Re: [boost] Re: Race condition in boost::spirit?

From: Roland Schwarz (roland.schwarz_at_[hidden])
Date: 2005-01-19 13:31:54

Stefan Slapeta wrote:

> I can ... a little static helper class is very helpful in this 
> situation (I posted it some time ago to the list):
>
> ////////////////////////////////////////
> // class template static_
> ////////////////////////////////////////
> template <typename T, typename OwnerT = void>
> struct static_
> {
>     T* operator -> () const { return &member; }
>
>     static T* get() { return &member; }
>
> private:
>     static T member;
> };
>
> template <typename T, typename OwnerT> T static_<T, OwnerT>::member;
>
> ///////////////
>
>
> This way you can declare a global static instance of a type from 
> anywhere in the code, i.e. in header files, because templates show a 
> different behaviour for static members.
>
This is a really nice trick!
However a question:
Is it guaranteed by the standard, that the ctor of the "member" is 
beeing called at program startup?

Perhaps thread_specific_ptr itself should be implemented by means of 
this idiom then?

Roland