def stopupdateloop(self, wlan):
        self.updatelock.acquire()
        try:
            del self.last_update_time[wlan]
        except KeyError:
            pass
        self.updatelock.release()
        if len(self.last_update_time) > 0:
            return
        self.doupdateloop = False
        if self.updatethread:
            self.updatethread.join()
            self.updatethread = None
Kill the update loop thread if there are no more WLANs using it.
dataset/ETHPy150Open coreemu/core/daemon/core/netns/vnet.py/EbtablesQueue.stopupdateloop