package util

import "sync"

type SerialQueue struct {
	items [][]byte
	lock  sync.Mutex
}

func (q *SerialQueue) Enqueue(item []byte) {
	q.lock.Lock()
	defer q.lock.Unlock()
	q.items = append(q.items, item)
}

func (q *SerialQueue) Dequeue() ([]byte, bool) {
	q.lock.Lock()
	defer q.lock.Unlock()
	if len(q.items) == 0 {
		return nil, false
	}
	item := q.items[0]
	q.items = q.items[1:]
	return item, true
}