freebsd-dev/share/man/man9/lockstatus.9
2001-07-13 09:09:52 +00:00

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.\" $FreeBSD$
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.Dd July 9, 2001
.Dt LOCKSTATUS 9
.Os
.Sh NAME
.Nm lockstatus
.Nd "returns the lock status"
.Sh SYNOPSIS
.In sys/types.h
.In sys/lockmgr.h
.Ft int
.Fn lockstatus "struct lock *lkp" "struct proc *p"
.Sh DESCRIPTION
The
.Fn lockstatus
function returns the status of the lock in relation to the
.Vt proc
passed to it.
.Pp
Its arguments are:
.Bl -tag -width ".Fa lkp"
.It Fa lkp
The lock to return the status of.
.It Fa p
The process to check any exclusive locks against.
If
.Fa p
is
.Dv NULL
and an exclusive lock is held,
.Dv LK_EXCLUSIVE
is returned.
.El
.Sh RETURN VALUES
.Bl -tag -width ".Dv LK_EXCLUSIVE"
.It Dv LK_EXCLUSIVE
An exclusive lock is held by the process
.Fa p
passed in.
.It Dv LK_EXCLOTHER
An exclusive lock is held by someone other then the process
.Fa p
passed in.
.It Dv LK_SHARED
A shared lock is held.
.It 0
The lock is not held by anyone.
.El
.Sh SEE ALSO
.Xr lockcount 9 ,
.Xr lockdestroy 9 ,
.Xr lockmgr 9 ,
.Xr lockmgr_printinfo 9
.Sh AUTHORS
This man page was written by
.An Chad David Aq davidc@acns.ab.ca .