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- /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
- /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
- /*
- * Copyright (c) 1991, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Scooter Morris at Genentech Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)lockf.h 8.1 (Berkeley) 6/11/93
- */
-
- #ifndef _SYS_LOCKF_H_
- #define _SYS_LOCKF_H_
-
- /*
- * The lockf structure is a kernel structure which contains the information
- * associated with a byte range lock. The lockf structures are linked into
- * the inode structure. Locks are sorted by the starting byte of the lock for
- * efficiency.
- */
- struct lockf {
- short lf_flags; /* Lock semantics: F_POSIX, F_FLOCK, F_WAIT */
- short lf_type; /* Lock type: F_RDLCK, F_WRLCK */
- off_t lf_start; /* The byte # of the start of the lock */
- off_t lf_end; /* The byte # of the end of the lock (-1=EOF)*/
- caddr_t lf_id; /* The id of the resource holding the lock */
- struct lockf **lf_head; /* Back pointer to the head of lockf list */
- struct lockf *lf_next; /* A pointer to the next lock on this inode */
- struct lockf *lf_block; /* The list of blocked locks */
- };
-
- /* Maximum length of sleep chains to traverse to try and detect deadlock. */
- #define MAXDEPTH 50
-
- __BEGIN_DECLS
- void lf_addblock __P((struct lockf *, struct lockf *));
- int lf_advlock __P((struct lockf **,
- off_t, caddr_t, int, struct flock *, int));
- int lf_clearlock __P((struct lockf *));
- int lf_findoverlap __P((struct lockf *,
- struct lockf *, int, struct lockf ***, struct lockf **));
- struct lockf *
- lf_getblock __P((struct lockf *));
- int lf_getlock __P((struct lockf *, struct flock *));
- int lf_setlock __P((struct lockf *));
- void lf_split __P((struct lockf *, struct lockf *));
- void lf_wakelock __P((struct lockf *));
- __END_DECLS
-
- #if LOCKF_DEBUG
- extern int lockf_debug;
-
- __BEGIN_DECLS
- void lf_print __P((char *, struct lockf *));
- void lf_printlist __P((char *, struct lockf *));
- __END_DECLS
- #endif /* LOCKF_DEBUG */
- #endif /* !_SYS_LOCKF_H_ */
-