class Async::HTTP::Protocol::HTTP2::Output

def write(chunk)
	until chunk.empty?
		maximum_size = @stream.available_frame_size
		
		# We try to avoid synchronization if possible:
		if maximum_size <= 0
			@guard.synchronize do
				maximum_size = @stream.available_frame_size
				
				while maximum_size <= 0
					@window_updated.wait(@guard)
					
					maximum_size = @stream.available_frame_size
				end
			end
		end
		
		break unless chunk = send_data(chunk, maximum_size)
	end
end