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