1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <cutils/list.h>
18
19void list_init(struct listnode *node)
20{
21    node->next = node;
22    node->prev = node;
23}
24
25void list_add_tail(struct listnode *head, struct listnode *item)
26{
27    item->next = head;
28    item->prev = head->prev;
29    head->prev->next = item;
30    head->prev = item;
31}
32
33void list_remove(struct listnode *item)
34{
35    item->next->prev = item->prev;
36    item->prev->next = item->next;
37}
38