Re: [boost] [interprocess] Atomic ops supports for Alpha processors.

Peter Dimov wrote:

Markus Schöpflin:

...

Peter,

I have read your paper referenced above and a few of the other papers dealing with atomic ops, but I failed to find a clear definition of what 'acquire' and 'release' semantics are supposed to mean. Could you point me into the right direction, please? Also, in your paper you're referring to [intro.concur], where could I find this?

I think that the relevant paper at the moment is

http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2334.htm

Basically, if a thread A load-acquires a memory location that has been store-released by thread B, then after the load thread A is guaranteed to see the updates that thread B has done prior to the store.

Thank you. Markus