tried simplified protocol, testing

conn.go

@@ -33,7 +33,7 @@ func bridge() {
 		clientSignalChan.TX <- msg
 	}
 }
-func handle(clientOriginal net.Conn) {
+func handleConn(clientOriginal net.Conn) {
 	client := timeoutConn{clientOriginal}
 	defer clientOriginal.Close()
 	queryChan := make(QueryChan)
@@ -66,18 +66,16 @@ func handle(clientOriginal net.Conn) {
 		wg.Wait()
 		GetLogger().Infof("Connection from %s closed", clientOriginal.RemoteAddr())
 	}
+	CntChan <- INCREASE
+	defer func() { CntChan <- DECREASE }()
 	queryChan <- STOPPED
 	st, _ := <-queryChan
 	switch st {
 	case RUNNING:
-		CntChan <- INCREASE
-		defer func() { CntChan <- DECREASE }()
 		proceed()
 	case STOPPED, WAITING:
 		//	client.Write([]byte("Server not ready!"))
 		GetLogger().Infof("Connection queued, server currently at %s state", stateToStr[state])
-		CntChan <- INCREASE
-		defer func() { CntChan <- DECREASE }()
 		curChan := make(chan MCState)
 		defer close(curChan)
 		clientSignalChan.Add(curChan)
@@ -106,6 +104,6 @@ func Listen() {
 		}
 		//conn.SetReadDeadline(time.Now().Add(time.Duration(config.ConnectTimeout) * time.Second))
 		GetLogger().Infof("New connection from %s", conn.RemoteAddr())
-		go handle(conn)
+		go handleConn(conn)
 	}
 }

ds.go

@@ -79,26 +79,22 @@ func NewDynamicMultiChan[T constraints.Ordered](reply bool, m int) *DynamicMulti
 		modify: make(chan modify_t[T]),
 	}
 	mode := m
-	reloadTX := make(chan struct{})
+	reload := make(chan struct{})
-	reloadRX := make(chan struct{})
 	used := make(map[int]bool)
 	unused := make(map[int]bool)
-	delta := -1
+	// delta := -1
 	list := make([]chan T, 0)
 	selectCases := make([]reflect.SelectCase, 1)
+	viewCnt := 0
+	addChan := make(chan int, 1)
 	go func() {
 		for {
 			modification, _ := <-ret.modify
 			op := modification.op
 			id := modification.id
 			ch := modification.ch
-			reloadTX <- struct{}{}
+			for range viewCnt {
-			if mode == 2 {
+				reload <- struct{}{}
-				reloadTX <- struct{}{}
-			}
-			<-reloadRX // ok it's safe to do operation
-			if mode == 2 {
-				<-reloadRX
 			}
 			switch op {
 			case ADD:
@@ -108,7 +104,7 @@ func NewDynamicMultiChan[T constraints.Ordered](reply bool, m int) *DynamicMulti
 					Send: reflect.Value{},
 				}
 				if len(unused) == 0 {
-					delta = len(list)
+					addChan <- len(list)
 					used[len(list)] = true
 					list = append(list, ch)
 					selectCases = append(selectCases, nelem)
@@ -118,7 +114,7 @@ func NewDynamicMultiChan[T constraints.Ordered](reply bool, m int) *DynamicMulti
 						which = x
 						break
 					}
-					delta = which
+					addChan <- which
 					used[which] = true
 					delete(unused, which)
 					list[which] = ch
@@ -135,21 +131,17 @@ func NewDynamicMultiChan[T constraints.Ordered](reply bool, m int) *DynamicMulti
 				}
 				//deleted <- struct{}{} // <-reloadTX //extra communication
 			}
-			reloadTX <- struct{}{}
+			for range viewCnt {
-			if mode == 2 {
+				reload <- struct{}{}
-				reloadTX <- struct{}{} //I'm finished
 			}
-			<-reloadRX
+
-			if mode == 2 {
-				<-reloadRX //ok I'll cleanup
-			}
-			delta = -1
 		}
 	}()
 	go func() {
+		viewCnt++
 		selectCases[0] = reflect.SelectCase{
 			Dir:  reflect.SelectRecv,
-			Chan: reflect.ValueOf(reloadTX),
+			Chan: reflect.ValueOf(reload),
 		}
 		prevId := -1
 		for {
@@ -164,10 +156,10 @@ func NewDynamicMultiChan[T constraints.Ordered](reply bool, m int) *DynamicMulti
 				//
 				// delete(used, id)
 				ret.modify <- modify_t[T]{DELETE, id - 1, nil}
-				<-reloadTX
+				<-reload
-				reloadRX <- struct{}{} //I'm currently not dealing with other chan
+				// reloadRX <- struct{}{} //I'm currently not dealing with other chan
-				<-reloadTX             //waiting for you finished
+				<-reload //waiting for you finished
-				reloadRX <- struct{}{} //I've read all deltas, you can release them
+				// reloadRX <- struct{}{} //I've read all deltas, you can release them
 				continue
 			}
 			if mode == 1 && id != 0 {
@@ -179,9 +171,9 @@ func NewDynamicMultiChan[T constraints.Ordered](reply bool, m int) *DynamicMulti
 					prevId = id
 				}
 			} else if id == 0 {
-				reloadRX <- struct{}{} //I'm currently not dealing with other chan
+				// reloadRX <- struct{}{} //I'm currently not dealing with other chan
-				<-reloadTX             //waiting for you finished
+				<-reload //waiting for you finished
-				reloadRX <- struct{}{} //I've read all deltas, you can release them
+				// reloadRX <- struct{}{} //I've read all deltas, you can release them
 			}
 		}
 	}()
@@ -190,15 +182,16 @@ func NewDynamicMultiChan[T constraints.Ordered](reply bool, m int) *DynamicMulti
 			msgList := make([]T, 0)
 			for {
 				select {
-				case <-reloadTX:
+				case <-reload:
-					reloadRX <- struct{}{} //I'm currently not dealing with other chan
+					// reloadRX <- struct{}{} //I'm currently not dealing with other chan
-					<-reloadTX             //waiting for you finished
+					<-reload //waiting for you finished
+					delta, _ := <-addChan
 					if delta != -1 {
 						for _, x := range msgList {
 							list[delta] <- x
 						}
 					}
-					reloadRX <- struct{}{} //I've read all deltas, you can release them
+					// reloadRX <- struct{}{} //I've read all deltas, you can release them
 				case msg, _ := <-ret.TX:
 					for id, ch := range list {
 						if used[id] {

fsm.go

@@ -137,7 +137,7 @@ func handleState() { //goroutine only, handles both write and read
 					handleWaitingToRunning()
 				//case RUNNING:
 				default:
-					panic("handleState():written wrong!" + stateToStr[state])
+					//panic("handleState():written wrong!" + stateToStr[state])
 				}
 			case EMPTY:
 				switch state {
@@ -145,7 +145,7 @@ func handleState() { //goroutine only, handles both write and read
 					handleRunningToWaiting()
 				//case BOOTING:
 				default:
-					panic("handleState():written wrong!" + stateToStr[state])
+					//panic("handleState():written wrong!" + stateToStr[state])
 				}
 			}
 		case <-multiChan.RX: