CSC/ECE 517 Fall 2010/ch3 3f DF: Difference between revisions
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| Line 30: | Line 30: | ||
} | } | ||
} | } | ||
//Desired interface options.... | |||
private: | private: | ||
//Direct access to the constructor/destructor is prohibited | |||
MySingleton() {} | |||
virtual ~MySingleton() {} | |||
static MySingleton* s_pSingletonObject; | |||
}; | }; | ||
</pre> | </pre> | ||
Revision as of 05:42, 4 October 2010
The Singleton pattern in static and dynamic languages
Introduction
Text overview
UML Diagram
Static Language Implementation
class MySingleton
{
public:
static MySingleton* Instance()
{
if(s_pSingletonObject == NULL)
s_pSingletonObject = new MySingleton;
return s_pSingletonObject;
}
static void Destroy()
{
if(s_pSingletonObject != NULL)
{
delete s_pSingletonObject;
s_pSingletonObject = NULL;
}
}
//Desired interface options....
private:
//Direct access to the constructor/destructor is prohibited
MySingleton() {}
virtual ~MySingleton() {}
static MySingleton* s_pSingletonObject;
};
Dynamic Language Implementation
Ruby Sample code here