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( ST_INIT_IN_ST_H )
  48 #elif defined( UNDER_CE )
  49 #elif defined( WIN32 )
  50
  51 /* following is only available on NT/2000/XP and above */
  52 static SIGNALOBJECTANDWAIT pf_SignalObjectAndWait = NULL;
  53
  54 /*
  55 ** On Windows NT/2K/XP we use a slow mutex implementation but which
  56 ** allows us to correctly implement condition variables.
  57 ** You can also use the faster Win9x implementation but you might
  58 ** experience problems with it.
  59 */
  60 static vlc_bool_t          b_fast_mutex = VLC_FALSE;
  61 /*
  62 ** On Windows 9x/Me you can use a fast but incorrect condition variables
  63 ** implementation (more precisely there is a possibility for a race
  64 ** condition to happen).
  65 ** However it is possible to use slower alternatives which are more robust.
  66 ** Currently you can choose between implementation 0 (which is the
  67 ** fastest but slightly incorrect), 1 (default) and 2.
  68 */
  69 static int i_win9x_cv = 1;
  70
  71 #elif defined( HAVE_KERNEL_SCHEDULER_H )
  72 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
  73 static pthread_mutex_t once_mutex = PTHREAD_MUTEX_INITIALIZER;
  74 #elif defined( HAVE_CTHREADS_H )
  75 #endif
  76
  77 vlc_threadvar_t msg_context_global_key;
  78
  79 #ifndef NDEBUG
  80 /*****************************************************************************
  81  * vlc_threads_error: Report an error from the threading mecanism
  82  *****************************************************************************
  83  * This is especially useful to debug those errors, as this is a nice symbol
  84  * on which you can break.
  85  *****************************************************************************/
  86 void vlc_threads_error( vlc_object_t *p_this )
  87 {
  88      msg_Err( p_this, "Error detected. Put a breakpoint in '%s' to debug.",
  89             __func__ );
  90 }
  91 #endif
  92
  93 /*****************************************************************************
  94  * vlc_threads_init: initialize threads system
  95  *****************************************************************************
  96  * This function requires lazy initialization of a global lock in order to
  97  * keep the library really thread-safe. Some architectures don't support this
  98  * and thus do not guarantee the complete reentrancy.
  99  *****************************************************************************/
 100 int __vlc_threads_init( vlc_object_t *p_this )
 101 {
 102     libvlc_global_data_t *p_libvlc_global = (libvlc_global_data_t *)p_this;
 103     int i_ret = VLC_SUCCESS;
 104
 105     /* If we have lazy mutex initialization, use it. Otherwise, we just
 106      * hope nothing wrong happens. */
 107 #if defined( ST_INIT_IN_ST_H )
 108 #elif defined( UNDER_CE )
 109 #elif defined( WIN32 )
 110     if( IsDebuggerPresent() )
 111     {
 112         /* SignalObjectAndWait() is problematic under a debugger */
 113         b_fast_mutex = VLC_TRUE;
 114         i_win9x_cv = 1;
 115     }
 116 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 117 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 118     pthread_mutex_lock( &once_mutex );
 119 #elif defined( HAVE_CTHREADS_H )
 120 #endif
 121
 122     if( i_status == VLC_THREADS_UNINITIALIZED )
 123     {
 124         i_status = VLC_THREADS_PENDING;
 125
 126         /* We should be safe now. Do all the initialization stuff we want. */
 127         p_libvlc_global->b_ready = VLC_FALSE;
 128
 129 #if defined( ST_INIT_IN_ST_H )
 130         i_ret = st_init();
 131
 132 #elif defined( UNDER_CE )
 133         /* Nothing to initialize */
 134
 135 #elif defined( WIN32 )
 136         /* Dynamically get the address of SignalObjectAndWait */
 137         if( GetVersion() < 0x80000000 )
 138         {
 139             HINSTANCE hInstLib;
 140
 141             /* We are running on NT/2K/XP, we can use SignalObjectAndWait */
 142             hInstLib = LoadLibrary( "kernel32" );
 143             if( hInstLib )
 144             {
 145                 pf_SignalObjectAndWait =
 146                     (SIGNALOBJECTANDWAIT)GetProcAddress( hInstLib,
 147                                                      "SignalObjectAndWait" );
 148             }
 149         }
 150
 151 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 152 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 153 #elif defined( HAVE_CTHREADS_H )
 154 #endif
 155
 156         p_root = vlc_object_create( p_libvlc_global, VLC_OBJECT_GLOBAL );
 157         if( p_root == NULL )
 158             i_ret = VLC_ENOMEM;
 159
 160         if( i_ret )
 161         {
 162             i_status = VLC_THREADS_ERROR;
 163         }
 164         else
 165         {
 166             i_initializations++;
 167             i_status = VLC_THREADS_READY;
 168         }
 169
 170         vlc_threadvar_create( p_root, &msg_context_global_key );
 171     }
 172     else
 173     {
 174         /* Just increment the initialization count */
 175         i_initializations++;
 176     }
 177
 178     /* If we have lazy mutex initialization support, unlock the mutex;
 179      * otherwize, do a naive wait loop. */
 180 #if defined( ST_INIT_IN_ST_H )
 181     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 182 #elif defined( UNDER_CE )
 183     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 184 #elif defined( WIN32 )
 185     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 186 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 187     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 188 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 189     pthread_mutex_unlock( &once_mutex );
 190 #elif defined( HAVE_CTHREADS_H )
 191     while( i_status == VLC_THREADS_PENDING ) msleep( THREAD_SLEEP );
 192 #endif
 193
 194     if( i_status != VLC_THREADS_READY )
 195     {
 196         return VLC_ETHREAD;
 197     }
 198
 199     return i_ret;
 200 }
 201
 202 /*****************************************************************************
 203  * vlc_threads_end: stop threads system
 204  *****************************************************************************
 205  * FIXME: This function is far from being threadsafe.
 206  *****************************************************************************/
 207 int __vlc_threads_end( vlc_object_t *p_this )
 208 {
 209     (void)p_this;
 210 #if defined( ST_INIT_IN_ST_H )
 211 #elif defined( UNDER_CE )
 212 #elif defined( WIN32 )
 213 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 214 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 215     pthread_mutex_lock( &once_mutex );
 216 #elif defined( HAVE_CTHREADS_H )
 217 #endif
 218
 219     if( i_initializations == 0 )
 220         return VLC_EGENERIC;
 221
 222     i_initializations--;
 223     if( i_initializations == 0 )
 224     {
 225         i_status = VLC_THREADS_UNINITIALIZED;
 226         vlc_object_destroy( p_root );
 227     }
 228
 229 #if 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( 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)
 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 #   if defined(SYS_LINUX)
 304         pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 305 #   else
 306         pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
 307 #   endif
 308
 309         i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 310         pthread_mutexattr_destroy( &attr );
 311         return( i_result );
 312     }
 313 # endif
 314     return pthread_mutex_init( &p_mutex->mutex, NULL );
 315
 316 #elif defined( HAVE_CTHREADS_H )
 317     mutex_init( p_mutex );
 318     return 0;
 319
 320 #endif
 321 }
 322
 323 /*****************************************************************************
 324  * vlc_mutex_init: initialize a recursive mutex (Do not use)
 325  *****************************************************************************/
 326 int __vlc_mutex_init_recursive( vlc_object_t *p_this, vlc_mutex_t *p_mutex )
 327 {
 328 #if defined( WIN32 )
 329     /* Create mutex returns a recursive mutex */
 330     p_mutex->mutex = CreateMutex( 0, FALSE, 0 );
 331     return ( p_mutex->mutex != NULL ? 0 : 1 );
 332 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 333     pthread_mutexattr_t attr;
 334     int                 i_result;
 335
 336     pthread_mutexattr_init( &attr );
 337 # if defined(DEBUG)
 338     /* Create error-checking mutex to detect problems more easily. */
 339 #   if defined(SYS_LINUX)
 340     pthread_mutexattr_setkind_np( &attr, PTHREAD_MUTEX_ERRORCHECK_NP );
 341 #   else
 342     pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_ERRORCHECK );
 343 #   endif
 344 # endif
 345     pthread_mutexattr_settype( &attr, PTHREAD_MUTEX_RECURSIVE );
 346     i_result = pthread_mutex_init( &p_mutex->mutex, &attr );
 347     pthread_mutexattr_destroy( &attr );
 348     return( i_result );
 349 #else
 350     msg_Err(p_this, "no recursive mutex found. Falling back to regular mutex.\n"
 351                     "Expect hangs\n")
 352     return __vlc_mutex_init( p_this, p_mutex );
 353 #endif
 354 }
 355
 356
 357 /*****************************************************************************
 358  * vlc_mutex_destroy: destroy a mutex, inner version
 359  *****************************************************************************/
 360 int __vlc_mutex_destroy( const char * psz_file, int i_line, vlc_mutex_t *p_mutex )
 361 {
 362     int i_result;
 363     /* In case of error : */
 364     int i_thread = -1;
 365
 366 #if defined( ST_INIT_IN_ST_H )
 367     i_result = st_mutex_destroy( p_mutex->mutex );
 368
 369 #elif defined( UNDER_CE )
 370     DeleteCriticalSection( &p_mutex->csection );
 371     return 0;
 372
 373 #elif defined( WIN32 )
 374     if( p_mutex->mutex )
 375     {
 376         CloseHandle( p_mutex->mutex );
 377     }
 378     else
 379     {
 380         DeleteCriticalSection( &p_mutex->csection );
 381     }
 382     return 0;
 383
 384 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 385     if( p_mutex->init == 9999 )
 386     {
 387         delete_sem( p_mutex->lock );
 388     }
 389
 390     p_mutex->init = 0;
 391     return B_OK;
 392
 393 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 394     i_result = pthread_mutex_destroy( &p_mutex->mutex );
 395     if( i_result )
 396     {
 397         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 398         errno = i_result;
 399     }
 400
 401 #elif defined( HAVE_CTHREADS_H )
 402     return 0;
 403
 404 #endif
 405
 406     if( i_result )
 407     {
 408         msg_Err( p_mutex->p_this,
 409                  "thread %d: mutex_destroy failed at %s:%d (%d:%m)",
 410                  i_thread, psz_file, i_line, i_result );
 411         vlc_threads_error( p_mutex->p_this );
 412     }
 413     return i_result;
 414 }
 415
 416 /*****************************************************************************
 417  * vlc_cond_init: initialize a condition
 418  *****************************************************************************/
 419 int __vlc_cond_init( vlc_object_t *p_this, vlc_cond_t *p_condvar )
 420 {
 421     p_condvar->p_this = p_this;
 422
 423 #if defined( ST_INIT_IN_ST_H )
 424     p_condvar->cond = st_cond_new();
 425     return ( p_condvar->cond == NULL ) ? errno : 0;
 426
 427 #elif defined( UNDER_CE )
 428     /* Initialize counter */
 429     p_condvar->i_waiting_threads = 0;
 430
 431     /* Create an auto-reset event. */
 432     p_condvar->event = CreateEvent( NULL,   /* no security */
 433                                     FALSE,  /* auto-reset event */
 434                                     FALSE,  /* start non-signaled */
 435                                     NULL ); /* unnamed */
 436     return !p_condvar->event;
 437
 438 #elif defined( WIN32 )
 439     /* Initialize counter */
 440     p_condvar->i_waiting_threads = 0;
 441
 442     /* Misc init */
 443     p_condvar->i_win9x_cv = i_win9x_cv;
 444     p_condvar->SignalObjectAndWait = pf_SignalObjectAndWait;
 445
 446     if( (p_condvar->SignalObjectAndWait && !b_fast_mutex)
 447         || p_condvar->i_win9x_cv == 0 )
 448     {
 449         /* Create an auto-reset event. */
 450         p_condvar->event = CreateEvent( NULL,   /* no security */
 451                                         FALSE,  /* auto-reset event */
 452                                         FALSE,  /* start non-signaled */
 453                                         NULL ); /* unnamed */
 454
 455         p_condvar->semaphore = NULL;
 456         return !p_condvar->event;
 457     }
 458     else
 459     {
 460         p_condvar->semaphore = CreateSemaphore( NULL,       /* no security */
 461                                                 0,          /* initial count */
 462                                                 0x7fffffff, /* max count */
 463                                                 NULL );     /* unnamed */
 464
 465         if( p_condvar->i_win9x_cv == 1 )
 466             /* Create a manual-reset event initially signaled. */
 467             p_condvar->event = CreateEvent( NULL, TRUE, TRUE, NULL );
 468         else
 469             /* Create a auto-reset event. */
 470             p_condvar->event = CreateEvent( NULL, FALSE, FALSE, NULL );
 471
 472         InitializeCriticalSection( &p_condvar->csection );
 473
 474         return !p_condvar->semaphore || !p_condvar->event;
 475     }
 476
 477 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 478     if( !p_condvar )
 479     {
 480         return B_BAD_VALUE;
 481     }
 482
 483     if( p_condvar->init == 9999 )
 484     {
 485         return EALREADY;
 486     }
 487
 488     p_condvar->thread = -1;
 489     p_condvar->init = 9999;
 490     return 0;
 491
 492 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 493     pthread_condattr_t attr;
 494     int ret;
 495
 496     ret = pthread_condattr_init (&attr);
 497     if (ret)
 498         return ret;
 499
 500 # if !defined (_POSIX_CLOCK_SELECTION)
 501    /* Fairly outdated POSIX support (that was defined in 2001) */
 502 #  define _POSIX_CLOCK_SELECTION (-1)
 503 # endif
 504 # if (_POSIX_CLOCK_SELECTION >= 0)
 505     /* NOTE: This must be the same clock as the one in mtime.c */
 506     pthread_condattr_setclock (&attr, CLOCK_MONOTONIC);
 507 # endif
 508
 509     ret = pthread_cond_init (&p_condvar->cond, &attr);
 510     pthread_condattr_destroy (&attr);
 511     return ret;
 512
 513 #elif defined( HAVE_CTHREADS_H )
 514     /* condition_init() */
 515     spin_lock_init( &p_condvar->lock );
 516     cthread_queue_init( &p_condvar->queue );
 517     p_condvar->name = 0;
 518     p_condvar->implications = 0;
 519
 520     return 0;
 521
 522 #endif
 523 }
 524
 525 /*****************************************************************************
 526  * vlc_cond_destroy: destroy a condition, inner version
 527  *****************************************************************************/
 528 int __vlc_cond_destroy( const char * psz_file, int i_line, vlc_cond_t *p_condvar )
 529 {
 530     int i_result;
 531     /* In case of error : */
 532     int i_thread = -1;
 533
 534 #if defined( ST_INIT_IN_ST_H )
 535     i_result = st_cond_destroy( p_condvar->cond );
 536
 537 #elif defined( UNDER_CE )
 538     i_result = !CloseHandle( p_condvar->event );
 539
 540 #elif defined( WIN32 )
 541     if( !p_condvar->semaphore )
 542         i_result = !CloseHandle( p_condvar->event );
 543     else
 544         i_result = !CloseHandle( p_condvar->event )
 545           || !CloseHandle( p_condvar->semaphore );
 546
 547     if( p_condvar->semaphore != NULL )
 548         DeleteCriticalSection( &p_condvar->csection );
 549
 550 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 551     p_condvar->init = 0;
 552     return 0;
 553
 554 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 555     i_result = pthread_cond_destroy( &p_condvar->cond );
 556     if( i_result )
 557     {
 558         i_thread = CAST_PTHREAD_TO_INT(pthread_self());
 559         errno = i_result;
 560     }
 561
 562 #elif defined( HAVE_CTHREADS_H )
 563     return 0;
 564
 565 #endif
 566
 567     if( i_result )
 568     {
 569         msg_Err( p_condvar->p_this,
 570                  "thread %d: cond_destroy failed at %s:%d (%d:%m)",
 571                  i_thread, psz_file, i_line, i_result );
 572         vlc_threads_error( p_condvar->p_this );
 573     }
 574     return i_result;
 575 }
 576
 577 /*****************************************************************************
 578  * vlc_tls_create: create a thread-local variable
 579  *****************************************************************************/
 580 int __vlc_threadvar_create( vlc_object_t *p_this, vlc_threadvar_t *p_tls )
 581 {
 582     int i_ret = -1;
 583     (void)p_this;
 584
 585 #if defined( HAVE_KERNEL_SCHEDULER_H )
 586     msg_Err( p_this, "TLS not implemented" );
 587     i_ret VLC_EGENERIC;
 588 #elif defined( ST_INIT_IN_ST_H )
 589     i_ret = st_key_create( &p_tls->handle, NULL );
 590 #elif defined( UNDER_CE ) || defined( WIN32 )
 591 #elif defined( WIN32 )
 592     p_tls->handle = TlsAlloc();
 593     i_ret = !( p_tls->handle == 0xFFFFFFFF );
 594
 595 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 596     i_ret =  pthread_key_create( &p_tls->handle, NULL );
 597 #elif defined( HAVE_CTHREADS_H )
 598     i_ret = cthread_keycreate( &p_tls-handle );
 599 #endif
 600     return i_ret;
 601 }
 602
 603 /*****************************************************************************
 604  * vlc_thread_create: create a thread, inner version
 605  *****************************************************************************
 606  * Note that i_priority is only taken into account on platforms supporting
 607  * userland real-time priority threads.
 608  *****************************************************************************/
 609 int __vlc_thread_create( vlc_object_t *p_this, const char * psz_file, int i_line,
 610                          const char *psz_name, void * ( *func ) ( void * ),
 611                          int i_priority, vlc_bool_t b_wait )
 612 {
 613     int i_ret;
 614     void *p_data = (void *)p_this;
 615     vlc_object_internals_t *p_priv = p_this->p_internals;
 616
 617     vlc_mutex_lock( &p_this->object_lock );
 618
 619 #if defined( ST_INIT_IN_ST_H )
 620     p_priv->thread_id = st_thread_create( func, p_data, 1, 0 );
 621     i_ret = 0;
 622
 623 #elif defined( WIN32 ) || defined( UNDER_CE )
 624     {
 625         /* When using the MSVCRT C library you have to use the _beginthreadex
 626          * function instead of CreateThread, otherwise you'll end up with
 627          * memory leaks and the signal functions not working (see Microsoft
 628          * Knowledge Base, article 104641) */
 629 #if defined( UNDER_CE )
 630         DWORD  threadId;
 631         HANDLE hThread = CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE)func,
 632                                       (LPVOID)p_data, CREATE_SUSPENDED,
 633                       &threadId );
 634 #else
 635         unsigned threadId;
 636         uintptr_t hThread = _beginthreadex( NULL, 0,
 637                         (LPTHREAD_START_ROUTINE)func,
 638                                             (void*)p_data, CREATE_SUSPENDED,
 639                         &threadId );
 640 #endif
 641         p_priv->thread_id.id = (DWORD)threadId;
 642         p_priv->thread_id.hThread = (HANDLE)hThread;
 643     ResumeThread((HANDLE)hThread);
 644     }
 645
 646     i_ret = ( p_priv->thread_id.hThread ? 0 : 1 );
 647
 648     if( i_ret && i_priority )
 649     {
 650         if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
 651         {
 652             msg_Warn( p_this, "couldn't set a faster priority" );
 653             i_priority = 0;
 654         }
 655     }
 656
 657 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 658     p_priv->thread_id = spawn_thread( (thread_func)func, psz_name,
 659                                       i_priority, p_data );
 660     i_ret = resume_thread( p_priv->thread_id );
 661
 662 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 663     i_ret = pthread_create( &p_priv->thread_id, NULL, func, p_data );
 664
 665 #ifndef __APPLE__
 666     if( config_GetInt( p_this, "rt-priority" ) )
 667 #endif
 668     {
 669         int i_error, i_policy;
 670         struct sched_param param;
 671
 672         memset( &param, 0, sizeof(struct sched_param) );
 673         if( config_GetType( p_this, "rt-offset" ) )
 674         {
 675             i_priority += config_GetInt( p_this, "rt-offset" );
 676         }
 677         if( i_priority <= 0 )
 678         {
 679             param.sched_priority = (-1) * i_priority;
 680             i_policy = SCHED_OTHER;
 681         }
 682         else
 683         {
 684             param.sched_priority = i_priority;
 685             i_policy = SCHED_RR;
 686         }
 687         if( (i_error = pthread_setschedparam( p_priv->thread_id,
 688                                                i_policy, &param )) )
 689         {
 690             errno = i_error;
 691             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %m",
 692                       psz_file, i_line );
 693             i_priority = 0;
 694         }
 695     }
 696 #ifndef __APPLE__
 697     else
 698     {
 699         i_priority = 0;
 700     }
 701 #endif
 702
 703 #elif defined( HAVE_CTHREADS_H )
 704     p_priv->thread_id = cthread_fork( (cthread_fn_t)func, (any_t)p_data );
 705     i_ret = 0;
 706
 707 #endif
 708
 709     if( i_ret == 0 )
 710     {
 711         if( b_wait )
 712         {
 713             msg_Dbg( p_this, "waiting for thread completion" );
 714             vlc_object_wait( p_this );
 715         }
 716
 717         p_priv->b_thread = VLC_TRUE;
 718
 719 #if defined( WIN32 ) || defined( UNDER_CE )
 720         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 721                  (unsigned int)p_priv->thread_id.id, psz_name,
 722          i_priority, psz_file, i_line );
 723 #else
 724         msg_Dbg( p_this, "thread %u (%s) created at priority %d (%s:%d)",
 725                  (unsigned int)p_priv->thread_id, psz_name, i_priority,
 726                  psz_file, i_line );
 727 #endif
 728
 729
 730         vlc_mutex_unlock( &p_this->object_lock );
 731     }
 732     else
 733     {
 734         errno = i_ret;
 735         msg_Err( p_this, "%s thread could not be created at %s:%d (%m)",
 736                          psz_name, psz_file, i_line );
 737         vlc_threads_error( p_this );
 738         vlc_mutex_unlock( &p_this->object_lock );
 739     }
 740
 741     return i_ret;
 742 }
 743
 744 /*****************************************************************************
 745  * vlc_thread_set_priority: set the priority of the current thread when we
 746  * couldn't set it in vlc_thread_create (for instance for the main thread)
 747  *****************************************************************************/
 748 int __vlc_thread_set_priority( vlc_object_t *p_this, const char * psz_file,
 749                                int i_line, int i_priority )
 750 {
 751     vlc_object_internals_t *p_priv = p_this->p_internals;
 752 #if defined( ST_INIT_IN_ST_H )
 753 #elif defined( WIN32 ) || defined( UNDER_CE )
 754     if( !p_priv->thread_id.hThread )
 755         p_priv->thread_id.hThread = GetCurrentThread();
 756     if( !SetThreadPriority(p_priv->thread_id.hThread, i_priority) )
 757     {
 758         msg_Warn( p_this, "couldn't set a faster priority" );
 759         return 1;
 760     }
 761
 762 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 763 # ifndef __APPLE__
 764     if( config_GetInt( p_this, "rt-priority" ) > 0 )
 765 # endif
 766     {
 767         int i_error, i_policy;
 768         struct sched_param param;
 769
 770         memset( &param, 0, sizeof(struct sched_param) );
 771         if( config_GetType( p_this, "rt-offset" ) )
 772         {
 773             i_priority += config_GetInt( p_this, "rt-offset" );
 774         }
 775         if( i_priority <= 0 )
 776         {
 777             param.sched_priority = (-1) * i_priority;
 778             i_policy = SCHED_OTHER;
 779         }
 780         else
 781         {
 782             param.sched_priority = i_priority;
 783             i_policy = SCHED_RR;
 784         }
 785         if( !p_priv->thread_id )
 786             p_priv->thread_id = pthread_self();
 787         if( (i_error = pthread_setschedparam( p_priv->thread_id,
 788                                                i_policy, &param )) )
 789         {
 790             errno = i_error;
 791             msg_Warn( p_this, "couldn't set thread priority (%s:%d): %m",
 792                       psz_file, i_line );
 793             i_priority = 0;
 794         }
 795     }
 796 #endif
 797
 798     return 0;
 799 }
 800
 801 /*****************************************************************************
 802  * vlc_thread_ready: tell the parent thread we were successfully spawned
 803  *****************************************************************************/
 804 void __vlc_thread_ready( vlc_object_t *p_this )
 805 {
 806     vlc_object_signal( p_this );
 807 }
 808
 809 /*****************************************************************************
 810  * vlc_thread_join: wait until a thread exits, inner version
 811  *****************************************************************************/
 812 void __vlc_thread_join( vlc_object_t *p_this, const char * psz_file, int i_line )
 813 {
 814     vlc_object_internals_t *p_priv = p_this->p_internals;
 815
 816 #if defined( UNDER_CE ) || defined( WIN32 )
 817     HMODULE hmodule;
 818     BOOL (WINAPI *OurGetThreadTimes)( HANDLE, FILETIME*, FILETIME*,
 819                                       FILETIME*, FILETIME* );
 820     FILETIME create_ft, exit_ft, kernel_ft, user_ft;
 821     int64_t real_time, kernel_time, user_time;
 822     HANDLE hThread;
 823
 824     /*
 825     ** object will close its thread handle when destroyed, duplicate it here
 826     ** to be on the safe side
 827     */
 828     if( ! DuplicateHandle(GetCurrentProcess(),
 829             p_priv->thread_id.hThread,
 830             GetCurrentProcess(),
 831             &hThread,
 832             0,
 833             FALSE,
 834             DUPLICATE_SAME_ACCESS) )
 835     {
 836         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%s)",
 837                          (unsigned int)p_priv->thread_id.id,
 838              psz_file, i_line, GetLastError() );
 839         vlc_threads_error( p_this );
 840         p_priv->b_thread = VLC_FALSE;
 841         return;
 842     }
 843
 844     WaitForSingleObject( hThread, INFINITE );
 845
 846     msg_Dbg( p_this, "thread %u joined (%s:%d)",
 847              (unsigned int)p_priv->thread_id.id,
 848              psz_file, i_line );
 849 #if defined( UNDER_CE )
 850     hmodule = GetModuleHandle( _T("COREDLL") );
 851 #else
 852     hmodule = GetModuleHandle( _T("KERNEL32") );
 853 #endif
 854     OurGetThreadTimes = (BOOL (WINAPI*)( HANDLE, FILETIME*, FILETIME*,
 855                                          FILETIME*, FILETIME* ))
 856         GetProcAddress( hmodule, _T("GetThreadTimes") );
 857
 858     if( OurGetThreadTimes &&
 859         OurGetThreadTimes( hThread,
 860                            &create_ft, &exit_ft, &kernel_ft, &user_ft ) )
 861     {
 862         real_time =
 863           ((((int64_t)exit_ft.dwHighDateTime)<<32)| exit_ft.dwLowDateTime) -
 864           ((((int64_t)create_ft.dwHighDateTime)<<32)| create_ft.dwLowDateTime);
 865         real_time /= 10;
 866
 867         kernel_time =
 868           ((((int64_t)kernel_ft.dwHighDateTime)<<32)|
 869            kernel_ft.dwLowDateTime) / 10;
 870
 871         user_time =
 872           ((((int64_t)user_ft.dwHighDateTime)<<32)|
 873            user_ft.dwLowDateTime) / 10;
 874
 875         msg_Dbg( p_this, "thread times: "
 876                  "real "I64Fd"m%fs, kernel "I64Fd"m%fs, user "I64Fd"m%fs",
 877                  real_time/60/1000000,
 878                  (double)((real_time%(60*1000000))/1000000.0),
 879                  kernel_time/60/1000000,
 880                  (double)((kernel_time%(60*1000000))/1000000.0),
 881                  user_time/60/1000000,
 882                  (double)((user_time%(60*1000000))/1000000.0) );
 883     }
 884     CloseHandle( hThread );
 885
 886 #else /* !defined(WIN32) */
 887
 888     int i_ret = 0;
 889
 890 #if defined( ST_INIT_IN_ST_H )
 891     i_ret = st_thread_join( p_priv->thread_id, NULL );
 892
 893 #elif defined( HAVE_KERNEL_SCHEDULER_H )
 894     int32_t exit_value;
 895     i_ret = (B_OK == wait_for_thread( p_priv->thread_id, &exit_value ));
 896
 897 #elif defined( PTHREAD_COND_T_IN_PTHREAD_H )
 898     i_ret = pthread_join( p_priv->thread_id, NULL );
 899
 900 #elif defined( HAVE_CTHREADS_H )
 901     cthread_join( p_priv->thread_id );
 902     i_ret = 1;
 903
 904 #endif
 905
 906     if( i_ret )
 907     {
 908         errno = i_ret;
 909         msg_Err( p_this, "thread_join(%u) failed at %s:%d (%m)",
 910                          (unsigned int)p_priv->thread_id, psz_file, i_line );
 911         vlc_threads_error( p_this );
 912     }
 913     else
 914     {
 915         msg_Dbg( p_this, "thread %u joined (%s:%d)",
 916                          (unsigned int)p_priv->thread_id, psz_file, i_line );
 917     }
 918
 919 #endif
 920
 921     p_priv->b_thread = VLC_FALSE;
 922 }
 923