Commit 47329ba1 authored May 17, 2023 by Alice Ryhl Committed by Miguel Ojeda May 31, 2023

rust: sync: implement `AsRef<T>` for `Arc<T>`



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@microsoft.com>
Signed-off-by: Wedson Almeida Filho <walmeida@microsoft.com>
Signed-off-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Reviewed-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Andreas Hindborg <a.hindborg@samsung.com>
Link: https://lore.kernel.org/r/20230517200814.3157916-2-aliceryhl@google.com


Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

parent bd780aea

rust/kernel/sync/arc.rs

+6 −0

Original line number	Diff line number	Diff line
		@@ -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.