X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/f6bcfd974ef26faf6f91a62cac09827e09463fd1..1978421a6d8b81c1f8a961da4b8ddf544fec7b1b:/src/os2/thread.cpp?ds=inline diff --git a/src/os2/thread.cpp b/src/os2/thread.cpp index 94de24c7cd..eefb6d5f15 100644 --- a/src/os2/thread.cpp +++ b/src/os2/thread.cpp @@ -1,14 +1,19 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: thread.cpp -// Purpose: wxThread Implementation. For Unix ports, see e.g. src/gtk -// Author: Original from Wolfram Gloger/Guilhem Lavaux -// Modified by: David Webster +// Name: src/os2/thread.cpp +// Purpose: wxThread Implementation +// Author: Original from Wolfram Gloger/Guilhem Lavaux/David Webster +// Modified by: Stefan Neis // Created: 04/22/98 // RCS-ID: $Id$ -// Copyright: (c) Wolfram Gloger (1996, 1997); Guilhem Lavaux (1998) +// Copyright: (c) Stefan Neis (2003) +// // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// +#ifdef __GNUG__ + #pragma implementation "thread.h" +#endif + // ---------------------------------------------------------------------------- // headers // ---------------------------------------------------------------------------- @@ -20,15 +25,21 @@ #include +#include "wx/app.h" #include "wx/module.h" +#include "wx/intl.h" +#include "wx/utils.h" +#include "wx/log.h" #include "wx/thread.h" #define INCL_DOSSEMAPHORES #define INCL_DOSPROCESS +#define INCL_DOSMISC #define INCL_ERRORS #include +#ifndef __EMX__ #include - +#endif // the possible states of the thread ("=>" shows all possible transitions from // this state) enum wxThreadState @@ -41,12 +52,12 @@ enum wxThreadState }; // ---------------------------------------------------------------------------- -// static variables +// this module's globals // ---------------------------------------------------------------------------- // id of the main thread - the one which can call GUI functions without first // calling wxMutexGuiEnter() -static ULONG s_ulIdMainThread = 0; +static ULONG s_ulIdMainThread = 1; wxMutex* p_wxMainMutex; // OS2 substitute for Tls pointer the current parent thread object @@ -70,7 +81,7 @@ static size_t gs_nWaitingForGui = 0; static bool gs_bWaitingForThread = FALSE; // ============================================================================ -// OS/2 implementation of thread classes +// OS/2 implementation of thread and related classes // ============================================================================ // ---------------------------------------------------------------------------- @@ -79,38 +90,56 @@ static bool gs_bWaitingForThread = FALSE; class wxMutexInternal { public: + wxMutexInternal(wxMutexType mutexType); + ~wxMutexInternal(); + + bool IsOk() const { return m_vMutex != NULL; } + + wxMutexError Lock() { return LockTimeout(SEM_INDEFINITE_WAIT); } + wxMutexError TryLock() { return LockTimeout(SEM_IMMEDIATE_RETURN); } + wxMutexError Unlock(); + +private: + wxMutexError LockTimeout(ULONG ulMilliseconds); HMTX m_vMutex; }; -wxMutex::wxMutex() +// all mutexes are "pseudo-"recursive under OS2 so we don't use mutexType +// (Calls to DosRequestMutexSem and DosReleaseMutexSem can be nested, but +// the request count for a semaphore cannot exceed 65535. If an attempt is +// made to exceed this number, ERROR_TOO_MANY_SEM_REQUESTS is returned.) +wxMutexInternal::wxMutexInternal( + wxMutexType WXUNUSED(eMutexType) +) { APIRET ulrc; - m_internal = new wxMutexInternal; - ulrc = ::DosCreateMutexSem(NULL, &m_internal->m_vMutex, 0L, FALSE); + ulrc = ::DosCreateMutexSem(NULL, &m_vMutex, 0L, FALSE); if (ulrc != 0) { wxLogSysError(_("Can not create mutex.")); + m_vMutex = NULL; } - m_locked = 0; } -wxMutex::~wxMutex() +wxMutexInternal::~wxMutexInternal() { - if (m_locked > 0) - wxLogDebug(wxT("Warning: freeing a locked mutex (%d locks)."), m_locked); - ::DosCloseMutexSem(m_internal->m_vMutex); - m_internal->m_vMutex = NULL; + if (m_vMutex) + { + if (::DosCloseMutexSem(m_vMutex)) + wxLogLastError(_T("DosCloseMutexSem(mutex)")); + } } -wxMutexError wxMutex::Lock() +wxMutexError wxMutexInternal::LockTimeout(ULONG ulMilliseconds) { APIRET ulrc; - ulrc = ::DosRequestMutexSem(m_internal->m_vMutex, SEM_INDEFINITE_WAIT); + ulrc = ::DosRequestMutexSem(m_vMutex, ulMilliseconds); switch (ulrc) { + case ERROR_TIMEOUT: case ERROR_TOO_MANY_SEM_REQUESTS: return wxMUTEX_BUSY; @@ -124,34 +153,18 @@ wxMutexError wxMutex::Lock() wxLogSysError(_("Couldn't acquire a mutex lock")); return wxMUTEX_MISC_ERROR; - case ERROR_TIMEOUT: default: wxFAIL_MSG(wxT("impossible return value in wxMutex::Lock")); - } - m_locked++; - return wxMUTEX_NO_ERROR; -} - -wxMutexError wxMutex::TryLock() -{ - ULONG ulrc; - - ulrc = ::DosRequestMutexSem(m_internal->m_vMutex, SEM_IMMEDIATE_RETURN /*0L*/); - if (ulrc == ERROR_TIMEOUT || ulrc == ERROR_TOO_MANY_SEM_REQUESTS) - return wxMUTEX_BUSY; - - m_locked++; + return wxMUTEX_MISC_ERROR; + } return wxMUTEX_NO_ERROR; } -wxMutexError wxMutex::Unlock() +wxMutexError wxMutexInternal::Unlock() { APIRET ulrc; - if (m_locked > 0) - m_locked--; - - ulrc = ::DosReleaseMutexSem(m_internal->m_vMutex); + ulrc = ::DosReleaseMutexSem(m_vMutex); if (ulrc != 0) { wxLogSysError(_("Couldn't release a mutex")); @@ -160,126 +173,163 @@ wxMutexError wxMutex::Unlock() return wxMUTEX_NO_ERROR; } -// ---------------------------------------------------------------------------- -// wxCondition implementation -// ---------------------------------------------------------------------------- +// -------------------------------------------------------------------------- +// wxSemaphore +// -------------------------------------------------------------------------- -class wxConditionInternal +// a trivial wrapper around OS2 event semaphore +class wxSemaphoreInternal { public: - inline wxConditionInternal () - { - ::DosCreateEventSem(NULL, &m_vEvent, DC_SEM_SHARED, FALSE); - if (!m_vEvent) - { - wxLogSysError(_("Can not create event semaphore.")); - } - m_nWaiters = 0; - } + wxSemaphoreInternal(int initialcount, int maxcount); + ~wxSemaphoreInternal(); - inline bool Wait( - unsigned long ulTimeout - ) - { - APIRET ulrc; + bool IsOk() const { return m_vEvent != NULL; } - m_nWaiters++; - ulrc = ::DosWaitEventSem(m_vEvent, ulTimeout); - m_nWaiters--; - return (ulrc != ERROR_TIMEOUT); - } - - inline ~wxConditionInternal () - { - APIRET ulrc; + wxSemaError Wait() { return WaitTimeout(SEM_INDEFINITE_WAIT); } + wxSemaError TryWait() { return WaitTimeout(SEM_IMMEDIATE_RETURN); } + wxSemaError WaitTimeout(unsigned long milliseconds); - if (m_vEvent) - { - ulrc = ::DosCloseEventSem(m_vEvent); - if (!ulrc) - { - wxLogLastError("DosCloseEventSem(m_vEvent)"); - } - } - } + wxSemaError Post(); - HEV m_vEvent; - int m_nWaiters; +private: + HEV m_vEvent; + HMTX m_vMutex; + int m_count; + int m_maxcount; }; -wxCondition::wxCondition() +wxSemaphoreInternal::wxSemaphoreInternal(int initialcount, int maxcount) { - APIRET ulrc; - ULONG ulCount; + APIRET ulrc; + if ( maxcount == 0 ) + { + // make it practically infinite + maxcount = INT_MAX; + } - m_internal = new wxConditionInternal; - ulrc = ::DosCreateEventSem(NULL, &m_internal->m_vEvent, 0L, FALSE); + m_count = initialcount; + m_maxcount = maxcount; + ulrc = ::DosCreateMutexSem(NULL, &m_vMutex, 0L, FALSE); if (ulrc != 0) { - wxLogSysError(_("Can not create event object.")); + wxLogLastError(_T("DosCreateMutexSem()")); + m_vMutex = NULL; + m_vEvent = NULL; + return; } - m_internal->m_nWaiters = 0; - // ?? just for good measure? - ::DosResetEventSem(m_internal->m_vEvent, &ulCount); -} - -wxCondition::~wxCondition() -{ - ::DosCloseEventSem(m_internal->m_vEvent); - delete m_internal; - m_internal = NULL; -} - -void wxCondition::Wait() -{ - (void)m_internal->Wait(SEM_INDEFINITE_WAIT); -} - -bool wxCondition::Wait( - unsigned long lSec -, unsigned long lNsec) -{ - return m_internal->Wait(lSec*1000 + lNsec/1000000); -} - -void wxCondition::Signal() -{ - ::DosPostEventSem(m_internal->m_vEvent); + ulrc = ::DosCreateEventSem(NULL, &m_vEvent, 0L, FALSE); + if ( ulrc != 0) + { + wxLogLastError(_T("DosCreateEventSem()")); + ::DosCloseMutexSem(m_vMutex); + m_vMutex = NULL; + m_vEvent = NULL; + } + if (initialcount) + ::DosPostEventSem(m_vEvent); } -void wxCondition::Broadcast() +wxSemaphoreInternal::~wxSemaphoreInternal() { - int i; - - for (i = 0; i < m_internal->m_nWaiters; i++) + if ( m_vEvent ) { - if (::DosPostEventSem(m_internal->m_vEvent) != 0) + if ( ::DosCloseEventSem(m_vEvent) ) { - wxLogSysError(_("Couldn't change the state of event object.")); + wxLogLastError(_T("DosCloseEventSem(semaphore)")); } + if ( ::DosCloseMutexSem(m_vMutex) ) + { + wxLogLastError(_T("DosCloseMutexSem(semaphore)")); + } + else + m_vEvent = NULL; } } -// ---------------------------------------------------------------------------- -// wxCriticalSection implementation -// ---------------------------------------------------------------------------- - -wxCriticalSection::wxCriticalSection() +wxSemaError wxSemaphoreInternal::WaitTimeout(unsigned long ulMilliseconds) { + APIRET ulrc; + do { + ulrc = ::DosWaitEventSem(m_vEvent, ulMilliseconds ); + switch ( ulrc ) + { + case NO_ERROR: + break; + + case ERROR_TIMEOUT: + if (ulMilliseconds == SEM_IMMEDIATE_RETURN) + return wxSEMA_BUSY; + else + return wxSEMA_TIMEOUT; + + default: + wxLogLastError(_T("DosWaitEventSem(semaphore)")); + return wxSEMA_MISC_ERROR; + } + ulrc = :: DosRequestMutexSem(m_vMutex, ulMilliseconds); + switch ( ulrc ) + { + case NO_ERROR: + // ok + break; + + case ERROR_TIMEOUT: + case ERROR_TOO_MANY_SEM_REQUESTS: + if (ulMilliseconds == SEM_IMMEDIATE_RETURN) + return wxSEMA_BUSY; + else + return wxSEMA_TIMEOUT; + + default: + wxFAIL_MSG(wxT("DosRequestMutexSem(mutex)")); + return wxSEMA_MISC_ERROR; + } + bool OK = false; + if (m_count > 0) + { + m_count--; + OK = true; + } + else + { + ULONG ulPostCount; + ::DosResetEventSem(m_vEvent, &ulPostCount); + } + ::DosReleaseMutexSem(m_vMutex); + if (OK) + return wxSEMA_NO_ERROR; + } while (ulMilliseconds == SEM_INDEFINITE_WAIT); + + if (ulMilliseconds == SEM_IMMEDIATE_RETURN) + return wxSEMA_BUSY; + return wxSEMA_TIMEOUT; } -wxCriticalSection::~wxCriticalSection() +wxSemaError wxSemaphoreInternal::Post() { -} + APIRET ulrc; + ulrc = ::DosRequestMutexSem(m_vMutex, SEM_INDEFINITE_WAIT); + if (ulrc != NO_ERROR) + return wxSEMA_MISC_ERROR; + bool OK = false; + if (m_count < m_maxcount) + { + m_count++; + ulrc = ::DosPostEventSem(m_vEvent); + OK = true; + } + ::DosReleaseMutexSem(m_vMutex); + if (!OK) + return wxSEMA_OVERFLOW; + if ( ulrc != NO_ERROR && ulrc != ERROR_ALREADY_POSTED ) + { + wxLogLastError(_T("DosPostEventSem(semaphore)")); -void wxCriticalSection::Enter() -{ - ::DosEnterCritSec(); -} + return wxSEMA_MISC_ERROR; + } -void wxCriticalSection::Leave() -{ - ::DosExitCritSec(); + return wxSEMA_NO_ERROR; } // ---------------------------------------------------------------------------- @@ -296,25 +346,18 @@ public: { m_hThread = 0; m_eState = STATE_NEW; - m_nPriority = 0; + m_nPriority = WXTHREAD_DEFAULT_PRIORITY; } ~wxThreadInternal() { - Free(); - } - - void Free() - { - if (m_hThread) - { - ::DosExit(0,0); - m_hThread = 0; - } + m_hThread = 0; } // create a new (suspended) thread (for the given thread object) - bool Create(wxThread* pThread); + bool Create( wxThread* pThread + ,unsigned int uStackSize + ); // suspend/resume/terminate bool Suspend(); @@ -334,7 +377,7 @@ public: TID GetId() const { return m_hThread; } // thread function - static DWORD OS2ThreadStart(wxThread *thread); + static DWORD OS2ThreadStart(ULONG ulParam); private: // Threads in OS/2 have only an ID, so m_hThread is both it's handle and ID @@ -346,21 +389,32 @@ private: }; ULONG wxThreadInternal::OS2ThreadStart( - wxThread* pThread + ULONG ulParam ) { - m_pThread = pThread; - - DWORD dwRet = (DWORD)pThread->Entry(); + DWORD dwRet; + bool bWasCancelled; - // enter m_critsect before changing the thread state - pThread->m_critsect.Enter(); + // first of all, check whether we hadn't been cancelled already and don't + // start the user code at all then + wxThread *pThread = (wxThread *)ulParam; + if ( pThread->m_internal->GetState() == STATE_EXITED ) + { + dwRet = (DWORD)-1; + bWasCancelled = TRUE; + } + else // do run thread + { + dwRet = (DWORD)pThread->Entry(); - bool bWasCancelled = pThread->m_internal->GetState() == STATE_CANCELED; + // enter m_critsect before changing the thread state + pThread->m_critsect.Enter(); - pThread->m_internal->SetState(STATE_EXITED); - pThread->m_critsect.Leave(); + bWasCancelled = pThread->m_internal->GetState() == STATE_CANCELED; + pThread->m_internal->SetState(STATE_EXITED); + pThread->m_critsect.Leave(); + } pThread->OnExit(); // if the thread was cancelled (from Delete()), then it the handle is still @@ -379,29 +433,28 @@ void wxThreadInternal::SetPriority( ) { // translate wxWindows priority to the PM one - ULONG ulOS2_Priority; + ULONG ulOS2_PriorityClass; + ULONG ulOS2_SubPriority; ULONG ulrc; m_nPriority = nPriority; - - if (m_nPriority <= 20) - ulOS2_Priority = PRTYC_NOCHANGE; - else if (m_nPriority <= 40) - ulOS2_Priority = PRTYC_IDLETIME; - else if (m_nPriority <= 60) - ulOS2_Priority = PRTYC_REGULAR; - else if (m_nPriority <= 80) - ulOS2_Priority = PRTYC_TIMECRITICAL; + if (m_nPriority <= 25) + ulOS2_PriorityClass = PRTYC_IDLETIME; + else if (m_nPriority <= 50) + ulOS2_PriorityClass = PRTYC_REGULAR; + else if (m_nPriority <= 75) + ulOS2_PriorityClass = PRTYC_TIMECRITICAL; else if (m_nPriority <= 100) - ulOS2_Priority = PRTYC_FOREGROUNDSERVER; + ulOS2_PriorityClass = PRTYC_FOREGROUNDSERVER; else { wxFAIL_MSG(wxT("invalid value of thread priority parameter")); - ulOS2_Priority = PRTYC_REGULAR; + ulOS2_PriorityClass = PRTYC_REGULAR; } + ulOS2_SubPriority = (ULONG) (((m_nPriority - 1) % 25 + 1) * 31.0 / 25); ulrc = ::DosSetPriority( PRTYS_THREAD - ,ulOS2_Priority - ,0 + ,ulOS2_PriorityClass + ,ulOS2_SubPriority ,(ULONG)m_hThread ); if (ulrc != 0) @@ -412,6 +465,7 @@ void wxThreadInternal::SetPriority( bool wxThreadInternal::Create( wxThread* pThread +, unsigned int uStackSize ) { APIRET ulrc; @@ -420,7 +474,7 @@ bool wxThreadInternal::Create( ,(PFNTHREAD)wxThreadInternal::OS2ThreadStart ,(ULONG)pThread ,CREATE_SUSPENDED | STACK_SPARSE - ,8192L + ,(ULONG)uStackSize ); if(ulrc != 0) { @@ -432,6 +486,7 @@ bool wxThreadInternal::Create( { SetPriority(m_nPriority); } + return(TRUE); } @@ -457,7 +512,15 @@ bool wxThreadInternal::Resume() wxLogSysError(_("Can not suspend thread %lu"), m_hThread); return FALSE; } - m_eState = STATE_PAUSED; + + // don't change the state from STATE_EXITED because it's special and means + // we are going to terminate without running any user code - if we did it, + // the codei n Delete() wouldn't work + if ( m_eState != STATE_EXITED ) + { + m_eState = STATE_RUNNING; + } + return TRUE; } @@ -498,6 +561,40 @@ void wxThread::Sleep( ::DosSleep(ulMilliseconds); } +int wxThread::GetCPUCount() +{ + ULONG CPUCount; + APIRET ulrc; + ulrc = ::DosQuerySysInfo(26, 26, (void *)&CPUCount, sizeof(ULONG)); + // QSV_NUMPROCESSORS(26) is typically not defined in header files + + if (ulrc != 0) + CPUCount = 1; + + return CPUCount; +} + +unsigned long wxThread::GetCurrentId() +{ + PTIB ptib; + PPIB ppib; + + ::DosGetInfoBlocks(&ptib, &ppib); + return (unsigned long) ptib->tib_ptib2->tib2_ultid; +} + +bool wxThread::SetConcurrency(size_t level) +{ + wxASSERT_MSG( IsMain(), _T("should only be called from the main thread") ); + + // ok only for the default one + if ( level == 0 ) + return 0; + + // Don't know how to realize this on OS/2. + return level == 1; +} + // ctor and dtor // ------------- @@ -516,9 +613,13 @@ wxThread::~wxThread() // create/start thread // ------------------- -wxThreadError wxThread::Create() +wxThreadError wxThread::Create( + unsigned int uStackSize +) { - if ( !m_internal->Create(this) ) + wxCriticalSectionLocker lock((wxCriticalSection &)m_critsect); + + if ( !m_internal->Create(this, uStackSize) ) return wxTHREAD_NO_RESOURCE; return wxTHREAD_NO_ERROR; @@ -564,7 +665,6 @@ wxThread::ExitCode wxThread::Wait() _T("can't wait for detached thread") ); ExitCode rc = (ExitCode)-1; (void)Delete(&rc); - m_internal->Free(); return(rc); } @@ -573,57 +673,134 @@ wxThreadError wxThread::Delete(ExitCode *pRc) ExitCode rc = 0; // Delete() is always safe to call, so consider all possible states - if (IsPaused()) + + // we might need to resume the thread, but we might also not need to cancel + // it if it doesn't run yet + bool shouldResume = FALSE, + shouldCancel = TRUE, + isRunning = FALSE; + + // check if the thread already started to run + { + wxCriticalSectionLocker lock((wxCriticalSection &)m_critsect); + + if ( m_internal->GetState() == STATE_NEW ) + { + // WinThreadStart() will see it and terminate immediately, no need + // to cancel the thread - but we still need to resume it to let it + // run + m_internal->SetState(STATE_EXITED); + + Resume(); // it knows about STATE_EXITED special case + + shouldCancel = FALSE; + isRunning = TRUE; + + // shouldResume is correctly set to FALSE here + } + else + { + shouldResume = IsPaused(); + } + } + + // resume the thread if it is paused + if ( shouldResume ) Resume(); TID hThread = m_internal->GetHandle(); - if (IsRunning()) + if ( isRunning || IsRunning()) { if (IsMain()) { // set flag for wxIsWaitingForThread() gs_bWaitingForThread = TRUE; - -#if wxUSE_GUI - wxBeginBusyCursor(); -#endif // wxUSE_GUI - } + } // ask the thread to terminate + if ( shouldCancel ) { wxCriticalSectionLocker lock(m_critsect); + m_internal->Cancel(); } #if wxUSE_GUI - // need a way to finish GUI processing before killing the thread - // until then we just exit - - if ((gs_nWaitingForGui > 0) && wxGuiOwnedByMainThread()) + // we can't just wait for the thread to terminate because it might be + // calling some GUI functions and so it will never terminate before we + // process the Windows messages that result from these functions + DWORD result = 0; // suppress warnings from broken compilers + do { - wxMutexGuiLeave(); - } -#else // !wxUSE_GUI + if ( IsMain() ) + { + // give the thread we're waiting for chance to do the GUI call + // it might be in + if ( (gs_nWaitingForGui > 0) && wxGuiOwnedByMainThread() ) + { + wxMutexGuiLeave(); + } + } - // can't wait for yourself to end under OS/2 so just quit + result = ::DosWaitThread(&hThread, DCWW_WAIT); + // FIXME: We ought to have a message processing loop here!! + switch ( result ) + { + case ERROR_THREAD_NOT_TERMINATED: + case ERROR_INVALID_THREADID: + // error + wxLogSysError(_("Can not wait for thread termination")); + Kill(); + return wxTHREAD_KILLED; + + case NO_ERROR: + // thread we're waiting for terminated + break; + + default: + wxFAIL_MSG(wxT("unexpected result of DosWaitThread")); + } + } while ( result != NO_ERROR ); +#else // !wxUSE_GUI + // simply wait for the thread to terminate + // + // OTOH, even console apps create windows (in wxExecute, for WinSock + // &c), so may be use MsgWaitForMultipleObject() too here? + if ( ::DosWaitThread(&hThread, DCWW_WAIT) != NO_ERROR ) + { + wxFAIL_MSG(wxT("unexpected result of DosWaitThread")); + } #endif // wxUSE_GUI/!wxUSE_GUI if ( IsMain() ) { gs_bWaitingForThread = FALSE; - -#if wxUSE_GUI - wxEndBusyCursor(); -#endif // wxUSE_GUI } } - ::DosExit(0, 0); - // probably won't get this far, but - if (IsDetached()) +#if 0 + // although the thread might be already in the EXITED state it might not + // have terminated yet and so we are not sure that it has actually + // terminated if the "if" above hadn't been taken + do { + if ( !::GetExitCodeThread(hThread, (LPDWORD)&rc) ) + { + wxLogLastError(wxT("GetExitCodeThread")); + + rc = (ExitCode)-1; + } + } while ( (DWORD)rc == STILL_ACTIVE ); +#endif + + if ( IsDetached() ) + { + // if the thread exits normally, this is done in WinThreadStart, but in + // this case it would have been too early because + // MsgWaitForMultipleObject() would fail if the thread handle was + // closed while we were waiting on it, so we must do it here delete this; } @@ -639,7 +816,6 @@ wxThreadError wxThread::Kill() return wxTHREAD_NOT_RUNNING; ::DosKillThread(m_internal->GetHandle()); - m_internal->Free(); if (IsDetached()) { delete this; @@ -651,7 +827,6 @@ void wxThread::Exit( ExitCode pStatus ) { - m_internal->Free(); delete this; ::DosExit(EXIT_THREAD, ULONG(pStatus)); wxFAIL_MSG(wxT("Couldn't return from DosExit()!")); @@ -761,9 +936,36 @@ void wxThreadModule::OnExit() // Helper functions // ---------------------------------------------------------------------------- -// Does nothing under OS/2 [for now] +// wake up the main thread if it's in ::GetMessage() void WXDLLEXPORT wxWakeUpMainThread() { + if ( !::WinPostQueueMsg(wxTheApp->m_hMq, WM_NULL, 0, 0) ) + { + // should never happen + wxLogLastError(wxT("WinPostMessage(WM_NULL)")); + } +} + +void WXDLLEXPORT wxMutexGuiEnter() +{ + // this would dead lock everything... + wxASSERT_MSG( !wxThread::IsMain(), + wxT("main thread doesn't want to block in wxMutexGuiEnter()!") ); + + // the order in which we enter the critical sections here is crucial!! + + // set the flag telling to the main thread that we want to do some GUI + { + wxCriticalSectionLocker enter(*gs_pCritsectWaitingForGui); + + gs_nWaitingForGui++; + } + + wxWakeUpMainThread(); + + // now we may block here because the main thread will soon let us in + // (during the next iteration of OnIdle()) + gs_pCritsectGui->Enter(); } void WXDLLEXPORT wxMutexGuiLeave() @@ -828,5 +1030,11 @@ bool WXDLLEXPORT wxIsWaitingForThread() return gs_bWaitingForThread; } +// ---------------------------------------------------------------------------- +// include common implementation code +// ---------------------------------------------------------------------------- + +#include "wx/thrimpl.cpp" + #endif // wxUSE_THREADS