2001-07-10 04:22:14 +00:00
|
|
|
.\"
|
|
|
|
|
.\" Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. 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(s), this list of conditions and the following disclaimer as
|
|
|
|
|
.\" the first lines of this file unmodified other than the possible
|
|
|
|
|
.\" addition of one or more copyright notices.
|
|
|
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
.\" notice(s), this list of conditions and the following disclaimer in the
|
|
|
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
|
|
|
.\"
|
|
|
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``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 COPYRIGHT HOLDER(S) 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.
|
|
|
|
|
.\"
|
|
|
|
|
.\" $FreeBSD$
|
|
|
|
|
.\"
|
|
|
|
|
.Dd July 9, 2001
|
|
|
|
|
.Dt BUF_LOCK 9
|
|
|
|
|
.Os
|
|
|
|
|
.Sh NAME
|
|
|
|
|
.Nm BUF_LOCK
|
2001-07-11 09:13:12 +00:00
|
|
|
.Nd "locks a buffer"
|
2001-07-10 04:22:14 +00:00
|
|
|
.Sh SYNOPSIS
|
2001-07-11 09:13:12 +00:00
|
|
|
.In sys/param.h
|
2001-12-26 23:14:04 +00:00
|
|
|
.In sys/systm.h
|
|
|
|
|
.In sys/uio.h
|
|
|
|
|
.In sys/bio.h
|
2001-07-11 09:13:12 +00:00
|
|
|
.In sys/buf.h
|
2001-07-10 04:22:14 +00:00
|
|
|
.Ft int
|
2001-07-11 03:51:44 +00:00
|
|
|
.Fn BUF_LOCK "struct buf *bp" "int locktype"
|
2001-07-10 04:22:14 +00:00
|
|
|
.Sh DESCRIPTION
|
|
|
|
|
The
|
2001-07-11 09:13:12 +00:00
|
|
|
.Fn BUF_LOCK
|
|
|
|
|
function locks the given buffer.
|
|
|
|
|
If the lock is already held this
|
2001-07-16 07:37:22 +00:00
|
|
|
call will block until it can acquire the lock unless
|
2001-07-11 09:13:12 +00:00
|
|
|
.Dv LK_NOWAIT
|
|
|
|
|
is set.
|
2001-07-10 04:22:14 +00:00
|
|
|
.Pp
|
|
|
|
|
Its arguments are:
|
2001-07-13 09:09:52 +00:00
|
|
|
.Bl -tag -width ".Fa locktype"
|
2001-07-11 09:13:12 +00:00
|
|
|
.It Fa bp
|
2001-07-10 04:22:14 +00:00
|
|
|
The buffer to lock.
|
2001-07-11 09:13:12 +00:00
|
|
|
.It Fa locktype
|
|
|
|
|
Flags controlling the type of lock.
|
|
|
|
|
See
|
|
|
|
|
.Xr lockmgr 9
|
|
|
|
|
for details.
|
2001-07-10 04:22:14 +00:00
|
|
|
.El
|
|
|
|
|
.Sh RETURN VALUES
|
2001-07-11 09:13:12 +00:00
|
|
|
A value of 0 is returned upon success.
|
|
|
|
|
See
|
|
|
|
|
.Xr lockmgr 9
|
|
|
|
|
for
|
2001-07-10 04:22:14 +00:00
|
|
|
information on non-zero return values.
|
|
|
|
|
.Sh SEE ALSO
|
2001-07-11 09:13:12 +00:00
|
|
|
.Xr buf 9 ,
|
|
|
|
|
.Xr BUF_TIMELOCK 9 ,
|
|
|
|
|
.Xr BUF_UNLOCK 9 ,
|
2001-07-10 04:22:14 +00:00
|
|
|
.Xr lockmgr 9
|
|
|
|
|
.Sh AUTHORS
|
2005-06-28 20:15:19 +00:00
|
|
|
This manual page was written by
|
2014-06-26 21:44:30 +00:00
|
|
|
.An Chad David Aq Mt davidc@acns.ab.ca .
|
