# File lib/packet/packet_core.rb, line 154
      def schedule_write(t_sock,internal_instance = nil)
        fileno = t_sock.fileno
        if UNIXSocket === t_sock && internal_scheduled_write[fileno].nil?
          write_ios << t_sock
          internal_scheduled_write[t_sock.fileno] ||= internal_instance
        elsif write_scheduled[fileno].nil? && !(t_sock.is_a?(UNIXSocket))
          write_ios << t_sock
          write_scheduled[fileno] ||= connections[fileno][:instance]
        end
      end