On Mon, 22 Jul 2024 at 08:00, Jens Maurer via Std-Proposals <
std-proposals_at_[hidden]> wrote:

>
>
> On 22/07/2024 00.23, Joseph Schuchart via Std-Proposals wrote:
> > I'm not sure that this API could be implemented everywhere
>
> And here's the problem: I don't know how you can provide ABA
> avoidance if all your hardware has is atomic compare-and-swap.
>
> So, this doesn't really help write portable programs.
>
> We have rather few features in C++ that aren't available on all
> implementations, so the introduction of such a non-portable
> feature needs additional rationale.
>

And for better or for worse, "not supported on x86" is likely to need a lot
more rationale than "not supported on AVR" (for example).



>
> (There are plenty of hardware features that aren't available
> everywhere, yet we strive to make C++ interfaces on them that
> can be implemented everywhere, e.g. std::simd.)
>
> Jens
>