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 "libvlc.h"
  30 #include <assert.h>
  31 #ifdef HAVE_UNISTD_H
  32 # include <unistd.h>
  33 #endif
  34
  35 #define VLC_THREADS_UNINITIALIZED  0
  36 #define VLC_THREADS_PENDING        1
  37 #define VLC_THREADS_ERROR          2
  38 #define VLC_THREADS_READY          3
  39
  40 /*****************************************************************************
  41  * Global mutex for lazy initialization of the threads system
  42  *****************************************************************************/
  43 static volatile unsigned i_initializations = 0;
  44 static volatile int i_status = VLC_THREADS_UNINITIALIZED;
  45 static vlc_object_t *p_root;
  46
  47 #if defined( PTH_INIT_IN_PTH_H )
  48 #elif defined( ST_INIT_IN_ST_H )
  49 #elif defined( UNDER_CE )
  50 #elif defined( WIN32 )
  51
  52 /* following is only available on NT/2000/XP and above */
  53 static SIGNALOBJECTANDWAIT pf_SignalObjectAndWait = NULL;
  54
  55 /*
  56 ** On Windows NT/2K/XP we use a slow mutex implementation but which
  57 ** allows us to correctly implement condition variables.
  58 ** You can also use the faster Win9x implementation but you might
  59 ** experience problems with it.
  60 */
  61 static vlc_bool_t          b_fast_mutex = VLC_FALSE;
  62 /*
  63 ** On Windows 9x/Me you can use a fast but incorrect condition variables
  64 ** implementation (more precisely there is a possibility for a race
  65 ** condition to happen).
  66 ** However it is possible to use slower alternatives which are more robust.
  67 ** Currently you can choose between implementation 0 (which is the
  68 ** fastest but slightly incorrect), 1 (default) and 2.
  69 */
  70 static int i_win9x_cv = 1;
  71
  72 #elif defined( HAVE_KERNEL_SCHEDULER_H )
  73 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
  74 static pthread_mutex_t once_mutex = PTHREAD_MUTEX_INITIALIZER;
  75 #elif defined( HAVE_CTHREADS_H )
  76 #endif
  77
  78 vlc_threadvar_t msg_context_global_key;
  79
  80 /*****************************************************************************
  81  * vlc_threads_init: initialize threads system
  82  *****************************************************************************
  83  * This function requires lazy initialization of a global lock in order to
  84  * keep the library really thread-safe. Some architectures don't support this
  85  * and thus do not guarantee the complete reentrancy.
  86  *****************************************************************************/
  87 int __vlc_threads_init( vlc_object_t *p_this )
  88 {
  89     libvlc_global_data_t *p_libvlc_global = (libvlc_global_data_t *)p_this;
  90     int i_ret = VLC_SUCCESS;
  91
  92     /* If we have lazy mutex initialization, use it. Otherwise, we just
  93      * hope nothing wrong happens. */
  94 #if defined( PTH_INIT_IN_PTH_H )
  95 #elif defined( ST_INIT_IN_ST_H )
  96 #elif defined( UNDER_CE )
  97 #elif defined( WIN32 )
  98     if( IsDebuggerPresent() )
  99     {
 100         /* SignalObjectAndWait() is problematic under a debugger */
 101         b_fast_mutex = VLC_TRUE;
 102         i_win9x_cv = 1;
 103     }
 104 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 105 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 106     pthread_mutex_lock( &once_mutex );
 107 #elif defined( HAVE_CTHREADS_H )
 108 #endif
 109
 110     if( i_status == VLC_THREADS_UNINITIALIZED )
 111     {
 112         i_status = VLC_THREADS_PENDING;
 113
 114         /* We should be safe now. Do all the initialization stuff we want. */
 115         p_libvlc_global->b_ready = VLC_FALSE;
 116
 117 #if defined( PTH_INIT_IN_PTH_H )
 118         i_ret = ( pth_init() == FALSE );
 119
 120 #elif defined( ST_INIT_IN_ST_H )
 121         i_ret = st_init();
 122
 123 #elif defined( UNDER_CE )
 124         /* Nothing to initialize */
 125
 126 #elif defined( WIN32 )
 127         /* Dynamically get the address of SignalObjectAndWait */
 128         if( GetVersion() < 0x80000000 )
 129         {
 130             HINSTANCE hInstLib;
 131
 132             /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 133             hInstLib = LoadLibrary( "kernel32" );
 134             if( hInstLib )
 135             {
 136                 pf_SignalObjectAndWait =
 137                     (SIGNALOBJECTANDWAIT)GetProcAddress( hInstLib,
 138                                                      "SignalObjectAndWait" );
 139             }
 140         }
 141
 142 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 143 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 144 #elif defined( HAVE_CTHREADS_H )
 145 #endif
 146
 147         p_root = vlc_object_create( p_libvlc_global, VLC_OBJECT_GLOBAL );
 148         if( p_root == NULL )
 149             i_ret = VLC_ENOMEM;
 150
 151         if( i_ret )
 152         {
 153             i_status = VLC_THREADS_ERROR;
 154         }
 155         else
 156         {
 157             i_initializations++;
 158             i_status = VLC_THREADS_READY;
 159         }
 160
 161         vlc_threadvar_create( p_root, &msg_context_global_key );
 162     }
 163     else
 164     {
 165         /* Just increment the initialization count */
 166         i_initializations++;
 167     }
 168
 169     /* If we have lazy mutex initialization support, unlock the mutex;
 170      * otherwize, do a naive wait loop. */
 171 #if defined( PTH_INIT_IN_PTH_H )
 172     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 173 #elif defined( ST_INIT_IN_ST_H )
 174     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 175 #elif defined( UNDER_CE )
 176     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 177 #elif defined( WIN32 )
 178     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 179 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 180     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 181 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 182     pthread_mutex_unlock( &once_mutex );
 183 #elif defined( HAVE_CTHREADS_H )
 184     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 185 #endif
 186
 187     if( i_status != VLC_THREADS_READY )
 188     {
 189         return VLC_ETHREAD;
 190     }
 191
 192     return i_ret;
 193 }
 194
 195 /*****************************************************************************
 196  * vlc_threads_end: stop threads system
 197  *****************************************************************************
 198  * FIXME: This function is far from being threadsafe.
 199  *****************************************************************************/
 200 int __vlc_threads_end( vlc_object_t *p_this )
 201 {
 202     (void)p_this;
 203 #if defined( PTH_INIT_IN_PTH_H )
 204 #elif defined( ST_INIT_IN_ST_H )
 205 #elif defined( UNDER_CE )
 206 #elif defined( WIN32 )
 207 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 208 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 209     pthread_mutex_lock( &once_mutex );
 210 #elif defined( HAVE_CTHREADS_H )
 211 #endif
 212
 213     if( i_initializations == 0 )
 214         return VLC_EGENERIC;
 215
 216     i_initializations--;
 217     if( i_initializations == 0 )
 218     {
 219         i_status = VLC_THREADS_UNINITIALIZED;
 220         vlc_object_destroy( p_root );
 221     }
 222
 223 #if defined( PTH_INIT_IN_PTH_H )
 224     if( i_initializations == 0 )
 225     {
 226         return ( pth_kill() == FALSE );
 227     }
 228
 229 #elif defined( ST_INIT_IN_ST_H )
 230 #elif defined( UNDER_CE )
 231 #elif defined( WIN32 )
 232 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 233 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 234     pthread_mutex_unlock( &once_mutex );
 235 #elif defined( HAVE_CTHREADS_H )
 236 #endif
 237     return VLC_SUCCESS;
 238 }
 239
 240 /*****************************************************************************
 241  * vlc_mutex_init: initialize a mutex
 242  *****************************************************************************/
 243 int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 244 {
 245     assert( p_this );
 246     p_mutex->p_this = p_this;
 247
 248 #if defined( PTH_INIT_IN_PTH_H )
 249     return ( pth_mutex_init( &p_mutex->mutex ) == FALSE );
 250
 251 #elif defined( ST_INIT_IN_ST_H )
 252     p_mutex->mutex = st_mutex_new();
 253     return ( p_mutex->mutex == NULL ) ? errno : 0;
 254
 255 #elif defined( UNDER_CE )
 256     InitializeCriticalSection( &p_mutex->csection );
 257     return 0;
 258
 259 #elif defined( WIN32 )
 260     /* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
 261      * function and have a 100% correct vlc_cond_wait() implementation.
 262      * As this function is not available on Win9x, we can use the faster
 263      * CriticalSections */
 264     if( pf_SignalObjectAndWait && !b_fast_mutex )
 265     {
 266         /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 267         p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
 268         return ( p_mutex->mutex != NULL ? 0 : 1 );
 269     }
 270     else
 271     {
 272         p_mutex->mutex = NULL;
 273         InitializeCriticalSection( &p_mutex->csection );
 274         return 0;
 275     }
 276
 277 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 278     /* check the arguments and whether it's already been initialized */
 279     if( p_mutex == NULL )
 280     {
 281         return B_BAD_VALUE;
 282     }
 283
 284     if( p_mutex->init == 9999 )
 285     {
 286         return EALREADY;
 287     }
 288
 289     p_mutex->lock = create_sem( 1, "BeMutex" );
 290     if( p_mutex->lock < B_NO_ERROR )
 291     {
 292         return( -1 );
 293     }
 294
 295     p_mutex->init = 9999;
 296     return B_OK;
 297
 298 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 299 #   if defined(DEBUG) && defined(SYS_LINUX)
 300     {
 301         /* Create error-checking mutex to detect problems more easily. */
 302         pthread_mutexattr_t attr;
 303         int                 i_result;
 304
 305         pthread_mutexattr_init( &attr );
 306         pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 307         i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 308         pthread_mutexattr_destroy( &attr );
 309         return( i_result );
 310     }
 311 #   endif
 312     return pthread_mutex_init( &p_mutex->mutex, NULL );
 313
 314 #elif defined( HAVE_CTHREADS_H )
 315     mutex_init( p_mutex );
 316     return 0;
 317
 318 #endif
 319 }
 320
 321 /*****************************************************************************
 322  * vlc_mutex_destroy: destroy a mutex, inner version
 323  *****************************************************************************/
 324 int __vlc_mutex_destroy( const char * psz_file, int i_line, vlc_mutex_t *p_mutex )
 325 {
 326     int i_result;
 327     /* In case of error : */
 328     int i_thread = -1;
 329     const char * psz_error = "";
 330
 331 #if defined( PTH_INIT_IN_PTH_H )
 332     return 0;
 333
 334 #elif defined( ST_INIT_IN_ST_H )
 335     i_result = st_mutex_destroy( p_mutex->mutex );
 336
 337 #elif defined( UNDER_CE )
 338     DeleteCriticalSection( &p_mutex->csection );
 339     return 0;
 340
 341 #elif defined( WIN32 )
 342     if( p_mutex->mutex )
 343     {
 344         CloseHandle( p_mutex->mutex );
 345     }
 346     else
 347     {
 348         DeleteCriticalSection( &p_mutex->csection );
 349     }
 350     return 0;
 351
 352 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 353     if( p_mutex->init == 9999 )
 354     {
 355         delete_sem( p_mutex->lock );
 356     }
 357
 358     p_mutex->init = 0;
 359     return B_OK;
 360
 361 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 362     i_result = pthread_mutex_destroy( &p_mutex->mutex );
 363     if( i_result )
 364     {
 365         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 366         psz_error = strerror(i_result);
 367     }
 368
 369 #elif defined( HAVE_CTHREADS_H )
 370     return 0;
 371
 372 #endif
 373
 374     if( i_result )
 375     {
 376         msg_Err( p_mutex->p_this,
 377                  "thread %d: mutex_destroy failed at %s:%d (%d:%s)",
 378                  i_thread, psz_file, i_line, i_result, psz_error );
 379     }
 380     return i_result;
 381 }
 382
 383 /*****************************************************************************
 384  * vlc_cond_init: initialize a condition
 385  *****************************************************************************/
 386 int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar )
 387 {
 388     p_condvar->p_this = p_this;
 389
 390 #if defined( PTH_INIT_IN_PTH_H )
 391     return ( pth_cond_init( &p_condvar->cond ) == FALSE );
 392
 393 #elif defined( ST_INIT_IN_ST_H )
 394     p_condvar->cond = st_cond_new();
 395     return ( p_condvar->cond == NULL ) ? errno : 0;
 396
 397 #elif defined( UNDER_CE )
 398     /* Initialize counter */
 399     p_condvar->i_waiting_threads = 0;
 400
 401     /* Create an auto-reset event. */
 402     p_condvar->event = CreateEvent( NULL,   /* no security */
 403                                     FALSE,  /* auto-reset event */
 404                                     FALSE,  /* start non-signaled */
 405                                     NULL ); /* unnamed */
 406     return !p_condvar->event;
 407
 408 #elif defined( WIN32 )
 409     /* Initialize counter */
 410     p_condvar->i_waiting_threads = 0;
 411
 412     /* Misc init */
 413     p_condvar->i_win9x_cv = i_win9x_cv;
 414     p_condvar->SignalObjectAndWait = pf_SignalObjectAndWait;
 415
 416     if( (p_condvar->SignalObjectAndWait && !b_fast_mutex)
 417         || p_condvar->i_win9x_cv == 0 )
 418     {
 419         /* Create an auto-reset event. */
 420         p_condvar->event = CreateEvent( NULL,   /* no security */
 421                                         FALSE,  /* auto-reset event */
 422                                         FALSE,  /* start non-signaled */
 423                                         NULL ); /* unnamed */
 424
 425         p_condvar->semaphore = NULL;
 426         return !p_condvar->event;
 427     }
 428     else
 429     {
 430         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
 431                                                 0,          /* initial count */
 432                                                 0x7fffffff, /* max count */
 433                                                 NULL );     /* unnamed */
 434
 435         if( p_condvar->i_win9x_cv == 1 )
 436             /* Create a manual-reset event initially signaled. */
 437             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
 438         else
 439             /* Create a auto-reset event. */
 440             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
 441
 442         InitializeCriticalSection( &p_condvar->csection );
 443
 444         return !p_condvar->semaphore || !p_condvar->event;
 445     }
 446
 447 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 448     if( !p_condvar )
 449     {
 450         return B_BAD_VALUE;
 451     }
 452
 453     if( p_condvar->init == 9999 )
 454     {
 455         return EALREADY;
 456     }
 457
 458     p_condvar->thread = -1;
 459     p_condvar->init = 9999;
 460     return 0;
 461
 462 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 463     pthread_condattr_t attr;
 464     int ret;
 465
 466     ret = pthread_condattr_init (&attr);
 467     if (ret)
 468         return ret;
 469
 470 # if defined (_POSIX_MONOTONIC_CLOCK) && (_POSIX_MONOTONIC_CLOCK - 0 >= 0)
 471     /* This must be the same clock as the one in mtime.c */
 472     pthread_condattr_setclock (&attr, CLOCK_MONOTONIC);
 473 # endif
 474
 475     ret = pthread_cond_init (&p_condvar->cond, &attr);
 476     pthread_condattr_destroy (&attr);
 477     return ret;
 478
 479 #elif defined( HAVE_CTHREADS_H )
 480     /* condition_init() */
 481     spin_lock_init( &p_condvar->lock );
 482     cthread_queue_init( &p_condvar->queue );
 483     p_condvar->name = 0;
 484     p_condvar->implications = 0;
 485
 486     return 0;
 487
 488 #endif
 489 }
 490
 491 /*****************************************************************************
 492  * vlc_cond_destroy: destroy a condition, inner version
 493  *****************************************************************************/
 494 int __vlc_cond_destroy( const char * psz_file, int i_line, vlc_cond_t *p_condvar )
 495 {
 496     int i_result;
 497     /* In case of error : */
 498     int i_thread = -1;
 499     const char * psz_error = "";
 500
 501 #if defined( PTH_INIT_IN_PTH_H )
 502     return 0;
 503
 504 #elif defined( ST_INIT_IN_ST_H )
 505     i_result = st_cond_destroy( p_condvar->cond );
 506
 507 #elif defined( UNDER_CE )
 508     i_result = !CloseHandle( p_condvar->event );
 509
 510 #elif defined( WIN32 )
 511     if( !p_condvar->semaphore )
 512         i_result = !CloseHandle( p_condvar->event );
 513     else
 514         i_result = !CloseHandle( p_condvar->event )
 515           || !CloseHandle( p_condvar->semaphore );
 516
 517     if( p_condvar->semaphore != NULL )
 518         DeleteCriticalSection( &p_condvar->csection );
 519
 520 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 521     p_condvar->init = 0;
 522     return 0;
 523
 524 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 525     i_result = pthread_cond_destroy( &p_condvar->cond );
 526     if( i_result )
 527     {
 528         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 529         psz_error = strerror(i_result);
 530     }
 531
 532 #elif defined( HAVE_CTHREADS_H )
 533     return 0;
 534
 535 #endif
 536
 537     if( i_result )
 538     {
 539         msg_Err( p_condvar->p_this,
 540                  "thread %d: cond_destroy failed at %s:%d (%d:%s)",
 541                  i_thread, psz_file, i_line, i_result, psz_error );
 542     }
 543     return i_result;
 544 }
 545
 546 /*****************************************************************************
 547  * vlc_tls_create: create a thread-local variable
 548  *****************************************************************************/
 549 int __vlc_threadvar_create( vlc_object_t *p_this, vlc_threadvar_t *p_tls )
 550 {
 551     int i_ret = -1;
 552     (void)p_this;
 553 #if defined( PTH_INIT_IN_PTH_H )
 554     i_ret = pth_key_create( &p_tls->handle, NULL );
 555 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 556     msg_Err( p_this, "TLS not implemented" );
 557     i_ret VLC_EGENERIC;
 558 #elif defined( ST_INIT_IN_ST_H )
 559     i_ret = st_key_create( &p_tls->handle, NULL );
 560 #elif defined( UNDER_CE ) || defined( WIN32 )
 561 #elif defined( WIN32 )
 562     p_tls->handle = TlsAlloc();
 563     i_ret = !( p_tls->handle == 0xFFFFFFFF );
 564
 565 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 566     i_ret =  pthread_key_create( &p_tls->handle, NULL );
 567 #elif defined( HAVE_CTHREADS_H )
 568     i_ret = cthread_keycreate( &p_tls-handle );
 569 #endif
 570     return i_ret;
 571 }
 572
 573 /*****************************************************************************
 574  * vlc_thread_create: create a thread, inner version
 575  *****************************************************************************
 576  * Note that i_priority is only taken into account on platforms supporting
 577  * userland real-time priority threads.
 578  *****************************************************************************/
 579 int __vlc_thread_create( vlc_object_t *p_this, const char * psz_file, int i_line,
 580                          const char *psz_name, void * ( *func ) ( void * ),
 581                          int i_priority, vlc_bool_t b_wait )
 582 {
 583     int i_ret;
 584     void *p_data = (void *)p_this;
 585     vlc_object_internals_t *p_priv = p_this->p_internals;
 586
 587     vlc_mutex_lock( &p_this->object_lock );
 588
 589 #if defined( PTH_INIT_IN_PTH_H )
 590     p_priv->thread_id = pth_spawn( PTH_ATTR_DEFAULT, func, p_data );
 591     i_ret = p_priv->thread_id == NULL;
 592
 593 #elif defined( ST_INIT_IN_ST_H )
 594     p_priv->thread_id = st_thread_create( func, p_data, 1, 0 );
 595     i_ret = 0;
 596
 597 #elif defined( WIN32 ) || defined( UNDER_CE )
 598     {
 599         /* When using the MSVCRT C library you have to use the _beginthreadex
 600          * function instead of CreateThread, otherwise you'll end up with
 601          * memory leaks and the signal functions not working (see Microsoft
 602          * Knowledge Base, article 104641) */
 603 #if defined( UNDER_CE )
 604         DWORD  threadId;
 605         HANDLE hThread = CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE)func,
 606                                       (LPVOID)p_data, CREATE_SUSPENDED,
 607                       &threadId );
 608 #else
 609         unsigned threadId;
 610         uintptr_t hThread = _beginthreadex( NULL, 0,
 611                         (LPTHREAD_START_ROUTINE)func,
 612                                             (void*)p_data, CREATE_SUSPENDED,
 613                         &threadId );
 614 #endif
 615         p_priv->thread_id.id = (DWORD)threadId;
 616         p_priv->thread_id.hThread = (HANDLE)hThread;
 617     ResumeThread((HANDLE)hThread);
 618     }
 619
 620     i_ret = ( p_priv->thread_id.hThread ? 0 : 1 );
 621
 622     if( i_ret && i_priority )
 623     {
 624         if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
 625         {
 626             msg_Warn( p_this, "couldn't set a faster priority" );
 627             i_priority = 0;
 628         }
 629     }
 630
 631 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 632     p_priv->thread_id = spawn_thread( (thread_func)func, psz_name,
 633                                       i_priority, p_data );
 634     i_ret = resume_thread( p_priv->thread_id );
 635
 636 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 637     i_ret = pthread_create( &p_priv->thread_id, NULL, func, p_data );
 638
 639 #ifndef __APPLE__
 640     if( config_GetInt( p_this, "rt-priority" ) )
 641 #endif
 642     {
 643         int i_error, i_policy;
 644         struct sched_param param;
 645
 646         memset( &param, 0, sizeof(struct sched_param) );
 647         if( config_GetType( p_this, "rt-offset" ) )
 648         {
 649             i_priority += config_GetInt( p_this, "rt-offset" );
 650         }
 651         if( i_priority <= 0 )
 652         {
 653             param.sched_priority = (-1) * i_priority;
 654             i_policy = SCHED_OTHER;
 655         }
 656         else
 657         {
 658             param.sched_priority = i_priority;
 659             i_policy = SCHED_RR;
 660         }
 661         if( (i_error = pthread_setschedparam( p_priv->thread_id,
 662                                                i_policy, &param )) )
 663         {
 664             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s",
 665                       psz_file, i_line, strerror(i_error) );
 666             i_priority = 0;
 667         }
 668     }
 669 #ifndef __APPLE__
 670     else
 671     {
 672         i_priority = 0;
 673     }
 674 #endif
 675
 676 #elif defined( HAVE_CTHREADS_H )
 677     p_priv->thread_id = cthread_fork( (cthread_fn_t)func, (any_t)p_data );
 678     i_ret = 0;
 679
 680 #endif
 681
 682     if( i_ret == 0 )
 683     {
 684         if( b_wait )
 685         {
 686             msg_Dbg( p_this, "waiting for thread completion" );
 687             vlc_object_wait( p_this );
 688         }
 689
 690         p_priv->b_thread = VLC_TRUE;
 691
 692 #if defined( WIN32 ) || defined( UNDER_CE )
 693         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 694                  (unsigned int)p_priv->thread_id.id, psz_name,
 695          i_priority, psz_file, i_line );
 696 #else
 697         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 698                  (unsigned int)p_priv->thread_id, psz_name, i_priority,
 699                  psz_file, i_line );
 700 #endif
 701
 702
 703         vlc_mutex_unlock( &p_this->object_lock );
 704     }
 705     else
 706     {
 707         msg_Err( p_this, "%s thread could not be created at %s:%d (%s)",
 708                          psz_name, psz_file, i_line, strerror(i_ret) );
 709         vlc_mutex_unlock( &p_this->object_lock );
 710     }
 711
 712     return i_ret;
 713 }
 714
 715 /*****************************************************************************
 716  * vlc_thread_set_priority: set the priority of the current thread when we
 717  * couldn't set it in vlc_thread_create (for instance for the main thread)
 718  *****************************************************************************/
 719 int __vlc_thread_set_priority( vlc_object_t *p_this, const char * psz_file,
 720                                int i_line, int i_priority )
 721 {
 722     vlc_object_internals_t *p_priv = p_this->p_internals;
 723 #if defined( PTH_INIT_IN_PTH_H ) || defined( ST_INIT_IN_ST_H )
 724 #elif defined( WIN32 ) || defined( UNDER_CE )
 725     if( !p_priv->thread_id.hThread )
 726         p_priv->thread_id.hThread = GetCurrentThread();
 727     if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
 728     {
 729         msg_Warn( p_this, "couldn't set a faster priority" );
 730         return 1;
 731     }
 732
 733 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 734 # ifndef __APPLE__
 735     if( config_GetInt( p_this, "rt-priority" ) > 0 )
 736 # endif
 737     {
 738         int i_error, i_policy;
 739         struct sched_param param;
 740
 741         memset( &param, 0, sizeof(struct sched_param) );
 742         if( config_GetType( p_this, "rt-offset" ) )
 743         {
 744             i_priority += config_GetInt( p_this, "rt-offset" );
 745         }
 746         if( i_priority <= 0 )
 747         {
 748             param.sched_priority = (-1) * i_priority;
 749             i_policy = SCHED_OTHER;
 750         }
 751         else
 752         {
 753             param.sched_priority = i_priority;
 754             i_policy = SCHED_RR;
 755         }
 756         if( !p_priv->thread_id )
 757             p_priv->thread_id = pthread_self();
 758         if( (i_error = pthread_setschedparam( p_priv->thread_id,
 759                                                i_policy, &param )) )
 760         {
 761             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s",
 762                       psz_file, i_line, strerror(i_error) );
 763             i_priority = 0;
 764         }
 765     }
 766 #endif
 767
 768     return 0;
 769 }
 770
 771 /*****************************************************************************
 772  * vlc_thread_ready: tell the parent thread we were successfully spawned
 773  *****************************************************************************/
 774 void __vlc_thread_ready( vlc_object_t *p_this )
 775 {
 776     vlc_object_signal( p_this );
 777 }
 778
 779 /*****************************************************************************
 780  * vlc_thread_join: wait until a thread exits, inner version
 781  *****************************************************************************/
 782 void __vlc_thread_join( vlc_object_t *p_this, const char * psz_file, int i_line )
 783 {
 784     vlc_object_internals_t *p_priv = p_this->p_internals;
 785
 786 #if defined( UNDER_CE ) || defined( WIN32 )
 787     HMODULE hmodule;
 788     BOOL (WINAPI *OurGetThreadTimes)( HANDLE, FILETIME*, FILETIME*,
 789                                       FILETIME*, FILETIME* );
 790     FILETIME create_ft, exit_ft, kernel_ft, user_ft;
 791     int64_t real_time, kernel_time, user_time;
 792     HANDLE hThread;
 793
 794     /*
 795     ** object will close its thread handle when destroyed, duplicate it here
 796     ** to be on the safe side
 797     */
 798     if( ! DuplicateHandle(GetCurrentProcess(),
 799             p_priv->thread_id.hThread,
 800             GetCurrentProcess(),
 801             &hThread,
 802             0,
 803             FALSE,
 804             DUPLICATE_SAME_ACCESS) )
 805     {
 806         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%s)",
 807                          (unsigned int)p_priv->thread_id.id,
 808              psz_file, i_line, GetLastError() );
 809         p_priv->b_thread = VLC_FALSE;
 810         return;
 811     }
 812
 813     WaitForSingleObject( hThread, INFINITE );
 814
 815     msg_Dbg( p_this, "thread %u joined (%s:%d)",
 816              (unsigned int)p_priv->thread_id.id,
 817              psz_file, i_line );
 818 #if defined( UNDER_CE )
 819     hmodule = GetModuleHandle( _T("COREDLL") );
 820 #else
 821     hmodule = GetModuleHandle( _T("KERNEL32") );
 822 #endif
 823     OurGetThreadTimes = (BOOL (WINAPI*)( HANDLE, FILETIME*, FILETIME*,
 824                                          FILETIME*, FILETIME* ))
 825         GetProcAddress( hmodule, _T("GetThreadTimes") );
 826
 827     if( OurGetThreadTimes &&
 828         OurGetThreadTimes( hThread,
 829                            &create_ft, &exit_ft, &kernel_ft, &user_ft ) )
 830     {
 831         real_time =
 832           ((((int64_t)exit_ft.dwHighDateTime)<<32)| exit_ft.dwLowDateTime) -
 833           ((((int64_t)create_ft.dwHighDateTime)<<32)| create_ft.dwLowDateTime);
 834         real_time /= 10;
 835
 836         kernel_time =
 837           ((((int64_t)kernel_ft.dwHighDateTime)<<32)|
 838            kernel_ft.dwLowDateTime) / 10;
 839
 840         user_time =
 841           ((((int64_t)user_ft.dwHighDateTime)<<32)|
 842            user_ft.dwLowDateTime) / 10;
 843
 844         msg_Dbg( p_this, "thread times: "
 845                  "real "I64Fd"m%fs, kernel "I64Fd"m%fs, user "I64Fd"m%fs",
 846                  real_time/60/1000000,
 847                  (double)((real_time%(60*1000000))/1000000.0),
 848                  kernel_time/60/1000000,
 849                  (double)((kernel_time%(60*1000000))/1000000.0),
 850                  user_time/60/1000000,
 851                  (double)((user_time%(60*1000000))/1000000.0) );
 852     }
 853     CloseHandle( hThread );
 854
 855 #else /* !defined(WIN32) */
 856
 857     int i_ret = 0;
 858
 859 #if defined( PTH_INIT_IN_PTH_H )
 860     i_ret = ( pth_join( p_priv->thread_id, NULL ) == FALSE );
 861
 862 #elif defined( ST_INIT_IN_ST_H )
 863     i_ret = st_thread_join( p_priv->thread_id, NULL );
 864
 865 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 866     int32_t exit_value;
 867     i_ret = (B_OK == wait_for_thread( p_priv->thread_id, &exit_value ));
 868
 869 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 870     i_ret = pthread_join( p_priv->thread_id, NULL );
 871
 872 #elif defined( HAVE_CTHREADS_H )
 873     cthread_join( p_priv->thread_id );
 874     i_ret = 1;
 875
 876 #endif
 877
 878     if( i_ret )
 879     {
 880         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%s)",
 881                          (unsigned int)p_priv->thread_id, psz_file, i_line,
 882                          strerror(i_ret) );
 883     }
 884     else
 885     {
 886         msg_Dbg( p_this, "thread %u joined (%s:%d)",
 887                          (unsigned int)p_priv->thread_id, psz_file, i_line );
 888     }
 889
 890 #endif
 891
 892     p_priv->b_thread = VLC_FALSE;
 893 }
 894