Re: [Qemu-devel] [PATCH v4 33/47] Postcopy: Postcopy startup in migration thread

[Dr. David Alan Gilbert]

* Paolo Bonzini (address@hidden) wrote:
> 
> 
> On 20/11/2014 12:45, Dr. David Alan Gilbert wrote:
> > > For this case QEMU has atomic_read/atomic_set (corresponding to
> > > __ATOMIC_RELAXED in C/C++1x), so you could use those as well.
> >
> > Ah, so those look like they just volatile cast anyway.
> 
> Yeah, but it explicitly shows that the assignment is a) for a
> multi-threaded operation b) using relaxed semantics.  It attaches the
> information to the use instead of the variable; it just happens that
> volatile is the pre-C11 way to express those.

OK, I'll use those anyway; Ideally what I'd have is a way to mark
something so that it'd compile-time-fail if I didn't use an atomic_
on it, because it's the type of thing that I'm bound to forget somewhere.

Dave

> 
> Paolo
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK