add read write lock to dmx data

models/dmx.go

@@ -1,12 +1,27 @@
 package models
 
-type DMX []byte
+import "sync"
+
+type DMX struct {
+	Data []byte
+	mu   sync.Mutex
+}
 
 func NewDMXUniverse() *DMX {
-	dmx := make(DMX, 512)
-	return &dmx
+	return &DMX{
+		Data: make([]byte, 512),
+	}
+}
+
+func (d *DMX) GetDMXData() (data []byte) {
+	d.mu.Lock()
+	data = d.Data
+	d.mu.Unlock()
+	return data
 }
 
 func (d *DMX) SetValue(channel uint, value uint8) {
-	(*d)[channel] = value
+	d.mu.Lock()
+	d.Data[channel] = value
+	d.mu.Unlock()
 }