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     {
 301         /* Create error-checking mutex to detect problems more easily. */
 302         pthread_mutexattr_t attr;
 303         int                 i_result;
 304
 305         pthread_mutexattr_init( &attr );
 306 #   if defined(SYS_LINUX)
 307         pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 308 #   else
 309         pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
 310 #   endif
 311         i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 312         pthread_mutexattr_destroy( &attr );
 313         return( i_result );
 314     }
 315 # endif
 316     return pthread_mutex_init( &p_mutex->mutex, NULL );
 317
 318 #elif defined( HAVE_CTHREADS_H )
 319     mutex_init( p_mutex );
 320     return 0;
 321
 322 #endif
 323 }
 324
 325 /*****************************************************************************
 326  * vlc_mutex_destroy: destroy a mutex, inner version
 327  *****************************************************************************/
 328 int __vlc_mutex_destroy( const char * psz_file, int i_line, vlc_mutex_t *p_mutex )
 329 {
 330     int i_result;
 331     /* In case of error : */
 332     int i_thread = -1;
 333     const char * psz_error = "";
 334
 335 #if defined( PTH_INIT_IN_PTH_H )
 336     return 0;
 337
 338 #elif defined( ST_INIT_IN_ST_H )
 339     i_result = st_mutex_destroy( p_mutex->mutex );
 340
 341 #elif 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         psz_error = strerror(i_result);
 371     }
 372
 373 #elif defined( HAVE_CTHREADS_H )
 374     return 0;
 375
 376 #endif
 377
 378     if( i_result )
 379     {
 380         msg_Err( p_mutex->p_this,
 381                  "thread %d: mutex_destroy failed at %s:%d (%d:%s)",
 382                  i_thread, psz_file, i_line, i_result, psz_error );
 383     }
 384     return i_result;
 385 }
 386
 387 /*****************************************************************************
 388  * vlc_cond_init: initialize a condition
 389  *****************************************************************************/
 390 int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar )
 391 {
 392     p_condvar->p_this = p_this;
 393
 394 #if defined( PTH_INIT_IN_PTH_H )
 395     return ( pth_cond_init( &p_condvar->cond ) == FALSE );
 396
 397 #elif defined( ST_INIT_IN_ST_H )
 398     p_condvar->cond = st_cond_new();
 399     return ( p_condvar->cond == NULL ) ? errno : 0;
 400
 401 #elif defined( UNDER_CE )
 402     /* Initialize counter */
 403     p_condvar->i_waiting_threads = 0;
 404
 405     /* Create an auto-reset event. */
 406     p_condvar->event = CreateEvent( NULL,   /* no security */
 407                                     FALSE,  /* auto-reset event */
 408                                     FALSE,  /* start non-signaled */
 409                                     NULL ); /* unnamed */
 410     return !p_condvar->event;
 411
 412 #elif defined( WIN32 )
 413     /* Initialize counter */
 414     p_condvar->i_waiting_threads = 0;
 415
 416     /* Misc init */
 417     p_condvar->i_win9x_cv = i_win9x_cv;
 418     p_condvar->SignalObjectAndWait = pf_SignalObjectAndWait;
 419
 420     if( (p_condvar->SignalObjectAndWait && !b_fast_mutex)
 421         || p_condvar->i_win9x_cv == 0 )
 422     {
 423         /* Create an auto-reset event. */
 424         p_condvar->event = CreateEvent( NULL,   /* no security */
 425                                         FALSE,  /* auto-reset event */
 426                                         FALSE,  /* start non-signaled */
 427                                         NULL ); /* unnamed */
 428
 429         p_condvar->semaphore = NULL;
 430         return !p_condvar->event;
 431     }
 432     else
 433     {
 434         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
 435                                                 0,          /* initial count */
 436                                                 0x7fffffff, /* max count */
 437                                                 NULL );     /* unnamed */
 438
 439         if( p_condvar->i_win9x_cv == 1 )
 440             /* Create a manual-reset event initially signaled. */
 441             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
 442         else
 443             /* Create a auto-reset event. */
 444             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
 445
 446         InitializeCriticalSection( &p_condvar->csection );
 447
 448         return !p_condvar->semaphore || !p_condvar->event;
 449     }
 450
 451 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 452     if( !p_condvar )
 453     {
 454         return B_BAD_VALUE;
 455     }
 456
 457     if( p_condvar->init == 9999 )
 458     {
 459         return EALREADY;
 460     }
 461
 462     p_condvar->thread = -1;
 463     p_condvar->init = 9999;
 464     return 0;
 465
 466 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 467     pthread_condattr_t attr;
 468     int ret;
 469
 470     ret = pthread_condattr_init (&attr);
 471     if (ret)
 472         return ret;
 473
 474 # if defined (_POSIX_CLOCK_SELECTION) && (_POSIX_CLOCK_SELECTION - 0 > 0)
 475     /* NOTE: This must be the same clock as the one in mtime.c */
 476     pthread_condattr_setclock (&attr, CLOCK_MONOTONIC);
 477 # endif
 478
 479     ret = pthread_cond_init (&p_condvar->cond, &attr);
 480     pthread_condattr_destroy (&attr);
 481     return ret;
 482
 483 #elif defined( HAVE_CTHREADS_H )
 484     /* condition_init() */
 485     spin_lock_init( &p_condvar->lock );
 486     cthread_queue_init( &p_condvar->queue );
 487     p_condvar->name = 0;
 488     p_condvar->implications = 0;
 489
 490     return 0;
 491
 492 #endif
 493 }
 494
 495 /*****************************************************************************
 496  * vlc_cond_destroy: destroy a condition, inner version
 497  *****************************************************************************/
 498 int __vlc_cond_destroy( const char * psz_file, int i_line, vlc_cond_t *p_condvar )
 499 {
 500     int i_result;
 501     /* In case of error : */
 502     int i_thread = -1;
 503     const char * psz_error = "";
 504
 505 #if defined( PTH_INIT_IN_PTH_H )
 506     return 0;
 507
 508 #elif defined( ST_INIT_IN_ST_H )
 509     i_result = st_cond_destroy( p_condvar->cond );
 510
 511 #elif defined( UNDER_CE )
 512     i_result = !CloseHandle( p_condvar->event );
 513
 514 #elif defined( WIN32 )
 515     if( !p_condvar->semaphore )
 516         i_result = !CloseHandle( p_condvar->event );
 517     else
 518         i_result = !CloseHandle( p_condvar->event )
 519           || !CloseHandle( p_condvar->semaphore );
 520
 521     if( p_condvar->semaphore != NULL )
 522         DeleteCriticalSection( &p_condvar->csection );
 523
 524 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 525     p_condvar->init = 0;
 526     return 0;
 527
 528 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 529     i_result = pthread_cond_destroy( &p_condvar->cond );
 530     if( i_result )
 531     {
 532         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 533         psz_error = strerror(i_result);
 534     }
 535
 536 #elif defined( HAVE_CTHREADS_H )
 537     return 0;
 538
 539 #endif
 540
 541     if( i_result )
 542     {
 543         msg_Err( p_condvar->p_this,
 544                  "thread %d: cond_destroy failed at %s:%d (%d:%s)",
 545                  i_thread, psz_file, i_line, i_result, psz_error );
 546     }
 547     return i_result;
 548 }
 549
 550 /*****************************************************************************
 551  * vlc_tls_create: create a thread-local variable
 552  *****************************************************************************/
 553 int __vlc_threadvar_create( vlc_object_t *p_this, vlc_threadvar_t *p_tls )
 554 {
 555     int i_ret = -1;
 556     (void)p_this;
 557 #if defined( PTH_INIT_IN_PTH_H )
 558     i_ret = pth_key_create( &p_tls->handle, NULL );
 559 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 560     msg_Err( p_this, "TLS not implemented" );
 561     i_ret VLC_EGENERIC;
 562 #elif defined( ST_INIT_IN_ST_H )
 563     i_ret = st_key_create( &p_tls->handle, NULL );
 564 #elif defined( UNDER_CE ) || defined( WIN32 )
 565 #elif defined( WIN32 )
 566     p_tls->handle = TlsAlloc();
 567     i_ret = !( p_tls->handle == 0xFFFFFFFF );
 568
 569 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 570     i_ret =  pthread_key_create( &p_tls->handle, NULL );
 571 #elif defined( HAVE_CTHREADS_H )
 572     i_ret = cthread_keycreate( &p_tls-handle );
 573 #endif
 574     return i_ret;
 575 }
 576
 577 /*****************************************************************************
 578  * vlc_thread_create: create a thread, inner version
 579  *****************************************************************************
 580  * Note that i_priority is only taken into account on platforms supporting
 581  * userland real-time priority threads.
 582  *****************************************************************************/
 583 int __vlc_thread_create( vlc_object_t *p_this, const char * psz_file, int i_line,
 584                          const char *psz_name, void * ( *func ) ( void * ),
 585                          int i_priority, vlc_bool_t b_wait )
 586 {
 587     int i_ret;
 588     void *p_data = (void *)p_this;
 589     vlc_object_internals_t *p_priv = p_this->p_internals;
 590
 591     vlc_mutex_lock( &p_this->object_lock );
 592
 593 #if defined( PTH_INIT_IN_PTH_H )
 594     p_priv->thread_id = pth_spawn( PTH_ATTR_DEFAULT, func, p_data );
 595     i_ret = p_priv->thread_id == NULL;
 596
 597 #elif defined( ST_INIT_IN_ST_H )
 598     p_priv->thread_id = st_thread_create( func, p_data, 1, 0 );
 599     i_ret = 0;
 600
 601 #elif defined( WIN32 ) || defined( UNDER_CE )
 602     {
 603         /* When using the MSVCRT C library you have to use the _beginthreadex
 604          * function instead of CreateThread, otherwise you'll end up with
 605          * memory leaks and the signal functions not working (see Microsoft
 606          * Knowledge Base, article 104641) */
 607 #if defined( UNDER_CE )
 608         DWORD  threadId;
 609         HANDLE hThread = CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE)func,
 610                                       (LPVOID)p_data, CREATE_SUSPENDED,
 611                       &threadId );
 612 #else
 613         unsigned threadId;
 614         uintptr_t hThread = _beginthreadex( NULL, 0,
 615                         (LPTHREAD_START_ROUTINE)func,
 616                                             (void*)p_data, CREATE_SUSPENDED,
 617                         &threadId );
 618 #endif
 619         p_priv->thread_id.id = (DWORD)threadId;
 620         p_priv->thread_id.hThread = (HANDLE)hThread;
 621     ResumeThread((HANDLE)hThread);
 622     }
 623
 624     i_ret = ( p_priv->thread_id.hThread ? 0 : 1 );
 625
 626     if( i_ret && i_priority )
 627     {
 628         if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
 629         {
 630             msg_Warn( p_this, "couldn't set a faster priority" );
 631             i_priority = 0;
 632         }
 633     }
 634
 635 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 636     p_priv->thread_id = spawn_thread( (thread_func)func, psz_name,
 637                                       i_priority, p_data );
 638     i_ret = resume_thread( p_priv->thread_id );
 639
 640 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 641     i_ret = pthread_create( &p_priv->thread_id, NULL, func, p_data );
 642
 643 #ifndef __APPLE__
 644     if( config_GetInt( p_this, "rt-priority" ) )
 645 #endif
 646     {
 647         int i_error, i_policy;
 648         struct sched_param param;
 649
 650         memset( &param, 0, sizeof(struct sched_param) );
 651         if( config_GetType( p_this, "rt-offset" ) )
 652         {
 653             i_priority += config_GetInt( p_this, "rt-offset" );
 654         }
 655         if( i_priority <= 0 )
 656         {
 657             param.sched_priority = (-1) * i_priority;
 658             i_policy = SCHED_OTHER;
 659         }
 660         else
 661         {
 662             param.sched_priority = i_priority;
 663             i_policy = SCHED_RR;
 664         }
 665         if( (i_error = pthread_setschedparam( p_priv->thread_id,
 666                                                i_policy, &param )) )
 667         {
 668             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s",
 669                       psz_file, i_line, strerror(i_error) );
 670             i_priority = 0;
 671         }
 672     }
 673 #ifndef __APPLE__
 674     else
 675     {
 676         i_priority = 0;
 677     }
 678 #endif
 679
 680 #elif defined( HAVE_CTHREADS_H )
 681     p_priv->thread_id = cthread_fork( (cthread_fn_t)func, (any_t)p_data );
 682     i_ret = 0;
 683
 684 #endif
 685
 686     if( i_ret == 0 )
 687     {
 688         if( b_wait )
 689         {
 690             msg_Dbg( p_this, "waiting for thread completion" );
 691             vlc_object_wait( p_this );
 692         }
 693
 694         p_priv->b_thread = VLC_TRUE;
 695
 696 #if defined( WIN32 ) || defined( UNDER_CE )
 697         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 698                  (unsigned int)p_priv->thread_id.id, psz_name,
 699          i_priority, psz_file, i_line );
 700 #else
 701         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 702                  (unsigned int)p_priv->thread_id, psz_name, i_priority,
 703                  psz_file, i_line );
 704 #endif
 705
 706
 707         vlc_mutex_unlock( &p_this->object_lock );
 708     }
 709     else
 710     {
 711         msg_Err( p_this, "%s thread could not be created at %s:%d (%s)",
 712                          psz_name, psz_file, i_line, strerror(i_ret) );
 713         vlc_mutex_unlock( &p_this->object_lock );
 714     }
 715
 716     return i_ret;
 717 }
 718
 719 /*****************************************************************************
 720  * vlc_thread_set_priority: set the priority of the current thread when we
 721  * couldn't set it in vlc_thread_create (for instance for the main thread)
 722  *****************************************************************************/
 723 int __vlc_thread_set_priority( vlc_object_t *p_this, const char * psz_file,
 724                                int i_line, int i_priority )
 725 {
 726     vlc_object_internals_t *p_priv = p_this->p_internals;
 727 #if defined( PTH_INIT_IN_PTH_H ) || defined( ST_INIT_IN_ST_H )
 728 #elif defined( WIN32 ) || defined( UNDER_CE )
 729     if( !p_priv->thread_id.hThread )
 730         p_priv->thread_id.hThread = GetCurrentThread();
 731     if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
 732     {
 733         msg_Warn( p_this, "couldn't set a faster priority" );
 734         return 1;
 735     }
 736
 737 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 738 # ifndef __APPLE__
 739     if( config_GetInt( p_this, "rt-priority" ) > 0 )
 740 # endif
 741     {
 742         int i_error, i_policy;
 743         struct sched_param param;
 744
 745         memset( &param, 0, sizeof(struct sched_param) );
 746         if( config_GetType( p_this, "rt-offset" ) )
 747         {
 748             i_priority += config_GetInt( p_this, "rt-offset" );
 749         }
 750         if( i_priority <= 0 )
 751         {
 752             param.sched_priority = (-1) * i_priority;
 753             i_policy = SCHED_OTHER;
 754         }
 755         else
 756         {
 757             param.sched_priority = i_priority;
 758             i_policy = SCHED_RR;
 759         }
 760         if( !p_priv->thread_id )
 761             p_priv->thread_id = pthread_self();
 762         if( (i_error = pthread_setschedparam( p_priv->thread_id,
 763                                                i_policy, &param )) )
 764         {
 765             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %s",
 766                       psz_file, i_line, strerror(i_error) );
 767             i_priority = 0;
 768         }
 769     }
 770 #endif
 771
 772     return 0;
 773 }
 774
 775 /*****************************************************************************
 776  * vlc_thread_ready: tell the parent thread we were successfully spawned
 777  *****************************************************************************/
 778 void __vlc_thread_ready( vlc_object_t *p_this )
 779 {
 780     vlc_object_signal( p_this );
 781 }
 782
 783 /*****************************************************************************
 784  * vlc_thread_join: wait until a thread exits, inner version
 785  *****************************************************************************/
 786 void __vlc_thread_join( vlc_object_t *p_this, const char * psz_file, int i_line )
 787 {
 788     vlc_object_internals_t *p_priv = p_this->p_internals;
 789
 790 #if defined( UNDER_CE ) || defined( WIN32 )
 791     HMODULE hmodule;
 792     BOOL (WINAPI *OurGetThreadTimes)( HANDLE, FILETIME*, FILETIME*,
 793                                       FILETIME*, FILETIME* );
 794     FILETIME create_ft, exit_ft, kernel_ft, user_ft;
 795     int64_t real_time, kernel_time, user_time;
 796     HANDLE hThread;
 797
 798     /*
 799     ** object will close its thread handle when destroyed, duplicate it here
 800     ** to be on the safe side
 801     */
 802     if( ! DuplicateHandle(GetCurrentProcess(),
 803             p_priv->thread_id.hThread,
 804             GetCurrentProcess(),
 805             &hThread,
 806             0,
 807             FALSE,
 808             DUPLICATE_SAME_ACCESS) )
 809     {
 810         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%s)",
 811                          (unsigned int)p_priv->thread_id.id,
 812              psz_file, i_line, GetLastError() );
 813         p_priv->b_thread = VLC_FALSE;
 814         return;
 815     }
 816
 817     WaitForSingleObject( hThread, INFINITE );
 818
 819     msg_Dbg( p_this, "thread %u joined (%s:%d)",
 820              (unsigned int)p_priv->thread_id.id,
 821              psz_file, i_line );
 822 #if defined( UNDER_CE )
 823     hmodule = GetModuleHandle( _T("COREDLL") );
 824 #else
 825     hmodule = GetModuleHandle( _T("KERNEL32") );
 826 #endif
 827     OurGetThreadTimes = (BOOL (WINAPI*)( HANDLE, FILETIME*, FILETIME*,
 828                                          FILETIME*, FILETIME* ))
 829         GetProcAddress( hmodule, _T("GetThreadTimes") );
 830
 831     if( OurGetThreadTimes &&
 832         OurGetThreadTimes( hThread,
 833                            &create_ft, &exit_ft, &kernel_ft, &user_ft ) )
 834     {
 835         real_time =
 836           ((((int64_t)exit_ft.dwHighDateTime)<<32)| exit_ft.dwLowDateTime) -
 837           ((((int64_t)create_ft.dwHighDateTime)<<32)| create_ft.dwLowDateTime);
 838         real_time /= 10;
 839
 840         kernel_time =
 841           ((((int64_t)kernel_ft.dwHighDateTime)<<32)|
 842            kernel_ft.dwLowDateTime) / 10;
 843
 844         user_time =
 845           ((((int64_t)user_ft.dwHighDateTime)<<32)|
 846            user_ft.dwLowDateTime) / 10;
 847
 848         msg_Dbg( p_this, "thread times: "
 849                  "real "I64Fd"m%fs, kernel "I64Fd"m%fs, user "I64Fd"m%fs",
 850                  real_time/60/1000000,
 851                  (double)((real_time%(60*1000000))/1000000.0),
 852                  kernel_time/60/1000000,
 853                  (double)((kernel_time%(60*1000000))/1000000.0),
 854                  user_time/60/1000000,
 855                  (double)((user_time%(60*1000000))/1000000.0) );
 856     }
 857     CloseHandle( hThread );
 858
 859 #else /* !defined(WIN32) */
 860
 861     int i_ret = 0;
 862
 863 #if defined( PTH_INIT_IN_PTH_H )
 864     i_ret = ( pth_join( p_priv->thread_id, NULL ) == FALSE );
 865
 866 #elif defined( ST_INIT_IN_ST_H )
 867     i_ret = st_thread_join( p_priv->thread_id, NULL );
 868
 869 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 870     int32_t exit_value;
 871     i_ret = (B_OK == wait_for_thread( p_priv->thread_id, &exit_value ));
 872
 873 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 874     i_ret = pthread_join( p_priv->thread_id, NULL );
 875
 876 #elif defined( HAVE_CTHREADS_H )
 877     cthread_join( p_priv->thread_id );
 878     i_ret = 1;
 879
 880 #endif
 881
 882     if( i_ret )
 883     {
 884         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%s)",
 885                          (unsigned int)p_priv->thread_id, psz_file, i_line,
 886                          strerror(i_ret) );
 887     }
 888     else
 889     {
 890         msg_Dbg( p_this, "thread %u joined (%s:%d)",
 891                          (unsigned int)p_priv->thread_id, psz_file, i_line );
 892     }
 893
 894 #endif
 895
 896     p_priv->b_thread = VLC_FALSE;
 897 }
 898