Something went wrong. Try again.
Cider Isn't Darwin Emulation, Really
Something went wrong. Try again.
4.9 kB · 121 lines
C
at android
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122/* * Copyright (c) 2004-2006 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ *//* * 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. * 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 * $FreeBSD: src/sys/sys/lockf.h,v 1.16 2004/04/07 04:19:49 imp Exp $ */
#ifndef _SYS_LOCKF_H_#define _SYS_LOCKF_H_
#include <sys/queue.h>#include <sys/cdefs.h>
struct vnop_advlock_args;struct vnode;
#ifdef MALLOC_DECLAREMALLOC_DECLARE(M_LOCKF);#endif
/* * The lockf structure is a kernel structure which contains the information * associated with a byte range lock. The lockf structures are linked into * the vnode structure. Locks are sorted by the starting byte of the lock for * efficiency after they have been committed; uncommitted locks are on the list * head so they may quickly be accessed, and are both short lived and transient. */TAILQ_HEAD(locklist, lockf);
#pragma pack(4)
struct lockf { short lf_flags; /* Semantics: F_POSIX, F_FLOCK, F_WAIT */ short lf_type; /* Lock type: F_RDLCK, F_WRLCK */ off_t lf_start; /* Byte # of the start of the lock */ off_t lf_end; /* Byte # of the end of the lock (-1=EOF) */ caddr_t lf_id; /* Id of the resource holding the lock */ struct lockf **lf_head; /* Back pointer to the head of the locf list */ struct vnode *lf_vnode; /* Back pointer to the inode */ struct lockf *lf_next; /* Pointer to the next lock on this inode */ struct locklist lf_blkhd; /* List of requests blocked on this lock */ TAILQ_ENTRY(lockf) lf_block;/* A request waiting for a lock */};
#pragma pack()
/* Maximum length of sleep chains to traverse to try and detect deadlock. */#define MAXDEPTH 50
__BEGIN_DECLS
#ifdef KERNEL_PRIVATEint lf_advlock(struct vnop_advlock_args *);int lf_assert(struct vnop_advlock_args *, void **);void lf_commit(void *, int);void lf_abort_advlocks(vnode_t);
#ifdef LOCKF_DEBUGvoid lf_print(char *, struct lockf *);void lf_printlist(char *, struct lockf *);#endif#endif /* KERNEL_PRIVATE */
__END_DECLS
#endif /* !_SYS_LOCKF_H_ */