list.h revision ed8a7d84428ec945c48b6b53dc5a3a18fabaf683
1ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross/* 2ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross * Copyright (C) 2010 The Android Open Source Project 3ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross * 4ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross * Licensed under the Apache License, Version 2.0 (the "License"); 5ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross * you may not use this file except in compliance with the License. 6ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross * You may obtain a copy of the License at 7ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross * 8ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross * http://www.apache.org/licenses/LICENSE-2.0 9ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross * 10ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross * Unless required by applicable law or agreed to in writing, software 11ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross * distributed under the License is distributed on an "AS IS" BASIS, 12ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross * See the License for the specific language governing permissions and 14ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross * limitations under the License. 15ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross */ 16ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross 17ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#ifndef _INIT_LIST_H_ 18ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#define _INIT_LIST_H_ 19ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross 20ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Crossstruct listnode 21ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross{ 22ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross struct listnode *next; 23ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross struct listnode *prev; 24ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross}; 25ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross 26ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#define node_to_item(node, container, member) \ 27ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross (container *) (((char*) (node)) - offsetof(container, member)) 28ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross 29ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#define list_declare(name) \ 30ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross struct listnode name = { \ 31ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross .next = &name, \ 32ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross .prev = &name, \ 33ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross } 34ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross 35ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#define list_for_each(node, list) \ 36ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross for (node = (list)->next; node != (list); node = node->next) 37ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross 38ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Crossvoid list_init(struct listnode *list); 39ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Crossvoid list_add_tail(struct listnode *list, struct listnode *item); 40ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Crossvoid list_remove(struct listnode *item); 41ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross 42ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#define list_empty(list) ((list) == (list)->next) 43ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#define list_head(list) ((list)->next) 44ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#define list_tail(list) ((list)->prev) 45ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross 46ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#endif 47