init: 1.0.0

pkg/syncx/once.go

@@ -0,0 +1,11 @@
+package syncx
+
+import "sync"
+
+// Once returns a func that guarantees fn can only called once.
+func Once(fn func()) func() {
+	once := new(sync.Once)
+	return func() {
+		once.Do(fn)
+	}
+}