func (k *kvChannelIndex) getChannelClock() (base.SequenceClock, error) {
var channelClock base.SequenceClock
var err error
// If we're polling, return a copy
k.lastPolledLock.RLock()
defer k.lastPolledLock.RUnlock()
if k.lastPolledChannelClock != nil {
channelClock = base.NewSequenceClockImpl()
channelClock.SetTo(k.lastPolledChannelClock)
} else {
channelClock, err = k.loadChannelClock()
if err != nil {
return nil, err
}
}
return channelClock, nil
}
