# File lib/em/pure_ruby.rb, line 647
    def self.connect bind_addr, bind_port, host, port
      sd = Socket.new( Socket::AF_INET, Socket::SOCK_STREAM, 0 )
      sd.bind( Socket.pack_sockaddr_in( bind_port, bind_addr ))  if bind_addr

      begin
        # TODO, this assumes a current Ruby snapshot.
        # We need to degrade to a nonblocking connect otherwise.
        sd.connect_nonblock( Socket.pack_sockaddr_in( port, host ))
      rescue Errno::EINPROGRESS
      end
      EvmaTCPClient.new sd
    end