git.sesse.net Git - vlc/blob - 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 1.25 2002/11/10 23:41:53 sam 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( WIN32 )
  43 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
  44     static pthread_mutex_t once_mutex = PTHREAD_MUTEX_INITIALIZER;
  45 #elif defined( HAVE_CTHREADS_H )
  46 #elif defined( HAVE_KERNEL_SCHEDULER_H )
  47 #endif
  48
  49 /*****************************************************************************
  50  * Global variable for named mutexes
  51  *****************************************************************************/
  52 typedef struct vlc_namedmutex_t vlc_namedmutex_t;
  53 struct vlc_namedmutex_t
  54 {
  55     vlc_mutex_t lock;
  56
  57     char *psz_name;
  58     int i_usage;
  59     vlc_namedmutex_t *p_next;
  60 };
  61
  62 /*****************************************************************************
  63  * vlc_threads_init: initialize threads system
  64  *****************************************************************************
  65  * This function requires lazy initialization of a global lock in order to
  66  * keep the library really thread-safe. Some architectures don't support this
  67  * and thus do not guarantee the complete reentrancy.
  68  *****************************************************************************/
  69 int __vlc_threads_init( vlc_object_t *p_this )
  70 {
  71     static volatile int i_status = VLC_THREADS_UNINITIALIZED;
  72
  73     libvlc_t *p_libvlc = (libvlc_t *)p_this;
  74     int i_ret = VLC_SUCCESS;
  75
  76     /* If we have lazy mutex initialization, use it. Otherwise, we just
  77      * hope nothing wrong happens. */
  78 #if defined( PTH_INIT_IN_PTH_H )
  79 #elif defined( ST_INIT_IN_ST_H )
  80 #elif defined( UNDER_CE )
  81 #elif defined( WIN32 )
  82     HINSTANCE hInstLib;
  83 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
  84     pthread_mutex_lock( &once_mutex );
  85 #elif defined( HAVE_CTHREADS_H )
  86 #elif defined( HAVE_KERNEL_SCHEDULER_H )
  87 #endif
  88
  89     if( i_status == VLC_THREADS_UNINITIALIZED )
  90     {
  91         i_status = VLC_THREADS_PENDING;
  92
  93         /* We should be safe now. Do all the initialization stuff we want. */
  94         vlc_object_create( p_libvlc, VLC_OBJECT_ROOT );
  95         p_libvlc->b_ready = VLC_FALSE;
  96
  97 #if defined( PTH_INIT_IN_PTH_H )
  98         i_ret = pth_init();
  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         if( i_ret )
 133         {
 134             i_status = VLC_THREADS_ERROR;
 135         }
 136         else
 137         {
 138             i_initializations++;
 139             i_status = VLC_THREADS_READY;
 140         }
 141     }
 142     else
 143     {
 144         /* Just increment the initialization count */
 145         i_initializations++;
 146     }
 147
 148     /* If we have lazy mutex initialization support, unlock the mutex;
 149      * otherwize, do a naive wait loop. */
 150 #if defined( PTH_INIT_IN_PTH_H )
 151     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 152 #elif defined( ST_INIT_IN_ST_H )
 153     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 154 #elif defined( WIN32 )
 155     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 156 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 157     pthread_mutex_unlock( &once_mutex );
 158 #elif defined( HAVE_CTHREADS_H )
 159     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 160 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 161     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 162 #endif
 163
 164     if( i_status != VLC_THREADS_READY )
 165     {
 166         return VLC_ETHREAD;
 167     }
 168
 169     return i_ret;
 170 }
 171
 172 /*****************************************************************************
 173  * vlc_threads_end: stop threads system
 174  *****************************************************************************
 175  * FIXME: This function is far from being threadsafe. We should undo exactly
 176  * what we did above in vlc_threads_init.
 177  *****************************************************************************/
 178 int __vlc_threads_end( vlc_object_t *p_this )
 179 {
 180 #if defined( PTH_INIT_IN_PTH_H )
 181     i_initializations--;
 182     if( i_initializations == 0 )
 183     {
 184         return pth_kill();
 185     }
 186
 187 #elif defined( ST_INIT_IN_ST_H )
 188     i_initializations--;
 189
 190 #elif defined( WIN32 )
 191     i_initializations--;
 192
 193 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 194     pthread_mutex_lock( &once_mutex );
 195     i_initializations--;
 196     pthread_mutex_unlock( &once_mutex );
 197
 198 #elif defined( HAVE_CTHREADS_H )
 199     i_initializations--;
 200
 201 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 202     i_initializations--;
 203
 204 #endif
 205     return VLC_SUCCESS;
 206 }
 207
 208 /*****************************************************************************
 209  * Prototype for GPROF wrapper
 210  *****************************************************************************/
 211 #ifdef GPROF
 212 /* Wrapper function for profiling */
 213 static void *      vlc_thread_wrapper ( void *p_wrapper );
 214
 215 #   ifdef WIN32
 216
 217 #       define ITIMER_REAL 1
 218 #       define ITIMER_PROF 2
 219
 220 struct itimerval
 221 {
 222     struct timeval it_value;
 223     struct timeval it_interval;
 224 };
 225
 226 int setitimer(int kind, const struct itimerval* itnew, struct itimerval* itold);
 227 #   endif /* WIN32 */
 228
 229 typedef struct wrapper_t
 230 {
 231     /* Data lock access */
 232     vlc_mutex_t lock;
 233     vlc_cond_t  wait;
 234
 235     /* Data used to spawn the real thread */
 236     vlc_thread_func_t func;
 237     void *p_data;
 238
 239     /* Profiling timer passed to the thread */
 240     struct itimerval itimer;
 241
 242 } wrapper_t;
 243
 244 #endif /* GPROF */
 245
 246 /*****************************************************************************
 247  * vlc_mutex_init: initialize a mutex
 248  *****************************************************************************/
 249 int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 250 {
 251     p_mutex->p_this = p_this;
 252
 253 #if defined( PTH_INIT_IN_PTH_H )
 254     return pth_mutex_init( &p_mutex->mutex );
 255
 256 #elif defined( ST_INIT_IN_ST_H )
 257     p_mutex->mutex = st_mutex_new();
 258     return ( p_mutex->mutex == NULL ) ? errno : 0;
 259
 260 #elif defined( WIN32 )
 261     /* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
 262      * function and have a 100% correct vlc_cond_wait() implementation.
 263      * As this function is not available on Win9x, we can use the faster
 264      * CriticalSections */
 265 #   if !defined( UNDER_CE )
 266     if( p_this->p_libvlc->SignalObjectAndWait &&
 267         !p_this->p_libvlc->b_fast_mutex )
 268     {
 269         /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 270         p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
 271         return ( p_mutex->mutex != NULL ? 0 : 1 );
 272     }
 273     else
 274 #   endif
 275     {
 276         p_mutex->mutex = NULL;
 277         InitializeCriticalSection( &p_mutex->csection );
 278         return 0;
 279     }
 280
 281 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 282 #   if defined(DEBUG) && defined(SYS_LINUX)
 283     {
 284         /* Create error-checking mutex to detect problems more easily. */
 285         pthread_mutexattr_t attr;
 286         int                 i_result;
 287
 288         pthread_mutexattr_init( &attr );
 289         pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 290         i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 291         pthread_mutexattr_destroy( &attr );
 292         return( i_result );
 293     }
 294 #   endif
 295     return pthread_mutex_init( &p_mutex->mutex, NULL );
 296
 297 #elif defined( HAVE_CTHREADS_H )
 298     mutex_init( p_mutex );
 299     return 0;
 300
 301 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 302     /* check the arguments and whether it's already been initialized */
 303     if( p_mutex == NULL )
 304     {
 305         return B_BAD_VALUE;
 306     }
 307
 308     if( p_mutex->init == 9999 )
 309     {
 310         return EALREADY;
 311     }
 312
 313     p_mutex->lock = create_sem( 1, "BeMutex" );
 314     if( p_mutex->lock < B_NO_ERROR )
 315     {
 316         return( -1 );
 317     }
 318
 319     p_mutex->init = 9999;
 320     return B_OK;
 321
 322 #endif
 323 }
 324
 325 /*****************************************************************************
 326  * vlc_mutex_destroy: destroy a mutex, inner version
 327  *****************************************************************************/
 328 int __vlc_mutex_destroy( char * psz_file, int i_line, vlc_mutex_t *p_mutex )
 329 {
 330     int i_result;
 331     /* In case of error : */
 332     int i_thread = -1;
 333     const char * psz_error = "";
 334
 335 #if defined( PTH_INIT_IN_PTH_H )
 336     return 0;
 337
 338 #elif defined( ST_INIT_IN_ST_H )
 339     i_result = st_mutex_destroy( p_mutex->mutex );
 340
 341 #elif defined( WIN32 )
 342     if( p_mutex->mutex )
 343     {
 344         CloseHandle( p_mutex->mutex );
 345     }
 346     else
 347     {
 348         DeleteCriticalSection( &p_mutex->csection );
 349     }
 350     return 0;
 351
 352 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 353     i_result = pthread_mutex_destroy( &p_mutex->mutex );
 354     if ( i_result )
 355     {
 356         i_thread = (int)pthread_self();
 357         psz_error = strerror(i_result);
 358     }
 359
 360 #elif defined( HAVE_CTHREADS_H )
 361     return 0;
 362
 363 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 364     if( p_mutex->init == 9999 )
 365     {
 366         delete_sem( p_mutex->lock );
 367     }
 368
 369     p_mutex->init = 0;
 370     return B_OK;
 371 #endif
 372
 373     if( i_result )
 374     {
 375         msg_Err( p_mutex->p_this,
 376                  "thread %d: mutex_destroy failed at %s:%d (%d:%s)",
 377                  i_thread, psz_file, i_line, i_result, psz_error );
 378     }
 379     return i_result;
 380 }
 381
 382 /*****************************************************************************
 383  * vlc_cond_init: initialize a condition
 384  *****************************************************************************/
 385 int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar )
 386 {
 387     p_condvar->p_this = p_this;
 388
 389 #if defined( PTH_INIT_IN_PTH_H )
 390     return pth_cond_init( &p_condvar->cond );
 391
 392 #elif defined( ST_INIT_IN_ST_H )
 393     p_condvar->cond = st_cond_new();
 394     return ( p_condvar->cond == NULL ) ? errno : 0;
 395
 396 #elif defined( WIN32 )
 397     /* Initialize counter */
 398     p_condvar->i_waiting_threads = 0;
 399
 400 #   if !defined( UNDER_CE )
 401     /* Misc init */
 402     p_condvar->i_win9x_cv = p_this->p_libvlc->i_win9x_cv;
 403     p_condvar->SignalObjectAndWait = p_this->p_libvlc->SignalObjectAndWait;
 404
 405     if( (p_condvar->SignalObjectAndWait && !p_this->p_libvlc->b_fast_mutex)
 406         || p_condvar->i_win9x_cv == 0 )
 407     {
 408 #   endif
 409         /* Create an auto-reset event. */
 410         p_condvar->event = CreateEvent( NULL,   /* no security */
 411                                         FALSE,  /* auto-reset event */
 412                                         FALSE,  /* start non-signaled */
 413                                         NULL ); /* unnamed */
 414
 415         p_condvar->semaphore = NULL;
 416         return !p_condvar->event;
 417 #   if !defined( UNDER_CE )
 418     }
 419     else
 420     {
 421         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
 422                                                 0,          /* initial count */
 423                                                 0x7fffffff, /* max count */
 424                                                 NULL );     /* unnamed */
 425
 426         if( p_condvar->i_win9x_cv == 1 )
 427             /* Create a manual-reset event initially signaled. */
 428             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
 429         else
 430             /* Create a auto-reset event. */
 431             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
 432
 433         InitializeCriticalSection( &p_condvar->csection );
 434
 435         return !p_condvar->semaphore || !p_condvar->event;
 436     }
 437 #   endif
 438
 439 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 440     return pthread_cond_init( &p_condvar->cond, NULL );
 441
 442 #elif defined( HAVE_CTHREADS_H )
 443     /* condition_init() */
 444     spin_lock_init( &p_condvar->lock );
 445     cthread_queue_init( &p_condvar->queue );
 446     p_condvar->name = 0;
 447     p_condvar->implications = 0;
 448
 449     return 0;
 450
 451 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 452     if( !p_condvar )
 453     {
 454         return B_BAD_VALUE;
 455     }
 456
 457     if( p_condvar->init == 9999 )
 458     {
 459         return EALREADY;
 460     }
 461
 462     p_condvar->thread = -1;
 463     p_condvar->init = 9999;
 464     return 0;
 465 #endif
 466 }
 467
 468 /*****************************************************************************
 469  * vlc_cond_destroy: destroy a condition, inner version
 470  *****************************************************************************/
 471 int __vlc_cond_destroy( char * psz_file, int i_line, vlc_cond_t *p_condvar )
 472 {
 473     int i_result;
 474     /* In case of error : */
 475     int i_thread = -1;
 476     const char * psz_error = "";
 477
 478 #if defined( PTH_INIT_IN_PTH_H )
 479     return 0;
 480
 481 #elif defined( ST_INIT_IN_ST_H )
 482     i_result = st_cond_destroy( p_condvar->cond );
 483
 484 #elif defined( WIN32 )
 485     if( !p_condvar->semaphore )
 486         i_result = !CloseHandle( p_condvar->event );
 487     else
 488         i_result = !CloseHandle( p_condvar->event )
 489           || !CloseHandle( p_condvar->semaphore );
 490
 491 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 492     i_result = pthread_cond_destroy( &p_condvar->cond );
 493     if ( i_result )
 494     {
 495         i_thread = (int)pthread_self();
 496         psz_error = strerror(i_result);
 497     }
 498
 499 #elif defined( HAVE_CTHREADS_H )
 500     return 0;
 501
 502 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 503     p_condvar->init = 0;
 504     return 0;
 505 #endif
 506
 507     if( i_result )
 508     {
 509         msg_Err( p_condvar->p_this,
 510                  "thread %d: cond_destroy failed at %s:%d (%d:%s)",
 511                  i_thread, psz_file, i_line, i_result, psz_error );
 512     }
 513     return i_result;
 514 }
 515
 516 /*****************************************************************************
 517  * vlc_thread_create: create a thread, inner version
 518  *****************************************************************************
 519  * Note that i_priority is only taken into account on platforms supporting
 520  * userland real-time priority threads.
 521  *****************************************************************************/
 522 int __vlc_thread_create( vlc_object_t *p_this, char * psz_file, int i_line,
 523                          char *psz_name, void * ( *func ) ( void * ),
 524                          int i_priority, vlc_bool_t b_wait )
 525 {
 526     int i_ret;
 527
 528     vlc_mutex_lock( &p_this->object_lock );
 529
 530 #ifdef GPROF
 531     wrapper_t wrapper;
 532
 533     /* Initialize the wrapper structure */
 534     wrapper.func = func;
 535     wrapper.p_data = (void *)p_this;
 536     getitimer( ITIMER_PROF, &wrapper.itimer );
 537     vlc_mutex_init( p_this, &wrapper.lock );
 538     vlc_cond_init( p_this, &wrapper.wait );
 539     vlc_mutex_lock( &wrapper.lock );
 540
 541     /* Alter user-passed data so that we call the wrapper instead
 542      * of the real function */
 543     p_data = &wrapper;
 544     func = vlc_thread_wrapper;
 545 #endif
 546
 547 #if defined( PTH_INIT_IN_PTH_H )
 548     p_this->thread_id = pth_spawn( PTH_ATTR_DEFAULT, func, (void *)p_this );
 549     i_ret = 0;
 550
 551 #elif defined( ST_INIT_IN_ST_H )
 552     p_this->thread_id = st_thread_create( func, (void *)p_this, 1, 0 );
 553     i_ret = 0;
 554
 555 #elif defined( WIN32 )
 556     {
 557         unsigned threadID;
 558         /* When using the MSVCRT C library you have to use the _beginthreadex
 559          * function instead of CreateThread, otherwise you'll end up with
 560          * memory leaks and the signal functions not working (see Microsoft
 561          * Knowledge Base, article 104641) */
 562         p_this->thread_id =
 563 #if defined( UNDER_CE )
 564                 (HANDLE)CreateThread( NULL, 0, (PTHREAD_START) func,
 565                                       (void *)p_this, 0, &threadID );
 566 #else
 567                 (HANDLE)_beginthreadex( NULL, 0, (PTHREAD_START) func,
 568                                         (void *)p_this, 0, &threadID );
 569 #endif
 570     }
 571
 572     if ( p_this->thread_id && i_priority )
 573     {
 574         if ( !SetThreadPriority(p_this->thread_id, i_priority) )
 575         {
 576             msg_Warn( p_this, "couldn't set a faster priority" );
 577             i_priority = 0;
 578         }
 579     }
 580
 581     i_ret = ( p_this->thread_id ? 0 : 1 );
 582
 583 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 584     i_ret = pthread_create( &p_this->thread_id, NULL, func, (void *)p_this );
 585
 586     if ( i_priority )
 587     {
 588         struct sched_param param;
 589         memset( &param, 0, sizeof(struct sched_param) );
 590         param.sched_priority = i_priority;
 591         if ( pthread_setschedparam( p_this->thread_id, SCHED_RR, &param ) )
 592         {
 593             msg_Warn( p_this, "couldn't go to real-time priority" );
 594             i_priority = 0;
 595         }
 596     }
 597
 598 #elif defined( HAVE_CTHREADS_H )
 599     p_this->thread_id = cthread_fork( (cthread_fn_t)func, (any_t)p_this );
 600     i_ret = 0;
 601
 602 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 603     p_this->thread_id = spawn_thread( (thread_func)func, psz_name,
 604                                       B_NORMAL_PRIORITY, (void *)p_this );
 605     i_ret = resume_thread( p_this->thread_id );
 606
 607 #endif
 608
 609 #ifdef GPROF
 610     if( i_ret == 0 )
 611     {
 612         vlc_cond_wait( &wrapper.wait, &wrapper.lock );
 613     }
 614
 615     vlc_mutex_unlock( &wrapper.lock );
 616     vlc_mutex_destroy( &wrapper.lock );
 617     vlc_cond_destroy( &wrapper.wait );
 618 #endif
 619
 620     if( i_ret == 0 )
 621     {
 622         if( b_wait )
 623         {
 624             msg_Dbg( p_this, "waiting for thread completion" );
 625             vlc_cond_wait( &p_this->object_wait, &p_this->object_lock );
 626         }
 627
 628         p_this->b_thread = 1;
 629
 630         msg_Dbg( p_this, "thread %d (%s) created at priority %d (%s:%d)",
 631                  p_this->thread_id, psz_name, i_priority,
 632                  psz_file, i_line );
 633
 634         vlc_mutex_unlock( &p_this->object_lock );
 635     }
 636     else
 637     {
 638 #ifdef HAVE_STRERROR
 639         msg_Err( p_this, "%s thread could not be created at %s:%d (%s)",
 640                          psz_name, psz_file, i_line, strerror(i_ret) );
 641 #else
 642         msg_Err( p_this, "%s thread could not be created at %s:%d",
 643                          psz_name, psz_file, i_line );
 644 #endif
 645         vlc_mutex_unlock( &p_this->object_lock );
 646     }
 647
 648     return i_ret;
 649 }
 650
 651 /*****************************************************************************
 652  * vlc_thread_ready: tell the parent thread we were successfully spawned
 653  *****************************************************************************/
 654 void __vlc_thread_ready( vlc_object_t *p_this )
 655 {
 656     vlc_mutex_lock( &p_this->object_lock );
 657     vlc_cond_signal( &p_this->object_wait );
 658     vlc_mutex_unlock( &p_this->object_lock );
 659 }
 660
 661 /*****************************************************************************
 662  * vlc_thread_join: wait until a thread exits, inner version
 663  *****************************************************************************/
 664 void __vlc_thread_join( vlc_object_t *p_this, char * psz_file, int i_line )
 665 {
 666     int i_ret = 0;
 667
 668 #if defined( PTH_INIT_IN_PTH_H )
 669     i_ret = pth_join( p_this->thread_id, NULL );
 670
 671 #elif defined( ST_INIT_IN_ST_H )
 672     i_ret = st_thread_join( p_this->thread_id, NULL );
 673
 674 #elif defined( WIN32 )
 675     WaitForSingleObject( p_this->thread_id, INFINITE );
 676
 677 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 678     i_ret = pthread_join( p_this->thread_id, NULL );
 679
 680 #elif defined( HAVE_CTHREADS_H )
 681     cthread_join( p_this->thread_id );
 682     i_ret = 1;
 683
 684 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 685     int32 exit_value;
 686     wait_for_thread( p_this->thread_id, &exit_value );
 687
 688 #endif
 689
 690     if( i_ret )
 691     {
 692 #ifdef HAVE_STRERROR
 693         msg_Err( p_this, "thread_join(%d) failed at %s:%d (%s)",
 694                          p_this->thread_id, psz_file, i_line, strerror(i_ret) );
 695 #else
 696         msg_Err( p_this, "thread_join(%d) failed at %s:%d",
 697                          p_this->thread_id, psz_file, i_line );
 698 #endif
 699     }
 700     else
 701     {
 702         msg_Dbg( p_this, "thread %d joined (%s:%d)",
 703                          p_this->thread_id, psz_file, i_line );
 704     }
 705
 706     p_this->b_thread = 0;
 707 }
 708
 709 /*****************************************************************************
 710  * vlc_thread_wrapper: wrapper around thread functions used when profiling.
 711  *****************************************************************************/
 712 #ifdef GPROF
 713 static void *vlc_thread_wrapper( void *p_wrapper )
 714 {
 715     /* Put user data in thread-local variables */
 716     void *            p_data = ((wrapper_t*)p_wrapper)->p_data;
 717     vlc_thread_func_t func   = ((wrapper_t*)p_wrapper)->func;
 718
 719     /* Set the profile timer value */
 720     setitimer( ITIMER_PROF, &((wrapper_t*)p_wrapper)->itimer, NULL );
 721
 722     /* Tell the calling thread that we don't need its data anymore */
 723     vlc_mutex_lock( &((wrapper_t*)p_wrapper)->lock );
 724     vlc_cond_signal( &((wrapper_t*)p_wrapper)->wait );
 725     vlc_mutex_unlock( &((wrapper_t*)p_wrapper)->lock );
 726
 727     /* Call the real function */
 728     return func( p_data );
 729 }
 730 #endif