Added atomic boolean type to atomic package

pkg/util/atomic/atomicbool.go

@@ -0,0 +1,42 @@
+package atomic
+
+import (
+	"sync/atomic"
+)
+
+// AtomicBool alias leverages a 32-bit integer CAS
+type AtomicBool int32
+
+// NewAtomicBool creates an AtomicBool with given default value
+func NewAtomicBool(value bool) *AtomicBool {
+	ab := new(AtomicBool)
+	ab.Set(value)
+	return ab
+}
+
+// Loads the bool value atomically
+func (ab *AtomicBool) Get() bool {
+	return atomic.LoadInt32((*int32)(ab)) != 0
+}
+
+// Sets the bool value atomically
+func (ab *AtomicBool) Set(value bool) {
+	if value {
+		atomic.StoreInt32((*int32)(ab), 1)
+	} else {
+		atomic.StoreInt32((*int32)(ab), 0)
+	}
+}
+
+// CompareAndSet sets value to new if current is equal to the current value. If the new value is
+// set, this function returns true.
+func (ab *AtomicBool) CompareAndSet(current, new bool) bool {
+	var o, n int32
+	if current {
+		o = 1
+	}
+	if new {
+		n = 1
+	}
+	return atomic.CompareAndSwapInt32((*int32)(ab), o, n)
+}