fixed incorrect GetTextExtent for wxTELETYPE font

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

diff --git a/src/msw/thread.cpp b/src/msw/thread.cpp
index 21682d45a5cd0312edaeff403796c7e08df81448..66efdf36ac33b01ec87a1a4c6c68611cebeef763 100644 (file)
--- a/src/msw/thread.cpp
+++ b/src/msw/thread.cpp
@@ -26,7 +26,7 @@
 #endif
 
 #ifndef WX_PRECOMP
 #endif
 
 #ifndef WX_PRECOMP

-    #include "wx/wx.h"
+#    include "wx/wx.h"

 #endif
 
 #if wxUSE_THREADS
 #endif
 
 #if wxUSE_THREADS


@@ -36,16 +36,27 @@
 #include "wx/module.h"
 #include "wx/thread.h"
 
 #include "wx/module.h"
 #include "wx/thread.h"
 

+#ifdef Yield
+#    undef Yield
+#endif
+

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

-#if defined(__VISUALC__) || (defined(__BORLANDC__) && (__BORLANDC__ >= 0x500))
+#if defined(__VISUALC__) || \
+    (defined(__BORLANDC__) && (__BORLANDC__ >= 0x500)) || \
+    (defined(__GNUG__) && defined(__MSVCRT__))

 
 #if defined(__BORLANDC__) && !defined(__MT__)
 // I can't set -tWM in the IDE (anyone?) so have to do this
 #define __MT__
 
 #if defined(__BORLANDC__) && !defined(__MT__)
 // I can't set -tWM in the IDE (anyone?) so have to do this
 #define __MT__

+#endif
+
+#if defined(__BORLANDC__) && !defined(__MFC_COMPAT__)
+// Needed to know about _beginthreadex etc..
+#define __MFC_COMPAT__

 #endif
 
     #include <process.h>
 #endif
 
     #include <process.h>


@@ -200,44 +211,78 @@ class wxConditionInternal
 public:
     wxConditionInternal()
     {
 public:
     wxConditionInternal()
     {

-        event = ::CreateEvent(
-                              NULL,   // default secutiry
-                              FALSE,  // not manual reset
-                              FALSE,  // nonsignaled initially
-                              NULL    // nameless event
-                             );
-        if ( !event )
+        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."));
         }
         {
             wxLogSysError(_("Can not create event object."));
         }

-        waiters = 0;
+
+        // nobody waits for us yet
+        m_nWaiters = 0;

     }
 
     bool Wait(DWORD timeout)
     {
     }
 
     bool Wait(DWORD timeout)
     {

-        waiters++;
+        // 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);

 
 

-        // FIXME this should be MsgWaitForMultipleObjects() as well probably
-        DWORD rc = ::WaitForSingleObject(event, timeout);
+        // 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);

 
 

-        waiters--;
+        ::InterlockedDecrement(&m_nWaiters);

 
         return rc != WAIT_TIMEOUT;
     }
 
 
         return rc != WAIT_TIMEOUT;
     }
 

+    void Signal()
+    {
+        // 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"));
+        }
+    }
+
+    void Broadcast()
+    {
+        // 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();
+        }
+    }
+

     ~wxConditionInternal()
     {
     ~wxConditionInternal()
     {

-        if ( event )
+        if ( m_hEvent )

         {
         {

-            if ( !::CloseHandle(event) )
+            if ( !::CloseHandle(m_hEvent) )

             {
             {

-                wxLogLastError("CloseHandle(event)");
+                wxLogLastError(wxT("CloseHandle(event)"));

             }
         }
     }
 
             }
         }
     }
 

-    HANDLE event;
-    int waiters;
+private:
+    // the Win32 synchronization object corresponding to this event
+    HANDLE m_hEvent;
+
+    // number of threads waiting for this condition
+    LONG m_nWaiters;

 };
 
 wxCondition::wxCondition()
 };
 
 wxCondition::wxCondition()


@@ -263,26 +308,12 @@ bool wxCondition::Wait(unsigned long sec,
 
 void wxCondition::Signal()
 {
 
 void wxCondition::Signal()
 {

-    // 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_internal->event) )
-    {
-        wxLogLastError("SetEvent");
-    }
+    m_internal->Signal();

 }
 
 void wxCondition::Broadcast()
 {
 }
 
 void wxCondition::Broadcast()
 {

-    // 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 ( int i = 0; i < m_internal->waiters; i++ )
-    {
-        Signal();
-    }
+    m_internal->Broadcast();

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


@@ -340,7 +371,7 @@ public:
         {
             if ( !::CloseHandle(m_hThread) )
             {
         {
             if ( !::CloseHandle(m_hThread) )
             {

-                wxLogLastError("CloseHandle(thread)");
+                wxLogLastError(wxT("CloseHandle(thread)"));

             }
 
             m_hThread = 0;
             }
 
             m_hThread = 0;


@@ -379,31 +410,38 @@ private:
 
 DWORD wxThreadInternal::WinThreadStart(wxThread *thread)
 {
 
 DWORD wxThreadInternal::WinThreadStart(wxThread *thread)
 {

-    // first of all, check whether we hadn't been cancelled already
+    DWORD rc;
+    bool wasCancelled;
+
+    // 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 )
     {
     if ( thread->m_internal->GetState() == STATE_EXITED )
     {

-        return (DWORD)-1;
+        rc = (DWORD)-1;
+        wasCancelled = TRUE;

     }
     }

-
-    // store the thread object in the TLS
-    if ( !::TlsSetValue(gs_tlsThisThread, thread) )
+    else // do run thread

     {
     {

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

 
 

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

 
 

-    DWORD rc = (DWORD)thread->Entry();
+        rc = (DWORD)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();
+        // enter m_critsect before changing the thread state
+        thread->m_critsect.Enter();
+        wasCancelled = thread->m_internal->GetState() == STATE_CANCELED;
+        thread->m_internal->SetState(STATE_EXITED);
+        thread->m_critsect.Leave();
+    }

 
     thread->OnExit();
 
 
     thread->OnExit();
 

-    // if the thread was cancelled (from Delete()), then it the handle is still
+    // if the thread was cancelled (from Delete()), then its handle is still

     // needed there
     if ( thread->IsDetached() && !wasCancelled )
     {
     // needed there
     if ( thread->IsDetached() && !wasCancelled )
     {


@@ -448,7 +486,9 @@ bool wxThreadInternal::Create(wxThread *thread)
     // 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)
     // 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))
+#if defined(__VISUALC__) || \
+    (defined(__BORLANDC__) && (__BORLANDC__ >= 0x500)) || \
+    (defined(__GNUG__) && defined(__MSVCRT__))

     typedef unsigned (__stdcall *RtlThreadStart)(void *);
 
     m_hThread = (HANDLE)_beginthreadex(NULL, 0,
     typedef unsigned (__stdcall *RtlThreadStart)(void *);
 
     m_hThread = (HANDLE)_beginthreadex(NULL, 0,


@@ -456,7 +496,7 @@ bool wxThreadInternal::Create(wxThread *thread)
                                        wxThreadInternal::WinThreadStart,
                                        thread, CREATE_SUSPENDED,
                                        (unsigned int *)&m_tid);
                                        wxThreadInternal::WinThreadStart,
                                        thread, CREATE_SUSPENDED,
                                        (unsigned int *)&m_tid);

-#else // !VC++
+#else // compiler doesn't have _beginthreadex

     m_hThread = ::CreateThread
                   (
                     NULL,                               // default security
     m_hThread = ::CreateThread
                   (
                     NULL,                               // default security


@@ -467,7 +507,7 @@ bool wxThreadInternal::Create(wxThread *thread)
                     CREATE_SUSPENDED,                   // flags
                     &m_tid                              // [out] thread id
                   );
                     CREATE_SUSPENDED,                   // flags
                     &m_tid                              // [out] thread id
                   );

-#endif // VC++/!VC++
+#endif // _beginthreadex/CreateThread

 
     if ( m_hThread == NULL )
     {
 
     if ( m_hThread == NULL )
     {


@@ -509,7 +549,13 @@ bool wxThreadInternal::Resume()
         return FALSE;
     }
 
         return FALSE;
     }
 

-    m_state = STATE_RUNNING;
+    // 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_state != STATE_EXITED )
+    {
+        m_state = STATE_RUNNING;
+    }

 
     return TRUE;
 }
 
     return TRUE;
 }


@@ -632,18 +678,12 @@ bool wxThread::SetConcurrency(size_t level)
         if ( hModKernel )
         {
             pfnSetProcessAffinityMask = (SETPROCESSAFFINITYMASK)
         if ( hModKernel )
         {
             pfnSetProcessAffinityMask = (SETPROCESSAFFINITYMASK)

-                ::GetProcAddress(hModKernel,
-#if defined(__BORLANDC__) && (__BORLANDC__ <= 0x520)
-                                 "SetProcessAffinityMask");
-#else
-                                 _T("SetProcessAffinityMask"));
-#endif
+                ::GetProcAddress(hModKernel, "SetProcessAffinityMask");

         }
 
         // we've discovered a MT version of Win9x!
         wxASSERT_MSG( pfnSetProcessAffinityMask,
         }
 
         // we've discovered a MT version of Win9x!
         wxASSERT_MSG( pfnSetProcessAffinityMask,

-                      _T("this system has several CPUs but no "
-                         "SetProcessAffinityMask function?") );
+                      _T("this system has several CPUs but no SetProcessAffinityMask function?") );

     }
 
     if ( !pfnSetProcessAffinityMask )
     }
 
     if ( !pfnSetProcessAffinityMask )


@@ -746,29 +786,44 @@ wxThreadError wxThread::Delete(ExitCode *pRc)
 
     // Delete() is always safe to call, so consider all possible states
 
 
     // Delete() is always safe to call, so consider all possible states
 

-    // has the thread started to run?
-    bool shouldResume = FALSE;
+    // 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 )
         {
     {
         wxCriticalSectionLocker lock(m_critsect);
 
         if ( m_internal->GetState() == STATE_NEW )
         {

-            // WinThreadStart() will see it and terminate immediately
+            // 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);
 
             m_internal->SetState(STATE_EXITED);
 

-            shouldResume = TRUE;
+            Resume();   // it knows about STATE_EXITED special case
+
+            shouldCancel = FALSE;
+            isRunning = TRUE;
+
+            // shouldResume is correctly set to FALSE here
+        }
+        else
+        {
+            shouldResume = IsPaused();

         }
     }
 
         }
     }
 

-    // is the thread paused?
-    if ( shouldResume || IsPaused() )
+    // resume the thread if it is paused
+    if ( shouldResume )

         Resume();
 
     HANDLE hThread = m_internal->GetHandle();
 
     // does is still run?
         Resume();
 
     HANDLE hThread = m_internal->GetHandle();
 
     // does is still run?

-    if ( IsRunning() )
+    if ( isRunning || IsRunning() )

     {
         if ( IsMain() )
         {
     {
         if ( IsMain() )
         {


@@ -781,6 +836,7 @@ wxThreadError wxThread::Delete(ExitCode *pRc)
         }
 
         // ask the thread to terminate
         }
 
         // ask the thread to terminate

+        if ( shouldCancel )

         {
             wxCriticalSectionLocker lock(m_critsect);
 
         {
             wxCriticalSectionLocker lock(m_critsect);
 


@@ -864,7 +920,7 @@ wxThreadError wxThread::Delete(ExitCode *pRc)
 
     if ( !::GetExitCodeThread(hThread, (LPDWORD)&rc) )
     {
 
     if ( !::GetExitCodeThread(hThread, (LPDWORD)&rc) )
     {

-        wxLogLastError("GetExitCodeThread");
+        wxLogLastError(wxT("GetExitCodeThread"));

 
         rc = (ExitCode)-1;
     }
 
         rc = (ExitCode)-1;
     }


@@ -873,7 +929,7 @@ wxThreadError wxThread::Delete(ExitCode *pRc)
     {
         // if the thread exits normally, this is done in WinThreadStart, but in
         // this case it would have been too early because
     {
         // 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
+        // MsgWaitForMultipleObject() would fail if the thread handle was

         // closed while we were waiting on it, so we must do it here
         delete this;
     }
         // closed while we were waiting on it, so we must do it here
         delete this;
     }


@@ -918,7 +974,9 @@ void wxThread::Exit(ExitCode status)
         delete this;
     }
 
         delete this;
     }
 

-#if defined(__VISUALC__) || (defined(__BORLANDC__) && (__BORLANDC__ >= 0x500))
+#if defined(__VISUALC__) || \
+    (defined(__BORLANDC__) && (__BORLANDC__ >= 0x500)) || \
+    (defined(__GNUG__) && defined(__MSVCRT__))

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


@@ -1005,9 +1063,7 @@ bool wxThreadModule::OnInit()
         // in normal circumstances it will only happen if all other
         // TLS_MINIMUM_AVAILABLE (>= 64) indices are already taken - in other
         // words, this should never happen
         // in normal circumstances it will only happen if all other
         // TLS_MINIMUM_AVAILABLE (>= 64) indices are already taken - in other
         // words, this should never happen

-        wxLogSysError(_("Thread module initialization failed: "
-                        "impossible to allocate index in thread "
-                        "local storage"));
+        wxLogSysError(_("Thread module initialization failed: impossible to allocate index in thread local storage"));

 
         return FALSE;
     }
 
         return FALSE;
     }


@@ -1019,8 +1075,7 @@ bool wxThreadModule::OnInit()
         ::TlsFree(gs_tlsThisThread);
         gs_tlsThisThread = 0xFFFFFFFF;
 
         ::TlsFree(gs_tlsThisThread);
         gs_tlsThisThread = 0xFFFFFFFF;
 

-        wxLogSysError(_("Thread module initialization failed: "
-                        "can not store value in thread local storage"));
+        wxLogSysError(_("Thread module initialization failed: can not store value in thread local storage"));

 
         return FALSE;
     }
 
         return FALSE;
     }


@@ -1040,7 +1095,7 @@ void wxThreadModule::OnExit()
 {
     if ( !::TlsFree(gs_tlsThisThread) )
     {
 {
     if ( !::TlsFree(gs_tlsThisThread) )
     {

-        wxLogLastError("TlsFree failed.");
+        wxLogLastError(wxT("TlsFree failed."));

     }
 
     if ( gs_critsectGui )
     }
 
     if ( gs_critsectGui )


@@ -1091,7 +1146,7 @@ void WXDLLEXPORT wxMutexGuiLeave()
     }
     else
     {
     }
     else
     {

-        // decrement the number of waiters now
+        // decrement the number of threads waiting for GUI access now

         wxASSERT_MSG( gs_nWaitingForGui > 0,
                       wxT("calling wxMutexGuiLeave() without entering it first?") );
 
         wxASSERT_MSG( gs_nWaitingForGui > 0,
                       wxT("calling wxMutexGuiLeave() without entering it first?") );
 


@@ -1145,7 +1200,7 @@ void WXDLLEXPORT wxWakeUpMainThread()
     if ( !::PostThreadMessage(gs_idMainThread, WM_NULL, 0, 0) )
     {
         // should never happen
     if ( !::PostThreadMessage(gs_idMainThread, WM_NULL, 0, 0) )
     {
         // should never happen

-        wxLogLastError("PostThreadMessage(WM_NULL)");
+        wxLogLastError(wxT("PostThreadMessage(WM_NULL)"));

     }
 }
 
     }
 }