non-PCH build fix (according to Tinderbox).
[wxWidgets.git] / src / msw / thread.cpp
index 66efdf36ac33b01ec87a1a4c6c68611cebeef763..ee7fec670d7dc528a62ed77011bcc87b246122db 100644 (file)
@@ -1,19 +1,15 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        thread.cpp
+// Name:        src/msw/thread.cpp
 // Purpose:     wxThread Implementation
 // Author:      Original from Wolfram Gloger/Guilhem Lavaux
 // Modified by: Vadim Zeitlin to make it work :-)
 // Created:     04/22/98
 // RCS-ID:      $Id$
-// Copyright:   (c) Wolfram Gloger (1996, 1997); Guilhem Lavaux (1998),
-//                  Vadim Zeitlin (1999)
+// Copyright:   (c) Wolfram Gloger (1996, 1997), Guilhem Lavaux (1998);
+//                  Vadim Zeitlin (1999-2002)
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#ifdef __GNUG__
-    #pragma implementation "thread.h"
-#endif
-
 // ----------------------------------------------------------------------------
 // headers
 // ----------------------------------------------------------------------------
     #pragma hdrstop
 #endif
 
+#if wxUSE_THREADS
+
+#include "wx/thread.h"
+
 #ifndef WX_PRECOMP
-#    include "wx/wx.h"
+    #include "wx/msw/missing.h"
+    #include "wx/intl.h"
+    #include "wx/app.h"
+    #include "wx/module.h"
 #endif
 
-#if wxUSE_THREADS
+#include "wx/apptrait.h"
+#include "wx/scopeguard.h"
 
 #include "wx/msw/private.h"
+#include "wx/msw/seh.h"
 
-#include "wx/module.h"
-#include "wx/thread.h"
-
-#ifdef Yield
-#    undef Yield
-#endif
+#include "wx/except.h"
 
 // must have this symbol defined to get _beginthread/_endthread declarations
 #ifndef _MT
     #define _MT
 #endif
 
+#if defined(__BORLANDC__)
+    #if !defined(__MT__)
+        // I can't set -tWM in the IDE (anyone?) so have to do this
+        #define __MT__
+    #endif
+
+    #if !defined(__MFC_COMPAT__)
+        // Needed to know about _beginthreadex etc..
+        #define __MFC_COMPAT__
+    #endif
+#endif // BC++
+
+// define wxUSE_BEGIN_THREAD if the compiler has _beginthreadex() function
+// which should be used instead of Win32 ::CreateThread() if possible
 #if defined(__VISUALC__) || \
     (defined(__BORLANDC__) && (__BORLANDC__ >= 0x500)) || \
-    (defined(__GNUG__) && defined(__MSVCRT__))
+    (defined(__GNUG__) && defined(__MSVCRT__)) || \
+    defined(__WATCOMC__) || defined(__MWERKS__)
 
-#if defined(__BORLANDC__) && !defined(__MT__)
-// I can't set -tWM in the IDE (anyone?) so have to do this
-#define __MT__
+#ifndef __WXWINCE__
+    #undef wxUSE_BEGIN_THREAD
+    #define wxUSE_BEGIN_THREAD
 #endif
 
-#if defined(__BORLANDC__) && !defined(__MFC_COMPAT__)
-// Needed to know about _beginthreadex etc..
-#define __MFC_COMPAT__
 #endif
 
+#ifdef wxUSE_BEGIN_THREAD
+    // this is where _beginthreadex() is declared
     #include <process.h>
+
+    // the return type of the thread function entry point
+    typedef unsigned THREAD_RETVAL;
+
+    // the calling convention of the thread function entry point
+    #define THREAD_CALLCONV __stdcall
+#else
+    // the settings for CreateThread()
+    typedef DWORD THREAD_RETVAL;
+    #define THREAD_CALLCONV WINAPI
 #endif
 
 // ----------------------------------------------------------------------------
@@ -88,8 +112,8 @@ static DWORD gs_tlsThisThread = 0xFFFFFFFF;
 // 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
@@ -99,248 +123,254 @@ static wxCriticalSection *gs_critsectGui = 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?
-static bool gs_waitingForThread = FALSE;
+static bool gs_waitingForThread = false;
 
 // ============================================================================
-// Windows implementation of thread classes
+// Windows implementation of thread and related classes
 // ============================================================================
 
 // ----------------------------------------------------------------------------
-// wxMutex implementation
+// wxCriticalSection
+// ----------------------------------------------------------------------------
+
+wxCriticalSection::wxCriticalSection()
+{
+    wxCOMPILE_TIME_ASSERT( sizeof(CRITICAL_SECTION) <= sizeof(wxCritSectBuffer),
+                           wxCriticalSectionBufferTooSmall );
+
+    ::InitializeCriticalSection((CRITICAL_SECTION *)m_buffer);
+}
+
+wxCriticalSection::~wxCriticalSection()
+{
+    ::DeleteCriticalSection((CRITICAL_SECTION *)m_buffer);
+}
+
+void wxCriticalSection::Enter()
+{
+    ::EnterCriticalSection((CRITICAL_SECTION *)m_buffer);
+}
+
+void wxCriticalSection::Leave()
+{
+    ::LeaveCriticalSection((CRITICAL_SECTION *)m_buffer);
+}
+
+// ----------------------------------------------------------------------------
+// wxMutex
 // ----------------------------------------------------------------------------
 
 class wxMutexInternal
 {
 public:
-    wxMutexInternal()
-    {
-        m_mutex = ::CreateMutex(NULL, FALSE, NULL);
-        if ( !m_mutex )
-        {
-            wxLogSysError(_("Can not create mutex"));
-        }
-    }
+    wxMutexInternal(wxMutexType mutexType);
+    ~wxMutexInternal();
 
-    ~wxMutexInternal() { if ( m_mutex ) CloseHandle(m_mutex); }
+    bool IsOk() const { return m_mutex != NULL; }
+
+    wxMutexError Lock() { return LockTimeout(INFINITE); }
+    wxMutexError TryLock() { return LockTimeout(0); }
+    wxMutexError Unlock();
+
+private:
+    wxMutexError LockTimeout(DWORD milliseconds);
 
-public:
     HANDLE m_mutex;
+
+    DECLARE_NO_COPY_CLASS(wxMutexInternal)
 };
 
-wxMutex::wxMutex()
+// all mutexes are recursive under Win32 so we don't use mutexType
+wxMutexInternal::wxMutexInternal(wxMutexType WXUNUSED(mutexType))
 {
-    m_internal = new wxMutexInternal;
-
-    m_locked = 0;
+    // create a nameless (hence intra process and always private) mutex
+    m_mutex = ::CreateMutex
+                (
+                    NULL,       // default secutiry attributes
+                    false,      // not initially locked
+                    NULL        // no name
+                );
+
+    if ( !m_mutex )
+    {
+        wxLogLastError(_T("CreateMutex()"));
+    }
 }
 
-wxMutex::~wxMutex()
+wxMutexInternal::~wxMutexInternal()
 {
-    if ( m_locked > 0 )
+    if ( m_mutex )
     {
-        wxLogDebug(_T("Warning: freeing a locked mutex (%d locks)."), m_locked);
+        if ( !::CloseHandle(m_mutex) )
+        {
+            wxLogLastError(_T("CloseHandle(mutex)"));
+        }
     }
-
-    delete m_internal;
 }
 
-wxMutexError wxMutex::Lock()
+wxMutexError wxMutexInternal::LockTimeout(DWORD milliseconds)
 {
-    DWORD ret;
-
-    ret = WaitForSingleObject(m_internal->m_mutex, INFINITE);
-    switch ( ret )
+    DWORD rc = ::WaitForSingleObject(m_mutex, milliseconds);
+    if ( rc == WAIT_ABANDONED )
     {
-        case WAIT_ABANDONED:
-            return wxMUTEX_BUSY;
+        // the previous caller died without releasing the mutex, but now we can
+        // really lock it
+        wxLogDebug(_T("WaitForSingleObject() returned WAIT_ABANDONED"));
 
+        // use 0 timeout, normally we should always get it
+        rc = ::WaitForSingleObject(m_mutex, 0);
+    }
+
+    switch ( rc )
+    {
         case WAIT_OBJECT_0:
             // ok
             break;
 
-        case WAIT_FAILED:
-            wxLogSysError(_("Couldn't acquire a mutex lock"));
-            return wxMUTEX_MISC_ERROR;
-
         case WAIT_TIMEOUT:
+            return wxMUTEX_BUSY;
+
+        case WAIT_ABANDONED:        // checked for above
         default:
             wxFAIL_MSG(wxT("impossible return value in wxMutex::Lock"));
-    }
+            // fall through
 
-    m_locked++;
-    return wxMUTEX_NO_ERROR;
-}
-
-wxMutexError wxMutex::TryLock()
-{
-    DWORD ret;
-
-    ret = WaitForSingleObject(m_internal->m_mutex, 0);
-    if (ret == WAIT_TIMEOUT || ret == WAIT_ABANDONED)
-        return wxMUTEX_BUSY;
+        case WAIT_FAILED:
+            wxLogLastError(_T("WaitForSingleObject(mutex)"));
+            return wxMUTEX_MISC_ERROR;
+    }
 
-    m_locked++;
     return wxMUTEX_NO_ERROR;
 }
 
-wxMutexError wxMutex::Unlock()
+wxMutexError wxMutexInternal::Unlock()
 {
-    if (m_locked > 0)
-        m_locked--;
-
-    BOOL ret = ReleaseMutex(m_internal->m_mutex);
-    if ( ret == 0 )
+    if ( !::ReleaseMutex(m_mutex) )
     {
-        wxLogSysError(_("Couldn't release a mutex"));
+        wxLogLastError(_T("ReleaseMutex()"));
+
         return wxMUTEX_MISC_ERROR;
     }
 
     return wxMUTEX_NO_ERROR;
 }
 
-// ----------------------------------------------------------------------------
-// wxCondition implementation
-// ----------------------------------------------------------------------------
+// --------------------------------------------------------------------------
+// wxSemaphore
+// --------------------------------------------------------------------------
 
-class wxConditionInternal
+// a trivial wrapper around Win32 semaphore
+class wxSemaphoreInternal
 {
 public:
-    wxConditionInternal()
+    wxSemaphoreInternal(int initialcount, int maxcount);
+    ~wxSemaphoreInternal();
+
+    bool IsOk() const { return m_semaphore != NULL; }
+
+    wxSemaError Wait() { return WaitTimeout(INFINITE); }
+
+    wxSemaError TryWait()
     {
-        m_hEvent = ::CreateEvent(
-                                 NULL,   // default secutiry
-                                 FALSE,  // not manual reset
-                                 FALSE,  // nonsignaled initially
-                                 NULL    // nameless event
-                                );
-        if ( !m_hEvent )
-        {
-            wxLogSysError(_("Can not create event object."));
-        }
+        wxSemaError rc = WaitTimeout(0);
+        if ( rc == wxSEMA_TIMEOUT )
+            rc = wxSEMA_BUSY;
 
-        // nobody waits for us yet
-        m_nWaiters = 0;
+        return rc;
     }
 
-    bool Wait(DWORD timeout)
-    {
-        // as m_nWaiters variable is accessed from multiple waiting threads
-        // (and possibly from the broadcasting thread), we need to change its
-        // value atomically
-        ::InterlockedIncrement(&m_nWaiters);
+    wxSemaError WaitTimeout(unsigned long milliseconds);
 
-        // FIXME this should be MsgWaitForMultipleObjects() as we want to keep
-        //       processing Windows messages while waiting (or don't we?)
-        DWORD rc = ::WaitForSingleObject(m_hEvent, timeout);
+    wxSemaError Post();
 
-        ::InterlockedDecrement(&m_nWaiters);
+private:
+    HANDLE m_semaphore;
 
-        return rc != WAIT_TIMEOUT;
-    }
+    DECLARE_NO_COPY_CLASS(wxSemaphoreInternal)
+};
 
-    void Signal()
+wxSemaphoreInternal::wxSemaphoreInternal(int initialcount, int maxcount)
+{
+#if !defined(_WIN32_WCE) || (_WIN32_WCE >= 300)
+    if ( maxcount == 0 )
     {
-        // set the event to signaled: if a thread is already waiting on it, it
-        // will be woken up, otherwise the event will remain in the signaled
-        // state until someone waits on it. In any case, the system will return
-        // it to a non signalled state afterwards. If multiple threads are
-        // waiting, only one will be woken up.
-        if ( !::SetEvent(m_hEvent) )
-        {
-            wxLogLastError(wxT("SetEvent"));
-        }
+        // make it practically infinite
+        maxcount = INT_MAX;
     }
 
-    void Broadcast()
+    m_semaphore = ::CreateSemaphore
+                    (
+                        NULL,           // default security attributes
+                        initialcount,
+                        maxcount,
+                        NULL            // no name
+                    );
+#endif
+    if ( !m_semaphore )
     {
-        // this works because all these threads are already waiting and so each
-        // SetEvent() inside Signal() is really a PulseEvent() because the
-        // event state is immediately returned to non-signaled
-        for ( LONG n = 0; n < m_nWaiters; n++ )
-        {
-            Signal();
-        }
+        wxLogLastError(_T("CreateSemaphore()"));
     }
+}
 
-    ~wxConditionInternal()
+wxSemaphoreInternal::~wxSemaphoreInternal()
+{
+    if ( m_semaphore )
     {
-        if ( m_hEvent )
+        if ( !::CloseHandle(m_semaphore) )
         {
-            if ( !::CloseHandle(m_hEvent) )
-            {
-                wxLogLastError(wxT("CloseHandle(event)"));
-            }
+            wxLogLastError(_T("CloseHandle(semaphore)"));
         }
     }
-
-private:
-    // the Win32 synchronization object corresponding to this event
-    HANDLE m_hEvent;
-
-    // number of threads waiting for this condition
-    LONG m_nWaiters;
-};
-
-wxCondition::wxCondition()
-{
-    m_internal = new wxConditionInternal;
-}
-
-wxCondition::~wxCondition()
-{
-    delete m_internal;
 }
 
-void wxCondition::Wait()
+wxSemaError wxSemaphoreInternal::WaitTimeout(unsigned long milliseconds)
 {
-    (void)m_internal->Wait(INFINITE);
-}
-
-bool wxCondition::Wait(unsigned long sec,
-                       unsigned long nsec)
-{
-    return m_internal->Wait(sec*1000 + nsec/1000000);
-}
-
-void wxCondition::Signal()
-{
-    m_internal->Signal();
-}
-
-void wxCondition::Broadcast()
-{
-    m_internal->Broadcast();
-}
+    DWORD rc = ::WaitForSingleObject( m_semaphore, milliseconds );
 
-// ----------------------------------------------------------------------------
-// wxCriticalSection implementation
-// ----------------------------------------------------------------------------
+    switch ( rc )
+    {
+        case WAIT_OBJECT_0:
+           return wxSEMA_NO_ERROR;
 
-wxCriticalSection::wxCriticalSection()
-{
-    wxASSERT_MSG( sizeof(CRITICAL_SECTION) <= sizeof(m_buffer),
-                  _T("must increase buffer size in wx/thread.h") );
+        case WAIT_TIMEOUT:
+           return wxSEMA_TIMEOUT;
 
-    ::InitializeCriticalSection((CRITICAL_SECTION *)m_buffer);
-}
+        default:
+            wxLogLastError(_T("WaitForSingleObject(semaphore)"));
+    }
 
-wxCriticalSection::~wxCriticalSection()
-{
-    ::DeleteCriticalSection((CRITICAL_SECTION *)m_buffer);
+    return wxSEMA_MISC_ERROR;
 }
 
-void wxCriticalSection::Enter()
+wxSemaError wxSemaphoreInternal::Post()
 {
-    ::EnterCriticalSection((CRITICAL_SECTION *)m_buffer);
-}
+#if !defined(_WIN32_WCE) || (_WIN32_WCE >= 300)
+    if ( !::ReleaseSemaphore(m_semaphore, 1, NULL /* ptr to previous count */) )
+    {
+        if ( GetLastError() == ERROR_TOO_MANY_POSTS )
+        {
+            return wxSEMA_OVERFLOW;
+        }
+        else
+        {
+            wxLogLastError(_T("ReleaseSemaphore"));
+            return wxSEMA_MISC_ERROR;
+        }
+    }
 
-void wxCriticalSection::Leave()
-{
-    ::LeaveCriticalSection((CRITICAL_SECTION *)m_buffer);
+    return wxSEMA_NO_ERROR;
+#else
+    return wxSEMA_MISC_ERROR;
+#endif
 }
 
 // ----------------------------------------------------------------------------
@@ -353,11 +383,13 @@ void wxCriticalSection::Leave()
 class wxThreadInternal
 {
 public:
-    wxThreadInternal()
+    wxThreadInternal(wxThread *thread)
     {
+        m_thread = thread;
         m_hThread = 0;
         m_state = STATE_NEW;
         m_priority = WXTHREAD_DEFAULT_PRIORITY;
+        m_nRef = 1;
     }
 
     ~wxThreadInternal()
@@ -379,7 +411,16 @@ public:
     }
 
     // create a new (suspended) thread (for the given thread object)
-    bool Create(wxThread *thread);
+    bool Create(wxThread *thread, unsigned int stackSize);
+
+    // wait for the thread to terminate, either by itself, or by asking it
+    // (politely, this is not Kill()!) to do it
+    wxThreadError WaitForTerminate(wxCriticalSection& cs,
+                                   wxThread::ExitCode *pRc,
+                                   wxThread *threadToDelete = NULL);
+
+    // kill the thread unconditionally
+    wxThreadError Kill();
 
     // suspend/resume/terminate
     bool Suspend();
@@ -398,57 +439,133 @@ public:
     HANDLE GetHandle() const { return m_hThread; }
     DWORD  GetId() const { return m_tid; }
 
-    // thread function
-    static DWORD WinThreadStart(wxThread *thread);
+    // the thread function forwarding to DoThreadStart
+    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:
+    // 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
+
+    // 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)
 };
 
-DWORD wxThreadInternal::WinThreadStart(wxThread *thread)
+// small class which keeps a thread alive during its lifetime
+class wxThreadKeepAlive
 {
-    DWORD 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
-    if ( thread->m_internal->GetState() == STATE_EXITED )
+private:
+    wxThreadInternal& m_thrImpl;
+};
+
+/* static */
+void wxThreadInternal::DoThreadOnExit(wxThread *thread)
+{
+    wxTRY
     {
-        rc = (DWORD)-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_RETVAL)-1;
+
+    wxTRY
     {
         // 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_RETVAL)-1;
         }
 
-        rc = (DWORD)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_RETVAL)-1;
+
+    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_RETVAL)-1)
+
+
+    // 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
+        //
+        // NB: can't use wxCriticalSectionLocker here as we use SEH and it's
+        //     incompatible with C++ object dtors
         thread->m_critsect.Enter();
-        wasCancelled = thread->m_internal->GetState() == STATE_CANCELED;
         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;
 }
@@ -457,7 +574,7 @@ void wxThreadInternal::SetPriority(unsigned int 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;
@@ -481,28 +598,38 @@ void wxThreadInternal::SetPriority(unsigned int priority)
     }
 }
 
-bool wxThreadInternal::Create(wxThread *thread)
+bool wxThreadInternal::Create(wxThread *thread, unsigned int stackSize)
 {
+    wxASSERT_MSG( m_state == STATE_NEW && !m_hThread,
+                    _T("Create()ing thread twice?") );
+
     // for compilers which have it, we should use C RTL function for thread
     // creation instead of Win32 API one because otherwise we will have memory
     // leaks if the thread uses C RTL (and most threads do)
-#if defined(__VISUALC__) || \
-    (defined(__BORLANDC__) && (__BORLANDC__ >= 0x500)) || \
-    (defined(__GNUG__) && defined(__MSVCRT__))
-    typedef unsigned (__stdcall *RtlThreadStart)(void *);
-
-    m_hThread = (HANDLE)_beginthreadex(NULL, 0,
-                                       (RtlThreadStart)
-                                       wxThreadInternal::WinThreadStart,
-                                       thread, CREATE_SUSPENDED,
-                                       (unsigned int *)&m_tid);
+#ifdef wxUSE_BEGIN_THREAD
+
+    // Watcom is reported to not like 0 stack size (which means "use default"
+    // for the other compilers and is also the default value for stackSize)
+#ifdef __WATCOMC__
+    if ( !stackSize )
+        stackSize = 10240;
+#endif // __WATCOMC__
+
+    m_hThread = (HANDLE)_beginthreadex
+                        (
+                          NULL,                             // default security
+                          stackSize,
+                          wxThreadInternal::WinThreadStart, // entry point
+                          thread,
+                          CREATE_SUSPENDED,
+                          (unsigned int *)&m_tid
+                        );
 #else // compiler doesn't have _beginthreadex
     m_hThread = ::CreateThread
                   (
                     NULL,                               // default security
-                    0,                                  // default stack size
-                    (LPTHREAD_START_ROUTINE)            // thread entry point
-                    wxThreadInternal::WinThreadStart,   //
+                    stackSize,                          // stack size
+                    wxThreadInternal::WinThreadStart,   // thread entry point
                     (LPVOID)thread,                     // parameter
                     CREATE_SUSPENDED,                   // flags
                     &m_tid                              // [out] thread id
@@ -513,7 +640,7 @@ bool wxThreadInternal::Create(wxThread *thread)
     {
         wxLogSysError(_("Can't create thread"));
 
-        return FALSE;
+        return false;
     }
 
     if ( m_priority != WXTHREAD_DEFAULT_PRIORITY )
@@ -521,7 +648,201 @@ bool wxThreadInternal::Create(wxThread *thread)
         SetPriority(m_priority);
     }
 
-    return TRUE;
+    return true;
+}
+
+wxThreadError wxThreadInternal::Kill()
+{
+    if ( !::TerminateThread(m_hThread, (DWORD)-1) )
+    {
+        wxLogSysError(_("Couldn't terminate thread"));
+
+        return wxTHREAD_MISC_ERROR;
+    }
+
+    Free();
+
+    return wxTHREAD_NO_ERROR;
+}
+
+wxThreadError
+wxThreadInternal::WaitForTerminate(wxCriticalSection& cs,
+                                   wxThread::ExitCode *pRc,
+                                   wxThread *threadToDelete)
+{
+    // 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;
+
+    wxThread::ExitCode rc = 0;
+
+    // we might need to resume the thread if it's currently stopped
+    bool shouldResume = false;
+
+    // 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 )
+        {
+            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
+                m_state = STATE_EXITED;
+
+                // 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;
+            }
+            //else: shouldResume is correctly set to false here, wait until
+            //      someone else runs the thread and it finishes
+        }
+        else // running, paused, cancelled or even exited
+        {
+            shouldResume = m_state == STATE_PAUSED;
+        }
+    }
+
+    // resume the thread if it is paused
+    if ( shouldResume )
+        Resume();
+
+    // 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() )
+        {
+            // give the thread we're waiting for chance to do the GUI call
+            // it might be in
+            if ( (gs_nWaitingForGui > 0) && wxGuiOwnedByMainThread() )
+            {
+                wxMutexGuiLeave();
+            }
+        }
+
+#if !defined(QS_ALLPOSTMESSAGE)
+#define QS_ALLPOSTMESSAGE 0
+#endif
+
+        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|QS_ALLPOSTMESSAGE   // return as soon as there are any events
+                 );
+
+        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 -- 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() )
+                {
+                    wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits()
+                                                   : NULL;
+
+                    if ( traits && !traits->DoMessageFromThreadWait() )
+                    {
+                        // WM_QUIT received: kill the thread
+                        Kill();
+
+                        return wxTHREAD_KILLED;
+                    }
+                }
+                break;
+
+            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
+    for ( ;; )
+    {
+        if ( !::GetExitCodeThread(m_hThread, (LPDWORD)&rc) )
+        {
+            wxLogLastError(wxT("GetExitCodeThread"));
+
+            rc = (wxThread::ExitCode)-1;
+
+            break;
+        }
+
+        if ( (DWORD)rc != STILL_ACTIVE )
+            break;
+
+        // give the other thread some time to terminate, otherwise we may be
+        // starving it
+        ::Sleep(1);
+    }
+
+    if ( pRc )
+        *pRc = 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;
 }
 
 bool wxThreadInternal::Suspend()
@@ -531,12 +852,12 @@ bool wxThreadInternal::Suspend()
     {
         wxLogSysError(_("Can not suspend thread %x"), m_hThread);
 
-        return FALSE;
+        return false;
     }
 
     m_state = STATE_PAUSED;
 
-    return TRUE;
+    return true;
 }
 
 bool wxThreadInternal::Resume()
@@ -546,18 +867,18 @@ bool wxThreadInternal::Resume()
     {
         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,
-    // the codei n Delete() wouldn't work
+    // the code in WaitForTerminate() wouldn't work
     if ( m_state != STATE_EXITED )
     {
         m_state = STATE_RUNNING;
     }
 
-    return TRUE;
+    return true;
 }
 
 // static functions
@@ -580,13 +901,9 @@ wxThread *wxThread::This()
 
 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
@@ -607,8 +924,16 @@ int wxThread::GetCPUCount()
     return si.dwNumberOfProcessors;
 }
 
-bool wxThread::SetConcurrency(size_t level)
+unsigned long wxThread::GetCurrentId()
 {
+    return (unsigned long)::GetCurrentThreadId();
+}
+
+bool wxThread::SetConcurrency(size_t WXUNUSED_IN_WINCE(level))
+{
+#ifdef __WXWINCE__
+    return false;
+#else
     wxASSERT_MSG( IsMain(), _T("should only be called from the main thread") );
 
     // ok only for the default one
@@ -617,12 +942,12 @@ bool wxThread::SetConcurrency(size_t level)
 
     // get system affinity mask first
     HANDLE hProcess = ::GetCurrentProcess();
-    DWORD dwProcMask, dwSysMask;
+    DWORD_PTR dwProcMask, dwSysMask;
     if ( ::GetProcessAffinityMask(hProcess, &dwProcMask, &dwSysMask) == 0 )
     {
         wxLogLastError(_T("GetProcessAffinityMask"));
 
-        return FALSE;
+        return false;
     }
 
     // how many CPUs have we got?
@@ -645,7 +970,7 @@ bool wxThread::SetConcurrency(size_t level)
             dwProcMask |= bit;
 
             // another process added
-            if ( !--level )
+            if ( --level == 0 )
             {
                 // and that's enough
                 break;
@@ -661,7 +986,7 @@ bool wxThread::SetConcurrency(size_t 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
@@ -689,17 +1014,18 @@ bool wxThread::SetConcurrency(size_t level)
     if ( !pfnSetProcessAffinityMask )
     {
         // msg given above - do it only once
-        return FALSE;
+        return false;
     }
 
     if ( pfnSetProcessAffinityMask(hProcess, dwProcMask) == 0 )
     {
         wxLogLastError(_T("SetProcessAffinityMask"));
 
-        return FALSE;
+        return false;
     }
 
-    return TRUE;
+    return true;
+#endif // __WXWINCE__/!__WXWINCE__
 }
 
 // ctor and dtor
@@ -707,7 +1033,7 @@ bool wxThread::SetConcurrency(size_t level)
 
 wxThread::wxThread(wxThreadKind kind)
 {
-    m_internal = new wxThreadInternal();
+    m_internal = new wxThreadInternal(this);
 
     m_isDetached = kind == wxTHREAD_DETACHED;
 }
@@ -720,11 +1046,11 @@ wxThread::~wxThread()
 // create/start thread
 // -------------------
 
-wxThreadError wxThread::Create()
+wxThreadError wxThread::Create(unsigned int stackSize)
 {
     wxCriticalSectionLocker lock(m_critsect);
 
-    if ( !m_internal->Create(this) )
+    if ( !m_internal->Create(this, stackSize) )
         return wxTHREAD_NO_RESOURCE;
 
     return wxTHREAD_NO_ERROR;
@@ -769,178 +1095,18 @@ wxThread::ExitCode wxThread::Wait()
     // 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") );
+                 _T("wxThread::Wait(): can't wait for detached thread") );
 
     ExitCode rc = (ExitCode)-1;
 
-    (void)Delete(&rc);
-
-    m_internal->Free();
+    (void)m_internal->WaitForTerminate(m_critsect, &rc);
 
     return rc;
 }
 
 wxThreadError wxThread::Delete(ExitCode *pRc)
 {
-    ExitCode rc = 0;
-
-    // Delete() is always safe to call, so consider all possible states
-
-    // 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(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();
-
-    HANDLE hThread = m_internal->GetHandle();
-
-    // does is still run?
-    if ( isRunning || IsRunning() )
-    {
-        if ( IsMain() )
-        {
-            // set flag for wxIsWaitingForThread()
-            gs_waitingForThread = 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
-        // 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;
-        do
-        {
-            result = ::MsgWaitForMultipleObjects
-                     (
-                       1,              // number of objects to wait for
-                       &hThread,       // the objects
-                       FALSE,          // don't wait for all objects
-                       INFINITE,       // no timeout
-                       QS_ALLEVENTS    // return as soon as there are any events
-                     );
-
-            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
-                    if ( !wxTheApp->DoMessage() )
-                    {
-                        // WM_QUIT received: kill the thread
-                        Kill();
-
-                        return wxTHREAD_KILLED;
-                    }
-
-                    if ( IsMain() )
-                    {
-                        // give the thread we're waiting for chance to exit
-                        // from the GUI call it might have been in
-                        if ( (gs_nWaitingForGui > 0) && wxGuiOwnedByMainThread() )
-                        {
-                            wxMutexGuiLeave();
-                        }
-                    }
-
-                    break;
-
-                default:
-                    wxFAIL_MSG(wxT("unexpected result of MsgWaitForMultipleObject"));
-            }
-        } while ( result != WAIT_OBJECT_0 );
-#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 ( WaitForSingleObject(hThread, INFINITE) != WAIT_OBJECT_0 )
-        {
-            wxFAIL_MSG(wxT("unexpected result of WaitForSingleObject"));
-        }
-#endif // wxUSE_GUI/!wxUSE_GUI
-
-        if ( IsMain() )
-        {
-            gs_waitingForThread = FALSE;
-
-#if wxUSE_GUI
-            wxEndBusyCursor();
-#endif // wxUSE_GUI
-        }
-    }
-
-    if ( !::GetExitCodeThread(hThread, (LPDWORD)&rc) )
-    {
-        wxLogLastError(wxT("GetExitCodeThread"));
-
-        rc = (ExitCode)-1;
-    }
-
-    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;
-    }
-
-    wxASSERT_MSG( (DWORD)rc != STILL_ACTIVE,
-                  wxT("thread must be already terminated.") );
-
-    if ( pRc )
-        *pRc = rc;
-
-    return rc == (ExitCode)-1 ? wxTHREAD_MISC_ERROR : wxTHREAD_NO_ERROR;
+    return m_internal->WaitForTerminate(m_critsect, pRc, this);
 }
 
 wxThreadError wxThread::Kill()
@@ -948,21 +1114,20 @@ wxThreadError wxThread::Kill()
     if ( !IsRunning() )
         return wxTHREAD_NOT_RUNNING;
 
-    if ( !::TerminateThread(m_internal->GetHandle(), (DWORD)-1) )
-    {
-        wxLogSysError(_("Couldn't terminate thread"));
-
-        return wxTHREAD_MISC_ERROR;
-    }
-
-    m_internal->Free();
+    wxThreadError rc = m_internal->Kill();
 
     if ( IsDetached() )
     {
         delete this;
     }
+    else // joinable
+    {
+        // update the status of the joinable thread
+        wxCriticalSectionLocker lock(m_critsect);
+        m_internal->SetState(STATE_EXITED);
+    }
 
-    return wxTHREAD_NO_ERROR;
+    return rc;
 }
 
 void wxThread::Exit(ExitCode status)
@@ -973,10 +1138,14 @@ void wxThread::Exit(ExitCode status)
     {
         delete this;
     }
+    else // joinable
+    {
+        // update the status of the joinable thread
+        wxCriticalSectionLocker lock(m_critsect);
+        m_internal->SetState(STATE_EXITED);
+    }
 
-#if defined(__VISUALC__) || \
-    (defined(__BORLANDC__) && (__BORLANDC__ >= 0x500)) || \
-    (defined(__GNUG__) && defined(__MSVCRT__))
+#ifdef wxUSE_BEGIN_THREAD
     _endthreadex((unsigned)status);
 #else // !VC++
     ::ExitThread((DWORD)status);
@@ -1065,7 +1234,7 @@ bool wxThreadModule::OnInit()
         // 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
@@ -1077,7 +1246,7 @@ bool wxThreadModule::OnInit()
 
         wxLogSysError(_("Thread module initialization failed: can not store value in thread local storage"));
 
-        return FALSE;
+        return false;
     }
 
     gs_critsectWaitingForGui = new wxCriticalSection();
@@ -1085,10 +1254,12 @@ bool wxThreadModule::OnInit()
     gs_critsectGui = new wxCriticalSection();
     gs_critsectGui->Enter();
 
+    gs_critsectThreadDelete = new wxCriticalSection;
+
     // no error return for GetCurrentThreadId()
     gs_idMainThread = ::GetCurrentThreadId();
 
-    return TRUE;
+    return true;
 }
 
 void wxThreadModule::OnExit()
@@ -1098,6 +1269,9 @@ void wxThreadModule::OnExit()
         wxLogLastError(wxT("TlsFree failed."));
     }
 
+    delete gs_critsectThreadDelete;
+    gs_critsectThreadDelete = NULL;
+
     if ( gs_critsectGui )
     {
         gs_critsectGui->Leave();
@@ -1114,7 +1288,7 @@ void wxThreadModule::OnExit()
 // not a mutex, so the names are a bit confusing
 // ----------------------------------------------------------------------------
 
-void WXDLLEXPORT wxMutexGuiEnter()
+void WXDLLIMPEXP_BASE wxMutexGuiEnter()
 {
     // this would dead lock everything...
     wxASSERT_MSG( !wxThread::IsMain(),
@@ -1136,13 +1310,13 @@ void WXDLLEXPORT wxMutexGuiEnter()
     gs_critsectGui->Enter();
 }
 
-void WXDLLEXPORT wxMutexGuiLeave()
+void WXDLLIMPEXP_BASE wxMutexGuiLeave()
 {
     wxCriticalSectionLocker enter(*gs_critsectWaitingForGui);
 
     if ( wxThread::IsMain() )
     {
-        gs_bGuiOwnedByMainThread = FALSE;
+        gs_bGuiOwnedByMainThread = false;
     }
     else
     {
@@ -1158,7 +1332,7 @@ void WXDLLEXPORT wxMutexGuiLeave()
     gs_critsectGui->Leave();
 }
 
-void WXDLLEXPORT wxMutexGuiLeaveOrEnter()
+void WXDLLIMPEXP_BASE wxMutexGuiLeaveOrEnter()
 {
     wxASSERT_MSG( wxThread::IsMain(),
                   wxT("only main thread may call wxMutexGuiLeaveOrEnter()!") );
@@ -1173,7 +1347,7 @@ void WXDLLEXPORT wxMutexGuiLeaveOrEnter()
         {
             gs_critsectGui->Enter();
 
-            gs_bGuiOwnedByMainThread = TRUE;
+            gs_bGuiOwnedByMainThread = true;
         }
         //else: already have it, nothing to do
     }
@@ -1188,13 +1362,13 @@ void WXDLLEXPORT wxMutexGuiLeaveOrEnter()
     }
 }
 
-bool WXDLLEXPORT wxGuiOwnedByMainThread()
+bool WXDLLIMPEXP_BASE wxGuiOwnedByMainThread()
 {
     return gs_bGuiOwnedByMainThread;
 }
 
 // wake up the main thread if it's in ::GetMessage()
-void WXDLLEXPORT wxWakeUpMainThread()
+void WXDLLIMPEXP_BASE wxWakeUpMainThread()
 {
     // sending any message would do - hopefully WM_NULL is harmless enough
     if ( !::PostThreadMessage(gs_idMainThread, WM_NULL, 0, 0) )
@@ -1204,9 +1378,15 @@ void WXDLLEXPORT wxWakeUpMainThread()
     }
 }
 
-bool WXDLLEXPORT wxIsWaitingForThread()
+bool WXDLLIMPEXP_BASE wxIsWaitingForThread()
 {
     return gs_waitingForThread;
 }
 
+// ----------------------------------------------------------------------------
+// include common implementation code
+// ----------------------------------------------------------------------------
+
+#include "wx/thrimpl.cpp"
+
 #endif // wxUSE_THREADS