class Async::Semaphore

def async(*arguments, parent: (@parent or Task.current), **options)

Run an async task. Will wait until the semaphore is ready until spawning and running the task. 
def async(*arguments, parent: (@parent or Task.current), **options)
	wait
	
	parent.async(**options) do |task|
		@count += 1
		
		begin
			yield task, *arguments
		ensure
			self.release
		end
	end
end