added Flag, a simple atomic "bool"

lukekalbfleisch · Sep 12, 2014 · f94073d · f94073d
1 parent 4de148b
commit f94073d
Showing 1 changed file with 26 additions and 0 deletions.
diff --git a/sync/flag.go b/sync/flag.go
@@ -0,0 +1,26 @@
+package sync
+
+import "sync/atomic"
+
+type Flag struct {
+	f uint32
+}
+
+func (a *Flag) Set() {
+	atomic.StoreUint32(&a.f, 1)
+}
+
+func (a *Flag) Clear() {
+	atomic.StoreUint32(&a.f, 0)
+}
+
+func (a *Flag) IsSet() bool {
+	return atomic.LoadUint32(&a.f) == 1
+}
+
+func (a *Flag) String() string {
+	if a.IsSet() {
+		return "true"
+	}
+	return "false"
+}