xnu-1228.tar.gz

[apple/xnu.git] / bsd / miscfs / fifofs / fifo.h

/*
 * Copyright (c) 2000-2002 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
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 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
 * Copyright (c) 1991, 1993
 *	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:
 * 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.
 *
 *	@(#)fifo.h	8.3 (Berkeley) 8/10/94
 */
#ifndef __FIFOFS_FOFO_H__
#define __FIFOFS_FOFO_H__

#ifdef BSD_KERNEL_PRIVATE


/*
 * This structure is associated with the FIFO vnode and stores
 * the state associated with the FIFO.
 */
struct fifoinfo {
	unsigned int	fi_flags;
    struct socket   *fi_readsock;
    struct socket   *fi_writesock;
    long        fi_readers;
    long        fi_writers;
	unsigned int	fi_count;
};

#define FIFO_INCREATE	1
#define FIFO_CREATEWAIT	2
#define FIFO_CREATED	4


/*
 * Prototypes for fifo operations on vnodes.
 */
int	fifo_ebadf(void *);

int	fifo_lookup (struct vnop_lookup_args *);
#define fifo_create (int (*) (struct  vnop_create_args *))err_create
#define fifo_mknod (int (*) (struct  vnop_mknod_args *))err_mknod
int	fifo_open (struct vnop_open_args *);
int	fifo_close (struct vnop_close_args *);
int	fifo_close_internal (vnode_t, int, vfs_context_t, int);
#define fifo_access (int (*) (struct  vnop_access_args *))fifo_ebadf
#define fifo_getattr (int (*) (struct  vnop_getattr_args *))fifo_ebadf
#define fifo_setattr (int (*) (struct  vnop_setattr_args *))fifo_ebadf
int	fifo_read (struct vnop_read_args *);
int	fifo_write (struct vnop_write_args *);
int	fifo_ioctl (struct vnop_ioctl_args *);
int	fifo_select (struct vnop_select_args *);
#define	fifo_revoke nop_revoke
#define fifo_mmap (int (*) (struct  vnop_mmap_args *))err_mmap
#define fifo_fsync (int (*) (struct  vnop_fsync_args *))nullop
#define fifo_remove (int (*) (struct  vnop_remove_args *))err_remove
#define fifo_link (int (*) (struct  vnop_link_args *))err_link
#define fifo_rename (int (*) (struct  vnop_rename_args *))err_rename
#define fifo_mkdir (int (*) (struct  vnop_mkdir_args *))err_mkdir
#define fifo_rmdir (int (*) (struct  vnop_rmdir_args *))err_rmdir
#define fifo_symlink (int (*) (struct  vnop_symlink_args *))err_symlink
#define fifo_readdir (int (*) (struct  vnop_readdir_args *))err_readdir
#define fifo_readlink (int (*) (struct  vnop_readlink_args *))err_readlink
int	fifo_inactive (struct  vnop_inactive_args *);
#define fifo_reclaim (int (*) (struct  vnop_reclaim_args *))nullop
#define fifo_strategy (int (*) (struct  vnop_strategy_args *))err_strategy
int	fifo_pathconf (struct vnop_pathconf_args *);
int	fifo_advlock (struct vnop_advlock_args *);
#define fifo_valloc (int (*) (struct  vnop_valloc_args *))err_valloc
#define fifo_vfree (int (*) (struct  vnop_vfree_args *))err_vfree
#define fifo_bwrite (int (*) (struct  vnop_bwrite_args *))nullop
#define fifo_blktooff (int (*) (struct vnop_blktooff_args *))err_blktooff

#endif /* BSD_KERNEL_PRIVATE */

#endif /* __FIFOFS_FOFO_H__ */