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.\" This -*- nroff -*- file has been generated from
.\" DocBook SGML with docbook-to-man on Debian GNU/Linux.
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.TH "gethrtime" "3"
.SH "NAME"
gethrtime \(em get high resolution time
.SH "SYNOPSIS"
.PP
.nf
.ta 8n 16n 24n 32n 40n 48n 56n 64n 72n
#include <rtl_time.h>
hrtime_t \fBgethrtime\fP(void);
.fi
.SH "Description"
.PP
This function is a non-portable RTLinux extension. \fBgethrtime\fP returns the time in nanoseconds since the system bootup. This time is never reset or adjusted. \fBgethrtime\fP always gives monotonically increasing values. \fBhrtime_t\fR is a 64-bit signed integer.
.PP
The \fBHRTIME_INFINITY\fR symbol represents the maximum possible value that \fBgethrtime()\fP could possibly return. This value will be never reached during the execution of the system, and can be used to designate the infinitely distant moment in time.
.SH "Notes"
.PP
The actual resolution of \fBgethrtime\fP is hardware-dependent. It is guaranteed to be better than 1 microsecond.
.PP
\fBgethrtime\fP is available in PSC, the user-level
real-time signal library. It can be called from handlers installed via
\fIrtlinux_sigaction(3) (link to URL rtlinux_sigaction.3.html) \fR.
.SH "Author"
.PP
Michael Barabanov (\fIbaraban@fsmlabs.com (link to URL mailto:baraban@fsmlabs.com) \fR)
.SH "See Also"
\fIUNIX spec clock_gettime(3) (link to URL ../susv2/xsh/clock_gettime.html) \fR, \fIclock_gethrtime(3) (link to URL clock_gethrtime.3.html) \fR
.PP
\(co2001 FSMLabs Inc.
.PP
All rights reserved.
...\" created by instant / docbook-to-man, Wed 13 Jun 2001, 17:57
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