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