diff --git a/x/async/async.go b/x/async/async.go
index 268bce60..fcd9a2e9 100644
--- a/x/async/async.go
+++ b/x/async/async.go
@@ -25,6 +25,6 @@ type Void = [0]byte
 type Future[T any] func(func(T))
 
 // Just for pure LLGo/Go, transpile to callback in Go+
-func Await[T1 any](call Future[T1]) (ret T1) {
-	return Run(call)
+func Await[T1 any](future Future[T1]) T1 {
+	return Run(future)
 }
diff --git a/x/async/executor_go.go b/x/async/executor_go.go
index cd9fb891..60962638 100644
--- a/x/async/executor_go.go
+++ b/x/async/executor_go.go
@@ -19,16 +19,7 @@
 
 package async
 
-var exec = &Executor{}
-
-type Executor struct {
-}
-
-func Exec() *Executor {
-	return exec
-}
-
-func Run[T any](future Future[T]) (ret T) {
+func Run[T any](future Future[T]) T {
 	ch := make(chan T)
 	go func() {
 		future(func(v T) {
diff --git a/x/async/executor_llgo.go b/x/async/executor_llgo.go
index fd5e4e14..e1e03a6a 100644
--- a/x/async/executor_llgo.go
+++ b/x/async/executor_llgo.go
@@ -54,15 +54,16 @@ func (e *Executor) Run() {
 	e.L.Run(libuv.RUN_DEFAULT)
 }
 
-func Run[T any](future Future[T]) (ret T) {
+func Run[T any](future Future[T]) T {
 	loop := libuv.LoopNew()
 	exec := &Executor{loop}
 	oldExec := setExec(exec)
+	var ret T
 	future(func(v T) {
 		ret = v
 	})
 	exec.Run()
 	loop.Close()
 	setExec(oldExec)
-	return
+	return ret
 }
diff --git a/x/cbind/cbind.go b/x/cbind/cbind.go
index 84b87528..7ec34b99 100644
--- a/x/cbind/cbind.go
+++ b/x/cbind/cbind.go
@@ -52,22 +52,22 @@ type bind3[Base any, A any, B any, C any] struct {
 	fn func(*Base, A, B, C)
 }
 
-func Callback[Base any](base *Base) {
+func callback[Base any](base *Base) {
 	bind := (*bind[Base])(unsafe.Pointer(base))
 	bind.fn(base)
 }
 
-func Callback1[Base any, A any](base *Base, a A) {
+func callback1[Base any, A any](base *Base, a A) {
 	bind := (*bind1[Base, A])(unsafe.Pointer(base))
 	bind.fn(base, a)
 }
 
-func Callback2[Base any, A any, B any](base *Base, a A, b B) {
+func callback2[Base any, A any, B any](base *Base, a A, b B) {
 	bind := (*bind2[Base, A, B])(unsafe.Pointer(base))
 	bind.fn(base, a, b)
 }
 
-func Callback3[Base any, A any, B any, C any](base *Base, a A, b B, c C) {
+func callback3[Base any, A any, B any, C any](base *Base, a A, b B, c C) {
 	bind := (*bind3[Base, A, B, C])(unsafe.Pointer(base))
 	bind.fn(base, a, b, c)
 }
@@ -89,55 +89,55 @@ func Callback3[Base any, A any, B any, C any](base *Base, a A, b B, c C) {
 func Bind[T any](call func(*T)) (p *T, cb Cb[T]) {
 	bb := &bind[T]{fn: call}
 	p = (*T)(unsafe.Pointer(bb))
-	cb = Callback[T]
+	cb = callback[T]
 	return
 }
 
 func BindF[T any, F ~func(*T)](call func(*T)) (*T, F) {
 	bb := &bind[T]{fn: call}
 	p := (*T)(unsafe.Pointer(bb))
-	var fn F = Callback[T]
+	var fn F = callback[T]
 	return p, fn
 }
 
 func Bind1[T any, A any](call func(*T, A)) (p *T, cb Cb1[T, A]) {
 	bb := &bind1[T, A]{fn: call}
 	p = (*T)(unsafe.Pointer(bb))
-	cb = Callback1[T, A]
+	cb = callback1[T, A]
 	return
 }
 
 func Bind1F[T any, F ~func(*T, A), A any](call func(*T, A)) (*T, F) {
 	bb := &bind1[T, A]{fn: call}
 	p := (*T)(unsafe.Pointer(bb))
-	var fn F = Callback1[T, A]
+	var fn F = callback1[T, A]
 	return p, fn
 }
 
 func Bind2[T any, A any, B any](call func(*T, A, B)) (p *T, cb Cb2[T, A, B]) {
 	bb := &bind2[T, A, B]{fn: call}
 	p = (*T)(unsafe.Pointer(bb))
-	cb = Callback2[T, A, B]
+	cb = callback2[T, A, B]
 	return
 }
 
 func Bind2F[T any, F ~func(*T, A, B), A any, B any](call func(*T, A, B)) (*T, F) {
 	bb := &bind2[T, A, B]{fn: call}
 	p := (*T)(unsafe.Pointer(bb))
-	var fn F = Callback2[T, A, B]
+	var fn F = callback2[T, A, B]
 	return p, fn
 }
 
 func Bind3[T any, A any, B any, C any](call func(*T, A, B, C), a A, b B, c C) (p *T, cb Cb3[T, A, B, C]) {
 	bb := &bind3[T, A, B, C]{fn: call}
 	p = (*T)(unsafe.Pointer(bb))
-	cb = Callback3[T, A, B, C]
+	cb = callback3[T, A, B, C]
 	return
 }
 
 func Bind3F[T any, F ~func(*T, A, B, C), A any, B any, C any](call func(*T, A, B, C), a A, b B, c C) (*T, F) {
 	bb := &bind3[T, A, B, C]{fn: call}
 	p := (*T)(unsafe.Pointer(bb))
-	var fn F = Callback3[T, A, B, C]
+	var fn F = callback3[T, A, B, C]
 	return p, fn
 }
diff --git a/x/socketio/socketio_llgo.go b/x/socketio/socketio_llgo.go
index cff5305d..e6b799a5 100644
--- a/x/socketio/socketio_llgo.go
+++ b/x/socketio/socketio_llgo.go
@@ -241,7 +241,7 @@ func (t *Conn) Read() async.Future[tuple.Tuple2[[]byte, error]] {
 
 func (t *Conn) Write(data []byte) async.Future[error] {
 	return async.Async(func(resolve func(error)) {
-		writer, _ := cbind.Bind1[libuv.Write](func(req *libuv.Write, status c.Int) {
+		writer, cb := cbind.Bind1F[libuv.Write, libuv.WriteCb](func(req *libuv.Write, status c.Int) {
 			var result error
 			if status != 0 {
 				result = libuvError(libuv.Errno(status))
@@ -251,7 +251,7 @@ func (t *Conn) Write(data []byte) async.Future[error] {
 		tcp := (*libuv.Stream)(&t.tcp)
 		buf, len := cbind.CBuffer(data)
 		bufs := &libuv.Buf{Base: buf, Len: uintptr(len)}
-		writer.Write(tcp, bufs, 1, cbind.Callback1[libuv.Write, c.Int])
+		writer.Write(tcp, bufs, 1, cb)
 	})
 }