class Async::Condition

def wait
	fiber = Fiber.current
	
	@waiting << fiber
	Task.yield
	
	# It would be nice if there was a better construct for this. We only need to invoke #delete if the task was not resumed normally. This can only occur with `raise` and `throw`. But there is no easy way to detect this.
# ensure when not return or ensure when raise, throw
rescue Exception
	@waiting.delete(fiber)
	raise
end