#pragma once

#include <assert.h>

template <class T> class CSingleton  
{
protected:
	static T* ms_pSingleton;

public:
	CSingleton()
	{
		assert( !ms_pSingleton );
		/*
		int offset = (int)(T*)1 - (int)(CSingleton <T> *)(T*)1;
		ms_pSingleton = (T *)((int)this + offset);
		*/
		ms_pSingleton = static_cast <T*> (this);
	}
	~CSingleton()
	{ assert( ms_pSingleton ); ms_pSingleton = NULL; }
	static T* GetInstance()
	{ assert( ms_pSingleton ); return ms_pSingleton; }
};

template <class T> T* CSingleton <T>::ms_pSingleton = NULL;