正在构建MC服务器状态机

state.go

@@ -0,0 +1,76 @@
+package main
+
+import (
+	"reflect"
+	"runtime/debug"
+)
+
+type MCState int
+
+const (
+	STOPPED MCState = iota
+	RUNNING
+	BOOTING
+	WAITING
+	STOPPING
+)
+const QUERY = 114514
+
+type CntEvent int
+
+const (
+	INCREASE CntEvent = 1
+	DECREASE CntEvent = -1
+)
+
+type StateEvent int
+
+const (
+	INCOMING StateEvent = iota
+	EMPTY
+)
+
+type QueryChan chan MCState
+
+var (
+	state MCState = STOPPED
+	// we don't need mutex for cnt because with channel it's guaranteed to be processed sequently
+	CntChan   = make(chan CntEvent)
+	eventChan = make(chan StateEvent)
+	// the channel used to pass channel to build directional communication
+	ChanChan = make(chan QueryChan)
+)
+var cnt int
+
+func InitState() {
+	go handleCnt()
+	go handleEvent()
+}
+func handleCnt() {
+	for {
+		cntEvent := <-CntChan
+		switch cntEvent {
+		case INCREASE:
+			cnt++
+			if cnt == 1 { //which means it is 0->1
+				eventChan <- INCOMING
+			}
+		case DECREASE:
+			cnt--
+			if cnt < 0 {
+				debug.Stack()
+				panic("cnt processor was written wrong!")
+			} else if cnt == 0 {
+				eventChan <- EMPTY
+			}
+		}
+	}
+}
+func handleEvent() { //handles both write and read
+	var chanList []QueryChan
+	// TODO: create chanList vector
+	for {
+
+	}
+
+}