freebsd man page for buf_islocked

BUF_ISLOCKED(9) 					   BSD Kernel Developer's Manual					   BUF_ISLOCKED(9)

NAME
     BUF_ISLOCKED -- returns the state of the lock linked to the buffer

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

     int
     BUF_ISLOCKED(struct buf *bp);

DESCRIPTION
     The BUF_ISLOCKED() function returns the status of the lock linked to the buffer in relation to curthread.

     It can return:

     LK_EXCLUSIVE  An exclusive lock is held by curthread.

     LK_EXCLOTHER  An exclusive lock is held by someone other than curthread.

     LK_SHARED	   A shared lock is held.

     0		   The lock is not held by anyone.

SEE ALSO
     buf(9), BUF_LOCK(9), BUF_UNLOCK(9), lockmgr(9), lockstatus(9)

AUTHORS
     This manual page was written by Attilio Rao <attilio@FreeBSD.org>.

BSD
								 January 22, 2008							       BSD