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

wxWidgets/include/wx/module.h

@@ -0,0 +1,103 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/module.h
+// Purpose:     Modules handling
+// Author:      Wolfram Gloger/adapted by Guilhem Lavaux
+// Modified by:
+// Created:     04/11/98
+// RCS-ID:      $Id: module.h 61872 2009-09-09 22:37:05Z VZ $
+// Copyright:   (c) Wolfram Gloger and Guilhem Lavaux
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_MODULE_H_
+#define _WX_MODULE_H_
+
+#include "wx/object.h"
+#include "wx/list.h"
+#include "wx/dynarray.h"
+
+// declare a linked list of modules
+class WXDLLIMPEXP_FWD_BASE wxModule;
+WX_DECLARE_USER_EXPORTED_LIST(wxModule, wxModuleList, WXDLLIMPEXP_BASE);
+
+// and an array of class info objects
+WX_DEFINE_USER_EXPORTED_ARRAY_PTR(wxClassInfo *, wxArrayClassInfo,
+                                    class WXDLLIMPEXP_BASE);
+
+
+// declaring a class derived from wxModule will automatically create an
+// instance of this class on program startup, call its OnInit() method and call
+// OnExit() on program termination (but only if OnInit() succeeded)
+class WXDLLIMPEXP_BASE wxModule : public wxObject
+{
+public:
+    wxModule() {}
+    virtual ~wxModule() {}
+
+    // if module init routine returns false the application
+    // will fail to startup
+
+    bool Init() { return OnInit(); }
+    void Exit() { OnExit(); }
+
+    // Override both of these
+
+        // called on program startup
+
+    virtual bool OnInit() = 0;
+
+        // called just before program termination, but only if OnInit()
+        // succeeded
+
+    virtual void OnExit() = 0;
+
+    static void RegisterModule(wxModule *module);
+    static void RegisterModules();
+    static bool InitializeModules();
+    static void CleanUpModules() { DoCleanUpModules(m_modules); }
+
+    // used by wxObjectLoader when unloading shared libs's
+
+    static void UnregisterModule(wxModule *module);
+
+protected:
+    static wxModuleList m_modules;
+
+    // the function to call from constructor of a deriving class add module
+    // dependency which will be initialized before the module and unloaded
+    // after that
+    void AddDependency(wxClassInfo *dep)
+    {
+        wxCHECK_RET( dep, wxT("NULL module dependency") );
+
+        m_dependencies.Add(dep);
+    }
+
+private:
+    // initialize module and Append it to initializedModules list recursively
+    // calling itself to satisfy module dependencies if needed
+    static bool
+    DoInitializeModule(wxModule *module, wxModuleList &initializedModules);
+
+    // cleanup the modules in the specified list (which may not contain all
+    // modules if we're called during initialization because not all modules
+    // could be initialized) and also empty m_modules itself
+    static void DoCleanUpModules(const wxModuleList& modules);
+
+
+    // module dependencies: contains
+    wxArrayClassInfo m_dependencies;
+
+    // used internally while initiliazing/cleaning up modules
+    enum
+    {
+        State_Registered,   // module registered but not initialized yet
+        State_Initializing, // we're initializing this module but not done yet
+        State_Initialized   // module initialized successfully
+    } m_state;
+
+
+    DECLARE_CLASS(wxModule)
+};
+
+#endif // _WX_MODULE_H_