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| author | Connor Tsui <87130162+connortsui20@users.noreply.github.com> | 2024-11-16 12:22:35 -0500 |
|---|---|---|
| committer | Connor Tsui <connor.tsui20@gmail.com> | 2024-11-16 12:31:14 -0500 |
| commit | 782b07e1ff4a4f8ecf00d5e030dfead9222d2185 (patch) | |
| tree | 5f022bdfab0f4130f006356e8258296648e9fca8 /library/std/src/sys/sync | |
| parent | 84fd95cbedf1e1c1826e378ffc4d1a3d335deff4 (diff) | |
| download | rust-782b07e1ff4a4f8ecf00d5e030dfead9222d2185.tar.gz rust-782b07e1ff4a4f8ecf00d5e030dfead9222d2185.zip | |
fix `DOWNGRADED` bit unpreserved
Co-authored-by: Jonas Böttiger <jonasboettiger@icloud.com>
Diffstat (limited to 'library/std/src/sys/sync')
| -rw-r--r-- | library/std/src/sys/sync/rwlock/queue.rs | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/library/std/src/sys/sync/rwlock/queue.rs b/library/std/src/sys/sync/rwlock/queue.rs index c654fca0d6e..51330f8fafe 100644 --- a/library/std/src/sys/sync/rwlock/queue.rs +++ b/library/std/src/sys/sync/rwlock/queue.rs @@ -395,9 +395,9 @@ impl RwLock { node.next.0 = AtomicPtr::new(state.mask(NODE_MASK).cast()); node.prev = AtomicLink::new(None); - // Set the `QUEUED` bit and maintain the `LOCKED` bit. + // Set the `QUEUED` bit and preserve the `LOCKED` and `DOWNGRADED` bit. let mut next = ptr::from_ref(&node) - .map_addr(|addr| addr | QUEUED | (state.addr() & LOCKED)) + .map_addr(|addr| addr | QUEUED | (state.addr() & (DOWNGRADED | LOCKED))) as State; let mut is_queue_locked = false; |