diff options
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 . |