Singleton.h

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#ifndef __SINGLETON__H__
#define __SINGLETON__H__

template <typename T>
class Singleton {
public:
        static T & Instance() {
                // This variant of returning static variable has big advantage.
                // You don't have to care about destruction of the holding object
                // (if it was using dynamic allocation or it was declared static
                // as a private variable).
                // Sometimes it's called "Meyer's singleton", according to the author.
                static T instance;
                return instance;
        }

private:
        // Protections - not implemented
        Singleton();
        ~Singleton();
        Singleton(const Singleton &);
        Singleton & operator=(const Singleton &);
};

#endif /* #ifndef __SINGLETON__H__ */

/* End of file Singleton.h */

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