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Fix unsound lock guard: Remove Send and Sync autotraits from the lock guard #8

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merged 1 commit into from Jan 6, 2023
Merged

Fix unsound lock guard: Remove Send and Sync autotraits from the lock guard #8

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4 changes: 4 additions & 0 deletions src/lib.rs
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Expand Up @@ -51,6 +51,7 @@ use core::cell::UnsafeCell;
use core::fmt;
use core::ops::{Deref, DerefMut};
use core::sync::atomic::{AtomicBool, Ordering};
use core::marker::PhantomData;

/// A light-weight lock guarded by an atomic boolean.
///
Expand Down Expand Up @@ -167,6 +168,7 @@ impl<T> TryLock<T> {
Some(Locked {
lock: self,
order: unlock_order,
_p: PhantomData,
})
} else {
None
Expand Down Expand Up @@ -224,6 +226,8 @@ impl<T: fmt::Debug> fmt::Debug for TryLock<T> {
pub struct Locked<'a, T: 'a> {
lock: &'a TryLock<T>,
order: Ordering,
/// Suppresses Send and Sync autotraits for `struct Locked`.
_p: PhantomData<*mut T>,
}

impl<'a, T> Deref for Locked<'a, T> {
Expand Down