bsd/miscfs/fifofs/fifo.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  29 /*
  30  * Copyright (c) 1991, 1993
  31  *      The Regents of the University of California.  All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. All advertising materials mentioning features or use of this software
  42  *    must display the following acknowledgement:
  43  *      This product includes software developed by the University of
  44  *      California, Berkeley and its contributors.
  45  * 4. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)fifo.h      8.3 (Berkeley) 8/10/94
  62  */
  63 #ifndef __FIFOFS_FOFO_H__
  64 #define __FIFOFS_FOFO_H__
  65
  66 __BEGIN_DECLS
  67
  68 #ifdef BSD_KERNEL_PRIVATE
  69
  70
  71 /*
  72  * This structure is associated with the FIFO vnode and stores
  73  * the state associated with the FIFO.
  74  */
  75 struct fifoinfo {
  76         unsigned int    fi_flags;
  77         struct socket   *fi_readsock;
  78         struct socket   *fi_writesock;
  79         long        fi_readers;
  80         long        fi_writers;
  81         unsigned int    fi_count;
  82 };
  83
  84 #define FIFO_INCREATE   1
  85 #define FIFO_CREATEWAIT 2
  86 #define FIFO_CREATED    4
  87
  88 int     fifo_close_internal(vnode_t, int, vfs_context_t, int);
  89 int fifo_freespace(struct vnode *vp, long *count);
  90 int fifo_charcount(struct vnode *vp, int *count);
  91
  92 #endif /* BSD_KERNEL_PRIVATE */
  93 #ifdef KERNEL
  94 /*
  95  * Prototypes for fifo operations on vnodes.
  96  */
  97 int     fifo_ebadf(void *);
  98
  99 #define fifo_create (int (*) (struct  vnop_create_args *))err_create
 100 #define fifo_mknod (int (*) (struct  vnop_mknod_args *))err_mknod
 101 #define fifo_access (int (*) (struct  vnop_access_args *))fifo_ebadf
 102 #define fifo_getattr (int (*) (struct  vnop_getattr_args *))fifo_ebadf
 103 #define fifo_setattr (int (*) (struct  vnop_setattr_args *))fifo_ebadf
 104 #define fifo_revoke nop_revoke
 105 #define fifo_mmap (int (*) (struct  vnop_mmap_args *))err_mmap
 106 #define fifo_fsync (int (*) (struct  vnop_fsync_args *))nullop
 107 #define fifo_remove (int (*) (struct  vnop_remove_args *))err_remove
 108 #define fifo_link (int (*) (struct  vnop_link_args *))err_link
 109 #define fifo_rename (int (*) (struct  vnop_rename_args *))err_rename
 110 #define fifo_mkdir (int (*) (struct  vnop_mkdir_args *))err_mkdir
 111 #define fifo_rmdir (int (*) (struct  vnop_rmdir_args *))err_rmdir
 112 #define fifo_symlink (int (*) (struct  vnop_symlink_args *))err_symlink
 113 #define fifo_readdir (int (*) (struct  vnop_readdir_args *))err_readdir
 114 #define fifo_readlink (int (*) (struct  vnop_readlink_args *))err_readlink
 115 #define fifo_reclaim (int (*) (struct  vnop_reclaim_args *))nullop
 116 #define fifo_strategy (int (*) (struct  vnop_strategy_args *))err_strategy
 117 #define fifo_valloc (int (*) (struct  vnop_valloc_args *))err_valloc
 118 #define fifo_vfree (int (*) (struct  vnop_vfree_args *))err_vfree
 119 #define fifo_bwrite (int (*) (struct  vnop_bwrite_args *))nullop
 120 #define fifo_blktooff (int (*) (struct vnop_blktooff_args *))err_blktooff
 121
 122 int     fifo_lookup(struct vnop_lookup_args *);
 123 int     fifo_open(struct vnop_open_args *);
 124 int     fifo_close(struct vnop_close_args *);
 125 int     fifo_read(struct vnop_read_args *);
 126 int     fifo_write(struct vnop_write_args *);
 127 int     fifo_ioctl(struct vnop_ioctl_args *);
 128 int     fifo_select(struct vnop_select_args *);
 129 int     fifo_inactive(struct  vnop_inactive_args *);
 130 int     fifo_pathconf(struct vnop_pathconf_args *);
 131 int     fifo_advlock(struct vnop_advlock_args *);
 132
 133 #endif /* KERNEL */
 134
 135 __END_DECLS
 136
 137 #endif /* __FIFOFS_FOFO_H__ */