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 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <vlc/vlc.h>
  32
  33 #include "libvlc.h"
  34 #include <assert.h>
  35 #ifdef HAVE_UNISTD_H
  36 # include <unistd.h>
  37 #endif
  38
  39 #define VLC_THREADS_UNINITIALIZED  0
  40 #define VLC_THREADS_PENDING        1
  41 #define VLC_THREADS_ERROR          2
  42 #define VLC_THREADS_READY          3
  43
  44 /*****************************************************************************
  45  * Global mutex for lazy initialization of the threads system
  46  *****************************************************************************/
  47 static volatile unsigned i_initializations = 0;
  48 static volatile int i_status = VLC_THREADS_UNINITIALIZED;
  49 static vlc_object_t *p_root;
  50
  51 #if defined( UNDER_CE )
  52 #elif defined( WIN32 )
  53
  54 /* following is only available on NT/2000/XP and above */
  55 static SIGNALOBJECTANDWAIT pf_SignalObjectAndWait = NULL;
  56
  57 /*
  58 ** On Windows NT/2K/XP we use a slow mutex implementation but which
  59 ** allows us to correctly implement condition variables.
  60 ** You can also use the faster Win9x implementation but you might
  61 ** experience problems with it.
  62 */
  63 static vlc_bool_t          b_fast_mutex = VLC_FALSE;
  64 /*
  65 ** On Windows 9x/Me you can use a fast but incorrect condition variables
  66 ** implementation (more precisely there is a possibility for a race
  67 ** condition to happen).
  68 ** However it is possible to use slower alternatives which are more robust.
  69 ** Currently you can choose between implementation 0 (which is the
  70 ** fastest but slightly incorrect), 1 (default) and 2.
  71 */
  72 static int i_win9x_cv = 1;
  73
  74 #elif defined( HAVE_KERNEL_SCHEDULER_H )
  75 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
  76 static pthread_mutex_t once_mutex = PTHREAD_MUTEX_INITIALIZER;
  77 #endif
  78
  79 vlc_threadvar_t msg_context_global_key;
  80
  81 #ifndef NDEBUG
  82 /*****************************************************************************
  83  * vlc_threads_error: Report an error from the threading mecanism
  84  *****************************************************************************
  85  * This is especially useful to debug those errors, as this is a nice symbol
  86  * on which you can break.
  87  *****************************************************************************/
  88 void vlc_threads_error( vlc_object_t *p_this )
  89 {
  90      msg_Err( p_this, "Error detected. Put a breakpoint in '%s' to debug.",
  91             __func__ );
  92 }
  93 #endif
  94
  95 /*****************************************************************************
  96  * vlc_threads_init: initialize threads system
  97  *****************************************************************************
  98  * This function requires lazy initialization of a global lock in order to
  99  * keep the library really thread-safe. Some architectures don't support this
 100  * and thus do not guarantee the complete reentrancy.
 101  *****************************************************************************/
 102 int __vlc_threads_init( vlc_object_t *p_this )
 103 {
 104     libvlc_global_data_t *p_libvlc_global = (libvlc_global_data_t *)p_this;
 105     int i_ret = VLC_SUCCESS;
 106
 107     /* If we have lazy mutex initialization, use it. Otherwise, we just
 108      * hope nothing wrong happens. */
 109 #if 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 #endif
 121
 122     if( i_status == VLC_THREADS_UNINITIALIZED )
 123     {
 124         i_status = VLC_THREADS_PENDING;
 125
 126         /* We should be safe now. Do all the initialization stuff we want. */
 127         p_libvlc_global->b_ready = VLC_FALSE;
 128
 129 #if defined( UNDER_CE )
 130         /* Nothing to initialize */
 131
 132 #elif defined( WIN32 )
 133         /* Dynamically get the address of SignalObjectAndWait */
 134         if( GetVersion() < 0x80000000 )
 135         {
 136             HINSTANCE hInstLib;
 137
 138             /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 139             hInstLib = LoadLibrary( "kernel32" );
 140             if( hInstLib )
 141             {
 142                 pf_SignalObjectAndWait =
 143                     (SIGNALOBJECTANDWAIT)GetProcAddress( hInstLib,
 144                                                      "SignalObjectAndWait" );
 145             }
 146         }
 147
 148 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 149 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 150 #endif
 151
 152         p_root = vlc_object_create( p_libvlc_global, VLC_OBJECT_GLOBAL );
 153         if( p_root == NULL )
 154             i_ret = VLC_ENOMEM;
 155
 156         if( i_ret )
 157         {
 158             i_status = VLC_THREADS_ERROR;
 159         }
 160         else
 161         {
 162             i_initializations++;
 163             i_status = VLC_THREADS_READY;
 164         }
 165
 166         vlc_threadvar_create( p_root, &msg_context_global_key );
 167     }
 168     else
 169     {
 170         /* Just increment the initialization count */
 171         i_initializations++;
 172     }
 173
 174     /* If we have lazy mutex initialization support, unlock the mutex;
 175      * otherwize, do a naive wait loop. */
 176 #if defined( UNDER_CE )
 177     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 178 #elif defined( WIN32 )
 179     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 180 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 181     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 182 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 183     pthread_mutex_unlock( &once_mutex );
 184 #endif
 185
 186     if( i_status != VLC_THREADS_READY )
 187     {
 188         return VLC_ETHREAD;
 189     }
 190
 191     return i_ret;
 192 }
 193
 194 /*****************************************************************************
 195  * vlc_threads_end: stop threads system
 196  *****************************************************************************
 197  * FIXME: This function is far from being threadsafe.
 198  *****************************************************************************/
 199 int __vlc_threads_end( vlc_object_t *p_this )
 200 {
 201     (void)p_this;
 202 #if defined( UNDER_CE )
 203 #elif defined( WIN32 )
 204 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 205 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 206     pthread_mutex_lock( &once_mutex );
 207 #endif
 208
 209     if( i_initializations == 0 )
 210         return VLC_EGENERIC;
 211
 212     i_initializations--;
 213     if( i_initializations == 0 )
 214     {
 215         i_status = VLC_THREADS_UNINITIALIZED;
 216         vlc_object_destroy( p_root );
 217     }
 218
 219 #if defined( UNDER_CE )
 220 #elif defined( WIN32 )
 221 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 222 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 223     pthread_mutex_unlock( &once_mutex );
 224 #endif
 225     return VLC_SUCCESS;
 226 }
 227
 228 /*****************************************************************************
 229  * vlc_mutex_init: initialize a mutex
 230  *****************************************************************************/
 231 int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 232 {
 233     p_mutex->p_this = p_this;
 234
 235 #if defined( UNDER_CE )
 236     InitializeCriticalSection( &p_mutex->csection );
 237     return 0;
 238
 239 #elif defined( WIN32 )
 240     /* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
 241      * function and have a 100% correct vlc_cond_wait() implementation.
 242      * As this function is not available on Win9x, we can use the faster
 243      * CriticalSections */
 244     if( pf_SignalObjectAndWait && !b_fast_mutex )
 245     {
 246         /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 247         p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
 248         return ( p_mutex->mutex != NULL ? 0 : 1 );
 249     }
 250     else
 251     {
 252         p_mutex->mutex = NULL;
 253         InitializeCriticalSection( &p_mutex->csection );
 254         return 0;
 255     }
 256
 257 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 258     /* check the arguments and whether it's already been initialized */
 259     if( p_mutex == NULL )
 260     {
 261         return B_BAD_VALUE;
 262     }
 263
 264     if( p_mutex->init == 9999 )
 265     {
 266         return EALREADY;
 267     }
 268
 269     p_mutex->lock = create_sem( 1, "BeMutex" );
 270     if( p_mutex->lock < B_NO_ERROR )
 271     {
 272         return( -1 );
 273     }
 274
 275     p_mutex->init = 9999;
 276     return B_OK;
 277
 278 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 279 # if defined(DEBUG)
 280     {
 281         /* Create error-checking mutex to detect problems more easily. */
 282         pthread_mutexattr_t attr;
 283         int                 i_result;
 284
 285         pthread_mutexattr_init( &attr );
 286 #   if defined(SYS_LINUX)
 287         pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 288 #   else
 289         pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
 290 #   endif
 291
 292         i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 293         pthread_mutexattr_destroy( &attr );
 294         return( i_result );
 295     }
 296 # endif
 297     return pthread_mutex_init( &p_mutex->mutex, NULL );
 298
 299 #endif
 300 }
 301
 302 /*****************************************************************************
 303  * vlc_mutex_init: initialize a recursive mutex (Do not use)
 304  *****************************************************************************/
 305 int __vlc_mutex_init_recursive( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 306 {
 307 #if defined( WIN32 )
 308     /* Create mutex returns a recursive mutex */
 309     p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
 310     return ( p_mutex->mutex != NULL ? 0 : 1 );
 311 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 312     pthread_mutexattr_t attr;
 313     int                 i_result;
 314
 315     pthread_mutexattr_init( &attr );
 316 # if defined(DEBUG)
 317     /* Create error-checking mutex to detect problems more easily. */
 318 #   if defined(SYS_LINUX)
 319     pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 320 #   else
 321     pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
 322 #   endif
 323 # endif
 324     pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_RECURSIVE );
 325     i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 326     pthread_mutexattr_destroy( &attr );
 327     return( i_result );
 328 #else
 329     msg_Err(p_this, "no recursive mutex found. Falling back to regular mutex.\n"
 330                     "Expect hangs\n")
 331     return __vlc_mutex_init( p_this, p_mutex );
 332 #endif
 333 }
 334
 335
 336 /*****************************************************************************
 337  * vlc_mutex_destroy: destroy a mutex, inner version
 338  *****************************************************************************/
 339 int __vlc_mutex_destroy( const char * psz_file, int i_line, vlc_mutex_t *p_mutex )
 340 {
 341     int i_result;
 342     /* In case of error : */
 343     int i_thread = -1;
 344
 345 #if defined( UNDER_CE )
 346     DeleteCriticalSection( &p_mutex->csection );
 347     return 0;
 348
 349 #elif defined( WIN32 )
 350     if( p_mutex->mutex )
 351     {
 352         CloseHandle( p_mutex->mutex );
 353     }
 354     else
 355     {
 356         DeleteCriticalSection( &p_mutex->csection );
 357     }
 358     return 0;
 359
 360 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 361     if( p_mutex->init == 9999 )
 362     {
 363         delete_sem( p_mutex->lock );
 364     }
 365
 366     p_mutex->init = 0;
 367     return B_OK;
 368
 369 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 370     i_result = pthread_mutex_destroy( &p_mutex->mutex );
 371     if( i_result )
 372     {
 373         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 374         errno = i_result;
 375     }
 376
 377 #endif
 378
 379     if( i_result )
 380     {
 381         msg_Err( p_mutex->p_this,
 382                  "thread %d: mutex_destroy failed at %s:%d (%d:%m)",
 383                  i_thread, psz_file, i_line, i_result );
 384         vlc_threads_error( p_mutex->p_this );
 385     }
 386     return i_result;
 387 }
 388
 389 /*****************************************************************************
 390  * vlc_cond_init: initialize a condition
 391  *****************************************************************************/
 392 int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar )
 393 {
 394     p_condvar->p_this = p_this;
 395
 396 #if defined( UNDER_CE )
 397     /* Initialize counter */
 398     p_condvar->i_waiting_threads = 0;
 399
 400     /* Create an auto-reset event. */
 401     p_condvar->event = CreateEvent( NULL,   /* no security */
 402                                     FALSE,  /* auto-reset event */
 403                                     FALSE,  /* start non-signaled */
 404                                     NULL ); /* unnamed */
 405     return !p_condvar->event;
 406
 407 #elif defined( WIN32 )
 408     /* Initialize counter */
 409     p_condvar->i_waiting_threads = 0;
 410
 411     /* Misc init */
 412     p_condvar->i_win9x_cv = i_win9x_cv;
 413     p_condvar->SignalObjectAndWait = pf_SignalObjectAndWait;
 414
 415     if( (p_condvar->SignalObjectAndWait && !b_fast_mutex)
 416         || p_condvar->i_win9x_cv == 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
 424         p_condvar->semaphore = NULL;
 425         return !p_condvar->event;
 426     }
 427     else
 428     {
 429         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
 430                                                 0,          /* initial count */
 431                                                 0x7fffffff, /* max count */
 432                                                 NULL );     /* unnamed */
 433
 434         if( p_condvar->i_win9x_cv == 1 )
 435             /* Create a manual-reset event initially signaled. */
 436             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
 437         else
 438             /* Create a auto-reset event. */
 439             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
 440
 441         InitializeCriticalSection( &p_condvar->csection );
 442
 443         return !p_condvar->semaphore || !p_condvar->event;
 444     }
 445
 446 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 447     if( !p_condvar )
 448     {
 449         return B_BAD_VALUE;
 450     }
 451
 452     if( p_condvar->init == 9999 )
 453     {
 454         return EALREADY;
 455     }
 456
 457     p_condvar->thread = -1;
 458     p_condvar->init = 9999;
 459     return 0;
 460
 461 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 462     pthread_condattr_t attr;
 463     int ret;
 464
 465     ret = pthread_condattr_init (&attr);
 466     if (ret)
 467         return ret;
 468
 469 # if !defined (_POSIX_CLOCK_SELECTION)
 470    /* Fairly outdated POSIX support (that was defined in 2001) */
 471 #  define _POSIX_CLOCK_SELECTION (-1)
 472 # endif
 473 # if (_POSIX_CLOCK_SELECTION >= 0)
 474     /* NOTE: This must be the same clock as the one in mtime.c */
 475     pthread_condattr_setclock (&attr, CLOCK_MONOTONIC);
 476 # endif
 477
 478     ret = pthread_cond_init (&p_condvar->cond, &attr);
 479     pthread_condattr_destroy (&attr);
 480     return ret;
 481
 482 #endif
 483 }
 484
 485 /*****************************************************************************
 486  * vlc_cond_destroy: destroy a condition, inner version
 487  *****************************************************************************/
 488 int __vlc_cond_destroy( const char * psz_file, int i_line, vlc_cond_t *p_condvar )
 489 {
 490     int i_result;
 491     /* In case of error : */
 492     int i_thread = -1;
 493
 494 #if defined( UNDER_CE )
 495     i_result = !CloseHandle( p_condvar->event );
 496
 497 #elif defined( WIN32 )
 498     if( !p_condvar->semaphore )
 499         i_result = !CloseHandle( p_condvar->event );
 500     else
 501         i_result = !CloseHandle( p_condvar->event )
 502           || !CloseHandle( p_condvar->semaphore );
 503
 504     if( p_condvar->semaphore != NULL )
 505         DeleteCriticalSection( &p_condvar->csection );
 506
 507 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 508     p_condvar->init = 0;
 509     return 0;
 510
 511 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 512     i_result = pthread_cond_destroy( &p_condvar->cond );
 513     if( i_result )
 514     {
 515         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 516         errno = i_result;
 517     }
 518
 519 #endif
 520
 521     if( i_result )
 522     {
 523         msg_Err( p_condvar->p_this,
 524                  "thread %d: cond_destroy failed at %s:%d (%d:%m)",
 525                  i_thread, psz_file, i_line, i_result );
 526         vlc_threads_error( p_condvar->p_this );
 527     }
 528     return i_result;
 529 }
 530
 531 /*****************************************************************************
 532  * vlc_tls_create: create a thread-local variable
 533  *****************************************************************************/
 534 int __vlc_threadvar_create( vlc_object_t *p_this, vlc_threadvar_t *p_tls )
 535 {
 536     int i_ret = -1;
 537     (void)p_this;
 538
 539 #if defined( HAVE_KERNEL_SCHEDULER_H )
 540     msg_Err( p_this, "TLS not implemented" );
 541     i_ret VLC_EGENERIC;
 542 #elif defined( UNDER_CE ) || defined( WIN32 )
 543 #elif defined( WIN32 )
 544     p_tls->handle = TlsAlloc();
 545     i_ret = !( p_tls->handle == 0xFFFFFFFF );
 546
 547 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 548     i_ret =  pthread_key_create( &p_tls->handle, NULL );
 549 #endif
 550     return i_ret;
 551 }
 552
 553 /*****************************************************************************
 554  * vlc_thread_create: create a thread, inner version
 555  *****************************************************************************
 556  * Note that i_priority is only taken into account on platforms supporting
 557  * userland real-time priority threads.
 558  *****************************************************************************/
 559 int __vlc_thread_create( vlc_object_t *p_this, const char * psz_file, int i_line,
 560                          const char *psz_name, void * ( *func ) ( void * ),
 561                          int i_priority, vlc_bool_t b_wait )
 562 {
 563     int i_ret;
 564     void *p_data = (void *)p_this;
 565     vlc_object_internals_t *p_priv = p_this->p_internals;
 566
 567     vlc_mutex_lock( &p_this->object_lock );
 568
 569 #if defined( WIN32 ) || defined( UNDER_CE )
 570     {
 571         /* When using the MSVCRT C library you have to use the _beginthreadex
 572          * function instead of CreateThread, otherwise you'll end up with
 573          * memory leaks and the signal functions not working (see Microsoft
 574          * Knowledge Base, article 104641) */
 575 #if defined( UNDER_CE )
 576         DWORD  threadId;
 577         HANDLE hThread = CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE)func,
 578                                       (LPVOID)p_data, CREATE_SUSPENDED,
 579                       &threadId );
 580 #else
 581         unsigned threadId;
 582         uintptr_t hThread = _beginthreadex( NULL, 0,
 583                         (LPTHREAD_START_ROUTINE)func,
 584                                             (void*)p_data, CREATE_SUSPENDED,
 585                         &threadId );
 586 #endif
 587         p_priv->thread_id.id = (DWORD)threadId;
 588         p_priv->thread_id.hThread = (HANDLE)hThread;
 589     ResumeThread((HANDLE)hThread);
 590     }
 591
 592     i_ret = ( p_priv->thread_id.hThread ? 0 : 1 );
 593
 594     if( i_ret && i_priority )
 595     {
 596         if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
 597         {
 598             msg_Warn( p_this, "couldn't set a faster priority" );
 599             i_priority = 0;
 600         }
 601     }
 602
 603 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 604     p_priv->thread_id = spawn_thread( (thread_func)func, psz_name,
 605                                       i_priority, p_data );
 606     i_ret = resume_thread( p_priv->thread_id );
 607
 608 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 609     i_ret = pthread_create( &p_priv->thread_id, NULL, func, p_data );
 610
 611 #ifndef __APPLE__
 612     if( config_GetInt( p_this, "rt-priority" ) )
 613 #endif
 614     {
 615         int i_error, i_policy;
 616         struct sched_param param;
 617
 618         memset( &param, 0, sizeof(struct sched_param) );
 619         if( config_GetType( p_this, "rt-offset" ) )
 620         {
 621             i_priority += config_GetInt( p_this, "rt-offset" );
 622         }
 623         if( i_priority <= 0 )
 624         {
 625             param.sched_priority = (-1) * i_priority;
 626             i_policy = SCHED_OTHER;
 627         }
 628         else
 629         {
 630             param.sched_priority = i_priority;
 631             i_policy = SCHED_RR;
 632         }
 633         if( (i_error = pthread_setschedparam( p_priv->thread_id,
 634                                                i_policy, &param )) )
 635         {
 636             errno = i_error;
 637             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %m",
 638                       psz_file, i_line );
 639             i_priority = 0;
 640         }
 641     }
 642 #ifndef __APPLE__
 643     else
 644     {
 645         i_priority = 0;
 646     }
 647 #endif
 648
 649 #endif
 650
 651     if( i_ret == 0 )
 652     {
 653         if( b_wait )
 654         {
 655             msg_Dbg( p_this, "waiting for thread completion" );
 656             vlc_object_wait( p_this );
 657         }
 658
 659         p_priv->b_thread = VLC_TRUE;
 660
 661 #if defined( WIN32 ) || defined( UNDER_CE )
 662         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 663                  (unsigned int)p_priv->thread_id.id, psz_name,
 664          i_priority, psz_file, i_line );
 665 #else
 666         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 667                  (unsigned int)p_priv->thread_id, psz_name, i_priority,
 668                  psz_file, i_line );
 669 #endif
 670
 671
 672         vlc_mutex_unlock( &p_this->object_lock );
 673     }
 674     else
 675     {
 676         errno = i_ret;
 677         msg_Err( p_this, "%s thread could not be created at %s:%d (%m)",
 678                          psz_name, psz_file, i_line );
 679         vlc_threads_error( p_this );
 680         vlc_mutex_unlock( &p_this->object_lock );
 681     }
 682
 683     return i_ret;
 684 }
 685
 686 /*****************************************************************************
 687  * vlc_thread_set_priority: set the priority of the current thread when we
 688  * couldn't set it in vlc_thread_create (for instance for the main thread)
 689  *****************************************************************************/
 690 int __vlc_thread_set_priority( vlc_object_t *p_this, const char * psz_file,
 691                                int i_line, int i_priority )
 692 {
 693     vlc_object_internals_t *p_priv = p_this->p_internals;
 694 #if defined( WIN32 ) || defined( UNDER_CE )
 695     if( !p_priv->thread_id.hThread )
 696         p_priv->thread_id.hThread = GetCurrentThread();
 697     if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
 698     {
 699         msg_Warn( p_this, "couldn't set a faster priority" );
 700         return 1;
 701     }
 702
 703 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 704 # ifndef __APPLE__
 705     if( config_GetInt( p_this, "rt-priority" ) > 0 )
 706 # endif
 707     {
 708         int i_error, i_policy;
 709         struct sched_param param;
 710
 711         memset( &param, 0, sizeof(struct sched_param) );
 712         if( config_GetType( p_this, "rt-offset" ) )
 713         {
 714             i_priority += config_GetInt( p_this, "rt-offset" );
 715         }
 716         if( i_priority <= 0 )
 717         {
 718             param.sched_priority = (-1) * i_priority;
 719             i_policy = SCHED_OTHER;
 720         }
 721         else
 722         {
 723             param.sched_priority = i_priority;
 724             i_policy = SCHED_RR;
 725         }
 726         if( !p_priv->thread_id )
 727             p_priv->thread_id = pthread_self();
 728         if( (i_error = pthread_setschedparam( p_priv->thread_id,
 729                                                i_policy, &param )) )
 730         {
 731             errno = i_error;
 732             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %m",
 733                       psz_file, i_line );
 734             i_priority = 0;
 735         }
 736     }
 737 #endif
 738
 739     return 0;
 740 }
 741
 742 /*****************************************************************************
 743  * vlc_thread_ready: tell the parent thread we were successfully spawned
 744  *****************************************************************************/
 745 void __vlc_thread_ready( vlc_object_t *p_this )
 746 {
 747     vlc_object_signal( p_this );
 748 }
 749
 750 /*****************************************************************************
 751  * vlc_thread_join: wait until a thread exits, inner version
 752  *****************************************************************************/
 753 void __vlc_thread_join( vlc_object_t *p_this, const char * psz_file, int i_line )
 754 {
 755     vlc_object_internals_t *p_priv = p_this->p_internals;
 756
 757 #if defined( UNDER_CE ) || defined( WIN32 )
 758     HMODULE hmodule;
 759     BOOL (WINAPI *OurGetThreadTimes)( HANDLE, FILETIME*, FILETIME*,
 760                                       FILETIME*, FILETIME* );
 761     FILETIME create_ft, exit_ft, kernel_ft, user_ft;
 762     int64_t real_time, kernel_time, user_time;
 763     HANDLE hThread;
 764
 765     /*
 766     ** object will close its thread handle when destroyed, duplicate it here
 767     ** to be on the safe side
 768     */
 769     if( ! DuplicateHandle(GetCurrentProcess(),
 770             p_priv->thread_id.hThread,
 771             GetCurrentProcess(),
 772             &hThread,
 773             0,
 774             FALSE,
 775             DUPLICATE_SAME_ACCESS) )
 776     {
 777         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%s)",
 778                          (unsigned int)p_priv->thread_id.id,
 779              psz_file, i_line, GetLastError() );
 780         vlc_threads_error( p_this );
 781         p_priv->b_thread = VLC_FALSE;
 782         return;
 783     }
 784
 785     WaitForSingleObject( hThread, INFINITE );
 786
 787     msg_Dbg( p_this, "thread %u joined (%s:%d)",
 788              (unsigned int)p_priv->thread_id.id,
 789              psz_file, i_line );
 790 #if defined( UNDER_CE )
 791     hmodule = GetModuleHandle( _T("COREDLL") );
 792 #else
 793     hmodule = GetModuleHandle( _T("KERNEL32") );
 794 #endif
 795     OurGetThreadTimes = (BOOL (WINAPI*)( HANDLE, FILETIME*, FILETIME*,
 796                                          FILETIME*, FILETIME* ))
 797         GetProcAddress( hmodule, _T("GetThreadTimes") );
 798
 799     if( OurGetThreadTimes &&
 800         OurGetThreadTimes( hThread,
 801                            &create_ft, &exit_ft, &kernel_ft, &user_ft ) )
 802     {
 803         real_time =
 804           ((((int64_t)exit_ft.dwHighDateTime)<<32)| exit_ft.dwLowDateTime) -
 805           ((((int64_t)create_ft.dwHighDateTime)<<32)| create_ft.dwLowDateTime);
 806         real_time /= 10;
 807
 808         kernel_time =
 809           ((((int64_t)kernel_ft.dwHighDateTime)<<32)|
 810            kernel_ft.dwLowDateTime) / 10;
 811
 812         user_time =
 813           ((((int64_t)user_ft.dwHighDateTime)<<32)|
 814            user_ft.dwLowDateTime) / 10;
 815
 816         msg_Dbg( p_this, "thread times: "
 817                  "real "I64Fd"m%fs, kernel "I64Fd"m%fs, user "I64Fd"m%fs",
 818                  real_time/60/1000000,
 819                  (double)((real_time%(60*1000000))/1000000.0),
 820                  kernel_time/60/1000000,
 821                  (double)((kernel_time%(60*1000000))/1000000.0),
 822                  user_time/60/1000000,
 823                  (double)((user_time%(60*1000000))/1000000.0) );
 824     }
 825     CloseHandle( hThread );
 826
 827 #else /* !defined(WIN32) */
 828
 829     int i_ret = 0;
 830
 831 #if defined( HAVE_KERNEL_SCHEDULER_H )
 832     int32_t exit_value;
 833     i_ret = (B_OK == wait_for_thread( p_priv->thread_id, &exit_value ));
 834
 835 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 836     i_ret = pthread_join( p_priv->thread_id, NULL );
 837
 838 #endif
 839
 840     if( i_ret )
 841     {
 842         errno = i_ret;
 843         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%m)",
 844                          (unsigned int)p_priv->thread_id, psz_file, i_line );
 845         vlc_threads_error( p_this );
 846     }
 847     else
 848     {
 849         msg_Dbg( p_this, "thread %u joined (%s:%d)",
 850                          (unsigned int)p_priv->thread_id, psz_file, i_line );
 851     }
 852
 853 #endif
 854
 855     p_priv->b_thread = VLC_FALSE;
 856 }
 857