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Diffstat (limited to 'share/man/man9/BUF_ISLOCKED.9')
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diff --git a/share/man/man9/BUF_ISLOCKED.9 b/share/man/man9/BUF_ISLOCKED.9 new file mode 100644 index 000000000000..7344869f6db9 --- /dev/null +++ b/share/man/man9/BUF_ISLOCKED.9 @@ -0,0 +1,68 @@ +.\" +.\" Copyright (C) 2008 Attilio Rao <attilio@FreeBSD.org> +.\" 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 January 22, 2008 +.Dt BUF_ISLOCKED 9 +.Os +.Sh NAME +.Nm BUF_ISLOCKED +.Nd "returns the state of the lock linked to the buffer" +.Sh SYNOPSIS +.In sys/param.h +.In sys/systm.h +.In sys/uio.h +.In sys/bio.h +.In sys/buf.h +.Ft int +.Fn BUF_ISLOCKED "struct buf *bp" +.Sh DESCRIPTION +The +.Fn BUF_ISLOCKED +function returns the status of the lock linked to the buffer in relation to +curthread. +.Pp +It can return: +.Bl -tag -width ".Dv LK_EXCLUSIVE" +.It Dv LK_EXCLUSIVE +An exclusive lock is held by curthread. +.It Dv LK_EXCLOTHER +An exclusive lock is held by someone other than curthread +.It Dv LK_SHARED +A shared lock is held. +.It Li 0 +The lock is not held by anyone. +.Sh SEE ALSO +.Xr lockstatus 9 , +.Xr buf 9 , +.Xr BUF_LOCK 9 , +.Xr BUF_UNLOCK 9 , +.Xr lockmgr 9 +.Sh AUTHORS +This manual page was written by +.An Attilio Rao Aq attilio@FreeBSD.org . |