1.\" 2.\" Copyright (C) 2008 Attilio Rao <attilio@FreeBSD.org> 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice(s), this list of conditions and the following disclaimer as 10.\" the first lines of this file unmodified other than the possible 11.\" addition of one or more copyright notices. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice(s), this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY 17.\" EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 19.\" DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY 20.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 23.\" CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 26.\" DAMAGE. 27.\" 28.\" $FreeBSD$ 29.\" 30.Dd January 22, 2008 31.Dt BUF_ISLOCKED 9 32.Os 33.Sh NAME 34.Nm BUF_ISLOCKED 35.Nd "returns the state of the lock linked to the buffer" 36.Sh SYNOPSIS 37.In sys/param.h 38.In sys/systm.h 39.In sys/uio.h 40.In sys/bio.h 41.In sys/buf.h 42.Ft int 43.Fn BUF_ISLOCKED "struct buf *bp" 44.Sh DESCRIPTION 45The 46.Fn BUF_ISLOCKED 47function returns the status of the lock linked to the buffer in relation to 48curthread. 49.Pp 50It can return: 51.Bl -tag -width ".Dv LK_EXCLUSIVE" 52.It Dv LK_EXCLUSIVE 53An exclusive lock is held by curthread. 54.It Dv LK_EXCLOTHER 55An exclusive lock is held by someone other than curthread. 56.It Dv LK_SHARED 57A shared lock is held. 58.It Li 0 59The lock is not held by anyone. 60.El 61.Sh SEE ALSO 62.Xr buf 9 , 63.Xr BUF_LOCK 9 , 64.Xr BUF_UNLOCK 9 , 65.Xr lockmgr 9 , 66.Xr lockstatus 9 67.Sh AUTHORS 68This manual page was written by 69.An Attilio Rao Aq Mt attilio@FreeBSD.org . 70