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( UNDER_CE )
  48 #elif defined( WIN32 )
  49
  50 /* following is only available on NT/2000/XP and above */
  51 static SIGNALOBJECTANDWAIT pf_SignalObjectAndWait = NULL;
  52
  53 /*
  54 ** On Windows NT/2K/XP we use a slow mutex implementation but which
  55 ** allows us to correctly implement condition variables.
  56 ** You can also use the faster Win9x implementation but you might
  57 ** experience problems with it.
  58 */
  59 static vlc_bool_t          b_fast_mutex = VLC_FALSE;
  60 /*
  61 ** On Windows 9x/Me you can use a fast but incorrect condition variables
  62 ** implementation (more precisely there is a possibility for a race
  63 ** condition to happen).
  64 ** However it is possible to use slower alternatives which are more robust.
  65 ** Currently you can choose between implementation 0 (which is the
  66 ** fastest but slightly incorrect), 1 (default) and 2.
  67 */
  68 static int i_win9x_cv = 1;
  69
  70 #elif defined( HAVE_KERNEL_SCHEDULER_H )
  71 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
  72 static pthread_mutex_t once_mutex = PTHREAD_MUTEX_INITIALIZER;
  73 #elif defined( HAVE_CTHREADS_H )
  74 #endif
  75
  76 vlc_threadvar_t msg_context_global_key;
  77
  78 #ifndef NDEBUG
  79 /*****************************************************************************
  80  * vlc_threads_error: Report an error from the threading mecanism
  81  *****************************************************************************
  82  * This is especially useful to debug those errors, as this is a nice symbol
  83  * on which you can break.
  84  *****************************************************************************/
  85 void vlc_threads_error( vlc_object_t *p_this )
  86 {
  87      msg_Err( p_this, "Error detected. Put a breakpoint in '%s' to debug.",
  88             __func__ );
  89 }
  90 #endif
  91
  92 /*****************************************************************************
  93  * vlc_threads_init: initialize threads system
  94  *****************************************************************************
  95  * This function requires lazy initialization of a global lock in order to
  96  * keep the library really thread-safe. Some architectures don't support this
  97  * and thus do not guarantee the complete reentrancy.
  98  *****************************************************************************/
  99 int __vlc_threads_init( vlc_object_t *p_this )
 100 {
 101     libvlc_global_data_t *p_libvlc_global = (libvlc_global_data_t *)p_this;
 102     int i_ret = VLC_SUCCESS;
 103
 104     /* If we have lazy mutex initialization, use it. Otherwise, we just
 105      * hope nothing wrong happens. */
 106 #if defined( UNDER_CE )
 107 #elif defined( WIN32 )
 108     if( IsDebuggerPresent() )
 109     {
 110         /* SignalObjectAndWait() is problematic under a debugger */
 111         b_fast_mutex = VLC_TRUE;
 112         i_win9x_cv = 1;
 113     }
 114 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 115 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 116     pthread_mutex_lock( &once_mutex );
 117 #elif defined( HAVE_CTHREADS_H )
 118 #endif
 119
 120     if( i_status == VLC_THREADS_UNINITIALIZED )
 121     {
 122         i_status = VLC_THREADS_PENDING;
 123
 124         /* We should be safe now. Do all the initialization stuff we want. */
 125         p_libvlc_global->b_ready = VLC_FALSE;
 126
 127 #if defined( UNDER_CE )
 128         /* Nothing to initialize */
 129
 130 #elif defined( WIN32 )
 131         /* Dynamically get the address of SignalObjectAndWait */
 132         if( GetVersion() < 0x80000000 )
 133         {
 134             HINSTANCE hInstLib;
 135
 136             /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 137             hInstLib = LoadLibrary( "kernel32" );
 138             if( hInstLib )
 139             {
 140                 pf_SignalObjectAndWait =
 141                     (SIGNALOBJECTANDWAIT)GetProcAddress( hInstLib,
 142                                                      "SignalObjectAndWait" );
 143             }
 144         }
 145
 146 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 147 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 148 #elif defined( HAVE_CTHREADS_H )
 149 #endif
 150
 151         p_root = vlc_object_create( p_libvlc_global, VLC_OBJECT_GLOBAL );
 152         if( p_root == NULL )
 153             i_ret = VLC_ENOMEM;
 154
 155         if( i_ret )
 156         {
 157             i_status = VLC_THREADS_ERROR;
 158         }
 159         else
 160         {
 161             i_initializations++;
 162             i_status = VLC_THREADS_READY;
 163         }
 164
 165         vlc_threadvar_create( p_root, &msg_context_global_key );
 166     }
 167     else
 168     {
 169         /* Just increment the initialization count */
 170         i_initializations++;
 171     }
 172
 173     /* If we have lazy mutex initialization support, unlock the mutex;
 174      * otherwize, do a naive wait loop. */
 175 #if 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( UNDER_CE )
 204 #elif defined( WIN32 )
 205 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 206 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 207     pthread_mutex_lock( &once_mutex );
 208 #elif defined( HAVE_CTHREADS_H )
 209 #endif
 210
 211     if( i_initializations == 0 )
 212         return VLC_EGENERIC;
 213
 214     i_initializations--;
 215     if( i_initializations == 0 )
 216     {
 217         i_status = VLC_THREADS_UNINITIALIZED;
 218         vlc_object_destroy( p_root );
 219     }
 220
 221 #if defined( UNDER_CE )
 222 #elif defined( WIN32 )
 223 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 224 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 225     pthread_mutex_unlock( &once_mutex );
 226 #elif defined( HAVE_CTHREADS_H )
 227 #endif
 228     return VLC_SUCCESS;
 229 }
 230
 231 /*****************************************************************************
 232  * vlc_mutex_init: initialize a mutex
 233  *****************************************************************************/
 234 int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 235 {
 236     assert( p_this );
 237     p_mutex->p_this = p_this;
 238
 239 #if defined( UNDER_CE )
 240     InitializeCriticalSection( &p_mutex->csection );
 241     return 0;
 242
 243 #elif defined( WIN32 )
 244     /* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
 245      * function and have a 100% correct vlc_cond_wait() implementation.
 246      * As this function is not available on Win9x, we can use the faster
 247      * CriticalSections */
 248     if( pf_SignalObjectAndWait && !b_fast_mutex )
 249     {
 250         /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 251         p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
 252         return ( p_mutex->mutex != NULL ? 0 : 1 );
 253     }
 254     else
 255     {
 256         p_mutex->mutex = NULL;
 257         InitializeCriticalSection( &p_mutex->csection );
 258         return 0;
 259     }
 260
 261 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 262     /* check the arguments and whether it's already been initialized */
 263     if( p_mutex == NULL )
 264     {
 265         return B_BAD_VALUE;
 266     }
 267
 268     if( p_mutex->init == 9999 )
 269     {
 270         return EALREADY;
 271     }
 272
 273     p_mutex->lock = create_sem( 1, "BeMutex" );
 274     if( p_mutex->lock < B_NO_ERROR )
 275     {
 276         return( -1 );
 277     }
 278
 279     p_mutex->init = 9999;
 280     return B_OK;
 281
 282 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 283 # if defined(DEBUG)
 284     {
 285         /* Create error-checking mutex to detect problems more easily. */
 286         pthread_mutexattr_t attr;
 287         int                 i_result;
 288
 289         pthread_mutexattr_init( &attr );
 290 #   if defined(SYS_LINUX)
 291         pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 292 #   else
 293         pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
 294 #   endif
 295
 296         i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 297         pthread_mutexattr_destroy( &attr );
 298         return( i_result );
 299     }
 300 # endif
 301     return pthread_mutex_init( &p_mutex->mutex, NULL );
 302
 303 #elif defined( HAVE_CTHREADS_H )
 304     mutex_init( p_mutex );
 305     return 0;
 306
 307 #endif
 308 }
 309
 310 /*****************************************************************************
 311  * vlc_mutex_init: initialize a recursive mutex (Do not use)
 312  *****************************************************************************/
 313 int __vlc_mutex_init_recursive( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 314 {
 315 #if defined( WIN32 )
 316     /* Create mutex returns a recursive mutex */
 317     p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
 318     return ( p_mutex->mutex != NULL ? 0 : 1 );
 319 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 320     pthread_mutexattr_t attr;
 321     int                 i_result;
 322
 323     pthread_mutexattr_init( &attr );
 324 # if defined(DEBUG)
 325     /* Create error-checking mutex to detect problems more easily. */
 326 #   if defined(SYS_LINUX)
 327     pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 328 #   else
 329     pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
 330 #   endif
 331 # endif
 332     pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_RECURSIVE );
 333     i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 334     pthread_mutexattr_destroy( &attr );
 335     return( i_result );
 336 #else
 337     msg_Err(p_this, "no recursive mutex found. Falling back to regular mutex.\n"
 338                     "Expect hangs\n")
 339     return __vlc_mutex_init( p_this, p_mutex );
 340 #endif
 341 }
 342
 343
 344 /*****************************************************************************
 345  * vlc_mutex_destroy: destroy a mutex, inner version
 346  *****************************************************************************/
 347 int __vlc_mutex_destroy( const char * psz_file, int i_line, vlc_mutex_t *p_mutex )
 348 {
 349     int i_result;
 350     /* In case of error : */
 351     int i_thread = -1;
 352
 353 #if 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( UNDER_CE )
 408     /* Initialize counter */
 409     p_condvar->i_waiting_threads = 0;
 410
 411     /* Create an auto-reset event. */
 412     p_condvar->event = CreateEvent( NULL,   /* no security */
 413                                     FALSE,  /* auto-reset event */
 414                                     FALSE,  /* start non-signaled */
 415                                     NULL ); /* unnamed */
 416     return !p_condvar->event;
 417
 418 #elif defined( WIN32 )
 419     /* Initialize counter */
 420     p_condvar->i_waiting_threads = 0;
 421
 422     /* Misc init */
 423     p_condvar->i_win9x_cv = i_win9x_cv;
 424     p_condvar->SignalObjectAndWait = pf_SignalObjectAndWait;
 425
 426     if( (p_condvar->SignalObjectAndWait && !b_fast_mutex)
 427         || p_condvar->i_win9x_cv == 0 )
 428     {
 429         /* Create an auto-reset event. */
 430         p_condvar->event = CreateEvent( NULL,   /* no security */
 431                                         FALSE,  /* auto-reset event */
 432                                         FALSE,  /* start non-signaled */
 433                                         NULL ); /* unnamed */
 434
 435         p_condvar->semaphore = NULL;
 436         return !p_condvar->event;
 437     }
 438     else
 439     {
 440         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
 441                                                 0,          /* initial count */
 442                                                 0x7fffffff, /* max count */
 443                                                 NULL );     /* unnamed */
 444
 445         if( p_condvar->i_win9x_cv == 1 )
 446             /* Create a manual-reset event initially signaled. */
 447             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
 448         else
 449             /* Create a auto-reset event. */
 450             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
 451
 452         InitializeCriticalSection( &p_condvar->csection );
 453
 454         return !p_condvar->semaphore || !p_condvar->event;
 455     }
 456
 457 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 458     if( !p_condvar )
 459     {
 460         return B_BAD_VALUE;
 461     }
 462
 463     if( p_condvar->init == 9999 )
 464     {
 465         return EALREADY;
 466     }
 467
 468     p_condvar->thread = -1;
 469     p_condvar->init = 9999;
 470     return 0;
 471
 472 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 473     pthread_condattr_t attr;
 474     int ret;
 475
 476     ret = pthread_condattr_init (&attr);
 477     if (ret)
 478         return ret;
 479
 480 # if !defined (_POSIX_CLOCK_SELECTION)
 481    /* Fairly outdated POSIX support (that was defined in 2001) */
 482 #  define _POSIX_CLOCK_SELECTION (-1)
 483 # endif
 484 # if (_POSIX_CLOCK_SELECTION >= 0)
 485     /* NOTE: This must be the same clock as the one in mtime.c */
 486     pthread_condattr_setclock (&attr, CLOCK_MONOTONIC);
 487 # endif
 488
 489     ret = pthread_cond_init (&p_condvar->cond, &attr);
 490     pthread_condattr_destroy (&attr);
 491     return ret;
 492
 493 #elif defined( HAVE_CTHREADS_H )
 494     /* condition_init() */
 495     spin_lock_init( &p_condvar->lock );
 496     cthread_queue_init( &p_condvar->queue );
 497     p_condvar->name = 0;
 498     p_condvar->implications = 0;
 499
 500     return 0;
 501
 502 #endif
 503 }
 504
 505 /*****************************************************************************
 506  * vlc_cond_destroy: destroy a condition, inner version
 507  *****************************************************************************/
 508 int __vlc_cond_destroy( const char * psz_file, int i_line, vlc_cond_t *p_condvar )
 509 {
 510     int i_result;
 511     /* In case of error : */
 512     int i_thread = -1;
 513
 514 #if defined( UNDER_CE )
 515     i_result = !CloseHandle( p_condvar->event );
 516
 517 #elif defined( WIN32 )
 518     if( !p_condvar->semaphore )
 519         i_result = !CloseHandle( p_condvar->event );
 520     else
 521         i_result = !CloseHandle( p_condvar->event )
 522           || !CloseHandle( p_condvar->semaphore );
 523
 524     if( p_condvar->semaphore != NULL )
 525         DeleteCriticalSection( &p_condvar->csection );
 526
 527 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 528     p_condvar->init = 0;
 529     return 0;
 530
 531 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 532     i_result = pthread_cond_destroy( &p_condvar->cond );
 533     if( i_result )
 534     {
 535         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 536         errno = i_result;
 537     }
 538
 539 #elif defined( HAVE_CTHREADS_H )
 540     return 0;
 541
 542 #endif
 543
 544     if( i_result )
 545     {
 546         msg_Err( p_condvar->p_this,
 547                  "thread %d: cond_destroy failed at %s:%d (%d:%m)",
 548                  i_thread, psz_file, i_line, i_result );
 549         vlc_threads_error( p_condvar->p_this );
 550     }
 551     return i_result;
 552 }
 553
 554 /*****************************************************************************
 555  * vlc_tls_create: create a thread-local variable
 556  *****************************************************************************/
 557 int __vlc_threadvar_create( vlc_object_t *p_this, vlc_threadvar_t *p_tls )
 558 {
 559     int i_ret = -1;
 560     (void)p_this;
 561
 562 #if defined( HAVE_KERNEL_SCHEDULER_H )
 563     msg_Err( p_this, "TLS not implemented" );
 564     i_ret VLC_EGENERIC;
 565 #elif defined( UNDER_CE ) || defined( WIN32 )
 566 #elif defined( WIN32 )
 567     p_tls->handle = TlsAlloc();
 568     i_ret = !( p_tls->handle == 0xFFFFFFFF );
 569
 570 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 571     i_ret =  pthread_key_create( &p_tls->handle, NULL );
 572 #elif defined( HAVE_CTHREADS_H )
 573     i_ret = cthread_keycreate( &p_tls-handle );
 574 #endif
 575     return i_ret;
 576 }
 577
 578 /*****************************************************************************
 579  * vlc_thread_create: create a thread, inner version
 580  *****************************************************************************
 581  * Note that i_priority is only taken into account on platforms supporting
 582  * userland real-time priority threads.
 583  *****************************************************************************/
 584 int __vlc_thread_create( vlc_object_t *p_this, const char * psz_file, int i_line,
 585                          const char *psz_name, void * ( *func ) ( void * ),
 586                          int i_priority, vlc_bool_t b_wait )
 587 {
 588     int i_ret;
 589     void *p_data = (void *)p_this;
 590     vlc_object_internals_t *p_priv = p_this->p_internals;
 591
 592     vlc_mutex_lock( &p_this->object_lock );
 593
 594 #if defined( WIN32 ) || defined( UNDER_CE )
 595     {
 596         /* When using the MSVCRT C library you have to use the _beginthreadex
 597          * function instead of CreateThread, otherwise you'll end up with
 598          * memory leaks and the signal functions not working (see Microsoft
 599          * Knowledge Base, article 104641) */
 600 #if defined( UNDER_CE )
 601         DWORD  threadId;
 602         HANDLE hThread = CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE)func,
 603                                       (LPVOID)p_data, CREATE_SUSPENDED,
 604                       &threadId );
 605 #else
 606         unsigned threadId;
 607         uintptr_t hThread = _beginthreadex( NULL, 0,
 608                         (LPTHREAD_START_ROUTINE)func,
 609                                             (void*)p_data, CREATE_SUSPENDED,
 610                         &threadId );
 611 #endif
 612         p_priv->thread_id.id = (DWORD)threadId;
 613         p_priv->thread_id.hThread = (HANDLE)hThread;
 614     ResumeThread((HANDLE)hThread);
 615     }
 616
 617     i_ret = ( p_priv->thread_id.hThread ? 0 : 1 );
 618
 619     if( i_ret && i_priority )
 620     {
 621         if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
 622         {
 623             msg_Warn( p_this, "couldn't set a faster priority" );
 624             i_priority = 0;
 625         }
 626     }
 627
 628 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 629     p_priv->thread_id = spawn_thread( (thread_func)func, psz_name,
 630                                       i_priority, p_data );
 631     i_ret = resume_thread( p_priv->thread_id );
 632
 633 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 634     i_ret = pthread_create( &p_priv->thread_id, NULL, func, p_data );
 635
 636 #ifndef __APPLE__
 637     if( config_GetInt( p_this, "rt-priority" ) )
 638 #endif
 639     {
 640         int i_error, i_policy;
 641         struct sched_param param;
 642
 643         memset( &param, 0, sizeof(struct sched_param) );
 644         if( config_GetType( p_this, "rt-offset" ) )
 645         {
 646             i_priority += config_GetInt( p_this, "rt-offset" );
 647         }
 648         if( i_priority <= 0 )
 649         {
 650             param.sched_priority = (-1) * i_priority;
 651             i_policy = SCHED_OTHER;
 652         }
 653         else
 654         {
 655             param.sched_priority = i_priority;
 656             i_policy = SCHED_RR;
 657         }
 658         if( (i_error = pthread_setschedparam( p_priv->thread_id,
 659                                                i_policy, &param )) )
 660         {
 661             errno = i_error;
 662             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %m",
 663                       psz_file, i_line );
 664             i_priority = 0;
 665         }
 666     }
 667 #ifndef __APPLE__
 668     else
 669     {
 670         i_priority = 0;
 671     }
 672 #endif
 673
 674 #elif defined( HAVE_CTHREADS_H )
 675     p_priv->thread_id = cthread_fork( (cthread_fn_t)func, (any_t)p_data );
 676     i_ret = 0;
 677
 678 #endif
 679
 680     if( i_ret == 0 )
 681     {
 682         if( b_wait )
 683         {
 684             msg_Dbg( p_this, "waiting for thread completion" );
 685             vlc_object_wait( p_this );
 686         }
 687
 688         p_priv->b_thread = VLC_TRUE;
 689
 690 #if defined( WIN32 ) || defined( UNDER_CE )
 691         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 692                  (unsigned int)p_priv->thread_id.id, psz_name,
 693          i_priority, psz_file, i_line );
 694 #else
 695         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 696                  (unsigned int)p_priv->thread_id, psz_name, i_priority,
 697                  psz_file, i_line );
 698 #endif
 699
 700
 701         vlc_mutex_unlock( &p_this->object_lock );
 702     }
 703     else
 704     {
 705         errno = i_ret;
 706         msg_Err( p_this, "%s thread could not be created at %s:%d (%m)",
 707                          psz_name, psz_file, i_line );
 708         vlc_threads_error( p_this );
 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( WIN32 ) || defined( UNDER_CE )
 724     if( !p_priv->thread_id.hThread )
 725         p_priv->thread_id.hThread = GetCurrentThread();
 726     if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
 727     {
 728         msg_Warn( p_this, "couldn't set a faster priority" );
 729         return 1;
 730     }
 731
 732 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 733 # ifndef __APPLE__
 734     if( config_GetInt( p_this, "rt-priority" ) > 0 )
 735 # endif
 736     {
 737         int i_error, i_policy;
 738         struct sched_param param;
 739
 740         memset( &param, 0, sizeof(struct sched_param) );
 741         if( config_GetType( p_this, "rt-offset" ) )
 742         {
 743             i_priority += config_GetInt( p_this, "rt-offset" );
 744         }
 745         if( i_priority <= 0 )
 746         {
 747             param.sched_priority = (-1) * i_priority;
 748             i_policy = SCHED_OTHER;
 749         }
 750         else
 751         {
 752             param.sched_priority = i_priority;
 753             i_policy = SCHED_RR;
 754         }
 755         if( !p_priv->thread_id )
 756             p_priv->thread_id = pthread_self();
 757         if( (i_error = pthread_setschedparam( p_priv->thread_id,
 758                                                i_policy, &param )) )
 759         {
 760             errno = i_error;
 761             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %m",
 762                       psz_file, i_line );
 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         vlc_threads_error( p_this );
 810         p_priv->b_thread = VLC_FALSE;
 811         return;
 812     }
 813
 814     WaitForSingleObject( hThread, INFINITE );
 815
 816     msg_Dbg( p_this, "thread %u joined (%s:%d)",
 817              (unsigned int)p_priv->thread_id.id,
 818              psz_file, i_line );
 819 #if defined( UNDER_CE )
 820     hmodule = GetModuleHandle( _T("COREDLL") );
 821 #else
 822     hmodule = GetModuleHandle( _T("KERNEL32") );
 823 #endif
 824     OurGetThreadTimes = (BOOL (WINAPI*)( HANDLE, FILETIME*, FILETIME*,
 825                                          FILETIME*, FILETIME* ))
 826         GetProcAddress( hmodule, _T("GetThreadTimes") );
 827
 828     if( OurGetThreadTimes &&
 829         OurGetThreadTimes( hThread,
 830                            &create_ft, &exit_ft, &kernel_ft, &user_ft ) )
 831     {
 832         real_time =
 833           ((((int64_t)exit_ft.dwHighDateTime)<<32)| exit_ft.dwLowDateTime) -
 834           ((((int64_t)create_ft.dwHighDateTime)<<32)| create_ft.dwLowDateTime);
 835         real_time /= 10;
 836
 837         kernel_time =
 838           ((((int64_t)kernel_ft.dwHighDateTime)<<32)|
 839            kernel_ft.dwLowDateTime) / 10;
 840
 841         user_time =
 842           ((((int64_t)user_ft.dwHighDateTime)<<32)|
 843            user_ft.dwLowDateTime) / 10;
 844
 845         msg_Dbg( p_this, "thread times: "
 846                  "real "I64Fd"m%fs, kernel "I64Fd"m%fs, user "I64Fd"m%fs",
 847                  real_time/60/1000000,
 848                  (double)((real_time%(60*1000000))/1000000.0),
 849                  kernel_time/60/1000000,
 850                  (double)((kernel_time%(60*1000000))/1000000.0),
 851                  user_time/60/1000000,
 852                  (double)((user_time%(60*1000000))/1000000.0) );
 853     }
 854     CloseHandle( hThread );
 855
 856 #else /* !defined(WIN32) */
 857
 858     int i_ret = 0;
 859
 860 #if defined( HAVE_KERNEL_SCHEDULER_H )
 861     int32_t exit_value;
 862     i_ret = (B_OK == wait_for_thread( p_priv->thread_id, &exit_value ));
 863
 864 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 865     i_ret = pthread_join( p_priv->thread_id, NULL );
 866
 867 #elif defined( HAVE_CTHREADS_H )
 868     cthread_join( p_priv->thread_id );
 869     i_ret = 1;
 870
 871 #endif
 872
 873     if( i_ret )
 874     {
 875         errno = i_ret;
 876         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%m)",
 877                          (unsigned int)p_priv->thread_id, psz_file, i_line );
 878         vlc_threads_error( p_this );
 879     }
 880     else
 881     {
 882         msg_Dbg( p_this, "thread %u joined (%s:%d)",
 883                          (unsigned int)p_priv->thread_id, psz_file, i_line );
 884     }
 885
 886 #endif
 887
 888     p_priv->b_thread = VLC_FALSE;
 889 }
 890