From a8aae649693e6c1a076bdc1959bf0a08552fe135 Mon Sep 17 00:00:00 2001
From: barryz <barryzxb@gmail.com>
Date: Sat, 8 Sep 2018 20:31:55 +0800
Subject: [PATCH] Refine flip method, may be not atomic yet

---
 bool.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/bool.go b/bool.go
index e9e20fa..a57358a 100644
--- a/bool.go
+++ b/bool.go
@@ -51,7 +51,11 @@ func (ab *AtomicBool) SetTo(yes bool) {
 
 // Flip toggles the Boolean (replaces with its opposite value).
 func (ab *AtomicBool) Flip() {
-	atomic.StoreInt32((*int32)(ab), atomic.LoadInt32((*int32)(ab))^1)
+	var o, n int32
+	o, n = 0, 1
+	if !atomic.CompareAndSwapInt32((*int32)(ab), o, n) {
+		atomic.CompareAndSwapInt32((*int32)(ab), n, o)
+	}
 }
 
 // SetToIf sets the Boolean to new only if the Boolean matches the old