Function watchdogScheduleSignal

app/redis-6.2.6/src/debug.c:1931–1941

Schedule a SIGALRM delivery after the specified period in milliseconds. * If a timer is already scheduled, this function will re-schedule it to the * specified time. If period is 0 the current timer is disabled. */

 * If a timer is already scheduled, this function will re-schedule it to the
 * specified time. If period is 0 the current timer is disabled. */
void watchdogScheduleSignal(int period) {
    struct itimerval it;

    /* Will stop the timer if period is 0. */
    it.it_value.tv_sec = period/1000;
    it.it_value.tv_usec = (period%1000)*1000;
    /* Don't automatically restart. */
    it.it_interval.tv_sec = 0;
    it.it_interval.tv_usec = 0;
    setitimer(ITIMER_REAL, &it, NULL);
}

/* Enable the software watchdog with the specified period in milliseconds. */
void enableWatchdog(int period) {