1.\" 2.\" Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice(s), this list of conditions and the following disclaimer as 9.\" the first lines of this file unmodified other than the possible 10.\" addition of one or more copyright notices. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice(s), this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY 16.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18.\" DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY 19.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 22.\" CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 25.\" DAMAGE. 26.\" 27.\" $FreeBSD$ 28.\" 29.Dd July 9, 2001 30.Dt BUF_LOCK 9 31.Os 32.Sh NAME 33.Nm BUF_LOCK 34.Nd "locks a buffer" 35.Sh SYNOPSIS 36.In sys/param.h 37.In sys/systm.h 38.In sys/uio.h 39.In sys/bio.h 40.In sys/buf.h 41.Ft int 42.Fn BUF_LOCK "struct buf *bp" "int locktype" 43.Sh DESCRIPTION 44The 45.Fn BUF_LOCK 46function locks the given buffer. 47If the lock is already held this 48call will block until it can acquire the lock unless 49.Dv LK_NOWAIT 50is set. 51.Pp 52Its arguments are: 53.Bl -tag -width ".Fa locktype" 54.It Fa bp 55The buffer to lock. 56.It Fa locktype 57Flags controlling the type of lock. 58See 59.Xr lockmgr 9 60for details. 61.El 62.Sh RETURN VALUES 63A value of 0 is returned upon success. 64See 65.Xr lockmgr 9 66for 67information on non-zero return values. 68.Sh SEE ALSO 69.Xr buf 9 , 70.Xr BUF_TIMELOCK 9 , 71.Xr BUF_UNLOCK 9 , 72.Xr lockmgr 9 73.Sh AUTHORS 74This manual page was written by 75.An Chad David Aq Mt davidc@acns.ab.ca . 76