D:/Papagan/490.2006/490.2006/korsan/Papagan/490.2006/korsan/Papagan/CEGUISingletonX.h

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#ifndef _CEGUI_SINGLETON_X_H_
#define _CEGUI_SINGLETON_X_H_

#if defined(_MSC_VER)
#       pragma warning(push)
#       pragma warning(disable : 4786)
#endif

namespace CEGUI
{
        /*************************************************************************
                Class: CEGUISingletonX
                Alternative for the existing CEGUI Singleton class. This one doesn't
                require the Singleton to be explicitly instantiated by 'new'.
        *************************************************************************/
        template<class T>
        class CEGUISingletonX
        {
                private:
                        class _InstPtr
                        {
                                public:
                                        _InstPtr() : m_ptr(0) {}
                                        ~_InstPtr() { delete m_ptr; }
                                        T* get() { return m_ptr; }
                                        void Set(T* p)
                                        {
                                    if(p!= 0)
                                            {
                                                        delete m_ptr;
                                        m_ptr = p;
                                            }
                                }
                            private:
                                        T* m_ptr;
                        };

                        static _InstPtr sm_ptr;
                        CEGUISingletonX();
                        CEGUISingletonX(const CEGUISingletonX&);
                        CEGUISingletonX& operator=(const CEGUISingletonX&);

                public:
                        static T& getSingleton()
                        {
                                if(sm_ptr.get() == 0)
                                {
                            sm_ptr.Set(new T());
                        }
                                return *sm_ptr.get();
                        }

                        static T* getSingletonPtr()
                        {
                                if(sm_ptr.get() == 0)
                                {
                            sm_ptr.Set(new T());
                        }
                                return sm_ptr.get();
                        }
        };
}
#endif

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