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21f4052c5b
groff(1) has changed the internal layout for the .Lb doc strings, but to preserve backwards compatibility we cannot simply rename them, we need to create new aliases so that these will work with old and new macros. Signed-off-by: Guillem Jover <guillem@hadrons.org>
161 lines
4.2 KiB
Plaintext
161 lines
4.2 KiB
Plaintext
.\" $NetBSD: timeradd.3,v 1.8 2010/06/07 18:40:16 jruoho Exp $
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.\"
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.\" Copyright (c) 2009 Jukka Ruohonen <jruohonen@iki.fi>
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.\" Copyright (c) 1999 Kelly Yancey <kbyanc@posi.net>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the author nor the names of any co-contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD: src/share/man/man3/timeradd.3,v 1.3 2003/09/08 19:57:19 ru Exp $
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.\"
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.Dd June 7, 2010
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.Dt TIMERADD 3bsd
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.Os
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.Sh NAME
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.Nm timeradd ,
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.Nm timersub ,
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.Nm timerclear ,
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.Nm timerisset ,
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.Nm timercmp ,
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.Nm timespecadd ,
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.Nm timespecsub ,
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.Nm timespecclear ,
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.Nm timespecisset ,
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.Nm timespeccmp
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.Nd operations on time structure
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.Sh LIBRARY
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.ds str-Lb-libbsd Utility functions from BSD systems (libbsd, \-lbsd)
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.ds doc-str-Lb-libbsd \*[str-Lb-libbsd]
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.Lb libbsd
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.Sh SYNOPSIS
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.In sys/time.h
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(See
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.Xr libbsd 7
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for include usage.)
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.Ft void
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.Fn timeradd "struct timeval *a" "struct timeval *b" "struct timeval *res"
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.Ft void
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.Fn timersub "struct timeval *a" "struct timeval *b" "struct timeval *res"
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.Ft void
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.Fn timerclear "struct timeval *tv"
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.Ft int
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.Fn timerisset "struct timeval *tv"
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.Ft int
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.Fn timercmp "struct timeval *a" "struct timeval *b" CMP
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.Ft void
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.Fn timespecadd "struct timespec *a" \
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"struct timespec *b" "struct timespec *res"
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.Ft void
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.Fn timespecsub "struct timespec *a" \
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"struct timespec *b" "struct timespec *res"
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.Ft void
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.Fn timespecclear "struct timespec *ts"
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.Ft int
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.Fn timespecisset "struct timespec *ts"
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.Ft int
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.Fn timespeccmp "struct timespec *a" "struct timespec b" CMP
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.Sh DESCRIPTION
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These macros are provided for manipulating the
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.Fa timeval
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and
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.Fa timespec
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structures described in
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.Xr timeval 3bsd .
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.Pp
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The
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.Fn timeradd
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and
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.Fn timespecadd
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macros add the time information stored in
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.Fa a
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to
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.Fa b ,
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storing the result in
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.Fa res .
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With
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.Fn timeradd
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the results are simplified such that the value of
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.Fa res->tv_usec
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is always less than 1,000,000 (1 second).
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With
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.Fn timespecadd
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the
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.Fa res->tv_nsec
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member of
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.Fa struct timespec
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is always less than 1,000,000,000.
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.Pp
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The
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.Fn timersub
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and
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.Fn timespecsub
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macros subtract the time information stored in
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.Fa b
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from
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.Fa a
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and store the resulting structure
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in
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.Fa res .
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.Pp
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The
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.Fn timerclear
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and
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.Fn timespecclear
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macros initialize the structures
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to midnight (0 hour) January 1st, 1970 (the Epoch).
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In other words, they set the members of the structure to zero.
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.Pp
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The
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.Fn timerisset
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and
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.Fn timespecisset
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macros return true if the input structure
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is set to any time value other than the Epoch.
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.Pp
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The
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.Fn timercmp
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and
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.Fn timespeccmp
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macros compare
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.Fa a
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to
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.Fa b
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using the comparison operator given in
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.Fa CMP .
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The result of the comparison is returned.
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.Sh SEE ALSO
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.Xr timeval 3bsd
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.Sh HISTORY
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The
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.Fn timeradd
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family of macros first appeared in
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.Nx 1.1 .
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These were later ported to
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.Fx 2.2.6 .
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The
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.Fn timespec
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family of macros first appeared in
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.Nx 1.2 .
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