Singleton.hpp

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/*
 * Singleton.hpp
 *
 *  Created on: Oct 17, 2011
 *      Author: mriedel
 */

#ifndef SINGLETON_HPP_
#define SINGLETON_HPP_

#include <telekyb_defines/telekyb_defines.hpp>
#include <ros/assert.h>

#include <boost/utility.hpp>

#include <telekyb_base/Base/BaseSingleton.hpp>

namespace TELEKYB_NAMESPACE
{

template <class _T>
class Singleton : public BaseSingleton, boost::noncopyable
{
private:
//      Singleton(const Singleton<_T> &);
//      Singleton& operator=(const Singleton<_T> &);
        static _T* m_pInstance;

protected:
        Singleton() {
                ROS_ASSERT( !m_pInstance ); // you can only create if it does not yet exist.
                m_pInstance = static_cast<_T*>(this);
        };
        virtual ~Singleton() {
                ROS_ASSERT( m_pInstance ); // Delete should not get called if there is no instance.
                m_pInstance = NULL;
        };

public:
        static _T& Instance() {
                if (!m_pInstance) { m_pInstance = new _T; }
                ROS_ASSERT( m_pInstance );
                return ( *m_pInstance );
        }

        static _T* InstancePtr() {
                if (!m_pInstance) { m_pInstance = new _T; }
                ROS_ASSERT( m_pInstance );
                return m_pInstance;
        }

};


template <class T> T* Singleton<T>::m_pInstance = NULL;


}


#endif /* SINGLETON_HPP_ */