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40 lines
1.3 KiB
C++
40 lines
1.3 KiB
C++
/*
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* threadsafesingleton.h
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*
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* Created on: Aug 7, 2015
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* Author: f4exb
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*/
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#ifndef INCLUDE_UTIL_THREADSAFESINGLETON_H_
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#define INCLUDE_UTIL_THREADSAFESINGLETON_H_
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//! Template class used to make from a class a singleton.
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/** S is the type of the singleton object to instantiate.
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<br> This class permits to gather all singleton code in the same place
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and not to pollute object interface with singleton methods.
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<br> Accessing to the instance of S is made through ThreadSafeSingleton<S>::instance()
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<br><B>Note :</B> The class using this adapter should have constructor and
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destructor protected and copy constructor and operator= private.
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<br>Besides it should declare the class ThreadSafeSingleton<S> friend in order
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this class can make the construction.
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*/
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template <class S> class ThreadSafeSingleton
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{
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public:
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static S& instance() { return *_pInstance; }
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protected:
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ThreadSafeSingleton() {}
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~ThreadSafeSingleton() { delete _pInstance; }
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static S* _pInstance;
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private:
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ThreadSafeSingleton(const ThreadSafeSingleton&) {}
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ThreadSafeSingleton& operator = (const ThreadSafeSingleton&) {return *this;}
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};
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template <class S> S *ThreadSafeSingleton<S>::_pInstance = new S;
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#endif /* INCLUDE_UTIL_THREADSAFESINGLETON_H_ */
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