BUF_TIMELOCK(9) MidnightBSD Kernel Developer’s Manual BUF_TIMELOCK(9)

NAME

BUF_TIMELOCK — locks a buffer

SYNOPSIS

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/uio.h>
#include <sys/bio.h>
#include <sys/buf.h>

int

BUF_TIMELOCK(struct buf *bp, int locktype, char *wmesg, int catch, int timo);

DESCRIPTION

The BUF_TIMELOCK() function locks the given buffer, and limits the amount of time it will sleep to timo and OR’s catch into the sleep’s priority. wmesg is the wmesg used in the sleep.

Its arguments are:

bp

The buffer to lock.

locktype

Flags controlling the type of lock. See lockmgr(9) for details.

wmesg

The wmesg used in any sleeps while acquiring the lock.

catch

Priority OR’d into the sleep’s priority.

timo

The timeout for any sleeps encountered during the lock.

RETURN VALUES

A value of 0 is returned on success. See lockmgr(9) for details on non-zero return values.

SEE ALSO

buf(9), BUF_LOCK(9), BUF_UNLOCK(9), lockmgr(9)

AUTHORS

This manual page was written by Chad David 〈davidc@acns.ab.ca〉.

MidnightBSD 0.3 July 9, 2001 MidnightBSD 0.3