diff options
| author |   guenther <guenther@openbsd.org> | 2013-10-06 01:27:49 +0000 |
|---|---|---|
| committer | guenther <guenther@openbsd.org> | 2013-10-06 01:27:49 +0000 |
| commit | e206ca2e95145f116d06a0b130e6c30106e6c835 (patch) | |
| tree | e879c5cfe966c130496cfc17873f412cc4532599 /lib/libc/sys | |
| parent | Back out POLLHUP change until a problem with xterm hanging on close (diff) | |
| download | wireguard-openbsd-e206ca2e95145f116d06a0b130e6c30106e6c835.tar.xz wireguard-openbsd-e206ca2e95145f116d06a0b130e6c30106e6c835.zip | |
Add CLOCK_UPTIME, a clock which measures time-running-not-suspended, so
that mlarkin@ can fix programs that report rates-over-uptime.
ok kettenis@
manpage corrections jmc@ (which I've probably broken again)
Diffstat (limited to 'lib/libc/sys')
| -rw-r--r-- | lib/libc/sys/clock_gettime.2 | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/lib/libc/sys/clock_gettime.2 b/lib/libc/sys/clock_gettime.2 index e7b36d7121f..c5d52f0a16c 100644 --- a/lib/libc/sys/clock_gettime.2 +++ b/lib/libc/sys/clock_gettime.2 @@ -1,4 +1,4 @@ -.\" $OpenBSD: clock_gettime.2,v 1.21 2013/06/17 19:11:54 guenther Exp $ +.\" $OpenBSD: clock_gettime.2,v 1.22 2013/10/06 01:27:50 guenther Exp $ .\" .\" Copyright (c) 1980, 1991, 1993 .\" The Regents of the University of California. All rights reserved. @@ -27,7 +27,7 @@ .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" -.Dd $Mdocdate: June 17 2013 $ +.Dd $Mdocdate: October 6 2013 $ .Dt CLOCK_GETTIME 2 .Os .Sh NAME @@ -73,7 +73,13 @@ time that increments when the CPU is running in user or kernel mode on behalf of the calling thread .It Dv CLOCK_MONOTONIC time that increments as a wall clock should but whose absolute value -is meaningless and cannot jump, providing accurate interval measurement +is meaningless and cannot jump, +providing accurate realtime interval measurement, +even across suspend and resume +.It Dv CLOCK_UPTIME +time whose absolute value is the time the system has been running +and not suspended, +providing accurate uptime measurement, both absolute and interval .El .Pp The structure pointed to by @@ -153,3 +159,22 @@ and .Fn clock_settime functions conform to .St -p1003.1-2008 . +.Pp +The +.Dv CLOCK_UPTIME +clock is an extension to that. +.Sh HISTORY +The +.Dv CLOCK_PROCESS_CPUTIME_ID +and +.Dv CLOCK_THREAD_CPUTIME_ID +clocks appeared in +.Ox 5.4 . +The +.Dv CLOCK_UPTIME +clock first appeared in +.Fx 7.0 +and was added to +.Ox +in +.Ox 5.5 . |