| time.9 (135366) | time.9 (140140) |
|---|---|
| 1.\" $NetBSD: time.9,v 1.1 1995/11/25 21:24:53 perry Exp $ 2.\" 3.\" Copyright (c) 1994 Christopher G. Demetriou 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: --- 15 unchanged lines hidden (view full) --- 24.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31.\" | 1.\" $NetBSD: time.9,v 1.1 1995/11/25 21:24:53 perry Exp $ 2.\" 3.\" Copyright (c) 1994 Christopher G. Demetriou 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: --- 15 unchanged lines hidden (view full) --- 24.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31.\" |
| 32.\" $FreeBSD: head/share/man/man9/time.9 135366 2004-09-17 07:24:18Z brooks $ | 32.\" $FreeBSD: head/share/man/man9/time.9 140140 2005-01-12 21:48:25Z ru $ |
| 33.\" 34.Dd September 17, 2004 35.Dt TIME 9 36.Os 37.Sh NAME | 33.\" 34.Dd September 17, 2004 35.Dt TIME 9 36.Os 37.Sh NAME |
| 38.In sys/time.h | |
| 39.Nm boottime , 40.Nm time_second , 41.Nm time_uptime 42.Nd system time variables 43.Sh SYNOPSIS | 38.Nm boottime , 39.Nm time_second , 40.Nm time_uptime 41.Nd system time variables 42.Sh SYNOPSIS |
| 44.Bl -item -compact 45.It 46.Va extern struct timeval boottime ; 47.It 48.Va extern struct time_t time_second ; 49.It 50.Va extern struct timeval time_uptime ; 51.El | 43.In sys/time.h 44.Pp 45.Vt extern struct timeval boottime ; 46.Vt extern struct time_t time_second ; 47.Vt extern struct timeval time_uptime ; |
| 52.Sh DESCRIPTION 53The 54.Va boottime 55variable holds the system boot time. 56.Pp 57The 58.Va time_second 59variable is the system's 60.Dq wall time 61clock to the second. 62.Pp 63The | 48.Sh DESCRIPTION 49The 50.Va boottime 51variable holds the system boot time. 52.Pp 53The 54.Va time_second 55variable is the system's 56.Dq wall time 57clock to the second. 58.Pp 59The |
| 64.Va time_uptime variable is the number of seconds since boot. | 60.Va time_uptime 61variable is the number of seconds since boot. |
| 65.Pp 66The 67.Xr bintime 9, 68.Xr getbintime 9 , 69.Xr microtime 9 , 70.Xr getmicrotime 9 , 71.Xr nanotime 9 , 72and | 62.Pp 63The 64.Xr bintime 9, 65.Xr getbintime 9 , 66.Xr microtime 9 , 67.Xr getmicrotime 9 , 68.Xr nanotime 9 , 69and |
| 73.Xr getnanotime 9 , | 70.Xr getnanotime 9 |
| 74functions can be used to get the current time more accurately and in an 75atomic manner. 76Similarly, the 77The 78.Xr binuptime 9, 79.Xr getbinuptime 9 , 80.Xr microuptime 9 , 81.Xr getmicrouptime 9 , 82.Xr nanouptime 9 , 83and | 71functions can be used to get the current time more accurately and in an 72atomic manner. 73Similarly, the 74The 75.Xr binuptime 9, 76.Xr getbinuptime 9 , 77.Xr microuptime 9 , 78.Xr getmicrouptime 9 , 79.Xr nanouptime 9 , 80and |
| 84.Xr getnanouptime 9 , | 81.Xr getnanouptime 9 |
| 85functions can be used to get the time elapse since boot more accurately 86and in an atomic manner. 87The 88.Va boottime 89variable may be read and written without special precautions. | 82functions can be used to get the time elapse since boot more accurately 83and in an atomic manner. 84The 85.Va boottime 86variable may be read and written without special precautions. |
| 90.Pp | |
| 91.Sh SEE ALSO 92.Xr clock_settime 2 , 93.Xr ntp_adjtime 2 , 94.Xr settimeofday 2 , 95.Xr getbintime 9 , 96.Xr getbinuptime 9 , 97.Xr getmicrotime 9 , 98.Xr getmicrouptime 9 , 99.Xr getnanotime 9 , 100.Xr getnanouptime 9 , 101.Xr bintime 9 , 102.Xr binuptime 9 , 103.Xr microtime 9 , 104.Xr microuptime 9 , 105.Xr nanotime 9, 106.Xr nanouptime 9 107.Rs 108.%A "Poul-Henning Kamp" 109.%T "Timecounters: Efficient and precise timekeeping in SMP kernels" | 87.Sh SEE ALSO 88.Xr clock_settime 2 , 89.Xr ntp_adjtime 2 , 90.Xr settimeofday 2 , 91.Xr getbintime 9 , 92.Xr getbinuptime 9 , 93.Xr getmicrotime 9 , 94.Xr getmicrouptime 9 , 95.Xr getnanotime 9 , 96.Xr getnanouptime 9 , 97.Xr bintime 9 , 98.Xr binuptime 9 , 99.Xr microtime 9 , 100.Xr microuptime 9 , 101.Xr nanotime 9, 102.Xr nanouptime 9 103.Rs 104.%A "Poul-Henning Kamp" 105.%T "Timecounters: Efficient and precise timekeeping in SMP kernels" |
| 110.%J "Proceedings of EuroBSDCon 2002" 111.%C "Amsterdam" | 106.%J "Proceedings of EuroBSDCon 2002, Amsterdam" |
| 112.%O /usr/share/doc/papers/timecounter.ascii.gz 113.Re 114.Rs 115.%A "Marshall Kirk McKusick" 116.%A "George V. Neville-Neil" 117.%B "The Design and Implementation of the FreeBSD Operating System" 118.%D "July 2004" 119.%I "Addison-Wesley" 120.%P "57-61,65-66" 121.Re | 107.%O /usr/share/doc/papers/timecounter.ascii.gz 108.Re 109.Rs 110.%A "Marshall Kirk McKusick" 111.%A "George V. Neville-Neil" 112.%B "The Design and Implementation of the FreeBSD Operating System" 113.%D "July 2004" 114.%I "Addison-Wesley" 115.%P "57-61,65-66" 116.Re |