Copyright (c) 2000 Kelly Yancey
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
$FreeBSD$
.Dd September 16, 2004 .Dt MICROUPTIME 9 .Os .Sh NAME .Nm binuptime , .Nm getbinuptime , .Nm microuptime , .Nm getmicrouptime , .Nm nanouptime , .Nm getnanouptime .Nd get the time elapsed since boot .Sh SYNOPSIS n sys/time.h .Ft void .Fn binuptime "struct bintime *bt" .Ft void .Fn getbinuptime "struct bintime *bt" .Ft void .Fn microuptime "struct timeval *tv" .Ft void .Fn getmicrouptime "struct timeval *tv" .Ft void .Fn nanouptime "struct timespec *ts" .Ft void .Fn getnanouptime "struct timespec *tsp" .Sh DESCRIPTION The .Fn binuptime and .Fn getbinuptime functions store the time elapsed since boot as a .Vt "struct bintime" at the address specified by .Fa bt . The .Fn microuptime and .Fn getmicrouptime functions perform the same utility, but record the elapsed time as a .Vt "struct timeval" instead. Similarly the .Fn nanouptime and .Fn getnanouptime functions store the elapsed time as a .Vt "struct timespec" .
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
$FreeBSD$
.Dd September 16, 2004 .Dt MICROUPTIME 9 .Os .Sh NAME .Nm binuptime , .Nm getbinuptime , .Nm microuptime , .Nm getmicrouptime , .Nm nanouptime , .Nm getnanouptime .Nd get the time elapsed since boot .Sh SYNOPSIS n sys/time.h .Ft void .Fn binuptime "struct bintime *bt" .Ft void .Fn getbinuptime "struct bintime *bt" .Ft void .Fn microuptime "struct timeval *tv" .Ft void .Fn getmicrouptime "struct timeval *tv" .Ft void .Fn nanouptime "struct timespec *ts" .Ft void .Fn getnanouptime "struct timespec *tsp" .Sh DESCRIPTION The .Fn binuptime and .Fn getbinuptime functions store the time elapsed since boot as a .Vt "struct bintime" at the address specified by .Fa bt . The .Fn microuptime and .Fn getmicrouptime functions perform the same utility, but record the elapsed time as a .Vt "struct timeval" instead. Similarly the .Fn nanouptime and .Fn getnanouptime functions store the elapsed time as a .Vt "struct timespec" .
p The .Fn binuptime , .Fn microuptime , and .Fn nanouptime functions always query the timecounter to return the current time as precisely as possible. Whereas .Fn getbinuptime , .Fn getmicrouptime , and .Fn getnanouptime functions are abstractions which return a less precise, but faster to obtain, time.
p The intent of the .Fn getbinuptime , .Fn getmicrouptime , and .Fn getnanouptime functions is to enforce the user's preference for timer accuracy versus execution time. .Sh SEE ALSO .Xr bintime 9 , .Xr getbintime 9 , .Xr getmicrotime 9 , .Xr getnanotime 9 , .Xr microtime 9 , .Xr nanotime 9 , .Xr tvtohz 9 .Sh AUTHORS This manual page was written by .An Kelly Yancey Aq kbyanc@posi.net .