1.\" Copyright (c) 2000 Kelly Yancey 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.Dd September 16, 2004 26.Dt MICROTIME 9 27.Os 28.Sh NAME 29.Nm bintime , 30.Nm getbintime , 31.Nm microtime , 32.Nm getmicrotime , 33.Nm nanotime , 34.Nm getnanotime 35.Nd get the current time 36.Sh SYNOPSIS 37.In sys/time.h 38.Ft void 39.Fn bintime "struct bintime *bt" 40.Ft void 41.Fn getbintime "struct bintime *bt" 42.Ft void 43.Fn microtime "struct timeval *tv" 44.Ft void 45.Fn getmicrotime "struct timeval *tv" 46.Ft void 47.Fn nanotime "struct timespec *ts" 48.Ft void 49.Fn getnanotime "struct timespec *tsp" 50.Sh DESCRIPTION 51The 52.Fn bintime 53and 54.Fn getbintime 55functions store the system time as a 56.Vt "struct bintime" 57at the addresses specified by 58.Fa bt . 59The 60.Fn microtime 61and 62.Fn getmicrotime 63functions perform the same utility, but record the time as a 64.Vt "struct timeval" 65instead. 66Similarly the 67.Fn nanotime 68and 69.Fn getnanotime 70functions store the time as a 71.Vt "struct timespec" . 72.Pp 73The 74.Fn bintime , 75.Fn microtime , 76and 77.Fn nanotime 78functions 79always query the timecounter to return the current time as precisely as 80possible. 81Whereas 82.Fn getbintime , 83.Fn getmicrotime , 84and 85.Fn getnanotime 86functions are abstractions which return a less precise, but 87faster to obtain, time. 88.Pp 89The intent of the 90.Fn getbintime , 91.Fn getmicrotime , 92and 93.Fn getnanotime 94functions is to enforce the user's preference for timer accuracy versus 95execution time. 96.Sh SEE ALSO 97.Xr binuptime 9 , 98.Xr getbinuptime 9 , 99.Xr getmicrouptime 9 , 100.Xr getnanouptime 9 , 101.Xr microuptime 9 , 102.Xr nanouptime 9 , 103.Xr tvtohz 9 104.Sh HISTORY 105The 106.Nm bintime 107functions first appeared in 108.Fx 5.0 . 109The 110.Nm microtime 111and 112.Nm nanotime 113functions first appeared in 114.Fx 3.0 115but have existed in other incarnations since 116.Bx 4.4 . 117.Sh AUTHORS 118This manual page was written by 119.An Kelly Yancey Aq Mt kbyanc@posi.net . 120