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 1.23 2002/10/16 10:31:58 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( WIN32 )
 103         /* Dynamically get the address of SignalObjectAndWait */
 104         if( GetVersion() < 0x80000000 )
 105         {
 106             /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 107             hInstLib = LoadLibrary( "kernel32" );
 108             if( hInstLib )
 109             {
 110                 p_libvlc->SignalObjectAndWait =
 111                     (SIGNALOBJECTANDWAIT)GetProcAddress( hInstLib,
 112                                                      "SignalObjectAndWait" );
 113             }
 114         }
 115         else
 116         {
 117             p_libvlc->SignalObjectAndWait = NULL;
 118         }
 119
 120         p_libvlc->b_fast_mutex = 0;
 121         p_libvlc->i_win9x_cv = 0;
 122
 123 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 124 #elif defined( HAVE_CTHREADS_H )
 125 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 126 #endif
 127
 128         if( i_ret )
 129         {
 130             i_status = VLC_THREADS_ERROR;
 131         }
 132         else
 133         {
 134             i_initializations++;
 135             i_status = VLC_THREADS_READY;
 136         }
 137     }
 138     else
 139     {
 140         /* Just increment the initialization count */
 141         i_initializations++;
 142     }
 143
 144     /* If we have lazy mutex initialization support, unlock the mutex;
 145      * otherwize, do a naive wait loop. */
 146 #if defined( PTH_INIT_IN_PTH_H )
 147     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 148 #elif defined( ST_INIT_IN_ST_H )
 149     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 150 #elif defined( WIN32 )
 151     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 152 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 153     pthread_mutex_unlock( &once_mutex );
 154 #elif defined( HAVE_CTHREADS_H )
 155     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 156 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 157     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 158 #endif
 159
 160     if( i_status != VLC_THREADS_READY )
 161     {
 162         return VLC_ETHREAD;
 163     }
 164
 165     return i_ret;
 166 }
 167
 168 /*****************************************************************************
 169  * vlc_threads_end: stop threads system
 170  *****************************************************************************
 171  * FIXME: This function is far from being threadsafe. We should undo exactly
 172  * what we did above in vlc_threads_init.
 173  *****************************************************************************/
 174 int __vlc_threads_end( vlc_object_t *p_this )
 175 {
 176 #if defined( PTH_INIT_IN_PTH_H )
 177     i_initializations--;
 178     if( i_initializations == 0 )
 179     {
 180         return pth_kill();
 181     }
 182
 183 #elif defined( ST_INIT_IN_ST_H )
 184     i_initializations--;
 185
 186 #elif defined( WIN32 )
 187     i_initializations--;
 188
 189 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 190     pthread_mutex_lock( &once_mutex );
 191     i_initializations--;
 192     pthread_mutex_unlock( &once_mutex );
 193
 194 #elif defined( HAVE_CTHREADS_H )
 195     i_initializations--;
 196
 197 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 198     i_initializations--;
 199
 200 #endif
 201     return VLC_SUCCESS;
 202 }
 203
 204 /*****************************************************************************
 205  * Prototype for GPROF wrapper
 206  *****************************************************************************/
 207 #ifdef GPROF
 208 /* Wrapper function for profiling */
 209 static void *      vlc_thread_wrapper ( void *p_wrapper );
 210
 211 #   ifdef WIN32
 212
 213 #       define ITIMER_REAL 1
 214 #       define ITIMER_PROF 2
 215
 216 struct itimerval
 217 {
 218     struct timeval it_value;
 219     struct timeval it_interval;
 220 };
 221
 222 int setitimer(int kind, const struct itimerval* itnew, struct itimerval* itold);
 223 #   endif /* WIN32 */
 224
 225 typedef struct wrapper_t
 226 {
 227     /* Data lock access */
 228     vlc_mutex_t lock;
 229     vlc_cond_t  wait;
 230
 231     /* Data used to spawn the real thread */
 232     vlc_thread_func_t func;
 233     void *p_data;
 234
 235     /* Profiling timer passed to the thread */
 236     struct itimerval itimer;
 237
 238 } wrapper_t;
 239
 240 #endif /* GPROF */
 241
 242 /*****************************************************************************
 243  * vlc_mutex_init: initialize a mutex
 244  *****************************************************************************/
 245 int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 246 {
 247     p_mutex->p_this = p_this;
 248
 249 #if defined( PTH_INIT_IN_PTH_H )
 250     return pth_mutex_init( &p_mutex->mutex );
 251
 252 #elif defined( ST_INIT_IN_ST_H )
 253     p_mutex->mutex = st_mutex_new();
 254     return ( p_mutex->mutex == NULL ) ? errno : 0;
 255
 256 #elif defined( WIN32 )
 257     /* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
 258      * function and have a 100% correct vlc_cond_wait() implementation.
 259      * As this function is not available on Win9x, we can use the faster
 260      * CriticalSections */
 261     if( p_this->p_libvlc->SignalObjectAndWait &&
 262         !p_this->p_libvlc->b_fast_mutex )
 263     {
 264         /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 265         p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
 266         return ( p_mutex->mutex != NULL ? 0 : 1 );
 267     }
 268     else
 269     {
 270         p_mutex->mutex = NULL;
 271         InitializeCriticalSection( &p_mutex->csection );
 272         return 0;
 273     }
 274
 275 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 276 #   if defined(DEBUG) && defined(SYS_LINUX)
 277     {
 278         /* Create error-checking mutex to detect problems more easily. */
 279         pthread_mutexattr_t attr;
 280         int                 i_result;
 281
 282         pthread_mutexattr_init( &attr );
 283         pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 284         i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 285         pthread_mutexattr_destroy( &attr );
 286         return( i_result );
 287     }
 288 #   endif
 289     return pthread_mutex_init( &p_mutex->mutex, NULL );
 290
 291 #elif defined( HAVE_CTHREADS_H )
 292     mutex_init( p_mutex );
 293     return 0;
 294
 295 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 296     /* check the arguments and whether it's already been initialized */
 297     if( p_mutex == NULL )
 298     {
 299         return B_BAD_VALUE;
 300     }
 301
 302     if( p_mutex->init == 9999 )
 303     {
 304         return EALREADY;
 305     }
 306
 307     p_mutex->lock = create_sem( 1, "BeMutex" );
 308     if( p_mutex->lock < B_NO_ERROR )
 309     {
 310         return( -1 );
 311     }
 312
 313     p_mutex->init = 9999;
 314     return B_OK;
 315
 316 #endif
 317 }
 318
 319 /*****************************************************************************
 320  * vlc_mutex_destroy: destroy a mutex, inner version
 321  *****************************************************************************/
 322 int __vlc_mutex_destroy( char * psz_file, int i_line, vlc_mutex_t *p_mutex )
 323 {
 324     int i_result;
 325     /* In case of error : */
 326     int i_thread = -1;
 327     const char * psz_error = "";
 328
 329 #if defined( PTH_INIT_IN_PTH_H )
 330     return 0;
 331
 332 #elif defined( ST_INIT_IN_ST_H )
 333     i_result = st_mutex_destroy( p_mutex->mutex );
 334
 335 #elif defined( WIN32 )
 336     if( p_mutex->mutex )
 337     {
 338         CloseHandle( p_mutex->mutex );
 339     }
 340     else
 341     {
 342         DeleteCriticalSection( &p_mutex->csection );
 343     }
 344     return 0;
 345
 346 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 347     i_result = pthread_mutex_destroy( &p_mutex->mutex );
 348     if ( i_result )
 349     {
 350         i_thread = (int)pthread_self();
 351         psz_error = strerror(i_result);
 352     }
 353
 354 #elif defined( HAVE_CTHREADS_H )
 355     return 0;
 356
 357 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 358     if( p_mutex->init == 9999 )
 359     {
 360         delete_sem( p_mutex->lock );
 361     }
 362
 363     p_mutex->init = 0;
 364     return B_OK;
 365 #endif
 366
 367     if( i_result )
 368     {
 369         msg_Err( p_mutex->p_this,
 370                  "thread %d: mutex_destroy failed at %s:%d (%d:%s)",
 371                  i_thread, psz_file, i_line, i_result, psz_error );
 372     }
 373     return i_result;
 374 }
 375
 376 /*****************************************************************************
 377  * vlc_cond_init: initialize a condition
 378  *****************************************************************************/
 379 int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar )
 380 {
 381     p_condvar->p_this = p_this;
 382
 383 #if defined( PTH_INIT_IN_PTH_H )
 384     return pth_cond_init( &p_condvar->cond );
 385
 386 #elif defined( ST_INIT_IN_ST_H )
 387     p_condvar->cond = st_cond_new();
 388     return ( p_condvar->cond == NULL ) ? errno : 0;
 389
 390 #elif defined( WIN32 )
 391     /* Initialize counter */
 392     p_condvar->i_waiting_threads = 0;
 393
 394     /* Misc init */
 395     p_condvar->i_win9x_cv = p_this->p_libvlc->i_win9x_cv;
 396     p_condvar->SignalObjectAndWait = p_this->p_libvlc->SignalObjectAndWait;
 397
 398     if( (p_condvar->SignalObjectAndWait && !p_this->p_libvlc->b_fast_mutex)
 399         || p_condvar->i_win9x_cv == 0 )
 400     {
 401         /* Create an auto-reset event. */
 402         p_condvar->event = CreateEvent( NULL,   /* no security */
 403                                         FALSE,  /* auto-reset event */
 404                                         FALSE,  /* start non-signaled */
 405                                         NULL ); /* unnamed */
 406
 407         p_condvar->semaphore = NULL;
 408         return !p_condvar->event;
 409     }
 410     else
 411     {
 412         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
 413                                                 0,          /* initial count */
 414                                                 0x7fffffff, /* max count */
 415                                                 NULL );     /* unnamed */
 416
 417         if( p_condvar->i_win9x_cv == 1 )
 418             /* Create a manual-reset event initially signaled. */
 419             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
 420         else
 421             /* Create a auto-reset event. */
 422             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
 423
 424         InitializeCriticalSection( &p_condvar->csection );
 425
 426         return !p_condvar->semaphore || !p_condvar->event;
 427     }
 428
 429 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 430     return pthread_cond_init( &p_condvar->cond, NULL );
 431
 432 #elif defined( HAVE_CTHREADS_H )
 433     /* condition_init() */
 434     spin_lock_init( &p_condvar->lock );
 435     cthread_queue_init( &p_condvar->queue );
 436     p_condvar->name = 0;
 437     p_condvar->implications = 0;
 438
 439     return 0;
 440
 441 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 442     if( !p_condvar )
 443     {
 444         return B_BAD_VALUE;
 445     }
 446
 447     if( p_condvar->init == 9999 )
 448     {
 449         return EALREADY;
 450     }
 451
 452     p_condvar->thread = -1;
 453     p_condvar->init = 9999;
 454     return 0;
 455 #endif
 456 }
 457
 458 /*****************************************************************************
 459  * vlc_cond_destroy: destroy a condition, inner version
 460  *****************************************************************************/
 461 int __vlc_cond_destroy( char * psz_file, int i_line, vlc_cond_t *p_condvar )
 462 {
 463     int i_result;
 464     /* In case of error : */
 465     int i_thread = -1;
 466     const char * psz_error = "";
 467
 468 #if defined( PTH_INIT_IN_PTH_H )
 469     return 0;
 470
 471 #elif defined( ST_INIT_IN_ST_H )
 472     i_result = st_cond_destroy( p_condvar->cond );
 473
 474 #elif defined( WIN32 )
 475     if( !p_condvar->semaphore )
 476         i_result = !CloseHandle( p_condvar->event );
 477     else
 478         i_result = !CloseHandle( p_condvar->event )
 479           || !CloseHandle( p_condvar->semaphore );
 480
 481 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 482     i_result = pthread_cond_destroy( &p_condvar->cond );
 483     if ( i_result )
 484     {
 485         i_thread = (int)pthread_self();
 486         psz_error = strerror(i_result);
 487     }
 488
 489 #elif defined( HAVE_CTHREADS_H )
 490     return 0;
 491
 492 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 493     p_condvar->init = 0;
 494     return 0;
 495 #endif
 496
 497     if( i_result )
 498     {
 499         msg_Err( p_condvar->p_this,
 500                  "thread %d: cond_destroy failed at %s:%d (%d:%s)",
 501                  i_thread, psz_file, i_line, i_result, psz_error );
 502     }
 503     return i_result;
 504 }
 505
 506 /*****************************************************************************
 507  * vlc_thread_create: create a thread, inner version
 508  *****************************************************************************
 509  * Note that i_priority is only taken into account on platforms supporting
 510  * userland real-time priority threads.
 511  *****************************************************************************/
 512 int __vlc_thread_create( vlc_object_t *p_this, char * psz_file, int i_line,
 513                          char *psz_name, void * ( *func ) ( void * ),
 514                          int i_priority, vlc_bool_t b_wait )
 515 {
 516     int i_ret;
 517
 518     vlc_mutex_lock( &p_this->object_lock );
 519
 520 #ifdef GPROF
 521     wrapper_t wrapper;
 522
 523     /* Initialize the wrapper structure */
 524     wrapper.func = func;
 525     wrapper.p_data = (void *)p_this;
 526     getitimer( ITIMER_PROF, &wrapper.itimer );
 527     vlc_mutex_init( p_this, &wrapper.lock );
 528     vlc_cond_init( p_this, &wrapper.wait );
 529     vlc_mutex_lock( &wrapper.lock );
 530
 531     /* Alter user-passed data so that we call the wrapper instead
 532      * of the real function */
 533     p_data = &wrapper;
 534     func = vlc_thread_wrapper;
 535 #endif
 536
 537 #if defined( PTH_INIT_IN_PTH_H )
 538     p_this->thread_id = pth_spawn( PTH_ATTR_DEFAULT, func, (void *)p_this );
 539     i_ret = 0;
 540
 541 #elif defined( ST_INIT_IN_ST_H )
 542     p_this->thread_id = st_thread_create( func, (void *)p_this, 1, 0 );
 543     i_ret = 0;
 544
 545 #elif defined( WIN32 )
 546     {
 547         unsigned threadID;
 548         /* When using the MSVCRT C library you have to use the _beginthreadex
 549          * function instead of CreateThread, otherwise you'll end up with
 550          * memory leaks and the signal functions not working */
 551         p_this->thread_id =
 552                 (HANDLE)_beginthreadex( NULL, 0, (PTHREAD_START) func,
 553                                         (void *)p_this, 0, &threadID );
 554     }
 555
 556     if ( p_this->thread_id && i_priority )
 557     {
 558         if ( !SetThreadPriority(p_this->thread_id, i_priority) )
 559         {
 560             msg_Warn( p_this, "couldn't set a faster priority" );
 561             i_priority = 0;
 562         }
 563     }
 564
 565     i_ret = ( p_this->thread_id ? 0 : 1 );
 566
 567 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 568     i_ret = pthread_create( &p_this->thread_id, NULL, func, (void *)p_this );
 569
 570     if ( i_priority )
 571     {
 572         struct sched_param param;
 573         memset( &param, 0, sizeof(struct sched_param) );
 574         param.sched_priority = i_priority;
 575         if ( pthread_setschedparam( p_this->thread_id, SCHED_RR, &param ) )
 576         {
 577             msg_Warn( p_this, "couldn't go to real-time priority" );
 578             i_priority = 0;
 579         }
 580     }
 581
 582 #elif defined( HAVE_CTHREADS_H )
 583     p_this->thread_id = cthread_fork( (cthread_fn_t)func, (any_t)p_this );
 584     i_ret = 0;
 585
 586 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 587     p_this->thread_id = spawn_thread( (thread_func)func, psz_name,
 588                                       B_NORMAL_PRIORITY, (void *)p_this );
 589     i_ret = resume_thread( p_this->thread_id );
 590
 591 #endif
 592
 593 #ifdef GPROF
 594     if( i_ret == 0 )
 595     {
 596         vlc_cond_wait( &wrapper.wait, &wrapper.lock );
 597     }
 598
 599     vlc_mutex_unlock( &wrapper.lock );
 600     vlc_mutex_destroy( &wrapper.lock );
 601     vlc_cond_destroy( &wrapper.wait );
 602 #endif
 603
 604     if( i_ret == 0 )
 605     {
 606         if( b_wait )
 607         {
 608             msg_Dbg( p_this, "waiting for thread completion" );
 609             vlc_cond_wait( &p_this->object_wait, &p_this->object_lock );
 610         }
 611
 612         p_this->b_thread = 1;
 613
 614         msg_Dbg( p_this, "thread %d (%s) created at priority %d (%s:%d)",
 615                  p_this->thread_id, psz_name, i_priority,
 616                  psz_file, i_line );
 617
 618         vlc_mutex_unlock( &p_this->object_lock );
 619     }
 620     else
 621     {
 622         msg_Err( p_this, "%s thread could not be created at %s:%d (%s)",
 623                          psz_name, psz_file, i_line, strerror(i_ret) );
 624         vlc_mutex_unlock( &p_this->object_lock );
 625     }
 626
 627     return i_ret;
 628 }
 629
 630 /*****************************************************************************
 631  * vlc_thread_ready: tell the parent thread we were successfully spawned
 632  *****************************************************************************/
 633 void __vlc_thread_ready( vlc_object_t *p_this )
 634 {
 635     vlc_mutex_lock( &p_this->object_lock );
 636     vlc_cond_signal( &p_this->object_wait );
 637     vlc_mutex_unlock( &p_this->object_lock );
 638 }
 639
 640 /*****************************************************************************
 641  * vlc_thread_join: wait until a thread exits, inner version
 642  *****************************************************************************/
 643 void __vlc_thread_join( vlc_object_t *p_this, char * psz_file, int i_line )
 644 {
 645     int i_ret = 0;
 646
 647 #if defined( PTH_INIT_IN_PTH_H )
 648     i_ret = pth_join( p_this->thread_id, NULL );
 649
 650 #elif defined( ST_INIT_IN_ST_H )
 651     i_ret = st_thread_join( p_this->thread_id, NULL );
 652
 653 #elif defined( WIN32 )
 654     WaitForSingleObject( p_this->thread_id, INFINITE );
 655
 656 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 657     i_ret = pthread_join( p_this->thread_id, NULL );
 658
 659 #elif defined( HAVE_CTHREADS_H )
 660     cthread_join( p_this->thread_id );
 661     i_ret = 1;
 662
 663 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 664     int32 exit_value;
 665     wait_for_thread( p_this->thread_id, &exit_value );
 666
 667 #endif
 668
 669     if( i_ret )
 670     {
 671         msg_Err( p_this, "thread_join(%d) failed at %s:%d (%s)",
 672                          p_this->thread_id, psz_file, i_line, strerror(i_ret) );
 673     }
 674     else
 675     {
 676         msg_Dbg( p_this, "thread %d joined (%s:%d)",
 677                          p_this->thread_id, psz_file, i_line );
 678     }
 679
 680     p_this->b_thread = 0;
 681 }
 682
 683 /*****************************************************************************
 684  * vlc_thread_wrapper: wrapper around thread functions used when profiling.
 685  *****************************************************************************/
 686 #ifdef GPROF
 687 static void *vlc_thread_wrapper( void *p_wrapper )
 688 {
 689     /* Put user data in thread-local variables */
 690     void *            p_data = ((wrapper_t*)p_wrapper)->p_data;
 691     vlc_thread_func_t func   = ((wrapper_t*)p_wrapper)->func;
 692
 693     /* Set the profile timer value */
 694     setitimer( ITIMER_PROF, &((wrapper_t*)p_wrapper)->itimer, NULL );
 695
 696     /* Tell the calling thread that we don't need its data anymore */
 697     vlc_mutex_lock( &((wrapper_t*)p_wrapper)->lock );
 698     vlc_cond_signal( &((wrapper_t*)p_wrapper)->wait );
 699     vlc_mutex_unlock( &((wrapper_t*)p_wrapper)->lock );
 700
 701     /* Call the real function */
 702     return func( p_data );
 703 }
 704 #endif