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Add spin_loop_hint in register spinlock #1

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Add spin_loop_hint in register spinlock #1

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5 changes: 4 additions & 1 deletion src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@

use std::cell::UnsafeCell;
use std::fmt;
use std::sync::atomic::AtomicUsize;
use std::sync::atomic::{self, AtomicUsize};
use std::sync::atomic::Ordering::{Acquire, Release, AcqRel};
use std::task::Waker;

Expand Down Expand Up @@ -330,6 +330,9 @@ impl AtomicWaker {
// could also spin here trying to acquire the lock
// to register).
waker.wake_by_ref();

// This is equivalent to a spin lock, so use a spin hint.
atomic::spin_loop_hint();
}
state => {
// In this case, a concurrent thread is holding the
Expand Down