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   DIR Return to: C/C++ related questions
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       #Post#: 12--------------------------------------------------
       Simgleton pattern
   DIR By: avinash.srin
       Date: August 25, 2011, 9:48 am
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       What is the Single design pattern? Implement it in C++.
       #Post#: 15--------------------------------------------------
       Re: Simgleton pattern
   DIR By: avinash.srin
       Date: August 26, 2011, 5:04 am
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       It is the case where we need to use a single object of a class
       throughout the lifetime of an application.
       One of the ways to implement it in C++ is as follows:
       --- Code ---
       
       class MySingleton {
       public:
       static MySingleton& Instance() {
       static MySingleton singleton;
       return singleton;
       }
       
       // Other non-static member functions
       private:
       MySingleton() {};                                //
       Private constructor
       MySingleton(const MySingleton&);                 //
       Prevent copy-construction
       MySingleton& operator=(const MySingleton&);      //
       Prevent assignment
       };
       
       --- End Code ---
       #Post#: 27--------------------------------------------------
       Re: Simgleton pattern
   DIR By: bloodkamal
       Date: September 6, 2011, 12:28 am
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       Any realtime example where singleton is useful?
       #Post#: 28--------------------------------------------------
       Re: Simgleton pattern
   DIR By: avinash.srin
       Date: September 14, 2011, 6:28 am
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       There is a requirement for a NetworkDeviceManager class whose
       functionality is to maintain a list of NetworkDevices in a
       Network Management System. There can be 'n' number of Network
       Devices and only one NetworkDeviceManager at any point of time
       in the application. Each time a NetworkDevice is added to the
       system, the NetworkDeviceManager is invoked and the
       NetworkDevice is added to it.
       The same example when implemented, the NetworkDeviceManager
       instance maintains a vector of NetworkDevice objects. Whenever,
       a NetworkDevice object is instantiated and added to the system,
       it has to invoke the same NetworkDeviceManager instance and add
       itself to the vector maintained by the NetworkDeviceManager.
       In this case, the NetworkDeviceManager can be implemented as a
       Singleton class, which gives it a global presence as well as
       ensures that no duplicate instance is created.
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