http://code.google.com/p/rpcs3/source/detail?r=44

wxWidgets/include/wx/msw/evtloop.h

@@ -0,0 +1,69 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/msw/evtloop.h
+// Purpose:     wxEventLoop class for MSW
+// Author:      Vadim Zeitlin
+// Modified by:
+// Created:     2004-07-31
+// RCS-ID:      $Id: evtloop.h 36881 2006-01-15 10:13:40Z ABX $
+// Copyright:   (c) 2003-2004 Vadim Zeitlin <vadim@wxwindows.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_MSW_EVTLOOP_H_
+#define _WX_MSW_EVTLOOP_H_
+
+#include "wx/window.h"
+
+// ----------------------------------------------------------------------------
+// wxEventLoop
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxEventLoop : public wxEventLoopManual
+{
+public:
+    wxEventLoop();
+
+    // implement base class pure virtuals
+    virtual bool Pending() const;
+    virtual bool Dispatch();
+
+    // MSW-specific methods
+    // --------------------
+
+    // preprocess a message, return true if processed (i.e. no further
+    // dispatching required)
+    virtual bool PreProcessMessage(WXMSG *msg);
+
+    // process a single message
+    virtual void ProcessMessage(WXMSG *msg);
+
+    // set the critical window: this is the window such that all the events
+    // except those to this window (and its children) stop to be processed
+    // (typical examples: assert or crash report dialog)
+    //
+    // calling this function with NULL argument restores the normal event
+    // handling
+    static void SetCriticalWindow(wxWindowMSW *win) { ms_winCritical = win; }
+
+    // return true if there is no critical window or if this window is [a child
+    // of] the critical one
+    static bool AllowProcessing(wxWindowMSW *win)
+    {
+        return !ms_winCritical || IsChildOfCriticalWindow(win);
+    }
+
+protected:
+    // override/implement base class virtuals
+    virtual void WakeUp();
+    virtual void OnNextIteration();
+
+    // check if the given window is a child of ms_winCritical (which must be
+    // non NULL)
+    static bool IsChildOfCriticalWindow(wxWindowMSW *win);
+
+
+    // critical window or NULL
+    static wxWindowMSW *ms_winCritical;
+};
+
+#endif // _WX_MSW_EVTLOOP_H_