MICROUPTIME(9) MidnightBSD Kernel Developer’s Manual MICROUPTIME(9)

NAME

binuptime, getbinuptime, microuptime, getmicrouptime, nanouptime, getnanouptime — get the time elapsed since boot

SYNOPSIS

#include <sys/time.h>

void

binuptime(struct bintime *bt);

void

getbinuptime(struct bintime *bt);

void

microuptime(struct timeval *tv);

void

getmicrouptime(struct timeval *tv);

void

nanouptime(struct timespec *ts);

void

getnanouptime(struct timespec *tsp);

DESCRIPTION

The binuptime() and getbinuptime() functions store the time elapsed since boot as a struct bintime at the address specified by bt. The microuptime() and getmicrouptime() functions perform the same utility, but record the elapsed time as a struct timeval instead. Similarly the nanouptime() and getnanouptime() functions store the elapsed time as a struct timespec.

The binuptime(), microuptime(), and nanouptime() functions always query the timecounter to return the current time as precisely as possible. Whereas getbinuptime(), getmicrouptime(), and getnanouptime() functions are abstractions which return a less precise, but faster to obtain, time.

The intent of the getbinuptime(), getmicrouptime(), and getnanouptime() functions is to enforce the user’s preference for timer accuracy versus execution time.

SEE ALSO

bintime(9), getbintime(9), getmicrotime(9), getnanotime(9), microtime(9), nanotime(9), tvtohz(9)

AUTHORS

This manual page was written by Kelly Yancey 〈kbyanc@posi.net〉.

MidnightBSD 0.3 September 16, 2004 MidnightBSD 0.3