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

wxWidgets/include/wx/evtloop.h

@@ -0,0 +1,229 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/evtloop.h
+// Purpose:     declares wxEventLoop class
+// Author:      Vadim Zeitlin
+// Modified by:
+// Created:     01.06.01
+// RCS-ID:      $Id: evtloop.h 53607 2008-05-16 15:21:40Z SN $
+// Copyright:   (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_EVTLOOP_H_
+#define _WX_EVTLOOP_H_
+
+#include "wx/utils.h"
+
+class WXDLLIMPEXP_FWD_CORE wxEventLoop;
+
+// ----------------------------------------------------------------------------
+// wxEventLoop: a GUI event loop
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxEventLoopBase
+{
+public:
+    // trivial, but needed (because of wxEventLoopBase) ctor
+    wxEventLoopBase() { }
+
+    // dtor
+    virtual ~wxEventLoopBase() { }
+
+    // start the event loop, return the exit code when it is finished
+    virtual int Run() = 0;
+
+    // exit from the loop with the given exit code
+    virtual void Exit(int rc = 0) = 0;
+
+    // return true if any events are available
+    virtual bool Pending() const = 0;
+
+    // dispatch a single event, return false if we should exit from the loop
+    virtual bool Dispatch() = 0;
+
+    // return currently active (running) event loop, may be NULL
+    static wxEventLoop *GetActive() { return ms_activeLoop; }
+
+    // set currently active (running) event loop
+    static void SetActive(wxEventLoop* loop) { ms_activeLoop = loop; }
+
+    // is this event loop running now?
+    //
+    // notice that even if this event loop hasn't terminated yet but has just
+    // spawned a nested (e.g. modal) event loop, this would return false
+    bool IsRunning() const;
+
+protected:
+    // this function should be called before the event loop terminates, whether
+    // this happens normally (because of Exit() call) or abnormally (because of
+    // an exception thrown from inside the loop)
+    virtual void OnExit() { }
+
+
+    // the pointer to currently active loop
+    static wxEventLoop *ms_activeLoop;
+
+    DECLARE_NO_COPY_CLASS(wxEventLoopBase)
+};
+
+#if defined(__WXMSW__) || defined(__WXMAC__) || defined(__WXDFB__)
+
+// this class can be used to implement a standard event loop logic using
+// Pending() and Dispatch()
+//
+// it also handles idle processing automatically
+class WXDLLEXPORT wxEventLoopManual : public wxEventLoopBase
+{
+public:
+    wxEventLoopManual();
+
+    // enters a loop calling OnNextIteration(), Pending() and Dispatch() and
+    // terminating when Exit() is called
+    virtual int Run();
+
+    // sets the "should exit" flag and wakes up the loop so that it terminates
+    // soon
+    virtual void Exit(int rc = 0);
+
+protected:
+    // implement this to wake up the loop: usually done by posting a dummy event
+    // to it (called from Exit())
+    virtual void WakeUp() = 0;
+
+    // may be overridden to perform some action at the start of each new event
+    // loop iteration
+    virtual void OnNextIteration() { }
+
+
+    // the loop exit code
+    int m_exitcode;
+
+    // should we exit the loop?
+    bool m_shouldExit;
+};
+
+#endif // platforms using "manual" loop
+
+// we're moving away from old m_impl wxEventLoop model as otherwise the user
+// code doesn't have access to platform-specific wxEventLoop methods and this
+// can sometimes be very useful (e.g. under MSW this is necessary for
+// integration with MFC) but currently this is done for MSW only, other ports
+// should follow a.s.a.p.
+#if defined(__WXPALMOS__)
+    #include "wx/palmos/evtloop.h"
+#elif defined(__WXMSW__)
+    #include "wx/msw/evtloop.h"
+#elif defined(__WXMAC__)
+    #include "wx/mac/evtloop.h"
+#elif defined(__WXDFB__)
+    #include "wx/dfb/evtloop.h"
+#else // other platform
+
+class WXDLLEXPORT wxEventLoopImpl;
+
+class WXDLLEXPORT wxEventLoop : public wxEventLoopBase
+{
+public:
+    wxEventLoop() { m_impl = NULL; }
+    virtual ~wxEventLoop();
+
+    virtual int Run();
+    virtual void Exit(int rc = 0);
+    virtual bool Pending() const;
+    virtual bool Dispatch();
+
+protected:
+    // the pointer to the port specific implementation class
+    wxEventLoopImpl *m_impl;
+
+    DECLARE_NO_COPY_CLASS(wxEventLoop)
+};
+
+#endif // platforms
+
+inline bool wxEventLoopBase::IsRunning() const { return GetActive() == this; }
+
+// ----------------------------------------------------------------------------
+// wxModalEventLoop
+// ----------------------------------------------------------------------------
+
+// this is a naive generic implementation which uses wxWindowDisabler to
+// implement modality, we will surely need platform-specific implementations
+// too, this generic implementation is here only temporarily to see how it
+// works
+class WXDLLEXPORT wxModalEventLoop : public wxEventLoop
+{
+public:
+    wxModalEventLoop(wxWindow *winModal)
+    {
+        m_windowDisabler = new wxWindowDisabler(winModal);
+    }
+
+protected:
+    virtual void OnExit()
+    {
+        delete m_windowDisabler;
+        m_windowDisabler = NULL;
+
+        wxEventLoop::OnExit();
+    }
+
+private:
+    wxWindowDisabler *m_windowDisabler;
+};
+
+// ----------------------------------------------------------------------------
+// wxEventLoopActivator: helper class for wxEventLoop implementations
+// ----------------------------------------------------------------------------
+
+// this object sets the wxEventLoop given to the ctor as the currently active
+// one and unsets it in its dtor, this is especially useful in presence of
+// exceptions but is more tidy even when we don't use them
+class wxEventLoopActivator
+{
+public:
+    wxEventLoopActivator(wxEventLoop *evtLoop)
+    {
+        m_evtLoopOld = wxEventLoop::GetActive();
+        wxEventLoop::SetActive(evtLoop);
+    }
+
+    ~wxEventLoopActivator()
+    {
+        // restore the previously active event loop
+        wxEventLoop::SetActive(m_evtLoopOld);
+    }
+
+private:
+    wxEventLoop *m_evtLoopOld;
+};
+
+#if wxABI_VERSION >= 20808
+class wxEventLoopGuarantor
+{
+public:
+    wxEventLoopGuarantor()
+    {
+        m_evtLoopNew = NULL;
+        if (!wxEventLoop::GetActive())
+        {
+            m_evtLoopNew = new wxEventLoop;
+            wxEventLoop::SetActive(m_evtLoopNew);
+        }
+    }
+
+    ~wxEventLoopGuarantor()
+    {
+        if (m_evtLoopNew)
+        {
+            wxEventLoop::SetActive(NULL);
+            delete m_evtLoopNew;
+        }
+    }
+
+private:
+    wxEventLoop *m_evtLoopNew;
+};
+#endif // wxABI_VERSION >= 20805
+
+#endif // _WX_EVTLOOP_H_