Re: [PATCH v1 2/2] rust: sync: implement `AsRef<T>` for `Arc<T>`

[Benno Lossin]

On 5/17/23 22:08, Alice Ryhl wrote:
> This trait lets you use `Arc<T>` in code that is generic over smart
> pointer types.
> 
> The `AsRef` trait should be implemented on all smart pointers. The
> standard library also implements it on the ordinary `Arc`.
> 
> Co-developed-by: Wedson Almeida Filho <walmeida@xxxxxxxxxxxxx>
> Signed-off-by: Wedson Almeida Filho <walmeida@xxxxxxxxxxxxx>
> Signed-off-by: Alice Ryhl <aliceryhl@xxxxxxxxxx>

Reviewed-by: Benno Lossin <benno.lossin@xxxxxxxxx>

> ---
>   rust/kernel/sync/arc.rs | 6 ++++++
>   1 file changed, 6 insertions(+)
> 
> diff --git a/rust/kernel/sync/arc.rs b/rust/kernel/sync/arc.rs
> index 274febe3bb06..9ec911e4a0c7 100644
> --- a/rust/kernel/sync/arc.rs
> +++ b/rust/kernel/sync/arc.rs
> @@ -264,6 +264,12 @@ impl<T: ?Sized> Deref for Arc<T> {
>       }
>   }
> 
> +impl<T: ?Sized> AsRef<T> for Arc<T> {
> +    fn as_ref(&self) -> &T {
> +        self.deref()
> +    }
> +}
> +
>   impl<T: ?Sized> Clone for Arc<T> {
>       fn clone(&self) -> Self {
>           // INVARIANT: C `refcount_inc` saturates the refcount, so it cannot overflow to zero.
> --
> 2.40.1.606.ga4b1b128d6-goog
> 

-- 
Cheers,
Benno