FreeBSD/Linux Kernel Cross Reference
sys/dev/hptnr/list.h

     /* $Id: list.h,v 1.6 2006/10/31 06:25:28 gmm Exp $ */
     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (C) 2005-2011 HighPoint Technologies, Inc.
      * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
     *
     * $FreeBSD$
     */
    #include <dev/hptnr/hptnr_config.h>
    #ifndef _HPT_LIST_H_
    #define _HPT_LIST_H_
    
    #ifndef _LINUX_LIST_H
    
    #ifndef HPT_INLINE
    #define HPT_INLINE __inline
    #endif
    
    struct list_head {
            struct list_head *next, *prev;
    };
    
    #define INIT_LIST_HEAD(ptr) do { (ptr)->next = (ptr); (ptr)->prev = (ptr); } while (0)
    
    static HPT_INLINE void __list_add(struct list_head * _new, struct list_head * prev, struct list_head * next)
    {
            next->prev = _new;
            _new->next = next;
            _new->prev = prev;
            prev->next = _new;
    }
    
    static HPT_INLINE void list_add(struct list_head *_new, struct list_head *head)
    {
            __list_add(_new, head, head->next);
    }
    
    static HPT_INLINE void list_add_tail(struct list_head *_new, struct list_head *head)
    {
            __list_add(_new, head->prev, head);
    }
    
    static HPT_INLINE void __list_del(struct list_head * prev, struct list_head * next)
    {
            next->prev = prev;
            prev->next = next;
    }
    
    static HPT_INLINE void list_del(struct list_head *entry)
    {
            __list_del(entry->prev, entry->next);
    }
    
    static HPT_INLINE void list_del_init(struct list_head *entry)
    {
            __list_del(entry->prev, entry->next);
            INIT_LIST_HEAD(entry); 
    }
    
    static HPT_INLINE int list_empty(struct list_head *head)
    {
            HPT_ASSERT(!(head->next==head && head->prev!=head));
            return head->next == head;
    }
    
    static HPT_INLINE void __list_splice(struct list_head *list,
                                     struct list_head *head)
    {
            struct list_head *first = list->next;
            struct list_head *last = list->prev;
            struct list_head *at = head->next;
    
            first->prev = head;
            head->next = first;
    
            last->next = at;
            at->prev = last;
   }
   
   static HPT_INLINE void list_splice(struct list_head *list, struct list_head *head)
   {
           if (!list_empty(list))
                   __list_splice(list, head);
   }
   
   static HPT_INLINE void list_splice_init(struct list_head *list, struct list_head *head)
   {
           if (!list_empty(list)) {
                   __list_splice(list, head);
                   INIT_LIST_HEAD(list);
           }
   }
   
   #define list_entry(ptr, type, member) \
           ((type *)((char *)(ptr)-(HPT_UPTR)(&((type *)0)->member)))
   
   #define list_for_each(pos, head) \
           for (pos = (head)->next; pos != (head); pos = pos->next)
   
   #define list_for_each_safe(pos, n, head) \
           for (pos = (head)->next, n = pos->next; pos != (head); \
                   pos = n, n = pos->next)
   
   #define get_first_item(attached, type, member) \
           ((type *)((char *)((attached)->next)-(HPT_UPTR)(&((type *)0)->member)))
   
   #endif
   
   #endif

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