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Rollup merge of #90625 - Milo123459:ref-unwind-safe, r=dtolnay

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Add `UnwindSafe` to `Once`

Fixes #43469
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Matthias Krüger 2021-12-23 17:48:29 +01:00 committed by GitHub
commit 40c6720620
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7
library/std/src/sync/once.rs
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@ -90,6 +90,7 @@ mod tests;
use crate::cell::Cell;
use crate::fmt;
use crate::marker;
use crate::panic::{RefUnwindSafe, UnwindSafe};
use crate::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
use crate::thread::{self, Thread};
@ -123,6 +124,12 @@ unsafe impl Sync for Once {}
#[stable(feature = "rust1", since = "1.0.0")]
unsafe impl Send for Once {}
#[stable(feature = "sync_once_unwind_safe", since = "1.59.0")]
impl UnwindSafe for Once {}
#[stable(feature = "sync_once_unwind_safe", since = "1.59.0")]
impl RefUnwindSafe for Once {}
/// State yielded to [`Once::call_once_force()`]’s closure parameter. The state
/// can be used to query the poison status of the [`Once`].
#[stable(feature = "once_poison", since = "1.51.0")]