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/*
*
* Copyright (c) 2003 The Regents of the University of California. All
* rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - 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.
*
*/
/* $Id: misc_lock.h,v 1.4 2004/08/17 22:21:20 ndbusek Exp $ */
/**
* \file misc_lock.h
* \brief file locking related utilities, header file
*
*/
#ifndef __MISC_LOCK_H__
#define __MISC_LOCK_H__
#include <sys/types.h>
/* (Un)Locking macros */
#define misc_read_lock(fd, offset, whence, len) \
misc_lock_reg(fd, F_SETLK, F_RDLCK, offset, whence, len)
#define misc_readw_lock(fd, offset, whence, len) \
misc_lock_reg(fd, F_SETLKW, F_RDLCK, offset, whence, len)
#define misc_write_lock(fd, offset, whence, len) \
misc_lock_reg(fd, F_SETLK, F_WRLCK, offset, whence, len)
#define misc_writew_lock(fd, offset, whence, len) \
misc_lock_reg(fd, F_SETLKW, F_WRLCK, offset, whence, len)
#define misc_un_lock(fd, offset, whence, len) \
misc_lock_reg(fd, F_SETLK, F_UNLCK, offset, whence, len)
/* Test Locking macros */
#define misc_is_readlock(fd, offset, whence, len) \
misc_lock_test(fd, F_RDLCK, offset, whence, len)
#define misc_is_writelock(fd, offset, whence, len) \
misc_lock_test(fd, F_WRLCK, offset, whence, len)
int misc_lock_reg(int fd, int cmd, int type, off_t offset, int whence,
off_t len);
pid_t misc_lock_test(int fd, int type, off_t offset, int whence, off_t
len);
#endif /* #ifndef __MISC_LOCK_H__ */
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