Subj : Re: A question about atomic_ptr
To   : comp.programming.threads
From : Chris Thomasson
Date : Thu Apr 14 2005 07:59 pm

> The point is that you no longer need tricks in the copy constructor. The
> original race is only a problem when the count is 1 so that you can have 
> the
> assignment destroy the count and then the copy constructor attempt to
> increment it.

No. The race-condition occurs when a thread that does not "previously" own a 
reference tries to increment the count. shared_ptr overcomes this 
race-condition by "requiring" that a thread own a reference in order to make 
a copy...

.