Re: [PATCH v2 1/2] rust: Update PCI binding safety comments and add inline compiler hint

[Benno Lossin]

On Tue Jul 22, 2025 at 11:51 AM CEST, Danilo Krummrich wrote:
> I think they're good, but we're pretty late in the cycle now. That should be
> fine though, we can probably take them through the nova tree, or in the worst
> case share a tag, if needed.
>
> Given that, it would probably be good to add the Guarantee section on as_raw(),
> as proposed by Benno, right away.
>
> @Benno: Any proposal on what this section should say?

At a minimum I'd say "The returned pointer is valid.", but that doesn't
really say for what it's valid... AFAIK you're mostly using this pointer
to pass it to the C side, in that case, how about:

    /// # Guarantees
    ///
    /// The returned pointer is valid for reads and writes from the C side for as long as `self` exists.

Maybe we need to change it a bit more, but let's just start with this.

(If you're also using the pointer from Rust, then we need to make
changes)

---
Cheers,
Benno