NAME    [Toc]    [Back]

     BUF_LOCK -- locks a buffer

SYNOPSIS    [Toc]    [Back]

     #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);

DESCRIPTION    [Toc]    [Back]

     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    [Toc]    [Back]

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

SEE ALSO    [Toc]    [Back]

     buf(9), BUF_TIMELOCK(9), BUF_UNLOCK(9), lockmgr(9)

AUTHORS    [Toc]    [Back]

     This man page was written by Chad David <davidc@acns.ab.ca>.


FreeBSD 5.2.1			 July 9, 2001			 FreeBSD 5.2.1