cloudcompare/libs/qCC_db/include/ccSingleton.h

//##########################################################################
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//#  This program is free software; you can redistribute it and/or modify  #
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#ifndef CC_SINGLETON_HEADER
#define CC_SINGLETON_HEADER

//! Generic singleton encapsulation structure
template<class T> struct ccSingleton
{
	//! Default constructor
	ccSingleton() : instance(nullptr) {}
	//! Destructor
	~ccSingleton() { release(); }
	//! Releases the current instance
	inline void release() { if (instance) { delete instance; instance = nullptr; } }
	
	//! Current instance
	T* instance;
};

#endif //CC_SINGLETON_HEADER