git.sesse.net Git - vlc/blob - src/misc/threads.c

   1 /*****************************************************************************
   2  * threads.c : threads implementation for the VideoLAN client
   3  *****************************************************************************
   4  * Copyright (C) 1999-2007 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Jean-Marc Dressler <polux@via.ecp.fr>
   8  *          Samuel Hocevar <sam@zoy.org>
   9  *          Gildas Bazin <gbazin@netcourrier.com>
  10  *          Clément Sténac
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  25  *****************************************************************************/
  26
  27 #include <vlc/vlc.h>
  28
  29 #include "libvlc.h"
  30 #include <assert.h>
  31 #ifdef HAVE_UNISTD_H
  32 # include <unistd.h>
  33 #endif
  34
  35 #define VLC_THREADS_UNINITIALIZED  0
  36 #define VLC_THREADS_PENDING        1
  37 #define VLC_THREADS_ERROR          2
  38 #define VLC_THREADS_READY          3
  39
  40 /*****************************************************************************
  41  * Global mutex for lazy initialization of the threads system
  42  *****************************************************************************/
  43 static volatile unsigned i_initializations = 0;
  44 static volatile int i_status = VLC_THREADS_UNINITIALIZED;
  45 static vlc_object_t *p_root;
  46
  47 #if defined( PTH_INIT_IN_PTH_H )
  48 #elif defined( ST_INIT_IN_ST_H )
  49 #elif defined( UNDER_CE )
  50 #elif defined( WIN32 )
  51
  52 /* following is only available on NT/2000/XP and above */
  53 static SIGNALOBJECTANDWAIT pf_SignalObjectAndWait = NULL;
  54
  55 /*
  56 ** On Windows NT/2K/XP we use a slow mutex implementation but which
  57 ** allows us to correctly implement condition variables.
  58 ** You can also use the faster Win9x implementation but you might
  59 ** experience problems with it.
  60 */
  61 static vlc_bool_t          b_fast_mutex = VLC_FALSE;
  62 /*
  63 ** On Windows 9x/Me you can use a fast but incorrect condition variables
  64 ** implementation (more precisely there is a possibility for a race
  65 ** condition to happen).
  66 ** However it is possible to use slower alternatives which are more robust.
  67 ** Currently you can choose between implementation 0 (which is the
  68 ** fastest but slightly incorrect), 1 (default) and 2.
  69 */
  70 static int i_win9x_cv = 1;
  71
  72 #elif defined( HAVE_KERNEL_SCHEDULER_H )
  73 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
  74 static pthread_mutex_t once_mutex = PTHREAD_MUTEX_INITIALIZER;
  75 #elif defined( HAVE_CTHREADS_H )
  76 #endif
  77
  78 vlc_threadvar_t msg_context_global_key;
  79
  80 /*****************************************************************************
  81  * vlc_threads_init: initialize threads system
  82  *****************************************************************************
  83  * This function requires lazy initialization of a global lock in order to
  84  * keep the library really thread-safe. Some architectures don't support this
  85  * and thus do not guarantee the complete reentrancy.
  86  *****************************************************************************/
  87 int __vlc_threads_init( vlc_object_t *p_this )
  88 {
  89     libvlc_global_data_t *p_libvlc_global = (libvlc_global_data_t *)p_this;
  90     int i_ret = VLC_SUCCESS;
  91
  92     /* If we have lazy mutex initialization, use it. Otherwise, we just
  93      * hope nothing wrong happens. */
  94 #if defined( PTH_INIT_IN_PTH_H )
  95 #elif defined( ST_INIT_IN_ST_H )
  96 #elif defined( UNDER_CE )
  97 #elif defined( WIN32 )
  98     if( IsDebuggerPresent() )
  99     {
 100         /* SignalObjectAndWait() is problematic under a debugger */
 101         b_fast_mutex = VLC_TRUE;
 102         i_win9x_cv = 1;
 103     }
 104 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 105 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 106     pthread_mutex_lock( &once_mutex );
 107 #elif defined( HAVE_CTHREADS_H )
 108 #endif
 109
 110     if( i_status == VLC_THREADS_UNINITIALIZED )
 111     {
 112         i_status = VLC_THREADS_PENDING;
 113
 114         /* We should be safe now. Do all the initialization stuff we want. */
 115         p_libvlc_global->b_ready = VLC_FALSE;
 116
 117 #if defined( PTH_INIT_IN_PTH_H )
 118         i_ret = ( pth_init() == FALSE );
 119
 120 #elif defined( ST_INIT_IN_ST_H )
 121         i_ret = st_init();
 122
 123 #elif defined( UNDER_CE )
 124         /* Nothing to initialize */
 125
 126 #elif defined( WIN32 )
 127         /* Dynamically get the address of SignalObjectAndWait */
 128         if( GetVersion() < 0x80000000 )
 129         {
 130             HINSTANCE hInstLib;
 131
 132             /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 133             hInstLib = LoadLibrary( "kernel32" );
 134             if( hInstLib )
 135             {
 136                 pf_SignalObjectAndWait =
 137                     (SIGNALOBJECTANDWAIT)GetProcAddress( hInstLib,
 138                                                      "SignalObjectAndWait" );
 139             }
 140         }
 141
 142 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 143 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 144 #elif defined( HAVE_CTHREADS_H )
 145 #endif
 146
 147         p_root = vlc_object_create( p_libvlc_global, VLC_OBJECT_GLOBAL );
 148         if( p_root == NULL )
 149             i_ret = VLC_ENOMEM;
 150
 151         if( i_ret )
 152         {
 153             i_status = VLC_THREADS_ERROR;
 154         }
 155         else
 156         {
 157             i_initializations++;
 158             i_status = VLC_THREADS_READY;
 159         }
 160
 161         vlc_threadvar_create( p_root, &msg_context_global_key );
 162     }
 163     else
 164     {
 165         /* Just increment the initialization count */
 166         i_initializations++;
 167     }
 168
 169     /* If we have lazy mutex initialization support, unlock the mutex;
 170      * otherwize, do a naive wait loop. */
 171 #if defined( PTH_INIT_IN_PTH_H )
 172     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 173 #elif defined( ST_INIT_IN_ST_H )
 174     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 175 #elif defined( UNDER_CE )
 176     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 177 #elif defined( WIN32 )
 178     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 179 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 180     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 181 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 182     pthread_mutex_unlock( &once_mutex );
 183 #elif defined( HAVE_CTHREADS_H )
 184     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 185 #endif
 186
 187     if( i_status != VLC_THREADS_READY )
 188     {
 189         return VLC_ETHREAD;
 190     }
 191
 192     return i_ret;
 193 }
 194
 195 /*****************************************************************************
 196  * vlc_threads_end: stop threads system
 197  *****************************************************************************
 198  * FIXME: This function is far from being threadsafe.
 199  *****************************************************************************/
 200 int __vlc_threads_end( vlc_object_t *p_this )
 201 {
 202     (void)p_this;
 203 #if defined( PTH_INIT_IN_PTH_H )
 204 #elif defined( ST_INIT_IN_ST_H )
 205 #elif defined( UNDER_CE )
 206 #elif defined( WIN32 )
 207 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 208 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 209     pthread_mutex_lock( &once_mutex );
 210 #elif defined( HAVE_CTHREADS_H )
 211 #endif
 212
 213     if( i_initializations == 0 )
 214         return VLC_EGENERIC;
 215
 216     i_initializations--;
 217     if( i_initializations == 0 )
 218     {
 219         i_status = VLC_THREADS_UNINITIALIZED;
 220         vlc_object_destroy( p_root );
 221     }
 222
 223 #if defined( PTH_INIT_IN_PTH_H )
 224     if( i_initializations == 0 )
 225     {
 226         return ( pth_kill() == FALSE );
 227     }
 228
 229 #elif defined( ST_INIT_IN_ST_H )
 230 #elif defined( UNDER_CE )
 231 #elif defined( WIN32 )
 232 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 233 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 234     pthread_mutex_unlock( &once_mutex );
 235 #elif defined( HAVE_CTHREADS_H )
 236 #endif
 237     return VLC_SUCCESS;
 238 }
 239
 240 /*****************************************************************************
 241  * vlc_mutex_init: initialize a mutex
 242  *****************************************************************************/
 243 int __vlc_mutex_init( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 244 {
 245     assert( p_this );
 246     p_mutex->p_this = p_this;
 247
 248 #if defined( PTH_INIT_IN_PTH_H )
 249     return ( pth_mutex_init( &p_mutex->mutex ) == FALSE );
 250
 251 #elif defined( ST_INIT_IN_ST_H )
 252     p_mutex->mutex = st_mutex_new();
 253     return ( p_mutex->mutex == NULL ) ? errno : 0;
 254
 255 #elif defined( UNDER_CE )
 256     InitializeCriticalSection( &p_mutex->csection );
 257     return 0;
 258
 259 #elif defined( WIN32 )
 260     /* We use mutexes on WinNT/2K/XP because we can use the SignalObjectAndWait
 261      * function and have a 100% correct vlc_cond_wait() implementation.
 262      * As this function is not available on Win9x, we can use the faster
 263      * CriticalSections */
 264     if( pf_SignalObjectAndWait && !b_fast_mutex )
 265     {
 266         /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 267         p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
 268         return ( p_mutex->mutex != NULL ? 0 : 1 );
 269     }
 270     else
 271     {
 272         p_mutex->mutex = NULL;
 273         InitializeCriticalSection( &p_mutex->csection );
 274         return 0;
 275     }
 276
 277 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 278     /* check the arguments and whether it's already been initialized */
 279     if( p_mutex == NULL )
 280     {
 281         return B_BAD_VALUE;
 282     }
 283
 284     if( p_mutex->init == 9999 )
 285     {
 286         return EALREADY;
 287     }
 288
 289     p_mutex->lock = create_sem( 1, "BeMutex" );
 290     if( p_mutex->lock < B_NO_ERROR )
 291     {
 292         return( -1 );
 293     }
 294
 295     p_mutex->init = 9999;
 296     return B_OK;
 297
 298 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 299 # if defined(DEBUG)
 300 #   if defined(SYS_LINUX)
 301     {
 302         /* Create error-checking mutex to detect problems more easily. */
 303         pthread_mutexattr_t attr;
 304         int                 i_result;
 305
 306         pthread_mutexattr_init( &attr );
 307         pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 308         i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 309         pthread_mutexattr_destroy( &attr );
 310         return( i_result );
 311     }
 312 #   else
 313     {
 314         /* Create error-checking mutex to detect problems more easily. */
 315         pthread_mutexattr_t attr;
 316         int                 i_result;
 317
 318         pthread_mutexattr_init( &attr );
 319         pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
 320         i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 321         pthread_mutexattr_destroy( &attr );
 322         return( i_result );
 323     }
 324 #   endif
 325 # endif
 326     return pthread_mutex_init( &p_mutex->mutex, NULL );
 327
 328 #elif defined( HAVE_CTHREADS_H )
 329     mutex_init( p_mutex );
 330     return 0;
 331
 332 #endif
 333 }
 334
 335 /*****************************************************************************
 336  * vlc_mutex_destroy: destroy a mutex, inner version
 337  *****************************************************************************/
 338 int __vlc_mutex_destroy( const char * psz_file, int i_line, vlc_mutex_t *p_mutex )
 339 {
 340     int i_result;
 341     /* In case of error : */
 342     int i_thread = -1;
 343     const char * psz_error = "";
 344
 345 #if defined( PTH_INIT_IN_PTH_H )
 346     return 0;
 347
 348 #elif defined( ST_INIT_IN_ST_H )
 349     i_result = st_mutex_destroy( p_mutex->mutex );
 350
 351 #elif defined( UNDER_CE )
 352     DeleteCriticalSection( &p_mutex->csection );
 353     return 0;
 354
 355 #elif defined( WIN32 )
 356     if( p_mutex->mutex )
 357     {
 358         CloseHandle( p_mutex->mutex );
 359     }
 360     else
 361     {
 362         DeleteCriticalSection( &p_mutex->csection );
 363     }
 364     return 0;
 365
 366 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 367     if( p_mutex->init == 9999 )
 368     {
 369         delete_sem( p_mutex->lock );
 370     }
 371
 372     p_mutex->init = 0;
 373     return B_OK;
 374
 375 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 376     i_result = pthread_mutex_destroy( &p_mutex->mutex );
 377     if( i_result )
 378     {
 379         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 380         psz_error = strerror(i_result);
 381     }
 382
 383 #elif defined( HAVE_CTHREADS_H )
 384     return 0;
 385
 386 #endif
 387
 388     if( i_result )
 389     {
 390         msg_Err( p_mutex->p_this,
 391                  "thread %d: mutex_destroy failed at %s:%d (%d:%s)",
 392                  i_thread, psz_file, i_line, i_result, psz_error );
 393     }
 394     return i_result;
 395 }
 396
 397 /*****************************************************************************
 398  * vlc_cond_init: initialize a condition
 399  *****************************************************************************/
 400 int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar )
 401 {
 402     p_condvar->p_this = p_this;
 403
 404 #if defined( PTH_INIT_IN_PTH_H )
 405     return ( pth_cond_init( &p_condvar->cond ) == FALSE );
 406
 407 #elif defined( ST_INIT_IN_ST_H )
 408     p_condvar->cond = st_cond_new();
 409     return ( p_condvar->cond == NULL ) ? errno : 0;
 410
 411 #elif defined( UNDER_CE )
 412     /* Initialize counter */
 413     p_condvar->i_waiting_threads = 0;
 414
 415     /* Create an auto-reset event. */
 416     p_condvar->event = CreateEvent( NULL,   /* no security */
 417                                     FALSE,  /* auto-reset event */
 418                                     FALSE,  /* start non-signaled */
 419                                     NULL ); /* unnamed */
 420     return !p_condvar->event;
 421
 422 #elif defined( WIN32 )
 423     /* Initialize counter */
 424     p_condvar->i_waiting_threads = 0;
 425
 426     /* Misc init */
 427     p_condvar->i_win9x_cv = i_win9x_cv;
 428     p_condvar->SignalObjectAndWait = pf_SignalObjectAndWait;
 429
 430     if( (p_condvar->SignalObjectAndWait && !b_fast_mutex)
 431         || p_condvar->i_win9x_cv == 0 )
 432     {
 433         /* Create an auto-reset event. */
 434         p_condvar->event = CreateEvent( NULL,   /* no security */
 435                                         FALSE,  /* auto-reset event */
 436                                         FALSE,  /* start non-signaled */
 437                                         NULL ); /* unnamed */
 438
 439         p_condvar->semaphore = NULL;
 440         return !p_condvar->event;
 441     }
 442     else
 443     {
 444         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
 445                                                 0,          /* initial count */
 446                                                 0x7fffffff, /* max count */
 447                                                 NULL );     /* unnamed */
 448
 449         if( p_condvar->i_win9x_cv == 1 )
 450             /* Create a manual-reset event initially signaled. */
 451             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
 452         else
 453             /* Create a auto-reset event. */
 454             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
 455
 456         InitializeCriticalSection( &p_condvar->csection );
 457
 458         return !p_condvar->semaphore || !p_condvar->event;
 459     }
 460
 461 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 462     if( !p_condvar )
 463     {
 464         return B_BAD_VALUE;
 465     }
 466
 467     if( p_condvar->init == 9999 )
 468     {
 469         return EALREADY;
 470     }
 471
 472     p_condvar->thread = -1;
 473     p_condvar->init = 9999;
 474     return 0;
 475
 476 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 477     pthread_condattr_t attr;
 478     int ret;
 479
 480     ret = pthread_condattr_init (&attr);
 481     if (ret)
 482         return ret;
 483
 484 # if defined (_POSIX_CLOCK_SELECTION) && (_POSIX_CLOCK_SELECTION - 0 > 0)
 485     /* NOTE: This must be the same clock as the one in mtime.c */
 486     pthread_condattr_setclock (&attr, CLOCK_MONOTONIC);
 487 # endif
 488
 489     ret = pthread_cond_init (&p_condvar->cond, &attr);
 490     pthread_condattr_destroy (&attr);
 491     return ret;
 492
 493 #elif defined( HAVE_CTHREADS_H )
 494     /* condition_init() */
 495     spin_lock_init( &p_condvar->lock );
 496     cthread_queue_init( &p_condvar->queue );
 497     p_condvar->name = 0;
 498     p_condvar->implications = 0;
 499
 500     return 0;
 501
 502 #endif
 503 }
 504
 505 /*****************************************************************************
 506  * vlc_cond_destroy: destroy a condition, inner version
 507  *****************************************************************************/
 508 int __vlc_cond_destroy( const char * psz_file, int i_line, vlc_cond_t *p_condvar )
 509 {
 510     int i_result;
 511     /* In case of error : */
 512     int i_thread = -1;
 513     const char * psz_error = "";
 514
 515 #if defined( PTH_INIT_IN_PTH_H )
 516     return 0;
 517
 518 #elif defined( ST_INIT_IN_ST_H )
 519     i_result = st_cond_destroy( p_condvar->cond );
 520
 521 #elif defined( UNDER_CE )
 522     i_result = !CloseHandle( p_condvar->event );
 523
 524 #elif defined( WIN32 )
 525     if( !p_condvar->semaphore )
 526         i_result = !CloseHandle( p_condvar->event );
 527     else
 528         i_result = !CloseHandle( p_condvar->event )
 529           || !CloseHandle( p_condvar->semaphore );
 530
 531     if( p_condvar->semaphore != NULL )
 532         DeleteCriticalSection( &p_condvar->csection );
 533
 534 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 535     p_condvar->init = 0;
 536     return 0;
 537
 538 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 539     i_result = pthread_cond_destroy( &p_condvar->cond );
 540     if( i_result )
 541     {
 542         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 543         psz_error = strerror(i_result);
 544     }
 545
 546 #elif defined( HAVE_CTHREADS_H )
 547     return 0;
 548
 549 #endif
 550
 551     if( i_result )
 552     {
 553         msg_Err( p_condvar->p_this,
 554                  "thread %d: cond_destroy failed at %s:%d (%d:%s)",
 555                  i_thread, psz_file, i_line, i_result, psz_error );
 556     }
 557     return i_result;
 558 }
 559
 560 /*****************************************************************************
 561  * vlc_tls_create: create a thread-local variable
 562  *****************************************************************************/
 563 int __vlc_threadvar_create( vlc_object_t *p_this, vlc_threadvar_t *p_tls )
 564 {
 565     int i_ret = -1;
 566     (void)p_this;
 567 #if defined( PTH_INIT_IN_PTH_H )
 568     i_ret = pth_key_create( &p_tls->handle, NULL );
 569 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 570     msg_Err( p_this, "TLS not implemented" );
 571     i_ret VLC_EGENERIC;
 572 #elif defined( ST_INIT_IN_ST_H )
 573     i_ret = st_key_create( &p_tls->handle, NULL );
 574 #elif defined( UNDER_CE ) || defined( WIN32 )
 575 #elif defined( WIN32 )
 576     p_tls->handle = TlsAlloc();
 577     i_ret = !( p_tls->handle == 0xFFFFFFFF );
 578
 579 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 580     i_ret =  pthread_key_create( &p_tls->handle, NULL );
 581 #elif defined( HAVE_CTHREADS_H )
 582     i_ret = cthread_keycreate( &p_tls-handle );
 583 #endif
 584     return i_ret;
 585 }
 586
 587 /*****************************************************************************
 588  * vlc_thread_create: create a thread, inner version
 589  *****************************************************************************
 590  * Note that i_priority is only taken into account on platforms supporting
 591  * userland real-time priority threads.
 592  *****************************************************************************/
 593 int __vlc_thread_create( vlc_object_t *p_this, const char * psz_file, int i_line,
 594                          const char *psz_name, void * ( *func ) ( void * ),
 595                          int i_priority, vlc_bool_t b_wait )
 596 {
 597     int i_ret;
 598     void *p_data = (void *)p_this;
 599     vlc_object_internals_t *p_priv = p_this->p_internals;
 600
 601     vlc_mutex_lock( &p_this->object_lock );
 602
 603 #if defined( PTH_INIT_IN_PTH_H )
 604     p_priv->thread_id = pth_spawn( PTH_ATTR_DEFAULT, func, p_data );
 605     i_ret = p_priv->thread_id == NULL;
 606
 607 #elif defined( ST_INIT_IN_ST_H )
 608     p_priv->thread_id = st_thread_create( func, p_data, 1, 0 );
 609     i_ret = 0;
 610
 611 #elif defined( WIN32 ) || defined( UNDER_CE )
 612     {
 613         /* When using the MSVCRT C library you have to use the _beginthreadex
 614          * function instead of CreateThread, otherwise you'll end up with
 615          * memory leaks and the signal functions not working (see Microsoft
 616          * Knowledge Base, article 104641) */
 617 #if defined( UNDER_CE )
 618         DWORD  threadId;
 619         HANDLE hThread = CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE)func,
 620                                       (LPVOID)p_data, CREATE_SUSPENDED,
 621                       &threadId );
 622 #else
 623         unsigned threadId;
 624         uintptr_t hThread = _beginthreadex( NULL, 0,
 625                         (LPTHREAD_START_ROUTINE)func,
 626                                             (void*)p_data, CREATE_SUSPENDED,
 627                         &threadId );
 628 #endif
 629         p_priv->thread_id.id = (DWORD)threadId;
 630         p_priv->thread_id.hThread = (HANDLE)hThread;
 631     ResumeThread((HANDLE)hThread);
 632     }
 633
 634     i_ret = ( p_priv->thread_id.hThread ? 0 : 1 );
 635
 636     if( i_ret && i_priority )
 637     {
 638         if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
 639         {
 640             msg_Warn( p_this, "couldn't set a faster priority" );
 641             i_priority = 0;
 642         }
 643     }
 644
 645 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 646     p_priv->thread_id = spawn_thread( (thread_func)func, psz_name,
 647                                       i_priority, p_data );
 648     i_ret = resume_thread( p_priv->thread_id );
 649
 650 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 651     i_ret = pthread_create( &p_priv->thread_id, NULL, func, p_data );
 652
 653 #ifndef __APPLE__
 654     if( config_GetInt( p_this, "rt-priority" ) )
 655 #endif
 656     {
 657         int i_error, i_policy;
 658         struct sched_param param;
 659
 660         memset( &param, 0, sizeof(struct sched_param) );
 661         if( config_GetType( p_this, "rt-offset" ) )
 662         {
 663             i_priority += config_GetInt( p_this, "rt-offset" );
 664         }
 665         if( i_priority <= 0 )
 666         {
 667             param.sched_priority = (-1) * i_priority;
 668             i_policy = SCHED_OTHER;
 669         }
 670         else
 671         {
 672             param.sched_priority = i_priority;
 673             i_policy = SCHED_RR;
 674         }
 675         if( (i_error = pthread_setschedparam( p_priv->thread_id,
 676                                                i_policy, &param )) )
 677         {
 678             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s",
 679                       psz_file, i_line, strerror(i_error) );
 680             i_priority = 0;
 681         }
 682     }
 683 #ifndef __APPLE__
 684     else
 685     {
 686         i_priority = 0;
 687     }
 688 #endif
 689
 690 #elif defined( HAVE_CTHREADS_H )
 691     p_priv->thread_id = cthread_fork( (cthread_fn_t)func, (any_t)p_data );
 692     i_ret = 0;
 693
 694 #endif
 695
 696     if( i_ret == 0 )
 697     {
 698         if( b_wait )
 699         {
 700             msg_Dbg( p_this, "waiting for thread completion" );
 701             vlc_object_wait( p_this );
 702         }
 703
 704         p_priv->b_thread = VLC_TRUE;
 705
 706 #if defined( WIN32 ) || defined( UNDER_CE )
 707         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 708                  (unsigned int)p_priv->thread_id.id, psz_name,
 709          i_priority, psz_file, i_line );
 710 #else
 711         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 712                  (unsigned int)p_priv->thread_id, psz_name, i_priority,
 713                  psz_file, i_line );
 714 #endif
 715
 716
 717         vlc_mutex_unlock( &p_this->object_lock );
 718     }
 719     else
 720     {
 721         msg_Err( p_this, "%s thread could not be created at %s:%d (%s)",
 722                          psz_name, psz_file, i_line, strerror(i_ret) );
 723         vlc_mutex_unlock( &p_this->object_lock );
 724     }
 725
 726     return i_ret;
 727 }
 728
 729 /*****************************************************************************
 730  * vlc_thread_set_priority: set the priority of the current thread when we
 731  * couldn't set it in vlc_thread_create (for instance for the main thread)
 732  *****************************************************************************/
 733 int __vlc_thread_set_priority( vlc_object_t *p_this, const char * psz_file,
 734                                int i_line, int i_priority )
 735 {
 736     vlc_object_internals_t *p_priv = p_this->p_internals;
 737 #if defined( PTH_INIT_IN_PTH_H ) || defined( ST_INIT_IN_ST_H )
 738 #elif defined( WIN32 ) || defined( UNDER_CE )
 739     if( !p_priv->thread_id.hThread )
 740         p_priv->thread_id.hThread = GetCurrentThread();
 741     if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
 742     {
 743         msg_Warn( p_this, "couldn't set a faster priority" );
 744         return 1;
 745     }
 746
 747 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 748 # ifndef __APPLE__
 749     if( config_GetInt( p_this, "rt-priority" ) > 0 )
 750 # endif
 751     {
 752         int i_error, i_policy;
 753         struct sched_param param;
 754
 755         memset( &param, 0, sizeof(struct sched_param) );
 756         if( config_GetType( p_this, "rt-offset" ) )
 757         {
 758             i_priority += config_GetInt( p_this, "rt-offset" );
 759         }
 760         if( i_priority <= 0 )
 761         {
 762             param.sched_priority = (-1) * i_priority;
 763             i_policy = SCHED_OTHER;
 764         }
 765         else
 766         {
 767             param.sched_priority = i_priority;
 768             i_policy = SCHED_RR;
 769         }
 770         if( !p_priv->thread_id )
 771             p_priv->thread_id = pthread_self();
 772         if( (i_error = pthread_setschedparam( p_priv->thread_id,
 773                                                i_policy, &param )) )
 774         {
 775             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s",
 776                       psz_file, i_line, strerror(i_error) );
 777             i_priority = 0;
 778         }
 779     }
 780 #endif
 781
 782     return 0;
 783 }
 784
 785 /*****************************************************************************
 786  * vlc_thread_ready: tell the parent thread we were successfully spawned
 787  *****************************************************************************/
 788 void __vlc_thread_ready( vlc_object_t *p_this )
 789 {
 790     vlc_object_signal( p_this );
 791 }
 792
 793 /*****************************************************************************
 794  * vlc_thread_join: wait until a thread exits, inner version
 795  *****************************************************************************/
 796 void __vlc_thread_join( vlc_object_t *p_this, const char * psz_file, int i_line )
 797 {
 798     vlc_object_internals_t *p_priv = p_this->p_internals;
 799
 800 #if defined( UNDER_CE ) || defined( WIN32 )
 801     HMODULE hmodule;
 802     BOOL (WINAPI *OurGetThreadTimes)( HANDLE, FILETIME*, FILETIME*,
 803                                       FILETIME*, FILETIME* );
 804     FILETIME create_ft, exit_ft, kernel_ft, user_ft;
 805     int64_t real_time, kernel_time, user_time;
 806     HANDLE hThread;
 807
 808     /*
 809     ** object will close its thread handle when destroyed, duplicate it here
 810     ** to be on the safe side
 811     */
 812     if( ! DuplicateHandle(GetCurrentProcess(),
 813             p_priv->thread_id.hThread,
 814             GetCurrentProcess(),
 815             &hThread,
 816             0,
 817             FALSE,
 818             DUPLICATE_SAME_ACCESS) )
 819     {
 820         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%s)",
 821                          (unsigned int)p_priv->thread_id.id,
 822              psz_file, i_line, GetLastError() );
 823         p_priv->b_thread = VLC_FALSE;
 824         return;
 825     }
 826
 827     WaitForSingleObject( hThread, INFINITE );
 828
 829     msg_Dbg( p_this, "thread %u joined (%s:%d)",
 830              (unsigned int)p_priv->thread_id.id,
 831              psz_file, i_line );
 832 #if defined( UNDER_CE )
 833     hmodule = GetModuleHandle( _T("COREDLL") );
 834 #else
 835     hmodule = GetModuleHandle( _T("KERNEL32") );
 836 #endif
 837     OurGetThreadTimes = (BOOL (WINAPI*)( HANDLE, FILETIME*, FILETIME*,
 838                                          FILETIME*, FILETIME* ))
 839         GetProcAddress( hmodule, _T("GetThreadTimes") );
 840
 841     if( OurGetThreadTimes &&
 842         OurGetThreadTimes( hThread,
 843                            &create_ft, &exit_ft, &kernel_ft, &user_ft ) )
 844     {
 845         real_time =
 846           ((((int64_t)exit_ft.dwHighDateTime)<<32)| exit_ft.dwLowDateTime) -
 847           ((((int64_t)create_ft.dwHighDateTime)<<32)| create_ft.dwLowDateTime);
 848         real_time /= 10;
 849
 850         kernel_time =
 851           ((((int64_t)kernel_ft.dwHighDateTime)<<32)|
 852            kernel_ft.dwLowDateTime) / 10;
 853
 854         user_time =
 855           ((((int64_t)user_ft.dwHighDateTime)<<32)|
 856            user_ft.dwLowDateTime) / 10;
 857
 858         msg_Dbg( p_this, "thread times: "
 859                  "real "I64Fd"m%fs, kernel "I64Fd"m%fs, user "I64Fd"m%fs",
 860                  real_time/60/1000000,
 861                  (double)((real_time%(60*1000000))/1000000.0),
 862                  kernel_time/60/1000000,
 863                  (double)((kernel_time%(60*1000000))/1000000.0),
 864                  user_time/60/1000000,
 865                  (double)((user_time%(60*1000000))/1000000.0) );
 866     }
 867     CloseHandle( hThread );
 868
 869 #else /* !defined(WIN32) */
 870
 871     int i_ret = 0;
 872
 873 #if defined( PTH_INIT_IN_PTH_H )
 874     i_ret = ( pth_join( p_priv->thread_id, NULL ) == FALSE );
 875
 876 #elif defined( ST_INIT_IN_ST_H )
 877     i_ret = st_thread_join( p_priv->thread_id, NULL );
 878
 879 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 880     int32_t exit_value;
 881     i_ret = (B_OK == wait_for_thread( p_priv->thread_id, &exit_value ));
 882
 883 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 884     i_ret = pthread_join( p_priv->thread_id, NULL );
 885
 886 #elif defined( HAVE_CTHREADS_H )
 887     cthread_join( p_priv->thread_id );
 888     i_ret = 1;
 889
 890 #endif
 891
 892     if( i_ret )
 893     {
 894         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%s)",
 895                          (unsigned int)p_priv->thread_id, psz_file, i_line,
 896                          strerror(i_ret) );
 897     }
 898     else
 899     {
 900         msg_Dbg( p_this, "thread %u joined (%s:%d)",
 901                          (unsigned int)p_priv->thread_id, psz_file, i_line );
 902     }
 903
 904 #endif
 905
 906     p_priv->b_thread = VLC_FALSE;
 907 }
 908