Re: [boost] Bug in sp_counted_base and atomic_count?

Peter Dimov wrote:

There's also a hidden ordinary store to the vtable pointer. In general, when passing an object X from thread A to thread B, you are expected to ensure the necessary visibility (and not the author of X). Usually the queue that

you're using for message passing will contain the acquire/release pair in pop/push. Otherwise you wouldn't be able to pass ordinary objects between threads. Or to take a simple example:

Thank you very much. Now I understand. I underestimate the "pass to another thread" procedure, that must contain all necessary fences to ensure visibility of counter variable. Dmitriy V'jukov