BUF_LOCK9
Locks a buffer
Usage
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/uio.h>
#include <sys/bio.h>
#include <sys/buf.h>
int
BUF_LOCK(struct buf *bp, int locktype);
Overview
The BUF_LOCK() function locks the given buffer. If the lock is already held this call will block until it can acquire the lock unless LK_NOWAIT is set.
Its arguments are:
- bp
-
The buffer to lock.
- locktype
-
Flags controlling the type of lock. See lockmgr(9) for details.
Return values
A value of 0 is returned upon success. See lockmgr(9) for information on non-zero return values.
Releases
56 releases since FreeBSD 5.0-RELEASE; the text changed 33 times.