The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/clist.h

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    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. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)clist.h     8.1 (Berkeley) 6/4/93
   34  * $FreeBSD: src/sys/sys/clist.h,v 1.10 1999/12/29 04:24:38 peter Exp $
   35  * $DragonFly: src/sys/sys/clist.h,v 1.5 2006/05/20 02:42:13 dillon Exp $
   36  */
   37 
   38 #ifndef _SYS_CLIST_H_
   39 #define _SYS_CLIST_H_
   40 
   41 #ifndef _SYS_TYPES_H_
   42 #include <sys/types.h>
   43 #endif
   44 
   45 #define CBLOCK  128             /* Clist block size, must be a power of 2. */
   46 #define CBQSIZE (CBLOCK/NBBY)   /* Quote bytes/cblock - can do better. */
   47                                 /* Data chars/clist. */
   48 #define CBSIZE  (CBLOCK - sizeof(struct cblockhead) - CBQSIZE)
   49 #define CROUND  (CBLOCK - 1)    /* Clist rounding. */
   50 
   51 struct cblockhead {
   52         struct cblock *ch_next;
   53         int     ch_magic;
   54 };
   55 
   56 #define CLIST_MAGIC_FREE        0x434c0102
   57 #define CLIST_MAGIC_USED        0x434c8182
   58 
   59 struct cblock {
   60         struct cblockhead c_head;               /* header */
   61         unsigned char c_quote[CBQSIZE];         /* quoted characters */
   62         unsigned char c_info[CBSIZE];           /* characters */
   63 };
   64 
   65 #ifdef _KERNEL
   66 extern  struct cblock *cfree;
   67 extern  int cfreecount;
   68 #endif
   69 
   70 #endif

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