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¶
lockstatus(9),
buf(9),
BUF_LOCK(9),
BUF_UNLOCK(9),
lockmgr(9)
AUTHORS¶
This manual page was written by
Attilio Rao
⟨attilio@FreeBSD.org⟩.