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authorAlice Ryhl <aliceryhl@google.com>2023-05-17 23:08:14 +0300
committerMiguel Ojeda <ojeda@kernel.org>2023-05-31 19:53:10 +0300
commit47329ba14b5aac1ac975544eee71ecc888557d23 (patch)
tree2f643c9685a471d7a2b4c4d8738772cdc4a35470 /rust
parentbd780aea671eda9660837c05d9ba58de22ceecad (diff)
downloadlinux-47329ba14b5aac1ac975544eee71ecc888557d23.tar.xz
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>
Diffstat (limited to 'rust')
-rw-r--r--rust/kernel/sync/arc.rs6
1 files changed, 6 insertions, 0 deletions
diff --git a/rust/kernel/sync/arc.rs b/rust/kernel/sync/arc.rs
index b03d84f7ce87..ace478442998 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.