/*
 * Copyright (c) 2004, Swedish Institute of Computer Science.
 * 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. 
 * 3. Neither the name of the Institute nor the names of its contributors 
 *    may be used to endorse or promote products derived from this software 
 *    without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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. 
 *
 * This file is part of the Contiki operating system.
 * 
 * Author: Adam Dunkels <adam@sics.se>
 *
 * $Id: list.h,v 1.3 2004/09/12 20:24:55 adamdunkels Exp $
 */
/**
 * \file
 * Linked list manipulation routines.
 * \author Adam Dunkels <adam@sics.se>
 *
 *
\code

struct packet {
   struct packet *next;
   char data[1500];
   int len;
};

LIST(packets, struct packet *);

static void
init_function(void) {
   list_init(&packets);
}

static void
another_function(struct packet *p) {
   list_add(packets, p);

   p = list_head(packets);

   p = list_tail(packets);
}

\endcode 
 */

#ifndef __LIST_H__
#define __LIST_H__

/**
 */
#define LIST(name, type) \
         static type name##_list; \
         static void **name = (void **)&name##_list; 
         

void  list_init(void **list);
void *list_head(void **list);
void *list_tail(void **list);
void *list_pop (void **list);
void  list_push(void **list, void *item);

void *list_chop(void **list);

void  list_add(void **list, void *item);


void  list_copy(void **dest, void **src);

#endif /* __LIST_H__ */