list.c

linux进程间高级通信的一个模块 是一个很不错的东西.

/*
 *	Fusion Kernel Module
 *
 *	(c) Copyright 2002-2003  Convergence GmbH
 *
 *      Written by Denis Oliver Kropp <[e-mail]>
 *
 *
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License
 *	as published by the Free Software Foundation; either version
 *	2 of the License, or (at your option) any later version.
 */

#include <linux/types.h>

#include "list.h"

void
fusion_list_prepend (FusionLink **list, FusionLink *link)
{
     link->prev = NULL;
     link->next = *list;

     if (*list)
          (*list)->prev = link;

     *list = link;
}

void
fusion_list_remove (FusionLink **list, FusionLink *link)
{
     if (link->prev)
          link->prev->next = link->next;
     else
          *list = link->next;

     if (link->next)
          link->next->prev = link->prev;

     link->next = link->prev = NULL;
}

void
fusion_list_move_to_front (FusionLink **list, FusionLink *link)
{
     if (*list == link)
          return;

     link->prev->next = link->next;

     if (link->next)
          link->next->prev = link->prev;

     link->prev = NULL;
     link->next = *list;

     (*list)->prev = link;

     *list = link;
}