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

   1 /*****************************************************************************
   2  * threads.c : threads implementation for the VideoLAN client
   3  *****************************************************************************
   4  * Copyright (C) 1999-2007 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  *          Clément Sténac
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  25  *****************************************************************************/
  26
  27 #include <vlc/vlc.h>
  28
  29 #include <stdlib.h>
  30 #include "libvlc.h"
  31
  32 #define VLC_THREADS_UNINITIALIZED  0
  33 #define VLC_THREADS_PENDING        1
  34 #define VLC_THREADS_ERROR          2
  35 #define VLC_THREADS_READY          3
  36
  37 /*****************************************************************************
  38  * Global mutex for lazy initialization of the threads system
  39  *****************************************************************************/
  40 static volatile unsigned i_initializations = 0;
  41 static volatile int i_status = VLC_THREADS_UNINITIALIZED;
  42 static vlc_object_t *p_root;
  43
  44 #if defined( PTH_INIT_IN_PTH_H )
  45 #elif defined( ST_INIT_IN_ST_H )
  46 #elif defined( UNDER_CE )
  47 #elif defined( WIN32 )
  48 static SIGNALOBJECTANDWAIT pf_SignalObjectAndWait = NULL;
  49 static vlc_bool_t          b_fast_mutex = 0;
  50 static int                 i_win9x_cv = 0;
  51 #elif defined( HAVE_KERNEL_SCHEDULER_H )
  52 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
  53 static pthread_mutex_t once_mutex = PTHREAD_MUTEX_INITIALIZER;
  54 #elif defined( HAVE_CTHREADS_H )
  55 #endif
  56
  57 vlc_threadvar_t msg_context_global_key;
  58
  59 /*****************************************************************************
  60  * vlc_threads_init: initialize threads system
  61  *****************************************************************************
  62  * This function requires lazy initialization of a global lock in order to
  63  * keep the library really thread-safe. Some architectures don't support this
  64  * and thus do not guarantee the complete reentrancy.
  65  *****************************************************************************/
  66 int __vlc_threads_init( vlc_object_t *p_this )
  67 {
  68     libvlc_global_data_t *p_libvlc_global = (libvlc_global_data_t *)p_this;
  69     int i_ret = VLC_SUCCESS;
  70
  71     /* If we have lazy mutex initialization, use it. Otherwise, we just
  72      * hope nothing wrong happens. */
  73 #if defined( PTH_INIT_IN_PTH_H )
  74 #elif defined( ST_INIT_IN_ST_H )
  75 #elif defined( UNDER_CE )
  76 #elif defined( WIN32 )
  77     b_fast_mutex = config_GetInt( p_this, "fast-mutex" );
  78     i_win9x_cv = config_GetInt( p_this, "win9x-cv-method" );
  79 #elif defined( HAVE_KERNEL_SCHEDULER_H )
  80 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
  81     pthread_mutex_lock( &once_mutex );
  82 #elif defined( HAVE_CTHREADS_H )
  83 #endif
  84
  85     if( i_status == VLC_THREADS_UNINITIALIZED )
  86     {
  87         i_status = VLC_THREADS_PENDING;
  88
  89         /* We should be safe now. Do all the initialization stuff we want. */
  90         p_libvlc_global->b_ready = VLC_FALSE;
  91
  92 #if defined( PTH_INIT_IN_PTH_H )
  93         i_ret = ( pth_init() == FALSE );
  94
  95 #elif defined( ST_INIT_IN_ST_H )
  96         i_ret = st_init();
  97
  98 #elif defined( UNDER_CE )
  99         /* Nothing to initialize */
 100
 101 #elif defined( WIN32 )
 102         /* Dynamically get the address of SignalObjectAndWait */
 103         if( GetVersion() < 0x80000000 )
 104         {
 105             HINSTANCE hInstLib;
 106
 107             /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 108             hInstLib = LoadLibrary( "kernel32" );
 109             if( hInstLib )
 110             {
 111                 pf_SignalObjectAndWait =
 112                     (SIGNALOBJECTANDWAIT)GetProcAddress( hInstLib,
 113                                                      "SignalObjectAndWait" );
 114             }
 115         }
 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     (void)p_this;
 178 #if defined( PTH_INIT_IN_PTH_H )
 179 #elif defined( ST_INIT_IN_ST_H )
 180 #elif defined( UNDER_CE )
 181 #elif defined( WIN32 )
 182 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 183 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 184     pthread_mutex_lock( &once_mutex );
 185 #elif defined( HAVE_CTHREADS_H )
 186 #endif
 187
 188     if( i_initializations == 0 )
 189         return VLC_EGENERIC;
 190
 191     i_initializations--;
 192     if( i_initializations == 0 )
 193     {
 194         i_status = VLC_THREADS_UNINITIALIZED;
 195         vlc_object_destroy( p_root );
 196     }
 197
 198 #if defined( PTH_INIT_IN_PTH_H )
 199     if( i_initializations == 0 )
 200     {
 201         return ( pth_kill() == FALSE );
 202     }
 203
 204 #elif defined( ST_INIT_IN_ST_H )
 205 #elif defined( UNDER_CE )
 206 #elif defined( WIN32 )
 207 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 208 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 209     pthread_mutex_unlock( &once_mutex );
 210 #elif defined( HAVE_CTHREADS_H )
 211 #endif
 212     return VLC_SUCCESS;
 213 }
 214
 215 /*****************************************************************************
 216  * vlc_mutex_init: initialize a mutex
 217  *****************************************************************************/
 218 int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 219 {
 220     p_mutex->p_this = p_this;
 221
 222 #if defined( PTH_INIT_IN_PTH_H )
 223     return ( pth_mutex_init( &p_mutex->mutex ) == FALSE );
 224
 225 #elif defined( ST_INIT_IN_ST_H )
 226     p_mutex->mutex = st_mutex_new();
 227     return ( p_mutex->mutex == NULL ) ? errno : 0;
 228
 229 #elif defined( UNDER_CE )
 230     InitializeCriticalSection( &p_mutex->csection );
 231     return 0;
 232
 233 #elif defined( WIN32 )
 234     /* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
 235      * function and have a 100% correct vlc_cond_wait() implementation.
 236      * As this function is not available on Win9x, we can use the faster
 237      * CriticalSections */
 238     if( pf_SignalObjectAndWait && !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 = i_win9x_cv;
 388     p_condvar->SignalObjectAndWait = pf_SignalObjectAndWait;
 389
 390     if( (p_condvar->SignalObjectAndWait && !b_fast_mutex)
 391         || p_condvar->i_win9x_cv == 0 )
 392     {
 393         /* Create an auto-reset event. */
 394         p_condvar->event = CreateEvent( NULL,   /* no security */
 395                                         FALSE,  /* auto-reset event */
 396                                         FALSE,  /* start non-signaled */
 397                                         NULL ); /* unnamed */
 398
 399         p_condvar->semaphore = NULL;
 400         return !p_condvar->event;
 401     }
 402     else
 403     {
 404         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
 405                                                 0,          /* initial count */
 406                                                 0x7fffffff, /* max count */
 407                                                 NULL );     /* unnamed */
 408
 409         if( p_condvar->i_win9x_cv == 1 )
 410             /* Create a manual-reset event initially signaled. */
 411             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
 412         else
 413             /* Create a auto-reset event. */
 414             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
 415
 416         InitializeCriticalSection( &p_condvar->csection );
 417
 418         return !p_condvar->semaphore || !p_condvar->event;
 419     }
 420
 421 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 422     if( !p_condvar )
 423     {
 424         return B_BAD_VALUE;
 425     }
 426
 427     if( p_condvar->init == 9999 )
 428     {
 429         return EALREADY;
 430     }
 431
 432     p_condvar->thread = -1;
 433     p_condvar->init = 9999;
 434     return 0;
 435
 436 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 437     return pthread_cond_init( &p_condvar->cond, NULL );
 438
 439 #elif defined( HAVE_CTHREADS_H )
 440     /* condition_init() */
 441     spin_lock_init( &p_condvar->lock );
 442     cthread_queue_init( &p_condvar->queue );
 443     p_condvar->name = 0;
 444     p_condvar->implications = 0;
 445
 446     return 0;
 447
 448 #endif
 449 }
 450
 451 /*****************************************************************************
 452  * vlc_cond_destroy: destroy a condition, inner version
 453  *****************************************************************************/
 454 int __vlc_cond_destroy( const char * psz_file, int i_line, vlc_cond_t *p_condvar )
 455 {
 456     int i_result;
 457     /* In case of error : */
 458     int i_thread = -1;
 459     const char * psz_error = "";
 460
 461 #if defined( PTH_INIT_IN_PTH_H )
 462     return 0;
 463
 464 #elif defined( ST_INIT_IN_ST_H )
 465     i_result = st_cond_destroy( p_condvar->cond );
 466
 467 #elif defined( UNDER_CE )
 468     i_result = !CloseHandle( p_condvar->event );
 469
 470 #elif defined( WIN32 )
 471     if( !p_condvar->semaphore )
 472         i_result = !CloseHandle( p_condvar->event );
 473     else
 474         i_result = !CloseHandle( p_condvar->event )
 475           || !CloseHandle( p_condvar->semaphore );
 476
 477     if( p_condvar->semaphore != NULL )
 478                 DeleteCriticalSection( &p_condvar->csection );
 479
 480 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 481     p_condvar->init = 0;
 482     return 0;
 483
 484 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 485     i_result = pthread_cond_destroy( &p_condvar->cond );
 486     if( i_result )
 487     {
 488         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 489         psz_error = strerror(i_result);
 490     }
 491
 492 #elif defined( HAVE_CTHREADS_H )
 493     return 0;
 494
 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_tls_create: create a thread-local variable
 508  *****************************************************************************/
 509 int __vlc_threadvar_create( vlc_object_t *p_this, vlc_threadvar_t *p_tls )
 510 {
 511     int i_ret;
 512     (void)p_this;
 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