https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69002
--- Comment #5 from Florian Weimer <fw at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #4)
> The footnote to 6.5.2.3/5 says "Members can be safely accessed using a
> non-atomic object which is assigned to or from the atomic object." Does it
> mean that the following is OK?
Yes, I think this is how this language construct is supposed to be used.
> void
> write1 (_Atomic S p, int x)
> {
> S s = p;
> s.x = x;
> }
>
> void
> write2 (_Atomic S *p, int x)
> {
> S *s = p;
> s->x = x;
> }
Should be:
void
write2 (_Atomic S *p, int x)
{
S s = {.x = x};
*p = s;
}
write1 is a bit nonsensical.
