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     if( IsDebuggerPresent() )
  78     {
  79         /* SignalObjectAndWait() API is problematic under a debugger */
  80         b_fast_mutex = VLC_TRUE;
  81         i_win9x_cv = 0;
  82     }
  83     else
  84     {
  85         b_fast_mutex = VLC_FALSE;
  86         i_win9x_cv = 1;
  87     }
  88 #elif defined( HAVE_KERNEL_SCHEDULER_H )
  89 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
  90     pthread_mutex_lock( &once_mutex );
  91 #elif defined( HAVE_CTHREADS_H )
  92 #endif
  93
  94     if( i_status == VLC_THREADS_UNINITIALIZED )
  95     {
  96         i_status = VLC_THREADS_PENDING;
  97
  98         /* We should be safe now. Do all the initialization stuff we want. */
  99         p_libvlc_global->b_ready = VLC_FALSE;
 100
 101 #if defined( PTH_INIT_IN_PTH_H )
 102         i_ret = ( pth_init() == FALSE );
 103
 104 #elif defined( ST_INIT_IN_ST_H )
 105         i_ret = st_init();
 106
 107 #elif defined( UNDER_CE )
 108         /* Nothing to initialize */
 109
 110 #elif defined( WIN32 )
 111         /* Dynamically get the address of SignalObjectAndWait */
 112         if( GetVersion() < 0x80000000 )
 113         {
 114             HINSTANCE hInstLib;
 115
 116             /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 117             hInstLib = LoadLibrary( "kernel32" );
 118             if( hInstLib )
 119             {
 120                 pf_SignalObjectAndWait =
 121                     (SIGNALOBJECTANDWAIT)GetProcAddress( hInstLib,
 122                                                      "SignalObjectAndWait" );
 123             }
 124         }
 125
 126 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 127 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 128 #elif defined( HAVE_CTHREADS_H )
 129 #endif
 130
 131         p_root = vlc_object_create( p_libvlc_global, VLC_OBJECT_GLOBAL );
 132         if( p_root == NULL )
 133             i_ret = VLC_ENOMEM;
 134
 135         if( i_ret )
 136         {
 137             i_status = VLC_THREADS_ERROR;
 138         }
 139         else
 140         {
 141             i_initializations++;
 142             i_status = VLC_THREADS_READY;
 143         }
 144
 145         vlc_threadvar_create( p_root, &msg_context_global_key );
 146     }
 147     else
 148     {
 149         /* Just increment the initialization count */
 150         i_initializations++;
 151     }
 152
 153     /* If we have lazy mutex initialization support, unlock the mutex;
 154      * otherwize, do a naive wait loop. */
 155 #if defined( PTH_INIT_IN_PTH_H )
 156     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 157 #elif defined( ST_INIT_IN_ST_H )
 158     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 159 #elif defined( UNDER_CE )
 160     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 161 #elif defined( WIN32 )
 162     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 163 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 164     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 165 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 166     pthread_mutex_unlock( &once_mutex );
 167 #elif defined( HAVE_CTHREADS_H )
 168     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 169 #endif
 170
 171     if( i_status != VLC_THREADS_READY )
 172     {
 173         return VLC_ETHREAD;
 174     }
 175
 176     return i_ret;
 177 }
 178
 179 /*****************************************************************************
 180  * vlc_threads_end: stop threads system
 181  *****************************************************************************
 182  * FIXME: This function is far from being threadsafe.
 183  *****************************************************************************/
 184 int __vlc_threads_end( vlc_object_t *p_this )
 185 {
 186     (void)p_this;
 187 #if defined( PTH_INIT_IN_PTH_H )
 188 #elif defined( ST_INIT_IN_ST_H )
 189 #elif defined( UNDER_CE )
 190 #elif defined( WIN32 )
 191 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 192 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 193     pthread_mutex_lock( &once_mutex );
 194 #elif defined( HAVE_CTHREADS_H )
 195 #endif
 196
 197     if( i_initializations == 0 )
 198         return VLC_EGENERIC;
 199
 200     i_initializations--;
 201     if( i_initializations == 0 )
 202     {
 203         i_status = VLC_THREADS_UNINITIALIZED;
 204         vlc_object_destroy( p_root );
 205     }
 206
 207 #if defined( PTH_INIT_IN_PTH_H )
 208     if( i_initializations == 0 )
 209     {
 210         return ( pth_kill() == FALSE );
 211     }
 212
 213 #elif defined( ST_INIT_IN_ST_H )
 214 #elif defined( UNDER_CE )
 215 #elif defined( WIN32 )
 216 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 217 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 218     pthread_mutex_unlock( &once_mutex );
 219 #elif defined( HAVE_CTHREADS_H )
 220 #endif
 221     return VLC_SUCCESS;
 222 }
 223
 224 /*****************************************************************************
 225  * vlc_mutex_init: initialize a mutex
 226  *****************************************************************************/
 227 int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 228 {
 229     p_mutex->p_this = p_this;
 230
 231 #if defined( PTH_INIT_IN_PTH_H )
 232     return ( pth_mutex_init( &p_mutex->mutex ) == FALSE );
 233
 234 #elif defined( ST_INIT_IN_ST_H )
 235     p_mutex->mutex = st_mutex_new();
 236     return ( p_mutex->mutex == NULL ) ? errno : 0;
 237
 238 #elif defined( UNDER_CE )
 239     InitializeCriticalSection( &p_mutex->csection );
 240     return 0;
 241
 242 #elif defined( WIN32 )
 243     /* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
 244      * function and have a 100% correct vlc_cond_wait() implementation.
 245      * As this function is not available on Win9x, we can use the faster
 246      * CriticalSections */
 247     if( pf_SignalObjectAndWait && !b_fast_mutex )
 248     {
 249         /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 250         p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
 251         return ( p_mutex->mutex != NULL ? 0 : 1 );
 252     }
 253     else
 254     {
 255         p_mutex->mutex = NULL;
 256         InitializeCriticalSection( &p_mutex->csection );
 257         return 0;
 258     }
 259
 260 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 261     /* check the arguments and whether it's already been initialized */
 262     if( p_mutex == NULL )
 263     {
 264         return B_BAD_VALUE;
 265     }
 266
 267     if( p_mutex->init == 9999 )
 268     {
 269         return EALREADY;
 270     }
 271
 272     p_mutex->lock = create_sem( 1, "BeMutex" );
 273     if( p_mutex->lock < B_NO_ERROR )
 274     {
 275         return( -1 );
 276     }
 277
 278     p_mutex->init = 9999;
 279     return B_OK;
 280
 281 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 282 #   if defined(DEBUG) && defined(SYS_LINUX)
 283     {
 284         /* Create error-checking mutex to detect problems more easily. */
 285         pthread_mutexattr_t attr;
 286         int                 i_result;
 287
 288         pthread_mutexattr_init( &attr );
 289         pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 290         i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 291         pthread_mutexattr_destroy( &attr );
 292         return( i_result );
 293     }
 294 #   endif
 295     return pthread_mutex_init( &p_mutex->mutex, NULL );
 296
 297 #elif defined( HAVE_CTHREADS_H )
 298     mutex_init( p_mutex );
 299     return 0;
 300
 301 #endif
 302 }
 303
 304 /*****************************************************************************
 305  * vlc_mutex_destroy: destroy a mutex, inner version
 306  *****************************************************************************/
 307 int __vlc_mutex_destroy( const char * psz_file, int i_line, vlc_mutex_t *p_mutex )
 308 {
 309     int i_result;
 310     /* In case of error : */
 311     int i_thread = -1;
 312     const char * psz_error = "";
 313
 314 #if defined( PTH_INIT_IN_PTH_H )
 315     return 0;
 316
 317 #elif defined( ST_INIT_IN_ST_H )
 318     i_result = st_mutex_destroy( p_mutex->mutex );
 319
 320 #elif defined( UNDER_CE )
 321     DeleteCriticalSection( &p_mutex->csection );
 322     return 0;
 323
 324 #elif defined( WIN32 )
 325     if( p_mutex->mutex )
 326     {
 327         CloseHandle( p_mutex->mutex );
 328     }
 329     else
 330     {
 331         DeleteCriticalSection( &p_mutex->csection );
 332     }
 333     return 0;
 334
 335 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 336     if( p_mutex->init == 9999 )
 337     {
 338         delete_sem( p_mutex->lock );
 339     }
 340
 341     p_mutex->init = 0;
 342     return B_OK;
 343
 344 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 345     i_result = pthread_mutex_destroy( &p_mutex->mutex );
 346     if( i_result )
 347     {
 348         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 349         psz_error = strerror(i_result);
 350     }
 351
 352 #elif defined( HAVE_CTHREADS_H )
 353     return 0;
 354
 355 #endif
 356
 357     if( i_result )
 358     {
 359         msg_Err( p_mutex->p_this,
 360                  "thread %d: mutex_destroy failed at %s:%d (%d:%s)",
 361                  i_thread, psz_file, i_line, i_result, psz_error );
 362     }
 363     return i_result;
 364 }
 365
 366 /*****************************************************************************
 367  * vlc_cond_init: initialize a condition
 368  *****************************************************************************/
 369 int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar )
 370 {
 371     p_condvar->p_this = p_this;
 372
 373 #if defined( PTH_INIT_IN_PTH_H )
 374     return ( pth_cond_init( &p_condvar->cond ) == FALSE );
 375
 376 #elif defined( ST_INIT_IN_ST_H )
 377     p_condvar->cond = st_cond_new();
 378     return ( p_condvar->cond == NULL ) ? errno : 0;
 379
 380 #elif defined( UNDER_CE )
 381     /* Initialize counter */
 382     p_condvar->i_waiting_threads = 0;
 383
 384     /* Create an auto-reset event. */
 385     p_condvar->event = CreateEvent( NULL,   /* no security */
 386                                     FALSE,  /* auto-reset event */
 387                                     FALSE,  /* start non-signaled */
 388                                     NULL ); /* unnamed */
 389     return !p_condvar->event;
 390
 391 #elif defined( WIN32 )
 392     /* Initialize counter */
 393     p_condvar->i_waiting_threads = 0;
 394
 395     /* Misc init */
 396     p_condvar->i_win9x_cv = i_win9x_cv;
 397     p_condvar->SignalObjectAndWait = pf_SignalObjectAndWait;
 398
 399     if( (p_condvar->SignalObjectAndWait && !b_fast_mutex)
 400         || p_condvar->i_win9x_cv == 0 )
 401     {
 402         /* Create an auto-reset event. */
 403         p_condvar->event = CreateEvent( NULL,   /* no security */
 404                                         FALSE,  /* auto-reset event */
 405                                         FALSE,  /* start non-signaled */
 406                                         NULL ); /* unnamed */
 407
 408         p_condvar->semaphore = NULL;
 409         return !p_condvar->event;
 410     }
 411     else
 412     {
 413         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
 414                                                 0,          /* initial count */
 415                                                 0x7fffffff, /* max count */
 416                                                 NULL );     /* unnamed */
 417
 418         if( p_condvar->i_win9x_cv == 1 )
 419             /* Create a manual-reset event initially signaled. */
 420             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
 421         else
 422             /* Create a auto-reset event. */
 423             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
 424
 425         InitializeCriticalSection( &p_condvar->csection );
 426
 427         return !p_condvar->semaphore || !p_condvar->event;
 428     }
 429
 430 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 431     if( !p_condvar )
 432     {
 433         return B_BAD_VALUE;
 434     }
 435
 436     if( p_condvar->init == 9999 )
 437     {
 438         return EALREADY;
 439     }
 440
 441     p_condvar->thread = -1;
 442     p_condvar->init = 9999;
 443     return 0;
 444
 445 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 446     return pthread_cond_init( &p_condvar->cond, NULL );
 447
 448 #elif defined( HAVE_CTHREADS_H )
 449     /* condition_init() */
 450     spin_lock_init( &p_condvar->lock );
 451     cthread_queue_init( &p_condvar->queue );
 452     p_condvar->name = 0;
 453     p_condvar->implications = 0;
 454
 455     return 0;
 456
 457 #endif
 458 }
 459
 460 /*****************************************************************************
 461  * vlc_cond_destroy: destroy a condition, inner version
 462  *****************************************************************************/
 463 int __vlc_cond_destroy( const char * psz_file, int i_line, vlc_cond_t *p_condvar )
 464 {
 465     int i_result;
 466     /* In case of error : */
 467     int i_thread = -1;
 468     const char * psz_error = "";
 469
 470 #if defined( PTH_INIT_IN_PTH_H )
 471     return 0;
 472
 473 #elif defined( ST_INIT_IN_ST_H )
 474     i_result = st_cond_destroy( p_condvar->cond );
 475
 476 #elif defined( UNDER_CE )
 477     i_result = !CloseHandle( p_condvar->event );
 478
 479 #elif defined( WIN32 )
 480     if( !p_condvar->semaphore )
 481         i_result = !CloseHandle( p_condvar->event );
 482     else
 483         i_result = !CloseHandle( p_condvar->event )
 484           || !CloseHandle( p_condvar->semaphore );
 485
 486     if( p_condvar->semaphore != NULL )
 487                 DeleteCriticalSection( &p_condvar->csection );
 488
 489 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 490     p_condvar->init = 0;
 491     return 0;
 492
 493 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 494     i_result = pthread_cond_destroy( &p_condvar->cond );
 495     if( i_result )
 496     {
 497         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 498         psz_error = strerror(i_result);
 499     }
 500
 501 #elif defined( HAVE_CTHREADS_H )
 502     return 0;
 503
 504 #endif
 505
 506     if( i_result )
 507     {
 508         msg_Err( p_condvar->p_this,
 509                  "thread %d: cond_destroy failed at %s:%d (%d:%s)",
 510                  i_thread, psz_file, i_line, i_result, psz_error );
 511     }
 512     return i_result;
 513 }
 514
 515 /*****************************************************************************
 516  * vlc_tls_create: create a thread-local variable
 517  *****************************************************************************/
 518 int __vlc_threadvar_create( vlc_object_t *p_this, vlc_threadvar_t *p_tls )
 519 {
 520     int i_ret = -1;
 521     (void)p_this;
 522 #if defined( PTH_INIT_IN_PTH_H )
 523     i_ret = pth_key_create( &p_tls->handle, NULL );
 524 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 525     msg_Err( p_this, "TLS not implemented" );
 526     i_ret VLC_EGENERIC;
 527 #elif defined( ST_INIT_IN_ST_H )
 528     i_ret = st_key_create( &p_tls->handle, NULL );
 529 #elif defined( UNDER_CE ) || defined( WIN32 )
 530 #elif defined( WIN32 )
 531     p_tls->handle = TlsAlloc();
 532     i_ret = !( p_tls->handle == 0xFFFFFFFF );
 533
 534 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 535     i_ret =  pthread_key_create( &p_tls->handle, NULL );
 536 #elif defined( HAVE_CTHREADS_H )
 537     i_ret = cthread_keycreate( &p_tls-handle );
 538 #endif
 539     return i_ret;
 540 }
 541
 542 /*****************************************************************************
 543  * vlc_thread_create: create a thread, inner version
 544  *****************************************************************************
 545  * Note that i_priority is only taken into account on platforms supporting
 546  * userland real-time priority threads.
 547  *****************************************************************************/
 548 int __vlc_thread_create( vlc_object_t *p_this, const char * psz_file, int i_line,
 549                          const char *psz_name, void * ( *func ) ( void * ),
 550                          int i_priority, vlc_bool_t b_wait )
 551 {
 552     int i_ret;
 553     void *p_data = (void *)p_this;
 554
 555     vlc_mutex_lock( &p_this->object_lock );
 556
 557 #if defined( PTH_INIT_IN_PTH_H )
 558     p_this->thread_id = pth_spawn( PTH_ATTR_DEFAULT, func, p_data );
 559     i_ret = p_this->thread_id == NULL;
 560
 561 #elif defined( ST_INIT_IN_ST_H )
 562     p_this->thread_id = st_thread_create( func, p_data, 1, 0 );
 563     i_ret = 0;
 564
 565 #elif defined( WIN32 ) || defined( UNDER_CE )
 566     {
 567         unsigned threadID;
 568         /* When using the MSVCRT C library you have to use the _beginthreadex
 569          * function instead of CreateThread, otherwise you'll end up with
 570          * memory leaks and the signal functions not working (see Microsoft
 571          * Knowledge Base, article 104641) */
 572         p_this->thread_id =
 573 #if defined( UNDER_CE )
 574                 (HANDLE)CreateThread( NULL, 0, (PTHREAD_START) func,
 575                                       p_data, 0, &threadID );
 576 #else
 577                 (HANDLE)_beginthreadex( NULL, 0, (PTHREAD_START) func,
 578                                         p_data, 0, &threadID );
 579 #endif
 580     }
 581
 582     if( p_this->thread_id && i_priority )
 583     {
 584         if( !SetThreadPriority(p_this->thread_id, i_priority) )
 585         {
 586             msg_Warn( p_this, "couldn't set a faster priority" );
 587             i_priority = 0;
 588         }
 589     }
 590
 591     i_ret = ( p_this->thread_id ? 0 : 1 );
 592
 593 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 594     p_this->thread_id = spawn_thread( (thread_func)func, psz_name,
 595                                       i_priority, p_data );
 596     i_ret = resume_thread( p_this->thread_id );
 597
 598 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 599     i_ret = pthread_create( &p_this->thread_id, NULL, func, p_data );
 600
 601 #ifndef __APPLE__
 602     if( config_GetInt( p_this, "rt-priority" ) )
 603 #endif
 604     {
 605         int i_error, i_policy;
 606         struct sched_param param;
 607
 608         memset( &param, 0, sizeof(struct sched_param) );
 609         if( config_GetType( p_this, "rt-offset" ) )
 610         {
 611             i_priority += config_GetInt( p_this, "rt-offset" );
 612         }
 613         if( i_priority <= 0 )
 614         {
 615             param.sched_priority = (-1) * i_priority;
 616             i_policy = SCHED_OTHER;
 617         }
 618         else
 619         {
 620             param.sched_priority = i_priority;
 621             i_policy = SCHED_RR;
 622         }
 623         if( (i_error = pthread_setschedparam( p_this->thread_id,
 624                                                i_policy, &param )) )
 625         {
 626             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s",
 627                       psz_file, i_line, strerror(i_error) );
 628             i_priority = 0;
 629         }
 630     }
 631 #ifndef __APPLE__
 632     else
 633     {
 634         i_priority = 0;
 635     }
 636 #endif
 637
 638 #elif defined( HAVE_CTHREADS_H )
 639     p_this->thread_id = cthread_fork( (cthread_fn_t)func, (any_t)p_data );
 640     i_ret = 0;
 641
 642 #endif
 643
 644     if( i_ret == 0 )
 645     {
 646         if( b_wait )
 647         {
 648             msg_Dbg( p_this, "waiting for thread completion" );
 649             vlc_cond_wait( &p_this->object_wait, &p_this->object_lock );
 650         }
 651
 652         p_this->b_thread = 1;
 653
 654         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 655                  (unsigned int)p_this->thread_id, psz_name, i_priority,
 656                  psz_file, i_line );
 657
 658         vlc_mutex_unlock( &p_this->object_lock );
 659     }
 660     else
 661     {
 662         msg_Err( p_this, "%s thread could not be created at %s:%d (%s)",
 663                          psz_name, psz_file, i_line, strerror(i_ret) );
 664         vlc_mutex_unlock( &p_this->object_lock );
 665     }
 666
 667     return i_ret;
 668 }
 669
 670 /*****************************************************************************
 671  * vlc_thread_set_priority: set the priority of the current thread when we
 672  * couldn't set it in vlc_thread_create (for instance for the main thread)
 673  *****************************************************************************/
 674 int __vlc_thread_set_priority( vlc_object_t *p_this, const char * psz_file,
 675                                int i_line, int i_priority )
 676 {
 677 #if defined( PTH_INIT_IN_PTH_H ) || defined( ST_INIT_IN_ST_H )
 678 #elif defined( WIN32 ) || defined( UNDER_CE )
 679     if( !SetThreadPriority(GetCurrentThread(), i_priority) )
 680     {
 681         msg_Warn( p_this, "couldn't set a faster priority" );
 682         return 1;
 683     }
 684
 685 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 686 #ifndef __APPLE__
 687     if( config_GetInt( p_this, "rt-priority" ) )
 688 #endif
 689     {
 690         int i_error, i_policy;
 691         struct sched_param param;
 692
 693         memset( &param, 0, sizeof(struct sched_param) );
 694         if( config_GetType( p_this, "rt-offset" ) )
 695         {
 696             i_priority += config_GetInt( p_this, "rt-offset" );
 697         }
 698         if( i_priority <= 0 )
 699         {
 700             param.sched_priority = (-1) * i_priority;
 701             i_policy = SCHED_OTHER;
 702         }
 703         else
 704         {
 705             param.sched_priority = i_priority;
 706             i_policy = SCHED_RR;
 707         }
 708         if( !p_this->thread_id )
 709             p_this->thread_id = pthread_self();
 710         if( (i_error = pthread_setschedparam( p_this->thread_id,
 711                                                i_policy, &param )) )
 712         {
 713             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s",
 714                       psz_file, i_line, strerror(i_error) );
 715             i_priority = 0;
 716         }
 717     }
 718 #endif
 719
 720     return 0;
 721 }
 722
 723 /*****************************************************************************
 724  * vlc_thread_ready: tell the parent thread we were successfully spawned
 725  *****************************************************************************/
 726 void __vlc_thread_ready( vlc_object_t *p_this )
 727 {
 728     vlc_mutex_lock( &p_this->object_lock );
 729     vlc_cond_signal( &p_this->object_wait );
 730     vlc_mutex_unlock( &p_this->object_lock );
 731 }
 732
 733 /*****************************************************************************
 734  * vlc_thread_join: wait until a thread exits, inner version
 735  *****************************************************************************/
 736 void __vlc_thread_join( vlc_object_t *p_this, const char * psz_file, int i_line )
 737 {
 738     int i_ret = 0;
 739
 740 #if defined( PTH_INIT_IN_PTH_H )
 741     i_ret = ( pth_join( p_this->thread_id, NULL ) == FALSE );
 742
 743 #elif defined( ST_INIT_IN_ST_H )
 744     i_ret = st_thread_join( p_this->thread_id, NULL );
 745
 746 #elif defined( UNDER_CE ) || defined( WIN32 )
 747     HMODULE hmodule;
 748     BOOL (WINAPI *OurGetThreadTimes)( HANDLE, FILETIME*, FILETIME*,
 749                                       FILETIME*, FILETIME* );
 750     FILETIME create_ft, exit_ft, kernel_ft, user_ft;
 751     int64_t real_time, kernel_time, user_time;
 752
 753     WaitForSingleObject( p_this->thread_id, INFINITE );
 754
 755 #if defined( UNDER_CE )
 756     hmodule = GetModuleHandle( _T("COREDLL") );
 757 #else
 758     hmodule = GetModuleHandle( _T("KERNEL32") );
 759 #endif
 760     OurGetThreadTimes = (BOOL (WINAPI*)( HANDLE, FILETIME*, FILETIME*,
 761                                          FILETIME*, FILETIME* ))
 762         GetProcAddress( hmodule, _T("GetThreadTimes") );
 763
 764     if( OurGetThreadTimes &&
 765         OurGetThreadTimes( p_this->thread_id,
 766                            &create_ft, &exit_ft, &kernel_ft, &user_ft ) )
 767     {
 768         real_time =
 769           ((((int64_t)exit_ft.dwHighDateTime)<<32)| exit_ft.dwLowDateTime) -
 770           ((((int64_t)create_ft.dwHighDateTime)<<32)| create_ft.dwLowDateTime);
 771         real_time /= 10;
 772
 773         kernel_time =
 774           ((((int64_t)kernel_ft.dwHighDateTime)<<32)|
 775            kernel_ft.dwLowDateTime) / 10;
 776
 777         user_time =
 778           ((((int64_t)user_ft.dwHighDateTime)<<32)|
 779            user_ft.dwLowDateTime) / 10;
 780
 781         msg_Dbg( p_this, "thread times: "
 782                  "real "I64Fd"m%fs, kernel "I64Fd"m%fs, user "I64Fd"m%fs",
 783                  real_time/60/1000000,
 784                  (double)((real_time%(60*1000000))/1000000.0),
 785                  kernel_time/60/1000000,
 786                  (double)((kernel_time%(60*1000000))/1000000.0),
 787                  user_time/60/1000000,
 788                  (double)((user_time%(60*1000000))/1000000.0) );
 789     }
 790     CloseHandle( p_this->thread_id );
 791
 792 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 793     int32_t exit_value;
 794     wait_for_thread( p_this->thread_id, &exit_value );
 795
 796 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 797     i_ret = pthread_join( p_this->thread_id, NULL );
 798
 799 #elif defined( HAVE_CTHREADS_H )
 800     cthread_join( p_this->thread_id );
 801     i_ret = 1;
 802
 803 #endif
 804
 805     if( i_ret )
 806     {
 807         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%s)",
 808                          (unsigned int)p_this->thread_id, psz_file, i_line,
 809                          strerror(i_ret) );
 810     }
 811     else
 812     {
 813         msg_Dbg( p_this, "thread %u joined (%s:%d)",
 814                          (unsigned int)p_this->thread_id, psz_file, i_line );
 815     }
 816
 817     p_this->b_thread = 0;
 818 }
 819