message: define function.
diff: static int swReactorTimer_init(long msec);
  static int swReactorTimer_set(swTimer *timer, long exec_msec);
  static swTimer_node* swTimer_add(swTimer *timer, int _msec, int interval, void *data, swTimerCallback callback);
  +static int swReactorTimer_now(struct timeval *time);
  static int swReactorTimer_now(struct timeval *time)
  {
  