lib/cds/list.h
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 /* 
  * Copyright (C) 2005 iptelorg GmbH
  *
  * This file is part of ser, a free SIP server.
  *
  * ser 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
  *
  * For a license to use the ser software under conditions
  * other than those described here, or to purchase support for this
  * software, please contact iptel.org by e-mail at the following addresses:
  *    info@iptel.org
  *
  * ser is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
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  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
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  */
 
 #ifndef __LIST_H
 #define __LIST_H
 
 #define DOUBLE_LINKED_LIST_ADD(first,last,e)	do { \
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 		if (last) last->next = (e); \
 		else first = (e); \
 		(e)->next = NULL; \
 		(e)->prev = last; \
 		last = (e); \
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 	} while (0)
 
 #define DOUBLE_LINKED_LIST_REMOVE(first,last,e)	do { \
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 		if ((e)->next) (e)->next->prev = (e)->prev; \
 		else last = (e)->prev; \
 		if ((e)->prev) (e)->prev->next = (e)->next; \
 		else first = (e)->next; \
 		(e)->next = NULL; \
 		(e)->prev = NULL; \
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 	} while (0)
 
 #define LINKED_LIST_ADD(first,last,e)	do { \
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 		if (last) last->next = (e); \
 		else first = (e); \
 		(e)->next = NULL; \
 		last = (e); \
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 	} while (0)
 
 #endif