class Async::Queue

A queue which allows items to be processed in order.

def dequeue 

def dequeue
	while @items.empty?
		self.wait
	end
	
	@items.shift
end

def enqueue item 

def enqueue item
	@items.push(item)
	
	self.signal unless self.empty?
end

def initialize 

def initialize
	super
	
	@items = []
end