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 _CUTILS_LIST_H_ 18 #define _CUTILS_LIST_H_ 19 20 #include <stddef.h> 21 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 40 #define list_for_each_reverse(node, list) \ 41 for (node = (list)->prev; node != (list); node = node->prev) 42 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 52