Re: Singleton Pattern

HI,
  I would like to know whetehr this is the right way to implement
thread safe singleton.
Generally we do locking and all at Instance method, Can we get rid of
these problems if we create instance while defining pInstance
variable.
Would it create any problem?

//CODE SNIPPET
class Sing
{
public:
        static Sing* Instance();

protected:
  Sing(){}
  ~Sing(){}

private:
        Sing(const Sing&);
        Sing& operator= (const Sing&);

        static Sing* pinstance;

};

Sing* Sing::pinstance = Instance(); // Please NOTE THIS.
pInstance is initialized at definition.

Sing* Sing::Instance ()
{
        if (pinstance == 0)
                pinstance = new Sing;

        return pinstance;

}

Thanks
K2