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 1.22 2002/10/15 08:35:24 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 static vlc_namedmutex_t *p_named_list = NULL;
  63 static vlc_mutex_t named_lock;
  64
  65 /*****************************************************************************
  66  * vlc_threads_init: initialize threads system
  67  *****************************************************************************
  68  * This function requires lazy initialization of a global lock in order to
  69  * keep the library really thread-safe. Some architectures don't support this
  70  * and thus do not guarantee the complete reentrancy.
  71  *****************************************************************************/
  72 int __vlc_threads_init( vlc_object_t *p_this )
  73 {
  74     static volatile int i_status = VLC_THREADS_UNINITIALIZED;
  75
  76     libvlc_t *p_libvlc = (libvlc_t *)p_this;
  77     int i_ret = VLC_SUCCESS;
  78
  79     /* If we have lazy mutex initialization, use it. Otherwise, we just
  80      * hope nothing wrong happens. */
  81 #if defined( PTH_INIT_IN_PTH_H )
  82 #elif defined( ST_INIT_IN_ST_H )
  83 #elif defined( WIN32 )
  84     HINSTANCE hInstLib;
  85 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
  86     pthread_mutex_lock( &once_mutex );
  87 #elif defined( HAVE_CTHREADS_H )
  88 #elif defined( HAVE_KERNEL_SCHEDULER_H )
  89 #endif
  90
  91     if( i_status == VLC_THREADS_UNINITIALIZED )
  92     {
  93         i_status = VLC_THREADS_PENDING;
  94
  95         /* We should be safe now. Do all the initialization stuff we want. */
  96         vlc_object_create( p_libvlc, VLC_OBJECT_ROOT );
  97         p_libvlc->b_ready = VLC_FALSE;
  98
  99 #if defined( PTH_INIT_IN_PTH_H )
 100         i_ret = pth_init();
 101
 102 #elif defined( ST_INIT_IN_ST_H )
 103         i_ret = st_init();
 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         vlc_mutex_init( p_libvlc, &named_lock );
 132
 133         if( i_ret )
 134         {
 135             i_status = VLC_THREADS_ERROR;
 136         }
 137         else
 138         {
 139             i_initializations++;
 140             i_status = VLC_THREADS_READY;
 141         }
 142     }
 143     else
 144     {
 145         /* Just increment the initialization count */
 146         i_initializations++;
 147     }
 148
 149     /* If we have lazy mutex initialization support, unlock the mutex;
 150      * otherwize, do a naive wait loop. */
 151 #if defined( PTH_INIT_IN_PTH_H )
 152     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 153 #elif defined( ST_INIT_IN_ST_H )
 154     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 155 #elif defined( WIN32 )
 156     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 157 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 158     pthread_mutex_unlock( &once_mutex );
 159 #elif defined( HAVE_CTHREADS_H )
 160     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 161 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 162     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 163 #endif
 164
 165     if( i_status != VLC_THREADS_READY )
 166     {
 167         return VLC_ETHREAD;
 168     }
 169
 170     return i_ret;
 171 }
 172
 173 /*****************************************************************************
 174  * vlc_threads_end: stop threads system
 175  *****************************************************************************
 176  * FIXME: This function is far from being threadsafe. We should undo exactly
 177  * what we did above in vlc_threads_init.
 178  *****************************************************************************/
 179 int __vlc_threads_end( vlc_object_t *p_this )
 180 {
 181 #if defined( PTH_INIT_IN_PTH_H )
 182     i_initializations--;
 183     if( i_initializations == 0 )
 184     {
 185         return pth_kill();
 186     }
 187
 188 #elif defined( ST_INIT_IN_ST_H )
 189     i_initializations--;
 190
 191 #elif defined( WIN32 )
 192     i_initializations--;
 193
 194 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 195     pthread_mutex_lock( &once_mutex );
 196     i_initializations--;
 197     pthread_mutex_unlock( &once_mutex );
 198
 199 #elif defined( HAVE_CTHREADS_H )
 200     i_initializations--;
 201
 202 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 203     i_initializations--;
 204
 205 #endif
 206     return VLC_SUCCESS;
 207 }
 208
 209 /*****************************************************************************
 210  * Prototype for GPROF wrapper
 211  *****************************************************************************/
 212 #ifdef GPROF
 213 /* Wrapper function for profiling */
 214 static void *      vlc_thread_wrapper ( void *p_wrapper );
 215
 216 #   ifdef WIN32
 217
 218 #       define ITIMER_REAL 1
 219 #       define ITIMER_PROF 2
 220
 221 struct itimerval
 222 {
 223     struct timeval it_value;
 224     struct timeval it_interval;
 225 };
 226
 227 int setitimer(int kind, const struct itimerval* itnew, struct itimerval* itold);
 228 #   endif /* WIN32 */
 229
 230 typedef struct wrapper_t
 231 {
 232     /* Data lock access */
 233     vlc_mutex_t lock;
 234     vlc_cond_t  wait;
 235
 236     /* Data used to spawn the real thread */
 237     vlc_thread_func_t func;
 238     void *p_data;
 239
 240     /* Profiling timer passed to the thread */
 241     struct itimerval itimer;
 242
 243 } wrapper_t;
 244
 245 #endif /* GPROF */
 246
 247 /*****************************************************************************
 248  * vlc_mutex_init: initialize a mutex
 249  *****************************************************************************/
 250 int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 251 {
 252     p_mutex->p_this = p_this;
 253
 254 #if defined( PTH_INIT_IN_PTH_H )
 255     return pth_mutex_init( &p_mutex->mutex );
 256
 257 #elif defined( ST_INIT_IN_ST_H )
 258     p_mutex->mutex = st_mutex_new();
 259     return ( p_mutex->mutex == NULL ) ? errno : 0;
 260
 261 #elif defined( WIN32 )
 262     /* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
 263      * function and have a 100% correct vlc_cond_wait() implementation.
 264      * As this function is not available on Win9x, we can use the faster
 265      * CriticalSections */
 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     {
 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     /* Misc init */
 400     p_condvar->i_win9x_cv = p_this->p_libvlc->i_win9x_cv;
 401     p_condvar->SignalObjectAndWait = p_this->p_libvlc->SignalObjectAndWait;
 402
 403     if( (p_condvar->SignalObjectAndWait && !p_this->p_libvlc->b_fast_mutex)
 404         || p_condvar->i_win9x_cv == 0 )
 405     {
 406         /* Create an auto-reset event. */
 407         p_condvar->event = CreateEvent( NULL,   /* no security */
 408                                         FALSE,  /* auto-reset event */
 409                                         FALSE,  /* start non-signaled */
 410                                         NULL ); /* unnamed */
 411
 412         p_condvar->semaphore = NULL;
 413         return !p_condvar->event;
 414     }
 415     else
 416     {
 417         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
 418                                                 0,          /* initial count */
 419                                                 0x7fffffff, /* max count */
 420                                                 NULL );     /* unnamed */
 421
 422         if( p_condvar->i_win9x_cv == 1 )
 423             /* Create a manual-reset event initially signaled. */
 424             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
 425         else
 426             /* Create a auto-reset event. */
 427             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
 428
 429         InitializeCriticalSection( &p_condvar->csection );
 430
 431         return !p_condvar->semaphore || !p_condvar->event;
 432     }
 433
 434 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 435     return pthread_cond_init( &p_condvar->cond, NULL );
 436
 437 #elif defined( HAVE_CTHREADS_H )
 438     /* condition_init() */
 439     spin_lock_init( &p_condvar->lock );
 440     cthread_queue_init( &p_condvar->queue );
 441     p_condvar->name = 0;
 442     p_condvar->implications = 0;
 443
 444     return 0;
 445
 446 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 447     if( !p_condvar )
 448     {
 449         return B_BAD_VALUE;
 450     }
 451
 452     if( p_condvar->init == 9999 )
 453     {
 454         return EALREADY;
 455     }
 456
 457     p_condvar->thread = -1;
 458     p_condvar->init = 9999;
 459     return 0;
 460 #endif
 461 }
 462
 463 /*****************************************************************************
 464  * vlc_cond_destroy: destroy a condition, inner version
 465  *****************************************************************************/
 466 int __vlc_cond_destroy( char * psz_file, int i_line, vlc_cond_t *p_condvar )
 467 {
 468     int i_result;
 469     /* In case of error : */
 470     int i_thread = -1;
 471     const char * psz_error = "";
 472
 473 #if defined( PTH_INIT_IN_PTH_H )
 474     return 0;
 475
 476 #elif defined( ST_INIT_IN_ST_H )
 477     i_result = st_cond_destroy( p_condvar->cond );
 478
 479 #elif defined( WIN32 )
 480     if( !p_condvar->semaphore )
 481         i_result = !CloseHandle( p_condvar->event );
 482     else
 483         i_result = !CloseHandle( p_condvar->event )
 484           || !CloseHandle( p_condvar->semaphore );
 485
 486 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 487     i_result = pthread_cond_destroy( &p_condvar->cond );
 488     if ( i_result )
 489     {
 490         i_thread = (int)pthread_self();
 491         psz_error = strerror(i_result);
 492     }
 493
 494 #elif defined( HAVE_CTHREADS_H )
 495     return 0;
 496
 497 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 498     p_condvar->init = 0;
 499     return 0;
 500 #endif
 501
 502     if( i_result )
 503     {
 504         msg_Err( p_condvar->p_this,
 505                  "thread %d: cond_destroy failed at %s:%d (%d:%s)",
 506                  i_thread, psz_file, i_line, i_result, psz_error );
 507     }
 508     return i_result;
 509 }
 510
 511 /*****************************************************************************
 512  * vlc_thread_create: create a thread, inner version
 513  *****************************************************************************
 514  * Note that i_priority is only taken into account on platforms supporting
 515  * userland real-time priority threads.
 516  *****************************************************************************/
 517 int __vlc_thread_create( vlc_object_t *p_this, char * psz_file, int i_line,
 518                          char *psz_name, void * ( *func ) ( void * ),
 519                          int i_priority, vlc_bool_t b_wait )
 520 {
 521     int i_ret;
 522
 523     vlc_mutex_lock( &p_this->object_lock );
 524
 525 #ifdef GPROF
 526     wrapper_t wrapper;
 527
 528     /* Initialize the wrapper structure */
 529     wrapper.func = func;
 530     wrapper.p_data = (void *)p_this;
 531     getitimer( ITIMER_PROF, &wrapper.itimer );
 532     vlc_mutex_init( p_this, &wrapper.lock );
 533     vlc_cond_init( p_this, &wrapper.wait );
 534     vlc_mutex_lock( &wrapper.lock );
 535
 536     /* Alter user-passed data so that we call the wrapper instead
 537      * of the real function */
 538     p_data = &wrapper;
 539     func = vlc_thread_wrapper;
 540 #endif
 541
 542 #if defined( PTH_INIT_IN_PTH_H )
 543     p_this->thread_id = pth_spawn( PTH_ATTR_DEFAULT, func, (void *)p_this );
 544     i_ret = 0;
 545
 546 #elif defined( ST_INIT_IN_ST_H )
 547     p_this->thread_id = st_thread_create( func, (void *)p_this, 1, 0 );
 548     i_ret = 0;
 549
 550 #elif defined( WIN32 )
 551     {
 552         unsigned threadID;
 553         /* When using the MSVCRT C library you have to use the _beginthreadex
 554          * function instead of CreateThread, otherwise you'll end up with
 555          * memory leaks and the signal functions not working */
 556         p_this->thread_id =
 557                 (HANDLE)_beginthreadex( NULL, 0, (PTHREAD_START) func,
 558                                         (void *)p_this, 0, &threadID );
 559     }
 560
 561     if ( p_this->thread_id && i_priority )
 562     {
 563         if ( !SetThreadPriority(p_this->thread_id, i_priority) )
 564         {
 565             msg_Warn( p_this, "couldn't set a faster priority" );
 566             i_priority = 0;
 567         }
 568     }
 569
 570     i_ret = ( p_this->thread_id ? 0 : 1 );
 571
 572 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 573     i_ret = pthread_create( &p_this->thread_id, NULL, func, (void *)p_this );
 574
 575     if ( i_priority )
 576     {
 577         struct sched_param param;
 578         memset( &param, 0, sizeof(struct sched_param) );
 579         param.sched_priority = i_priority;
 580         if ( pthread_setschedparam( p_this->thread_id, SCHED_RR, &param ) )
 581         {
 582             msg_Warn( p_this, "couldn't go to real-time priority" );
 583             i_priority = 0;
 584         }
 585     }
 586
 587 #elif defined( HAVE_CTHREADS_H )
 588     p_this->thread_id = cthread_fork( (cthread_fn_t)func, (any_t)p_this );
 589     i_ret = 0;
 590
 591 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 592     p_this->thread_id = spawn_thread( (thread_func)func, psz_name,
 593                                       B_NORMAL_PRIORITY, (void *)p_this );
 594     i_ret = resume_thread( p_this->thread_id );
 595
 596 #endif
 597
 598 #ifdef GPROF
 599     if( i_ret == 0 )
 600     {
 601         vlc_cond_wait( &wrapper.wait, &wrapper.lock );
 602     }
 603
 604     vlc_mutex_unlock( &wrapper.lock );
 605     vlc_mutex_destroy( &wrapper.lock );
 606     vlc_cond_destroy( &wrapper.wait );
 607 #endif
 608
 609     if( i_ret == 0 )
 610     {
 611         if( b_wait )
 612         {
 613             msg_Dbg( p_this, "waiting for thread completion" );
 614             vlc_cond_wait( &p_this->object_wait, &p_this->object_lock );
 615         }
 616
 617         p_this->b_thread = 1;
 618
 619         msg_Dbg( p_this, "thread %d (%s) created at priority %d (%s:%d)",
 620                  p_this->thread_id, psz_name, i_priority,
 621                  psz_file, i_line );
 622
 623         vlc_mutex_unlock( &p_this->object_lock );
 624     }
 625     else
 626     {
 627         msg_Err( p_this, "%s thread could not be created at %s:%d (%s)",
 628                          psz_name, psz_file, i_line, strerror(i_ret) );
 629         vlc_mutex_unlock( &p_this->object_lock );
 630     }
 631
 632     return i_ret;
 633 }
 634
 635 /*****************************************************************************
 636  * vlc_thread_ready: tell the parent thread we were successfully spawned
 637  *****************************************************************************/
 638 void __vlc_thread_ready( vlc_object_t *p_this )
 639 {
 640     vlc_mutex_lock( &p_this->object_lock );
 641     vlc_cond_signal( &p_this->object_wait );
 642     vlc_mutex_unlock( &p_this->object_lock );
 643 }
 644
 645 /*****************************************************************************
 646  * vlc_thread_join: wait until a thread exits, inner version
 647  *****************************************************************************/
 648 void __vlc_thread_join( vlc_object_t *p_this, char * psz_file, int i_line )
 649 {
 650     int i_ret = 0;
 651
 652 #if defined( PTH_INIT_IN_PTH_H )
 653     i_ret = pth_join( p_this->thread_id, NULL );
 654
 655 #elif defined( ST_INIT_IN_ST_H )
 656     i_ret = st_thread_join( p_this->thread_id, NULL );
 657
 658 #elif defined( WIN32 )
 659     WaitForSingleObject( p_this->thread_id, INFINITE );
 660
 661 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 662     i_ret = pthread_join( p_this->thread_id, NULL );
 663
 664 #elif defined( HAVE_CTHREADS_H )
 665     cthread_join( p_this->thread_id );
 666     i_ret = 1;
 667
 668 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 669     int32 exit_value;
 670     wait_for_thread( p_this->thread_id, &exit_value );
 671
 672 #endif
 673
 674     if( i_ret )
 675     {
 676         msg_Err( p_this, "thread_join(%d) failed at %s:%d (%s)",
 677                          p_this->thread_id, psz_file, i_line, strerror(i_ret) );
 678     }
 679     else
 680     {
 681         msg_Dbg( p_this, "thread %d joined (%s:%d)",
 682                          p_this->thread_id, psz_file, i_line );
 683     }
 684
 685     p_this->b_thread = 0;
 686 }
 687
 688 /*****************************************************************************
 689  * vlc_thread_wrapper: wrapper around thread functions used when profiling.
 690  *****************************************************************************/
 691 #ifdef GPROF
 692 static void *vlc_thread_wrapper( void *p_wrapper )
 693 {
 694     /* Put user data in thread-local variables */
 695     void *            p_data = ((wrapper_t*)p_wrapper)->p_data;
 696     vlc_thread_func_t func   = ((wrapper_t*)p_wrapper)->func;
 697
 698     /* Set the profile timer value */
 699     setitimer( ITIMER_PROF, &((wrapper_t*)p_wrapper)->itimer, NULL );
 700
 701     /* Tell the calling thread that we don't need its data anymore */
 702     vlc_mutex_lock( &((wrapper_t*)p_wrapper)->lock );
 703     vlc_cond_signal( &((wrapper_t*)p_wrapper)->wait );
 704     vlc_mutex_unlock( &((wrapper_t*)p_wrapper)->lock );
 705
 706     /* Call the real function */
 707     return func( p_data );
 708 }
 709 #endif