@c
@c COPYRIGHT (c) 1996.
@c On-Line Applications Research Corporation (OAR).
@c All rights reserved.
@c
@ifinfo
@node Clock Manager, Clock Manager Introduction, pthread_getspecific, Top
@end ifinfo
@chapter Clock Manager
@ifinfo
@menu
* Clock Manager Introduction::
* Clock Manager Background::
* Clock Manager Operations::
* Clock Manager Directives::
@end menu
@end ifinfo
@ifinfo
@node Clock Manager Introduction, Clock Manager Background, Clock Manager, Clock Manager
@end ifinfo
@section Introduction
The clock manager ...
The directives provided by the clock manager are:
@itemize @bullet
@item @code{clock_gettime} -
@item @code{clock_settime} -
@item @code{clock_getres} -
@item @code{nanosleep} -
@item @code{time} -
@end itemize
@ifinfo
@node Clock Manager Background, Clock Manager Operations, Clock Manager Introduction, Clock Manager
@end ifinfo
@section Background
@ifinfo
@node Clock Manager Operations, Clock Manager Directives, Clock Manager Background, Clock Manager
@end ifinfo
@section Operations
@ifinfo
@node Clock Manager Directives, clock_gettime, Clock Manager Operations, Clock Manager
@end ifinfo
@section Directives
@ifinfo
@menu
* clock_gettime::
* clock_settime::
* clock_getres::
* sleep::
* nanosleep::
* time::
@end menu
@end ifinfo
This section details the clock manager's directives.
A subsection is dedicated to each of this manager's directives
and describes the calling sequence, related constants, usage,
and status codes.
@page
@ifinfo
@node clock_gettime, clock_settime, Clock Manager Directives, Clock Manager Directives
@end ifinfo
@subsection clock_gettime
@subheading CALLING SEQUENCE:
@example
#include <time.h>
int clock_gettime(
clockid_t clock_id,
struct timespec *tp
);
@end example
@subheading STATUS CODES:
On error, this routine returns -1 and sets errno to one of the following:
@table @b
@item EINVAL
The tp pointer parameter is invalid.
@item EINVAL
The clock_id specified is invalid.
@end table
@subheading DESCRIPTION:
@subheading NOTES:
@page
@ifinfo
@node clock_settime, clock_getres, clock_gettime, Clock Manager Directives
@end ifinfo
@subsection clock_settime
@subheading CALLING SEQUENCE:
@example
#include <time.h>
int clock_settime(
clockid_t clock_id,
const struct timespec *tp
);
@end example
@subheading STATUS CODES:
On error, this routine returns -1 and sets errno to one of the following:
@table @b
@item EINVAL
The tp pointer parameter is invalid.
@item EINVAL
The clock_id specified is invalid.
@item EINVAL
The contents of the tp structure are invalid.
@end table
@subheading DESCRIPTION:
@subheading NOTES:
@page
@ifinfo
@node clock_getres, sleep, clock_settime, Clock Manager Directives
@end ifinfo
@subsection clock_getres
@subheading CALLING SEQUENCE:
@example
#include <time.h>
int clock_getres(
clockid_t clock_id,
struct timespec *res
);
@end example
@subheading STATUS CODES:
On error, this routine returns -1 and sets errno to one of the following:
@table @b
@item EINVAL
The res pointer parameter is invalid.
@item EINVAL
The clock_id specified is invalid.
@end table
@subheading DESCRIPTION:
@subheading NOTES:
If res is NULL, then the resolution is not returned.
@page
@ifinfo
@node sleep, nanosleep, clock_getres, Clock Manager Directives
@end ifinfo
@subsection sleep
@subheading CALLING SEQUENCE:
@example
#include <time.h>
unsigned int sleep(
unsigned int seconds
);
@end example
@subheading STATUS CODES:
This routine returns the number of unslept seconds.
@subheading DESCRIPTION:
@subheading NOTES:
This call is interruptible by a signal.
@page
@ifinfo
@node nanosleep, time, sleep, Clock Manager Directives
@end ifinfo
@subsection nanosleep
@subheading CALLING SEQUENCE:
@example
#include <time.h>
int nanosleep(
const struct timespec *rqtp,
struct timespec *rmtp
);
@end example
@subheading STATUS CODES:
On error, this routine returns -1 and sets errno to one of the following:
@table @b
@item EINTR
The routine was interrupted by a signal.
@item EAGAIN
The requested sleep period specified negative seconds or nanoseconds.
@item EINVAL
The requested sleep period specified an invalid number for the nanoseconds
field.
@end table
@subheading DESCRIPTION:
@subheading NOTES:
This call is interruptible by a signal.
@page
@ifinfo
@node time, Scheduler Manager, nanosleep, Clock Manager Directives
@end ifinfo
@subsection nanosleep
@subheading time SEQUENCE:
@example
#include <time.h>
int time(
time_t *tloc
);
@end example
@subheading STATUS CODES:
This routine returns the number of seconds since the Epoch.
@subheading DESCRIPTION:
@subheading NOTES:
