freebsd-dev/share/man/man9/lockstatus.9
Sheldon Hearn 211ab8715e Updates for changes made by KSE import.
Submitted by:	Chad David <davidc@acns.ab.ca>
2001-10-06 11:19:41 +00:00

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.\" $FreeBSD$
.\"
.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 thread *td"
.Sh DESCRIPTION
The
.Fn lockstatus
function returns the status of the lock in relation to the
.Vt thread
passed to it.
.Pp
Its arguments are:
.Bl -tag -width ".Fa lkp"
.It Fa lkp
The lock to return the status of.
.It Fa td
The thread to check any exclusive locks against.
If
.Fa td
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 thread
.Fa td
passed in.
.It Dv LK_EXCLOTHER
An exclusive lock is held by someone other then the thread
.Fa td
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 .