Subj : Re: [x86] Reads/Writes
To   : comp.programming.threads
From : David Hopwood
Date : Wed Sep 28 2005 04:02 am

David Hopwood wrote:
> If you mean something more specific like "ordinary writes to WB memory on x86
> have similar memory barrier semantics to writes to volatile variables in
> .NET 2.x", then that's basically correct: both imply a release barrier before
> the write, and neither guarantee remote write atomicity (i.e. different
> processors can observe the writes in a different order). The same is true of
> reads, BTW: ordinary reads from WB memory in x86 and from volatiles in
> .NET 2.x both imply an acquire barrier after the read.

I should mention that this is all qualified by "as far as I understand the
documentation", and that the documentation is not very precise.

-- 
David Hopwood <david.nospam.hopwood@blueyonder.co.uk>

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