BUF_ISLOCKED.9 revision 267654
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: releng/9.3/share/man/man9/BUF_ISLOCKED.9 236235 2012-05-29 14:35:51Z gjb $
.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 n sys/param.h n sys/systm.h n sys/uio.h n sys/bio.h n 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.
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: releng/9.3/share/man/man9/BUF_ISLOCKED.9 236235 2012-05-29 14:35:51Z gjb $
.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 n sys/param.h n sys/systm.h n sys/uio.h n sys/bio.h n 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.
p It can return: l -tag -width ".Dv LK_EXCLUSIVE" t Dv LK_EXCLUSIVE An exclusive lock is held by curthread. t Dv LK_EXCLOTHER An exclusive lock is held by someone other than curthread. t Dv LK_SHARED A shared lock is held. t Li 0 The lock is not held by anyone. .El .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 .