Fix compare_and_swap in Windows thread_parker

rust-lang · Dec 22, 2020 · 865e479 · 865e479
1 parent 3eef20f
commit 865e479
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/library/std/src/sys/windows/thread_parker.rs b/library/std/src/sys/windows/thread_parker.rs
@@ -113,7 +113,7 @@ impl Parker {
                 // Wait for something to happen, assuming it's still set to PARKED.
                 c::WaitOnAddress(self.ptr(), &PARKED as *const _ as c::LPVOID, 1, c::INFINITE);
                 // Change NOTIFIED=>EMPTY but leave PARKED alone.
-                if self.state.compare_and_swap(NOTIFIED, EMPTY, Acquire) == NOTIFIED {
+                if self.state.compare_exchange(NOTIFIED, EMPTY, Acquire, Acquire) == NOTIFIED {
                     // Actually woken up by unpark().
                     return;
                 } else {