Defer SetHorizontalExtent to idle, also fixes (wxListBox::Delete ignores Freeze/Thaw...

[wxWidgets.git] / src / msw / thread.cpp

diff --git a/src/msw/thread.cpp b/src/msw/thread.cpp
index 976c7412d683b887b2f9c33adde2282502275ad5..301144ac1445c8c39d1c7bd7b9ea2fd0d68495e9 100644 (file)
--- a/src/msw/thread.cpp
+++ b/src/msw/thread.cpp
@@ -10,10 +10,6 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 

-#ifdef __GNUG__
-    #pragma implementation "thread.h"
-#endif
-

 // ----------------------------------------------------------------------------
 // headers
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // headers
 // ----------------------------------------------------------------------------


@@ -25,20 +21,24 @@
     #pragma hdrstop
 #endif
 
     #pragma hdrstop
 #endif
 

+#if wxUSE_THREADS
+
+#include "wx/thread.h"
+

 #ifndef WX_PRECOMP
     #include "wx/intl.h"
     #include "wx/app.h"
 #ifndef WX_PRECOMP
     #include "wx/intl.h"
     #include "wx/app.h"

+    #include "wx/module.h"

 #endif
 
 #endif
 

-#if wxUSE_THREADS
-

 #include "wx/apptrait.h"
 #include "wx/apptrait.h"

+#include "wx/scopeguard.h"

 
 #include "wx/msw/private.h"
 #include "wx/msw/missing.h"
 
 #include "wx/msw/private.h"
 #include "wx/msw/missing.h"

+#include "wx/msw/seh.h"

 
 

-#include "wx/module.h"
-#include "wx/thread.h"
+#include "wx/except.h"

 
 // must have this symbol defined to get _beginthread/_endthread declarations
 #ifndef _MT
 
 // must have this symbol defined to get _beginthread/_endthread declarations
 #ifndef _MT


@@ -76,7 +76,7 @@
     #include <process.h>
 
     // the return type of the thread function entry point
     #include <process.h>
 
     // the return type of the thread function entry point

-    typedef unsigned THREAD_RETVAL;
+    typedef wxUIntPtr THREAD_RETVAL;

 
     // the calling convention of the thread function entry point
     #define THREAD_CALLCONV __stdcall
 
     // the calling convention of the thread function entry point
     #define THREAD_CALLCONV __stdcall


@@ -86,6 +86,8 @@
     #define THREAD_CALLCONV WINAPI
 #endif
 
     #define THREAD_CALLCONV WINAPI
 #endif
 

+static const THREAD_RETVAL THREAD_ERROR_EXIT = (THREAD_RETVAL)-1;
+

 // ----------------------------------------------------------------------------
 // constants
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // constants
 // ----------------------------------------------------------------------------


@@ -112,8 +114,8 @@ static DWORD gs_tlsThisThread = 0xFFFFFFFF;
 // calling wxMutexGuiEnter()
 static DWORD gs_idMainThread = 0;
 
 // calling wxMutexGuiEnter()
 static DWORD gs_idMainThread = 0;
 

-// if it's FALSE, some secondary thread is holding the GUI lock
-static bool gs_bGuiOwnedByMainThread = TRUE;
+// if it's false, some secondary thread is holding the GUI lock
+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
 
 // 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


@@ -123,11 +125,16 @@ static wxCriticalSection *gs_critsectGui = NULL;
 // critical section which protects gs_nWaitingForGui variable
 static wxCriticalSection *gs_critsectWaitingForGui = NULL;
 
 // critical section which protects gs_nWaitingForGui variable
 static wxCriticalSection *gs_critsectWaitingForGui = NULL;
 

+// critical section which serializes WinThreadStart() and WaitForTerminate()
+// (this is a potential bottleneck, we use a single crit sect for all threads
+// in the system, but normally time spent inside it should be quite short)
+static wxCriticalSection *gs_critsectThreadDelete = NULL;
+

 // number of threads waiting for GUI in wxMutexGuiEnter()
 static size_t gs_nWaitingForGui = 0;
 
 // are we waiting for a thread termination?
 // number of threads waiting for GUI in wxMutexGuiEnter()
 static size_t gs_nWaitingForGui = 0;
 
 // are we waiting for a thread termination?

-static bool gs_waitingForThread = FALSE;
+static bool gs_waitingForThread = false;

 
 // ============================================================================
 // Windows implementation of thread and related classes
 
 // ============================================================================
 // Windows implementation of thread and related classes


@@ -173,7 +180,8 @@ public:
     bool IsOk() const { return m_mutex != NULL; }
 
     wxMutexError Lock() { return LockTimeout(INFINITE); }
     bool IsOk() const { return m_mutex != NULL; }
 
     wxMutexError Lock() { return LockTimeout(INFINITE); }

-    wxMutexError TryLock() { return LockTimeout(0); }
+    wxMutexError Lock(unsigned long ms) { return LockTimeout(ms); }
+    wxMutexError TryLock();

     wxMutexError Unlock();
 
 private:
     wxMutexError Unlock();
 
 private:


@@ -212,6 +220,14 @@ wxMutexInternal::~wxMutexInternal()
     }
 }
 
     }
 }
 

+wxMutexError wxMutexInternal::TryLock()
+{
+    const wxMutexError rc = LockTimeout(0);
+
+    // we have a special return code for timeout in this case
+    return rc == wxMUTEX_TIMEOUT ? wxMUTEX_BUSY : rc;
+}
+

 wxMutexError wxMutexInternal::LockTimeout(DWORD milliseconds)
 {
     DWORD rc = ::WaitForSingleObject(m_mutex, milliseconds);
 wxMutexError wxMutexInternal::LockTimeout(DWORD milliseconds)
 {
     DWORD rc = ::WaitForSingleObject(m_mutex, milliseconds);


@@ -232,7 +248,7 @@ wxMutexError wxMutexInternal::LockTimeout(DWORD milliseconds)
             break;
 
         case WAIT_TIMEOUT:
             break;
 
         case WAIT_TIMEOUT:

-            return wxMUTEX_BUSY;
+            return wxMUTEX_TIMEOUT;

 
         case WAIT_ABANDONED:        // checked for above
         default:
 
         case WAIT_ABANDONED:        // checked for above
         default:


@@ -295,7 +311,7 @@ private:
 
 wxSemaphoreInternal::wxSemaphoreInternal(int initialcount, int maxcount)
 {
 
 wxSemaphoreInternal::wxSemaphoreInternal(int initialcount, int maxcount)
 {

-#ifndef __WXWINCE__
+#if !defined(_WIN32_WCE) || (_WIN32_WCE >= 300)

     if ( maxcount == 0 )
     {
         // make it practically infinite
     if ( maxcount == 0 )
     {
         // make it practically infinite


@@ -348,151 +364,24 @@ wxSemaError wxSemaphoreInternal::WaitTimeout(unsigned long milliseconds)
 
 wxSemaError wxSemaphoreInternal::Post()
 {
 
 wxSemaError wxSemaphoreInternal::Post()
 {

-#ifndef __WXWINCE__
+#if !defined(_WIN32_WCE) || (_WIN32_WCE >= 300)

     if ( !::ReleaseSemaphore(m_semaphore, 1, NULL /* ptr to previous count */) )
     if ( !::ReleaseSemaphore(m_semaphore, 1, NULL /* ptr to previous count */) )

-#endif
-    {
-        wxLogLastError(_T("ReleaseSemaphore"));
-
-        return wxSEMA_MISC_ERROR;
-    }
-
-    return wxSEMA_NO_ERROR;
-}
-
-// --------------------------------------------------------------------------
-// wxCondition
-// --------------------------------------------------------------------------
-
-// Win32 doesn't have explicit support for the POSIX condition variables and
-// the Win32 events have quite different semantics, so we reimplement the
-// conditions from scratch using the mutexes and semaphores
-class wxConditionInternal
-{
-public:
-    wxConditionInternal(wxMutex& mutex);
-
-    bool IsOk() const { return m_mutex.IsOk() && m_semaphore.IsOk(); }
-
-    wxCondError Wait();
-    wxCondError WaitTimeout(unsigned long milliseconds);
-
-    wxCondError Signal();
-    wxCondError Broadcast();
-
-private:
-    // the number of threads currently waiting for this condition
-    LONG m_numWaiters;
-
-    // the critical section protecting m_numWaiters
-    wxCriticalSection m_csWaiters;
-
-    wxMutex& m_mutex;
-    wxSemaphore m_semaphore;
-};
-
-wxConditionInternal::wxConditionInternal(wxMutex& mutex)
-                   : m_mutex(mutex)
-{
-    // another thread can't access it until we return from ctor, so no need to
-    // protect access to m_numWaiters here
-    m_numWaiters = 0;
-}
-
-wxCondError wxConditionInternal::Wait()
-{
-    // increment the number of waiters
-    ::InterlockedIncrement(&m_numWaiters);
-
-    m_mutex.Unlock();
-
-    // a potential race condition can occur here
-    //
-    // after a thread increments nwaiters, and unlocks the mutex and before the
-    // semaphore.Wait() is called, if another thread can cause a signal to be
-    // generated
-    //
-    // this race condition is handled by using a semaphore and incrementing the
-    // semaphore only if 'nwaiters' is greater that zero since the semaphore,
-    // can 'remember' signals the race condition will not occur
-
-    // wait ( if necessary ) and decrement semaphore
-    wxSemaError err = m_semaphore.Wait();
-    m_mutex.Lock();
-
-    return err == wxSEMA_NO_ERROR ? wxCOND_NO_ERROR : wxCOND_MISC_ERROR;
-}
-
-wxCondError wxConditionInternal::WaitTimeout(unsigned long milliseconds)
-{
-    ::InterlockedIncrement(&m_numWaiters);
-
-    m_mutex.Unlock();
-
-    // a race condition can occur at this point in the code
-    //
-    // please see the comments in Wait(), for details
-
-    wxSemaError err = m_semaphore.WaitTimeout(milliseconds);
-
-    if ( err == wxSEMA_BUSY )

     {
     {

-        // another potential race condition exists here it is caused when a
-        // 'waiting' thread timesout, and returns from WaitForSingleObject, but
-        // has not yet decremented 'nwaiters'.
-        //
-        // at this point if another thread calls signal() then the semaphore
-        // will be incremented, but the waiting thread will miss it.
-        //
-        // to handle this particular case, the waiting thread calls
-        // WaitForSingleObject again with a timeout of 0, after locking
-        // 'nwaiters_mutex'. this call does not block because of the zero
-        // timeout, but will allow the waiting thread to catch the missed
-        // signals.
-        wxCriticalSectionLocker lock(m_csWaiters);
-
-        err = m_semaphore.WaitTimeout(0);
-
-        if ( err != wxSEMA_NO_ERROR )
+        if ( GetLastError() == ERROR_TOO_MANY_POSTS )

         {
         {

-            m_numWaiters--;
+            return wxSEMA_OVERFLOW;
+        }
+        else
+        {
+            wxLogLastError(_T("ReleaseSemaphore"));
+            return wxSEMA_MISC_ERROR;

         }
     }
 
         }
     }
 

-    m_mutex.Lock();
-
-    return err == wxSEMA_NO_ERROR ? wxCOND_NO_ERROR : wxCOND_MISC_ERROR;
-}
-
-wxCondError wxConditionInternal::Signal()
-{
-    wxCriticalSectionLocker lock(m_csWaiters);
-
-    if ( m_numWaiters > 0 )
-    {
-        // increment the semaphore by 1
-        if ( m_semaphore.Post() != wxSEMA_NO_ERROR )
-            return wxCOND_MISC_ERROR;
-
-        m_numWaiters--;
-    }
-
-    return wxCOND_NO_ERROR;
-}
-
-wxCondError wxConditionInternal::Broadcast()
-{
-    wxCriticalSectionLocker lock(m_csWaiters);
-
-    while ( m_numWaiters > 0 )
-    {
-        if ( m_semaphore.Post() != wxSEMA_NO_ERROR )
-            return wxCOND_MISC_ERROR;
-
-        m_numWaiters--;
-    }
-
-    return wxCOND_NO_ERROR;
+    return wxSEMA_NO_ERROR;
+#else
+    return wxSEMA_MISC_ERROR;
+#endif

 }
 
 // ----------------------------------------------------------------------------
 }
 
 // ----------------------------------------------------------------------------


@@ -505,11 +394,13 @@ wxCondError wxConditionInternal::Broadcast()
 class wxThreadInternal
 {
 public:
 class wxThreadInternal
 {
 public:

-    wxThreadInternal()
+    wxThreadInternal(wxThread *thread)

     {
     {

+        m_thread = thread;

         m_hThread = 0;
         m_state = STATE_NEW;
         m_priority = WXTHREAD_DEFAULT_PRIORITY;
         m_hThread = 0;
         m_state = STATE_NEW;
         m_priority = WXTHREAD_DEFAULT_PRIORITY;

+        m_nRef = 1;

     }
 
     ~wxThreadInternal()
     }
 
     ~wxThreadInternal()


@@ -535,9 +426,9 @@ public:
 
     // wait for the thread to terminate, either by itself, or by asking it
     // (politely, this is not Kill()!) to do it
 
     // wait for the thread to terminate, either by itself, or by asking it
     // (politely, this is not Kill()!) to do it

-    wxThreadError WaitForTerminate(bool shouldCancel,
-                                   wxCriticalSection& cs,
-                                   wxThread::ExitCode *pRc);
+    wxThreadError WaitForTerminate(wxCriticalSection& cs,
+                                   wxThread::ExitCode *pRc,
+                                   wxThread *threadToDelete = NULL);

 
     // kill the thread unconditionally
     wxThreadError Kill();
 
     // kill the thread unconditionally
     wxThreadError Kill();


@@ -559,60 +450,133 @@ public:
     HANDLE GetHandle() const { return m_hThread; }
     DWORD  GetId() const { return m_tid; }
 
     HANDLE GetHandle() const { return m_hThread; }
     DWORD  GetId() const { return m_tid; }
 

-    // thread function
+    // the thread function forwarding to DoThreadStart

     static THREAD_RETVAL THREAD_CALLCONV WinThreadStart(void *thread);
 
     static THREAD_RETVAL THREAD_CALLCONV WinThreadStart(void *thread);
 

+    // really start the thread (if it's not already dead)
+    static THREAD_RETVAL DoThreadStart(wxThread *thread);
+
+    // call OnExit() on the thread
+    static void DoThreadOnExit(wxThread *thread);
+
+
+    void KeepAlive()
+    {
+        if ( m_thread->IsDetached() )
+            ::InterlockedIncrement(&m_nRef);
+    }
+
+    void LetDie()
+    {
+        if ( m_thread->IsDetached() && !::InterlockedDecrement(&m_nRef) )
+            delete m_thread;
+    }
+

 private:
 private:

+    // the thread we're associated with
+    wxThread *m_thread;
+

     HANDLE        m_hThread;    // handle of the thread
     wxThreadState m_state;      // state, see wxThreadState enum
     unsigned int  m_priority;   // thread priority in "wx" units
     DWORD         m_tid;        // thread id
 
     HANDLE        m_hThread;    // handle of the thread
     wxThreadState m_state;      // state, see wxThreadState enum
     unsigned int  m_priority;   // thread priority in "wx" units
     DWORD         m_tid;        // thread id
 

+    // number of threads which need this thread to remain alive, when the count
+    // reaches 0 we kill the owning wxThread -- and die ourselves with it
+    LONG m_nRef;
+

     DECLARE_NO_COPY_CLASS(wxThreadInternal)
 };
 
     DECLARE_NO_COPY_CLASS(wxThreadInternal)
 };
 

-THREAD_RETVAL THREAD_CALLCONV wxThreadInternal::WinThreadStart(void *param)
+// small class which keeps a thread alive during its lifetime
+class wxThreadKeepAlive

 {
 {

-    THREAD_RETVAL rc;
-    bool wasCancelled;
+public:
+    wxThreadKeepAlive(wxThreadInternal& thrImpl) : m_thrImpl(thrImpl)
+        { m_thrImpl.KeepAlive(); }
+    ~wxThreadKeepAlive()
+        { m_thrImpl.LetDie(); }

 
 

-    // first of all, check whether we hadn't been cancelled already and don't
-    // start the user code at all then
-    wxThread *thread = (wxThread *)param;
-    if ( thread->m_internal->GetState() == STATE_EXITED )
+private:
+    wxThreadInternal& m_thrImpl;
+};
+
+/* static */
+void wxThreadInternal::DoThreadOnExit(wxThread *thread)
+{
+    wxTRY

     {
     {

-        rc = (THREAD_RETVAL)-1;
-        wasCancelled = TRUE;
+        thread->OnExit();

     }
     }

-    else // do run thread
+    wxCATCH_ALL( wxTheApp->OnUnhandledException(); )
+}
+
+/* static */
+THREAD_RETVAL wxThreadInternal::DoThreadStart(wxThread *thread)
+{
+    wxON_BLOCK_EXIT1(DoThreadOnExit, thread);
+
+    THREAD_RETVAL rc = THREAD_ERROR_EXIT;
+
+    wxTRY

     {
         // store the thread object in the TLS
         if ( !::TlsSetValue(gs_tlsThisThread, thread) )
         {
             wxLogSysError(_("Can not start thread: error writing TLS."));
 
     {
         // store the thread object in the TLS
         if ( !::TlsSetValue(gs_tlsThisThread, thread) )
         {
             wxLogSysError(_("Can not start thread: error writing TLS."));
 

-            return (DWORD)-1;
+            return THREAD_ERROR_EXIT;

         }
 
         rc = (THREAD_RETVAL)thread->Entry();
         }
 
         rc = (THREAD_RETVAL)thread->Entry();

+    }
+    wxCATCH_ALL( wxTheApp->OnUnhandledException(); )

 
 

+    return rc;
+}
+
+/* static */
+THREAD_RETVAL THREAD_CALLCONV wxThreadInternal::WinThreadStart(void *param)
+{
+    THREAD_RETVAL rc = THREAD_ERROR_EXIT;
+
+    wxThread * const thread = (wxThread *)param;
+
+    // each thread has its own SEH translator so install our own a.s.a.p.
+    DisableAutomaticSETranslator();
+
+    // first of all, check whether we hadn't been cancelled already and don't
+    // start the user code at all then
+    const bool hasExited = thread->m_internal->GetState() == STATE_EXITED;
+
+    // run the thread function itself inside a SEH try/except block
+    wxSEH_TRY
+    {
+        if ( hasExited )
+            DoThreadOnExit(thread);
+        else
+            rc = DoThreadStart(thread);
+    }
+    wxSEH_HANDLE(THREAD_ERROR_EXIT)
+
+
+    // save IsDetached because thread object can be deleted by joinable
+    // threads after state is changed to STATE_EXITED.
+    const bool isDetached = thread->IsDetached();
+    if ( !hasExited )
+    {

         // enter m_critsect before changing the thread state
         // enter m_critsect before changing the thread state

+        //
+        // NB: can't use wxCriticalSectionLocker here as we use SEH and it's
+        //     incompatible with C++ object dtors

         thread->m_critsect.Enter();
         thread->m_critsect.Enter();

-        wasCancelled = thread->m_internal->GetState() == STATE_CANCELED;

         thread->m_internal->SetState(STATE_EXITED);
         thread->m_critsect.Leave();
     }
 
         thread->m_internal->SetState(STATE_EXITED);
         thread->m_critsect.Leave();
     }
 

-    thread->OnExit();
-
-    // if the thread was cancelled (from Delete()), then its handle is still
-    // needed there
-    if ( thread->IsDetached() && !wasCancelled )
-    {
-        // auto delete
-        delete thread;
-    }
-    //else: the joinable threads handle will be closed when Wait() is done
+    // the thread may delete itself now if it wants, we don't need it any more
+    if ( isDetached )
+        thread->m_internal->LetDie();

 
     return rc;
 }
 
     return rc;
 }


@@ -621,7 +585,7 @@ void wxThreadInternal::SetPriority(unsigned int priority)
 {
     m_priority = priority;
 
 {
     m_priority = priority;
 

-    // translate wxWindows priority to the Windows one
+    // translate wxWidgets priority to the Windows one

     int win_priority;
     if (m_priority <= 20)
         win_priority = THREAD_PRIORITY_LOWEST;
     int win_priority;
     if (m_priority <= 20)
         win_priority = THREAD_PRIORITY_LOWEST;


@@ -687,7 +651,7 @@ bool wxThreadInternal::Create(wxThread *thread, unsigned int stackSize)
     {
         wxLogSysError(_("Can't create thread"));
 
     {
         wxLogSysError(_("Can't create thread"));
 

-        return FALSE;
+        return false;

     }
 
     if ( m_priority != WXTHREAD_DEFAULT_PRIORITY )
     }
 
     if ( m_priority != WXTHREAD_DEFAULT_PRIORITY )


@@ -695,12 +659,12 @@ bool wxThreadInternal::Create(wxThread *thread, unsigned int stackSize)
         SetPriority(m_priority);
     }
 
         SetPriority(m_priority);
     }
 

-    return TRUE;
+    return true;

 }
 
 wxThreadError wxThreadInternal::Kill()
 {
 }
 
 wxThreadError wxThreadInternal::Kill()
 {

-    if ( !::TerminateThread(m_hThread, (DWORD)-1) )
+    if ( !::TerminateThread(m_hThread, THREAD_ERROR_EXIT) )

     {
         wxLogSysError(_("Couldn't terminate thread"));
 
     {
         wxLogSysError(_("Couldn't terminate thread"));
 


@@ -713,42 +677,49 @@ wxThreadError wxThreadInternal::Kill()
 }
 
 wxThreadError
 }
 
 wxThreadError

-wxThreadInternal::WaitForTerminate(bool shouldCancel,
-                                   wxCriticalSection& cs,
-                                   wxThread::ExitCode *pRc)
+wxThreadInternal::WaitForTerminate(wxCriticalSection& cs,
+                                   wxThread::ExitCode *pRc,
+                                   wxThread *threadToDelete)

 {
 {

-    wxThread::ExitCode rc = 0;
+    // prevent the thread C++ object from disappearing as long as we are using
+    // it here
+    wxThreadKeepAlive keepAlive(*this);
+
+
+    // we may either wait passively for the thread to terminate (when called
+    // from Wait()) or ask it to terminate (when called from Delete())
+    bool shouldDelete = threadToDelete != NULL;

 
 

-    // Delete() is always safe to call, so consider all possible states
+    DWORD rc = 0;

 
 

-    // 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,
-         isRunning = FALSE;
+    // we might need to resume the thread if it's currently stopped
+    bool shouldResume = false;

 
 

-    // check if the thread already started to run
+    // as Delete() (which calls us) is always safe to call we need to consider
+    // all possible states

     {
         wxCriticalSectionLocker lock(cs);
 
         if ( m_state == STATE_NEW )
         {
     {
         wxCriticalSectionLocker lock(cs);
 
         if ( m_state == STATE_NEW )
         {

-            if ( shouldCancel )
+            if ( shouldDelete )

             {
             {

-                // WinThreadStart() will see it and terminate immediately, no need
-                // to cancel the thread - but we still need to resume it to let it
-                // run
+                // 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_state = STATE_EXITED;
 
                 m_state = STATE_EXITED;
 

-                Resume();   // it knows about STATE_EXITED special case
-
-                shouldCancel = FALSE;
+                // we must call Resume() as the thread hasn't been initially
+                // resumed yet (and as Resume() it knows about STATE_EXITED
+                // special case, it won't touch it and WinThreadStart() will
+                // just exit immediately)
+                shouldResume = true;
+                shouldDelete = false;

             }
             }

-
-            isRunning = TRUE;
-
-            // shouldResume is correctly set to FALSE here
+            //else: shouldResume is correctly set to false here, wait until
+            //      someone else runs the thread and it finishes

         }
         }

-        else
+        else // running, paused, cancelled or even exited

         {
             shouldResume = m_state == STATE_PAUSED;
         }
         {
             shouldResume = m_state == STATE_PAUSED;
         }


@@ -758,114 +729,125 @@ wxThreadInternal::WaitForTerminate(bool shouldCancel,
     if ( shouldResume )
         Resume();
 
     if ( shouldResume )
         Resume();
 

-    // does is still run?
-    if ( isRunning || m_state == STATE_RUNNING )
+    // ask the thread to terminate
+    if ( shouldDelete )
+    {
+        wxCriticalSectionLocker lock(cs);
+
+        Cancel();
+    }
+
+
+    // now wait for thread to finish
+    if ( wxThread::IsMain() )
+    {
+        // set flag for wxIsWaitingForThread()
+        gs_waitingForThread = true;
+    }
+
+    // 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
+    // (note that even in console applications we might have to process
+    // messages if we use wxExecute() or timers or ...)
+    DWORD result wxDUMMY_INITIALIZE(0);
+    do

     {
         if ( wxThread::IsMain() )
         {
     {
         if ( wxThread::IsMain() )
         {

-            // set flag for wxIsWaitingForThread()
-            gs_waitingForThread = TRUE;
+            // give the thread we're waiting for chance to do the GUI call
+            // it might be in
+            if ( (gs_nWaitingForGui > 0) && wxGuiOwnedByMainThread() )
+            {
+                wxMutexGuiLeave();
+            }

         }
 
         }
 

-        // ask the thread to terminate
-        if ( shouldCancel )
+        wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL;
+        if ( traits )

         {
         {

-            wxCriticalSectionLocker lock(cs);
-
-            Cancel();
+            result = traits->WaitForThread(m_hThread);
+        }
+        else // can't wait for the thread
+        {
+            // so kill it below
+            result = 0xFFFFFFFF;

         }
 
         }
 

-        // 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
-        // (note that even in console applications we might have to process
-        // messages if we use wxExecute() or timers or ...)
-        DWORD result = 0;       // suppress warnings from broken compilers
-        do
+        switch ( result )

         {
         {

-            if ( wxThread::IsMain() )
-            {
-                // give the thread we're waiting for chance to do the GUI call
-                // it might be in
-                if ( (gs_nWaitingForGui > 0) && wxGuiOwnedByMainThread() )
-                {
-                    wxMutexGuiLeave();
-                }
-            }
+            case 0xFFFFFFFF:
+                // error
+                wxLogSysError(_("Can not wait for thread termination"));
+                Kill();
+                return wxTHREAD_KILLED;
+
+            case WAIT_OBJECT_0:
+                // thread we're waiting for terminated
+                break;

 
 

-            result = ::MsgWaitForMultipleObjects
-                     (
-                       1,              // number of objects to wait for
-                       &m_hThread,     // the objects
-                       FALSE,          // don't wait for all objects
-                       INFINITE,       // no timeout
-                       QS_ALLINPUT |   // return as soon as there are any events
-                       QS_ALLPOSTMESSAGE
-                     );
-
-            switch ( result )
-            {
-                case 0xFFFFFFFF:
-                    // error
-                    wxLogSysError(_("Can not wait for thread termination"));
-                    Kill();
-                    return wxTHREAD_KILLED;
-
-                case WAIT_OBJECT_0:
-                    // thread we're waiting for terminated
-                    break;
-
-                case WAIT_OBJECT_0 + 1:
-                    // new message arrived, process it
+            case WAIT_OBJECT_0 + 1:
+                // new message arrived, process it -- but only if we're the
+                // main thread as we don't support processing messages in
+                // the other ones
+                //
+                // NB: we still must include QS_ALLINPUT even when waiting
+                //     in a secondary thread because if it had created some
+                //     window somehow (possible not even using wxWidgets)
+                //     the system might dead lock then
+                if ( wxThread::IsMain() )
+                {
+                    if ( traits && !traits->DoMessageFromThreadWait() )

                     {
                     {

-                        // it looks that sometimes WAIT_OBJECT_0 + 1 is
-                        // returned but there are no messages in the thread
-                        // queue -- prevent DoMessageFromThreadWait() from
-                        // blocking inside ::GetMessage() forever in this case
-                        ::PostMessage(NULL, WM_NULL, 0, 0);
-
-                        wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits()
-                                                       : NULL;
-
-                        if ( traits && !traits->DoMessageFromThreadWait() )
-                        {
-                            // WM_QUIT received: kill the thread
-                            Kill();
-
-                            return wxTHREAD_KILLED;
-                        }
-                    }
-                    break;
+                        // WM_QUIT received: kill the thread
+                        Kill();

 
 

-                default:
-                    wxFAIL_MSG(wxT("unexpected result of MsgWaitForMultipleObject"));
-            }
-        } while ( result != WAIT_OBJECT_0 );
+                        return wxTHREAD_KILLED;
+                    }
+                }
+                break;

 
 

-        if ( wxThread::IsMain() )
-        {
-            gs_waitingForThread = FALSE;
+            default:
+                wxFAIL_MSG(wxT("unexpected result of MsgWaitForMultipleObject"));

         }
         }

+    } while ( result != WAIT_OBJECT_0 );
+
+    if ( wxThread::IsMain() )
+    {
+        gs_waitingForThread = false;

     }
 
     }
 

+

     // 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
     // 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
+    for ( ;; )

     {
     {

-        if ( !::GetExitCodeThread(m_hThread, (LPDWORD)&rc) )
+        if ( !::GetExitCodeThread(m_hThread, &rc) )

         {
             wxLogLastError(wxT("GetExitCodeThread"));
 
         {
             wxLogLastError(wxT("GetExitCodeThread"));
 

-            rc = (wxThread::ExitCode)-1;
+            rc = THREAD_ERROR_EXIT;
+
+            break;

         }
         }

-    } while ( (DWORD)rc == STILL_ACTIVE );
+
+        if ( rc != STILL_ACTIVE )
+            break;
+
+        // give the other thread some time to terminate, otherwise we may be
+        // starving it
+        ::Sleep(1);
+    }

 
     if ( pRc )
 
     if ( pRc )

-        *pRc = rc;
+        *pRc = wxUIntToPtr(rc);
+
+    // we don't need the thread handle any more in any case
+    Free();
+

 
 

-    return rc == (wxThread::ExitCode)-1 ? wxTHREAD_MISC_ERROR
-                                        : wxTHREAD_NO_ERROR;
+    return rc == THREAD_ERROR_EXIT ? wxTHREAD_MISC_ERROR : wxTHREAD_NO_ERROR;

 }
 
 bool wxThreadInternal::Suspend()
 }
 
 bool wxThreadInternal::Suspend()


@@ -875,12 +857,12 @@ bool wxThreadInternal::Suspend()
     {
         wxLogSysError(_("Can not suspend thread %x"), m_hThread);
 
     {
         wxLogSysError(_("Can not suspend thread %x"), m_hThread);
 

-        return FALSE;
+        return false;

     }
 
     m_state = STATE_PAUSED;
 
     }
 
     m_state = STATE_PAUSED;
 

-    return TRUE;
+    return true;

 }
 
 bool wxThreadInternal::Resume()
 }
 
 bool wxThreadInternal::Resume()


@@ -890,18 +872,18 @@ bool wxThreadInternal::Resume()
     {
         wxLogSysError(_("Can not resume thread %x"), m_hThread);
 
     {
         wxLogSysError(_("Can not resume thread %x"), m_hThread);
 

-        return FALSE;
+        return false;

     }
 
     // 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,
     }
 
     // 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
+    // the code in WaitForTerminate() wouldn't work

     if ( m_state != STATE_EXITED )
     {
         m_state = STATE_RUNNING;
     }
 
     if ( m_state != STATE_EXITED )
     {
         m_state = STATE_RUNNING;
     }
 

-    return TRUE;
+    return true;

 }
 
 // static functions
 }
 
 // static functions


@@ -924,13 +906,9 @@ wxThread *wxThread::This()
 
 bool wxThread::IsMain()
 {
 
 bool wxThread::IsMain()
 {

-    return ::GetCurrentThreadId() == gs_idMainThread;
+    return ::GetCurrentThreadId() == gs_idMainThread || gs_idMainThread == 0;

 }
 
 }
 

-#ifdef Yield
-#undef Yield
-#endif
-

 void wxThread::Yield()
 {
     // 0 argument to Sleep() is special and means to just give away the rest of
 void wxThread::Yield()
 {
     // 0 argument to Sleep() is special and means to just give away the rest of


@@ -938,11 +916,6 @@ void wxThread::Yield()
     ::Sleep(0);
 }
 
     ::Sleep(0);
 }
 

-void wxThread::Sleep(unsigned long milliseconds)
-{
-    ::Sleep(milliseconds);
-}
-

 int wxThread::GetCPUCount()
 {
     SYSTEM_INFO si;
 int wxThread::GetCPUCount()
 {
     SYSTEM_INFO si;


@@ -956,9 +929,11 @@ unsigned long wxThread::GetCurrentId()
     return (unsigned long)::GetCurrentThreadId();
 }
 
     return (unsigned long)::GetCurrentThreadId();
 }
 

-bool wxThread::SetConcurrency(size_t level)
+bool wxThread::SetConcurrency(size_t WXUNUSED_IN_WINCE(level))

 {
 {

-#ifndef __WXWINCE__
+#ifdef __WXWINCE__
+    return false;
+#else

     wxASSERT_MSG( IsMain(), _T("should only be called from the main thread") );
 
     // ok only for the default one
     wxASSERT_MSG( IsMain(), _T("should only be called from the main thread") );
 
     // ok only for the default one


@@ -967,12 +942,12 @@ bool wxThread::SetConcurrency(size_t level)
 
     // get system affinity mask first
     HANDLE hProcess = ::GetCurrentProcess();
 
     // get system affinity mask first
     HANDLE hProcess = ::GetCurrentProcess();

-    DWORD dwProcMask, dwSysMask;
+    DWORD_PTR dwProcMask, dwSysMask;

     if ( ::GetProcessAffinityMask(hProcess, &dwProcMask, &dwSysMask) == 0 )
     {
         wxLogLastError(_T("GetProcessAffinityMask"));
 
     if ( ::GetProcessAffinityMask(hProcess, &dwProcMask, &dwSysMask) == 0 )
     {
         wxLogLastError(_T("GetProcessAffinityMask"));
 

-        return FALSE;
+        return false;

     }
 
     // how many CPUs have we got?
     }
 
     // how many CPUs have we got?


@@ -995,7 +970,7 @@ bool wxThread::SetConcurrency(size_t level)
             dwProcMask |= bit;
 
             // another process added
             dwProcMask |= bit;
 
             // another process added

-            if ( !--level )
+            if ( --level == 0 )

             {
                 // and that's enough
                 break;
             {
                 // and that's enough
                 break;


@@ -1011,13 +986,13 @@ bool wxThread::SetConcurrency(size_t level)
     {
         wxLogDebug(_T("bad level %u in wxThread::SetConcurrency()"), level);
 
     {
         wxLogDebug(_T("bad level %u in wxThread::SetConcurrency()"), level);
 

-        return FALSE;
+        return false;

     }
 
     // set it: we can't link to SetProcessAffinityMask() because it doesn't
     // exist in Win9x, use RT binding instead
 
     }
 
     // set it: we can't link to SetProcessAffinityMask() because it doesn't
     // exist in Win9x, use RT binding instead
 

-    typedef BOOL (*SETPROCESSAFFINITYMASK)(HANDLE, DWORD);
+    typedef BOOL (WINAPI *SETPROCESSAFFINITYMASK)(HANDLE, DWORD_PTR);

 
     // can use static var because we're always in the main thread here
     static SETPROCESSAFFINITYMASK pfnSetProcessAffinityMask = NULL;
 
     // can use static var because we're always in the main thread here
     static SETPROCESSAFFINITYMASK pfnSetProcessAffinityMask = NULL;


@@ -1039,17 +1014,18 @@ bool wxThread::SetConcurrency(size_t level)
     if ( !pfnSetProcessAffinityMask )
     {
         // msg given above - do it only once
     if ( !pfnSetProcessAffinityMask )
     {
         // msg given above - do it only once

-        return FALSE;
+        return false;

     }
 
     if ( pfnSetProcessAffinityMask(hProcess, dwProcMask) == 0 )
     {
         wxLogLastError(_T("SetProcessAffinityMask"));
 
     }
 
     if ( pfnSetProcessAffinityMask(hProcess, dwProcMask) == 0 )
     {
         wxLogLastError(_T("SetProcessAffinityMask"));
 

-        return FALSE;
+        return false;

     }
     }

-#endif
-    return TRUE;
+
+    return true;
+#endif // __WXWINCE__/!__WXWINCE__

 }
 
 // ctor and dtor
 }
 
 // ctor and dtor


@@ -1057,7 +1033,7 @@ bool wxThread::SetConcurrency(size_t level)
 
 wxThread::wxThread(wxThreadKind kind)
 {
 
 wxThread::wxThread(wxThreadKind kind)
 {

-    m_internal = new wxThreadInternal();
+    m_internal = new wxThreadInternal(this);

 
     m_isDetached = kind == wxTHREAD_DETACHED;
 }
 
     m_isDetached = kind == wxTHREAD_DETACHED;
 }


@@ -1116,39 +1092,21 @@ wxThreadError wxThread::Resume()
 
 wxThread::ExitCode wxThread::Wait()
 {
 
 wxThread::ExitCode wxThread::Wait()
 {

+    ExitCode rc = (ExitCode)THREAD_ERROR_EXIT;
+

     // although under Windows we can wait for any thread, it's an error to
     // wait for a detached one in wxWin API
     // 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,
+    wxCHECK_MSG( !IsDetached(), rc,

                  _T("wxThread::Wait(): can't wait for detached thread") );
 
                  _T("wxThread::Wait(): can't wait for detached thread") );
 

-    ExitCode rc = (ExitCode)-1;
-
-    (void)m_internal->WaitForTerminate(false, m_critsect, &rc);
-
-    m_internal->Free();
-
-    wxCriticalSectionLocker lock(m_critsect);
-    m_internal->SetState(STATE_EXITED);
+    (void)m_internal->WaitForTerminate(m_critsect, &rc);

 
     return rc;
 }
 
 wxThreadError wxThread::Delete(ExitCode *pRc)
 {
 
     return rc;
 }
 
 wxThreadError wxThread::Delete(ExitCode *pRc)
 {

-    wxThreadError rc = m_internal->WaitForTerminate(true, m_critsect, pRc);
-
-    if ( IsDetached() )
-    {
-        delete this;
-    }
-    else // joinable
-    {
-        // update the status of the joinable thread
-        wxCriticalSectionLocker lock(m_critsect);
-        m_internal->SetState(STATE_EXITED);
-    }
-
-    return rc;
+    return m_internal->WaitForTerminate(m_critsect, pRc, this);

 }
 
 wxThreadError wxThread::Kill()
 }
 
 wxThreadError wxThread::Kill()


@@ -1188,7 +1146,7 @@ void wxThread::Exit(ExitCode status)
     }
 
 #ifdef wxUSE_BEGIN_THREAD
     }
 
 #ifdef wxUSE_BEGIN_THREAD

-    _endthreadex((unsigned)status);
+    _endthreadex(wxPtrToUInt(status));

 #else // !VC++
     ::ExitThread((DWORD)status);
 #endif // VC++/!VC++
 #else // !VC++
     ::ExitThread((DWORD)status);
 #endif // VC++/!VC++


@@ -1276,7 +1234,7 @@ bool wxThreadModule::OnInit()
         // words, this should never happen
         wxLogSysError(_("Thread module initialization failed: impossible to allocate index in thread local storage"));
 
         // words, this should never happen
         wxLogSysError(_("Thread module initialization failed: impossible to allocate index in thread local storage"));
 

-        return FALSE;
+        return false;

     }
 
     // main thread doesn't have associated wxThread object, so store 0 in the
     }
 
     // main thread doesn't have associated wxThread object, so store 0 in the


@@ -1288,7 +1246,7 @@ bool wxThreadModule::OnInit()
 
         wxLogSysError(_("Thread module initialization failed: can not store value in thread local storage"));
 
 
         wxLogSysError(_("Thread module initialization failed: can not store value in thread local storage"));
 

-        return FALSE;
+        return false;

     }
 
     gs_critsectWaitingForGui = new wxCriticalSection();
     }
 
     gs_critsectWaitingForGui = new wxCriticalSection();


@@ -1296,10 +1254,12 @@ bool wxThreadModule::OnInit()
     gs_critsectGui = new wxCriticalSection();
     gs_critsectGui->Enter();
 
     gs_critsectGui = new wxCriticalSection();
     gs_critsectGui->Enter();
 

+    gs_critsectThreadDelete = new wxCriticalSection;
+

     // no error return for GetCurrentThreadId()
     gs_idMainThread = ::GetCurrentThreadId();
 
     // no error return for GetCurrentThreadId()
     gs_idMainThread = ::GetCurrentThreadId();
 

-    return TRUE;
+    return true;

 }
 
 void wxThreadModule::OnExit()
 }
 
 void wxThreadModule::OnExit()


@@ -1309,6 +1269,9 @@ void wxThreadModule::OnExit()
         wxLogLastError(wxT("TlsFree failed."));
     }
 
         wxLogLastError(wxT("TlsFree failed."));
     }
 

+    delete gs_critsectThreadDelete;
+    gs_critsectThreadDelete = NULL;
+

     if ( gs_critsectGui )
     {
         gs_critsectGui->Leave();
     if ( gs_critsectGui )
     {
         gs_critsectGui->Leave();


@@ -1325,7 +1288,7 @@ void wxThreadModule::OnExit()
 // not a mutex, so the names are a bit confusing
 // ----------------------------------------------------------------------------
 
 // not a mutex, so the names are a bit confusing
 // ----------------------------------------------------------------------------
 

-void WXDLLIMPEXP_BASE wxMutexGuiEnter()
+void wxMutexGuiEnterImpl()

 {
     // this would dead lock everything...
     wxASSERT_MSG( !wxThread::IsMain(),
 {
     // this would dead lock everything...
     wxASSERT_MSG( !wxThread::IsMain(),


@@ -1347,13 +1310,13 @@ void WXDLLIMPEXP_BASE wxMutexGuiEnter()
     gs_critsectGui->Enter();
 }
 
     gs_critsectGui->Enter();
 }
 

-void WXDLLIMPEXP_BASE wxMutexGuiLeave()
+void wxMutexGuiLeaveImpl()

 {
     wxCriticalSectionLocker enter(*gs_critsectWaitingForGui);
 
     if ( wxThread::IsMain() )
     {
 {
     wxCriticalSectionLocker enter(*gs_critsectWaitingForGui);
 
     if ( wxThread::IsMain() )
     {

-        gs_bGuiOwnedByMainThread = FALSE;
+        gs_bGuiOwnedByMainThread = false;

     }
     else
     {
     }
     else
     {


@@ -1384,7 +1347,7 @@ void WXDLLIMPEXP_BASE wxMutexGuiLeaveOrEnter()
         {
             gs_critsectGui->Enter();
 
         {
             gs_critsectGui->Enter();
 

-            gs_bGuiOwnedByMainThread = TRUE;
+            gs_bGuiOwnedByMainThread = true;

         }
         //else: already have it, nothing to do
     }
         }
         //else: already have it, nothing to do
     }


@@ -1427,4 +1390,3 @@ bool WXDLLIMPEXP_BASE wxIsWaitingForThread()
 #include "wx/thrimpl.cpp"
 
 #endif // wxUSE_THREADS
 #include "wx/thrimpl.cpp"
 
 #endif // wxUSE_THREADS

-