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_error: Report an error from the threading mecanism
  82  *****************************************************************************
  83  * This is especially useful to debug those errors, as this is a nice symbol
  84  * on which you can break.
  85  *****************************************************************************/
  86 void
  87 __vlc_threads_error( vlc_object_t *p_this )
  88 {
  89     msg_Err( p_this, "Error detected. Put a breakpoint in '%s' to debug.",
  90             __func__ );
  91 }
  92
  93 /*****************************************************************************
  94  * vlc_threads_init: initialize threads system
  95  *****************************************************************************
  96  * This function requires lazy initialization of a global lock in order to
  97  * keep the library really thread-safe. Some architectures don't support this
  98  * and thus do not guarantee the complete reentrancy.
  99  *****************************************************************************/
 100 int __vlc_threads_init( vlc_object_t *p_this )
 101 {
 102     libvlc_global_data_t *p_libvlc_global = (libvlc_global_data_t *)p_this;
 103     int i_ret = VLC_SUCCESS;
 104
 105     /* If we have lazy mutex initialization, use it. Otherwise, we just
 106      * hope nothing wrong happens. */
 107 #if defined( PTH_INIT_IN_PTH_H )
 108 #elif defined( ST_INIT_IN_ST_H )
 109 #elif defined( UNDER_CE )
 110 #elif defined( WIN32 )
 111     if( IsDebuggerPresent() )
 112     {
 113         /* SignalObjectAndWait() is problematic under a debugger */
 114         b_fast_mutex = VLC_TRUE;
 115         i_win9x_cv = 1;
 116     }
 117 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 118 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 119     pthread_mutex_lock( &once_mutex );
 120 #elif defined( HAVE_CTHREADS_H )
 121 #endif
 122
 123     if( i_status == VLC_THREADS_UNINITIALIZED )
 124     {
 125         i_status = VLC_THREADS_PENDING;
 126
 127         /* We should be safe now. Do all the initialization stuff we want. */
 128         p_libvlc_global->b_ready = VLC_FALSE;
 129
 130 #if defined( PTH_INIT_IN_PTH_H )
 131         i_ret = ( pth_init() == FALSE );
 132
 133 #elif defined( ST_INIT_IN_ST_H )
 134         i_ret = st_init();
 135
 136 #elif defined( UNDER_CE )
 137         /* Nothing to initialize */
 138
 139 #elif defined( WIN32 )
 140         /* Dynamically get the address of SignalObjectAndWait */
 141         if( GetVersion() < 0x80000000 )
 142         {
 143             HINSTANCE hInstLib;
 144
 145             /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 146             hInstLib = LoadLibrary( "kernel32" );
 147             if( hInstLib )
 148             {
 149                 pf_SignalObjectAndWait =
 150                     (SIGNALOBJECTANDWAIT)GetProcAddress( hInstLib,
 151                                                      "SignalObjectAndWait" );
 152             }
 153         }
 154
 155 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 156 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 157 #elif defined( HAVE_CTHREADS_H )
 158 #endif
 159
 160         p_root = vlc_object_create( p_libvlc_global, VLC_OBJECT_GLOBAL );
 161         if( p_root == NULL )
 162             i_ret = VLC_ENOMEM;
 163
 164         if( i_ret )
 165         {
 166             i_status = VLC_THREADS_ERROR;
 167         }
 168         else
 169         {
 170             i_initializations++;
 171             i_status = VLC_THREADS_READY;
 172         }
 173
 174         vlc_threadvar_create( p_root, &msg_context_global_key );
 175     }
 176     else
 177     {
 178         /* Just increment the initialization count */
 179         i_initializations++;
 180     }
 181
 182     /* If we have lazy mutex initialization support, unlock the mutex;
 183      * otherwize, do a naive wait loop. */
 184 #if defined( PTH_INIT_IN_PTH_H )
 185     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 186 #elif defined( ST_INIT_IN_ST_H )
 187     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 188 #elif defined( UNDER_CE )
 189     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 190 #elif defined( WIN32 )
 191     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 192 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 193     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 194 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 195     pthread_mutex_unlock( &once_mutex );
 196 #elif defined( HAVE_CTHREADS_H )
 197     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 198 #endif
 199
 200     if( i_status != VLC_THREADS_READY )
 201     {
 202         return VLC_ETHREAD;
 203     }
 204
 205     return i_ret;
 206 }
 207
 208 /*****************************************************************************
 209  * vlc_threads_end: stop threads system
 210  *****************************************************************************
 211  * FIXME: This function is far from being threadsafe.
 212  *****************************************************************************/
 213 int __vlc_threads_end( vlc_object_t *p_this )
 214 {
 215     (void)p_this;
 216 #if defined( PTH_INIT_IN_PTH_H )
 217 #elif defined( ST_INIT_IN_ST_H )
 218 #elif defined( UNDER_CE )
 219 #elif defined( WIN32 )
 220 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 221 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 222     pthread_mutex_lock( &once_mutex );
 223 #elif defined( HAVE_CTHREADS_H )
 224 #endif
 225
 226     if( i_initializations == 0 )
 227         return VLC_EGENERIC;
 228
 229     i_initializations--;
 230     if( i_initializations == 0 )
 231     {
 232         i_status = VLC_THREADS_UNINITIALIZED;
 233         vlc_object_destroy( p_root );
 234     }
 235
 236 #if defined( PTH_INIT_IN_PTH_H )
 237     if( i_initializations == 0 )
 238     {
 239         return ( pth_kill() == FALSE );
 240     }
 241
 242 #elif defined( ST_INIT_IN_ST_H )
 243 #elif defined( UNDER_CE )
 244 #elif defined( WIN32 )
 245 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 246 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 247     pthread_mutex_unlock( &once_mutex );
 248 #elif defined( HAVE_CTHREADS_H )
 249 #endif
 250     return VLC_SUCCESS;
 251 }
 252
 253 /*****************************************************************************
 254  * vlc_mutex_init: initialize a mutex
 255  *****************************************************************************/
 256 int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 257 {
 258     assert( p_this );
 259     p_mutex->p_this = p_this;
 260
 261 #if defined( PTH_INIT_IN_PTH_H )
 262     return ( pth_mutex_init( &p_mutex->mutex ) == FALSE );
 263
 264 #elif defined( ST_INIT_IN_ST_H )
 265     p_mutex->mutex = st_mutex_new();
 266     return ( p_mutex->mutex == NULL ) ? errno : 0;
 267
 268 #elif defined( UNDER_CE )
 269     InitializeCriticalSection( &p_mutex->csection );
 270     return 0;
 271
 272 #elif defined( WIN32 )
 273     /* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
 274      * function and have a 100% correct vlc_cond_wait() implementation.
 275      * As this function is not available on Win9x, we can use the faster
 276      * CriticalSections */
 277     if( pf_SignalObjectAndWait && !b_fast_mutex )
 278     {
 279         /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 280         p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
 281         return ( p_mutex->mutex != NULL ? 0 : 1 );
 282     }
 283     else
 284     {
 285         p_mutex->mutex = NULL;
 286         InitializeCriticalSection( &p_mutex->csection );
 287         return 0;
 288     }
 289
 290 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 291     /* check the arguments and whether it's already been initialized */
 292     if( p_mutex == NULL )
 293     {
 294         return B_BAD_VALUE;
 295     }
 296
 297     if( p_mutex->init == 9999 )
 298     {
 299         return EALREADY;
 300     }
 301
 302     p_mutex->lock = create_sem( 1, "BeMutex" );
 303     if( p_mutex->lock < B_NO_ERROR )
 304     {
 305         return( -1 );
 306     }
 307
 308     p_mutex->init = 9999;
 309     return B_OK;
 310
 311 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 312 # if defined(DEBUG)
 313     {
 314         /* Create error-checking mutex to detect problems more easily. */
 315         pthread_mutexattr_t attr;
 316         int                 i_result;
 317
 318         pthread_mutexattr_init( &attr );
 319 #   if defined(SYS_LINUX)
 320         pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 321 #   else
 322         pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
 323 #   endif
 324         i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 325         pthread_mutexattr_destroy( &attr );
 326         return( i_result );
 327     }
 328 # endif
 329     return pthread_mutex_init( &p_mutex->mutex, NULL );
 330
 331 #elif defined( HAVE_CTHREADS_H )
 332     mutex_init( p_mutex );
 333     return 0;
 334
 335 #endif
 336 }
 337
 338 /*****************************************************************************
 339  * vlc_mutex_destroy: destroy a mutex, inner version
 340  *****************************************************************************/
 341 int __vlc_mutex_destroy( const char * psz_file, int i_line, vlc_mutex_t *p_mutex )
 342 {
 343     int i_result;
 344     /* In case of error : */
 345     int i_thread = -1;
 346
 347 #if defined( PTH_INIT_IN_PTH_H )
 348     return 0;
 349
 350 #elif defined( ST_INIT_IN_ST_H )
 351     i_result = st_mutex_destroy( p_mutex->mutex );
 352
 353 #elif defined( UNDER_CE )
 354     DeleteCriticalSection( &p_mutex->csection );
 355     return 0;
 356
 357 #elif defined( WIN32 )
 358     if( p_mutex->mutex )
 359     {
 360         CloseHandle( p_mutex->mutex );
 361     }
 362     else
 363     {
 364         DeleteCriticalSection( &p_mutex->csection );
 365     }
 366     return 0;
 367
 368 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 369     if( p_mutex->init == 9999 )
 370     {
 371         delete_sem( p_mutex->lock );
 372     }
 373
 374     p_mutex->init = 0;
 375     return B_OK;
 376
 377 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 378     i_result = pthread_mutex_destroy( &p_mutex->mutex );
 379     if( i_result )
 380     {
 381         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 382         errno = i_result;
 383     }
 384
 385 #elif defined( HAVE_CTHREADS_H )
 386     return 0;
 387
 388 #endif
 389
 390     if( i_result )
 391     {
 392         msg_Err( p_mutex->p_this,
 393                  "thread %d: mutex_destroy failed at %s:%d (%d:%m)",
 394                  i_thread, psz_file, i_line, i_result );
 395         vlc_threads_error( p_mutex->p_this );
 396     }
 397     return i_result;
 398 }
 399
 400 /*****************************************************************************
 401  * vlc_cond_init: initialize a condition
 402  *****************************************************************************/
 403 int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar )
 404 {
 405     p_condvar->p_this = p_this;
 406
 407 #if defined( PTH_INIT_IN_PTH_H )
 408     return ( pth_cond_init( &p_condvar->cond ) == FALSE );
 409
 410 #elif defined( ST_INIT_IN_ST_H )
 411     p_condvar->cond = st_cond_new();
 412     return ( p_condvar->cond == NULL ) ? errno : 0;
 413
 414 #elif defined( UNDER_CE )
 415     /* Initialize counter */
 416     p_condvar->i_waiting_threads = 0;
 417
 418     /* Create an auto-reset event. */
 419     p_condvar->event = CreateEvent( NULL,   /* no security */
 420                                     FALSE,  /* auto-reset event */
 421                                     FALSE,  /* start non-signaled */
 422                                     NULL ); /* unnamed */
 423     return !p_condvar->event;
 424
 425 #elif defined( WIN32 )
 426     /* Initialize counter */
 427     p_condvar->i_waiting_threads = 0;
 428
 429     /* Misc init */
 430     p_condvar->i_win9x_cv = i_win9x_cv;
 431     p_condvar->SignalObjectAndWait = pf_SignalObjectAndWait;
 432
 433     if( (p_condvar->SignalObjectAndWait && !b_fast_mutex)
 434         || p_condvar->i_win9x_cv == 0 )
 435     {
 436         /* Create an auto-reset event. */
 437         p_condvar->event = CreateEvent( NULL,   /* no security */
 438                                         FALSE,  /* auto-reset event */
 439                                         FALSE,  /* start non-signaled */
 440                                         NULL ); /* unnamed */
 441
 442         p_condvar->semaphore = NULL;
 443         return !p_condvar->event;
 444     }
 445     else
 446     {
 447         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
 448                                                 0,          /* initial count */
 449                                                 0x7fffffff, /* max count */
 450                                                 NULL );     /* unnamed */
 451
 452         if( p_condvar->i_win9x_cv == 1 )
 453             /* Create a manual-reset event initially signaled. */
 454             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
 455         else
 456             /* Create a auto-reset event. */
 457             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
 458
 459         InitializeCriticalSection( &p_condvar->csection );
 460
 461         return !p_condvar->semaphore || !p_condvar->event;
 462     }
 463
 464 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 465     if( !p_condvar )
 466     {
 467         return B_BAD_VALUE;
 468     }
 469
 470     if( p_condvar->init == 9999 )
 471     {
 472         return EALREADY;
 473     }
 474
 475     p_condvar->thread = -1;
 476     p_condvar->init = 9999;
 477     return 0;
 478
 479 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 480     pthread_condattr_t attr;
 481     int ret;
 482
 483     ret = pthread_condattr_init (&attr);
 484     if (ret)
 485         return ret;
 486
 487 # if !defined (_POSIX_CLOCK_SELECTION)
 488    /* Fairly outdated POSIX support (that was defined in 2001) */
 489 #  define _POSIX_CLOCK_SELECTION (-1)
 490 # endif
 491 # if (_POSIX_CLOCK_SELECTION >= 0)
 492     /* NOTE: This must be the same clock as the one in mtime.c */
 493     pthread_condattr_setclock (&attr, CLOCK_MONOTONIC);
 494 # endif
 495
 496     ret = pthread_cond_init (&p_condvar->cond, &attr);
 497     pthread_condattr_destroy (&attr);
 498     return ret;
 499
 500 #elif defined( HAVE_CTHREADS_H )
 501     /* condition_init() */
 502     spin_lock_init( &p_condvar->lock );
 503     cthread_queue_init( &p_condvar->queue );
 504     p_condvar->name = 0;
 505     p_condvar->implications = 0;
 506
 507     return 0;
 508
 509 #endif
 510 }
 511
 512 /*****************************************************************************
 513  * vlc_cond_destroy: destroy a condition, inner version
 514  *****************************************************************************/
 515 int __vlc_cond_destroy( const char * psz_file, int i_line, vlc_cond_t *p_condvar )
 516 {
 517     int i_result;
 518     /* In case of error : */
 519     int i_thread = -1;
 520
 521 #if defined( PTH_INIT_IN_PTH_H )
 522     return 0;
 523
 524 #elif defined( ST_INIT_IN_ST_H )
 525     i_result = st_cond_destroy( p_condvar->cond );
 526
 527 #elif defined( UNDER_CE )
 528     i_result = !CloseHandle( p_condvar->event );
 529
 530 #elif defined( WIN32 )
 531     if( !p_condvar->semaphore )
 532         i_result = !CloseHandle( p_condvar->event );
 533     else
 534         i_result = !CloseHandle( p_condvar->event )
 535           || !CloseHandle( p_condvar->semaphore );
 536
 537     if( p_condvar->semaphore != NULL )
 538         DeleteCriticalSection( &p_condvar->csection );
 539
 540 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 541     p_condvar->init = 0;
 542     return 0;
 543
 544 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 545     i_result = pthread_cond_destroy( &p_condvar->cond );
 546     if( i_result )
 547     {
 548         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 549         errno = i_result;
 550     }
 551
 552 #elif defined( HAVE_CTHREADS_H )
 553     return 0;
 554
 555 #endif
 556
 557     if( i_result )
 558     {
 559         msg_Err( p_condvar->p_this,
 560                  "thread %d: cond_destroy failed at %s:%d (%d:%m)",
 561                  i_thread, psz_file, i_line, i_result );
 562         vlc_threads_error( p_condvar->p_this );
 563     }
 564     return i_result;
 565 }
 566
 567 /*****************************************************************************
 568  * vlc_tls_create: create a thread-local variable
 569  *****************************************************************************/
 570 int __vlc_threadvar_create( vlc_object_t *p_this, vlc_threadvar_t *p_tls )
 571 {
 572     int i_ret = -1;
 573     (void)p_this;
 574 #if defined( PTH_INIT_IN_PTH_H )
 575     i_ret = pth_key_create( &p_tls->handle, NULL );
 576 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 577     msg_Err( p_this, "TLS not implemented" );
 578     i_ret VLC_EGENERIC;
 579 #elif defined( ST_INIT_IN_ST_H )
 580     i_ret = st_key_create( &p_tls->handle, NULL );
 581 #elif defined( UNDER_CE ) || defined( WIN32 )
 582 #elif defined( WIN32 )
 583     p_tls->handle = TlsAlloc();
 584     i_ret = !( p_tls->handle == 0xFFFFFFFF );
 585
 586 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 587     i_ret =  pthread_key_create( &p_tls->handle, NULL );
 588 #elif defined( HAVE_CTHREADS_H )
 589     i_ret = cthread_keycreate( &p_tls-handle );
 590 #endif
 591     return i_ret;
 592 }
 593
 594 /*****************************************************************************
 595  * vlc_thread_create: create a thread, inner version
 596  *****************************************************************************
 597  * Note that i_priority is only taken into account on platforms supporting
 598  * userland real-time priority threads.
 599  *****************************************************************************/
 600 int __vlc_thread_create( vlc_object_t *p_this, const char * psz_file, int i_line,
 601                          const char *psz_name, void * ( *func ) ( void * ),
 602                          int i_priority, vlc_bool_t b_wait )
 603 {
 604     int i_ret;
 605     void *p_data = (void *)p_this;
 606     vlc_object_internals_t *p_priv = p_this->p_internals;
 607
 608     vlc_mutex_lock( &p_this->object_lock );
 609
 610 #if defined( PTH_INIT_IN_PTH_H )
 611     p_priv->thread_id = pth_spawn( PTH_ATTR_DEFAULT, func, p_data );
 612     i_ret = p_priv->thread_id == NULL;
 613
 614 #elif defined( ST_INIT_IN_ST_H )
 615     p_priv->thread_id = st_thread_create( func, p_data, 1, 0 );
 616     i_ret = 0;
 617
 618 #elif defined( WIN32 ) || defined( UNDER_CE )
 619     {
 620         /* When using the MSVCRT C library you have to use the _beginthreadex
 621          * function instead of CreateThread, otherwise you'll end up with
 622          * memory leaks and the signal functions not working (see Microsoft
 623          * Knowledge Base, article 104641) */
 624 #if defined( UNDER_CE )
 625         DWORD  threadId;
 626         HANDLE hThread = CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE)func,
 627                                       (LPVOID)p_data, CREATE_SUSPENDED,
 628                       &threadId );
 629 #else
 630         unsigned threadId;
 631         uintptr_t hThread = _beginthreadex( NULL, 0,
 632                         (LPTHREAD_START_ROUTINE)func,
 633                                             (void*)p_data, CREATE_SUSPENDED,
 634                         &threadId );
 635 #endif
 636         p_priv->thread_id.id = (DWORD)threadId;
 637         p_priv->thread_id.hThread = (HANDLE)hThread;
 638     ResumeThread((HANDLE)hThread);
 639     }
 640
 641     i_ret = ( p_priv->thread_id.hThread ? 0 : 1 );
 642
 643     if( i_ret && i_priority )
 644     {
 645         if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
 646         {
 647             msg_Warn( p_this, "couldn't set a faster priority" );
 648             i_priority = 0;
 649         }
 650     }
 651
 652 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 653     p_priv->thread_id = spawn_thread( (thread_func)func, psz_name,
 654                                       i_priority, p_data );
 655     i_ret = resume_thread( p_priv->thread_id );
 656
 657 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 658     i_ret = pthread_create( &p_priv->thread_id, NULL, func, p_data );
 659
 660 #ifndef __APPLE__
 661     if( config_GetInt( p_this, "rt-priority" ) )
 662 #endif
 663     {
 664         int i_error, i_policy;
 665         struct sched_param param;
 666
 667         memset( &param, 0, sizeof(struct sched_param) );
 668         if( config_GetType( p_this, "rt-offset" ) )
 669         {
 670             i_priority += config_GetInt( p_this, "rt-offset" );
 671         }
 672         if( i_priority <= 0 )
 673         {
 674             param.sched_priority = (-1) * i_priority;
 675             i_policy = SCHED_OTHER;
 676         }
 677         else
 678         {
 679             param.sched_priority = i_priority;
 680             i_policy = SCHED_RR;
 681         }
 682         if( (i_error = pthread_setschedparam( p_priv->thread_id,
 683                                                i_policy, &param )) )
 684         {
 685             errno = i_error;
 686             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %m",
 687                       psz_file, i_line );
 688             i_priority = 0;
 689         }
 690     }
 691 #ifndef __APPLE__
 692     else
 693     {
 694         i_priority = 0;
 695     }
 696 #endif
 697
 698 #elif defined( HAVE_CTHREADS_H )
 699     p_priv->thread_id = cthread_fork( (cthread_fn_t)func, (any_t)p_data );
 700     i_ret = 0;
 701
 702 #endif
 703
 704     if( i_ret == 0 )
 705     {
 706         if( b_wait )
 707         {
 708             msg_Dbg( p_this, "waiting for thread completion" );
 709             vlc_object_wait( p_this );
 710         }
 711
 712         p_priv->b_thread = VLC_TRUE;
 713
 714 #if defined( WIN32 ) || defined( UNDER_CE )
 715         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 716                  (unsigned int)p_priv->thread_id.id, psz_name,
 717          i_priority, psz_file, i_line );
 718 #else
 719         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 720                  (unsigned int)p_priv->thread_id, psz_name, i_priority,
 721                  psz_file, i_line );
 722 #endif
 723
 724
 725         vlc_mutex_unlock( &p_this->object_lock );
 726     }
 727     else
 728     {
 729         errno = i_ret;
 730         msg_Err( p_this, "%s thread could not be created at %s:%d (%m)",
 731                          psz_name, psz_file, i_line );
 732         vlc_threads_error( p_this );
 733         vlc_mutex_unlock( &p_this->object_lock );
 734     }
 735
 736     return i_ret;
 737 }
 738
 739 /*****************************************************************************
 740  * vlc_thread_set_priority: set the priority of the current thread when we
 741  * couldn't set it in vlc_thread_create (for instance for the main thread)
 742  *****************************************************************************/
 743 int __vlc_thread_set_priority( vlc_object_t *p_this, const char * psz_file,
 744                                int i_line, int i_priority )
 745 {
 746     vlc_object_internals_t *p_priv = p_this->p_internals;
 747 #if defined( PTH_INIT_IN_PTH_H ) || defined( ST_INIT_IN_ST_H )
 748 #elif defined( WIN32 ) || defined( UNDER_CE )
 749     if( !p_priv->thread_id.hThread )
 750         p_priv->thread_id.hThread = GetCurrentThread();
 751     if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
 752     {
 753         msg_Warn( p_this, "couldn't set a faster priority" );
 754         return 1;
 755     }
 756
 757 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 758 # ifndef __APPLE__
 759     if( config_GetInt( p_this, "rt-priority" ) > 0 )
 760 # endif
 761     {
 762         int i_error, i_policy;
 763         struct sched_param param;
 764
 765         memset( &param, 0, sizeof(struct sched_param) );
 766         if( config_GetType( p_this, "rt-offset" ) )
 767         {
 768             i_priority += config_GetInt( p_this, "rt-offset" );
 769         }
 770         if( i_priority <= 0 )
 771         {
 772             param.sched_priority = (-1) * i_priority;
 773             i_policy = SCHED_OTHER;
 774         }
 775         else
 776         {
 777             param.sched_priority = i_priority;
 778             i_policy = SCHED_RR;
 779         }
 780         if( !p_priv->thread_id )
 781             p_priv->thread_id = pthread_self();
 782         if( (i_error = pthread_setschedparam( p_priv->thread_id,
 783                                                i_policy, &param )) )
 784         {
 785             errno = i_error;
 786             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %m",
 787                       psz_file, i_line );
 788             i_priority = 0;
 789         }
 790     }
 791 #endif
 792
 793     return 0;
 794 }
 795
 796 /*****************************************************************************
 797  * vlc_thread_ready: tell the parent thread we were successfully spawned
 798  *****************************************************************************/
 799 void __vlc_thread_ready( vlc_object_t *p_this )
 800 {
 801     vlc_object_signal( p_this );
 802 }
 803
 804 /*****************************************************************************
 805  * vlc_thread_join: wait until a thread exits, inner version
 806  *****************************************************************************/
 807 void __vlc_thread_join( vlc_object_t *p_this, const char * psz_file, int i_line )
 808 {
 809     vlc_object_internals_t *p_priv = p_this->p_internals;
 810
 811 #if defined( UNDER_CE ) || defined( WIN32 )
 812     HMODULE hmodule;
 813     BOOL (WINAPI *OurGetThreadTimes)( HANDLE, FILETIME*, FILETIME*,
 814                                       FILETIME*, FILETIME* );
 815     FILETIME create_ft, exit_ft, kernel_ft, user_ft;
 816     int64_t real_time, kernel_time, user_time;
 817     HANDLE hThread;
 818
 819     /*
 820     ** object will close its thread handle when destroyed, duplicate it here
 821     ** to be on the safe side
 822     */
 823     if( ! DuplicateHandle(GetCurrentProcess(),
 824             p_priv->thread_id.hThread,
 825             GetCurrentProcess(),
 826             &hThread,
 827             0,
 828             FALSE,
 829             DUPLICATE_SAME_ACCESS) )
 830     {
 831         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%s)",
 832                          (unsigned int)p_priv->thread_id.id,
 833              psz_file, i_line, GetLastError() );
 834         vlc_threads_error( p_this );
 835         p_priv->b_thread = VLC_FALSE;
 836         return;
 837     }
 838
 839     WaitForSingleObject( hThread, INFINITE );
 840
 841     msg_Dbg( p_this, "thread %u joined (%s:%d)",
 842              (unsigned int)p_priv->thread_id.id,
 843              psz_file, i_line );
 844 #if defined( UNDER_CE )
 845     hmodule = GetModuleHandle( _T("COREDLL") );
 846 #else
 847     hmodule = GetModuleHandle( _T("KERNEL32") );
 848 #endif
 849     OurGetThreadTimes = (BOOL (WINAPI*)( HANDLE, FILETIME*, FILETIME*,
 850                                          FILETIME*, FILETIME* ))
 851         GetProcAddress( hmodule, _T("GetThreadTimes") );
 852
 853     if( OurGetThreadTimes &&
 854         OurGetThreadTimes( hThread,
 855                            &create_ft, &exit_ft, &kernel_ft, &user_ft ) )
 856     {
 857         real_time =
 858           ((((int64_t)exit_ft.dwHighDateTime)<<32)| exit_ft.dwLowDateTime) -
 859           ((((int64_t)create_ft.dwHighDateTime)<<32)| create_ft.dwLowDateTime);
 860         real_time /= 10;
 861
 862         kernel_time =
 863           ((((int64_t)kernel_ft.dwHighDateTime)<<32)|
 864            kernel_ft.dwLowDateTime) / 10;
 865
 866         user_time =
 867           ((((int64_t)user_ft.dwHighDateTime)<<32)|
 868            user_ft.dwLowDateTime) / 10;
 869
 870         msg_Dbg( p_this, "thread times: "
 871                  "real "I64Fd"m%fs, kernel "I64Fd"m%fs, user "I64Fd"m%fs",
 872                  real_time/60/1000000,
 873                  (double)((real_time%(60*1000000))/1000000.0),
 874                  kernel_time/60/1000000,
 875                  (double)((kernel_time%(60*1000000))/1000000.0),
 876                  user_time/60/1000000,
 877                  (double)((user_time%(60*1000000))/1000000.0) );
 878     }
 879     CloseHandle( hThread );
 880
 881 #else /* !defined(WIN32) */
 882
 883     int i_ret = 0;
 884
 885 #if defined( PTH_INIT_IN_PTH_H )
 886     i_ret = ( pth_join( p_priv->thread_id, NULL ) == FALSE );
 887
 888 #elif defined( ST_INIT_IN_ST_H )
 889     i_ret = st_thread_join( p_priv->thread_id, NULL );
 890
 891 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 892     int32_t exit_value;
 893     i_ret = (B_OK == wait_for_thread( p_priv->thread_id, &exit_value ));
 894
 895 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 896     i_ret = pthread_join( p_priv->thread_id, NULL );
 897
 898 #elif defined( HAVE_CTHREADS_H )
 899     cthread_join( p_priv->thread_id );
 900     i_ret = 1;
 901
 902 #endif
 903
 904     if( i_ret )
 905     {
 906         errno = i_ret;
 907         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%m)",
 908                          (unsigned int)p_priv->thread_id, psz_file, i_line );
 909         vlc_threads_error( p_this );
 910     }
 911     else
 912     {
 913         msg_Dbg( p_this, "thread %u joined (%s:%d)",
 914                          (unsigned int)p_priv->thread_id, psz_file, i_line );
 915     }
 916
 917 #endif
 918
 919     p_priv->b_thread = VLC_FALSE;
 920 }
 921