Method Push

go/chapter04/queue/queue.go:69–83

Pushes/inserts a value at the end/tail of the queue. Note: this function does mutate the queue. go-routine safe.

(item interface{})

//	Note: this function does mutate the queue.
//	go-routine safe.
func (q *Queue) Push(item interface{}) {
	q.lock.Lock()
	defer q.lock.Unlock()

	n := &queuenode{data: item}

	if q.tail == nil {
		q.tail = n
		q.head = n
	} else {
		q.tail.next = n
		q.tail = n
	}
	q.count++
}

//	Returns the value at the front of the queue.
//	i.e. the oldest value in the queue.