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
  31 #define VLC_THREADS_UNINITIALIZED  0
  32 #define VLC_THREADS_PENDING        1
  33 #define VLC_THREADS_ERROR          2
  34 #define VLC_THREADS_READY          3
  35
  36 /*****************************************************************************
  37  * Global mutex for lazy initialization of the threads system
  38  *****************************************************************************/
  39 static volatile unsigned i_initializations = 0;
  40 static volatile int i_status = VLC_THREADS_UNINITIALIZED;
  41 static vlc_object_t *p_root;
  42
  43 #if defined( PTH_INIT_IN_PTH_H )
  44 #elif defined( ST_INIT_IN_ST_H )
  45 #elif defined( UNDER_CE )
  46 #elif defined( WIN32 )
  47 #elif defined( HAVE_KERNEL_SCHEDULER_H )
  48 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
  49     static pthread_mutex_t once_mutex = PTHREAD_MUTEX_INITIALIZER;
  50 #elif defined( HAVE_CTHREADS_H )
  51 #endif
  52
  53 vlc_threadvar_t msg_context_global_key;
  54
  55 /*****************************************************************************
  56  * vlc_threads_init: initialize threads system
  57  *****************************************************************************
  58  * This function requires lazy initialization of a global lock in order to
  59  * keep the library really thread-safe. Some architectures don't support this
  60  * and thus do not guarantee the complete reentrancy.
  61  *****************************************************************************/
  62 int __vlc_threads_init( vlc_object_t *p_this )
  63 {
  64     libvlc_global_data_t *p_libvlc_global = (libvlc_global_data_t *)p_this;
  65     int i_ret = VLC_SUCCESS;
  66
  67     /* If we have lazy mutex initialization, use it. Otherwise, we just
  68      * hope nothing wrong happens. */
  69 #if defined( PTH_INIT_IN_PTH_H )
  70 #elif defined( ST_INIT_IN_ST_H )
  71 #elif defined( UNDER_CE )
  72 #elif defined( WIN32 )
  73 #elif defined( HAVE_KERNEL_SCHEDULER_H )
  74 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
  75     pthread_mutex_lock( &once_mutex );
  76 #elif defined( HAVE_CTHREADS_H )
  77 #endif
  78
  79     if( i_status == VLC_THREADS_UNINITIALIZED )
  80     {
  81         i_status = VLC_THREADS_PENDING;
  82
  83         /* We should be safe now. Do all the initialization stuff we want. */
  84         p_libvlc_global->b_ready = VLC_FALSE;
  85
  86 #if defined( PTH_INIT_IN_PTH_H )
  87         i_ret = ( pth_init() == FALSE );
  88
  89 #elif defined( ST_INIT_IN_ST_H )
  90         i_ret = st_init();
  91
  92 #elif defined( UNDER_CE )
  93         /* Nothing to initialize */
  94
  95 #elif defined( WIN32 )
  96         /* Dynamically get the address of SignalObjectAndWait */
  97         if( GetVersion() < 0x80000000 )
  98         {
  99             HINSTANCE hInstLib;
 100
 101             /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 102             hInstLib = LoadLibrary( "kernel32" );
 103             if( hInstLib )
 104             {
 105                 p_libvlc_global->SignalObjectAndWait =
 106                     (SIGNALOBJECTANDWAIT)GetProcAddress( hInstLib,
 107                                                      "SignalObjectAndWait" );
 108             }
 109         }
 110         else
 111         {
 112             p_libvlc_global->SignalObjectAndWait = NULL;
 113         }
 114
 115         p_libvlc_global->b_fast_mutex = 0;
 116         p_libvlc_global->i_win9x_cv = 0;
 117
 118 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 119 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 120 #elif defined( HAVE_CTHREADS_H )
 121 #endif
 122
 123         p_root = vlc_object_create( p_libvlc_global, VLC_OBJECT_GLOBAL );
 124         if( p_root == NULL )
 125             i_ret = VLC_ENOMEM;
 126
 127         if( i_ret )
 128         {
 129             i_status = VLC_THREADS_ERROR;
 130         }
 131         else
 132         {
 133             i_initializations++;
 134             i_status = VLC_THREADS_READY;
 135         }
 136
 137         vlc_threadvar_create( p_root, &msg_context_global_key );
 138     }
 139     else
 140     {
 141         /* Just increment the initialization count */
 142         i_initializations++;
 143     }
 144
 145     /* If we have lazy mutex initialization support, unlock the mutex;
 146      * otherwize, do a naive wait loop. */
 147 #if defined( PTH_INIT_IN_PTH_H )
 148     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 149 #elif defined( ST_INIT_IN_ST_H )
 150     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 151 #elif defined( UNDER_CE )
 152     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 153 #elif defined( WIN32 )
 154     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 155 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 156     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 157 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 158     pthread_mutex_unlock( &once_mutex );
 159 #elif defined( HAVE_CTHREADS_H )
 160     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 161 #endif
 162
 163     if( i_status != VLC_THREADS_READY )
 164     {
 165         return VLC_ETHREAD;
 166     }
 167
 168     return i_ret;
 169 }
 170
 171 /*****************************************************************************
 172  * vlc_threads_end: stop threads system
 173  *****************************************************************************
 174  * FIXME: This function is far from being threadsafe.
 175  *****************************************************************************/
 176 int __vlc_threads_end( vlc_object_t *p_this )
 177 {
 178     (void)p_this;
 179 #if defined( PTH_INIT_IN_PTH_H )
 180 #elif defined( ST_INIT_IN_ST_H )
 181 #elif defined( UNDER_CE )
 182 #elif defined( WIN32 )
 183 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 184 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 185     pthread_mutex_lock( &once_mutex );
 186 #elif defined( HAVE_CTHREADS_H )
 187 #endif
 188
 189     if( i_initializations == 0 )
 190         return VLC_EGENERIC;
 191
 192     i_initializations--;
 193     if( i_initializations == 0 )
 194     {
 195         i_status = VLC_THREADS_UNINITIALIZED;
 196         vlc_object_destroy( p_root );
 197     }
 198
 199 #if defined( PTH_INIT_IN_PTH_H )
 200     if( i_initializations == 0 )
 201     {
 202         return ( pth_kill() == FALSE );
 203     }
 204
 205 #elif defined( ST_INIT_IN_ST_H )
 206 #elif defined( UNDER_CE )
 207 #elif defined( WIN32 )
 208 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 209 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 210     pthread_mutex_unlock( &once_mutex );
 211 #elif defined( HAVE_CTHREADS_H )
 212 #endif
 213     return VLC_SUCCESS;
 214 }
 215
 216 /*****************************************************************************
 217  * vlc_mutex_init: initialize a mutex
 218  *****************************************************************************/
 219 int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 220 {
 221     p_mutex->p_this = p_this;
 222
 223 #if defined( PTH_INIT_IN_PTH_H )
 224     return ( pth_mutex_init( &p_mutex->mutex ) == FALSE );
 225
 226 #elif defined( ST_INIT_IN_ST_H )
 227     p_mutex->mutex = st_mutex_new();
 228     return ( p_mutex->mutex == NULL ) ? errno : 0;
 229
 230 #elif defined( UNDER_CE )
 231     InitializeCriticalSection( &p_mutex->csection );
 232     return 0;
 233
 234 #elif defined( WIN32 )
 235     /* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
 236      * function and have a 100% correct vlc_cond_wait() implementation.
 237      * As this function is not available on Win9x, we can use the faster
 238      * CriticalSections */
 239     if( p_this->p_libvlc_global->SignalObjectAndWait &&
 240         !p_this->p_libvlc_global->b_fast_mutex )
 241     {
 242         /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 243         p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
 244         return ( p_mutex->mutex != NULL ? 0 : 1 );
 245     }
 246     else
 247     {
 248         p_mutex->mutex = NULL;
 249         InitializeCriticalSection( &p_mutex->csection );
 250         return 0;
 251     }
 252
 253 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 254     /* check the arguments and whether it's already been initialized */
 255     if( p_mutex == NULL )
 256     {
 257         return B_BAD_VALUE;
 258     }
 259
 260     if( p_mutex->init == 9999 )
 261     {
 262         return EALREADY;
 263     }
 264
 265     p_mutex->lock = create_sem( 1, "BeMutex" );
 266     if( p_mutex->lock < B_NO_ERROR )
 267     {
 268         return( -1 );
 269     }
 270
 271     p_mutex->init = 9999;
 272     return B_OK;
 273
 274 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 275 #   if defined(DEBUG) && defined(SYS_LINUX)
 276     {
 277         /* Create error-checking mutex to detect problems more easily. */
 278         pthread_mutexattr_t attr;
 279         int                 i_result;
 280
 281         pthread_mutexattr_init( &attr );
 282         pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 283         i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 284         pthread_mutexattr_destroy( &attr );
 285         return( i_result );
 286     }
 287 #   endif
 288     return pthread_mutex_init( &p_mutex->mutex, NULL );
 289
 290 #elif defined( HAVE_CTHREADS_H )
 291     mutex_init( p_mutex );
 292     return 0;
 293
 294 #endif
 295 }
 296
 297 /*****************************************************************************
 298  * vlc_mutex_destroy: destroy a mutex, inner version
 299  *****************************************************************************/
 300 int __vlc_mutex_destroy( const char * psz_file, int i_line, vlc_mutex_t *p_mutex )
 301 {
 302     int i_result;
 303     /* In case of error : */
 304     int i_thread = -1;
 305     const char * psz_error = "";
 306
 307 #if defined( PTH_INIT_IN_PTH_H )
 308     return 0;
 309
 310 #elif defined( ST_INIT_IN_ST_H )
 311     i_result = st_mutex_destroy( p_mutex->mutex );
 312
 313 #elif defined( UNDER_CE )
 314     DeleteCriticalSection( &p_mutex->csection );
 315     return 0;
 316
 317 #elif defined( WIN32 )
 318     if( p_mutex->mutex )
 319     {
 320         CloseHandle( p_mutex->mutex );
 321     }
 322     else
 323     {
 324         DeleteCriticalSection( &p_mutex->csection );
 325     }
 326     return 0;
 327
 328 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 329     if( p_mutex->init == 9999 )
 330     {
 331         delete_sem( p_mutex->lock );
 332     }
 333
 334     p_mutex->init = 0;
 335     return B_OK;
 336
 337 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 338     i_result = pthread_mutex_destroy( &p_mutex->mutex );
 339     if( i_result )
 340     {
 341         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 342         psz_error = strerror(i_result);
 343     }
 344
 345 #elif defined( HAVE_CTHREADS_H )
 346     return 0;
 347
 348 #endif
 349
 350     if( i_result )
 351     {
 352         msg_Err( p_mutex->p_this,
 353                  "thread %d: mutex_destroy failed at %s:%d (%d:%s)",
 354                  i_thread, psz_file, i_line, i_result, psz_error );
 355     }
 356     return i_result;
 357 }
 358
 359 /*****************************************************************************
 360  * vlc_cond_init: initialize a condition
 361  *****************************************************************************/
 362 int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar )
 363 {
 364     p_condvar->p_this = p_this;
 365
 366 #if defined( PTH_INIT_IN_PTH_H )
 367     return ( pth_cond_init( &p_condvar->cond ) == FALSE );
 368
 369 #elif defined( ST_INIT_IN_ST_H )
 370     p_condvar->cond = st_cond_new();
 371     return ( p_condvar->cond == NULL ) ? errno : 0;
 372
 373 #elif defined( UNDER_CE )
 374     /* Initialize counter */
 375     p_condvar->i_waiting_threads = 0;
 376
 377     /* Create an auto-reset event. */
 378     p_condvar->event = CreateEvent( NULL,   /* no security */
 379                                     FALSE,  /* auto-reset event */
 380                                     FALSE,  /* start non-signaled */
 381                                     NULL ); /* unnamed */
 382     return !p_condvar->event;
 383
 384 #elif defined( WIN32 )
 385     /* Initialize counter */
 386     p_condvar->i_waiting_threads = 0;
 387
 388     /* Misc init */
 389     p_condvar->i_win9x_cv = p_this->p_libvlc_global->i_win9x_cv;
 390     p_condvar->SignalObjectAndWait = p_this->p_libvlc_global->SignalObjectAndWait;
 391
 392     if( (p_condvar->SignalObjectAndWait &&
 393         !p_this->p_libvlc_global->b_fast_mutex)
 394         || p_condvar->i_win9x_cv == 0 )
 395     {
 396         /* Create an auto-reset event. */
 397         p_condvar->event = CreateEvent( NULL,   /* no security */
 398                                         FALSE,  /* auto-reset event */
 399                                         FALSE,  /* start non-signaled */
 400                                         NULL ); /* unnamed */
 401
 402         p_condvar->semaphore = NULL;
 403         return !p_condvar->event;
 404     }
 405     else
 406     {
 407         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
 408                                                 0,          /* initial count */
 409                                                 0x7fffffff, /* max count */
 410                                                 NULL );     /* unnamed */
 411
 412         if( p_condvar->i_win9x_cv == 1 )
 413             /* Create a manual-reset event initially signaled. */
 414             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
 415         else
 416             /* Create a auto-reset event. */
 417             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
 418
 419         InitializeCriticalSection( &p_condvar->csection );
 420
 421         return !p_condvar->semaphore || !p_condvar->event;
 422     }
 423
 424 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 425     if( !p_condvar )
 426     {
 427         return B_BAD_VALUE;
 428     }
 429
 430     if( p_condvar->init == 9999 )
 431     {
 432         return EALREADY;
 433     }
 434
 435     p_condvar->thread = -1;
 436     p_condvar->init = 9999;
 437     return 0;
 438
 439 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 440     return pthread_cond_init( &p_condvar->cond, NULL );
 441
 442 #elif defined( HAVE_CTHREADS_H )
 443     /* condition_init() */
 444     spin_lock_init( &p_condvar->lock );
 445     cthread_queue_init( &p_condvar->queue );
 446     p_condvar->name = 0;
 447     p_condvar->implications = 0;
 448
 449     return 0;
 450
 451 #endif
 452 }
 453
 454 /*****************************************************************************
 455  * vlc_cond_destroy: destroy a condition, inner version
 456  *****************************************************************************/
 457 int __vlc_cond_destroy( const char * psz_file, int i_line, vlc_cond_t *p_condvar )
 458 {
 459     int i_result;
 460     /* In case of error : */
 461     int i_thread = -1;
 462     const char * psz_error = "";
 463
 464 #if defined( PTH_INIT_IN_PTH_H )
 465     return 0;
 466
 467 #elif defined( ST_INIT_IN_ST_H )
 468     i_result = st_cond_destroy( p_condvar->cond );
 469
 470 #elif defined( UNDER_CE )
 471     i_result = !CloseHandle( p_condvar->event );
 472
 473 #elif defined( WIN32 )
 474     if( !p_condvar->semaphore )
 475         i_result = !CloseHandle( p_condvar->event );
 476     else
 477         i_result = !CloseHandle( p_condvar->event )
 478           || !CloseHandle( p_condvar->semaphore );
 479
 480     if( p_condvar->semaphore != NULL )
 481                 DeleteCriticalSection( &p_condvar->csection );
 482
 483 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 484     p_condvar->init = 0;
 485     return 0;
 486
 487 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 488     i_result = pthread_cond_destroy( &p_condvar->cond );
 489     if( i_result )
 490     {
 491         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 492         psz_error = strerror(i_result);
 493     }
 494
 495 #elif defined( HAVE_CTHREADS_H )
 496     return 0;
 497
 498 #endif
 499
 500     if( i_result )
 501     {
 502         msg_Err( p_condvar->p_this,
 503                  "thread %d: cond_destroy failed at %s:%d (%d:%s)",
 504                  i_thread, psz_file, i_line, i_result, psz_error );
 505     }
 506     return i_result;
 507 }
 508
 509 /*****************************************************************************
 510  * vlc_tls_create: create a thread-local variable
 511  *****************************************************************************/
 512 int __vlc_threadvar_create( vlc_object_t *p_this, vlc_threadvar_t *p_tls )
 513 {
 514     int i_ret;
 515     (void)p_this;
 516 #if defined( PTH_INIT_IN_PTH_H )
 517     i_ret = pth_key_create( &p_tls->handle, NULL );
 518 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 519     msg_Err( p_this, "TLS not implemented" );
 520     i_ret VLC_EGENERIC;
 521 #elif defined( ST_INIT_IN_ST_H )
 522     i_ret = st_key_create( &p_tls->handle, NULL );
 523 #elif defined( UNDER_CE ) || defined( WIN32 )
 524 #elif defined( WIN32 )
 525     p_tls->handle = TlsAlloc();
 526     i_ret = !( p_tls->handle == 0xFFFFFFFF );
 527
 528 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 529     i_ret =  pthread_key_create( &p_tls->handle, NULL );
 530 #elif defined( HAVE_CTHREADS_H )
 531     i_ret = cthread_keycreate( &p_tls-handle );
 532 #endif
 533     return i_ret;
 534 }
 535
 536 /*****************************************************************************
 537  * vlc_thread_create: create a thread, inner version
 538  *****************************************************************************
 539  * Note that i_priority is only taken into account on platforms supporting
 540  * userland real-time priority threads.
 541  *****************************************************************************/
 542 int __vlc_thread_create( vlc_object_t *p_this, const char * psz_file, int i_line,
 543                          const char *psz_name, void * ( *func ) ( void * ),
 544                          int i_priority, vlc_bool_t b_wait )
 545 {
 546     int i_ret;
 547     void *p_data = (void *)p_this;
 548
 549     vlc_mutex_lock( &p_this->object_lock );
 550
 551 #if defined( PTH_INIT_IN_PTH_H )
 552     p_this->thread_id = pth_spawn( PTH_ATTR_DEFAULT, func, p_data );
 553     i_ret = p_this->thread_id == NULL;
 554
 555 #elif defined( ST_INIT_IN_ST_H )
 556     p_this->thread_id = st_thread_create( func, p_data, 1, 0 );
 557     i_ret = 0;
 558
 559 #elif defined( WIN32 ) || defined( UNDER_CE )
 560     {
 561         unsigned threadID;
 562         /* When using the MSVCRT C library you have to use the _beginthreadex
 563          * function instead of CreateThread, otherwise you'll end up with
 564          * memory leaks and the signal functions not working (see Microsoft
 565          * Knowledge Base, article 104641) */
 566         p_this->thread_id =
 567 #if defined( UNDER_CE )
 568                 (HANDLE)CreateThread( NULL, 0, (PTHREAD_START) func,
 569                                       p_data, 0, &threadID );
 570 #else
 571                 (HANDLE)_beginthreadex( NULL, 0, (PTHREAD_START) func,
 572                                         p_data, 0, &threadID );
 573 #endif
 574     }
 575
 576     if( p_this->thread_id && i_priority )
 577     {
 578         if( !SetThreadPriority(p_this->thread_id, i_priority) )
 579         {
 580             msg_Warn( p_this, "couldn't set a faster priority" );
 581             i_priority = 0;
 582         }
 583     }
 584
 585     i_ret = ( p_this->thread_id ? 0 : 1 );
 586
 587 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 588     p_this->thread_id = spawn_thread( (thread_func)func, psz_name,
 589                                       i_priority, p_data );
 590     i_ret = resume_thread( p_this->thread_id );
 591
 592 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 593     i_ret = pthread_create( &p_this->thread_id, NULL, func, p_data );
 594
 595 #ifndef __APPLE__
 596     if( config_GetInt( p_this, "rt-priority" ) )
 597 #endif
 598     {
 599         int i_error, i_policy;
 600         struct sched_param param;
 601
 602         memset( &param, 0, sizeof(struct sched_param) );
 603         if( config_GetType( p_this, "rt-offset" ) )
 604         {
 605             i_priority += config_GetInt( p_this, "rt-offset" );
 606         }
 607         if( i_priority <= 0 )
 608         {
 609             param.sched_priority = (-1) * i_priority;
 610             i_policy = SCHED_OTHER;
 611         }
 612         else
 613         {
 614             param.sched_priority = i_priority;
 615             i_policy = SCHED_RR;
 616         }
 617         if( (i_error = pthread_setschedparam( p_this->thread_id,
 618                                                i_policy, &param )) )
 619         {
 620             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s",
 621                       psz_file, i_line, strerror(i_error) );
 622             i_priority = 0;
 623         }
 624     }
 625 #ifndef __APPLE__
 626     else
 627     {
 628         i_priority = 0;
 629     }
 630 #endif
 631
 632 #elif defined( HAVE_CTHREADS_H )
 633     p_this->thread_id = cthread_fork( (cthread_fn_t)func, (any_t)p_data );
 634     i_ret = 0;
 635
 636 #endif
 637
 638     if( i_ret == 0 )
 639     {
 640         if( b_wait )
 641         {
 642             msg_Dbg( p_this, "waiting for thread completion" );
 643             vlc_cond_wait( &p_this->object_wait, &p_this->object_lock );
 644         }
 645
 646         p_this->b_thread = 1;
 647
 648         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 649                  (unsigned int)p_this->thread_id, psz_name, i_priority,
 650                  psz_file, i_line );
 651
 652         vlc_mutex_unlock( &p_this->object_lock );
 653     }
 654     else
 655     {
 656         msg_Err( p_this, "%s thread could not be created at %s:%d (%s)",
 657                          psz_name, psz_file, i_line, strerror(i_ret) );
 658         vlc_mutex_unlock( &p_this->object_lock );
 659     }
 660
 661     return i_ret;
 662 }
 663
 664 /*****************************************************************************
 665  * vlc_thread_set_priority: set the priority of the current thread when we
 666  * couldn't set it in vlc_thread_create (for instance for the main thread)
 667  *****************************************************************************/
 668 int __vlc_thread_set_priority( vlc_object_t *p_this, const char * psz_file,
 669                                int i_line, int i_priority )
 670 {
 671 #if defined( PTH_INIT_IN_PTH_H ) || defined( ST_INIT_IN_ST_H )
 672 #elif defined( WIN32 ) || defined( UNDER_CE )
 673     if( !SetThreadPriority(GetCurrentThread(), i_priority) )
 674     {
 675         msg_Warn( p_this, "couldn't set a faster priority" );
 676         return 1;
 677     }
 678
 679 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 680 #ifndef __APPLE__
 681     if( config_GetInt( p_this, "rt-priority" ) )
 682 #endif
 683     {
 684         int i_error, i_policy;
 685         struct sched_param param;
 686
 687         memset( &param, 0, sizeof(struct sched_param) );
 688         if( config_GetType( p_this, "rt-offset" ) )
 689         {
 690             i_priority += config_GetInt( p_this, "rt-offset" );
 691         }
 692         if( i_priority <= 0 )
 693         {
 694             param.sched_priority = (-1) * i_priority;
 695             i_policy = SCHED_OTHER;
 696         }
 697         else
 698         {
 699             param.sched_priority = i_priority;
 700             i_policy = SCHED_RR;
 701         }
 702         if( !p_this->thread_id )
 703             p_this->thread_id = pthread_self();
 704         if( (i_error = pthread_setschedparam( p_this->thread_id,
 705                                                i_policy, &param )) )
 706         {
 707             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s",
 708                       psz_file, i_line, strerror(i_error) );
 709             i_priority = 0;
 710         }
 711     }
 712 #endif
 713
 714     return 0;
 715 }
 716
 717 /*****************************************************************************
 718  * vlc_thread_ready: tell the parent thread we were successfully spawned
 719  *****************************************************************************/
 720 void __vlc_thread_ready( vlc_object_t *p_this )
 721 {
 722     vlc_mutex_lock( &p_this->object_lock );
 723     vlc_cond_signal( &p_this->object_wait );
 724     vlc_mutex_unlock( &p_this->object_lock );
 725 }
 726
 727 /*****************************************************************************
 728  * vlc_thread_join: wait until a thread exits, inner version
 729  *****************************************************************************/
 730 void __vlc_thread_join( vlc_object_t *p_this, const char * psz_file, int i_line )
 731 {
 732     int i_ret = 0;
 733
 734 #if defined( PTH_INIT_IN_PTH_H )
 735     i_ret = ( pth_join( p_this->thread_id, NULL ) == FALSE );
 736
 737 #elif defined( ST_INIT_IN_ST_H )
 738     i_ret = st_thread_join( p_this->thread_id, NULL );
 739
 740 #elif defined( UNDER_CE ) || defined( WIN32 )
 741     HMODULE hmodule;
 742     BOOL (WINAPI *OurGetThreadTimes)( HANDLE, FILETIME*, FILETIME*,
 743                                       FILETIME*, FILETIME* );
 744     FILETIME create_ft, exit_ft, kernel_ft, user_ft;
 745     int64_t real_time, kernel_time, user_time;
 746
 747     WaitForSingleObject( p_this->thread_id, INFINITE );
 748
 749 #if defined( UNDER_CE )
 750     hmodule = GetModuleHandle( _T("COREDLL") );
 751 #else
 752     hmodule = GetModuleHandle( _T("KERNEL32") );
 753 #endif
 754     OurGetThreadTimes = (BOOL (WINAPI*)( HANDLE, FILETIME*, FILETIME*,
 755                                          FILETIME*, FILETIME* ))
 756         GetProcAddress( hmodule, _T("GetThreadTimes") );
 757
 758     if( OurGetThreadTimes &&
 759         OurGetThreadTimes( p_this->thread_id,
 760                            &create_ft, &exit_ft, &kernel_ft, &user_ft ) )
 761     {
 762         real_time =
 763           ((((int64_t)exit_ft.dwHighDateTime)<<32)| exit_ft.dwLowDateTime) -
 764           ((((int64_t)create_ft.dwHighDateTime)<<32)| create_ft.dwLowDateTime);
 765         real_time /= 10;
 766
 767         kernel_time =
 768           ((((int64_t)kernel_ft.dwHighDateTime)<<32)|
 769            kernel_ft.dwLowDateTime) / 10;
 770
 771         user_time =
 772           ((((int64_t)user_ft.dwHighDateTime)<<32)|
 773            user_ft.dwLowDateTime) / 10;
 774
 775         msg_Dbg( p_this, "thread times: "
 776                  "real "I64Fd"m%fs, kernel "I64Fd"m%fs, user "I64Fd"m%fs",
 777                  real_time/60/1000000,
 778                  (double)((real_time%(60*1000000))/1000000.0),
 779                  kernel_time/60/1000000,
 780                  (double)((kernel_time%(60*1000000))/1000000.0),
 781                  user_time/60/1000000,
 782                  (double)((user_time%(60*1000000))/1000000.0) );
 783     }
 784     CloseHandle( p_this->thread_id );
 785
 786 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 787     int32_t exit_value;
 788     wait_for_thread( p_this->thread_id, &exit_value );
 789
 790 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 791     i_ret = pthread_join( p_this->thread_id, NULL );
 792
 793 #elif defined( HAVE_CTHREADS_H )
 794     cthread_join( p_this->thread_id );
 795     i_ret = 1;
 796
 797 #endif
 798
 799     if( i_ret )
 800     {
 801         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%s)",
 802                          (unsigned int)p_this->thread_id, psz_file, i_line,
 803                          strerror(i_ret) );
 804     }
 805     else
 806     {
 807         msg_Dbg( p_this, "thread %u joined (%s:%d)",
 808                          (unsigned int)p_this->thread_id, psz_file, i_line );
 809     }
 810
 811     p_this->b_thread = 0;
 812 }
 813