| // Copyright 2015 The Vanadium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package vclock |
| |
| import ( |
| "time" |
| ) |
| |
| // VClockData is the persistent state of the Syncbase virtual clock. |
| // All times are UTC. |
| type VClockData struct { |
| // System time at boot. |
| SystemTimeAtBoot time.Time |
| |
| // Current estimate of NTP time minus system clock time. |
| Skew time.Duration |
| |
| // Elapsed time since boot, as seen by VClockD. Used for detecting reboots. |
| ElapsedTimeSinceBoot time.Duration |
| |
| // NTP server timestamp from the most recent NTP sync, or zero value if none. |
| // Note, the NTP sync may have been performed by some peer device. |
| LastNtpTs time.Time |
| |
| // Number of reboots since last NTP sync, accumulated across all hops of p2p |
| // clock sync. E.g. if LastNtpTs came from some peer device, NumReboots will |
| // equal that device's NumReboots at the time of sync plus the number of |
| // reboots on this device since then. |
| NumReboots uint16 |
| |
| // Number of sync hops between this device and the source of LastNtpTs. |
| NumHops uint16 |
| } |
