At 12:49 +0100 on 16 Apr (1429188559), Jan Beulich wrote: > >>> On 16.04.15 at 13:25, <t...@xen.org> wrote: > > But also: AFAICS the GCC builtin __sync_fetch_and_add() does almost > > exactly this (the difference being that those are also compiler > > barriers where this is only a CPU barrier). Should we be using it > > instead? > > I'm afraid that's useful only from gcc 4.5.x onwards; earlier versions > (on x86 at least) simply generate a function call relying on a library to > implement it.
Darn. :( Tim. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
