[cpp-threads] Memory model counterproposal:synchronization operations

[Doug Lea]

> 
> Sorry, I tried to make that clear: it's just an abbreviation for
> synchronization operation. (Maybe I should have tried s15n o9n instead.

Sorry for not in turn being clear. I'd like to know
which operations you have in mind. For example,
Is a read that is guaranteed to not be re-ordered
with previous reads a syncop?

-Doug