RSingleton.h

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#ifndef RSINGLETON_H_
#define RSINGLETON_H_

#include <QApplication>
#include <QObject>
#include <QMap>
#include <QString>
#include <typeinfo>
#include "RDebug.h"

class RSingleton {
public:
    virtual ~RSingleton() {
    }
    template<class Derived>
        static Derived& getInstance();
        static void cleanUp();

protected:
    RSingleton();

private:
    static QMap<QString, RSingleton*> map;
};

Q_DECLARE_METATYPE(RSingleton*)

template<class Derived>
Derived& RSingleton::getInstance() {
    if (!map.contains(typeid(Derived).name())) {
        map[typeid(Derived).name()] = new Derived;
    }
    Derived* d = dynamic_cast<Derived*> (map[typeid(Derived).name()]);
    if (d == NULL) {
        Q_ASSERT("RSingleton::getInstance(): \"Derived\" in not a singleton");
    }
    return *d;
}

#endif /* RSINGLETON_H_ */