Colin Cross | ed8a7d8 | 2010-04-19 17:05:34 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 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 | #ifndef _INIT_LIST_H_ |
| 18 | #define _INIT_LIST_H_ |
| 19 | |
Olivier Bailly | b93e581 | 2010-11-17 11:47:23 -0800 | [diff] [blame] | 20 | #include <stddef.h> |
| 21 | |
Colin Cross | ed8a7d8 | 2010-04-19 17:05:34 -0700 | [diff] [blame] | 22 | struct listnode |
| 23 | { |
| 24 | struct listnode *next; |
| 25 | struct listnode *prev; |
| 26 | }; |
| 27 | |
| 28 | #define node_to_item(node, container, member) \ |
| 29 | (container *) (((char*) (node)) - offsetof(container, member)) |
| 30 | |
| 31 | #define list_declare(name) \ |
| 32 | struct listnode name = { \ |
| 33 | .next = &name, \ |
| 34 | .prev = &name, \ |
| 35 | } |
| 36 | |
| 37 | #define list_for_each(node, list) \ |
| 38 | for (node = (list)->next; node != (list); node = node->next) |
| 39 | |
Colin Cross | 44b65d0 | 2010-04-20 14:32:50 -0700 | [diff] [blame] | 40 | #define list_for_each_reverse(node, list) \ |
| 41 | for (node = (list)->prev; node != (list); node = node->prev) |
| 42 | |
Colin Cross | ed8a7d8 | 2010-04-19 17:05:34 -0700 | [diff] [blame] | 43 | void list_init(struct listnode *list); |
| 44 | void list_add_tail(struct listnode *list, struct listnode *item); |
| 45 | void list_remove(struct listnode *item); |
| 46 | |
| 47 | #define list_empty(list) ((list) == (list)->next) |
| 48 | #define list_head(list) ((list)->next) |
| 49 | #define list_tail(list) ((list)->prev) |
| 50 | |
| 51 | #endif |