| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: thread.cpp |
| 3 | // Purpose: wxThread Implementation |
| 4 | // Author: Original from Wolfram Gloger/Guilhem Lavaux/Vadim Zeitlin |
| 5 | // Modified by: Stefan Csomor |
| 6 | // Created: 04/22/98 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) Wolfram Gloger (1996, 1997); Guilhem Lavaux (1998), |
| 9 | // Vadim Zeitlin (1999) , Stefan Csomor (2000) |
| 10 | // Licence: wxWindows licence |
| 11 | ///////////////////////////////////////////////////////////////////////////// |
| 12 | |
| 13 | #ifdef __GNUG__ |
| 14 | #pragma implementation "thread.h" |
| 15 | #endif |
| 16 | |
| 17 | // ---------------------------------------------------------------------------- |
| 18 | // headers |
| 19 | // ---------------------------------------------------------------------------- |
| 20 | |
| 21 | // For compilers that support precompilation, includes "wx.h". |
| 22 | #include "wx/wxprec.h" |
| 23 | |
| 24 | #if defined(__BORLANDC__) |
| 25 | #pragma hdrstop |
| 26 | #endif |
| 27 | |
| 28 | #ifndef WX_PRECOMP |
| 29 | #include "wx/wx.h" |
| 30 | #endif |
| 31 | |
| 32 | #if wxUSE_THREADS |
| 33 | |
| 34 | #include "wx/module.h" |
| 35 | #include "wx/thread.h" |
| 36 | |
| 37 | // ---------------------------------------------------------------------------- |
| 38 | // constants |
| 39 | // ---------------------------------------------------------------------------- |
| 40 | |
| 41 | // the possible states of the thread ("=>" shows all possible transitions from |
| 42 | // this state) |
| 43 | enum wxThreadState |
| 44 | { |
| 45 | STATE_NEW, // didn't start execution yet (=> RUNNING) |
| 46 | STATE_RUNNING, // thread is running (=> PAUSED, CANCELED) |
| 47 | STATE_PAUSED, // thread is temporarily suspended (=> RUNNING) |
| 48 | STATE_CANCELED, // thread should terminate a.s.a.p. (=> EXITED) |
| 49 | STATE_EXITED // thread is terminating |
| 50 | }; |
| 51 | |
| 52 | // ---------------------------------------------------------------------------- |
| 53 | // this module globals |
| 54 | // ---------------------------------------------------------------------------- |
| 55 | |
| 56 | static ThreadID gs_idMainThread = kNoThreadID ; |
| 57 | static bool gs_waitingForThread = FALSE ; |
| 58 | |
| 59 | // ============================================================================ |
| 60 | // MacOS implementation of thread classes |
| 61 | // ============================================================================ |
| 62 | |
| 63 | class wxMacStCritical |
| 64 | { |
| 65 | public : |
| 66 | wxMacStCritical() |
| 67 | { |
| 68 | ThreadBeginCritical() ; |
| 69 | } |
| 70 | ~wxMacStCritical() |
| 71 | { |
| 72 | ThreadEndCritical() ; |
| 73 | } |
| 74 | } ; |
| 75 | |
| 76 | // ---------------------------------------------------------------------------- |
| 77 | // wxMutex implementation |
| 78 | // ---------------------------------------------------------------------------- |
| 79 | |
| 80 | class wxMutexInternal |
| 81 | { |
| 82 | public: |
| 83 | wxMutexInternal() |
| 84 | { |
| 85 | m_owner = kNoThreadID ; |
| 86 | } |
| 87 | |
| 88 | ~wxMutexInternal() |
| 89 | { |
| 90 | } |
| 91 | |
| 92 | public: |
| 93 | ThreadID m_owner ; |
| 94 | wxArrayLong m_waiters ; |
| 95 | }; |
| 96 | |
| 97 | wxMutex::wxMutex() |
| 98 | { |
| 99 | m_internal = new wxMutexInternal; |
| 100 | |
| 101 | m_locked = 0; |
| 102 | } |
| 103 | |
| 104 | wxMutex::~wxMutex() |
| 105 | { |
| 106 | if ( m_locked > 0 ) |
| 107 | { |
| 108 | wxLogDebug(_T("Warning: freeing a locked mutex (%d locks)."), m_locked); |
| 109 | } |
| 110 | |
| 111 | delete m_internal; |
| 112 | } |
| 113 | |
| 114 | wxMutexError wxMutex::Lock() |
| 115 | { |
| 116 | wxMacStCritical critical ; |
| 117 | |
| 118 | OSErr err ; |
| 119 | ThreadID current = kNoThreadID; |
| 120 | err = ::MacGetCurrentThread(¤t); |
| 121 | // if we are not the owner, add this thread to the list of waiting threads, stop this thread |
| 122 | // and invoke the scheduler to continue executing the owner's thread |
| 123 | while ( m_internal->m_owner != kNoThreadID && m_internal->m_owner != current) |
| 124 | { |
| 125 | m_internal->m_waiters.Add(current); |
| 126 | err = ::SetThreadStateEndCritical(kCurrentThreadID, kStoppedThreadState, m_internal->m_owner); |
| 127 | err = ::ThreadBeginCritical(); |
| 128 | } |
| 129 | m_internal->m_owner = current; |
| 130 | m_locked++; |
| 131 | |
| 132 | return wxMUTEX_NO_ERROR; |
| 133 | } |
| 134 | |
| 135 | wxMutexError wxMutex::TryLock() |
| 136 | { |
| 137 | wxMacStCritical critical ; |
| 138 | |
| 139 | OSErr err ; |
| 140 | ThreadID current = kNoThreadID; |
| 141 | ::MacGetCurrentThread(¤t); |
| 142 | // if we are not the owner, give an error back |
| 143 | if ( m_internal->m_owner != kNoThreadID && m_internal->m_owner != current ) |
| 144 | return wxMUTEX_BUSY; |
| 145 | |
| 146 | m_internal->m_owner = current; |
| 147 | m_locked++; |
| 148 | |
| 149 | return wxMUTEX_NO_ERROR; |
| 150 | } |
| 151 | |
| 152 | wxMutexError wxMutex::Unlock() |
| 153 | { |
| 154 | OSErr err; |
| 155 | err = ::ThreadBeginCritical(); |
| 156 | |
| 157 | if (m_locked > 0) |
| 158 | m_locked--; |
| 159 | |
| 160 | // this mutex is not owned by anybody anmore |
| 161 | m_internal->m_owner = kNoThreadID; |
| 162 | |
| 163 | // now pass on to the first waiting thread |
| 164 | ThreadID firstWaiting = kNoThreadID; |
| 165 | bool found = false; |
| 166 | while (!m_internal->m_waiters.IsEmpty() && !found) |
| 167 | { |
| 168 | firstWaiting = m_internal->m_waiters[0]; |
| 169 | err = ::SetThreadState(firstWaiting, kReadyThreadState, kNoThreadID); |
| 170 | // in case this was not successful (dead thread), we just loop on and reset the id |
| 171 | found = (err != threadNotFoundErr); |
| 172 | if ( !found ) |
| 173 | firstWaiting = kNoThreadID ; |
| 174 | m_internal->m_waiters.RemoveAt(0) ; |
| 175 | } |
| 176 | // now we have a valid firstWaiting thread, which has been scheduled to run next, just end the |
| 177 | // critical section and invoke the scheduler |
| 178 | err = ::SetThreadStateEndCritical(kCurrentThreadID, kReadyThreadState, firstWaiting); |
| 179 | |
| 180 | return wxMUTEX_NO_ERROR; |
| 181 | } |
| 182 | |
| 183 | // ---------------------------------------------------------------------------- |
| 184 | // wxCondition implementation |
| 185 | // ---------------------------------------------------------------------------- |
| 186 | |
| 187 | class wxConditionInternal |
| 188 | { |
| 189 | public: |
| 190 | wxConditionInternal() |
| 191 | { |
| 192 | m_excessSignals = 0 ; |
| 193 | } |
| 194 | ~wxConditionInternal() |
| 195 | { |
| 196 | } |
| 197 | |
| 198 | bool Wait(unsigned long msectimeout) |
| 199 | { |
| 200 | wxMacStCritical critical ; |
| 201 | if ( m_excessSignals > 0 ) |
| 202 | { |
| 203 | --m_excessSignals ; |
| 204 | return TRUE ; |
| 205 | } |
| 206 | else if ( msectimeout == 0 ) |
| 207 | { |
| 208 | return FALSE ; |
| 209 | } |
| 210 | else |
| 211 | { |
| 212 | } |
| 213 | /* |
| 214 | waiters++; |
| 215 | |
| 216 | // FIXME this should be MsgWaitForMultipleObjects() as well probably |
| 217 | DWORD rc = ::WaitForSingleObject(event, timeout); |
| 218 | |
| 219 | waiters--; |
| 220 | |
| 221 | return rc != WAIT_TIMEOUT; |
| 222 | */ |
| 223 | return TRUE ; |
| 224 | } |
| 225 | void Signal() |
| 226 | { |
| 227 | wxMacStCritical critical ; |
| 228 | } |
| 229 | |
| 230 | wxArrayLong m_waiters ; |
| 231 | wxInt32 m_excessSignals ; |
| 232 | }; |
| 233 | |
| 234 | wxCondition::wxCondition() |
| 235 | { |
| 236 | m_internal = new wxConditionInternal; |
| 237 | } |
| 238 | |
| 239 | wxCondition::~wxCondition() |
| 240 | { |
| 241 | delete m_internal; |
| 242 | } |
| 243 | |
| 244 | void wxCondition::Wait() |
| 245 | { |
| 246 | (void)m_internal->Wait(0xFFFFFFFFL ); |
| 247 | } |
| 248 | |
| 249 | bool wxCondition::Wait(unsigned long sec, |
| 250 | unsigned long nsec) |
| 251 | { |
| 252 | return m_internal->Wait(sec*1000 + nsec/1000000); |
| 253 | } |
| 254 | |
| 255 | void wxCondition::Signal() |
| 256 | { |
| 257 | // set the event to signaled: if a thread is already waiting on it, it will |
| 258 | // be woken up, otherwise the event will remain in the signaled state until |
| 259 | // someone waits on it. In any case, the system will return it to a non |
| 260 | // signalled state afterwards. If multiple threads are waiting, only one |
| 261 | // will be woken up. |
| 262 | m_internal->Signal() ; |
| 263 | } |
| 264 | |
| 265 | void wxCondition::Broadcast() |
| 266 | { |
| 267 | // this works because all these threads are already waiting and so each |
| 268 | // SetEvent() inside Signal() is really a PulseEvent() because the event |
| 269 | // state is immediately returned to non-signaled |
| 270 | for ( int i = 0; i < m_internal->m_waiters.Count(); i++ ) |
| 271 | { |
| 272 | Signal(); |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | // ---------------------------------------------------------------------------- |
| 277 | // wxCriticalSection implementation |
| 278 | // ---------------------------------------------------------------------------- |
| 279 | |
| 280 | // it's implemented as a mutex on mac os, so it is defined in the headers |
| 281 | |
| 282 | // ---------------------------------------------------------------------------- |
| 283 | // wxThread implementation |
| 284 | // ---------------------------------------------------------------------------- |
| 285 | |
| 286 | // wxThreadInternal class |
| 287 | // ---------------------- |
| 288 | |
| 289 | class wxThreadInternal |
| 290 | { |
| 291 | public: |
| 292 | wxThreadInternal() |
| 293 | { |
| 294 | m_tid = kNoThreadID ; |
| 295 | m_state = STATE_NEW; |
| 296 | m_priority = WXTHREAD_DEFAULT_PRIORITY; |
| 297 | } |
| 298 | |
| 299 | ~wxThreadInternal() |
| 300 | { |
| 301 | } |
| 302 | |
| 303 | void Free() |
| 304 | { |
| 305 | } |
| 306 | |
| 307 | // create a new (suspended) thread (for the given thread object) |
| 308 | bool Create(wxThread *thread); |
| 309 | |
| 310 | // suspend/resume/terminate |
| 311 | bool Suspend(); |
| 312 | bool Resume(); |
| 313 | void Cancel() { m_state = STATE_CANCELED; } |
| 314 | |
| 315 | // thread state |
| 316 | void SetState(wxThreadState state) { m_state = state; } |
| 317 | wxThreadState GetState() const { return m_state; } |
| 318 | |
| 319 | // thread priority |
| 320 | void SetPriority(unsigned int priority); |
| 321 | unsigned int GetPriority() const { return m_priority; } |
| 322 | |
| 323 | void SetResult( void *res ) { m_result = res ; } |
| 324 | void *GetResult() { return m_result ; } |
| 325 | |
| 326 | // thread handle and id |
| 327 | ThreadID GetId() const { return m_tid; } |
| 328 | |
| 329 | // thread function |
| 330 | static pascal void* MacThreadStart(wxThread* arg); |
| 331 | |
| 332 | private: |
| 333 | wxThreadState m_state; // state, see wxThreadState enum |
| 334 | unsigned int m_priority; // thread priority in "wx" units |
| 335 | ThreadID m_tid; // thread id |
| 336 | void * m_result ; |
| 337 | static ThreadEntryUPP s_threadEntry ; |
| 338 | public : |
| 339 | }; |
| 340 | |
| 341 | static wxArrayPtrVoid s_threads ; |
| 342 | |
| 343 | ThreadEntryUPP wxThreadInternal::s_threadEntry = NULL ; |
| 344 | pascal void* wxThreadInternal::MacThreadStart(wxThread *thread) |
| 345 | { |
| 346 | // first of all, check whether we hadn't been cancelled already |
| 347 | if ( thread->m_internal->GetState() == STATE_EXITED ) |
| 348 | { |
| 349 | return (void*)-1; |
| 350 | } |
| 351 | |
| 352 | void* rc = thread->Entry(); |
| 353 | |
| 354 | // enter m_critsect before changing the thread state |
| 355 | thread->m_critsect.Enter(); |
| 356 | bool wasCancelled = thread->m_internal->GetState() == STATE_CANCELED; |
| 357 | thread->m_internal->SetState(STATE_EXITED); |
| 358 | thread->m_critsect.Leave(); |
| 359 | |
| 360 | thread->OnExit(); |
| 361 | |
| 362 | // if the thread was cancelled (from Delete()), then it the handle is still |
| 363 | // needed there |
| 364 | if ( thread->IsDetached() && !wasCancelled ) |
| 365 | { |
| 366 | // auto delete |
| 367 | delete thread; |
| 368 | } |
| 369 | //else: the joinable threads handle will be closed when Wait() is done |
| 370 | |
| 371 | return rc; |
| 372 | } |
| 373 | void wxThreadInternal::SetPriority(unsigned int priority) |
| 374 | { |
| 375 | // Priorities don't exist on Mac |
| 376 | } |
| 377 | |
| 378 | bool wxThreadInternal::Create(wxThread *thread) |
| 379 | { |
| 380 | if ( s_threadEntry == NULL ) |
| 381 | { |
| 382 | s_threadEntry = NewThreadEntryUPP( (ThreadEntryProcPtr) MacThreadStart ) ; |
| 383 | } |
| 384 | OSErr err = NewThread(kCooperativeThread, |
| 385 | s_threadEntry, |
| 386 | (void*) thread , |
| 387 | 0 , |
| 388 | kNewSuspend , |
| 389 | &m_result , |
| 390 | &m_tid ) ; |
| 391 | |
| 392 | if ( err != noErr ) |
| 393 | { |
| 394 | wxLogSysError(_("Can't create thread")); |
| 395 | return FALSE; |
| 396 | } |
| 397 | |
| 398 | if ( m_priority != WXTHREAD_DEFAULT_PRIORITY ) |
| 399 | { |
| 400 | SetPriority(m_priority); |
| 401 | } |
| 402 | |
| 403 | return TRUE; |
| 404 | } |
| 405 | |
| 406 | bool wxThreadInternal::Suspend() |
| 407 | { |
| 408 | OSErr err ; |
| 409 | |
| 410 | ::ThreadBeginCritical(); |
| 411 | |
| 412 | if ( m_state != STATE_RUNNING ) |
| 413 | { |
| 414 | ::ThreadEndCritical() ; |
| 415 | wxLogSysError(_("Can not suspend thread %x"), m_tid); |
| 416 | return FALSE; |
| 417 | } |
| 418 | |
| 419 | m_state = STATE_PAUSED; |
| 420 | |
| 421 | err = ::SetThreadStateEndCritical(m_tid, kStoppedThreadState, kNoThreadID); |
| 422 | |
| 423 | return TRUE; |
| 424 | } |
| 425 | |
| 426 | bool wxThreadInternal::Resume() |
| 427 | { |
| 428 | ThreadID current ; |
| 429 | OSErr err ; |
| 430 | err = MacGetCurrentThread( ¤t ) ; |
| 431 | |
| 432 | wxASSERT( err == noErr ) ; |
| 433 | wxASSERT( current != m_tid ) ; |
| 434 | |
| 435 | ::ThreadBeginCritical(); |
| 436 | if ( m_state != STATE_PAUSED && m_state != STATE_NEW ) |
| 437 | { |
| 438 | ::ThreadEndCritical() ; |
| 439 | wxLogSysError(_("Can not resume thread %x"), m_tid); |
| 440 | return FALSE; |
| 441 | |
| 442 | } |
| 443 | err = ::SetThreadStateEndCritical(m_tid, kReadyThreadState, kNoThreadID); |
| 444 | wxASSERT( err == noErr ) ; |
| 445 | |
| 446 | m_state = STATE_RUNNING; |
| 447 | ::ThreadEndCritical() ; |
| 448 | ::YieldToAnyThread() ; |
| 449 | return TRUE; |
| 450 | } |
| 451 | |
| 452 | // static functions |
| 453 | // ---------------- |
| 454 | wxThread *wxThread::This() |
| 455 | { |
| 456 | wxMacStCritical critical ; |
| 457 | |
| 458 | ThreadID current ; |
| 459 | OSErr err ; |
| 460 | |
| 461 | err = MacGetCurrentThread( ¤t ) ; |
| 462 | |
| 463 | for ( int i = 0 ; i < s_threads.Count() ; ++i ) |
| 464 | { |
| 465 | if ( ( (wxThread*) s_threads[i] )->GetId() == current ) |
| 466 | return (wxThread*) s_threads[i] ; |
| 467 | } |
| 468 | |
| 469 | wxLogSysError(_("Couldn't get the current thread pointer")); |
| 470 | return NULL; |
| 471 | } |
| 472 | |
| 473 | bool wxThread::IsMain() |
| 474 | { |
| 475 | ThreadID current ; |
| 476 | OSErr err ; |
| 477 | |
| 478 | err = MacGetCurrentThread( ¤t ) ; |
| 479 | return current == gs_idMainThread; |
| 480 | } |
| 481 | |
| 482 | #ifdef Yield |
| 483 | #undef Yield |
| 484 | #endif |
| 485 | |
| 486 | void wxThread::Yield() |
| 487 | { |
| 488 | ::YieldToAnyThread() ; |
| 489 | } |
| 490 | |
| 491 | void wxThread::Sleep(unsigned long milliseconds) |
| 492 | { |
| 493 | clock_t start = clock() ; |
| 494 | do |
| 495 | { |
| 496 | YieldToAnyThread() ; |
| 497 | } while( clock() - start < milliseconds / CLOCKS_PER_SEC ) ; |
| 498 | } |
| 499 | |
| 500 | int wxThread::GetCPUCount() |
| 501 | { |
| 502 | // we will use whatever MP API will be used for the new MP Macs |
| 503 | return 1; |
| 504 | } |
| 505 | |
| 506 | bool wxThread::SetConcurrency(size_t level) |
| 507 | { |
| 508 | wxASSERT_MSG( IsMain(), _T("should only be called from the main thread") ); |
| 509 | |
| 510 | // ok only for the default one |
| 511 | if ( level == 0 ) |
| 512 | return 0; |
| 513 | |
| 514 | // how many CPUs have we got? |
| 515 | if ( GetCPUCount() == 1 ) |
| 516 | { |
| 517 | // don't bother with all this complicated stuff - on a single |
| 518 | // processor system it doesn't make much sense anyhow |
| 519 | return level == 1; |
| 520 | } |
| 521 | |
| 522 | return TRUE ; |
| 523 | } |
| 524 | |
| 525 | // ctor and dtor |
| 526 | // ------------- |
| 527 | |
| 528 | wxThread::wxThread(wxThreadKind kind) |
| 529 | { |
| 530 | m_internal = new wxThreadInternal(); |
| 531 | |
| 532 | m_isDetached = kind == wxTHREAD_DETACHED; |
| 533 | s_threads.Add( (void*) this ) ; |
| 534 | } |
| 535 | |
| 536 | wxThread::~wxThread() |
| 537 | { |
| 538 | s_threads.Remove( (void*) this ) ; |
| 539 | delete m_internal; |
| 540 | } |
| 541 | |
| 542 | // create/start thread |
| 543 | // ------------------- |
| 544 | |
| 545 | wxThreadError wxThread::Create() |
| 546 | { |
| 547 | wxCriticalSectionLocker lock(m_critsect); |
| 548 | |
| 549 | if ( !m_internal->Create(this) ) |
| 550 | return wxTHREAD_NO_RESOURCE; |
| 551 | |
| 552 | return wxTHREAD_NO_ERROR; |
| 553 | } |
| 554 | |
| 555 | wxThreadError wxThread::Run() |
| 556 | { |
| 557 | wxCriticalSectionLocker lock(m_critsect); |
| 558 | |
| 559 | if ( m_internal->GetState() != STATE_NEW ) |
| 560 | { |
| 561 | // actually, it may be almost any state at all, not only STATE_RUNNING |
| 562 | return wxTHREAD_RUNNING; |
| 563 | } |
| 564 | |
| 565 | // the thread has just been created and is still suspended - let it run |
| 566 | return Resume(); |
| 567 | } |
| 568 | |
| 569 | // suspend/resume thread |
| 570 | // --------------------- |
| 571 | |
| 572 | wxThreadError wxThread::Pause() |
| 573 | { |
| 574 | wxCriticalSectionLocker lock(m_critsect); |
| 575 | |
| 576 | return m_internal->Suspend() ? wxTHREAD_NO_ERROR : wxTHREAD_MISC_ERROR; |
| 577 | } |
| 578 | |
| 579 | wxThreadError wxThread::Resume() |
| 580 | { |
| 581 | wxCriticalSectionLocker lock(m_critsect); |
| 582 | |
| 583 | return m_internal->Resume() ? wxTHREAD_NO_ERROR : wxTHREAD_MISC_ERROR; |
| 584 | } |
| 585 | |
| 586 | // stopping thread |
| 587 | // --------------- |
| 588 | |
| 589 | wxThread::ExitCode wxThread::Wait() |
| 590 | { |
| 591 | // although under MacOS we can wait for any thread, it's an error to |
| 592 | // wait for a detached one in wxWin API |
| 593 | wxCHECK_MSG( !IsDetached(), (ExitCode)-1, |
| 594 | _T("can't wait for detached thread") ); |
| 595 | |
| 596 | ExitCode rc = (ExitCode)-1; |
| 597 | |
| 598 | (void)Delete(&rc); |
| 599 | |
| 600 | m_internal->Free(); |
| 601 | |
| 602 | return rc; |
| 603 | } |
| 604 | |
| 605 | wxThreadError wxThread::Delete(ExitCode *pRc) |
| 606 | { |
| 607 | ExitCode rc = 0; |
| 608 | |
| 609 | // Delete() is always safe to call, so consider all possible states |
| 610 | |
| 611 | // has the thread started to run? |
| 612 | bool shouldResume = FALSE; |
| 613 | |
| 614 | { |
| 615 | wxCriticalSectionLocker lock(m_critsect); |
| 616 | |
| 617 | if ( m_internal->GetState() == STATE_NEW ) |
| 618 | { |
| 619 | // WinThreadStart() will see it and terminate immediately |
| 620 | m_internal->SetState(STATE_EXITED); |
| 621 | |
| 622 | shouldResume = TRUE; |
| 623 | } |
| 624 | } |
| 625 | |
| 626 | // is the thread paused? |
| 627 | if ( shouldResume || IsPaused() ) |
| 628 | Resume(); |
| 629 | |
| 630 | // does is still run? |
| 631 | if ( IsRunning() ) |
| 632 | { |
| 633 | if ( IsMain() ) |
| 634 | { |
| 635 | // set flag for wxIsWaitingForThread() |
| 636 | gs_waitingForThread = TRUE; |
| 637 | |
| 638 | #if wxUSE_GUI |
| 639 | wxBeginBusyCursor(); |
| 640 | #endif // wxUSE_GUI |
| 641 | } |
| 642 | |
| 643 | // ask the thread to terminate |
| 644 | { |
| 645 | wxCriticalSectionLocker lock(m_critsect); |
| 646 | |
| 647 | m_internal->Cancel(); |
| 648 | } |
| 649 | |
| 650 | #if wxUSE_GUI |
| 651 | // simply wait for the thread to terminate |
| 652 | while( TestDestroy() ) |
| 653 | { |
| 654 | ::YieldToAnyThread() ; |
| 655 | } |
| 656 | #else // !wxUSE_GUI |
| 657 | // simply wait for the thread to terminate |
| 658 | while( TestDestroy() ) |
| 659 | { |
| 660 | ::YieldToAnyThread() ; |
| 661 | } |
| 662 | #endif // wxUSE_GUI/!wxUSE_GUI |
| 663 | |
| 664 | if ( IsMain() ) |
| 665 | { |
| 666 | gs_waitingForThread = FALSE; |
| 667 | |
| 668 | #if wxUSE_GUI |
| 669 | wxEndBusyCursor(); |
| 670 | #endif // wxUSE_GUI |
| 671 | } |
| 672 | } |
| 673 | |
| 674 | // if ( !::GetExitCodeThread(hThread, (LPDWORD)&rc) ) |
| 675 | { |
| 676 | wxLogLastError("GetExitCodeThread"); |
| 677 | |
| 678 | rc = (ExitCode)-1; |
| 679 | } |
| 680 | |
| 681 | if ( IsDetached() ) |
| 682 | { |
| 683 | // if the thread exits normally, this is done in WinThreadStart, but in |
| 684 | // this case it would have been too early because |
| 685 | // MsgWaitForMultipleObject() would fail if the therad handle was |
| 686 | // closed while we were waiting on it, so we must do it here |
| 687 | delete this; |
| 688 | } |
| 689 | |
| 690 | // wxASSERT_MSG( (DWORD)rc != STILL_ACTIVE, |
| 691 | // wxT("thread must be already terminated.") ); |
| 692 | |
| 693 | if ( pRc ) |
| 694 | *pRc = rc; |
| 695 | |
| 696 | return rc == (ExitCode)-1 ? wxTHREAD_MISC_ERROR : wxTHREAD_NO_ERROR; |
| 697 | } |
| 698 | |
| 699 | wxThreadError wxThread::Kill() |
| 700 | { |
| 701 | if ( !IsRunning() ) |
| 702 | return wxTHREAD_NOT_RUNNING; |
| 703 | |
| 704 | // if ( !::TerminateThread(m_internal->GetHandle(), (DWORD)-1) ) |
| 705 | { |
| 706 | wxLogSysError(_("Couldn't terminate thread")); |
| 707 | |
| 708 | return wxTHREAD_MISC_ERROR; |
| 709 | } |
| 710 | |
| 711 | m_internal->Free(); |
| 712 | |
| 713 | if ( IsDetached() ) |
| 714 | { |
| 715 | delete this; |
| 716 | } |
| 717 | |
| 718 | return wxTHREAD_NO_ERROR; |
| 719 | } |
| 720 | |
| 721 | void wxThread::Exit(ExitCode status) |
| 722 | { |
| 723 | m_internal->Free(); |
| 724 | |
| 725 | if ( IsDetached() ) |
| 726 | { |
| 727 | delete this; |
| 728 | } |
| 729 | |
| 730 | m_internal->SetResult( status ) ; |
| 731 | |
| 732 | /* |
| 733 | #if defined(__VISUALC__) || (defined(__BORLANDC__) && (__BORLANDC__ >= 0x500)) |
| 734 | _endthreadex((unsigned)status); |
| 735 | #else // !VC++ |
| 736 | ::ExitThread((DWORD)status); |
| 737 | #endif // VC++/!VC++ |
| 738 | */ |
| 739 | wxFAIL_MSG(wxT("Couldn't return from ExitThread()!")); |
| 740 | } |
| 741 | |
| 742 | // priority setting |
| 743 | // ---------------- |
| 744 | |
| 745 | // since all these calls are execute cooperatively we don't have to use the critical section |
| 746 | |
| 747 | void wxThread::SetPriority(unsigned int prio) |
| 748 | { |
| 749 | m_internal->SetPriority(prio); |
| 750 | } |
| 751 | |
| 752 | unsigned int wxThread::GetPriority() const |
| 753 | { |
| 754 | return m_internal->GetPriority(); |
| 755 | } |
| 756 | |
| 757 | unsigned long wxThread::GetId() const |
| 758 | { |
| 759 | return (unsigned long)m_internal->GetId(); |
| 760 | } |
| 761 | |
| 762 | bool wxThread::IsRunning() const |
| 763 | { |
| 764 | return m_internal->GetState() == STATE_RUNNING; |
| 765 | } |
| 766 | |
| 767 | bool wxThread::IsAlive() const |
| 768 | { |
| 769 | return (m_internal->GetState() == STATE_RUNNING) || |
| 770 | (m_internal->GetState() == STATE_PAUSED); |
| 771 | } |
| 772 | |
| 773 | bool wxThread::IsPaused() const |
| 774 | { |
| 775 | return m_internal->GetState() == STATE_PAUSED; |
| 776 | } |
| 777 | |
| 778 | bool wxThread::TestDestroy() |
| 779 | { |
| 780 | return m_internal->GetState() == STATE_CANCELED; |
| 781 | } |
| 782 | |
| 783 | // ---------------------------------------------------------------------------- |
| 784 | // Automatic initialization for thread module |
| 785 | // ---------------------------------------------------------------------------- |
| 786 | |
| 787 | class wxThreadModule : public wxModule |
| 788 | { |
| 789 | public: |
| 790 | virtual bool OnInit(); |
| 791 | virtual void OnExit(); |
| 792 | |
| 793 | private: |
| 794 | DECLARE_DYNAMIC_CLASS(wxThreadModule) |
| 795 | }; |
| 796 | |
| 797 | IMPLEMENT_DYNAMIC_CLASS(wxThreadModule, wxModule) |
| 798 | |
| 799 | bool wxThreadModule::OnInit() |
| 800 | { |
| 801 | long response; |
| 802 | bool hasThreadManager ; |
| 803 | hasThreadManager = Gestalt( gestaltThreadMgrAttr, &response) == noErr && response & 1; |
| 804 | #if !TARGET_CARBON |
| 805 | #if GENERATINGCFM |
| 806 | // verify presence of shared library |
| 807 | hasThreadManager = hasThreadManager && ((Ptr)NewThread != (Ptr)kUnresolvedCFragSymbolAddress); |
| 808 | #endif |
| 809 | #endif |
| 810 | if ( !hasThreadManager ) |
| 811 | { |
| 812 | wxMessageBox( "Error" , "Thread Support is not available on this System" , wxOK ) ; |
| 813 | return FALSE ; |
| 814 | } |
| 815 | |
| 816 | // no error return for GetCurrentThreadId() |
| 817 | MacGetCurrentThread( &gs_idMainThread ) ; |
| 818 | |
| 819 | return TRUE; |
| 820 | } |
| 821 | |
| 822 | void wxThreadModule::OnExit() |
| 823 | { |
| 824 | } |
| 825 | |
| 826 | // ---------------------------------------------------------------------------- |
| 827 | // under MacOS we don't have currently preemptive threads, so any thread may access |
| 828 | // the GUI at any time |
| 829 | // ---------------------------------------------------------------------------- |
| 830 | |
| 831 | void WXDLLEXPORT wxMutexGuiEnter() |
| 832 | { |
| 833 | } |
| 834 | |
| 835 | void WXDLLEXPORT wxMutexGuiLeave() |
| 836 | { |
| 837 | } |
| 838 | |
| 839 | void WXDLLEXPORT wxMutexGuiLeaveOrEnter() |
| 840 | { |
| 841 | } |
| 842 | |
| 843 | bool WXDLLEXPORT wxGuiOwnedByMainThread() |
| 844 | { |
| 845 | return false ; |
| 846 | } |
| 847 | |
| 848 | // wake up the main thread |
| 849 | void WXDLLEXPORT wxWakeUpMainThread() |
| 850 | { |
| 851 | wxMacWakeUp() ; |
| 852 | } |
| 853 | |
| 854 | bool WXDLLEXPORT wxIsWaitingForThread() |
| 855 | { |
| 856 | return false ; |
| 857 | } |
| 858 | |
| 859 | #endif // wxUSE_THREADS |
| 860 | |