# File lib/slave.rb, line 175
      def initialize
        @pair = Socket.pair(Socket::AF_UNIX, Socket::SOCK_STREAM, 0)
        @owner = Process.pid
        @pid = nil
        @socket = nil
        @object_id = object_id

        @fds = @pair.map{|s| s.fileno}
        oid, fds = @object_id, @fds
        FDS[oid] = fds 
        ObjectSpace.define_finalizer(self){ FDS.delete oid } 
      end