Subj : Re: [.NET] Volatile Fields
To   : comp.programming.threads
From : David Hopwood
Date : Sun Sep 18 2005 01:42 pm

Cool Guy wrote:
> David Schwartz <davids@webmaster.com> wrote:
> 
>>    What do caches have to do with thread-safety? It's read/write *ordering* 
>>that creates thread safety problems, not caches.
> 
> I think I understand it more now -- when you talk of read/write re-ordering
> you're talking about when reads/writes are effectively made to/from **main
> memory**, right?

No. We're talking about when reads/writes are "performed" according to the
memory model. This may or may not correspond to when they are read/written
to "main memory" in any particular implementation. You can't see when the
latter happens (except in some cases when dealing with I/O devices).

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

.