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 /*****************************************************************************
  53  * vlc_threads_init: initialize threads system
  54  *****************************************************************************
  55  * This function requires lazy initialization of a global lock in order to
  56  * keep the library really thread-safe. Some architectures don't support this
  57  * and thus do not guarantee the complete reentrancy.
  58  *****************************************************************************/
  59 int __vlc_threads_init( vlc_object_t *p_this )
  60 {
  61     libvlc_global_data_t *p_libvlc_global = (libvlc_global_data_t *)p_this;
  62     int i_ret = VLC_SUCCESS;
  63
  64     /* If we have lazy mutex initialization, use it. Otherwise, we just
  65      * hope nothing wrong happens. */
  66 #if defined( PTH_INIT_IN_PTH_H )
  67 #elif defined( ST_INIT_IN_ST_H )
  68 #elif defined( UNDER_CE )
  69 #elif defined( WIN32 )
  70 #elif defined( HAVE_KERNEL_SCHEDULER_H )
  71 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
  72     pthread_mutex_lock( &once_mutex );
  73 #elif defined( HAVE_CTHREADS_H )
  74 #endif
  75
  76     if( i_status == VLC_THREADS_UNINITIALIZED )
  77     {
  78         i_status = VLC_THREADS_PENDING;
  79
  80         /* We should be safe now. Do all the initialization stuff we want. */
  81         p_libvlc_global->b_ready = VLC_FALSE;
  82
  83 #if defined( PTH_INIT_IN_PTH_H )
  84         i_ret = ( pth_init() == FALSE );
  85
  86 #elif defined( ST_INIT_IN_ST_H )
  87         i_ret = st_init();
  88
  89 #elif defined( UNDER_CE )
  90         /* Nothing to initialize */
  91
  92 #elif defined( WIN32 )
  93         /* Dynamically get the address of SignalObjectAndWait */
  94         if( GetVersion() < 0x80000000 )
  95         {
  96             HINSTANCE hInstLib;
  97
  98             /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
  99             hInstLib = LoadLibrary( "kernel32" );
 100             if( hInstLib )
 101             {
 102                 p_libvlc_global->SignalObjectAndWait =
 103                     (SIGNALOBJECTANDWAIT)GetProcAddress( hInstLib,
 104                                                      "SignalObjectAndWait" );
 105             }
 106         }
 107         else
 108         {
 109             p_libvlc_global->SignalObjectAndWait = NULL;
 110         }
 111
 112         p_libvlc_global->b_fast_mutex = 0;
 113         p_libvlc_global->i_win9x_cv = 0;
 114
 115 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 116 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 117 #elif defined( HAVE_CTHREADS_H )
 118 #endif
 119
 120         p_root = vlc_object_create( p_libvlc_global, VLC_OBJECT_GLOBAL );
 121         if( p_root == NULL )
 122             i_ret = VLC_ENOMEM;
 123
 124         if( i_ret )
 125         {
 126             i_status = VLC_THREADS_ERROR;
 127         }
 128         else
 129         {
 130             i_initializations++;
 131             i_status = VLC_THREADS_READY;
 132         }
 133     }
 134     else
 135     {
 136         /* Just increment the initialization count */
 137         i_initializations++;
 138     }
 139
 140     /* If we have lazy mutex initialization support, unlock the mutex;
 141      * otherwize, do a naive wait loop. */
 142 #if defined( PTH_INIT_IN_PTH_H )
 143     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 144 #elif defined( ST_INIT_IN_ST_H )
 145     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 146 #elif defined( UNDER_CE )
 147     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 148 #elif defined( WIN32 )
 149     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 150 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 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 #endif
 157
 158     if( i_status != VLC_THREADS_READY )
 159     {
 160         return VLC_ETHREAD;
 161     }
 162
 163     return i_ret;
 164 }
 165
 166 /*****************************************************************************
 167  * vlc_threads_end: stop threads system
 168  *****************************************************************************
 169  * FIXME: This function is far from being threadsafe.
 170  *****************************************************************************/
 171 int __vlc_threads_end( vlc_object_t *p_this )
 172 {
 173 #if defined( PTH_INIT_IN_PTH_H )
 174 #elif defined( ST_INIT_IN_ST_H )
 175 #elif defined( UNDER_CE )
 176 #elif defined( WIN32 )
 177 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 178 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 179     pthread_mutex_lock( &once_mutex );
 180 #elif defined( HAVE_CTHREADS_H )
 181 #endif
 182
 183     if( i_initializations == 0 )
 184         return VLC_EGENERIC;
 185
 186     i_initializations--;
 187     if( i_initializations == 0 )
 188     {
 189         i_status = VLC_THREADS_UNINITIALIZED;
 190         vlc_object_destroy( p_root );
 191     }
 192
 193 #if defined( PTH_INIT_IN_PTH_H )
 194     if( i_initializations == 0 )
 195     {
 196         return ( pth_kill() == FALSE );
 197     }
 198
 199 #elif defined( ST_INIT_IN_ST_H )
 200 #elif defined( UNDER_CE )
 201 #elif defined( WIN32 )
 202 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 203 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 204     pthread_mutex_unlock( &once_mutex );
 205 #elif defined( HAVE_CTHREADS_H )
 206 #endif
 207     return VLC_SUCCESS;
 208 }
 209
 210 /*****************************************************************************
 211  * vlc_mutex_init: initialize a mutex
 212  *****************************************************************************/
 213 int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 214 {
 215     p_mutex->p_this = p_this;
 216
 217 #if defined( PTH_INIT_IN_PTH_H )
 218     return ( pth_mutex_init( &p_mutex->mutex ) == FALSE );
 219
 220 #elif defined( ST_INIT_IN_ST_H )
 221     p_mutex->mutex = st_mutex_new();
 222     return ( p_mutex->mutex == NULL ) ? errno : 0;
 223
 224 #elif defined( UNDER_CE )
 225     InitializeCriticalSection( &p_mutex->csection );
 226     return 0;
 227
 228 #elif defined( WIN32 )
 229     /* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
 230      * function and have a 100% correct vlc_cond_wait() implementation.
 231      * As this function is not available on Win9x, we can use the faster
 232      * CriticalSections */
 233     if( p_this->p_libvlc_global->SignalObjectAndWait &&
 234         !p_this->p_libvlc_global->b_fast_mutex )
 235     {
 236         /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 237         p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
 238         return ( p_mutex->mutex != NULL ? 0 : 1 );
 239     }
 240     else
 241     {
 242         p_mutex->mutex = NULL;
 243         InitializeCriticalSection( &p_mutex->csection );
 244         return 0;
 245     }
 246
 247 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 248     /* check the arguments and whether it's already been initialized */
 249     if( p_mutex == NULL )
 250     {
 251         return B_BAD_VALUE;
 252     }
 253
 254     if( p_mutex->init == 9999 )
 255     {
 256         return EALREADY;
 257     }
 258
 259     p_mutex->lock = create_sem( 1, "BeMutex" );
 260     if( p_mutex->lock < B_NO_ERROR )
 261     {
 262         return( -1 );
 263     }
 264
 265     p_mutex->init = 9999;
 266     return B_OK;
 267
 268 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 269 #   if defined(DEBUG) && defined(SYS_LINUX)
 270     {
 271         /* Create error-checking mutex to detect problems more easily. */
 272         pthread_mutexattr_t attr;
 273         int                 i_result;
 274
 275         pthread_mutexattr_init( &attr );
 276         pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 277         i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 278         pthread_mutexattr_destroy( &attr );
 279         return( i_result );
 280     }
 281 #   endif
 282     return pthread_mutex_init( &p_mutex->mutex, NULL );
 283
 284 #elif defined( HAVE_CTHREADS_H )
 285     mutex_init( p_mutex );
 286     return 0;
 287
 288 #endif
 289 }
 290
 291 /*****************************************************************************
 292  * vlc_mutex_destroy: destroy a mutex, inner version
 293  *****************************************************************************/
 294 int __vlc_mutex_destroy( const char * psz_file, int i_line, vlc_mutex_t *p_mutex )
 295 {
 296     int i_result;
 297     /* In case of error : */
 298     int i_thread = -1;
 299     const char * psz_error = "";
 300
 301 #if defined( PTH_INIT_IN_PTH_H )
 302     return 0;
 303
 304 #elif defined( ST_INIT_IN_ST_H )
 305     i_result = st_mutex_destroy( p_mutex->mutex );
 306
 307 #elif defined( UNDER_CE )
 308     DeleteCriticalSection( &p_mutex->csection );
 309     return 0;
 310
 311 #elif defined( WIN32 )
 312     if( p_mutex->mutex )
 313     {
 314         CloseHandle( p_mutex->mutex );
 315     }
 316     else
 317     {
 318         DeleteCriticalSection( &p_mutex->csection );
 319     }
 320     return 0;
 321
 322 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 323     if( p_mutex->init == 9999 )
 324     {
 325         delete_sem( p_mutex->lock );
 326     }
 327
 328     p_mutex->init = 0;
 329     return B_OK;
 330
 331 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 332     i_result = pthread_mutex_destroy( &p_mutex->mutex );
 333     if( i_result )
 334     {
 335         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 336         psz_error = strerror(i_result);
 337     }
 338
 339 #elif defined( HAVE_CTHREADS_H )
 340     return 0;
 341
 342 #endif
 343
 344     if( i_result )
 345     {
 346         msg_Err( p_mutex->p_this,
 347                  "thread %d: mutex_destroy failed at %s:%d (%d:%s)",
 348                  i_thread, psz_file, i_line, i_result, psz_error );
 349     }
 350     return i_result;
 351 }
 352
 353 /*****************************************************************************
 354  * vlc_cond_init: initialize a condition
 355  *****************************************************************************/
 356 int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar )
 357 {
 358     p_condvar->p_this = p_this;
 359
 360 #if defined( PTH_INIT_IN_PTH_H )
 361     return ( pth_cond_init( &p_condvar->cond ) == FALSE );
 362
 363 #elif defined( ST_INIT_IN_ST_H )
 364     p_condvar->cond = st_cond_new();
 365     return ( p_condvar->cond == NULL ) ? errno : 0;
 366
 367 #elif defined( UNDER_CE )
 368     /* Initialize counter */
 369     p_condvar->i_waiting_threads = 0;
 370
 371     /* Create an auto-reset event. */
 372     p_condvar->event = CreateEvent( NULL,   /* no security */
 373                                     FALSE,  /* auto-reset event */
 374                                     FALSE,  /* start non-signaled */
 375                                     NULL ); /* unnamed */
 376     return !p_condvar->event;
 377
 378 #elif defined( WIN32 )
 379     /* Initialize counter */
 380     p_condvar->i_waiting_threads = 0;
 381
 382     /* Misc init */
 383     p_condvar->i_win9x_cv = p_this->p_libvlc_global->i_win9x_cv;
 384     p_condvar->SignalObjectAndWait = p_this->p_libvlc_global->SignalObjectAndWait;
 385
 386     if( (p_condvar->SignalObjectAndWait &&
 387         !p_this->p_libvlc_global->b_fast_mutex)
 388         || p_condvar->i_win9x_cv == 0 )
 389     {
 390         /* Create an auto-reset event. */
 391         p_condvar->event = CreateEvent( NULL,   /* no security */
 392                                         FALSE,  /* auto-reset event */
 393                                         FALSE,  /* start non-signaled */
 394                                         NULL ); /* unnamed */
 395
 396         p_condvar->semaphore = NULL;
 397         return !p_condvar->event;
 398     }
 399     else
 400     {
 401         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
 402                                                 0,          /* initial count */
 403                                                 0x7fffffff, /* max count */
 404                                                 NULL );     /* unnamed */
 405
 406         if( p_condvar->i_win9x_cv == 1 )
 407             /* Create a manual-reset event initially signaled. */
 408             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
 409         else
 410             /* Create a auto-reset event. */
 411             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
 412
 413         InitializeCriticalSection( &p_condvar->csection );
 414
 415         return !p_condvar->semaphore || !p_condvar->event;
 416     }
 417
 418 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 419     if( !p_condvar )
 420     {
 421         return B_BAD_VALUE;
 422     }
 423
 424     if( p_condvar->init == 9999 )
 425     {
 426         return EALREADY;
 427     }
 428
 429     p_condvar->thread = -1;
 430     p_condvar->init = 9999;
 431     return 0;
 432
 433 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 434     return pthread_cond_init( &p_condvar->cond, NULL );
 435
 436 #elif defined( HAVE_CTHREADS_H )
 437     /* condition_init() */
 438     spin_lock_init( &p_condvar->lock );
 439     cthread_queue_init( &p_condvar->queue );
 440     p_condvar->name = 0;
 441     p_condvar->implications = 0;
 442
 443     return 0;
 444
 445 #endif
 446 }
 447
 448 /*****************************************************************************
 449  * vlc_cond_destroy: destroy a condition, inner version
 450  *****************************************************************************/
 451 int __vlc_cond_destroy( const char * psz_file, int i_line, vlc_cond_t *p_condvar )
 452 {
 453     int i_result;
 454     /* In case of error : */
 455     int i_thread = -1;
 456     const char * psz_error = "";
 457
 458 #if defined( PTH_INIT_IN_PTH_H )
 459     return 0;
 460
 461 #elif defined( ST_INIT_IN_ST_H )
 462     i_result = st_cond_destroy( p_condvar->cond );
 463
 464 #elif defined( UNDER_CE )
 465     i_result = !CloseHandle( p_condvar->event );
 466
 467 #elif defined( WIN32 )
 468     if( !p_condvar->semaphore )
 469         i_result = !CloseHandle( p_condvar->event );
 470     else
 471         i_result = !CloseHandle( p_condvar->event )
 472           || !CloseHandle( p_condvar->semaphore );
 473
 474     if( p_condvar->semaphore != NULL )
 475                 DeleteCriticalSection( &p_condvar->csection );
 476
 477 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 478     p_condvar->init = 0;
 479     return 0;
 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 = CAST_PTHREAD_TO_INT(pthread_self());
 486         psz_error = strerror(i_result);
 487     }
 488
 489 #elif defined( HAVE_CTHREADS_H )
 490     return 0;
 491
 492 #endif
 493
 494     if( i_result )
 495     {
 496         msg_Err( p_condvar->p_this,
 497                  "thread %d: cond_destroy failed at %s:%d (%d:%s)",
 498                  i_thread, psz_file, i_line, i_result, psz_error );
 499     }
 500     return i_result;
 501 }
 502
 503 /*****************************************************************************
 504  * vlc_tls_create: create a thread-local variable
 505  *****************************************************************************/
 506 int __vlc_threadvar_create( vlc_object_t *p_this, vlc_threadvar_t *p_tls )
 507 {
 508 #if defined( PTH_INIT_IN_PTH_H )
 509     return pth_key_create( &p_tls->handle, NULL );
 510 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 511     msg_Err( p_this, "TLS not implemented" );
 512     return VLC_EGENERIC;
 513 #elif defined( ST_INIT_IN_ST_H )
 514     return st_key_create( &p_tls->handle, NULL );
 515 #elif defined( UNDER_CE ) || defined( WIN32 )
 516 #elif defined( WIN32 )
 517     p_tls->handle = TlsAlloc();
 518     if( p_tls->handle == 0xFFFFFFFF )
 519     {
 520         return VLC_EGENERIC;
 521     }
 522
 523     msg_Err( p_this, "TLS not implemented" );
 524     return VLC_EGENERIC;
 525
 526 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 527     return pthread_key_create( &p_tls->handle, NULL );
 528
 529 #elif defined( HAVE_CTHREADS_H )
 530     return cthread_keycreate( &p_tls-handle );
 531 #endif
 532 }
 533
 534 /*****************************************************************************
 535  * vlc_thread_create: create a thread, inner version
 536  *****************************************************************************
 537  * Note that i_priority is only taken into account on platforms supporting
 538  * userland real-time priority threads.
 539  *****************************************************************************/
 540 int __vlc_thread_create( vlc_object_t *p_this, const char * psz_file, int i_line,
 541                          const char *psz_name, void * ( *func ) ( void * ),
 542                          int i_priority, vlc_bool_t b_wait )
 543 {
 544     int i_ret;
 545     void *p_data = (void *)p_this;
 546
 547     vlc_mutex_lock( &p_this->object_lock );
 548
 549 #if defined( PTH_INIT_IN_PTH_H )
 550     p_this->thread_id = pth_spawn( PTH_ATTR_DEFAULT, func, p_data );
 551     i_ret = p_this->thread_id == NULL;
 552
 553 #elif defined( ST_INIT_IN_ST_H )
 554     p_this->thread_id = st_thread_create( func, p_data, 1, 0 );
 555     i_ret = 0;
 556
 557 #elif defined( WIN32 ) || defined( UNDER_CE )
 558     {
 559         unsigned threadID;
 560         /* When using the MSVCRT C library you have to use the _beginthreadex
 561          * function instead of CreateThread, otherwise you'll end up with
 562          * memory leaks and the signal functions not working (see Microsoft
 563          * Knowledge Base, article 104641) */
 564         p_this->thread_id =
 565 #if defined( UNDER_CE )
 566                 (HANDLE)CreateThread( NULL, 0, (PTHREAD_START) func,
 567                                       p_data, 0, &threadID );
 568 #else
 569                 (HANDLE)_beginthreadex( NULL, 0, (PTHREAD_START) func,
 570                                         p_data, 0, &threadID );
 571 #endif
 572     }
 573
 574     if( p_this->thread_id && i_priority )
 575     {
 576         if( !SetThreadPriority(p_this->thread_id, i_priority) )
 577         {
 578             msg_Warn( p_this, "couldn't set a faster priority" );
 579             i_priority = 0;
 580         }
 581     }
 582
 583     i_ret = ( p_this->thread_id ? 0 : 1 );
 584
 585 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 586     p_this->thread_id = spawn_thread( (thread_func)func, psz_name,
 587                                       i_priority, p_data );
 588     i_ret = resume_thread( p_this->thread_id );
 589
 590 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 591     i_ret = pthread_create( &p_this->thread_id, NULL, func, p_data );
 592
 593 #ifndef __APPLE__
 594     if( config_GetInt( p_this, "rt-priority" ) )
 595 #endif
 596     {
 597         int i_error, i_policy;
 598         struct sched_param param;
 599
 600         memset( &param, 0, sizeof(struct sched_param) );
 601         if( config_GetType( p_this, "rt-offset" ) )
 602         {
 603             i_priority += config_GetInt( p_this, "rt-offset" );
 604         }
 605         if( i_priority <= 0 )
 606         {
 607             param.sched_priority = (-1) * i_priority;
 608             i_policy = SCHED_OTHER;
 609         }
 610         else
 611         {
 612             param.sched_priority = i_priority;
 613             i_policy = SCHED_RR;
 614         }
 615         if( (i_error = pthread_setschedparam( p_this->thread_id,
 616                                                i_policy, &param )) )
 617         {
 618             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s",
 619                       psz_file, i_line, strerror(i_error) );
 620             i_priority = 0;
 621         }
 622     }
 623 #ifndef __APPLE__
 624     else
 625     {
 626         i_priority = 0;
 627     }
 628 #endif
 629
 630 #elif defined( HAVE_CTHREADS_H )
 631     p_this->thread_id = cthread_fork( (cthread_fn_t)func, (any_t)p_data );
 632     i_ret = 0;
 633
 634 #endif
 635
 636     if( i_ret == 0 )
 637     {
 638         if( b_wait )
 639         {
 640             msg_Dbg( p_this, "waiting for thread completion" );
 641             vlc_cond_wait( &p_this->object_wait, &p_this->object_lock );
 642         }
 643
 644         p_this->b_thread = 1;
 645
 646         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 647                  (unsigned int)p_this->thread_id, psz_name, i_priority,
 648                  psz_file, i_line );
 649
 650         vlc_mutex_unlock( &p_this->object_lock );
 651     }
 652     else
 653     {
 654         msg_Err( p_this, "%s thread could not be created at %s:%d (%s)",
 655                          psz_name, psz_file, i_line, strerror(i_ret) );
 656         vlc_mutex_unlock( &p_this->object_lock );
 657     }
 658
 659     return i_ret;
 660 }
 661
 662 /*****************************************************************************
 663  * vlc_thread_set_priority: set the priority of the current thread when we
 664  * couldn't set it in vlc_thread_create (for instance for the main thread)
 665  *****************************************************************************/
 666 int __vlc_thread_set_priority( vlc_object_t *p_this, const char * psz_file,
 667                                int i_line, int i_priority )
 668 {
 669 #if defined( PTH_INIT_IN_PTH_H ) || defined( ST_INIT_IN_ST_H )
 670 #elif defined( WIN32 ) || defined( UNDER_CE )
 671     if( !SetThreadPriority(GetCurrentThread(), i_priority) )
 672     {
 673         msg_Warn( p_this, "couldn't set a faster priority" );
 674         return 1;
 675     }
 676
 677 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 678 #ifndef __APPLE__
 679     if( config_GetInt( p_this, "rt-priority" ) )
 680 #endif
 681     {
 682         int i_error, i_policy;
 683         struct sched_param param;
 684
 685         memset( &param, 0, sizeof(struct sched_param) );
 686         if( config_GetType( p_this, "rt-offset" ) )
 687         {
 688             i_priority += config_GetInt( p_this, "rt-offset" );
 689         }
 690         if( i_priority <= 0 )
 691         {
 692             param.sched_priority = (-1) * i_priority;
 693             i_policy = SCHED_OTHER;
 694         }
 695         else
 696         {
 697             param.sched_priority = i_priority;
 698             i_policy = SCHED_RR;
 699         }
 700         if( !p_this->thread_id )
 701             p_this->thread_id = pthread_self();
 702         if( (i_error = pthread_setschedparam( p_this->thread_id,
 703                                                i_policy, &param )) )
 704         {
 705             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s",
 706                       psz_file, i_line, strerror(i_error) );
 707             i_priority = 0;
 708         }
 709     }
 710 #endif
 711
 712     return 0;
 713 }
 714
 715 /*****************************************************************************
 716  * vlc_thread_ready: tell the parent thread we were successfully spawned
 717  *****************************************************************************/
 718 void __vlc_thread_ready( vlc_object_t *p_this )
 719 {
 720     vlc_mutex_lock( &p_this->object_lock );
 721     vlc_cond_signal( &p_this->object_wait );
 722     vlc_mutex_unlock( &p_this->object_lock );
 723 }
 724
 725 /*****************************************************************************
 726  * vlc_thread_join: wait until a thread exits, inner version
 727  *****************************************************************************/
 728 void __vlc_thread_join( vlc_object_t *p_this, const char * psz_file, int i_line )
 729 {
 730     int i_ret = 0;
 731
 732 #if defined( PTH_INIT_IN_PTH_H )
 733     i_ret = ( pth_join( p_this->thread_id, NULL ) == FALSE );
 734
 735 #elif defined( ST_INIT_IN_ST_H )
 736     i_ret = st_thread_join( p_this->thread_id, NULL );
 737
 738 #elif defined( UNDER_CE ) || defined( WIN32 )
 739     HMODULE hmodule;
 740     BOOL (WINAPI *OurGetThreadTimes)( HANDLE, FILETIME*, FILETIME*,
 741                                       FILETIME*, FILETIME* );
 742     FILETIME create_ft, exit_ft, kernel_ft, user_ft;
 743     int64_t real_time, kernel_time, user_time;
 744
 745     WaitForSingleObject( p_this->thread_id, INFINITE );
 746
 747 #if defined( UNDER_CE )
 748     hmodule = GetModuleHandle( _T("COREDLL") );
 749 #else
 750     hmodule = GetModuleHandle( _T("KERNEL32") );
 751 #endif
 752     OurGetThreadTimes = (BOOL (WINAPI*)( HANDLE, FILETIME*, FILETIME*,
 753                                          FILETIME*, FILETIME* ))
 754         GetProcAddress( hmodule, _T("GetThreadTimes") );
 755
 756     if( OurGetThreadTimes &&
 757         OurGetThreadTimes( p_this->thread_id,
 758                            &create_ft, &exit_ft, &kernel_ft, &user_ft ) )
 759     {
 760         real_time =
 761           ((((int64_t)exit_ft.dwHighDateTime)<<32)| exit_ft.dwLowDateTime) -
 762           ((((int64_t)create_ft.dwHighDateTime)<<32)| create_ft.dwLowDateTime);
 763         real_time /= 10;
 764
 765         kernel_time =
 766           ((((int64_t)kernel_ft.dwHighDateTime)<<32)|
 767            kernel_ft.dwLowDateTime) / 10;
 768
 769         user_time =
 770           ((((int64_t)user_ft.dwHighDateTime)<<32)|
 771            user_ft.dwLowDateTime) / 10;
 772
 773         msg_Dbg( p_this, "thread times: "
 774                  "real "I64Fd"m%fs, kernel "I64Fd"m%fs, user "I64Fd"m%fs",
 775                  real_time/60/1000000,
 776                  (double)((real_time%(60*1000000))/1000000.0),
 777                  kernel_time/60/1000000,
 778                  (double)((kernel_time%(60*1000000))/1000000.0),
 779                  user_time/60/1000000,
 780                  (double)((user_time%(60*1000000))/1000000.0) );
 781     }
 782     CloseHandle( p_this->thread_id );
 783
 784 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 785     int32_t exit_value;
 786     wait_for_thread( p_this->thread_id, &exit_value );
 787
 788 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 789     i_ret = pthread_join( p_this->thread_id, NULL );
 790
 791 #elif defined( HAVE_CTHREADS_H )
 792     cthread_join( p_this->thread_id );
 793     i_ret = 1;
 794
 795 #endif
 796
 797     if( i_ret )
 798     {
 799         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%s)",
 800                          (unsigned int)p_this->thread_id, psz_file, i_line,
 801                          strerror(i_ret) );
 802     }
 803     else
 804     {
 805         msg_Dbg( p_this, "thread %u joined (%s:%d)",
 806                          (unsigned int)p_this->thread_id, psz_file, i_line );
 807     }
 808
 809     p_this->b_thread = 0;
 810 }
 811