Re: [boost] [FSM] Review library version update

From: Andreas Huber (ahd6974-spamgroupstrap_at_[hidden])
Date: 2007-02-05 15:17:32

Fabien Niñoles wrote:
> Probably you should put it has a static local variable inside a
> protected function, like this:
>
>    //! The method returns a reference to the only dispatcher instance
>
>    static state_dispatcher const& get()
>    {
>      static state_dispatcher instance;
>      return instance;
>    }

In a multithreaded app this might work on some platforms, on others it 
doesn't:

Quote from http://msdn2.microsoft.com/en-us/library/s1sb61xd.aspx:
"Assigning to a static local variable is not thread safe and is not 
recommended as a programming practice."

Although this isn't very concise wording (IIRC, the standard says that 
it should work for literals assigned to PODs) it seems clear that it 
won't work for non-PODs...

Regards,

-- 
Andreas Huber
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