> -----Original Message-----
> 
> Not really, the id can't change.
> The id is only set once when the QMutexPrivate is used for the first
> time.
> (And that change has already been aquired for a long time)
> 
> Acquire is uneccessary.
> 
> It was added in commit 5bfeab87 when the uses of the operator were
> removed. I
> guess a lot of the barers where added for safety, because it would have
> been
> too much work to look in so many place which one were necessary.
> 
> --
> Olivier
> 

And removing barriers is always scary.

By the way, I assume the intent is to limit the implementation to only using 
int/pointer-sized atomics, not double width atomics?



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