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-rw-r--r--rust/kernel/alloc/kvec.rs53
1 files changed, 53 insertions, 0 deletions
diff --git a/rust/kernel/alloc/kvec.rs b/rust/kernel/alloc/kvec.rs
index 606616fc0e59..cb543a61a33c 100644
--- a/rust/kernel/alloc/kvec.rs
+++ b/rust/kernel/alloc/kvec.rs
@@ -8,6 +8,7 @@ use super::{
AllocError, Allocator, Box, Flags,
};
use core::{
+ borrow::{Borrow, BorrowMut},
fmt,
marker::PhantomData,
mem::{ManuallyDrop, MaybeUninit},
@@ -890,6 +891,58 @@ where
}
}
+/// # Examples
+///
+/// ```
+/// # use core::borrow::Borrow;
+/// struct Foo<B: Borrow<[u32]>>(B);
+///
+/// // Owned array.
+/// let owned_array = Foo([1, 2, 3]);
+///
+/// // Owned vector.
+/// let owned_vec = Foo(KVec::from_elem(0, 3, GFP_KERNEL)?);
+///
+/// let arr = [1, 2, 3];
+/// // Borrowed slice from `arr`.
+/// let borrowed_slice = Foo(&arr[..]);
+/// # Ok::<(), Error>(())
+/// ```
+impl<T, A> Borrow<[T]> for Vec<T, A>
+where
+ A: Allocator,
+{
+ fn borrow(&self) -> &[T] {
+ self.as_slice()
+ }
+}
+
+/// # Examples
+///
+/// ```
+/// # use core::borrow::BorrowMut;
+/// struct Foo<B: BorrowMut<[u32]>>(B);
+///
+/// // Owned array.
+/// let owned_array = Foo([1, 2, 3]);
+///
+/// // Owned vector.
+/// let owned_vec = Foo(KVec::from_elem(0, 3, GFP_KERNEL)?);
+///
+/// let mut arr = [1, 2, 3];
+/// // Borrowed slice from `arr`.
+/// let borrowed_slice = Foo(&mut arr[..]);
+/// # Ok::<(), Error>(())
+/// ```
+impl<T, A> BorrowMut<[T]> for Vec<T, A>
+where
+ A: Allocator,
+{
+ fn borrow_mut(&mut self) -> &mut [T] {
+ self.as_mut_slice()
+ }
+}
+
impl<T: Eq, A> Eq for Vec<T, A> where A: Allocator {}
impl<T, I: SliceIndex<[T]>, A> Index<I> for Vec<T, A>