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Implement Send and Sync for ThinBox<T> #98595

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Jun 28, 2022
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Implement Send and Sync for ThinBox<T> #98595

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8 changes: 8 additions & 0 deletions library/alloc/src/boxed/thin.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -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
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