Singleton Template Class

/*!
   \file       single.h
   \brief      A singleton template class. Make sure you use 'friend class Single<Derived>;' so the derived constructor can be private.
   \author     ~Ziggy Stardust
*/

#ifndef __SINGLE_H__
#define __SINGLE_H__
#include <assert.h>

template <class T>
class Single {
protected:
    static T* pInstance;
public:
    /*
    @param  - None
    @return - pointer to derived class
    */
    static T* Instance() {
        if(!pInstance) pInstance = new T;
        return pInstance;
    }

    //Frees up instance
    static void DestroyInstance() {
        if(pInstance) delete pInstance;
        pInstance = 0;
    }
};

template <class T>
T* Single<T>::pInstance = 0;

#endif