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/*************************************************************************//**
*
* Copyright © 2017 AT&T Intellectual Property. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
****************************************************************************/
/**************************************************************************//**
* @file
* A simple double-linked list.
*
* @note No thread protection so you will need to use appropriate
* synchronization if use spans multiple threads.
*
****************************************************************************/
#ifndef DOUBLE_LIST_INCLUDED
#define DOUBLE_LIST_INCLUDED
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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