share wxEventLoop::IsRunning() implementation between all ports; moved wxEventLoopActivator used by it in wx/evtloop.h instead of duplicating it in 3 different .cpp files (and not using it at all in 3 other ones)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@36842 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/os2/evtloop.cpp

@@ -83,30 +83,6 @@ private:
 
 wxDEFINE_TIED_SCOPED_PTR_TYPE(wxEventLoopImpl);
 
-// this object sets the wxEventLoop given to the ctor as the currently active
-// one and unsets it in its dtor
-class wxEventLoopActivator
-{
-public:
-    wxEventLoopActivator(wxEventLoop **pActive,
-                         wxEventLoop *evtLoop)
-    {
-        m_pActive = pActive;
-        m_evtLoopOld = *pActive;
-        *pActive = evtLoop;
-    }
-
-    ~wxEventLoopActivator()
-    {
-        // restore the previously active event loop
-        *m_pActive = m_evtLoopOld;
-    }
-
-private:
-    wxEventLoop *m_evtLoopOld;
-    wxEventLoop **m_pActive;
-};
-
 // ============================================================================
 // wxEventLoopImpl implementation
 // ============================================================================
@@ -271,7 +247,7 @@ int wxEventLoop::Run()
     // SendIdleMessage() and Dispatch() below may throw so the code here should
     // be exception-safe, hence we must use local objects for all actions we
     // should undo
-    wxEventLoopActivator activate(&ms_activeLoop, this);
+    wxEventLoopActivator activate(this);
     wxEventLoopImplTiedPtr impl(&m_impl, new wxEventLoopImpl);
 
     CallEventLoopMethod  callOnExit(this, &wxEventLoop::OnExit);