diff --git a/listhead.go b/listhead.go
index 09b0def..baba1d9 100644
--- a/listhead.go
+++ b/listhead.go
@@ -14,6 +14,10 @@ func (this *ListHead) Init(data interface{}) {
 	this.data = data
 }
 
+func (this *ListHead) GetData() interface{} {
+	return this.data
+}
+
 func (this *ListHead) Del() {
 	this.next.prev = this.prev
 	this.prev.next = this.next
diff --git a/sysutils.go b/sysutils.go
index 1abf756..22f7c4b 100644
--- a/sysutils.go
+++ b/sysutils.go
@@ -30,6 +30,17 @@ func GetTickCount() int64 {
 	return time.Now().UnixNano() / 1e6
 }
 
+func MkUInt16(b1 byte, b2 byte) uint16 {
+	return uint16(b1) + (uint16(b2) << 8)
+}
+
+func MkUInt32(b1 byte, b2 byte, b3 byte, b4 byte) uint32 {
+	return uint32(b1) +
+		(uint32(b2) << 8) +
+		(uint32(b3) << 16) +
+		(uint32(b4) << 24)
+}
+
 func MkInt64(lo32 int32, hi32 int32) int64 {
 	return int64(lo32) + (int64(hi32) << 32)
 }