func (w *GCWorker) getOracleTime() (time.Time, error) {
currentVer, err := w.store.CurrentVersion()
if err != nil {
return time.Time{}, errors.Trace(err)
}
physical := oracle.ExtractPhysical(currentVer.Ver)
sec, nsec := physical/1e3, (physical%1e3)*1e6
return time.Unix(sec, nsec), nil
}
func (o *mockOracle) GetTimestamp() (uint64, error) {
o.Lock()
defer o.Unlock()
if o.stop {
return 0, errors.Trace(errStopped)
}
physical := oracle.GetPhysical(time.Now().Add(o.offset))
ts := oracle.ComposeTS(physical, 0)
if oracle.ExtractPhysical(o.lastTS) == physical {
ts = o.lastTS + 1
}
o.lastTS = ts
return ts, nil
}
// IsExpired returns whether lockTS+TTL is expired, both are ms. It uses `lastTS`
// to compare, may return false negative result temporarily.
func (o *pdOracle) IsExpired(lockTS, TTL uint64) bool {
o.mu.RLock()
defer o.mu.RUnlock()
return oracle.ExtractPhysical(o.mu.lastTS) >= oracle.ExtractPhysical(lockTS)+int64(TTL)
}
func (l *localOracle) IsExpired(lockTS uint64, TTL uint64) bool {
return oracle.GetPhysical(time.Now()) >= oracle.ExtractPhysical(lockTS)+int64(TTL)
}
func (o *mockOracle) IsExpired(lockTimestamp uint64, TTL uint64) bool {
o.RLock()
defer o.RUnlock()
return oracle.GetPhysical(time.Now().Add(o.offset)) >= oracle.ExtractPhysical(lockTimestamp)+int64(TTL)
}