getmicrouptime

MICROUPTIME(9)            BSD 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>.

BSD                            September 16, 2004                            BSD