X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/e78c4d503ecd57835502fb1bbd13a71cb99019d0..5549e9f76fb5cbfb2a2190980983bcebea132a2e:/src/os2/thread.cpp

diff --git a/src/os2/thread.cpp b/src/os2/thread.cpp
index a26fbf6e4b..94de24c7cd 100644
--- a/src/os2/thread.cpp
+++ b/src/os2/thread.cpp
@@ -53,21 +53,21 @@ wxMutex*                            p_wxMainMutex;
 wxThread*                           m_pThread;    // pointer to the wxWindows thread object
 
 // if it's FALSE, some secondary thread is holding the GUI lock
-static bool s_bGuiOwnedByMainThread = TRUE;
+static bool gs_bGuiOwnedByMainThread = TRUE;
 
 // critical section which controls access to all GUI functions: any secondary
 // thread (i.e. except the main one) must enter this crit section before doing
 // any GUI calls
-static wxCriticalSection *s_pCritsectGui = NULL;
+static wxCriticalSection *gs_pCritsectGui = NULL;
 
 // critical section which protects s_nWaitingForGui variable
-static wxCriticalSection *s_pCritsectWaitingForGui = NULL;
+static wxCriticalSection *gs_pCritsectWaitingForGui = NULL;
 
 // number of threads waiting for GUI in wxMutexGuiEnter()
-static size_t s_nWaitingForGui = 0;
+static size_t gs_nWaitingForGui = 0;
 
 // are we waiting for a thread termination?
-static bool s_bWaitingForThread = FALSE;
+static bool gs_bWaitingForThread = FALSE;
 
 // ============================================================================
 // OS/2 implementation of thread classes
@@ -86,8 +86,8 @@ wxMutex::wxMutex()
 {
     APIRET                          ulrc;
 
-    p_internal = new wxMutexInternal;
-    ulrc = ::DosCreateMutexSem(NULL, &p_internal->m_vMutex, 0L, FALSE);
+    m_internal = new wxMutexInternal;
+    ulrc = ::DosCreateMutexSem(NULL, &m_internal->m_vMutex, 0L, FALSE);
     if (ulrc != 0)
     {
         wxLogSysError(_("Can not create mutex."));
@@ -99,15 +99,15 @@ wxMutex::~wxMutex()
 {
     if (m_locked > 0)
         wxLogDebug(wxT("Warning: freeing a locked mutex (%d locks)."), m_locked);
-    ::DosCloseMutexSem(p_internal->m_vMutex);
-    p_internal->m_vMutex = NULL;
+    ::DosCloseMutexSem(m_internal->m_vMutex);
+    m_internal->m_vMutex = NULL;
 }
 
 wxMutexError wxMutex::Lock()
 {
     APIRET                          ulrc;
 
-    ulrc = ::DosRequestMutexSem(p_internal->m_vMutex, SEM_INDEFINITE_WAIT);
+    ulrc = ::DosRequestMutexSem(m_internal->m_vMutex, SEM_INDEFINITE_WAIT);
 
     switch (ulrc)
     {
@@ -136,7 +136,7 @@ wxMutexError wxMutex::TryLock()
 {
     ULONG                           ulrc;
 
-    ulrc = ::DosRequestMutexSem(p_internal->m_vMutex, SEM_IMMEDIATE_RETURN /*0L*/);
+    ulrc = ::DosRequestMutexSem(m_internal->m_vMutex, SEM_IMMEDIATE_RETURN /*0L*/);
     if (ulrc == ERROR_TIMEOUT || ulrc == ERROR_TOO_MANY_SEM_REQUESTS)
         return wxMUTEX_BUSY;
 
@@ -151,7 +151,7 @@ wxMutexError wxMutex::Unlock()
     if (m_locked > 0)
         m_locked--;
 
-    ulrc = ::DosReleaseMutexSem(p_internal->m_vMutex);
+    ulrc = ::DosReleaseMutexSem(m_internal->m_vMutex);
     if (ulrc != 0)
     {
         wxLogSysError(_("Couldn't release a mutex"));
@@ -167,6 +167,42 @@ wxMutexError wxMutex::Unlock()
 class wxConditionInternal
 {
 public:
+    inline wxConditionInternal ()
+    {
+        ::DosCreateEventSem(NULL, &m_vEvent, DC_SEM_SHARED, FALSE);
+        if (!m_vEvent)
+        {
+            wxLogSysError(_("Can not create event semaphore."));
+        }
+        m_nWaiters = 0;
+    }
+
+    inline bool Wait(
+      unsigned long                 ulTimeout
+    )
+    {
+        APIRET                      ulrc;
+
+        m_nWaiters++;
+        ulrc = ::DosWaitEventSem(m_vEvent, ulTimeout);
+        m_nWaiters--;
+        return (ulrc != ERROR_TIMEOUT);
+    }
+
+    inline ~wxConditionInternal ()
+    {
+        APIRET                      ulrc;
+
+        if (m_vEvent)
+        {
+            ulrc = ::DosCloseEventSem(m_vEvent);
+            if (!ulrc)
+            {
+                wxLogLastError("DosCloseEventSem(m_vEvent)");
+            }
+        }
+    }
+
     HEV                             m_vEvent;
     int                             m_nWaiters;
 };
@@ -176,69 +212,76 @@ wxCondition::wxCondition()
     APIRET                          ulrc;
     ULONG                           ulCount;
 
-    p_internal = new wxConditionInternal;
-    ulrc = ::DosCreateEventSem(NULL, &p_internal->m_vEvent, 0L, FALSE);
+    m_internal = new wxConditionInternal;
+    ulrc = ::DosCreateEventSem(NULL, &m_internal->m_vEvent, 0L, FALSE);
     if (ulrc != 0)
     {
         wxLogSysError(_("Can not create event object."));
     }
-    p_internal->m_nWaiters = 0;
+    m_internal->m_nWaiters = 0;
     // ?? just for good measure?
-    ::DosResetEventSem(p_internal->m_vEvent, &ulCount);
+    ::DosResetEventSem(m_internal->m_vEvent, &ulCount);
 }
 
 wxCondition::~wxCondition()
 {
-    ::DosCloseEventSem(p_internal->m_vEvent);
-    delete p_internal;
-    p_internal = NULL;
+    ::DosCloseEventSem(m_internal->m_vEvent);
+    delete m_internal;
+    m_internal = NULL;
 }
 
-void wxCondition::Wait(
-  wxMutex&                          rMutex
-)
+void wxCondition::Wait()
 {
-    rMutex.Unlock();
-    p_internal->m_nWaiters++;
-    ::DosWaitEventSem(p_internal->m_vEvent, SEM_INDEFINITE_WAIT);
-    p_internal->m_nWaiters--;
-    rMutex.Lock();
+    (void)m_internal->Wait(SEM_INDEFINITE_WAIT);
 }
 
 bool wxCondition::Wait(
-  wxMutex&                          rMutex
-, unsigned long                     ulSec
-, unsigned long                     ulMillisec)
+  unsigned long                     lSec
+, unsigned long                     lNsec)
 {
-    APIRET                          ulrc;
-
-    rMutex.Unlock();
-    p_internal->m_nWaiters++;
-    ulrc = ::DosWaitEventSem(p_internal->m_vEvent, ULONG((ulSec * 1000L) + ulMillisec));
-    p_internal->m_nWaiters--;
-    rMutex.Lock();
-
-    return (ulrc != ERROR_TIMEOUT);
+    return m_internal->Wait(lSec*1000 + lNsec/1000000);
 }
 
 void wxCondition::Signal()
 {
-    ::DosPostEventSem(p_internal->m_vEvent);
+    ::DosPostEventSem(m_internal->m_vEvent);
 }
 
 void wxCondition::Broadcast()
 {
     int                             i;
 
-    for (i = 0; i < p_internal->m_nWaiters; i++)
+    for (i = 0; i < m_internal->m_nWaiters; i++)
     {
-        if (::DosPostEventSem(p_internal->m_vEvent) != 0)
+        if (::DosPostEventSem(m_internal->m_vEvent) != 0)
         {
             wxLogSysError(_("Couldn't change the state of event object."));
         }
     }
 }
 
+// ----------------------------------------------------------------------------
+// wxCriticalSection implementation
+// ----------------------------------------------------------------------------
+
+wxCriticalSection::wxCriticalSection()
+{
+}
+
+wxCriticalSection::~wxCriticalSection()
+{
+}
+
+void wxCriticalSection::Enter()
+{
+    ::DosEnterCritSec();
+}
+
+void wxCriticalSection::Leave()
+{
+    ::DosExitCritSec();
+}
+
 // ----------------------------------------------------------------------------
 // wxThread implementation
 // ----------------------------------------------------------------------------
@@ -256,6 +299,20 @@ public:
         m_nPriority = 0;
     }
 
+    ~wxThreadInternal()
+    {
+        Free();
+    }
+
+    void Free()
+    {
+        if (m_hThread)
+        {
+            ::DosExit(0,0);
+            m_hThread = 0;
+        }
+    }
+
     // create a new (suspended) thread (for the given thread object)
     bool Create(wxThread* pThread);
 
@@ -269,7 +326,7 @@ public:
     inline wxThreadState GetState() const { return m_eState; }
 
     // thread priority
-    inline void SetPriority(unsigned int nPriority) { m_nPriority = nPriority; }
+    void                SetPriority(unsigned int nPriority);
     inline unsigned int GetPriority() const { return m_nPriority; }
 
     // thread handle and id
@@ -296,35 +353,36 @@ ULONG wxThreadInternal::OS2ThreadStart(
 
     DWORD                           dwRet = (DWORD)pThread->Entry();
 
-    pThread->p_internal->SetState(STATE_EXITED);
+    // enter m_critsect before changing the thread state
+    pThread->m_critsect.Enter();
+
+    bool                            bWasCancelled = pThread->m_internal->GetState() == STATE_CANCELED;
+
+    pThread->m_internal->SetState(STATE_EXITED);
+    pThread->m_critsect.Leave();
+
     pThread->OnExit();
 
-    delete pThread;
-    m_pThread = NULL;
+    // if the thread was cancelled (from Delete()), then it the handle is still
+    // needed there
+    if (pThread->IsDetached() && !bWasCancelled)
+    {
+        // auto delete
+        delete pThread;
+    }
+    //else: the joinable threads handle will be closed when Wait() is done
     return dwRet;
 }
 
-bool wxThreadInternal::Create(
-  wxThread*                         pThread
+void wxThreadInternal::SetPriority(
+  unsigned int                      nPriority
 )
 {
-    APIRET                          ulrc;
-
-    ulrc = ::DosCreateThread( &m_hThread
-                             ,(PFNTHREAD)wxThreadInternal::OS2ThreadStart
-                             ,(ULONG)pThread
-                             ,CREATE_SUSPENDED | STACK_SPARSE
-                             ,8192L
-                            );
-    if(ulrc != 0)
-    {
-        wxLogSysError(_("Can't create thread"));
-
-        return FALSE;
-    }
-
     // translate wxWindows priority to the PM one
     ULONG                           ulOS2_Priority;
+    ULONG                           ulrc;
+
+    m_nPriority = nPriority;
 
     if (m_nPriority <= 20)
         ulOS2_Priority = PRTYC_NOCHANGE;
@@ -350,7 +408,31 @@ bool wxThreadInternal::Create(
     {
         wxLogSysError(_("Can't set thread priority"));
     }
-    return TRUE;
+}
+
+bool wxThreadInternal::Create(
+  wxThread*                         pThread
+)
+{
+    APIRET                          ulrc;
+
+    ulrc = ::DosCreateThread( &m_hThread
+                             ,(PFNTHREAD)wxThreadInternal::OS2ThreadStart
+                             ,(ULONG)pThread
+                             ,CREATE_SUSPENDED | STACK_SPARSE
+                             ,8192L
+                            );
+    if(ulrc != 0)
+    {
+        wxLogSysError(_("Can't create thread"));
+
+        return FALSE;
+    }
+    if (m_nPriority != WXTHREAD_DEFAULT_PRIORITY)
+    {
+        SetPriority(m_nPriority);
+    }
+    return(TRUE);
 }
 
 bool wxThreadInternal::Suspend()
@@ -416,12 +498,27 @@ void wxThread::Sleep(
     ::DosSleep(ulMilliseconds);
 }
 
+// ctor and dtor
+// -------------
+
+wxThread::wxThread(wxThreadKind kind)
+{
+    m_internal = new wxThreadInternal();
+
+    m_isDetached = kind == wxTHREAD_DETACHED;
+}
+
+wxThread::~wxThread()
+{
+    delete m_internal;
+}
+
 // create/start thread
 // -------------------
 
 wxThreadError wxThread::Create()
 {
-    if ( !p_internal->Create(this) )
+    if ( !m_internal->Create(this) )
         return wxTHREAD_NO_RESOURCE;
 
     return wxTHREAD_NO_ERROR;
@@ -431,7 +528,7 @@ wxThreadError wxThread::Run()
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
-    if ( p_internal->GetState() != STATE_NEW )
+    if ( m_internal->GetState() != STATE_NEW )
     {
         // actually, it may be almost any state at all, not only STATE_RUNNING
         return wxTHREAD_RUNNING;
@@ -446,102 +543,94 @@ wxThreadError wxThread::Pause()
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
-    return p_internal->Suspend() ? wxTHREAD_NO_ERROR : wxTHREAD_MISC_ERROR;
+    return m_internal->Suspend() ? wxTHREAD_NO_ERROR : wxTHREAD_MISC_ERROR;
 }
 
 wxThreadError wxThread::Resume()
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
-    return p_internal->Resume() ? wxTHREAD_NO_ERROR : wxTHREAD_MISC_ERROR;
+    return m_internal->Resume() ? wxTHREAD_NO_ERROR : wxTHREAD_MISC_ERROR;
 }
 
 // stopping thread
 // ---------------
 
-wxThread::ExitCode wxThread::Delete()
+wxThread::ExitCode wxThread::Wait()
 {
-    ExitCode                        rc = 0;
-    ULONG                           ulrc;
+    // although under Windows we can wait for any thread, it's an error to
+    // wait for a detached one in wxWin API
+    wxCHECK_MSG( !IsDetached(), (ExitCode)-1,
+                 _T("can't wait for detached thread") );
+    ExitCode rc = (ExitCode)-1;
+    (void)Delete(&rc);
+    m_internal->Free();
+    return(rc);
+}
+
+wxThreadError wxThread::Delete(ExitCode *pRc)
+{
+    ExitCode rc = 0;
 
     // Delete() is always safe to call, so consider all possible states
     if (IsPaused())
         Resume();
 
+    TID                             hThread = m_internal->GetHandle();
+
     if (IsRunning())
     {
         if (IsMain())
         {
             // set flag for wxIsWaitingForThread()
-            s_bWaitingForThread = TRUE;
+            gs_bWaitingForThread = TRUE;
+
+#if wxUSE_GUI
             wxBeginBusyCursor();
+#endif // wxUSE_GUI
         }
 
-        TID                         hThread;
-
+        // ask the thread to terminate
         {
-            wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
-
-            p_internal->Cancel();
-            hThread = p_internal->GetHandle();
+            wxCriticalSectionLocker lock(m_critsect);
+            m_internal->Cancel();
         }
 
-        // 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
+#if wxUSE_GUI
+        // need a way to finish GUI processing before killing the thread
+        // until then we just exit
 
-        do
+        if ((gs_nWaitingForGui > 0) && wxGuiOwnedByMainThread())
         {
-            ulrc = ::DosWaitThread( &hThread
-                                   ,DCWW_NOWAIT
-                                  );
-            switch (ulrc)
-            {
-                case ERROR_INTERRUPT:
-                case ERROR_INVALID_THREADID:
-                    // error
-                    wxLogSysError(_("Can not wait for thread termination"));
-                    Kill();
-                    return (ExitCode)-1;
-
-                case 0:
-                    // thread we're waiting for terminated
-                    break;
-
-                case ERROR_THREAD_NOT_TERMINATED:
-                    // new message arrived, process it
-                    if (!wxTheApp->DoMessage())
-                    {
-                        // WM_QUIT received: kill the thread
-                        Kill();
-                        return (ExitCode)-1;
-                    }
-                    if (IsMain())
-                    {
-                        // give the thread we're waiting for chance to exit
-                        // from the GUI call it might have been in
-                        if ((s_nWaitingForGui > 0) && wxGuiOwnedByMainThread())
-                        {
-                            wxMutexGuiLeave();
-                        }
-                    }
-                    break;
-
-                default:
-                    wxFAIL_MSG(wxT("unexpected result of DosWatiThread"));
-            }
-        } while (ulrc != 0);
+            wxMutexGuiLeave();
+        }
+#else // !wxUSE_GUI
 
-        if (IsMain())
+        // can't wait for yourself to end under OS/2 so just quit
+
+#endif // wxUSE_GUI/!wxUSE_GUI
+
+        if ( IsMain() )
         {
-            s_bWaitingForThread = FALSE;
+            gs_bWaitingForThread = FALSE;
+
+#if wxUSE_GUI
             wxEndBusyCursor();
+#endif // wxUSE_GUI
         }
+    }
 
-        ::DosExit(EXIT_THREAD, ulrc);
+    ::DosExit(0, 0);
+    // probably won't get this far, but
+    if (IsDetached())
+    {
+        delete this;
     }
-    rc = (ExitCode)ulrc;
-    return rc;
+
+    if ( pRc )
+        *pRc = rc;
+
+    return rc == (ExitCode)-1 ? wxTHREAD_MISC_ERROR : wxTHREAD_NO_ERROR;
 }
 
 wxThreadError wxThread::Kill()
@@ -549,15 +638,20 @@ wxThreadError wxThread::Kill()
     if (!IsRunning())
         return wxTHREAD_NOT_RUNNING;
 
-    ::DosKillThread(p_internal->GetHandle());
-    delete this;
+    ::DosKillThread(m_internal->GetHandle());
+    m_internal->Free();
+    if (IsDetached())
+    {
+        delete this;
+    }
     return wxTHREAD_NO_ERROR;
 }
 
 void wxThread::Exit(
-  void*                             pStatus
+  ExitCode                          pStatus
 )
 {
+    m_internal->Free();
     delete this;
     ::DosExit(EXIT_THREAD, ULONG(pStatus));
     wxFAIL_MSG(wxT("Couldn't return from DosExit()!"));
@@ -569,60 +663,50 @@ void wxThread::SetPriority(
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
-    p_internal->SetPriority(nPrio);
+    m_internal->SetPriority(nPrio);
 }
 
 unsigned int wxThread::GetPriority() const
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
-    return p_internal->GetPriority();
+    return m_internal->GetPriority();
 }
 
-unsigned long wxThread::GetID() const
+unsigned long wxThread::GetId() const
 {
-    wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
+    wxCriticalSectionLocker lock((wxCriticalSection &)m_critsect); // const_cast
 
-    return (unsigned long)p_internal->GetId();
+    return (unsigned long)m_internal->GetId();
 }
 
 bool wxThread::IsRunning() const
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
-    return p_internal->GetState() == STATE_RUNNING;
+    return(m_internal->GetState() == STATE_RUNNING);
 }
 
 bool wxThread::IsAlive() const
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
-    return (p_internal->GetState() == STATE_RUNNING) ||
-           (p_internal->GetState() == STATE_PAUSED);
+    return (m_internal->GetState() == STATE_RUNNING) ||
+           (m_internal->GetState() == STATE_PAUSED);
 }
 
 bool wxThread::IsPaused() const
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
-    return (p_internal->GetState() == STATE_PAUSED);
+    return (m_internal->GetState() == STATE_PAUSED);
 }
 
 bool wxThread::TestDestroy()
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
-    return p_internal->GetState() == STATE_CANCELED;
-}
-
-wxThread::wxThread()
-{
-    p_internal = new wxThreadInternal();
-}
-
-wxThread::~wxThread()
-{
-    delete p_internal;
+    return m_internal->GetState() == STATE_CANCELED;
 }
 
 // ----------------------------------------------------------------------------
@@ -643,10 +727,10 @@ IMPLEMENT_DYNAMIC_CLASS(wxThreadModule, wxModule)
 
 bool wxThreadModule::OnInit()
 {
-    s_pCritsectWaitingForGui = new wxCriticalSection();
+    gs_pCritsectWaitingForGui = new wxCriticalSection();
 
-    s_pCritsectGui = new wxCriticalSection();
-    s_pCritsectGui->Enter();
+    gs_pCritsectGui = new wxCriticalSection();
+    gs_pCritsectGui->Enter();
 
     PTIB                            ptib;
     PPIB                            ppib;
@@ -659,14 +743,18 @@ bool wxThreadModule::OnInit()
 
 void wxThreadModule::OnExit()
 {
-    if (s_pCritsectGui)
+    if (gs_pCritsectGui)
     {
-        s_pCritsectGui->Leave();
-        delete s_pCritsectGui;
-        s_pCritsectGui = NULL;
+        gs_pCritsectGui->Leave();
+#if (!(defined(__VISAGECPP__) && (__IBMCPP__ < 400 || __IBMC__ < 400 )))
+        delete gs_pCritsectGui;
+#endif
+        gs_pCritsectGui = NULL;
     }
 
-    wxDELETE(s_pCritsectWaitingForGui);
+#if (!(defined(__VISAGECPP__) && (__IBMCPP__ < 400 || __IBMC__ < 400 )))
+    wxDELETE(gs_pCritsectWaitingForGui);
+#endif
 }
 
 // ----------------------------------------------------------------------------
@@ -680,24 +768,24 @@ void WXDLLEXPORT wxWakeUpMainThread()
 
 void WXDLLEXPORT wxMutexGuiLeave()
 {
-    wxCriticalSectionLocker enter(*s_pCritsectWaitingForGui);
+    wxCriticalSectionLocker enter(*gs_pCritsectWaitingForGui);
 
     if ( wxThread::IsMain() )
     {
-        s_bGuiOwnedByMainThread = FALSE;
+        gs_bGuiOwnedByMainThread = FALSE;
     }
     else
     {
         // decrement the number of waiters now
-        wxASSERT_MSG( s_nWaitingForGui > 0,
+        wxASSERT_MSG(gs_nWaitingForGui > 0,
                       wxT("calling wxMutexGuiLeave() without entering it first?") );
 
-        s_nWaitingForGui--;
+        gs_nWaitingForGui--;
 
         wxWakeUpMainThread();
     }
 
-    s_pCritsectGui->Leave();
+    gs_pCritsectGui->Leave();
 }
 
 void WXDLLEXPORT wxMutexGuiLeaveOrEnter()
@@ -705,17 +793,17 @@ void WXDLLEXPORT wxMutexGuiLeaveOrEnter()
     wxASSERT_MSG( wxThread::IsMain(),
                   wxT("only main thread may call wxMutexGuiLeaveOrEnter()!") );
 
-    wxCriticalSectionLocker enter(*s_pCritsectWaitingForGui);
+    wxCriticalSectionLocker enter(*gs_pCritsectWaitingForGui);
 
-    if ( s_nWaitingForGui == 0 )
+    if (gs_nWaitingForGui == 0)
     {
         // no threads are waiting for GUI - so we may acquire the lock without
         // any danger (but only if we don't already have it)
         if (!wxGuiOwnedByMainThread())
         {
-            s_pCritsectGui->Enter();
+            gs_pCritsectGui->Enter();
 
-            s_bGuiOwnedByMainThread = TRUE;
+            gs_bGuiOwnedByMainThread = TRUE;
         }
         //else: already have it, nothing to do
     }
@@ -732,12 +820,12 @@ void WXDLLEXPORT wxMutexGuiLeaveOrEnter()
 
 bool WXDLLEXPORT wxGuiOwnedByMainThread()
 {
-    return s_bGuiOwnedByMainThread;
+    return gs_bGuiOwnedByMainThread;
 }
 
 bool WXDLLEXPORT wxIsWaitingForThread()
 {
-    return s_bWaitingForThread;
+    return gs_bWaitingForThread;
 }
 
 #endif