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 #endif
  74
  75 vlc_threadvar_t msg_context_global_key;
  76
  77 #ifndef NDEBUG
  78 /*****************************************************************************
  79  * vlc_threads_error: Report an error from the threading mecanism
  80  *****************************************************************************
  81  * This is especially useful to debug those errors, as this is a nice symbol
  82  * on which you can break.
  83  *****************************************************************************/
  84 void vlc_threads_error( vlc_object_t *p_this )
  85 {
  86      msg_Err( p_this, "Error detected. Put a breakpoint in '%s' to debug.",
  87             __func__ );
  88 }
  89 #endif
  90
  91 /*****************************************************************************
  92  * vlc_threads_init: initialize threads system
  93  *****************************************************************************
  94  * This function requires lazy initialization of a global lock in order to
  95  * keep the library really thread-safe. Some architectures don't support this
  96  * and thus do not guarantee the complete reentrancy.
  97  *****************************************************************************/
  98 int __vlc_threads_init( vlc_object_t *p_this )
  99 {
 100     libvlc_global_data_t *p_libvlc_global = (libvlc_global_data_t *)p_this;
 101     int i_ret = VLC_SUCCESS;
 102
 103     /* If we have lazy mutex initialization, use it. Otherwise, we just
 104      * hope nothing wrong happens. */
 105 #if defined( UNDER_CE )
 106 #elif defined( WIN32 )
 107     if( IsDebuggerPresent() )
 108     {
 109         /* SignalObjectAndWait() is problematic under a debugger */
 110         b_fast_mutex = VLC_TRUE;
 111         i_win9x_cv = 1;
 112     }
 113 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 114 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 115     pthread_mutex_lock( &once_mutex );
 116 #endif
 117
 118     if( i_status == VLC_THREADS_UNINITIALIZED )
 119     {
 120         i_status = VLC_THREADS_PENDING;
 121
 122         /* We should be safe now. Do all the initialization stuff we want. */
 123         p_libvlc_global->b_ready = VLC_FALSE;
 124
 125 #if defined( UNDER_CE )
 126         /* Nothing to initialize */
 127
 128 #elif defined( WIN32 )
 129         /* Dynamically get the address of SignalObjectAndWait */
 130         if( GetVersion() < 0x80000000 )
 131         {
 132             HINSTANCE hInstLib;
 133
 134             /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 135             hInstLib = LoadLibrary( "kernel32" );
 136             if( hInstLib )
 137             {
 138                 pf_SignalObjectAndWait =
 139                     (SIGNALOBJECTANDWAIT)GetProcAddress( hInstLib,
 140                                                      "SignalObjectAndWait" );
 141             }
 142         }
 143
 144 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 145 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 146 #endif
 147
 148         p_root = vlc_object_create( p_libvlc_global, VLC_OBJECT_GLOBAL );
 149         if( p_root == NULL )
 150             i_ret = VLC_ENOMEM;
 151
 152         if( i_ret )
 153         {
 154             i_status = VLC_THREADS_ERROR;
 155         }
 156         else
 157         {
 158             i_initializations++;
 159             i_status = VLC_THREADS_READY;
 160         }
 161
 162         vlc_threadvar_create( p_root, &msg_context_global_key );
 163     }
 164     else
 165     {
 166         /* Just increment the initialization count */
 167         i_initializations++;
 168     }
 169
 170     /* If we have lazy mutex initialization support, unlock the mutex;
 171      * otherwize, do a naive wait loop. */
 172 #if defined( UNDER_CE )
 173     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 174 #elif defined( WIN32 )
 175     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 176 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 177     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 178 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 179     pthread_mutex_unlock( &once_mutex );
 180 #endif
 181
 182     if( i_status != VLC_THREADS_READY )
 183     {
 184         return VLC_ETHREAD;
 185     }
 186
 187     return i_ret;
 188 }
 189
 190 /*****************************************************************************
 191  * vlc_threads_end: stop threads system
 192  *****************************************************************************
 193  * FIXME: This function is far from being threadsafe.
 194  *****************************************************************************/
 195 int __vlc_threads_end( vlc_object_t *p_this )
 196 {
 197     (void)p_this;
 198 #if defined( UNDER_CE )
 199 #elif defined( WIN32 )
 200 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 201 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 202     pthread_mutex_lock( &once_mutex );
 203 #endif
 204
 205     if( i_initializations == 0 )
 206         return VLC_EGENERIC;
 207
 208     i_initializations--;
 209     if( i_initializations == 0 )
 210     {
 211         i_status = VLC_THREADS_UNINITIALIZED;
 212         vlc_object_destroy( p_root );
 213     }
 214
 215 #if defined( UNDER_CE )
 216 #elif defined( WIN32 )
 217 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 218 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 219     pthread_mutex_unlock( &once_mutex );
 220 #endif
 221     return VLC_SUCCESS;
 222 }
 223
 224 /*****************************************************************************
 225  * vlc_mutex_init: initialize a mutex
 226  *****************************************************************************/
 227 int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 228 {
 229     p_mutex->p_this = p_this;
 230
 231 #if defined( UNDER_CE )
 232     InitializeCriticalSection( &p_mutex->csection );
 233     return 0;
 234
 235 #elif defined( WIN32 )
 236     /* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
 237      * function and have a 100% correct vlc_cond_wait() implementation.
 238      * As this function is not available on Win9x, we can use the faster
 239      * CriticalSections */
 240     if( pf_SignalObjectAndWait && !b_fast_mutex )
 241     {
 242         /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 243         p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
 244         return ( p_mutex->mutex != NULL ? 0 : 1 );
 245     }
 246     else
 247     {
 248         p_mutex->mutex = NULL;
 249         InitializeCriticalSection( &p_mutex->csection );
 250         return 0;
 251     }
 252
 253 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 254     /* check the arguments and whether it's already been initialized */
 255     if( p_mutex == NULL )
 256     {
 257         return B_BAD_VALUE;
 258     }
 259
 260     if( p_mutex->init == 9999 )
 261     {
 262         return EALREADY;
 263     }
 264
 265     p_mutex->lock = create_sem( 1, "BeMutex" );
 266     if( p_mutex->lock < B_NO_ERROR )
 267     {
 268         return( -1 );
 269     }
 270
 271     p_mutex->init = 9999;
 272     return B_OK;
 273
 274 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 275 # if defined(DEBUG)
 276     {
 277         /* Create error-checking mutex to detect problems more easily. */
 278         pthread_mutexattr_t attr;
 279         int                 i_result;
 280
 281         pthread_mutexattr_init( &attr );
 282 #   if defined(SYS_LINUX)
 283         pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 284 #   else
 285         pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
 286 #   endif
 287
 288         i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 289         pthread_mutexattr_destroy( &attr );
 290         return( i_result );
 291     }
 292 # endif
 293     return pthread_mutex_init( &p_mutex->mutex, NULL );
 294
 295 #endif
 296 }
 297
 298 /*****************************************************************************
 299  * vlc_mutex_init: initialize a recursive mutex (Do not use)
 300  *****************************************************************************/
 301 int __vlc_mutex_init_recursive( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 302 {
 303 #if defined( WIN32 )
 304     /* Create mutex returns a recursive mutex */
 305     p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
 306     return ( p_mutex->mutex != NULL ? 0 : 1 );
 307 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 308     pthread_mutexattr_t attr;
 309     int                 i_result;
 310
 311     pthread_mutexattr_init( &attr );
 312 # if defined(DEBUG)
 313     /* Create error-checking mutex to detect problems more easily. */
 314 #   if defined(SYS_LINUX)
 315     pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 316 #   else
 317     pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
 318 #   endif
 319 # endif
 320     pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_RECURSIVE );
 321     i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 322     pthread_mutexattr_destroy( &attr );
 323     return( i_result );
 324 #else
 325     msg_Err(p_this, "no recursive mutex found. Falling back to regular mutex.\n"
 326                     "Expect hangs\n")
 327     return __vlc_mutex_init( p_this, p_mutex );
 328 #endif
 329 }
 330
 331
 332 /*****************************************************************************
 333  * vlc_mutex_destroy: destroy a mutex, inner version
 334  *****************************************************************************/
 335 int __vlc_mutex_destroy( const char * psz_file, int i_line, vlc_mutex_t *p_mutex )
 336 {
 337     int i_result;
 338     /* In case of error : */
 339     int i_thread = -1;
 340
 341 #if defined( UNDER_CE )
 342     DeleteCriticalSection( &p_mutex->csection );
 343     return 0;
 344
 345 #elif defined( WIN32 )
 346     if( p_mutex->mutex )
 347     {
 348         CloseHandle( p_mutex->mutex );
 349     }
 350     else
 351     {
 352         DeleteCriticalSection( &p_mutex->csection );
 353     }
 354     return 0;
 355
 356 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 357     if( p_mutex->init == 9999 )
 358     {
 359         delete_sem( p_mutex->lock );
 360     }
 361
 362     p_mutex->init = 0;
 363     return B_OK;
 364
 365 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 366     i_result = pthread_mutex_destroy( &p_mutex->mutex );
 367     if( i_result )
 368     {
 369         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 370         errno = i_result;
 371     }
 372
 373 #endif
 374
 375     if( i_result )
 376     {
 377         msg_Err( p_mutex->p_this,
 378                  "thread %d: mutex_destroy failed at %s:%d (%d:%m)",
 379                  i_thread, psz_file, i_line, i_result );
 380         vlc_threads_error( p_mutex->p_this );
 381     }
 382     return i_result;
 383 }
 384
 385 /*****************************************************************************
 386  * vlc_cond_init: initialize a condition
 387  *****************************************************************************/
 388 int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar )
 389 {
 390     p_condvar->p_this = p_this;
 391
 392 #if defined( UNDER_CE )
 393     /* Initialize counter */
 394     p_condvar->i_waiting_threads = 0;
 395
 396     /* Create an auto-reset event. */
 397     p_condvar->event = CreateEvent( NULL,   /* no security */
 398                                     FALSE,  /* auto-reset event */
 399                                     FALSE,  /* start non-signaled */
 400                                     NULL ); /* unnamed */
 401     return !p_condvar->event;
 402
 403 #elif defined( WIN32 )
 404     /* Initialize counter */
 405     p_condvar->i_waiting_threads = 0;
 406
 407     /* Misc init */
 408     p_condvar->i_win9x_cv = i_win9x_cv;
 409     p_condvar->SignalObjectAndWait = pf_SignalObjectAndWait;
 410
 411     if( (p_condvar->SignalObjectAndWait && !b_fast_mutex)
 412         || p_condvar->i_win9x_cv == 0 )
 413     {
 414         /* Create an auto-reset event. */
 415         p_condvar->event = CreateEvent( NULL,   /* no security */
 416                                         FALSE,  /* auto-reset event */
 417                                         FALSE,  /* start non-signaled */
 418                                         NULL ); /* unnamed */
 419
 420         p_condvar->semaphore = NULL;
 421         return !p_condvar->event;
 422     }
 423     else
 424     {
 425         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
 426                                                 0,          /* initial count */
 427                                                 0x7fffffff, /* max count */
 428                                                 NULL );     /* unnamed */
 429
 430         if( p_condvar->i_win9x_cv == 1 )
 431             /* Create a manual-reset event initially signaled. */
 432             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
 433         else
 434             /* Create a auto-reset event. */
 435             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
 436
 437         InitializeCriticalSection( &p_condvar->csection );
 438
 439         return !p_condvar->semaphore || !p_condvar->event;
 440     }
 441
 442 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 443     if( !p_condvar )
 444     {
 445         return B_BAD_VALUE;
 446     }
 447
 448     if( p_condvar->init == 9999 )
 449     {
 450         return EALREADY;
 451     }
 452
 453     p_condvar->thread = -1;
 454     p_condvar->init = 9999;
 455     return 0;
 456
 457 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 458     pthread_condattr_t attr;
 459     int ret;
 460
 461     ret = pthread_condattr_init (&attr);
 462     if (ret)
 463         return ret;
 464
 465 # if !defined (_POSIX_CLOCK_SELECTION)
 466    /* Fairly outdated POSIX support (that was defined in 2001) */
 467 #  define _POSIX_CLOCK_SELECTION (-1)
 468 # endif
 469 # if (_POSIX_CLOCK_SELECTION >= 0)
 470     /* NOTE: This must be the same clock as the one in mtime.c */
 471     pthread_condattr_setclock (&attr, CLOCK_MONOTONIC);
 472 # endif
 473
 474     ret = pthread_cond_init (&p_condvar->cond, &attr);
 475     pthread_condattr_destroy (&attr);
 476     return ret;
 477
 478 #endif
 479 }
 480
 481 /*****************************************************************************
 482  * vlc_cond_destroy: destroy a condition, inner version
 483  *****************************************************************************/
 484 int __vlc_cond_destroy( const char * psz_file, int i_line, vlc_cond_t *p_condvar )
 485 {
 486     int i_result;
 487     /* In case of error : */
 488     int i_thread = -1;
 489
 490 #if defined( UNDER_CE )
 491     i_result = !CloseHandle( p_condvar->event );
 492
 493 #elif defined( WIN32 )
 494     if( !p_condvar->semaphore )
 495         i_result = !CloseHandle( p_condvar->event );
 496     else
 497         i_result = !CloseHandle( p_condvar->event )
 498           || !CloseHandle( p_condvar->semaphore );
 499
 500     if( p_condvar->semaphore != NULL )
 501         DeleteCriticalSection( &p_condvar->csection );
 502
 503 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 504     p_condvar->init = 0;
 505     return 0;
 506
 507 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 508     i_result = pthread_cond_destroy( &p_condvar->cond );
 509     if( i_result )
 510     {
 511         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 512         errno = i_result;
 513     }
 514
 515 #endif
 516
 517     if( i_result )
 518     {
 519         msg_Err( p_condvar->p_this,
 520                  "thread %d: cond_destroy failed at %s:%d (%d:%m)",
 521                  i_thread, psz_file, i_line, i_result );
 522         vlc_threads_error( p_condvar->p_this );
 523     }
 524     return i_result;
 525 }
 526
 527 /*****************************************************************************
 528  * vlc_tls_create: create a thread-local variable
 529  *****************************************************************************/
 530 int __vlc_threadvar_create( vlc_object_t *p_this, vlc_threadvar_t *p_tls )
 531 {
 532     int i_ret = -1;
 533     (void)p_this;
 534
 535 #if defined( HAVE_KERNEL_SCHEDULER_H )
 536     msg_Err( p_this, "TLS not implemented" );
 537     i_ret VLC_EGENERIC;
 538 #elif defined( UNDER_CE ) || defined( WIN32 )
 539 #elif defined( WIN32 )
 540     p_tls->handle = TlsAlloc();
 541     i_ret = !( p_tls->handle == 0xFFFFFFFF );
 542
 543 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 544     i_ret =  pthread_key_create( &p_tls->handle, NULL );
 545 #endif
 546     return i_ret;
 547 }
 548
 549 /*****************************************************************************
 550  * vlc_thread_create: create a thread, inner version
 551  *****************************************************************************
 552  * Note that i_priority is only taken into account on platforms supporting
 553  * userland real-time priority threads.
 554  *****************************************************************************/
 555 int __vlc_thread_create( vlc_object_t *p_this, const char * psz_file, int i_line,
 556                          const char *psz_name, void * ( *func ) ( void * ),
 557                          int i_priority, vlc_bool_t b_wait )
 558 {
 559     int i_ret;
 560     void *p_data = (void *)p_this;
 561     vlc_object_internals_t *p_priv = p_this->p_internals;
 562
 563     vlc_mutex_lock( &p_this->object_lock );
 564
 565 #if defined( WIN32 ) || defined( UNDER_CE )
 566     {
 567         /* When using the MSVCRT C library you have to use the _beginthreadex
 568          * function instead of CreateThread, otherwise you'll end up with
 569          * memory leaks and the signal functions not working (see Microsoft
 570          * Knowledge Base, article 104641) */
 571 #if defined( UNDER_CE )
 572         DWORD  threadId;
 573         HANDLE hThread = CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE)func,
 574                                       (LPVOID)p_data, CREATE_SUSPENDED,
 575                       &threadId );
 576 #else
 577         unsigned threadId;
 578         uintptr_t hThread = _beginthreadex( NULL, 0,
 579                         (LPTHREAD_START_ROUTINE)func,
 580                                             (void*)p_data, CREATE_SUSPENDED,
 581                         &threadId );
 582 #endif
 583         p_priv->thread_id.id = (DWORD)threadId;
 584         p_priv->thread_id.hThread = (HANDLE)hThread;
 585     ResumeThread((HANDLE)hThread);
 586     }
 587
 588     i_ret = ( p_priv->thread_id.hThread ? 0 : 1 );
 589
 590     if( i_ret && i_priority )
 591     {
 592         if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
 593         {
 594             msg_Warn( p_this, "couldn't set a faster priority" );
 595             i_priority = 0;
 596         }
 597     }
 598
 599 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 600     p_priv->thread_id = spawn_thread( (thread_func)func, psz_name,
 601                                       i_priority, p_data );
 602     i_ret = resume_thread( p_priv->thread_id );
 603
 604 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 605     i_ret = pthread_create( &p_priv->thread_id, NULL, func, p_data );
 606
 607 #ifndef __APPLE__
 608     if( config_GetInt( p_this, "rt-priority" ) )
 609 #endif
 610     {
 611         int i_error, i_policy;
 612         struct sched_param param;
 613
 614         memset( &param, 0, sizeof(struct sched_param) );
 615         if( config_GetType( p_this, "rt-offset" ) )
 616         {
 617             i_priority += config_GetInt( p_this, "rt-offset" );
 618         }
 619         if( i_priority <= 0 )
 620         {
 621             param.sched_priority = (-1) * i_priority;
 622             i_policy = SCHED_OTHER;
 623         }
 624         else
 625         {
 626             param.sched_priority = i_priority;
 627             i_policy = SCHED_RR;
 628         }
 629         if( (i_error = pthread_setschedparam( p_priv->thread_id,
 630                                                i_policy, &param )) )
 631         {
 632             errno = i_error;
 633             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %m",
 634                       psz_file, i_line );
 635             i_priority = 0;
 636         }
 637     }
 638 #ifndef __APPLE__
 639     else
 640     {
 641         i_priority = 0;
 642     }
 643 #endif
 644
 645 #endif
 646
 647     if( i_ret == 0 )
 648     {
 649         if( b_wait )
 650         {
 651             msg_Dbg( p_this, "waiting for thread completion" );
 652             vlc_object_wait( p_this );
 653         }
 654
 655         p_priv->b_thread = VLC_TRUE;
 656
 657 #if defined( WIN32 ) || defined( UNDER_CE )
 658         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 659                  (unsigned int)p_priv->thread_id.id, psz_name,
 660          i_priority, psz_file, i_line );
 661 #else
 662         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 663                  (unsigned int)p_priv->thread_id, psz_name, i_priority,
 664                  psz_file, i_line );
 665 #endif
 666
 667
 668         vlc_mutex_unlock( &p_this->object_lock );
 669     }
 670     else
 671     {
 672         errno = i_ret;
 673         msg_Err( p_this, "%s thread could not be created at %s:%d (%m)",
 674                          psz_name, psz_file, i_line );
 675         vlc_threads_error( p_this );
 676         vlc_mutex_unlock( &p_this->object_lock );
 677     }
 678
 679     return i_ret;
 680 }
 681
 682 /*****************************************************************************
 683  * vlc_thread_set_priority: set the priority of the current thread when we
 684  * couldn't set it in vlc_thread_create (for instance for the main thread)
 685  *****************************************************************************/
 686 int __vlc_thread_set_priority( vlc_object_t *p_this, const char * psz_file,
 687                                int i_line, int i_priority )
 688 {
 689     vlc_object_internals_t *p_priv = p_this->p_internals;
 690 #if defined( WIN32 ) || defined( UNDER_CE )
 691     if( !p_priv->thread_id.hThread )
 692         p_priv->thread_id.hThread = GetCurrentThread();
 693     if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
 694     {
 695         msg_Warn( p_this, "couldn't set a faster priority" );
 696         return 1;
 697     }
 698
 699 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 700 # ifndef __APPLE__
 701     if( config_GetInt( p_this, "rt-priority" ) > 0 )
 702 # endif
 703     {
 704         int i_error, i_policy;
 705         struct sched_param param;
 706
 707         memset( &param, 0, sizeof(struct sched_param) );
 708         if( config_GetType( p_this, "rt-offset" ) )
 709         {
 710             i_priority += config_GetInt( p_this, "rt-offset" );
 711         }
 712         if( i_priority <= 0 )
 713         {
 714             param.sched_priority = (-1) * i_priority;
 715             i_policy = SCHED_OTHER;
 716         }
 717         else
 718         {
 719             param.sched_priority = i_priority;
 720             i_policy = SCHED_RR;
 721         }
 722         if( !p_priv->thread_id )
 723             p_priv->thread_id = pthread_self();
 724         if( (i_error = pthread_setschedparam( p_priv->thread_id,
 725                                                i_policy, &param )) )
 726         {
 727             errno = i_error;
 728             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %m",
 729                       psz_file, i_line );
 730             i_priority = 0;
 731         }
 732     }
 733 #endif
 734
 735     return 0;
 736 }
 737
 738 /*****************************************************************************
 739  * vlc_thread_ready: tell the parent thread we were successfully spawned
 740  *****************************************************************************/
 741 void __vlc_thread_ready( vlc_object_t *p_this )
 742 {
 743     vlc_object_signal( p_this );
 744 }
 745
 746 /*****************************************************************************
 747  * vlc_thread_join: wait until a thread exits, inner version
 748  *****************************************************************************/
 749 void __vlc_thread_join( vlc_object_t *p_this, const char * psz_file, int i_line )
 750 {
 751     vlc_object_internals_t *p_priv = p_this->p_internals;
 752
 753 #if defined( UNDER_CE ) || defined( WIN32 )
 754     HMODULE hmodule;
 755     BOOL (WINAPI *OurGetThreadTimes)( HANDLE, FILETIME*, FILETIME*,
 756                                       FILETIME*, FILETIME* );
 757     FILETIME create_ft, exit_ft, kernel_ft, user_ft;
 758     int64_t real_time, kernel_time, user_time;
 759     HANDLE hThread;
 760
 761     /*
 762     ** object will close its thread handle when destroyed, duplicate it here
 763     ** to be on the safe side
 764     */
 765     if( ! DuplicateHandle(GetCurrentProcess(),
 766             p_priv->thread_id.hThread,
 767             GetCurrentProcess(),
 768             &hThread,
 769             0,
 770             FALSE,
 771             DUPLICATE_SAME_ACCESS) )
 772     {
 773         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%s)",
 774                          (unsigned int)p_priv->thread_id.id,
 775              psz_file, i_line, GetLastError() );
 776         vlc_threads_error( p_this );
 777         p_priv->b_thread = VLC_FALSE;
 778         return;
 779     }
 780
 781     WaitForSingleObject( hThread, INFINITE );
 782
 783     msg_Dbg( p_this, "thread %u joined (%s:%d)",
 784              (unsigned int)p_priv->thread_id.id,
 785              psz_file, i_line );
 786 #if defined( UNDER_CE )
 787     hmodule = GetModuleHandle( _T("COREDLL") );
 788 #else
 789     hmodule = GetModuleHandle( _T("KERNEL32") );
 790 #endif
 791     OurGetThreadTimes = (BOOL (WINAPI*)( HANDLE, FILETIME*, FILETIME*,
 792                                          FILETIME*, FILETIME* ))
 793         GetProcAddress( hmodule, _T("GetThreadTimes") );
 794
 795     if( OurGetThreadTimes &&
 796         OurGetThreadTimes( hThread,
 797                            &create_ft, &exit_ft, &kernel_ft, &user_ft ) )
 798     {
 799         real_time =
 800           ((((int64_t)exit_ft.dwHighDateTime)<<32)| exit_ft.dwLowDateTime) -
 801           ((((int64_t)create_ft.dwHighDateTime)<<32)| create_ft.dwLowDateTime);
 802         real_time /= 10;
 803
 804         kernel_time =
 805           ((((int64_t)kernel_ft.dwHighDateTime)<<32)|
 806            kernel_ft.dwLowDateTime) / 10;
 807
 808         user_time =
 809           ((((int64_t)user_ft.dwHighDateTime)<<32)|
 810            user_ft.dwLowDateTime) / 10;
 811
 812         msg_Dbg( p_this, "thread times: "
 813                  "real "I64Fd"m%fs, kernel "I64Fd"m%fs, user "I64Fd"m%fs",
 814                  real_time/60/1000000,
 815                  (double)((real_time%(60*1000000))/1000000.0),
 816                  kernel_time/60/1000000,
 817                  (double)((kernel_time%(60*1000000))/1000000.0),
 818                  user_time/60/1000000,
 819                  (double)((user_time%(60*1000000))/1000000.0) );
 820     }
 821     CloseHandle( hThread );
 822
 823 #else /* !defined(WIN32) */
 824
 825     int i_ret = 0;
 826
 827 #if defined( HAVE_KERNEL_SCHEDULER_H )
 828     int32_t exit_value;
 829     i_ret = (B_OK == wait_for_thread( p_priv->thread_id, &exit_value ));
 830
 831 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 832     i_ret = pthread_join( p_priv->thread_id, NULL );
 833
 834 #endif
 835
 836     if( i_ret )
 837     {
 838         errno = i_ret;
 839         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%m)",
 840                          (unsigned int)p_priv->thread_id, psz_file, i_line );
 841         vlc_threads_error( p_this );
 842     }
 843     else
 844     {
 845         msg_Dbg( p_this, "thread %u joined (%s:%d)",
 846                          (unsigned int)p_priv->thread_id, psz_file, i_line );
 847     }
 848
 849 #endif
 850
 851     p_priv->b_thread = VLC_FALSE;
 852 }
 853