freebsd-skq/share/man/man9/BUF_TIMELOCK.9

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.\"
.\" Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. All rights reserved.
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.\" $FreeBSD$
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.Dd July 9, 2001
.Dt BUF_TIMELOCK 9
.Os
.Sh NAME
.Nm BUF_TIMELOCK
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.Nd "locks a buffer"
.Sh SYNOPSIS
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.In sys/param.h
.In sys/systm.h
.In sys/uio.h
.In sys/bio.h
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.In sys/buf.h
.Ft int
.Fn BUF_TIMELOCK "struct buf *bp" "int locktype" "char *wmesg" "int catch" "int timo"
.Sh DESCRIPTION
The
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.Fn BUF_TIMELOCK
function locks the given buffer, and limits the amount of time it
will sleep to
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.Fa timo
and OR's
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.Fa catch
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into the sleep's priority.
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.Fa wmesg
is the wmesg used in the sleep.
.Pp
Its arguments are:
.Bl -tag -width ".Fa locktype"
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.It Fa bp
The buffer to lock.
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.It Fa locktype
Flags controlling the type of lock.
See
.Xr lockmgr 9
for details.
.It Fa wmesg
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The wmesg used in any sleeps while acquiring the lock.
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.It Fa catch
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Priority OR'd into the sleep's priority.
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.It Fa timo
The timeout for any sleeps encountered during the lock.
.El
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.Sh RETURN VALUES
A value of 0 is returned on success.
See
.Xr lockmgr 9
for details on non-zero return values.
.Sh SEE ALSO
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.Xr buf 9 ,
.Xr BUF_LOCK 9 ,
.Xr BUF_UNLOCK 9 ,
.Xr lockmgr 9
.Sh AUTHORS
This manual page was written by
.An Chad David Aq Mt davidc@acns.ab.ca .