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util: improve impl Send for ReusableBoxFuture docs (#4658)

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This commit is contained in:
Alice Ryhl
2022-05-07 22:32:29 +02:00
committed by GitHub
parent 1872a425e2
commit 938b7d6742
1 changed files with 6 additions and 1 deletions
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tokio-util/src/sync/reusable_box.rs
+6 -1
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@@ -122,7 +122,12 @@ impl<T> Future for ReusableBoxFuture<'_, T> {
} }
} }
// The future stored inside ReusableBoxFuture<'_, T> must be Send. // The future stored inside ReusableBoxFuture<'_, T> must be Send since the
// `new` and `set` and `try_set` methods only allow setting the future to Send
// futures.
//
// Note that T is the return type of the future, so its not relevant for
// whether the future itself is Send.
unsafe impl<T> Send for ReusableBoxFuture<'_, T> {} unsafe impl<T> Send for ReusableBoxFuture<'_, T> {}
// The only method called on self.boxed is poll, which takes &mut self, so this // The only method called on self.boxed is poll, which takes &mut self, so this