39 lines
782 B
C++
39 lines
782 B
C++
/*
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* singleton.h
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*
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* Created on: Sep 11, 2019
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* Author: compi
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*/
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#ifndef SINGLETON_H_
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#define SINGLETON_H_
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#include <utility>
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namespace f4ll_cpp {
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template<typename T> class Singleton {
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public:
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static T &Instance() { return *m_instance; }
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template<typename ... Args>
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static T &Init(Args &&... args)
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{
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static T instance{ std::forward<Args>(args)... };
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if(!m_instance)
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m_instance = &instance;
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return instance;
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}
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protected:
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Singleton() = default;
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Singleton(const Singleton &) = delete;
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Singleton &operator=(const Singleton &) = delete;
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virtual ~Singleton() = default;
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static T *m_instance;
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};
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template<typename T> T* Singleton<T>::m_instance = nullptr;
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} // f4ll_cpp
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#endif /* SINGLETON_H_ */
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