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 1.24 2002/11/10 18:04:24 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( WIN32 )
  81     HINSTANCE hInstLib;
  82 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
  83     pthread_mutex_lock( &once_mutex );
  84 #elif defined( HAVE_CTHREADS_H )
  85 #elif defined( HAVE_KERNEL_SCHEDULER_H )
  86 #endif
  87
  88     if( i_status == VLC_THREADS_UNINITIALIZED )
  89     {
  90         i_status = VLC_THREADS_PENDING;
  91
  92         /* We should be safe now. Do all the initialization stuff we want. */
  93         vlc_object_create( p_libvlc, VLC_OBJECT_ROOT );
  94         p_libvlc->b_ready = VLC_FALSE;
  95
  96 #if defined( PTH_INIT_IN_PTH_H )
  97         i_ret = pth_init();
  98
  99 #elif defined( ST_INIT_IN_ST_H )
 100         i_ret = st_init();
 101
 102 #elif defined( UNDER_CE )
 103         /* Nothing to initialize */
 104
 105 #elif defined( WIN32 )
 106         /* Dynamically get the address of SignalObjectAndWait */
 107         if( GetVersion() < 0x80000000 )
 108         {
 109             /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 110             hInstLib = LoadLibrary( "kernel32" );
 111             if( hInstLib )
 112             {
 113                 p_libvlc->SignalObjectAndWait =
 114                     (SIGNALOBJECTANDWAIT)GetProcAddress( hInstLib,
 115                                                      "SignalObjectAndWait" );
 116             }
 117         }
 118         else
 119         {
 120             p_libvlc->SignalObjectAndWait = NULL;
 121         }
 122
 123         p_libvlc->b_fast_mutex = 0;
 124         p_libvlc->i_win9x_cv = 0;
 125
 126 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 127 #elif defined( HAVE_CTHREADS_H )
 128 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 129 #endif
 130
 131         if( i_ret )
 132         {
 133             i_status = VLC_THREADS_ERROR;
 134         }
 135         else
 136         {
 137             i_initializations++;
 138             i_status = VLC_THREADS_READY;
 139         }
 140     }
 141     else
 142     {
 143         /* Just increment the initialization count */
 144         i_initializations++;
 145     }
 146
 147     /* If we have lazy mutex initialization support, unlock the mutex;
 148      * otherwize, do a naive wait loop. */
 149 #if defined( PTH_INIT_IN_PTH_H )
 150     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 151 #elif defined( ST_INIT_IN_ST_H )
 152     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 153 #elif defined( WIN32 )
 154     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 155 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 156     pthread_mutex_unlock( &once_mutex );
 157 #elif defined( HAVE_CTHREADS_H )
 158     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 159 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 160     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 161 #endif
 162
 163     if( i_status != VLC_THREADS_READY )
 164     {
 165         return VLC_ETHREAD;
 166     }
 167
 168     return i_ret;
 169 }
 170
 171 /*****************************************************************************
 172  * vlc_threads_end: stop threads system
 173  *****************************************************************************
 174  * FIXME: This function is far from being threadsafe. We should undo exactly
 175  * what we did above in vlc_threads_init.
 176  *****************************************************************************/
 177 int __vlc_threads_end( vlc_object_t *p_this )
 178 {
 179 #if defined( PTH_INIT_IN_PTH_H )
 180     i_initializations--;
 181     if( i_initializations == 0 )
 182     {
 183         return pth_kill();
 184     }
 185
 186 #elif defined( ST_INIT_IN_ST_H )
 187     i_initializations--;
 188
 189 #elif defined( WIN32 )
 190     i_initializations--;
 191
 192 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 193     pthread_mutex_lock( &once_mutex );
 194     i_initializations--;
 195     pthread_mutex_unlock( &once_mutex );
 196
 197 #elif defined( HAVE_CTHREADS_H )
 198     i_initializations--;
 199
 200 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 201     i_initializations--;
 202
 203 #endif
 204     return VLC_SUCCESS;
 205 }
 206
 207 /*****************************************************************************
 208  * Prototype for GPROF wrapper
 209  *****************************************************************************/
 210 #ifdef GPROF
 211 /* Wrapper function for profiling */
 212 static void *      vlc_thread_wrapper ( void *p_wrapper );
 213
 214 #   ifdef WIN32
 215
 216 #       define ITIMER_REAL 1
 217 #       define ITIMER_PROF 2
 218
 219 struct itimerval
 220 {
 221     struct timeval it_value;
 222     struct timeval it_interval;
 223 };
 224
 225 int setitimer(int kind, const struct itimerval* itnew, struct itimerval* itold);
 226 #   endif /* WIN32 */
 227
 228 typedef struct wrapper_t
 229 {
 230     /* Data lock access */
 231     vlc_mutex_t lock;
 232     vlc_cond_t  wait;
 233
 234     /* Data used to spawn the real thread */
 235     vlc_thread_func_t func;
 236     void *p_data;
 237
 238     /* Profiling timer passed to the thread */
 239     struct itimerval itimer;
 240
 241 } wrapper_t;
 242
 243 #endif /* GPROF */
 244
 245 /*****************************************************************************
 246  * vlc_mutex_init: initialize a mutex
 247  *****************************************************************************/
 248 int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 249 {
 250     p_mutex->p_this = p_this;
 251
 252 #if defined( PTH_INIT_IN_PTH_H )
 253     return pth_mutex_init( &p_mutex->mutex );
 254
 255 #elif defined( ST_INIT_IN_ST_H )
 256     p_mutex->mutex = st_mutex_new();
 257     return ( p_mutex->mutex == NULL ) ? errno : 0;
 258
 259 #elif defined( WIN32 )
 260     /* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
 261      * function and have a 100% correct vlc_cond_wait() implementation.
 262      * As this function is not available on Win9x, we can use the faster
 263      * CriticalSections */
 264 #   if !defined( UNDER_CE )
 265     if( p_this->p_libvlc->SignalObjectAndWait &&
 266         !p_this->p_libvlc->b_fast_mutex )
 267     {
 268         /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 269         p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
 270         return ( p_mutex->mutex != NULL ? 0 : 1 );
 271     }
 272     else
 273 #   endif
 274     {
 275         p_mutex->mutex = NULL;
 276         InitializeCriticalSection( &p_mutex->csection );
 277         return 0;
 278     }
 279
 280 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 281 #   if defined(DEBUG) && defined(SYS_LINUX)
 282     {
 283         /* Create error-checking mutex to detect problems more easily. */
 284         pthread_mutexattr_t attr;
 285         int                 i_result;
 286
 287         pthread_mutexattr_init( &attr );
 288         pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 289         i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 290         pthread_mutexattr_destroy( &attr );
 291         return( i_result );
 292     }
 293 #   endif
 294     return pthread_mutex_init( &p_mutex->mutex, NULL );
 295
 296 #elif defined( HAVE_CTHREADS_H )
 297     mutex_init( p_mutex );
 298     return 0;
 299
 300 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 301     /* check the arguments and whether it's already been initialized */
 302     if( p_mutex == NULL )
 303     {
 304         return B_BAD_VALUE;
 305     }
 306
 307     if( p_mutex->init == 9999 )
 308     {
 309         return EALREADY;
 310     }
 311
 312     p_mutex->lock = create_sem( 1, "BeMutex" );
 313     if( p_mutex->lock < B_NO_ERROR )
 314     {
 315         return( -1 );
 316     }
 317
 318     p_mutex->init = 9999;
 319     return B_OK;
 320
 321 #endif
 322 }
 323
 324 /*****************************************************************************
 325  * vlc_mutex_destroy: destroy a mutex, inner version
 326  *****************************************************************************/
 327 int __vlc_mutex_destroy( char * psz_file, int i_line, vlc_mutex_t *p_mutex )
 328 {
 329     int i_result;
 330     /* In case of error : */
 331     int i_thread = -1;
 332     const char * psz_error = "";
 333
 334 #if defined( PTH_INIT_IN_PTH_H )
 335     return 0;
 336
 337 #elif defined( ST_INIT_IN_ST_H )
 338     i_result = st_mutex_destroy( p_mutex->mutex );
 339
 340 #elif defined( WIN32 )
 341     if( p_mutex->mutex )
 342     {
 343         CloseHandle( p_mutex->mutex );
 344     }
 345     else
 346     {
 347         DeleteCriticalSection( &p_mutex->csection );
 348     }
 349     return 0;
 350
 351 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 352     i_result = pthread_mutex_destroy( &p_mutex->mutex );
 353     if ( i_result )
 354     {
 355         i_thread = (int)pthread_self();
 356         psz_error = strerror(i_result);
 357     }
 358
 359 #elif defined( HAVE_CTHREADS_H )
 360     return 0;
 361
 362 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 363     if( p_mutex->init == 9999 )
 364     {
 365         delete_sem( p_mutex->lock );
 366     }
 367
 368     p_mutex->init = 0;
 369     return B_OK;
 370 #endif
 371
 372     if( i_result )
 373     {
 374         msg_Err( p_mutex->p_this,
 375                  "thread %d: mutex_destroy failed at %s:%d (%d:%s)",
 376                  i_thread, psz_file, i_line, i_result, psz_error );
 377     }
 378     return i_result;
 379 }
 380
 381 /*****************************************************************************
 382  * vlc_cond_init: initialize a condition
 383  *****************************************************************************/
 384 int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar )
 385 {
 386     p_condvar->p_this = p_this;
 387
 388 #if defined( PTH_INIT_IN_PTH_H )
 389     return pth_cond_init( &p_condvar->cond );
 390
 391 #elif defined( ST_INIT_IN_ST_H )
 392     p_condvar->cond = st_cond_new();
 393     return ( p_condvar->cond == NULL ) ? errno : 0;
 394
 395 #elif defined( WIN32 )
 396     /* Initialize counter */
 397     p_condvar->i_waiting_threads = 0;
 398
 399 #   if !defined( UNDER_CE )
 400     /* Misc init */
 401     p_condvar->i_win9x_cv = p_this->p_libvlc->i_win9x_cv;
 402     p_condvar->SignalObjectAndWait = p_this->p_libvlc->SignalObjectAndWait;
 403
 404     if( (p_condvar->SignalObjectAndWait && !p_this->p_libvlc->b_fast_mutex)
 405         || p_condvar->i_win9x_cv == 0 )
 406     {
 407 #   endif
 408         /* Create an auto-reset event. */
 409         p_condvar->event = CreateEvent( NULL,   /* no security */
 410                                         FALSE,  /* auto-reset event */
 411                                         FALSE,  /* start non-signaled */
 412                                         NULL ); /* unnamed */
 413
 414         p_condvar->semaphore = NULL;
 415         return !p_condvar->event;
 416 #   if !defined( UNDER_CE )
 417     }
 418     else
 419     {
 420         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
 421                                                 0,          /* initial count */
 422                                                 0x7fffffff, /* max count */
 423                                                 NULL );     /* unnamed */
 424
 425         if( p_condvar->i_win9x_cv == 1 )
 426             /* Create a manual-reset event initially signaled. */
 427             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
 428         else
 429             /* Create a auto-reset event. */
 430             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
 431
 432         InitializeCriticalSection( &p_condvar->csection );
 433
 434         return !p_condvar->semaphore || !p_condvar->event;
 435     }
 436 #   endif
 437
 438 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 439     return pthread_cond_init( &p_condvar->cond, NULL );
 440
 441 #elif defined( HAVE_CTHREADS_H )
 442     /* condition_init() */
 443     spin_lock_init( &p_condvar->lock );
 444     cthread_queue_init( &p_condvar->queue );
 445     p_condvar->name = 0;
 446     p_condvar->implications = 0;
 447
 448     return 0;
 449
 450 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 451     if( !p_condvar )
 452     {
 453         return B_BAD_VALUE;
 454     }
 455
 456     if( p_condvar->init == 9999 )
 457     {
 458         return EALREADY;
 459     }
 460
 461     p_condvar->thread = -1;
 462     p_condvar->init = 9999;
 463     return 0;
 464 #endif
 465 }
 466
 467 /*****************************************************************************
 468  * vlc_cond_destroy: destroy a condition, inner version
 469  *****************************************************************************/
 470 int __vlc_cond_destroy( char * psz_file, int i_line, vlc_cond_t *p_condvar )
 471 {
 472     int i_result;
 473     /* In case of error : */
 474     int i_thread = -1;
 475     const char * psz_error = "";
 476
 477 #if defined( PTH_INIT_IN_PTH_H )
 478     return 0;
 479
 480 #elif defined( ST_INIT_IN_ST_H )
 481     i_result = st_cond_destroy( p_condvar->cond );
 482
 483 #elif defined( WIN32 )
 484     if( !p_condvar->semaphore )
 485         i_result = !CloseHandle( p_condvar->event );
 486     else
 487         i_result = !CloseHandle( p_condvar->event )
 488           || !CloseHandle( p_condvar->semaphore );
 489
 490 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 491     i_result = pthread_cond_destroy( &p_condvar->cond );
 492     if ( i_result )
 493     {
 494         i_thread = (int)pthread_self();
 495         psz_error = strerror(i_result);
 496     }
 497
 498 #elif defined( HAVE_CTHREADS_H )
 499     return 0;
 500
 501 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 502     p_condvar->init = 0;
 503     return 0;
 504 #endif
 505
 506     if( i_result )
 507     {
 508         msg_Err( p_condvar->p_this,
 509                  "thread %d: cond_destroy failed at %s:%d (%d:%s)",
 510                  i_thread, psz_file, i_line, i_result, psz_error );
 511     }
 512     return i_result;
 513 }
 514
 515 /*****************************************************************************
 516  * vlc_thread_create: create a thread, inner version
 517  *****************************************************************************
 518  * Note that i_priority is only taken into account on platforms supporting
 519  * userland real-time priority threads.
 520  *****************************************************************************/
 521 int __vlc_thread_create( vlc_object_t *p_this, char * psz_file, int i_line,
 522                          char *psz_name, void * ( *func ) ( void * ),
 523                          int i_priority, vlc_bool_t b_wait )
 524 {
 525     int i_ret;
 526
 527     vlc_mutex_lock( &p_this->object_lock );
 528
 529 #ifdef GPROF
 530     wrapper_t wrapper;
 531
 532     /* Initialize the wrapper structure */
 533     wrapper.func = func;
 534     wrapper.p_data = (void *)p_this;
 535     getitimer( ITIMER_PROF, &wrapper.itimer );
 536     vlc_mutex_init( p_this, &wrapper.lock );
 537     vlc_cond_init( p_this, &wrapper.wait );
 538     vlc_mutex_lock( &wrapper.lock );
 539
 540     /* Alter user-passed data so that we call the wrapper instead
 541      * of the real function */
 542     p_data = &wrapper;
 543     func = vlc_thread_wrapper;
 544 #endif
 545
 546 #if defined( PTH_INIT_IN_PTH_H )
 547     p_this->thread_id = pth_spawn( PTH_ATTR_DEFAULT, func, (void *)p_this );
 548     i_ret = 0;
 549
 550 #elif defined( ST_INIT_IN_ST_H )
 551     p_this->thread_id = st_thread_create( func, (void *)p_this, 1, 0 );
 552     i_ret = 0;
 553
 554 #elif defined( WIN32 )
 555     {
 556         unsigned threadID;
 557         /* When using the MSVCRT C library you have to use the _beginthreadex
 558          * function instead of CreateThread, otherwise you'll end up with
 559          * memory leaks and the signal functions not working */
 560         p_this->thread_id =
 561                 (HANDLE)_beginthreadex( NULL, 0, (PTHREAD_START) func,
 562                                         (void *)p_this, 0, &threadID );
 563     }
 564
 565     if ( p_this->thread_id && i_priority )
 566     {
 567         if ( !SetThreadPriority(p_this->thread_id, i_priority) )
 568         {
 569             msg_Warn( p_this, "couldn't set a faster priority" );
 570             i_priority = 0;
 571         }
 572     }
 573
 574     i_ret = ( p_this->thread_id ? 0 : 1 );
 575
 576 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 577     i_ret = pthread_create( &p_this->thread_id, NULL, func, (void *)p_this );
 578
 579     if ( i_priority )
 580     {
 581         struct sched_param param;
 582         memset( &param, 0, sizeof(struct sched_param) );
 583         param.sched_priority = i_priority;
 584         if ( pthread_setschedparam( p_this->thread_id, SCHED_RR, &param ) )
 585         {
 586             msg_Warn( p_this, "couldn't go to real-time priority" );
 587             i_priority = 0;
 588         }
 589     }
 590
 591 #elif defined( HAVE_CTHREADS_H )
 592     p_this->thread_id = cthread_fork( (cthread_fn_t)func, (any_t)p_this );
 593     i_ret = 0;
 594
 595 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 596     p_this->thread_id = spawn_thread( (thread_func)func, psz_name,
 597                                       B_NORMAL_PRIORITY, (void *)p_this );
 598     i_ret = resume_thread( p_this->thread_id );
 599
 600 #endif
 601
 602 #ifdef GPROF
 603     if( i_ret == 0 )
 604     {
 605         vlc_cond_wait( &wrapper.wait, &wrapper.lock );
 606     }
 607
 608     vlc_mutex_unlock( &wrapper.lock );
 609     vlc_mutex_destroy( &wrapper.lock );
 610     vlc_cond_destroy( &wrapper.wait );
 611 #endif
 612
 613     if( i_ret == 0 )
 614     {
 615         if( b_wait )
 616         {
 617             msg_Dbg( p_this, "waiting for thread completion" );
 618             vlc_cond_wait( &p_this->object_wait, &p_this->object_lock );
 619         }
 620
 621         p_this->b_thread = 1;
 622
 623         msg_Dbg( p_this, "thread %d (%s) created at priority %d (%s:%d)",
 624                  p_this->thread_id, psz_name, i_priority,
 625                  psz_file, i_line );
 626
 627         vlc_mutex_unlock( &p_this->object_lock );
 628     }
 629     else
 630     {
 631         msg_Err( p_this, "%s thread could not be created at %s:%d (%s)",
 632                          psz_name, psz_file, i_line, strerror(i_ret) );
 633         vlc_mutex_unlock( &p_this->object_lock );
 634     }
 635
 636     return i_ret;
 637 }
 638
 639 /*****************************************************************************
 640  * vlc_thread_ready: tell the parent thread we were successfully spawned
 641  *****************************************************************************/
 642 void __vlc_thread_ready( vlc_object_t *p_this )
 643 {
 644     vlc_mutex_lock( &p_this->object_lock );
 645     vlc_cond_signal( &p_this->object_wait );
 646     vlc_mutex_unlock( &p_this->object_lock );
 647 }
 648
 649 /*****************************************************************************
 650  * vlc_thread_join: wait until a thread exits, inner version
 651  *****************************************************************************/
 652 void __vlc_thread_join( vlc_object_t *p_this, char * psz_file, int i_line )
 653 {
 654     int i_ret = 0;
 655
 656 #if defined( PTH_INIT_IN_PTH_H )
 657     i_ret = pth_join( p_this->thread_id, NULL );
 658
 659 #elif defined( ST_INIT_IN_ST_H )
 660     i_ret = st_thread_join( p_this->thread_id, NULL );
 661
 662 #elif defined( WIN32 )
 663     WaitForSingleObject( p_this->thread_id, INFINITE );
 664
 665 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 666     i_ret = pthread_join( p_this->thread_id, NULL );
 667
 668 #elif defined( HAVE_CTHREADS_H )
 669     cthread_join( p_this->thread_id );
 670     i_ret = 1;
 671
 672 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 673     int32 exit_value;
 674     wait_for_thread( p_this->thread_id, &exit_value );
 675
 676 #endif
 677
 678     if( i_ret )
 679     {
 680         msg_Err( p_this, "thread_join(%d) failed at %s:%d (%s)",
 681                          p_this->thread_id, psz_file, i_line, strerror(i_ret) );
 682     }
 683     else
 684     {
 685         msg_Dbg( p_this, "thread %d joined (%s:%d)",
 686                          p_this->thread_id, psz_file, i_line );
 687     }
 688
 689     p_this->b_thread = 0;
 690 }
 691
 692 /*****************************************************************************
 693  * vlc_thread_wrapper: wrapper around thread functions used when profiling.
 694  *****************************************************************************/
 695 #ifdef GPROF
 696 static void *vlc_thread_wrapper( void *p_wrapper )
 697 {
 698     /* Put user data in thread-local variables */
 699     void *            p_data = ((wrapper_t*)p_wrapper)->p_data;
 700     vlc_thread_func_t func   = ((wrapper_t*)p_wrapper)->func;
 701
 702     /* Set the profile timer value */
 703     setitimer( ITIMER_PROF, &((wrapper_t*)p_wrapper)->itimer, NULL );
 704
 705     /* Tell the calling thread that we don't need its data anymore */
 706     vlc_mutex_lock( &((wrapper_t*)p_wrapper)->lock );
 707     vlc_cond_signal( &((wrapper_t*)p_wrapper)->wait );
 708     vlc_mutex_unlock( &((wrapper_t*)p_wrapper)->lock );
 709
 710     /* Call the real function */
 711     return func( p_data );
 712 }
 713 #endif