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Implement Send and Sync for ThinBox<T>

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Just like `Box<T>`, `ThinBox<T>` owns its data on the heap, so it should
implement `Send` and `Sync` when `T` does.
This commit is contained in:
Josh Stone 2022-06-27 15:49:59 -07:00
parent 2f3ddd9f59
commit 6400736142
1 changed files with 8 additions and 0 deletions
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8
library/alloc/src/boxed/thin.rs
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@ -33,6 +33,14 @@ pub struct ThinBox<T: ?Sized> {
_marker: PhantomData<T>,
}
/// `ThinBox<T>` is `Send` if `T` is `Send` because the data is owned.
#[unstable(feature = "thin_box", issue = "92791")]
unsafe impl<T: ?Sized + Send> Send for ThinBox<T> {}
/// `ThinBox<T>` is `Sync` if `T` is `Sync` because the data is owned.
#[unstable(feature = "thin_box", issue = "92791")]
unsafe impl<T: ?Sized + Sync> Sync for ThinBox<T> {}
#[unstable(feature = "thin_box", issue = "92791")]
impl<T> ThinBox<T> {
/// Moves a type to the heap with its `Metadata` stored in the heap allocation instead of on