#ifndef SINGLETON_H
#define SINGLETON_H

template < class T >
class singleton
{
protected:
    singleton(){};

private:
    singleton( const singleton & ){};
    singleton &operator =( const singleton & ){};
    static T *m_instance;
public:
    static T * GetInstance();
};

template  <class T >
T * singleton< T >::GetInstance()
{
    if ( m_instance==nullptr )
    {
        m_instance = new T();
    }

    return m_instance;
}

template < class T >
T * singleton< T >::m_instance = nullptr;


#endif // SINGLETON_H