The New method

The New method on Queue initializes message, queuePass, and queueTicket with nil values. The make method creates a Queue with a chan integer parameter, as follows:

// New method initializes queue
func (queue *Queue) New() {
 queue.message = make(chan int)
 queue.queuePass= make(chan int)
 queue.queueTicket= make(chan int)
 }

In the following code example, the Go routine handles selecting the message based on the type of message and the respective queue to process it:

go func() {
 var message int
 for {
 select {
 case message = <-queue.message:
 switch message {
 case messagePassStart:
 queue.waitPass++
 case messagePassEnd:
 queue.playPass = false
 case messageTicketStart:
 queue.waitTicket++
 case messageTicketEnd:
 queue.playTicket = false
 }
 if queue.waitPass > 0 && queue.waitTicket > 0 && !queue.playPass && !queue.playTicket {
 queue.playPass = true
 queue.playTicket = true
 queue.waitTicket--
 queue.waitPass--
 queue.queuePass <- 1
 queue.queueTicket <- 1
 }
 }
 }
 }()
}