clock_gethrtime.3

上传的是rtlinux的源码包

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.TH "clock_gethrtime" "3" 
.SH "NAME" 
clock_gethrtime \(em get high resolution time using the specified clock 
.SH "SYNOPSIS" 
.PP 
.nf 
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#include <rtl_time.h> 
 
hrtime_t \fBclock_gethrtime\fP(clockid_t \fBclock\fR); 
.fi 
.SH "DESCRIPTION" 
.PP 
This function is a non-portable RTLinux extension.  \fBclock_gethrtime\fP returns the clock reading in nanoseconds.  This is a convenience function for \fBclock_gettime(3)\fP 
.PP 
\fBhrtime_t\fR is a 64-bit signed integer. 
.SH "NOTES" 
.PP 
The following clocks are supported by this release of RTLinux: 
.IP "CLOCK_REALTIME" 10 
This is the standard POSIX realtime clock. The values 
returned by clock_gettime for this clock represent the 
time elapsed since the Epoch. This clock can be adjusted with 
the \fBclock_settime(3)\fP function. 
.IP "CLOCK_MONOTONIC" 10 
This POSIX clock runs at a steady rate, and is never  
adjusted or reset. 
.IP "CLOCK_RTL_SCHED" 10 
The clock that the scheduler uses for task scheduling. 
The time values passed to pthread_make_periodic_np are normally specified  
relative to this clock. 
.SH "AUTHOR" 
.PP 
Michael Barabanov (\[e-mail] (link to URL mailto:[e-mail]) \fR) 
.SH "SEE ALSO" 
\fIrtl_getschedclock(3) (link to URL rtl_getschedclock.3.html) \fR, \fIrtl_setclockmode(3) (link to URL rtl_setclockmode.3.html) \fR, \fIUNIX spec clock_gettime(3) (link to URL ../susv2/xsh/clock_gettime.html) \fR 
.PP 
\(co2001 FSMLabs Inc. 
.PP 
All rights reserved. 
...\" created by instant / docbook-to-man, Wed 13 Jun 2001, 17:57