Tweaking atomics and memory barriers in shared_ptr

Jonathan Wakely
Sun Oct 28 11:51:00 GMT 2007

On 27/10/2007, Peter Dimov <> wrote:
> Whether use_count() should have acquire semantics instead of relaxed is not
> quite clear even to me. I can think of no legitimate example of inter-thread
> communication via use_count(), so I tend toward "relaxed", which is
> basically why Boost uses a volatile read.

Thanks Peter,
Following that explanation I'll revise the comment in my patch and I
apologise for calling it a hack  :-)

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