extends Object
class_name Queue

var __queue = []
var busy = false

func append(element)->void :
				if busy:
								return 

				busy = true

				__queue.append(element)

				busy = false

func pop_next():
				if busy:
								return 

				busy = true

				var element = __queue[0]

				__queue.pop_front()

				busy = false

				return element

func is_empty()->bool:
				return __queue.size() == 0