Function GetBSDUptime

util/datetime/uptime.cpp:24–38

    }

    TDuration GetBSDUptime() {
        TInstant beforeNow;
        TInstant afterNow;
        TInstant now;

        // avoid race when NTP changes machine time between getting Now() and uptime
        afterNow = GetBootTime();
        do {
            beforeNow = afterNow;
            now = Now();
            afterNow = GetBootTime();
        } while (afterNow != beforeNow);

        return now - beforeNow;
    }
} // namespace
#endif // _darwin_