>>> 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. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
