Slider Updates

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

diff --git a/src/mac/thread.cpp b/src/mac/thread.cpp
index 82fff92ba38b9fca81d02e7d8461e031c73aa6b8..5ea6f21f32161da7e3e231648f847f60dab88611 100644 (file)
--- a/src/mac/thread.cpp
+++ b/src/mac/thread.cpp
@@ -1,261 +1,906 @@
 /////////////////////////////////////////////////////////////////////////////
 // Name:        thread.cpp
 /////////////////////////////////////////////////////////////////////////////
 // Name:        thread.cpp

-// Purpose:     wxThread Implementation. For Unix ports, see e.g. src/gtk
-// Author:      Original from Wolfram Gloger/Guilhem Lavaux
-// Modified by:
+// Purpose:     wxThread Implementation
+// Author:      Original from Wolfram Gloger/Guilhem Lavaux/Vadim Zeitlin
+// Modified by: Stefan Csomor

 // Created:     04/22/98
 // RCS-ID:      $Id$
 // Created:     04/22/98
 // RCS-ID:      $Id$

-// Copyright:   (c) Wolfram Gloger (1996, 1997); Guilhem Lavaux (1998)
+// Copyright:   (c) Wolfram Gloger (1996, 1997); Guilhem Lavaux (1998),
+//                  Vadim Zeitlin (1999) , Stefan Csomor (2000)

 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 #ifdef __GNUG__
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 #ifdef __GNUG__

-#pragma implementation "thread.h"
+    #pragma implementation "thread.h"

 #endif
 
 #endif
 

+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#if defined(__BORLANDC__)
+    #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+    #include "wx/wx.h"
+#endif
+
+#if wxUSE_THREADS
+

 #include "wx/module.h"
 #include "wx/thread.h"
 #include "wx/module.h"
 #include "wx/thread.h"

-#include "wx/utils.h"

 
 

-enum thread_state {
-  STATE_IDLE = 0,
-  STATE_RUNNING,
-  STATE_CANCELED,
-  STATE_EXITED
+#ifdef __WXMAC__
+#include <Threads.h>
+#include "wx/mac/uma.h"
+#endif
+
+#define INFINITE 0xFFFFFFFF
+
+// ----------------------------------------------------------------------------
+// constants
+// ----------------------------------------------------------------------------
+
+// the possible states of the thread ("=>" shows all possible transitions from
+// this state)
+enum wxThreadState
+{
+    STATE_NEW,          // didn't start execution yet (=> RUNNING)
+    STATE_RUNNING,      // thread is running (=> PAUSED, CANCELED)
+    STATE_PAUSED,       // thread is temporarily suspended (=> RUNNING)
+    STATE_CANCELED,     // thread should terminate a.s.a.p. (=> EXITED)
+    STATE_EXITED        // thread is terminating

 };
 
 };
 

-/////////////////////////////////////////////////////////////////////////////
-// Static variables
-/////////////////////////////////////////////////////////////////////////////
+// ----------------------------------------------------------------------------
+// this module globals
+// ----------------------------------------------------------------------------

 
 

-wxMutex *wxMainMutex; // controls access to all GUI functions
+static ThreadID gs_idMainThread = kNoThreadID ;
+static bool gs_waitingForThread = FALSE ;

 
 

-/////////////////////////////////////////////////////////////////////////////
-// Windows implementation
-/////////////////////////////////////////////////////////////////////////////
+// ============================================================================
+// MacOS implementation of thread classes
+// ============================================================================

 
 

-class wxMutexInternal {
+class wxMacStCritical
+{
+public :
+    wxMacStCritical()
+    {
+        if ( UMASystemIsInitialized() )
+            ThreadBeginCritical() ;
+    }
+    ~wxMacStCritical()
+    {
+        if ( UMASystemIsInitialized() )
+            ThreadEndCritical() ;
+    }
+};
+
+// ----------------------------------------------------------------------------
+// wxMutex implementation
+// ----------------------------------------------------------------------------
+
+class wxMutexInternal
+{
+public:
+    wxMutexInternal(wxMutexType WXUNUSED(mutexType))
+    {
+        m_owner = kNoThreadID ;
+        m_locked = 0;
+    }
+
+    ~wxMutexInternal()
+    {
+        if ( m_locked > 0 )
+        {
+            wxLogDebug(_T("Warning: freeing a locked mutex (%ld locks)."), m_locked);
+        }
+    }
+
+    bool IsOk() const { return true; }
+
+    wxMutexError Lock() ;
+    wxMutexError TryLock() ;
+    wxMutexError Unlock();

 public:
 public:

-  // TODO: internal mutex handle
+    ThreadID m_owner ;
+    wxArrayLong m_waiters ;
+    long m_locked ;

 };
 
 };
 

-wxMutex::wxMutex()
+wxMutexError wxMutexInternal::Lock()

 {
 {

-    p_internal = new wxMutexInternal;
-    // TODO: create internal mutext handle
-    m_locked = 0;
+    wxMacStCritical critical ;
+    if ( UMASystemIsInitialized() )
+    {
+        OSErr err ;
+        ThreadID current = kNoThreadID;
+        err = ::MacGetCurrentThread(&current);
+        // if we are not the owner, add this thread to the list of waiting threads, stop this thread
+        // and invoke the scheduler to continue executing the owner's thread
+        while ( m_owner != kNoThreadID && m_owner != current)
+        {
+            m_waiters.Add(current);
+            err = ::SetThreadStateEndCritical(kCurrentThreadID, kStoppedThreadState, m_owner);
+            err = ::ThreadBeginCritical();
+        }
+        m_owner = current;
+    }
+    m_locked++;
+
+    return wxMUTEX_NO_ERROR;

 }
 
 }
 

-wxMutex::~wxMutex()
+wxMutexError wxMutexInternal::TryLock()

 {
 {

-    if (m_locked > 0)
-        wxDebugMsg("wxMutex warning: freeing a locked mutex (%d locks)\n", m_locked);
-    // TODO: free internal mutext handle
+    wxMacStCritical critical ;
+    if ( UMASystemIsInitialized() )
+    {
+        ThreadID current = kNoThreadID;
+        ::MacGetCurrentThread(&current);
+        // if we are not the owner, give an error back
+        if ( m_owner != kNoThreadID && m_owner != current )
+            return wxMUTEX_BUSY;
+
+        m_owner = current;
+    }
+    m_locked++;
+
+   return wxMUTEX_NO_ERROR;

 }
 
 }
 

-wxMutexError wxMutex::Lock()
+wxMutexError wxMutexInternal::Unlock()

 {
 {

-    // TODO
-    m_locked++;
+    if ( UMASystemIsInitialized() )
+    {
+        OSErr err;
+        err = ::ThreadBeginCritical();
+
+        if (m_locked > 0)
+            m_locked--;
+
+        // this mutex is not owned by anybody anmore
+        m_owner = kNoThreadID;
+
+        // now pass on to the first waiting thread
+        ThreadID firstWaiting = kNoThreadID;
+        bool found = false;
+        while (!m_waiters.IsEmpty() && !found)
+        {
+            firstWaiting = m_waiters[0];
+            err = ::SetThreadState(firstWaiting, kReadyThreadState, kNoThreadID);
+            // in case this was not successful (dead thread), we just loop on and reset the id
+            found = (err != threadNotFoundErr);
+            if ( !found )
+                firstWaiting = kNoThreadID ;
+            m_waiters.RemoveAt(0) ;
+        }
+        // now we have a valid firstWaiting thread, which has been scheduled to run next, just end the
+        // critical section and invoke the scheduler
+        err = ::SetThreadStateEndCritical(kCurrentThreadID, kReadyThreadState, firstWaiting);
+    }
+    else
+    {
+        if (m_locked > 0)
+            m_locked--;
+    }

     return wxMUTEX_NO_ERROR;
 }
 
     return wxMUTEX_NO_ERROR;
 }
 

-wxMutexError wxMutex::TryLock()
+// --------------------------------------------------------------------------
+// wxSemaphore
+// --------------------------------------------------------------------------
+
+// TODO not yet implemented
+
+class wxSemaphoreInternal

 {
 {

-    // TODO
-    m_locked++;
-    return wxMUTEX_NO_ERROR;
+public:
+    wxSemaphoreInternal(int initialcount, int maxcount);
+    ~wxSemaphoreInternal();
+
+    bool IsOk() const { return true ; }
+
+    wxSemaError Wait() { return WaitTimeout(INFINITE); }
+    wxSemaError TryWait() { return WaitTimeout(0); }
+    wxSemaError WaitTimeout(unsigned long milliseconds);
+
+    wxSemaError Post();
+
+private:
+};
+
+wxSemaphoreInternal::wxSemaphoreInternal(int initialcount, int maxcount)
+{
+    if ( maxcount == 0 )
+    {
+        // make it practically infinite
+        maxcount = INT_MAX;
+    }

 }
 
 }
 

-wxMutexError wxMutex::Unlock()
+wxSemaphoreInternal::~wxSemaphoreInternal()

 {
 {

-    if (m_locked > 0)
-        m_locked--;
+}

 
 

-    // TODO
-    return wxMUTEX_NO_ERROR;
+wxSemaError wxSemaphoreInternal::WaitTimeout(unsigned long milliseconds)
+{
+    return wxSEMA_MISC_ERROR;

 }
 
 }
 

-class wxConditionInternal {
+wxSemaError wxSemaphoreInternal::Post()
+{
+    return wxSEMA_MISC_ERROR;
+}
+
+// ----------------------------------------------------------------------------
+// wxCondition implementation
+// ----------------------------------------------------------------------------
+
+// TODO this is not yet completed
+
+class wxConditionInternal
+{

 public:
 public:

-  // TODO: internal handle
-  int waiters;
+    wxConditionInternal(wxMutex& mutex) : m_mutex(mutex)
+    {
+        m_excessSignals = 0 ;
+    }
+    ~wxConditionInternal()
+    {
+    }
+
+    bool IsOk() const { return m_mutex.IsOk() ; }
+    
+    wxCondError Wait()
+    {
+        return WaitTimeout(0xFFFFFFFF );
+    }
+    
+    wxCondError WaitTimeout(unsigned long msectimeout)
+    {
+        wxMacStCritical critical ;
+        if ( m_excessSignals > 0 )
+        {
+            --m_excessSignals ;
+            return wxCOND_NO_ERROR ;
+        }
+        else if ( msectimeout == 0 )
+        {
+            return wxCOND_MISC_ERROR ;
+        }
+        else
+        {
+        }
+        /*
+        waiters++;
+
+        // FIXME this should be MsgWaitForMultipleObjects() as well probably
+        DWORD rc = ::WaitForSingleObject(event, timeout);
+
+        waiters--;
+
+        return rc != WAIT_TIMEOUT;
+        */
+        return wxCOND_NO_ERROR ;
+    }
+    wxCondError Signal()
+    {
+        wxMacStCritical critical ;
+        return wxCOND_NO_ERROR;
+    }
+
+    wxCondError Broadcast()
+    {
+        wxMacStCritical critical ;
+        return wxCOND_NO_ERROR;
+    }    
+
+    wxArrayLong m_waiters ;
+    wxInt32     m_excessSignals ;
+    wxMutex&    m_mutex;

 };
 
 };
 

-wxCondition::wxCondition()
+// ----------------------------------------------------------------------------
+// wxCriticalSection implementation
+// ----------------------------------------------------------------------------
+
+// it's implemented as a mutex on mac os, so it is defined in the headers
+
+// ----------------------------------------------------------------------------
+// wxThread implementation
+// ----------------------------------------------------------------------------
+
+// wxThreadInternal class
+// ----------------------
+
+class wxThreadInternal

 {
 {

-    p_internal = new wxConditionInternal;
-    // TODO: create internal handle
-    p_internal->waiters = 0;
+public:
+    wxThreadInternal()
+    {
+        m_tid = kNoThreadID ;
+        m_state = STATE_NEW;
+        m_priority = WXTHREAD_DEFAULT_PRIORITY;
+    }
+
+    ~wxThreadInternal()
+    {
+    }
+
+    void Free()
+    {
+    }
+
+    // create a new (suspended) thread (for the given thread object)
+    bool Create(wxThread *thread, unsigned int stackSize);
+
+    // suspend/resume/terminate
+    bool Suspend();
+    bool Resume();
+    void Cancel() { m_state = STATE_CANCELED; }
+
+    // thread state
+    void SetState(wxThreadState state) { m_state = state; }
+    wxThreadState GetState() const { return m_state; }
+
+    // thread priority
+    void SetPriority(unsigned int priority);
+    unsigned int GetPriority() const { return m_priority; }
+
+    void SetResult( void *res ) { m_result = res ; }
+    void *GetResult() { return m_result ; }
+
+    // thread handle and id
+    ThreadID  GetId() const { return m_tid; }
+
+    // thread function
+    static pascal void*    MacThreadStart(wxThread* arg);
+
+private:
+    wxThreadState           m_state;      // state, see wxThreadState enum
+    unsigned int            m_priority;   // thread priority in "wx" units
+    ThreadID                m_tid;        // thread id
+    void*                   m_result;
+    static ThreadEntryUPP   s_threadEntry ;
+};
+
+static wxArrayPtrVoid s_threads ;
+
+ThreadEntryUPP wxThreadInternal::s_threadEntry = NULL ;
+pascal void* wxThreadInternal::MacThreadStart(wxThread *thread)
+{
+    // first of all, check whether we hadn't been cancelled already
+    if ( thread->m_internal->GetState() == STATE_EXITED )
+    {
+        return (void*)-1;
+    }
+
+    void* rc = thread->Entry();
+
+    // enter m_critsect before changing the thread state
+    thread->m_critsect.Enter();
+    bool 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 it the 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
+
+    return rc;
+}
+void wxThreadInternal::SetPriority(unsigned int priority)
+{
+    // Priorities don't exist on Mac
+}
+
+bool wxThreadInternal::Create(wxThread *thread, unsigned int stackSize)
+{
+    if ( s_threadEntry == NULL )
+    {
+        s_threadEntry = NewThreadEntryUPP( (ThreadEntryProcPtr) MacThreadStart ) ;
+    }
+    OSErr err = NewThread( kCooperativeThread,
+                           s_threadEntry,
+                           (void*) thread,
+                           stackSize,
+                           kNewSuspend,
+                           &m_result,
+                           &m_tid );
+
+    if ( err != noErr )
+    {
+        wxLogSysError(_("Can't create thread"));
+        return FALSE;
+    }
+
+    if ( m_priority != WXTHREAD_DEFAULT_PRIORITY )
+    {
+        SetPriority(m_priority);
+    }
+
+    return TRUE;

 }
 
 }
 

-wxCondition::~wxCondition()
+bool wxThreadInternal::Suspend()

 {
 {

-    // TODO: destroy internal handle
+    OSErr err ;
+
+    ::ThreadBeginCritical();
+
+    if ( m_state != STATE_RUNNING )
+    {
+        ::ThreadEndCritical() ;
+        wxLogSysError(_("Can not suspend thread %x"), m_tid);
+        return FALSE;
+    }
+
+    m_state = STATE_PAUSED;
+
+    err = ::SetThreadStateEndCritical(m_tid, kStoppedThreadState, kNoThreadID);
+
+    return TRUE;

 }
 
 }
 

-void wxCondition::Wait(wxMutex& mutex)
+bool wxThreadInternal::Resume()

 {
 {

-    mutex.Unlock();
-    p_internal->waiters++;
-    // TODO wait here
-    p_internal->waiters--;
-    mutex.Lock();
+    ThreadID current ;
+    OSErr err ;
+    err = MacGetCurrentThread( &current ) ;
+
+    wxASSERT( err == noErr ) ;
+    wxASSERT( current != m_tid ) ;
+
+    ::ThreadBeginCritical();
+    if ( m_state != STATE_PAUSED && m_state != STATE_NEW )
+    {
+        ::ThreadEndCritical() ;
+        wxLogSysError(_("Can not resume thread %x"), m_tid);
+        return FALSE;
+
+    }
+    err = ::SetThreadStateEndCritical(m_tid, kReadyThreadState, kNoThreadID);
+    wxASSERT( err == noErr ) ;
+
+    m_state = STATE_RUNNING;
+    ::ThreadEndCritical() ;
+    ::YieldToAnyThread() ;
+    return TRUE;

 }
 
 }
 

-bool wxCondition::Wait(wxMutex& mutex, unsigned long sec,
-                       unsigned long nsec)
+// static functions
+// ----------------
+wxThread *wxThread::This()

 {
 {

-    mutex.Unlock();
-    p_internal->waiters++;
+    wxMacStCritical critical ;
+
+    ThreadID current ;
+    OSErr err ;

 
 

-    // TODO wait here
-    p_internal->waiters--;
-    mutex.Lock();
+    err = MacGetCurrentThread( &current ) ;

 
 

-    return FALSE;
+    for ( size_t i = 0 ; i < s_threads.Count() ; ++i )
+    {
+        if ( ( (wxThread*) s_threads[i] )->GetId() == current )
+            return (wxThread*) s_threads[i] ;
+    }
+
+    wxLogSysError(_("Couldn't get the current thread pointer"));
+    return NULL;

 }
 
 }
 

-void wxCondition::Signal()
+bool wxThread::IsMain()

 {
 {

-    // TODO
+    ThreadID current ;
+    OSErr err ;
+
+    err = MacGetCurrentThread( &current ) ;
+    return current == gs_idMainThread;

 }
 
 }
 

-void wxCondition::Broadcast()
+#ifdef Yield
+#undef Yield
+#endif
+
+void wxThread::Yield()

 {
 {

-    // TODO
+    ::YieldToAnyThread() ;

 }
 
 }
 

-class wxThreadInternal {
-public:
-    // TODO
-};
+void wxThread::Sleep(unsigned long milliseconds)
+{
+        clock_t start = clock() ;
+        do
+        {
+            YieldToAnyThread() ;
+        } while( clock() - start < milliseconds / CLOCKS_PER_SEC ) ;
+}

 
 

-wxThreadError wxThread::Create()
+int wxThread::GetCPUCount()

 {
 {

-    // TODO
-    return wxTHREAD_NO_ERROR;
+    // we will use whatever MP API will be used for the new MP Macs
+    return 1;

 }
 
 }
 

-wxThreadError wxThread::Destroy()
+unsigned long wxThread::GetCurrentId()

 {
 {

-    // TODO
-    return wxTHREAD_NO_ERROR;
+    ThreadID current ;
+    MacGetCurrentThread( &current ) ;
+    return (unsigned long)current;

 }
 
 }
 

-wxThreadError wxThread::Pause()
+bool wxThread::SetConcurrency(size_t level)

 {
 {

-    // TODO
-    return wxTHREAD_NO_ERROR;
+    wxASSERT_MSG( IsMain(), _T("should only be called from the main thread") );
+
+    // ok only for the default one
+    if ( level == 0 )
+        return 0;
+
+    // how many CPUs have we got?
+    if ( GetCPUCount() == 1 )
+    {
+        // don't bother with all this complicated stuff - on a single
+        // processor system it doesn't make much sense anyhow
+        return level == 1;
+    }
+
+    return TRUE ;

 }
 
 }
 

-wxThreadError wxThread::Resume()
+// ctor and dtor
+// -------------
+
+wxThread::wxThread(wxThreadKind kind)

 {
 {

-    // TODO
-    return wxTHREAD_NO_ERROR;
+    m_internal = new wxThreadInternal();
+
+    m_isDetached = kind == wxTHREAD_DETACHED;
+    s_threads.Add( (void*) this ) ;

 }
 
 }
 

-void wxThread::Exit(void *status)
+wxThread::~wxThread()

 {
 {

-    // TODO
+    s_threads.Remove( (void*) this ) ;
+    if (m_internal != NULL) {
+        delete m_internal;
+        m_internal = NULL;
+    }

 }
 
 }
 

-void wxThread::SetPriority(int prio)
+// create/start thread
+// -------------------
+
+wxThreadError wxThread::Create(unsigned int stackSize)

 {
 {

-    // TODO
+    wxCriticalSectionLocker lock(m_critsect);
+
+    if ( !m_internal->Create(this, stackSize) )
+        return wxTHREAD_NO_RESOURCE;
+
+    return wxTHREAD_NO_ERROR;

 }
 
 }
 

-int wxThread::GetPriority() const
+wxThreadError wxThread::Run()

 {
 {

-    // TODO
-    return 0;
+    wxCriticalSectionLocker lock(m_critsect);
+
+    if ( m_internal->GetState() != STATE_NEW )
+    {
+        // actually, it may be almost any state at all, not only STATE_RUNNING
+        return wxTHREAD_RUNNING;
+    }
+
+    // the thread has just been created and is still suspended - let it run
+    return Resume();

 }
 
 }
 

-void wxThread::DeferDestroy(bool on)
+// suspend/resume thread
+// ---------------------
+
+wxThreadError wxThread::Pause()

 {
 {

-    // TODO
+    wxCriticalSectionLocker lock(m_critsect);
+
+    return m_internal->Suspend() ? wxTHREAD_NO_ERROR : wxTHREAD_MISC_ERROR;

 }
 
 }
 

-void wxThread::TestDestroy()
+wxThreadError wxThread::Resume()

 {
 {

-    // TODO
+    wxCriticalSectionLocker lock(m_critsect);
+
+    return m_internal->Resume() ? wxTHREAD_NO_ERROR : wxTHREAD_MISC_ERROR;

 }
 
 }
 

-void *wxThread::Join()
+// stopping thread
+// ---------------
+
+wxThread::ExitCode wxThread::Wait()

 {
 {

-    // TODO
-    return (void*) NULL;
+    // although under MacOS 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;

 }
 
 }
 

-unsigned long wxThread::GetID() const
+wxThreadError wxThread::Delete(ExitCode *pRc)

 {
 {

-    // TODO
-    return 0;
+    ExitCode rc = 0;
+
+    // Delete() is always safe to call, so consider all possible states
+
+    // has the thread started to run?
+    bool shouldResume = FALSE;
+
+    {
+        wxCriticalSectionLocker lock(m_critsect);
+
+        if ( m_internal->GetState() == STATE_NEW )
+        {
+            // WinThreadStart() will see it and terminate immediately
+            m_internal->SetState(STATE_EXITED);
+
+            shouldResume = TRUE;
+        }
+    }
+
+    // is the thread paused?
+    if ( shouldResume || IsPaused() )
+        Resume();
+
+    // does is still run?
+    if ( IsRunning() )
+    {
+        if ( IsMain() )
+        {
+            // set flag for wxIsWaitingForThread()
+            gs_waitingForThread = TRUE;
+
+#if wxUSE_GUI
+            wxBeginBusyCursor();
+#endif // wxUSE_GUI
+        }
+
+        // ask the thread to terminate
+        {
+            wxCriticalSectionLocker lock(m_critsect);
+
+            m_internal->Cancel();
+        }
+
+#if wxUSE_GUI
+        // simply wait for the thread to terminate
+        while( TestDestroy() )
+        {
+            ::YieldToAnyThread() ;
+        }
+#else // !wxUSE_GUI
+        // simply wait for the thread to terminate
+        while( TestDestroy() )
+        {
+            ::YieldToAnyThread() ;
+        }
+#endif // wxUSE_GUI/!wxUSE_GUI
+
+        if ( IsMain() )
+        {
+            gs_waitingForThread = FALSE;
+
+#if wxUSE_GUI
+            wxEndBusyCursor();
+#endif // wxUSE_GUI
+        }
+    }
+
+ //   if ( !::GetExitCodeThread(hThread, (LPDWORD)&rc) )
+    {
+        wxLogLastError("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 therad 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;

 }
 
 }
 

-/* is this needed somewhere ?
-wxThread *wxThread::GetThreadFromID(unsigned long id)
+wxThreadError wxThread::Kill()

 {
 {

-    // TODO
-    return NULL;
+    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();
+
+    if ( IsDetached() )
+    {
+        delete this;
+    }
+
+    return wxTHREAD_NO_ERROR;

 }
 }

+
+void wxThread::Exit(ExitCode status)
+{
+    m_internal->Free();
+
+    if ( IsDetached() )
+    {
+        delete this;
+    }
+
+    m_internal->SetResult( status ) ;
+
+/*
+#if defined(__VISUALC__) || (defined(__BORLANDC__) && (__BORLANDC__ >= 0x500))
+    _endthreadex((unsigned)status);
+#else // !VC++
+    ::ExitThread((DWORD)status);
+#endif // VC++/!VC++

 */
 */

+    wxFAIL_MSG(wxT("Couldn't return from ExitThread()!"));
+}

 
 

-bool wxThread::IsAlive() const
+// priority setting
+// ----------------
+
+// since all these calls are execute cooperatively we don't have to use the critical section
+
+void wxThread::SetPriority(unsigned int prio)

 {
 {

-    // TODO
-    return FALSE;
+    m_internal->SetPriority(prio);

 }
 
 }
 

-bool wxThread::IsRunning() const
+unsigned int wxThread::GetPriority() const

 {
 {

-    // TODO
-    return FALSE;
+    return m_internal->GetPriority();

 }
 
 }
 

-bool wxThread::IsMain()
+unsigned long wxThread::GetId() const

 {
 {

-    // TODO
-    return FALSE;
+    return (unsigned long)m_internal->GetId();

 }
 
 }
 

-wxThread::wxThread()
+bool wxThread::IsRunning() const

 {
 {

-    p_internal = new wxThreadInternal();
+    return m_internal->GetState() == STATE_RUNNING;
+}

 
 

-    // TODO
+bool wxThread::IsAlive() const
+{
+    return (m_internal->GetState() == STATE_RUNNING) ||
+           (m_internal->GetState() == STATE_PAUSED);

 }
 
 }
 

-wxThread::~wxThread()
+bool wxThread::IsPaused() const

 {
 {

-    Destroy();
-    Join();
-    delete p_internal;
+    return m_internal->GetState() == STATE_PAUSED;

 }
 
 }
 

-// The default callback just joins the thread and throws away the result.
-void wxThread::OnExit()
+bool wxThread::TestDestroy()

 {
 {

-    Join();
+    return m_internal->GetState() == STATE_CANCELED;

 }
 
 }
 

-// Automatic initialization
-class wxThreadModule : public wxModule {
-  DECLARE_DYNAMIC_CLASS(wxThreadModule)
+// ----------------------------------------------------------------------------
+// Automatic initialization for thread module
+// ----------------------------------------------------------------------------
+
+class wxThreadModule : public wxModule
+{

 public:
 public:

-  virtual bool OnInit() {
-    /* TODO p_mainid = GetCurrentThread(); */
-    wxMainMutex = new wxMutex();
-    wxMainMutex->Lock();
-    return TRUE;
-  }
+    virtual bool OnInit();
+    virtual void OnExit();

 
 

-  // Global cleanup
-  virtual void OnExit() {
-    wxMainMutex->Unlock();
-    delete wxMainMutex;
-  }
+private:
+    DECLARE_DYNAMIC_CLASS(wxThreadModule)

 };
 
 IMPLEMENT_DYNAMIC_CLASS(wxThreadModule, wxModule)
 
 };
 
 IMPLEMENT_DYNAMIC_CLASS(wxThreadModule, wxModule)
 

+bool wxThreadModule::OnInit()
+{
+    long response;
+    bool hasThreadManager ;
+    hasThreadManager = Gestalt( gestaltThreadMgrAttr, &response) == noErr && response & 1;
+#if !TARGET_CARBON
+#if GENERATINGCFM
+    // verify presence of shared library
+    hasThreadManager = hasThreadManager && ((Ptr)NewThread != (Ptr)kUnresolvedCFragSymbolAddress);
+#endif
+#endif
+    if ( !hasThreadManager )
+    {
+        wxMessageBox( "Error" , "Thread Support is not available on this System" , wxOK ) ;
+        return FALSE ;
+    }
+
+    // no error return for GetCurrentThreadId()
+    MacGetCurrentThread( &gs_idMainThread ) ;
+
+    return TRUE;
+}
+
+void wxThreadModule::OnExit()
+{
+}
+
+// ----------------------------------------------------------------------------
+// under MacOS we don't have currently preemptive threads, so any thread may access
+// the GUI at any time
+// ----------------------------------------------------------------------------
+
+void WXDLLEXPORT wxMutexGuiEnter()
+{
+}
+
+void WXDLLEXPORT wxMutexGuiLeave()
+{
+}
+
+void WXDLLEXPORT wxMutexGuiLeaveOrEnter()
+{
+}
+
+bool WXDLLEXPORT wxGuiOwnedByMainThread()
+{
+    return false ;
+}
+
+// wake up the main thread
+void WXDLLEXPORT wxWakeUpMainThread()
+{
+    wxMacWakeUp() ;
+}
+
+bool WXDLLEXPORT wxIsWaitingForThread()
+{
+    return false ;
+}
+
+#include "wx/thrimpl.cpp"
+
+#endif // wxUSE_THREADS
+
+// vi:sts=4:sw=4:et