Method Push

12-concurrent-queue-iii/solution/solution.go:23–34

(val int)

}

func (q *Queue) Push(val int) error {
	q.Lock()
	defer q.Unlock()

	if q.w == q.r || q.w%len(q.data) != q.r%len(q.data) {
		q.data[q.w%len(q.data)] = val
		q.w++
		return nil
	} else {
		return ErrQueueFull
	}
}

func (q *Queue) Pop() int {
	q.Lock()