use AllocExclusive for reference counting

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14093 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/mgl/font.h

@@ -90,17 +90,16 @@ public:
     virtual void SetUnderlined(bool underlined);
     virtual void SetEncoding(wxFontEncoding encoding);
 
-    // implementation from now on
-    void Unshare();
-
     struct font_t *GetMGLfont_t(float scale, bool antialiased);
 
-    // no data :-)
-
 protected:
     // common part of all ctors
     void Init() {}
 
+    // ref counting code
+    virtual wxObjectRefData *CreateRefData() const;
+    virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
+
 private:
     DECLARE_DYNAMIC_CLASS(wxFont)
 };