module Protocol::HTTP2::FlowControlled

def consume_remote_window(frame)
	amount = frame.length
	
	# Frames with zero length with the END_STREAM flag set (that is, an empty DATA frame) MAY be sent if there is no available space in either flow-control window.
	if amount.zero? and frame.end_stream?
		# It's okay, we can send. No need to consume, it's empty anyway.
	elsif amount >= 0 and amount <= @remote_window.available
		@remote_window.consume(amount)
	else
		raise FlowControlError, "Trying to send #{frame.length} bytes, exceeded window size: #{@remote_window.available} (#{@remote_window})"
	end
end