Worst Singleton.h

Worst Singleton.h

#ifndef _SINGLETON_H__
#define _SINGLETON_H__

#include <assert.h>
template <typename T> class Singleton
{
protected:
    static T* ms_Singleton;
public:
    Singleton( void )
    {
        assert( !ms_Singleton );
#if defined( _MSC_VER ) && _MSC_VER < 1200
        int offset = (int)(T*)1 - (int)(Singleton <T>*)(T*)1;
        ms_Singleton = (T*)((int)this + offset);
#else
        ms_Singleton = static_cast< T* >( this );
#endif
    }
    ~Singleton( void )
    {  assert( ms_Singleton );  ms_Singleton = 0;  }
    static T& getSingleton( void )
    {    assert( ms_Singleton );  return ( *ms_Singleton ); }
    static T* getSingletonPtr( void )
    { return ms_Singleton; }
};

#endif