sys/kern/kern_time.c

723  * process, and its value (it_value) is kept as an absolute time rather than
733  * therefore, to reload the real timer .it_value from the real time timers
766 		 * Convert from absolute to relative time in .it_value
774 		if (timevalisset(&aitv->it_value)) {
776 			if (timevalcmp(&aitv->it_value, &ctv, <))
777 				timevalclear(&aitv->it_value);
779 				timevalsub(&aitv->it_value, &ctv);
835 	if (itimerfix(&aitv->it_value) ||
836 	    aitv->it_value.tv_sec > INT32_MAX / 2)
838 	if (!timevalisset(&aitv->it_value))
846 		if (timevalisset(&p->p_realtimer.it_value))
849 		if (timevalisset(&aitv->it_value)) {
850 			pr = tvtosbt(aitv->it_value) >> tc_precexp;
851 			timevaladd(&aitv->it_value, &ctv);
852 			sbt = tvtosbt(aitv->it_value);
859 		if (timevalisset(&oitv->it_value)) {
860 			if (timevalcmp(&oitv->it_value, &ctv, <))
861 				timevalclear(&oitv->it_value);
863 				timevalsub(&oitv->it_value, &ctv);
870 		if (aitv->it_value.tv_sec == 0 &&
871 		    aitv->it_value.tv_usec != 0 &&
872 		    aitv->it_value.tv_usec < tick)
873 			aitv->it_value.tv_usec = tick;
892 	callout_reset_sbt(&p->p_itcallout, tvtosbt(p->p_realtimer.it_value),
908 		if (timevalcmp(&p->p_realtimer.it_value, &ctv, >=))
954 		timevalclear(&p->p_realtimer.it_value);
966 		timevaladd(&p->p_realtimer.it_value,
968 	} while (timevalcmp(&p->p_realtimer.it_value, &ctv, <=));
980  * Check that a proposed value to load into the .it_value or
1011 	if (itp->it_value.tv_usec < usec) {
1012 		if (itp->it_value.tv_sec == 0) {
1014 			usec -= itp->it_value.tv_usec;
1017 		itp->it_value.tv_usec += 1000000;
1018 		itp->it_value.tv_sec--;
1020 	itp->it_value.tv_usec -= usec;
1022 	if (timevalisset(&itp->it_value))
1027 		itp->it_value = itp->it_interval;
1028 		itp->it_value.tv_usec -= usec;
1029 		if (itp->it_value.tv_usec < 0) {
1030 			itp->it_value.tv_usec += 1000000;
1031 			itp->it_value.tv_sec--;
1034 		itp->it_value.tv_usec = 0;		/* sec is already 0 */
1270 	timespecclear(&it->it_time.it_value);
1546 	timespecclear(&it->it_time.it_value);
1563 	if (ovalue->it_value.tv_sec != 0 || ovalue->it_value.tv_nsec != 0) {
1564 		timespecsub(&ovalue->it_value, &cts, &ovalue->it_value);
1565 		if (ovalue->it_value.tv_sec < 0 ||
1566 		    (ovalue->it_value.tv_sec == 0 &&
1567 		     ovalue->it_value.tv_nsec == 0)) {
1568 			ovalue->it_value.tv_sec  = 0;
1569 			ovalue->it_value.tv_nsec = 1;
1586 	if (itimespecfix(&val.it_value))
1589 	if (timespecisset(&val.it_value)) {
1600 	if (timespecisset(&val.it_value)) {
1602 		ts = val.it_value;
1605 			timespecadd(&it->it_time.it_value, &cts,
1606 			    &it->it_time.it_value);
1680 	if (timespeccmp(&cts, &it->it_time.it_value, >=)) {
1682 			timespecadd(&it->it_time.it_value,
1684 			    &it->it_time.it_value);
1687 			value = timespectons(&it->it_time.it_value);
1705 				it->it_time.it_value = timespecfromns(value);
1709 			timespecclear(&it->it_time.it_value);
1713 		if (timespecisset(&it->it_time.it_value)) {
1717 				timespecsub(&it->it_time.it_value, &cts, &ts);
1733 	} else if (timespecisset(&it->it_time.it_value)) {
1738 			ts = it->it_time.it_value;
1764 			timespecclear(&it->it_time.it_value);