269 #elif defined( UNDER_CE )
270     InitializeCriticalSection( &p_mutex->csection );
271     return 0;
272
273 #elif defined( WIN32 )
274     /* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
275      * function and have a 100% correct vlc_cond_wait() implementation.
276      * As this function is not available on Win9x, we can use the faster
277      * CriticalSections */
278     if( p_this->p_libvlc->SignalObjectAndWait &&
279         !p_this->p_libvlc->b_fast_mutex )
280     {
281         /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
282         p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
283         return ( p_mutex->mutex != NULL ? 0 : 1 );
284     }
285     else
286     {
287         p_mutex->mutex = NULL;
288         InitializeCriticalSection( &p_mutex->csection );
289         return 0;
290     }
291
292 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
293 #   if defined(DEBUG) && defined(SYS_LINUX)
294     {
295         /* Create error-checking mutex to detect problems more easily. */
296         pthread_mutexattr_t attr;
297         int                 i_result;
298
299         pthread_mutexattr_init( &attr );
300         pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
301         i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
302         pthread_mutexattr_destroy( &attr );
303         return( i_result );
304     }
305 #   endif
306     return pthread_mutex_init( &p_mutex->mutex, NULL );
307
308 #elif defined( HAVE_CTHREADS_H )
309     mutex_init( p_mutex );
310     return 0;
311
312 #elif defined( HAVE_KERNEL_SCHEDULER_H )
313     /* check the arguments and whether it's already been initialized */
314     if( p_mutex == NULL )
315     {
316         return B_BAD_VALUE;
317     }
318
319     if( p_mutex->init == 9999 )
320     {
321         return EALREADY;
322     }
323
324     p_mutex->lock = create_sem( 1, "BeMutex" );
325     if( p_mutex->lock < B_NO_ERROR )
326     {
327         return( -1 );
328     }
329
330     p_mutex->init = 9999;
331     return B_OK;
332
333 #endif
334 }
335
336 /*****************************************************************************
337  * vlc_mutex_destroy: destroy a mutex, inner version
338  *****************************************************************************/
339 int __vlc_mutex_destroy( char * psz_file, int i_line, vlc_mutex_t *p_mutex )
340 {
341     int i_result;
342     /* In case of error : */
343     int i_thread = -1;
344     const char * psz_error = "";
345
346 #if defined( PTH_INIT_IN_PTH_H )
347     return 0;
348
349 #elif defined( ST_INIT_IN_ST_H )
350     i_result = st_mutex_destroy( p_mutex->mutex );
351
352 #elif defined( UNDER_CE )
353     DeleteCriticalSection( &p_mutex->csection );
354     return 0;
355
356 #elif defined( WIN32 )
357     if( p_mutex->mutex )
358     {
359         CloseHandle( p_mutex->mutex );
360     }
361     else
362     {
363         DeleteCriticalSection( &p_mutex->csection );
364     }
365     return 0;
366
367 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
368     i_result = pthread_mutex_destroy( &p_mutex->mutex );
369     if ( i_result )
370     {
371         i_thread = (int)pthread_self();
372         psz_error = strerror(i_result);
373     }
374
375 #elif defined( HAVE_CTHREADS_H )
376     return 0;
377
378 #elif defined( HAVE_KERNEL_SCHEDULER_H )
379     if( p_mutex->init == 9999 )
380     {
381         delete_sem( p_mutex->lock );
382     }
383
384     p_mutex->init = 0;
385     return B_OK;
386 #endif
387
388     if( i_result )
389     {
390         msg_Err( p_mutex->p_this,
391                  "thread %d: mutex_destroy failed at %s:%d (%d:%s)",
392                  i_thread, psz_file, i_line, i_result, psz_error );
393     }
394     return i_result;
395 }
396
397 /*****************************************************************************
398  * vlc_cond_init: initialize a condition
399  *****************************************************************************/
400 int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar )
401 {
402     p_condvar->p_this = p_this;
403
404 #if defined( PTH_INIT_IN_PTH_H )
405     return ( pth_cond_init( &p_condvar->cond ) == FALSE );
406
407 #elif defined( ST_INIT_IN_ST_H )
408     p_condvar->cond = st_cond_new();
409     return ( p_condvar->cond == NULL ) ? errno : 0;
410
411 #elif defined( UNDER_CE )
412     /* Initialize counter */
413     p_condvar->i_waiting_threads = 0;
414
415     /* Create an auto-reset event. */
416     p_condvar->event = CreateEvent( NULL,   /* no security */
417                                     FALSE,  /* auto-reset event */
418                                     FALSE,  /* start non-signaled */
419                                     NULL ); /* unnamed */
420     return !p_condvar->event;
421
422 #elif defined( WIN32 )
423     /* Initialize counter */
424     p_condvar->i_waiting_threads = 0;
425
426     /* Misc init */
427     p_condvar->i_win9x_cv = p_this->p_libvlc->i_win9x_cv;
428     p_condvar->SignalObjectAndWait = p_this->p_libvlc->SignalObjectAndWait;
429
430     if( (p_condvar->SignalObjectAndWait && !p_this->p_libvlc->b_fast_mutex)
431         || p_condvar->i_win9x_cv == 0 )
432     {
433         /* Create an auto-reset event. */
434         p_condvar->event = CreateEvent( NULL,   /* no security */
435                                         FALSE,  /* auto-reset event */
436                                         FALSE,  /* start non-signaled */
437                                         NULL ); /* unnamed */
438
439         p_condvar->semaphore = NULL;
440         return !p_condvar->event;
441     }
442     else
443     {
444         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
445                                                 0,          /* initial count */
446                                                 0x7fffffff, /* max count */
447                                                 NULL );     /* unnamed */
448
449         if( p_condvar->i_win9x_cv == 1 )
450             /* Create a manual-reset event initially signaled. */
451             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
452         else
453             /* Create a auto-reset event. */
454             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
455
456         InitializeCriticalSection( &p_condvar->csection );
457
458         return !p_condvar->semaphore || !p_condvar->event;
459     }
460
461 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
462     return pthread_cond_init( &p_condvar->cond, NULL );
463
464 #elif defined( HAVE_CTHREADS_H )
465     /* condition_init() */
466     spin_lock_init( &p_condvar->lock );
467     cthread_queue_init( &p_condvar->queue );
468     p_condvar->name = 0;
469     p_condvar->implications = 0;
470
471     return 0;
472
473 #elif defined( HAVE_KERNEL_SCHEDULER_H )
474     if( !p_condvar )
475     {
476         return B_BAD_VALUE;
477     }
478
479     if( p_condvar->init == 9999 )
480     {
481         return EALREADY;
482     }
483
484     p_condvar->thread = -1;
485     p_condvar->init = 9999;
486     return 0;
487 #endif
488 }
489
490 /*****************************************************************************
491  * vlc_cond_destroy: destroy a condition, inner version
492  *****************************************************************************/
493 int __vlc_cond_destroy( char * psz_file, int i_line, vlc_cond_t *p_condvar )
494 {
495     int i_result;
496     /* In case of error : */
497     int i_thread = -1;
498     const char * psz_error = "";
499
500 #if defined( PTH_INIT_IN_PTH_H )
501     return 0;
502
503 #elif defined( ST_INIT_IN_ST_H )
504     i_result = st_cond_destroy( p_condvar->cond );
505
506 #elif defined( UNDER_CE )
507     i_result = !CloseHandle( p_condvar->event );
508
509 #elif defined( WIN32 )
510     if( !p_condvar->semaphore )
511         i_result = !CloseHandle( p_condvar->event );
512     else
513         i_result = !CloseHandle( p_condvar->event )
514           || !CloseHandle( p_condvar->semaphore );
515
516 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
517     i_result = pthread_cond_destroy( &p_condvar->cond );
518     if ( i_result )
519     {
520         i_thread = (int)pthread_self();
521         psz_error = strerror(i_result);
522     }
523
524 #elif defined( HAVE_CTHREADS_H )
525     return 0;
526
527 #elif defined( HAVE_KERNEL_SCHEDULER_H )
528     p_condvar->init = 0;
529     return 0;
530 #endif
531
532     if( i_result )
533     {
534         msg_Err( p_condvar->p_this,
535                  "thread %d: cond_destroy failed at %s:%d (%d:%s)",
536                  i_thread, psz_file, i_line, i_result, psz_error );
537     }
538     return i_result;
539 }
540
541 /*****************************************************************************
542  * vlc_thread_create: create a thread, inner version
543  *****************************************************************************
544  * Note that i_priority is only taken into account on platforms supporting
545  * userland real-time priority threads.
546  *****************************************************************************/
547 int __vlc_thread_create( vlc_object_t *p_this, char * psz_file, int i_line,
548                          char *psz_name, void * ( *func ) ( void * ),
549                          int i_priority, vlc_bool_t b_wait )
550 {
551     int i_ret;
552     void *p_data;
553
554     vlc_mutex_lock( &p_this->object_lock );
555
556 #ifdef GPROF
557     wrapper_t wrapper;
558
559     /* Initialize the wrapper structure */
560     wrapper.func = func;
561     wrapper.p_data = (void *)p_this;
562     getitimer( ITIMER_PROF, &wrapper.itimer );
563     vlc_mutex_init( p_this, &wrapper.lock );
564     vlc_cond_init( p_this, &wrapper.wait );
565     vlc_mutex_lock( &wrapper.lock );
566
567     /* Alter user-passed data so that we call the wrapper instead
568      * of the real function */
569     p_data = &wrapper;
570     func = vlc_thread_wrapper;
571 #else
572     p_data = (void *)p_this;
573 #endif
574
575 #if defined( PTH_INIT_IN_PTH_H )
576     p_this->thread_id = pth_spawn( PTH_ATTR_DEFAULT, func, p_data );
577     i_ret = p_this->thread_id == NULL;
578
579 #elif defined( ST_INIT_IN_ST_H )
580     p_this->thread_id = st_thread_create( func, p_data, 1, 0 );
581     i_ret = 0;
582
583 #elif defined( WIN32 ) || defined( UNDER_CE )
584     {
585         unsigned threadID;
586         /* When using the MSVCRT C library you have to use the _beginthreadex
587          * function instead of CreateThread, otherwise you'll end up with
588          * memory leaks and the signal functions not working (see Microsoft
589          * Knowledge Base, article 104641) */
590         p_this->thread_id =
591 #if defined( UNDER_CE )
592                 (HANDLE)CreateThread( NULL, 0, (PTHREAD_START) func,
593                                       p_data, 0, &threadID );
594 #else
595                 (HANDLE)_beginthreadex( NULL, 0, (PTHREAD_START) func,
596                                         p_data, 0, &threadID );
597 #endif
598     }
599
600     if ( p_this->thread_id && i_priority )
601     {
602         if ( !SetThreadPriority(p_this->thread_id, i_priority) )
603         {
604             msg_Warn( p_this, "couldn't set a faster priority" );
605             i_priority = 0;
606         }
607     }
608
609     i_ret = ( p_this->thread_id ? 0 : 1 );
610
611 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
612     i_ret = pthread_create( &p_this->thread_id, NULL, func, p_data );
613
614 #ifdef SYS_DARWIN
615     if ( i_priority )
616     {
617         int i_error, i_policy;
618         struct sched_param param;
619         memset( &param, 0, sizeof(struct sched_param) );
620         if ( i_priority < 0 )
621         {
622             param.sched_priority = (-1) * i_priority;
623             i_policy = SCHED_OTHER;
624         }
625         else
626         {
627             param.sched_priority = i_priority;
628             i_policy = SCHED_RR;
629         }
630         if ( (i_error = pthread_setschedparam( p_this->thread_id,
631                                                i_policy, &param )) )
632         {
633             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s",
634                       psz_file, i_line, strerror(i_error) );
635             i_priority = 0;
636         }
637     }
638 #endif
639
640 #elif defined( HAVE_CTHREADS_H )
641     p_this->thread_id = cthread_fork( (cthread_fn_t)func, (any_t)p_data );
642     i_ret = 0;
643
644 #elif defined( HAVE_KERNEL_SCHEDULER_H )
645     p_this->thread_id = spawn_thread( (thread_func)func, psz_name,
646                                       i_priority, p_data );
647     i_ret = resume_thread( p_this->thread_id );
648
649 #endif
650
651 #ifdef GPROF
652     if( i_ret == 0 )
653     {
654         vlc_cond_wait( &wrapper.wait, &wrapper.lock );
655     }
656
657     vlc_mutex_unlock( &wrapper.lock );
658     vlc_mutex_destroy( &wrapper.lock );
659     vlc_cond_destroy( &wrapper.wait );
660 #endif
661
662     if( i_ret == 0 )
663     {
664         if( b_wait )
665         {
666             msg_Dbg( p_this, "waiting for thread completion" );
667             vlc_cond_wait( &p_this->object_wait, &p_this->object_lock );
668         }
669
670         p_this->b_thread = 1;
671
672         msg_Dbg( p_this, "thread %d (%s) created at priority %d (%s:%d)",
673                  (int)p_this->thread_id, psz_name, i_priority,
674                  psz_file, i_line );
675
676         vlc_mutex_unlock( &p_this->object_lock );
677     }
678     else
679     {
680 #ifdef HAVE_STRERROR
681         msg_Err( p_this, "%s thread could not be created at %s:%d (%s)",
682                          psz_name, psz_file, i_line, strerror(i_ret) );
683 #else
684         msg_Err( p_this, "%s thread could not be created at %s:%d",
685                          psz_name, psz_file, i_line );
686 #endif
687         vlc_mutex_unlock( &p_this->object_lock );
688     }
689
690     return i_ret;
691 }
692
693 /*****************************************************************************
694  * vlc_thread_set_priority: set the priority of the current thread when we
695  * couldn't set it in vlc_thread_create (for instance for the main thread)
696  *****************************************************************************/
697 int __vlc_thread_set_priority( vlc_object_t *p_this, char * psz_file,
698                                int i_line, int i_priority )
699 {
700 #if defined( PTH_INIT_IN_PTH_H ) || defined( ST_INIT_IN_ST_H )
701 #elif defined( WIN32 ) || defined( UNDER_CE )
702     if ( !SetThreadPriority(GetCurrentThread(), i_priority) )
703     {
704         msg_Warn( p_this, "couldn't set a faster priority" );
705         return 1;
706     }
707
708 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
709
710 #ifdef SYS_DARWIN
711     if ( i_priority )
712     {
713         int i_error, i_policy;
714         struct sched_param param;
715         memset( &param, 0, sizeof(struct sched_param) );
716         if ( i_priority < 0 )
717         {
718             param.sched_priority = (-1) * i_priority;
719             i_policy = SCHED_OTHER;
720         }
721         else
722         {
723             param.sched_priority = i_priority;
724             i_policy = SCHED_RR;
725         }
726         if ( (i_error = pthread_setschedparam( pthread_self(),
727                                                i_policy, &param )) )
728         {
729             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s",     
730                       psz_file, i_line, strerror(i_error) );
731             i_priority = 0;
732         }
733     }
734 #endif
735
736 #endif
737
738     return 0;
739 }
740
741 /*****************************************************************************
742  * vlc_thread_ready: tell the parent thread we were successfully spawned
743  *****************************************************************************/
744 void __vlc_thread_ready( vlc_object_t *p_this )
745 {
746     vlc_mutex_lock( &p_this->object_lock );
747     vlc_cond_signal( &p_this->object_wait );
748     vlc_mutex_unlock( &p_this->object_lock );
749 }
750
751 /*****************************************************************************
752  * vlc_thread_join: wait until a thread exits, inner version
753  *****************************************************************************/
754 void __vlc_thread_join( vlc_object_t *p_this, char * psz_file, int i_line )
755 {
756     int i_ret = 0;
757
758 #if defined( PTH_INIT_IN_PTH_H )
759     i_ret = ( pth_join( p_this->thread_id, NULL ) == FALSE );
760
761 #elif defined( ST_INIT_IN_ST_H )
762     i_ret = st_thread_join( p_this->thread_id, NULL );
763
764 #elif defined( UNDER_CE )
765     WaitForSingleObject( p_this->thread_id, INFINITE );
766
767 #elif defined( WIN32 )
768     WaitForSingleObject( p_this->thread_id, INFINITE );
769
770 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
771     i_ret = pthread_join( p_this->thread_id, NULL );
772
773 #elif defined( HAVE_CTHREADS_H )
774     cthread_join( p_this->thread_id );
775     i_ret = 1;
776
777 #elif defined( HAVE_KERNEL_SCHEDULER_H )
778     int32 exit_value;
779     wait_for_thread( p_this->thread_id, &exit_value );
780
781 #endif
782
783     if( i_ret )
784     {
785 #ifdef HAVE_STRERROR
786         msg_Err( p_this, "thread_join(%d) failed at %s:%d (%s)",
787                          (int)p_this->thread_id, psz_file, i_line,
788                          strerror(i_ret) );
789 #else
790         msg_Err( p_this, "thread_join(%d) failed at %s:%d",
791                          (int)p_this->thread_id, psz_file, i_line );
792 #endif
793     }
794     else
795     {
796         msg_Dbg( p_this, "thread %d joined (%s:%d)",
797                          (int)p_this->thread_id, psz_file, i_line );
798     }
799
800     p_this->b_thread = 0;
801 }
802
803 /*****************************************************************************
804  * vlc_thread_wrapper: wrapper around thread functions used when profiling.
805  *****************************************************************************/
806 #ifdef GPROF
807 static void *vlc_thread_wrapper( void *p_wrapper )
808 {
809     /* Put user data in thread-local variables */
810     void *            p_data = ((wrapper_t*)p_wrapper)->p_data;
811     vlc_thread_func_t func   = ((wrapper_t*)p_wrapper)->func;
812
813     /* Set the profile timer value */
814     setitimer( ITIMER_PROF, &((wrapper_t*)p_wrapper)->itimer, NULL );
815
816     /* Tell the calling thread that we don't need its data anymore */
817     vlc_mutex_lock( &((wrapper_t*)p_wrapper)->lock );
818     vlc_cond_signal( &((wrapper_t*)p_wrapper)->wait );
819     vlc_mutex_unlock( &((wrapper_t*)p_wrapper)->lock );
820
821     /* Call the real function */
822     return func( p_data );
823 }
824 #endif