if you want a class that has only one representation in the proccess
declaration
class Singleton
{
public: static Singleton* Instance();
protected: Singleton();
Singleton(const Singleton&);
Singleton& operator= (const Singleton&);
private:
static Singleton* pinstance;
};
implementation
Singleton* Singleton::pinstance = 0;// initialize pointer
Singleton* Singleton::Instance ()
{
if (pinstance == 0) // is it the first call?
{
pinstance = new Singleton; // create sole instance
}
return pinstance; // address of sole instance
}
Singleton::Singleton()
{ //... perform necessary instance initializations
}
usage
Singleton *p1 = Singleton::Instance();
Singleton *p2 = p1->Instance();
Singleton & ref = * Singleton::Instance();
Saturday, May 9, 2009
Singleton Design Pattern in c++
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http://www.naughter.com/
thank you!
this is just what i need for a university project.
bimba.
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