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.\" $OpenBSD: bintimeadd.9,v 1.1 2019/06/03 01:27:30 cheloha Exp $
.\" $NetBSD: getitimer.2,v 1.6 1995/10/12 15:40:54 jtc Exp $
.\"
.\" Copyright (c) 1983, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)getitimer.2 8.2 (Berkeley) 12/11/93
.\"
.Dd $Mdocdate: June 3 2019 $
.Dt BINTIMEADD 9
.Os
.Sh NAME
.Nm bintimecmp ,
.Nm bintimesub ,
.Nm bintimeadd ,
.Nm bintimeaddfrac ,
.Nm BINTIME_TO_TIMEVAL ,
.Nm BINTIME_TO_TIMESPEC ,
.Nm TIMEVAL_TO_BINTIME ,
.Nm TIMESPEC_TO_BINTIME
.Nd manipulate kernel time structures
.Sh SYNOPSIS
.In sys/time.h
.Ft int
.Fo bintimecmp
.Fa "struct bintime *a"
.Fa "struct bintime *b"
.Fa operator
.Fc
.Ft void
.Fo bintimesub
.Fa "const struct bintime *a"
.Fa "const struct bintime *b"
.Fa "struct bintime *c"
.Fc
.Ft void
.Fo bintimeadd
.Fa "const struct bintime *a"
.Fa "const struct bintime *b"
.Fa "struct bintime *c"
.Fc
.Ft void
.Fo bintimeaddfrac
.Fa "const struct bintime *a"
.Fa "uint64_t fraction"
.Fa "struct bintime *b"
.Fc
.Ft void
.Fo BINTIME_TO_TIMEVAL
.Fa "const struct bintime *bt"
.Fa "struct timeval *tv"
.Fc
.Ft void
.Fo BINTIME_TO_TIMESPEC
.Fa "const struct bintime *bt"
.Fa "struct timespec *ts"
.Fc
.Ft void
.Fo TIMEVAL_TO_BINTIME
.Fa "const struct timeval *tv"
.Fa "struct bintime *bt"
.Fc
.Ft void
.Fo TIMESPEC_TO_BINTIME
.Fa "const struct timespec *ts"
.Fa "struct bintime *bt"
.Fc
.Sh DESCRIPTION
These functions simplify the use of
.Vt bintime
structures and the conversion to and from other time representations.
.Pp
The following functions are available:
.Bl -tag -width Ds
.It Fn bintimecmp a b operator
Test if the expression
.Fa a operator b
is true,
where
.Fa operator
is one of
.Cm < ,
.Cm <= ,
.Cm == ,
.Cm != ,
.Cm >= ,
or
.Cm > .
.It Fn bintimesub a b c
Subtract
.Fa b
from
.Fa a
and store the result in
.Fa c .
.It Fn bintimeadd a b c
Add
.Fa b
to
.Fa a
and store the result in
.Fa c .
.It Fn bintimeaddfrac a fraction b
Add
.Fa fraction
fractional seconds to
.Fa a
and store the result in
.Fa b .
A fractional second is equal to 1 / (2^64) seconds.
.It Fn BINTIME_TO_TIMEVAL bt tv
Convert
.Fa bt
to a
.Vt struct timeval
and store the result in
.Fa tv .
.It Fn BINTIME_TO_TIMESPEC bt ts
Convert
.Fa bt
to a
.Vt struct timespec
and store the result in
.Fa ts .
.It Fn TIMEVAL_TO_BINTIME tv bt
Convert
.Fa tv
to a
.Vt struct bintime
and store the result in
.Fa bt .
.It Fn TIMESPEC_TO_BINTIME ts bt
Convert
.Fa ts
to a
.Vt struct bintime
and store the result in
.Fa bt .
.El
.Sh RETURN VALUES
.Fn bintimecmp
returns 1 if the tested condition holds or 0 otherwise.
.Sh CODE REFERENCES
These functions are implemented in the file
.Pa sys/sys/time.h .
.Sh SEE ALSO
.Xr timeradd 3 ,
.Xr microtime 9 ,
.Xr tc_init 9 ,
.Xr timeout 9
.Sh HISTORY
Predecessors to these functions first appeared in
.Fx 5.0
and were ported to
.Ox 3.6 .
They were modified to more closely resemble the
.Xr timeradd 3
macros for
.Ox 6.6 .
.Sh AUTHORS
.An Poul-Henning Kamp Aq Mt phk@freebsd.org
|
