From 9b988c9094df18a75537f5c4ae12449062550290 Mon Sep 17 00:00:00 2001
From: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Date: Wed, 17 Aug 2022 16:21:00 +0700
Subject: [PATCH] runtime: convert windows netpollWakeSig to atomic type

Updates #53821

Change-Id: Ifc5bc551a4bcf82bf10d2e670ad2644eb9c6b334
Reviewed-on: https://go-review.googlesource.com/c/go/+/423879
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
---
 src/runtime/netpoll_windows.go | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/runtime/netpoll_windows.go b/src/runtime/netpoll_windows.go
index 7e4664909cc..796bf1dd195 100644
--- a/src/runtime/netpoll_windows.go
+++ b/src/runtime/netpoll_windows.go
@@ -35,7 +35,7 @@ type overlappedEntry struct {
 var (
 	iocphandle uintptr = _INVALID_HANDLE_VALUE // completion port io handle
 
-	netpollWakeSig uint32 // used to avoid duplicate calls of netpollBreak
+	netpollWakeSig atomic.Uint32 // used to avoid duplicate calls of netpollBreak
 )
 
 func netpollinit() {
@@ -68,7 +68,7 @@ func netpollarm(pd *pollDesc, mode int) {
 
 func netpollBreak() {
 	// Failing to cas indicates there is an in-flight wakeup, so we're done here.
-	if !atomic.Cas(&netpollWakeSig, 0, 1) {
+	if !netpollWakeSig.CompareAndSwap(0, 1) {
 		return
 	}
 
@@ -136,7 +136,7 @@ func netpoll(delay int64) gList {
 			}
 			handlecompletion(&toRun, op, errno, qty)
 		} else {
-			atomic.Store(&netpollWakeSig, 0)
+			netpollWakeSig.Store(0)
 			if delay == 0 {
 				// Forward the notification to the
 				// blocked poller.