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 #ifdef __cplusplus 23 extern "C" { 24 #endif /* __cplusplus */ 25 26 struct listnode 27 { 28 struct listnode *next; 29 struct listnode *prev; 30 }; 31 32 #define node_to_item(node, container, member) \ 33 (container *) (((char*) (node)) - offsetof(container, member)) 34 35 #define list_declare(name) \ 36 struct listnode name = { \ 37 .next = &name, \ 38 .prev = &name, \ 39 } 40 41 #define list_for_each(node, list) \ 42 for (node = (list)->next; node != (list); node = node->next) 43 44 #define list_for_each_reverse(node, list) \ 45 for (node = (list)->prev; node != (list); node = node->prev) 46 47 void list_init(struct listnode *list); 48 void list_add_tail(struct listnode *list, struct listnode *item); 49 void list_remove(struct listnode *item); 50 51 #define list_empty(list) ((list) == (list)->next) 52 #define list_head(list) ((list)->next) 53 #define list_tail(list) ((list)->prev) 54 55 #ifdef __cplusplus 56 }; 57 #endif /* __cplusplus */ 58 59 #endif 60