list.h revision 0009b73ed88f5c1759c3b2d9df73492d53f79039
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#include <sys/cdefs.h> 22 23__BEGIN_DECLS 24 25struct listnode 26{ 27 struct listnode *next; 28 struct listnode *prev; 29}; 30 31#define node_to_item(node, container, member) \ 32 (container *) (((char*) (node)) - offsetof(container, member)) 33 34#define list_declare(name) \ 35 struct listnode name = { \ 36 .next = &name, \ 37 .prev = &name, \ 38 } 39 40#define list_for_each(node, list) \ 41 for (node = (list)->next; node != (list); node = node->next) 42 43#define list_for_each_reverse(node, list) \ 44 for (node = (list)->prev; node != (list); node = node->prev) 45 46void list_init(struct listnode *list); 47void list_add_tail(struct listnode *list, struct listnode *item); 48void list_remove(struct listnode *item); 49 50#define list_empty(list) ((list) == (list)->next) 51#define list_head(list) ((list)->next) 52#define list_tail(list) ((list)->prev) 53 54__END_DECLS 55 56#endif 57