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/buf.h 38.Ft int 39.Fn BUF_LOCK "struct buf *bp" "int locktype" 40.Sh DESCRIPTION 41The 42.Fn BUF_LOCK 43function locks the given buffer. 44If the lock is already held this 45call will block until it can acquire the lock unless 46.Dv LK_NOWAIT 47is set. 48.Pp 49Its arguments are: 50.Bl -tag -width ".Fa locktype" 51.It Fa bp 52The buffer to lock. 53.It Fa locktype 54Flags controlling the type of lock. 55See 56.Xr lockmgr 9 57for details. 58.El 59.Sh RETURN VALUES 60A value of 0 is returned upon success. 61See 62.Xr lockmgr 9 63for 64information on non-zero return values. 65.Sh SEE ALSO 66.Xr buf 9 , 67.Xr BUF_TIMELOCK 9 , 68.Xr BUF_UNLOCK 9 , 69.Xr lockmgr 9 70.Sh AUTHORS 71This man page was written by 72.An Chad David Aq davidc@acns.ab.ca . 73