Method getUnlockCallback

value.go:1578–1587

getUnlockCallback will returns a function which unlock the logfile if the logfile is mmaped. otherwise, it unlock the logfile and return nil.

(lf *logFile)

// getUnlockCallback will returns a function which unlock the logfile if the logfile is mmaped.
// otherwise, it unlock the logfile and return nil.
func (vlog *valueLog) getUnlockCallback(lf *logFile) func() {
	if lf == nil {
		return nil
	}
	if vlog.opt.ValueLogLoadingMode == options.MemoryMap {
		return lf.lock.RUnlock
	}
	lf.lock.RUnlock()
	return nil
}

// readValueBytes return vlog entry slice and read locked log file. Caller should take care of
// logFile unlocking.