git.sesse.net Git - vlc/blob - src/misc/threads.c

   1 /*****************************************************************************
   2  * threads.c : threads implementation for the VideoLAN client
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 the VideoLAN team
   5  * $Id$
   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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, 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 unsigned i_initializations = 0;
  39 static volatile int i_status = VLC_THREADS_UNINITIALIZED;
  40 static vlc_object_t *p_root;
  41
  42 #if defined( PTH_INIT_IN_PTH_H )
  43 #elif defined( ST_INIT_IN_ST_H )
  44 #elif defined( UNDER_CE )
  45 #elif defined( WIN32 )
  46 #elif defined( HAVE_KERNEL_SCHEDULER_H )
  47 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
  48     static pthread_mutex_t once_mutex = PTHREAD_MUTEX_INITIALIZER;
  49 #elif defined( HAVE_CTHREADS_H )
  50 #endif
  51
  52 vlc_threadvar_t msg_context_global_key;
  53
  54 /*****************************************************************************
  55  * vlc_threads_init: initialize threads system
  56  *****************************************************************************
  57  * This function requires lazy initialization of a global lock in order to
  58  * keep the library really thread-safe. Some architectures don't support this
  59  * and thus do not guarantee the complete reentrancy.
  60  *****************************************************************************/
  61 int __vlc_threads_init( vlc_object_t *p_this )
  62 {
  63     libvlc_global_data_t *p_libvlc_global = (libvlc_global_data_t *)p_this;
  64     int i_ret = VLC_SUCCESS;
  65
  66     /* If we have lazy mutex initialization, use it. Otherwise, we just
  67      * hope nothing wrong happens. */
  68 #if defined( PTH_INIT_IN_PTH_H )
  69 #elif defined( ST_INIT_IN_ST_H )
  70 #elif defined( UNDER_CE )
  71 #elif defined( WIN32 )
  72 #elif defined( HAVE_KERNEL_SCHEDULER_H )
  73 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
  74     pthread_mutex_lock( &once_mutex );
  75 #elif defined( HAVE_CTHREADS_H )
  76 #endif
  77
  78     if( i_status == VLC_THREADS_UNINITIALIZED )
  79     {
  80         i_status = VLC_THREADS_PENDING;
  81
  82         /* We should be safe now. Do all the initialization stuff we want. */
  83         p_libvlc_global->b_ready = VLC_FALSE;
  84
  85 #if defined( PTH_INIT_IN_PTH_H )
  86         i_ret = ( pth_init() == FALSE );
  87
  88 #elif defined( ST_INIT_IN_ST_H )
  89         i_ret = st_init();
  90
  91 #elif defined( UNDER_CE )
  92         /* Nothing to initialize */
  93
  94 #elif defined( WIN32 )
  95         /* Dynamically get the address of SignalObjectAndWait */
  96         if( GetVersion() < 0x80000000 )
  97         {
  98             HINSTANCE hInstLib;
  99
 100             /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 101             hInstLib = LoadLibrary( "kernel32" );
 102             if( hInstLib )
 103             {
 104                 p_libvlc_global->SignalObjectAndWait =
 105                     (SIGNALOBJECTANDWAIT)GetProcAddress( hInstLib,
 106                                                      "SignalObjectAndWait" );
 107             }
 108         }
 109         else
 110         {
 111             p_libvlc_global->SignalObjectAndWait = NULL;
 112         }
 113
 114         p_libvlc_global->b_fast_mutex = 0;
 115         p_libvlc_global->i_win9x_cv = 0;
 116
 117 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 118 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 119 #elif defined( HAVE_CTHREADS_H )
 120 #endif
 121
 122         p_root = vlc_object_create( p_libvlc_global, VLC_OBJECT_GLOBAL );
 123         if( p_root == NULL )
 124             i_ret = VLC_ENOMEM;
 125
 126         if( i_ret )
 127         {
 128             i_status = VLC_THREADS_ERROR;
 129         }
 130         else
 131         {
 132             i_initializations++;
 133             i_status = VLC_THREADS_READY;
 134         }
 135
 136         vlc_threadvar_create( p_root, &msg_context_global_key );
 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( UNDER_CE )
 151     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 152 #elif defined( WIN32 )
 153     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 154 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 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 #endif
 161
 162     if( i_status != VLC_THREADS_READY )
 163     {
 164         return VLC_ETHREAD;
 165     }
 166
 167     return i_ret;
 168 }
 169
 170 /*****************************************************************************
 171  * vlc_threads_end: stop threads system
 172  *****************************************************************************
 173  * FIXME: This function is far from being threadsafe.
 174  *****************************************************************************/
 175 int __vlc_threads_end( vlc_object_t *p_this )
 176 {
 177 #if defined( PTH_INIT_IN_PTH_H )
 178 #elif defined( ST_INIT_IN_ST_H )
 179 #elif defined( UNDER_CE )
 180 #elif defined( WIN32 )
 181 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 182 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 183     pthread_mutex_lock( &once_mutex );
 184 #elif defined( HAVE_CTHREADS_H )
 185 #endif
 186
 187     if( i_initializations == 0 )
 188         return VLC_EGENERIC;
 189
 190     i_initializations--;
 191     if( i_initializations == 0 )
 192     {
 193         i_status = VLC_THREADS_UNINITIALIZED;
 194         vlc_object_destroy( p_root );
 195     }
 196
 197 #if defined( PTH_INIT_IN_PTH_H )
 198     if( i_initializations == 0 )
 199     {
 200         return ( pth_kill() == FALSE );
 201     }
 202
 203 #elif defined( ST_INIT_IN_ST_H )
 204 #elif defined( UNDER_CE )
 205 #elif defined( WIN32 )
 206 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 207 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 208     pthread_mutex_unlock( &once_mutex );
 209 #elif defined( HAVE_CTHREADS_H )
 210 #endif
 211     return VLC_SUCCESS;
 212 }
 213
 214 /*****************************************************************************
 215  * vlc_mutex_init: initialize a mutex
 216  *****************************************************************************/
 217 int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 218 {
 219     p_mutex->p_this = p_this;
 220
 221 #if defined( PTH_INIT_IN_PTH_H )
 222     return ( pth_mutex_init( &p_mutex->mutex ) == FALSE );
 223
 224 #elif defined( ST_INIT_IN_ST_H )
 225     p_mutex->mutex = st_mutex_new();
 226     return ( p_mutex->mutex == NULL ) ? errno : 0;
 227
 228 #elif defined( UNDER_CE )
 229     InitializeCriticalSection( &p_mutex->csection );
 230     return 0;
 231
 232 #elif defined( WIN32 )
 233     /* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
 234      * function and have a 100% correct vlc_cond_wait() implementation.
 235      * As this function is not available on Win9x, we can use the faster
 236      * CriticalSections */
 237     if( p_this->p_libvlc_global->SignalObjectAndWait &&
 238         !p_this->p_libvlc_global->b_fast_mutex )
 239     {
 240         /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 241         p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
 242         return ( p_mutex->mutex != NULL ? 0 : 1 );
 243     }
 244     else
 245     {
 246         p_mutex->mutex = NULL;
 247         InitializeCriticalSection( &p_mutex->csection );
 248         return 0;
 249     }
 250
 251 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 252     /* check the arguments and whether it's already been initialized */
 253     if( p_mutex == NULL )
 254     {
 255         return B_BAD_VALUE;
 256     }
 257
 258     if( p_mutex->init == 9999 )
 259     {
 260         return EALREADY;
 261     }
 262
 263     p_mutex->lock = create_sem( 1, "BeMutex" );
 264     if( p_mutex->lock < B_NO_ERROR )
 265     {
 266         return( -1 );
 267     }
 268
 269     p_mutex->init = 9999;
 270     return B_OK;
 271
 272 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 273 #   if defined(DEBUG) && defined(SYS_LINUX)
 274     {
 275         /* Create error-checking mutex to detect problems more easily. */
 276         pthread_mutexattr_t attr;
 277         int                 i_result;
 278
 279         pthread_mutexattr_init( &attr );
 280         pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 281         i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 282         pthread_mutexattr_destroy( &attr );
 283         return( i_result );
 284     }
 285 #   endif
 286     return pthread_mutex_init( &p_mutex->mutex, NULL );
 287
 288 #elif defined( HAVE_CTHREADS_H )
 289     mutex_init( p_mutex );
 290     return 0;
 291
 292 #endif
 293 }
 294
 295 /*****************************************************************************
 296  * vlc_mutex_destroy: destroy a mutex, inner version
 297  *****************************************************************************/
 298 int __vlc_mutex_destroy( const char * psz_file, int i_line, vlc_mutex_t *p_mutex )
 299 {
 300     int i_result;
 301     /* In case of error : */
 302     int i_thread = -1;
 303     const char * psz_error = "";
 304
 305 #if defined( PTH_INIT_IN_PTH_H )
 306     return 0;
 307
 308 #elif defined( ST_INIT_IN_ST_H )
 309     i_result = st_mutex_destroy( p_mutex->mutex );
 310
 311 #elif defined( UNDER_CE )
 312     DeleteCriticalSection( &p_mutex->csection );
 313     return 0;
 314
 315 #elif defined( WIN32 )
 316     if( p_mutex->mutex )
 317     {
 318         CloseHandle( p_mutex->mutex );
 319     }
 320     else
 321     {
 322         DeleteCriticalSection( &p_mutex->csection );
 323     }
 324     return 0;
 325
 326 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 327     if( p_mutex->init == 9999 )
 328     {
 329         delete_sem( p_mutex->lock );
 330     }
 331
 332     p_mutex->init = 0;
 333     return B_OK;
 334
 335 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 336     i_result = pthread_mutex_destroy( &p_mutex->mutex );
 337     if( i_result )
 338     {
 339         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 340         psz_error = strerror(i_result);
 341     }
 342
 343 #elif defined( HAVE_CTHREADS_H )
 344     return 0;
 345
 346 #endif
 347
 348     if( i_result )
 349     {
 350         msg_Err( p_mutex->p_this,
 351                  "thread %d: mutex_destroy failed at %s:%d (%d:%s)",
 352                  i_thread, psz_file, i_line, i_result, psz_error );
 353     }
 354     return i_result;
 355 }
 356
 357 /*****************************************************************************
 358  * vlc_cond_init: initialize a condition
 359  *****************************************************************************/
 360 int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar )
 361 {
 362     p_condvar->p_this = p_this;
 363
 364 #if defined( PTH_INIT_IN_PTH_H )
 365     return ( pth_cond_init( &p_condvar->cond ) == FALSE );
 366
 367 #elif defined( ST_INIT_IN_ST_H )
 368     p_condvar->cond = st_cond_new();
 369     return ( p_condvar->cond == NULL ) ? errno : 0;
 370
 371 #elif defined( UNDER_CE )
 372     /* Initialize counter */
 373     p_condvar->i_waiting_threads = 0;
 374
 375     /* Create an auto-reset event. */
 376     p_condvar->event = CreateEvent( NULL,   /* no security */
 377                                     FALSE,  /* auto-reset event */
 378                                     FALSE,  /* start non-signaled */
 379                                     NULL ); /* unnamed */
 380     return !p_condvar->event;
 381
 382 #elif defined( WIN32 )
 383     /* Initialize counter */
 384     p_condvar->i_waiting_threads = 0;
 385
 386     /* Misc init */
 387     p_condvar->i_win9x_cv = p_this->p_libvlc_global->i_win9x_cv;
 388     p_condvar->SignalObjectAndWait = p_this->p_libvlc_global->SignalObjectAndWait;
 389
 390     if( (p_condvar->SignalObjectAndWait &&
 391         !p_this->p_libvlc_global->b_fast_mutex)
 392         || p_condvar->i_win9x_cv == 0 )
 393     {
 394         /* Create an auto-reset event. */
 395         p_condvar->event = CreateEvent( NULL,   /* no security */
 396                                         FALSE,  /* auto-reset event */
 397                                         FALSE,  /* start non-signaled */
 398                                         NULL ); /* unnamed */
 399
 400         p_condvar->semaphore = NULL;
 401         return !p_condvar->event;
 402     }
 403     else
 404     {
 405         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
 406                                                 0,          /* initial count */
 407                                                 0x7fffffff, /* max count */
 408                                                 NULL );     /* unnamed */
 409
 410         if( p_condvar->i_win9x_cv == 1 )
 411             /* Create a manual-reset event initially signaled. */
 412             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
 413         else
 414             /* Create a auto-reset event. */
 415             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
 416
 417         InitializeCriticalSection( &p_condvar->csection );
 418
 419         return !p_condvar->semaphore || !p_condvar->event;
 420     }
 421
 422 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 423     if( !p_condvar )
 424     {
 425         return B_BAD_VALUE;
 426     }
 427
 428     if( p_condvar->init == 9999 )
 429     {
 430         return EALREADY;
 431     }
 432
 433     p_condvar->thread = -1;
 434     p_condvar->init = 9999;
 435     return 0;
 436
 437 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 438     return pthread_cond_init( &p_condvar->cond, NULL );
 439
 440 #elif defined( HAVE_CTHREADS_H )
 441     /* condition_init() */
 442     spin_lock_init( &p_condvar->lock );
 443     cthread_queue_init( &p_condvar->queue );
 444     p_condvar->name = 0;
 445     p_condvar->implications = 0;
 446
 447     return 0;
 448
 449 #endif
 450 }
 451
 452 /*****************************************************************************
 453  * vlc_cond_destroy: destroy a condition, inner version
 454  *****************************************************************************/
 455 int __vlc_cond_destroy( const char * psz_file, int i_line, vlc_cond_t *p_condvar )
 456 {
 457     int i_result;
 458     /* In case of error : */
 459     int i_thread = -1;
 460     const char * psz_error = "";
 461
 462 #if defined( PTH_INIT_IN_PTH_H )
 463     return 0;
 464
 465 #elif defined( ST_INIT_IN_ST_H )
 466     i_result = st_cond_destroy( p_condvar->cond );
 467
 468 #elif defined( UNDER_CE )
 469     i_result = !CloseHandle( p_condvar->event );
 470
 471 #elif defined( WIN32 )
 472     if( !p_condvar->semaphore )
 473         i_result = !CloseHandle( p_condvar->event );
 474     else
 475         i_result = !CloseHandle( p_condvar->event )
 476           || !CloseHandle( p_condvar->semaphore );
 477
 478     if( p_condvar->semaphore != NULL )
 479                 DeleteCriticalSection( &p_condvar->csection );
 480
 481 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 482     p_condvar->init = 0;
 483     return 0;
 484
 485 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 486     i_result = pthread_cond_destroy( &p_condvar->cond );
 487     if( i_result )
 488     {
 489         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 490         psz_error = strerror(i_result);
 491     }
 492
 493 #elif defined( HAVE_CTHREADS_H )
 494     return 0;
 495
 496 #endif
 497
 498     if( i_result )
 499     {
 500         msg_Err( p_condvar->p_this,
 501                  "thread %d: cond_destroy failed at %s:%d (%d:%s)",
 502                  i_thread, psz_file, i_line, i_result, psz_error );
 503     }
 504     return i_result;
 505 }
 506
 507 /*****************************************************************************
 508  * vlc_tls_create: create a thread-local variable
 509  *****************************************************************************/
 510 int __vlc_threadvar_create( vlc_object_t *p_this, vlc_threadvar_t *p_tls )
 511 {
 512     int i_ret;
 513 #if defined( PTH_INIT_IN_PTH_H )
 514     i_ret = pth_key_create( &p_tls->handle, NULL );
 515 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 516     msg_Err( p_this, "TLS not implemented" );
 517     i_ret VLC_EGENERIC;
 518 #elif defined( ST_INIT_IN_ST_H )
 519     i_ret = st_key_create( &p_tls->handle, NULL );
 520 #elif defined( UNDER_CE ) || defined( WIN32 )
 521 #elif defined( WIN32 )
 522     p_tls->handle = TlsAlloc();
 523     i_ret = !( p_tls->handle == 0xFFFFFFFF );
 524
 525 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 526     i_ret =  pthread_key_create( &p_tls->handle, NULL );
 527 #elif defined( HAVE_CTHREADS_H )
 528     i_ret = cthread_keycreate( &p_tls-handle );
 529 #endif
 530     return i_ret;
 531 }
 532
 533 /*****************************************************************************
 534  * vlc_thread_create: create a thread, inner version
 535  *****************************************************************************
 536  * Note that i_priority is only taken into account on platforms supporting
 537  * userland real-time priority threads.
 538  *****************************************************************************/
 539 int __vlc_thread_create( vlc_object_t *p_this, const char * psz_file, int i_line,
 540                          const char *psz_name, void * ( *func ) ( void * ),
 541                          int i_priority, vlc_bool_t b_wait )
 542 {
 543     int i_ret;
 544     void *p_data = (void *)p_this;
 545
 546     vlc_mutex_lock( &p_this->object_lock );
 547
 548 #if defined( PTH_INIT_IN_PTH_H )
 549     p_this->thread_id = pth_spawn( PTH_ATTR_DEFAULT, func, p_data );
 550     i_ret = p_this->thread_id == NULL;
 551
 552 #elif defined( ST_INIT_IN_ST_H )
 553     p_this->thread_id = st_thread_create( func, p_data, 1, 0 );
 554     i_ret = 0;
 555
 556 #elif defined( WIN32 ) || defined( UNDER_CE )
 557     {
 558         unsigned threadID;
 559         /* When using the MSVCRT C library you have to use the _beginthreadex
 560          * function instead of CreateThread, otherwise you'll end up with
 561          * memory leaks and the signal functions not working (see Microsoft
 562          * Knowledge Base, article 104641) */
 563         p_this->thread_id =
 564 #if defined( UNDER_CE )
 565                 (HANDLE)CreateThread( NULL, 0, (PTHREAD_START) func,
 566                                       p_data, 0, &threadID );
 567 #else
 568                 (HANDLE)_beginthreadex( NULL, 0, (PTHREAD_START) func,
 569                                         p_data, 0, &threadID );
 570 #endif
 571     }
 572
 573     if( p_this->thread_id && i_priority )
 574     {
 575         if( !SetThreadPriority(p_this->thread_id, i_priority) )
 576         {
 577             msg_Warn( p_this, "couldn't set a faster priority" );
 578             i_priority = 0;
 579         }
 580     }
 581
 582     i_ret = ( p_this->thread_id ? 0 : 1 );
 583
 584 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 585     p_this->thread_id = spawn_thread( (thread_func)func, psz_name,
 586                                       i_priority, p_data );
 587     i_ret = resume_thread( p_this->thread_id );
 588
 589 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 590     i_ret = pthread_create( &p_this->thread_id, NULL, func, p_data );
 591
 592 #ifndef __APPLE__
 593     if( config_GetInt( p_this, "rt-priority" ) )
 594 #endif
 595     {
 596         int i_error, i_policy;
 597         struct sched_param param;
 598
 599         memset( &param, 0, sizeof(struct sched_param) );
 600         if( config_GetType( p_this, "rt-offset" ) )
 601         {
 602             i_priority += config_GetInt( p_this, "rt-offset" );
 603         }
 604         if( i_priority <= 0 )
 605         {
 606             param.sched_priority = (-1) * i_priority;
 607             i_policy = SCHED_OTHER;
 608         }
 609         else
 610         {
 611             param.sched_priority = i_priority;
 612             i_policy = SCHED_RR;
 613         }
 614         if( (i_error = pthread_setschedparam( p_this->thread_id,
 615                                                i_policy, &param )) )
 616         {
 617             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s",
 618                       psz_file, i_line, strerror(i_error) );
 619             i_priority = 0;
 620         }
 621     }
 622 #ifndef __APPLE__
 623     else
 624     {
 625         i_priority = 0;
 626     }
 627 #endif
 628
 629 #elif defined( HAVE_CTHREADS_H )
 630     p_this->thread_id = cthread_fork( (cthread_fn_t)func, (any_t)p_data );
 631     i_ret = 0;
 632
 633 #endif
 634
 635     if( i_ret == 0 )
 636     {
 637         if( b_wait )
 638         {
 639             msg_Dbg( p_this, "waiting for thread completion" );
 640             vlc_cond_wait( &p_this->object_wait, &p_this->object_lock );
 641         }
 642
 643         p_this->b_thread = 1;
 644
 645         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 646                  (unsigned int)p_this->thread_id, psz_name, i_priority,
 647                  psz_file, i_line );
 648
 649         vlc_mutex_unlock( &p_this->object_lock );
 650     }
 651     else
 652     {
 653         msg_Err( p_this, "%s thread could not be created at %s:%d (%s)",
 654                          psz_name, psz_file, i_line, strerror(i_ret) );
 655         vlc_mutex_unlock( &p_this->object_lock );
 656     }
 657
 658     return i_ret;
 659 }
 660
 661 /*****************************************************************************
 662  * vlc_thread_set_priority: set the priority of the current thread when we
 663  * couldn't set it in vlc_thread_create (for instance for the main thread)
 664  *****************************************************************************/
 665 int __vlc_thread_set_priority( vlc_object_t *p_this, const char * psz_file,
 666                                int i_line, int i_priority )
 667 {
 668 #if defined( PTH_INIT_IN_PTH_H ) || defined( ST_INIT_IN_ST_H )
 669 #elif defined( WIN32 ) || defined( UNDER_CE )
 670     if( !SetThreadPriority(GetCurrentThread(), i_priority) )
 671     {
 672         msg_Warn( p_this, "couldn't set a faster priority" );
 673         return 1;
 674     }
 675
 676 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 677 #ifndef __APPLE__
 678     if( config_GetInt( p_this, "rt-priority" ) )
 679 #endif
 680     {
 681         int i_error, i_policy;
 682         struct sched_param param;
 683
 684         memset( &param, 0, sizeof(struct sched_param) );
 685         if( config_GetType( p_this, "rt-offset" ) )
 686         {
 687             i_priority += config_GetInt( p_this, "rt-offset" );
 688         }
 689         if( i_priority <= 0 )
 690         {
 691             param.sched_priority = (-1) * i_priority;
 692             i_policy = SCHED_OTHER;
 693         }
 694         else
 695         {
 696             param.sched_priority = i_priority;
 697             i_policy = SCHED_RR;
 698         }
 699         if( !p_this->thread_id )
 700             p_this->thread_id = pthread_self();
 701         if( (i_error = pthread_setschedparam( p_this->thread_id,
 702                                                i_policy, &param )) )
 703         {
 704             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s",
 705                       psz_file, i_line, strerror(i_error) );
 706             i_priority = 0;
 707         }
 708     }
 709 #endif
 710
 711     return 0;
 712 }
 713
 714 /*****************************************************************************
 715  * vlc_thread_ready: tell the parent thread we were successfully spawned
 716  *****************************************************************************/
 717 void __vlc_thread_ready( vlc_object_t *p_this )
 718 {
 719     vlc_mutex_lock( &p_this->object_lock );
 720     vlc_cond_signal( &p_this->object_wait );
 721     vlc_mutex_unlock( &p_this->object_lock );
 722 }
 723
 724 /*****************************************************************************
 725  * vlc_thread_join: wait until a thread exits, inner version
 726  *****************************************************************************/
 727 void __vlc_thread_join( vlc_object_t *p_this, const char * psz_file, int i_line )
 728 {
 729     int i_ret = 0;
 730
 731 #if defined( PTH_INIT_IN_PTH_H )
 732     i_ret = ( pth_join( p_this->thread_id, NULL ) == FALSE );
 733
 734 #elif defined( ST_INIT_IN_ST_H )
 735     i_ret = st_thread_join( p_this->thread_id, NULL );
 736
 737 #elif defined( UNDER_CE ) || defined( WIN32 )
 738     HMODULE hmodule;
 739     BOOL (WINAPI *OurGetThreadTimes)( HANDLE, FILETIME*, FILETIME*,
 740                                       FILETIME*, FILETIME* );
 741     FILETIME create_ft, exit_ft, kernel_ft, user_ft;
 742     int64_t real_time, kernel_time, user_time;
 743
 744     WaitForSingleObject( p_this->thread_id, INFINITE );
 745
 746 #if defined( UNDER_CE )
 747     hmodule = GetModuleHandle( _T("COREDLL") );
 748 #else
 749     hmodule = GetModuleHandle( _T("KERNEL32") );
 750 #endif
 751     OurGetThreadTimes = (BOOL (WINAPI*)( HANDLE, FILETIME*, FILETIME*,
 752                                          FILETIME*, FILETIME* ))
 753         GetProcAddress( hmodule, _T("GetThreadTimes") );
 754
 755     if( OurGetThreadTimes &&
 756         OurGetThreadTimes( p_this->thread_id,
 757                            &create_ft, &exit_ft, &kernel_ft, &user_ft ) )
 758     {
 759         real_time =
 760           ((((int64_t)exit_ft.dwHighDateTime)<<32)| exit_ft.dwLowDateTime) -
 761           ((((int64_t)create_ft.dwHighDateTime)<<32)| create_ft.dwLowDateTime);
 762         real_time /= 10;
 763
 764         kernel_time =
 765           ((((int64_t)kernel_ft.dwHighDateTime)<<32)|
 766            kernel_ft.dwLowDateTime) / 10;
 767
 768         user_time =
 769           ((((int64_t)user_ft.dwHighDateTime)<<32)|
 770            user_ft.dwLowDateTime) / 10;
 771
 772         msg_Dbg( p_this, "thread times: "
 773                  "real "I64Fd"m%fs, kernel "I64Fd"m%fs, user "I64Fd"m%fs",
 774                  real_time/60/1000000,
 775                  (double)((real_time%(60*1000000))/1000000.0),
 776                  kernel_time/60/1000000,
 777                  (double)((kernel_time%(60*1000000))/1000000.0),
 778                  user_time/60/1000000,
 779                  (double)((user_time%(60*1000000))/1000000.0) );
 780     }
 781     CloseHandle( p_this->thread_id );
 782
 783 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 784     int32_t exit_value;
 785     wait_for_thread( p_this->thread_id, &exit_value );
 786
 787 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 788     i_ret = pthread_join( p_this->thread_id, NULL );
 789
 790 #elif defined( HAVE_CTHREADS_H )
 791     cthread_join( p_this->thread_id );
 792     i_ret = 1;
 793
 794 #endif
 795
 796     if( i_ret )
 797     {
 798         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%s)",
 799                          (unsigned int)p_this->thread_id, psz_file, i_line,
 800                          strerror(i_ret) );
 801     }
 802     else
 803     {
 804         msg_Dbg( p_this, "thread %u joined (%s:%d)",
 805                          (unsigned int)p_this->thread_id, psz_file, i_line );
 806     }
 807
 808     p_this->b_thread = 0;
 809 }
 810