From 55d9ff989941b4448926662771cdfce8840cf6cf Mon Sep 17 00:00:00 2001
From: "Jeff Washington (jwash)"
 <75863576+jeffwashington@users.noreply.github.com>
Date: Mon, 20 Sep 2021 09:57:57 -0500
Subject: [PATCH] WaitableCondVar supports notify_one (#20013)

---
 runtime/src/waitable_condvar.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/runtime/src/waitable_condvar.rs b/runtime/src/waitable_condvar.rs
index 8ad7e33662..b83441c0c9 100644
--- a/runtime/src/waitable_condvar.rs
+++ b/runtime/src/waitable_condvar.rs
@@ -15,6 +15,9 @@ impl WaitableCondvar {
     pub fn notify_all(&self) {
         self.event.notify_all();
     }
+    pub fn notify_one(&self) {
+        self.event.notify_one();
+    }
     pub fn wait_timeout(&self, timeout: Duration) -> bool {
         let lock = self.mutex.lock().unwrap();
         let res = self.event.wait_timeout(lock, timeout).unwrap();