lib_singleton.h

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* 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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#ifndef LIB_SINGLETON_H_
#define LIB_SINGLETON_H_
 
#include "../general/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_ */