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AtomicWaker: store, not swap if old value is not used #1314

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AtomicWaker: store, not swap if old value is not used #1314

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4 changes: 2 additions & 2 deletions futures-util/src/task/atomic_waker.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -227,8 +227,8 @@ impl AtomicWaker {
// completed.
let waker = (*self.waker.get()).take().unwrap();

// Just swap, because no one could change state while state == `REGISTERING` | `WAKING`.
self.state.swap(WAITING, AcqRel);
// Just store, because no one could change state while state == `REGISTERING` | `WAKING`.
self.state.store(WAITING, Release);

// The atomic swap was complete, now
// wake the task and return.
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