lib_singleton.h

/*****************************************************************************
* Multiscale Universal Interface Code Coupling Library                       *
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* Copyright (C) 2019 Y. H. Tang, S. Kudo, X. Bian, Z. Li, G. E. Karniadakis  *
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* ** GNU General Public License, version 3 **                                *
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* This program is free software: you can redistribute it and/or modify       *
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/**
 * @file lib_singleton.h
 * @author Y. H. Tang
 * @date 14 March 2014
 * @brief Base class to contain communicator in comm_factory.h
 */

#ifndef LIB_SINGLETON_H_
#define LIB_SINGLETON_H_

#include "util.h"

namespace mui {

template<class T>
class singleton
{
public:
	static T& instance() {
		static T instance_;
		return instance_;
	}
private:
	// make all constructors etc. private to guarantee uniqueness
	singleton();
	singleton(const singleton&);
	singleton& operator=(const singleton&);
	~singleton();
};

}

#endif /* LIB_SINGLETON_H_ */