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#ifndef DOUBLE_LIST_INCLUDED
#define DOUBLE_LIST_INCLUDED
/**************************************************************************//**
* @file
* A simple double-linked list.
*
* @note No thread protection so you will need to use appropriate
* synchronization if use spans multiple threads.
*
* License
* -------
*
* Copyright(c) <2016>, AT&T Intellectual Property. All other 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement: This product includes
* software developed by the AT&T.
* 4. Neither the name of AT&T 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 AT&T INTELLECTUAL PROPERTY ''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 AT&T INTELLECTUAL PROPERTY 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.
*****************************************************************************/
typedef struct dlist_item
{
struct dlist_item * previous;
struct dlist_item * next;
void * item;
} DLIST_ITEM;
/**************************************************************************//**
* Double-linked list structure
*****************************************************************************/
typedef struct dlist
{
DLIST_ITEM * head;
DLIST_ITEM * tail;
} DLIST;
void dlist_initialize(DLIST * list);
void * dlist_pop_last(DLIST * list);
void dlist_push_first(DLIST * list, void * item);
void dlist_push_last(DLIST * list, void * item);
DLIST_ITEM * dlist_get_first(DLIST * list);
DLIST_ITEM * dlist_get_last(DLIST * list);
DLIST_ITEM * dlist_get_next(DLIST_ITEM * item);
int dlist_is_empty(DLIST * list);
int dlist_count(DLIST * list);
#endif
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