sys/sys/clist.h

   1 /*-
   2  * Copyright (c) 1990, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)clist.h     8.1 (Berkeley) 6/4/93
  30  * $FreeBSD: src/sys/sys/clist.h,v 1.10 1999/12/29 04:24:38 peter Exp $
  31  * $DragonFly: src/sys/sys/clist.h,v 1.5 2006/05/20 02:42:13 dillon Exp $
  32  */
  33
  34 #ifndef _SYS_CLIST_H_
  35 #define _SYS_CLIST_H_
  36
  37 #ifndef _SYS_TYPES_H_
  38 #include <sys/types.h>
  39 #endif
  40
  41 #define CBLOCK  128             /* Clist block size, must be a power of 2. */
  42 #define CBQSIZE (CBLOCK/NBBY)   /* Quote bytes/cblock - can do better. */
  43                                 /* Data chars/clist. */
  44 #define CBSIZE  (CBLOCK - sizeof(struct cblockhead) - CBQSIZE)
  45 #define CROUND  (CBLOCK - 1)    /* Clist rounding. */
  46
  47 struct cblockhead {
  48         struct cblock *ch_next;
  49         int     ch_magic;
  50 };
  51
  52 #define CLIST_MAGIC_FREE        0x434c0102
  53 #define CLIST_MAGIC_USED        0x434c8182
  54
  55 struct cblock {
  56         struct cblockhead c_head;               /* header */
  57         unsigned char c_quote[CBQSIZE];         /* quoted characters */
  58         unsigned char c_info[CBSIZE];           /* characters */
  59 };
  60
  61 #ifdef _KERNEL
  62 extern  struct cblock *cfree;
  63 extern  int cfreecount;
  64 #endif
  65
  66 #endif