Changed name to wxFIXED_MINSIZE since that is more descriptive of what

[wxWidgets.git] / src / os2 / thread.cpp

diff --git a/src/os2/thread.cpp b/src/os2/thread.cpp
index a26fbf6e4ba7a6ce73b2b4ec06bb096a7739e837..738a99a758aaa36b3b0c0ea8710d37d244a5cc18 100644 (file)
--- a/src/os2/thread.cpp
+++ b/src/os2/thread.cpp
@@ -1,14 +1,19 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        thread.cpp
-// Purpose:     wxThread Implementation. For Unix ports, see e.g. src/gtk
-// Author:      Original from Wolfram Gloger/Guilhem Lavaux
-// Modified by: David Webster
+// Name:        src/os2/thread.cpp
+// Purpose:     wxThread Implementation
+// Author:      Original from Wolfram Gloger/Guilhem Lavaux/David Webster
+// Modified by: Stefan Neis

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

-// Copyright:   (c) Wolfram Gloger (1996, 1997); Guilhem Lavaux (1998)
+// Copyright:   (c) Stefan Neis (2003)
+//

 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 

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

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


@@ -20,15 +25,22 @@
 
 #include <stdio.h>
 
 
 #include <stdio.h>
 

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

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

+#include "wx/intl.h"
+#include "wx/utils.h"
+#include "wx/log.h"

 #include "wx/thread.h"
 
 #define INCL_DOSSEMAPHORES
 #define INCL_DOSPROCESS
 #include "wx/thread.h"
 
 #define INCL_DOSSEMAPHORES
 #define INCL_DOSPROCESS

+#define INCL_DOSMISC

 #define INCL_ERRORS
 #include <os2.h>
 #define INCL_ERRORS
 #include <os2.h>

+#ifndef __EMX__

 #include <bseerr.h>
 #include <bseerr.h>

-
+#endif

 // the possible states of the thread ("=>" shows all possible transitions from
 // this state)
 enum wxThreadState
 // the possible states of the thread ("=>" shows all possible transitions from
 // this state)
 enum wxThreadState


@@ -41,36 +53,36 @@ enum wxThreadState
 };
 
 // ----------------------------------------------------------------------------
 };
 
 // ----------------------------------------------------------------------------

-// static variables
+// this module's globals

 // ----------------------------------------------------------------------------
 
 // id of the main thread - the one which can call GUI functions without first
 // calling wxMutexGuiEnter()
 // ----------------------------------------------------------------------------
 
 // id of the main thread - the one which can call GUI functions without first
 // calling wxMutexGuiEnter()

-static ULONG                        s_ulIdMainThread = 0;
+static ULONG                        s_ulIdMainThread = 1;

 wxMutex*                            p_wxMainMutex;
 
 // OS2 substitute for Tls pointer the current parent thread object
 wxThread*                           m_pThread;    // pointer to the wxWindows thread object
 
 // if it's FALSE, some secondary thread is holding the GUI lock
 wxMutex*                            p_wxMainMutex;
 
 // OS2 substitute for Tls pointer the current parent thread object
 wxThread*                           m_pThread;    // pointer to the wxWindows thread object
 
 // if it's FALSE, some secondary thread is holding the GUI lock

-static bool s_bGuiOwnedByMainThread = TRUE;
+static bool gs_bGuiOwnedByMainThread = TRUE;

 
 // critical section which controls access to all GUI functions: any secondary
 // thread (i.e. except the main one) must enter this crit section before doing
 // any GUI calls
 
 // critical section which controls access to all GUI functions: any secondary
 // thread (i.e. except the main one) must enter this crit section before doing
 // any GUI calls

-static wxCriticalSection *s_pCritsectGui = NULL;
+static wxCriticalSection *gs_pCritsectGui = NULL;

 
 // critical section which protects s_nWaitingForGui variable
 
 // critical section which protects s_nWaitingForGui variable

-static wxCriticalSection *s_pCritsectWaitingForGui = NULL;
+static wxCriticalSection *gs_pCritsectWaitingForGui = NULL;

 
 // number of threads waiting for GUI in wxMutexGuiEnter()
 
 // number of threads waiting for GUI in wxMutexGuiEnter()

-static size_t s_nWaitingForGui = 0;
+static size_t gs_nWaitingForGui = 0;

 
 // are we waiting for a thread termination?
 
 // are we waiting for a thread termination?

-static bool s_bWaitingForThread = FALSE;
+static bool gs_bWaitingForThread = FALSE;

 
 // ============================================================================
 
 // ============================================================================

-// OS/2 implementation of thread classes
+// OS/2 implementation of thread and related classes

 // ============================================================================
 
 // ----------------------------------------------------------------------------
 // ============================================================================
 
 // ----------------------------------------------------------------------------


@@ -79,38 +91,56 @@ static bool s_bWaitingForThread = FALSE;
 class wxMutexInternal
 {
 public:
 class wxMutexInternal
 {
 public:

+    wxMutexInternal(wxMutexType mutexType);
+    ~wxMutexInternal();
+
+    bool IsOk() const { return m_vMutex != NULL; }
+
+    wxMutexError Lock() { return LockTimeout(SEM_INDEFINITE_WAIT); }
+    wxMutexError TryLock() { return LockTimeout(SEM_IMMEDIATE_RETURN); }
+    wxMutexError Unlock();
+
+private:
+    wxMutexError LockTimeout(ULONG ulMilliseconds);

     HMTX                            m_vMutex;
 };
 
     HMTX                            m_vMutex;
 };
 

-wxMutex::wxMutex()
+// all mutexes are "pseudo-"recursive under OS2 so we don't use mutexType
+// (Calls to DosRequestMutexSem and DosReleaseMutexSem can be nested, but
+//  the request count for a semaphore cannot exceed 65535. If an attempt is
+//  made to exceed this number, ERROR_TOO_MANY_SEM_REQUESTS is returned.)
+wxMutexInternal::wxMutexInternal(
+  wxMutexType                       WXUNUSED(eMutexType)
+)

 {
     APIRET                          ulrc;
 
 {
     APIRET                          ulrc;
 

-    p_internal = new wxMutexInternal;
-    ulrc = ::DosCreateMutexSem(NULL, &p_internal->m_vMutex, 0L, FALSE);
+    ulrc = ::DosCreateMutexSem(NULL, &m_vMutex, 0L, FALSE);

     if (ulrc != 0)
     {
         wxLogSysError(_("Can not create mutex."));
     if (ulrc != 0)
     {
         wxLogSysError(_("Can not create mutex."));

+        m_vMutex = NULL;

     }
     }

-    m_locked = 0;

 }
 
 }
 

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

 {
 {

-    if (m_locked > 0)
-        wxLogDebug(wxT("Warning: freeing a locked mutex (%d locks)."), m_locked);
-    ::DosCloseMutexSem(p_internal->m_vMutex);
-    p_internal->m_vMutex = NULL;
+    if (m_vMutex)
+    {
+        if (::DosCloseMutexSem(m_vMutex))
+            wxLogLastError(_T("DosCloseMutexSem(mutex)"));
+    }

 }
 
 }
 

-wxMutexError wxMutex::Lock()
+wxMutexError wxMutexInternal::LockTimeout(ULONG ulMilliseconds)

 {
     APIRET                          ulrc;
 
 {
     APIRET                          ulrc;
 

-    ulrc = ::DosRequestMutexSem(p_internal->m_vMutex, SEM_INDEFINITE_WAIT);
+    ulrc = ::DosRequestMutexSem(m_vMutex, ulMilliseconds);

 
     switch (ulrc)
     {
 
     switch (ulrc)
     {

+        case ERROR_TIMEOUT:

         case ERROR_TOO_MANY_SEM_REQUESTS:
             return wxMUTEX_BUSY;
 
         case ERROR_TOO_MANY_SEM_REQUESTS:
             return wxMUTEX_BUSY;
 


@@ -124,34 +154,18 @@ wxMutexError wxMutex::Lock()
             wxLogSysError(_("Couldn't acquire a mutex lock"));
             return wxMUTEX_MISC_ERROR;
 
             wxLogSysError(_("Couldn't acquire a mutex lock"));
             return wxMUTEX_MISC_ERROR;
 

-        case ERROR_TIMEOUT:

         default:
             wxFAIL_MSG(wxT("impossible return value in wxMutex::Lock"));
         default:
             wxFAIL_MSG(wxT("impossible return value in wxMutex::Lock"));

-    }
-    m_locked++;
-    return wxMUTEX_NO_ERROR;
-}
-
-wxMutexError wxMutex::TryLock()
-{
-    ULONG                           ulrc;
-
-    ulrc = ::DosRequestMutexSem(p_internal->m_vMutex, SEM_IMMEDIATE_RETURN /*0L*/);
-    if (ulrc == ERROR_TIMEOUT || ulrc == ERROR_TOO_MANY_SEM_REQUESTS)
-        return wxMUTEX_BUSY;
-
-    m_locked++;
+            return wxMUTEX_MISC_ERROR;
+     }

     return wxMUTEX_NO_ERROR;
 }
 
     return wxMUTEX_NO_ERROR;
 }
 

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

 {
     APIRET                          ulrc;
 
 {
     APIRET                          ulrc;
 

-    if (m_locked > 0)
-        m_locked--;
-
-    ulrc = ::DosReleaseMutexSem(p_internal->m_vMutex);
+    ulrc = ::DosReleaseMutexSem(m_vMutex);

     if (ulrc != 0)
     {
         wxLogSysError(_("Couldn't release a mutex"));
     if (ulrc != 0)
     {
         wxLogSysError(_("Couldn't release a mutex"));


@@ -160,83 +174,163 @@ wxMutexError wxMutex::Unlock()
     return wxMUTEX_NO_ERROR;
 }
 
     return wxMUTEX_NO_ERROR;
 }
 

-// ----------------------------------------------------------------------------
-// wxCondition implementation
-// ----------------------------------------------------------------------------
+// --------------------------------------------------------------------------
+// wxSemaphore
+// --------------------------------------------------------------------------

 
 

-class wxConditionInternal
+// a trivial wrapper around OS2 event semaphore
+class wxSemaphoreInternal

 {
 public:
 {
 public:

-    HEV                             m_vEvent;
-    int                             m_nWaiters;
+    wxSemaphoreInternal(int initialcount, int maxcount);
+    ~wxSemaphoreInternal();
+
+    bool IsOk() const { return m_vEvent != NULL; }
+
+    wxSemaError Wait() { return WaitTimeout(SEM_INDEFINITE_WAIT); }
+    wxSemaError TryWait() { return WaitTimeout(SEM_IMMEDIATE_RETURN); }
+    wxSemaError WaitTimeout(unsigned long milliseconds);
+
+    wxSemaError Post();
+
+private:
+    HEV m_vEvent;
+    HMTX m_vMutex;
+    int m_count;
+    int m_maxcount;

 };
 
 };
 

-wxCondition::wxCondition()
+wxSemaphoreInternal::wxSemaphoreInternal(int initialcount, int maxcount)

 {
 {

-    APIRET                          ulrc;
-    ULONG                           ulCount;
+    APIRET ulrc;
+    if ( maxcount == 0 )
+    {
+        // make it practically infinite
+        maxcount = INT_MAX;
+    }

 
 

-    p_internal = new wxConditionInternal;
-    ulrc = ::DosCreateEventSem(NULL, &p_internal->m_vEvent, 0L, FALSE);
+    m_count = initialcount;
+    m_maxcount = maxcount;
+    ulrc = ::DosCreateMutexSem(NULL, &m_vMutex, 0L, FALSE);

     if (ulrc != 0)
     {
     if (ulrc != 0)
     {

-        wxLogSysError(_("Can not create event object."));
+        wxLogLastError(_T("DosCreateMutexSem()"));
+        m_vMutex = NULL;
+        m_vEvent = NULL;
+        return;

     }
     }

-    p_internal->m_nWaiters = 0;
-    // ?? just for good measure?
-    ::DosResetEventSem(p_internal->m_vEvent, &ulCount);
-}
-
-wxCondition::~wxCondition()
-{
-    ::DosCloseEventSem(p_internal->m_vEvent);
-    delete p_internal;
-    p_internal = NULL;
-}
-
-void wxCondition::Wait(
-  wxMutex&                          rMutex
-)
-{
-    rMutex.Unlock();
-    p_internal->m_nWaiters++;
-    ::DosWaitEventSem(p_internal->m_vEvent, SEM_INDEFINITE_WAIT);
-    p_internal->m_nWaiters--;
-    rMutex.Lock();
+    ulrc = ::DosCreateEventSem(NULL, &m_vEvent, 0L, FALSE);
+    if ( ulrc != 0)
+    {
+        wxLogLastError(_T("DosCreateEventSem()"));
+        ::DosCloseMutexSem(m_vMutex);
+        m_vMutex = NULL;
+        m_vEvent = NULL;
+    }
+    if (initialcount)
+        ::DosPostEventSem(m_vEvent);

 }
 
 }
 

-bool wxCondition::Wait(
-  wxMutex&                          rMutex
-, unsigned long                     ulSec
-, unsigned long                     ulMillisec)
+wxSemaphoreInternal::~wxSemaphoreInternal()

 {
 {

-    APIRET                          ulrc;
-
-    rMutex.Unlock();
-    p_internal->m_nWaiters++;
-    ulrc = ::DosWaitEventSem(p_internal->m_vEvent, ULONG((ulSec * 1000L) + ulMillisec));
-    p_internal->m_nWaiters--;
-    rMutex.Lock();
-
-    return (ulrc != ERROR_TIMEOUT);
+    if ( m_vEvent )
+    {
+        if ( ::DosCloseEventSem(m_vEvent) )
+        {
+            wxLogLastError(_T("DosCloseEventSem(semaphore)"));
+        }
+        if ( ::DosCloseMutexSem(m_vMutex) )
+        {
+            wxLogLastError(_T("DosCloseMutexSem(semaphore)"));
+        }
+        else
+            m_vEvent = NULL;
+    }

 }
 
 }
 

-void wxCondition::Signal()
+wxSemaError wxSemaphoreInternal::WaitTimeout(unsigned long ulMilliseconds)

 {
 {

-    ::DosPostEventSem(p_internal->m_vEvent);
+    APIRET ulrc;
+    do {
+        ulrc = ::DosWaitEventSem(m_vEvent, ulMilliseconds );
+        switch ( ulrc )
+        {
+            case NO_ERROR:
+                break;
+
+            case ERROR_TIMEOUT:
+                if (ulMilliseconds == SEM_IMMEDIATE_RETURN)
+                    return wxSEMA_BUSY;
+                else
+                    return wxSEMA_TIMEOUT;
+
+            default:
+                wxLogLastError(_T("DosWaitEventSem(semaphore)"));
+                return wxSEMA_MISC_ERROR;
+        }
+        ulrc = :: DosRequestMutexSem(m_vMutex, ulMilliseconds);
+        switch ( ulrc )
+        {
+            case NO_ERROR:
+                // ok
+                break;
+
+            case ERROR_TIMEOUT:
+            case ERROR_TOO_MANY_SEM_REQUESTS:
+                if (ulMilliseconds == SEM_IMMEDIATE_RETURN)
+                    return wxSEMA_BUSY;
+                else
+                    return wxSEMA_TIMEOUT;
+
+            default:
+                wxFAIL_MSG(wxT("DosRequestMutexSem(mutex)"));
+                return wxSEMA_MISC_ERROR;
+        }
+        bool OK = false;
+        if (m_count > 0)
+        {
+            m_count--;
+            OK = true;
+        }
+        else
+        {
+            ULONG ulPostCount;
+            ::DosResetEventSem(m_vEvent, &ulPostCount);
+        }
+        ::DosReleaseMutexSem(m_vMutex);
+        if (OK)
+            return wxSEMA_NO_ERROR;
+    } while (ulMilliseconds == SEM_INDEFINITE_WAIT);
+
+    if (ulMilliseconds == SEM_IMMEDIATE_RETURN)
+        return wxSEMA_BUSY;
+    return wxSEMA_TIMEOUT;

 }
 
 }
 

-void wxCondition::Broadcast()
+wxSemaError wxSemaphoreInternal::Post()

 {
 {

-    int                             i;
-
-    for (i = 0; i < p_internal->m_nWaiters; i++)
+    APIRET ulrc;
+    ulrc = ::DosRequestMutexSem(m_vMutex, SEM_INDEFINITE_WAIT);
+    if (ulrc != NO_ERROR)
+        return wxSEMA_MISC_ERROR;
+    bool OK = false;
+    if (m_count < m_maxcount)

     {
     {

-        if (::DosPostEventSem(p_internal->m_vEvent) != 0)
-        {
-            wxLogSysError(_("Couldn't change the state of event object."));
-        }
+        m_count++;
+        ulrc = ::DosPostEventSem(m_vEvent);
+        OK = true;

     }
     }

+    ::DosReleaseMutexSem(m_vMutex);
+    if (!OK)
+        return wxSEMA_OVERFLOW;
+    if ( ulrc != NO_ERROR && ulrc != ERROR_ALREADY_POSTED )
+    {
+        wxLogLastError(_T("DosPostEventSem(semaphore)"));
+
+        return wxSEMA_MISC_ERROR;
+    }
+
+    return wxSEMA_NO_ERROR;

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


@@ -253,11 +347,18 @@ public:
     {
         m_hThread = 0;
         m_eState = STATE_NEW;
     {
         m_hThread = 0;
         m_eState = STATE_NEW;

-        m_nPriority = 0;
+        m_nPriority = WXTHREAD_DEFAULT_PRIORITY;
+    }
+
+    ~wxThreadInternal()
+    {
+        m_hThread = 0;

     }
 
     // create a new (suspended) thread (for the given thread object)
     }
 
     // create a new (suspended) thread (for the given thread object)

-    bool Create(wxThread* pThread);
+    bool Create( wxThread*    pThread
+                ,unsigned int uStackSize
+               );

 
     // suspend/resume/terminate
     bool Suspend();
 
     // suspend/resume/terminate
     bool Suspend();


@@ -269,7 +370,7 @@ public:
     inline wxThreadState GetState() const { return m_eState; }
 
     // thread priority
     inline wxThreadState GetState() const { return m_eState; }
 
     // thread priority

-    inline void SetPriority(unsigned int nPriority) { m_nPriority = nPriority; }
+    void                SetPriority(unsigned int nPriority);

     inline unsigned int GetPriority() const { return m_nPriority; }
 
     // thread handle and id
     inline unsigned int GetPriority() const { return m_nPriority; }
 
     // thread handle and id


@@ -277,7 +378,7 @@ public:
     TID  GetId() const { return m_hThread; }
 
     // thread function
     TID  GetId() const { return m_hThread; }
 
     // thread function

-    static DWORD OS2ThreadStart(wxThread *thread);
+    static void OS2ThreadStart(void* pParam);

 
 private:
     // Threads in OS/2 have only an ID, so m_hThread is both it's handle and ID
 
 private:
     // Threads in OS/2 have only an ID, so m_hThread is both it's handle and ID


@@ -288,69 +389,116 @@ private:
     unsigned int                    m_nPriority;  // thread priority in "wx" units
 };
 
     unsigned int                    m_nPriority;  // thread priority in "wx" units
 };
 

-ULONG wxThreadInternal::OS2ThreadStart(
-  wxThread*                         pThread
+void wxThreadInternal::OS2ThreadStart(
+  void * pParam

 )
 {
 )
 {

-    m_pThread = pThread;
+    DWORD                           dwRet;
+    bool bWasCancelled;

 
 

-    DWORD                           dwRet = (DWORD)pThread->Entry();
+    wxThread *pThread = (wxThread *)pParam;

 
 

-    pThread->p_internal->SetState(STATE_EXITED);
-    pThread->OnExit();
+    // first of all, wait for the thread to be started.
+    pThread->m_critsect.Enter();
+    pThread->m_critsect.Leave();
+    // Now check whether we hadn't been cancelled already and don't
+    // start the user code at all in this case.
+    if ( pThread->m_internal->GetState() == STATE_EXITED )
+    {
+        dwRet = (DWORD)-1;
+        bWasCancelled = TRUE;
+    }
+    else // do run thread
+    {
+        wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL;
+        unsigned long ulHab;
+        if (traits)
+            traits->InitializeGui(ulHab);
+        dwRet = (DWORD)pThread->Entry();
+        if (traits)
+            traits->TerminateGui(ulHab);

 
 

-    delete pThread;
-    m_pThread = NULL;
-    return dwRet;
-}
+        // enter m_critsect before changing the thread state
+        pThread->m_critsect.Enter();

 
 

-bool wxThreadInternal::Create(
-  wxThread*                         pThread
-)
-{
-    APIRET                          ulrc;
+        bWasCancelled = pThread->m_internal->GetState() == STATE_CANCELED;

 
 

-    ulrc = ::DosCreateThread( &m_hThread
-                             ,(PFNTHREAD)wxThreadInternal::OS2ThreadStart
-                             ,(ULONG)pThread
-                             ,CREATE_SUSPENDED | STACK_SPARSE
-                             ,8192L
-                            );
-    if(ulrc != 0)
-    {
-        wxLogSysError(_("Can't create thread"));
+        pThread->m_internal->SetState(STATE_EXITED);
+        pThread->m_critsect.Leave();
+    }
+    pThread->OnExit();

 
 

-        return FALSE;
+    // if the thread was cancelled (from Delete()), then it the handle is still
+    // needed there
+    if (pThread->IsDetached() && !bWasCancelled)
+    {
+        // auto delete
+        delete pThread;

     }
     }

+    //else: the joinable threads handle will be closed when Wait() is done
+    return;
+}

 
 

+void wxThreadInternal::SetPriority(
+  unsigned int                      nPriority
+)
+{

     // translate wxWindows priority to the PM one
     // translate wxWindows priority to the PM one

-    ULONG                           ulOS2_Priority;
-
-    if (m_nPriority <= 20)
-        ulOS2_Priority = PRTYC_NOCHANGE;
-    else if (m_nPriority <= 40)
-        ulOS2_Priority = PRTYC_IDLETIME;
-    else if (m_nPriority <= 60)
-        ulOS2_Priority = PRTYC_REGULAR;
-    else if (m_nPriority <= 80)
-        ulOS2_Priority = PRTYC_TIMECRITICAL;
+    ULONG                           ulOS2_PriorityClass;
+    ULONG                           ulOS2_SubPriority;
+    ULONG                           ulrc;
+
+    m_nPriority = nPriority;
+    if (m_nPriority <= 25)
+        ulOS2_PriorityClass = PRTYC_IDLETIME;
+    else if (m_nPriority <= 50)
+        ulOS2_PriorityClass = PRTYC_REGULAR;
+    else if (m_nPriority <= 75)
+        ulOS2_PriorityClass = PRTYC_TIMECRITICAL;

     else if (m_nPriority <= 100)
     else if (m_nPriority <= 100)

-        ulOS2_Priority = PRTYC_FOREGROUNDSERVER;
+        ulOS2_PriorityClass = PRTYC_FOREGROUNDSERVER;

     else
     {
         wxFAIL_MSG(wxT("invalid value of thread priority parameter"));
     else
     {
         wxFAIL_MSG(wxT("invalid value of thread priority parameter"));

-        ulOS2_Priority = PRTYC_REGULAR;
+        ulOS2_PriorityClass = PRTYC_REGULAR;

     }
     }

+    ulOS2_SubPriority = (ULONG) (((m_nPriority - 1) % 25 + 1) * 31.0 / 25);

     ulrc = ::DosSetPriority( PRTYS_THREAD
     ulrc = ::DosSetPriority( PRTYS_THREAD

-                            ,ulOS2_Priority
-                            ,0
+                            ,ulOS2_PriorityClass
+                            ,ulOS2_SubPriority

                             ,(ULONG)m_hThread
                            );
     if (ulrc != 0)
     {
         wxLogSysError(_("Can't set thread priority"));
     }
                             ,(ULONG)m_hThread
                            );
     if (ulrc != 0)
     {
         wxLogSysError(_("Can't set thread priority"));
     }

-    return TRUE;
+}
+
+bool wxThreadInternal::Create(
+  wxThread*                         pThread
+, unsigned int                      uStackSize
+)
+{
+    int                          tid;
+
+    if (!uStackSize)
+      uStackSize = 131072;
+    pThread->m_critsect.Enter();
+    tid = _beginthread(wxThreadInternal::OS2ThreadStart,
+                             NULL, uStackSize, pThread);
+    if(tid == -1)
+    {
+        wxLogSysError(_("Can't create thread"));
+
+        return FALSE;
+    }
+    m_hThread = tid;
+    if (m_nPriority != WXTHREAD_DEFAULT_PRIORITY)
+    {
+        SetPriority(m_nPriority);
+    }
+
+    return(TRUE);

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


@@ -372,10 +520,18 @@ bool wxThreadInternal::Resume()
 
     if (ulrc != 0)
     {
 
     if (ulrc != 0)
     {

-        wxLogSysError(_("Can not suspend thread %lu"), m_hThread);
+        wxLogSysError(_("Can not resume thread %lu"), m_hThread);

         return FALSE;
     }
         return FALSE;
     }

-    m_eState = STATE_PAUSED;
+
+    // don't change the state from STATE_EXITED because it's special and means
+    // we are going to terminate without running any user code - if we did it,
+    // the codei n Delete() wouldn't work
+    if ( m_eState != STATE_EXITED )
+    {
+        m_eState = STATE_RUNNING;
+    }
+

     return TRUE;
 }
 
     return TRUE;
 }
 


@@ -416,12 +572,65 @@ void wxThread::Sleep(
     ::DosSleep(ulMilliseconds);
 }
 
     ::DosSleep(ulMilliseconds);
 }
 

+int wxThread::GetCPUCount()
+{
+    ULONG CPUCount;
+    APIRET ulrc;
+    ulrc = ::DosQuerySysInfo(26, 26, (void *)&CPUCount, sizeof(ULONG));
+    // QSV_NUMPROCESSORS(26) is typically not defined in header files
+
+    if (ulrc != 0)
+        CPUCount = 1;
+
+    return CPUCount;
+}
+
+unsigned long wxThread::GetCurrentId()
+{
+    PTIB                            ptib;
+    PPIB                            ppib;
+
+    ::DosGetInfoBlocks(&ptib, &ppib);
+    return (unsigned long) ptib->tib_ptib2->tib2_ultid;
+}
+
+bool wxThread::SetConcurrency(size_t level)
+{
+    wxASSERT_MSG( IsMain(), _T("should only be called from the main thread") );
+
+    // ok only for the default one
+    if ( level == 0 )
+        return 0;
+
+    // Don't know how to realize this on OS/2.
+    return level == 1;
+}
+
+// ctor and dtor
+// -------------
+
+wxThread::wxThread(wxThreadKind kind)
+{
+    m_internal = new wxThreadInternal();
+
+    m_isDetached = kind == wxTHREAD_DETACHED;
+}
+
+wxThread::~wxThread()
+{
+    delete m_internal;
+}
+

 // create/start thread
 // -------------------
 
 // create/start thread
 // -------------------
 

-wxThreadError wxThread::Create()
+wxThreadError wxThread::Create(
+  unsigned int                      uStackSize
+)

 {
 {

-    if ( !p_internal->Create(this) )
+    wxCriticalSectionLocker lock((wxCriticalSection &)m_critsect);
+
+    if ( !m_internal->Create(this, uStackSize) )

         return wxTHREAD_NO_RESOURCE;
 
     return wxTHREAD_NO_ERROR;
         return wxTHREAD_NO_RESOURCE;
 
     return wxTHREAD_NO_ERROR;


@@ -431,7 +640,7 @@ wxThreadError wxThread::Run()
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 

-    if ( p_internal->GetState() != STATE_NEW )
+    if ( m_internal->GetState() != STATE_NEW )

     {
         // actually, it may be almost any state at all, not only STATE_RUNNING
         return wxTHREAD_RUNNING;
     {
         // actually, it may be almost any state at all, not only STATE_RUNNING
         return wxTHREAD_RUNNING;


@@ -446,102 +655,194 @@ wxThreadError wxThread::Pause()
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 

-    return p_internal->Suspend() ? wxTHREAD_NO_ERROR : wxTHREAD_MISC_ERROR;
+    return m_internal->Suspend() ? wxTHREAD_NO_ERROR : wxTHREAD_MISC_ERROR;

 }
 
 wxThreadError wxThread::Resume()
 {
 }
 
 wxThreadError wxThread::Resume()
 {

+    if (m_internal->GetState() == STATE_NEW)
+    {
+        m_internal->SetState(STATE_RUNNING);
+        m_critsect.Leave();
+        return wxTHREAD_NO_ERROR;
+    }
+

     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 

-    return p_internal->Resume() ? wxTHREAD_NO_ERROR : wxTHREAD_MISC_ERROR;
+    return m_internal->Resume() ? wxTHREAD_NO_ERROR : wxTHREAD_MISC_ERROR;

 }
 
 // stopping thread
 // ---------------
 
 }
 
 // stopping thread
 // ---------------
 

-wxThread::ExitCode wxThread::Delete()
+wxThread::ExitCode wxThread::Wait()

 {
 {

-    ExitCode                        rc = 0;
-    ULONG                           ulrc;
+    // although under Windows we can wait for any thread, it's an error to
+    // wait for a detached one in wxWin API
+    wxCHECK_MSG( !IsDetached(), (ExitCode)-1,
+                 _T("can't wait for detached thread") );
+    ExitCode rc = (ExitCode)-1;
+    (void)Delete(&rc);
+    return(rc);
+}
+
+wxThreadError wxThread::Delete(ExitCode *pRc)
+{
+    ExitCode rc = 0;

 
     // Delete() is always safe to call, so consider all possible states
 
     // Delete() is always safe to call, so consider all possible states

-    if (IsPaused())
+
+    // we might need to resume the thread, but we might also not need to cancel
+    // it if it doesn't run yet
+    bool shouldResume = FALSE,
+         shouldCancel = TRUE,
+         isRunning = FALSE;
+
+    // check if the thread already started to run
+    {
+        wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
+
+        if ( m_internal->GetState() == STATE_NEW )
+        {
+            // WinThreadStart() will see it and terminate immediately, no need
+            // to cancel the thread - but we still need to resume it to let it
+            // run
+            m_internal->SetState(STATE_EXITED);
+
+            Resume();   // it knows about STATE_EXITED special case
+
+            shouldCancel = FALSE;
+            isRunning = TRUE;
+
+            // shouldResume is correctly set to FALSE here
+        }
+        else
+        {
+            shouldResume = IsPaused();
+        }
+    }
+
+    // resume the thread if it is paused
+    if ( shouldResume )

         Resume();
 
         Resume();
 

-    if (IsRunning())
+    TID                             hThread = m_internal->GetHandle();
+
+    if ( isRunning || IsRunning())

     {
         if (IsMain())
         {
             // set flag for wxIsWaitingForThread()
     {
         if (IsMain())
         {
             // set flag for wxIsWaitingForThread()

-            s_bWaitingForThread = TRUE;
-            wxBeginBusyCursor();
+            gs_bWaitingForThread = TRUE;

         }
 
         }
 

-        TID                         hThread;
-
+        // ask the thread to terminate
+        if ( shouldCancel )

         {
         {

-            wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
+            wxCriticalSectionLocker lock(m_critsect);

 
 

-            p_internal->Cancel();
-            hThread = p_internal->GetHandle();
+            m_internal->Cancel();

         }
 
         }
 

+#if 0

         // 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
         // we can't just wait for the thread to terminate because it might be
         // calling some GUI functions and so it will never terminate before we
         // process the Windows messages that result from these functions

-
+        DWORD result = 0;       // suppress warnings from broken compilers

         do
         {
         do
         {

-            ulrc = ::DosWaitThread( &hThread
-                                   ,DCWW_NOWAIT
-                                  );
-            switch (ulrc)
+            if ( IsMain() )

             {
             {

-                case ERROR_INTERRUPT:
-                case ERROR_INVALID_THREADID:
-                    // error
-                    wxLogSysError(_("Can not wait for thread termination"));
-                    Kill();
-                    return (ExitCode)-1;
+                // give the thread we're waiting for chance to do the GUI call
+                // it might be in
+                if ( (gs_nWaitingForGui > 0) && wxGuiOwnedByMainThread() )
+                {
+                    wxMutexGuiLeave();
+                }
+            }

 
 

-                case 0:
-                    // thread we're waiting for terminated
-                    break;
+            result = ::DosWaitThread(&hThread, DCWW_NOWAIT);
+            // FIXME: We ought to have a message processing loop here!!

 
 

+            switch ( result )
+            {
+                case ERROR_INTERRUPT:

                 case ERROR_THREAD_NOT_TERMINATED:
                 case ERROR_THREAD_NOT_TERMINATED:

-                    // new message arrived, process it
-                    if (!wxTheApp->DoMessage())
-                    {
-                        // WM_QUIT received: kill the thread
-                        Kill();
-                        return (ExitCode)-1;
-                    }
-                    if (IsMain())
-                    {
-                        // give the thread we're waiting for chance to exit
-                        // from the GUI call it might have been in
-                        if ((s_nWaitingForGui > 0) && wxGuiOwnedByMainThread())
-                        {
-                            wxMutexGuiLeave();
-                        }
-                    }

                     break;
                     break;

-
+                case ERROR_INVALID_THREADID:
+                case NO_ERROR:
+                    // thread we're waiting for just terminated
+                    // or even does not exist any more.
+                    result = NO_ERROR;
+                    break;

                 default:
                 default:

-                    wxFAIL_MSG(wxT("unexpected result of DosWatiThread"));
+                    wxFAIL_MSG(wxT("unexpected result of DosWaitThread"));
+            }
+            if ( IsMain() )
+            {
+                // event processing - needed if we are the main thread
+                // to give other threads a chance to do remaining GUI
+                // processing and terminate cleanly.
+                wxTheApp->HandleSockets();
+                if (wxTheApp->Pending())
+                  if ( !wxTheApp->DoMessage() )
+                  {
+                      // WM_QUIT received: kill the thread
+                      Kill();
+
+                      return wxTHREAD_KILLED;
+                  }
+                  else
+                    wxUsleep(10);

             }
             }

-        } while (ulrc != 0);
+            else
+                wxUsleep(10);
+        } while ( result != NO_ERROR );
+#else // !wxUSE_GUI
+        // simply wait for the thread to terminate
+        //
+        // OTOH, even console apps create windows (in wxExecute, for WinSock
+        // &c), so may be use MsgWaitForMultipleObject() too here?
+        if ( ::DosWaitThread(&hThread, DCWW_WAIT) != NO_ERROR )
+        {
+            wxFAIL_MSG(wxT("unexpected result of DosWaitThread"));
+        }
+#endif // wxUSE_GUI/!wxUSE_GUI

 
 

-        if (IsMain())
+        if ( IsMain() )

         {
         {

-            s_bWaitingForThread = FALSE;
-            wxEndBusyCursor();
+            gs_bWaitingForThread = FALSE;

         }
         }

+    }
+
+#if 0
+    // although the thread might be already in the EXITED state it might not
+    // have terminated yet and so we are not sure that it has actually
+    // terminated if the "if" above hadn't been taken
+    do
+    {
+        if ( !::GetExitCodeThread(hThread, (LPDWORD)&rc) )
+        {
+            wxLogLastError(wxT("GetExitCodeThread"));
+
+            rc = (ExitCode)-1;
+        }
+    } while ( (DWORD)rc == STILL_ACTIVE );
+#endif

 
 

-        ::DosExit(EXIT_THREAD, ulrc);
+    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;

     }
     }

-    rc = (ExitCode)ulrc;
-    return rc;
+
+    if ( pRc )
+        *pRc = rc;
+
+    return rc == (ExitCode)-1 ? wxTHREAD_MISC_ERROR : wxTHREAD_NO_ERROR;

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


@@ -549,17 +850,20 @@ wxThreadError wxThread::Kill()
     if (!IsRunning())
         return wxTHREAD_NOT_RUNNING;
 
     if (!IsRunning())
         return wxTHREAD_NOT_RUNNING;
 

-    ::DosKillThread(p_internal->GetHandle());
-    delete this;
+    ::DosKillThread(m_internal->GetHandle());
+    if (IsDetached())
+    {
+        delete this;
+    }

     return wxTHREAD_NO_ERROR;
 }
 
 void wxThread::Exit(
     return wxTHREAD_NO_ERROR;
 }
 
 void wxThread::Exit(

-  void*                             pStatus
+  ExitCode                          pStatus

 )
 {
     delete this;
 )
 {
     delete this;

-    ::DosExit(EXIT_THREAD, ULONG(pStatus));
+    _endthread();

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


@@ -569,60 +873,50 @@ void wxThread::SetPriority(
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 

-    p_internal->SetPriority(nPrio);
+    m_internal->SetPriority(nPrio);

 }
 
 unsigned int wxThread::GetPriority() const
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
 }
 
 unsigned int wxThread::GetPriority() const
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 

-    return p_internal->GetPriority();
+    return m_internal->GetPriority();

 }
 
 }
 

-unsigned long wxThread::GetID() const
+unsigned long wxThread::GetId() const

 {
 {

-    wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
+    wxCriticalSectionLocker lock((wxCriticalSection &)m_critsect); // const_cast

 
 

-    return (unsigned long)p_internal->GetId();
+    return (unsigned long)m_internal->GetId();

 }
 
 bool wxThread::IsRunning() const
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
 }
 
 bool wxThread::IsRunning() const
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 

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

 }
 
 bool wxThread::IsAlive() const
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
 }
 
 bool wxThread::IsAlive() const
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 

-    return (p_internal->GetState() == STATE_RUNNING) ||
-           (p_internal->GetState() == STATE_PAUSED);
+    return (m_internal->GetState() == STATE_RUNNING) ||
+           (m_internal->GetState() == STATE_PAUSED);

 }
 
 bool wxThread::IsPaused() const
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
 }
 
 bool wxThread::IsPaused() const
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 

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

 }
 
 bool wxThread::TestDestroy()
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 
 }
 
 bool wxThread::TestDestroy()
 {
     wxCriticalSectionLocker         lock((wxCriticalSection &)m_critsect);
 

-    return p_internal->GetState() == STATE_CANCELED;
-}
-
-wxThread::wxThread()
-{
-    p_internal = new wxThreadInternal();
-}
-
-wxThread::~wxThread()
-{
-    delete p_internal;
+    return m_internal->GetState() == STATE_CANCELED;

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


@@ -643,10 +937,10 @@ IMPLEMENT_DYNAMIC_CLASS(wxThreadModule, wxModule)
 
 bool wxThreadModule::OnInit()
 {
 
 bool wxThreadModule::OnInit()
 {

-    s_pCritsectWaitingForGui = new wxCriticalSection();
+    gs_pCritsectWaitingForGui = new wxCriticalSection();

 
 

-    s_pCritsectGui = new wxCriticalSection();
-    s_pCritsectGui->Enter();
+    gs_pCritsectGui = new wxCriticalSection();
+    gs_pCritsectGui->Enter();

 
     PTIB                            ptib;
     PPIB                            ppib;
 
     PTIB                            ptib;
     PPIB                            ppib;


@@ -659,45 +953,78 @@ bool wxThreadModule::OnInit()
 
 void wxThreadModule::OnExit()
 {
 
 void wxThreadModule::OnExit()
 {

-    if (s_pCritsectGui)
+    if (gs_pCritsectGui)

     {
     {

-        s_pCritsectGui->Leave();
-        delete s_pCritsectGui;
-        s_pCritsectGui = NULL;
+        gs_pCritsectGui->Leave();
+#if (!(defined(__VISAGECPP__) && (__IBMCPP__ < 400 || __IBMC__ < 400 )))
+        delete gs_pCritsectGui;
+#endif
+        gs_pCritsectGui = NULL;

     }
 
     }
 

-    wxDELETE(s_pCritsectWaitingForGui);
+#if (!(defined(__VISAGECPP__) && (__IBMCPP__ < 400 || __IBMC__ < 400 )))
+    wxDELETE(gs_pCritsectWaitingForGui);
+#endif

 }
 
 // ----------------------------------------------------------------------------
 // Helper functions
 // ----------------------------------------------------------------------------
 
 }
 
 // ----------------------------------------------------------------------------
 // Helper functions
 // ----------------------------------------------------------------------------
 

-// Does nothing under OS/2 [for now]
+// wake up the main thread if it's in ::GetMessage()

 void WXDLLEXPORT wxWakeUpMainThread()
 {
 void WXDLLEXPORT wxWakeUpMainThread()
 {

+#if 0
+    if ( !::WinPostQueueMsg(wxTheApp->m_hMq, WM_NULL, 0, 0) )
+    {
+        // should never happen
+        wxLogLastError(wxT("WinPostMessage(WM_NULL)"));
+    }
+#endif
+}
+
+void WXDLLEXPORT wxMutexGuiEnter()
+{
+    // this would dead lock everything...
+    wxASSERT_MSG( !wxThread::IsMain(),
+                  wxT("main thread doesn't want to block in wxMutexGuiEnter()!") );
+
+    // the order in which we enter the critical sections here is crucial!!
+
+    // set the flag telling to the main thread that we want to do some GUI
+    {
+        wxCriticalSectionLocker enter(*gs_pCritsectWaitingForGui);
+
+        gs_nWaitingForGui++;
+    }
+
+    wxWakeUpMainThread();
+
+    // now we may block here because the main thread will soon let us in
+    // (during the next iteration of OnIdle())
+    gs_pCritsectGui->Enter();

 }
 
 void WXDLLEXPORT wxMutexGuiLeave()
 {
 }
 
 void WXDLLEXPORT wxMutexGuiLeave()
 {

-    wxCriticalSectionLocker enter(*s_pCritsectWaitingForGui);
+    wxCriticalSectionLocker enter(*gs_pCritsectWaitingForGui);

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

-        s_bGuiOwnedByMainThread = FALSE;
+        gs_bGuiOwnedByMainThread = FALSE;

     }
     else
     {
         // decrement the number of waiters now
     }
     else
     {
         // decrement the number of waiters now

-        wxASSERT_MSG( s_nWaitingForGui > 0,
+        wxASSERT_MSG(gs_nWaitingForGui > 0,

                       wxT("calling wxMutexGuiLeave() without entering it first?") );
 
                       wxT("calling wxMutexGuiLeave() without entering it first?") );
 

-        s_nWaitingForGui--;
+        gs_nWaitingForGui--;

 
         wxWakeUpMainThread();
     }
 
 
         wxWakeUpMainThread();
     }
 

-    s_pCritsectGui->Leave();
+    gs_pCritsectGui->Leave();

 }
 
 void WXDLLEXPORT wxMutexGuiLeaveOrEnter()
 }
 
 void WXDLLEXPORT wxMutexGuiLeaveOrEnter()


@@ -705,17 +1032,17 @@ void WXDLLEXPORT wxMutexGuiLeaveOrEnter()
     wxASSERT_MSG( wxThread::IsMain(),
                   wxT("only main thread may call wxMutexGuiLeaveOrEnter()!") );
 
     wxASSERT_MSG( wxThread::IsMain(),
                   wxT("only main thread may call wxMutexGuiLeaveOrEnter()!") );
 

-    wxCriticalSectionLocker enter(*s_pCritsectWaitingForGui);
+    wxCriticalSectionLocker enter(*gs_pCritsectWaitingForGui);

 
 

-    if ( s_nWaitingForGui == 0 )
+    if (gs_nWaitingForGui == 0)

     {
         // no threads are waiting for GUI - so we may acquire the lock without
         // any danger (but only if we don't already have it)
         if (!wxGuiOwnedByMainThread())
         {
     {
         // no threads are waiting for GUI - so we may acquire the lock without
         // any danger (but only if we don't already have it)
         if (!wxGuiOwnedByMainThread())
         {

-            s_pCritsectGui->Enter();
+            gs_pCritsectGui->Enter();

 
 

-            s_bGuiOwnedByMainThread = TRUE;
+            gs_bGuiOwnedByMainThread = TRUE;

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


@@ -732,13 +1059,19 @@ void WXDLLEXPORT wxMutexGuiLeaveOrEnter()
 
 bool WXDLLEXPORT wxGuiOwnedByMainThread()
 {
 
 bool WXDLLEXPORT wxGuiOwnedByMainThread()
 {

-    return s_bGuiOwnedByMainThread;
+    return gs_bGuiOwnedByMainThread;

 }
 
 bool WXDLLEXPORT wxIsWaitingForThread()
 {
 }
 
 bool WXDLLEXPORT wxIsWaitingForThread()
 {

-    return s_bWaitingForThread;
+    return gs_bWaitingForThread;

 }
 
 }
 

+// ----------------------------------------------------------------------------
+// include common implementation code
+// ----------------------------------------------------------------------------
+
+#include "wx/thrimpl.cpp"
+

 #endif
   // wxUSE_THREADS
 #endif
   // wxUSE_THREADS