/* * Copyright © 2010 Intel Corporation * Copyright © 2010 Francisco Jerez * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * */ #ifndef _LIST_H_ #define _LIST_H_ /* classic doubly-link circular list */ struct list { struct list *next, *prev; }; static void list_init(struct list *list) { list->next = list->prev = list; } static inline void __list_add(struct list *entry, struct list *prev, struct list *next) { next->prev = entry; entry->next = next; entry->prev = prev; prev->next = entry; } static inline void list_add(struct list *entry, struct list *head) { __list_add(entry, head, head->next); } static inline void __list_del(struct list *prev, struct list *next) { next->prev = prev; prev->next = next; } static inline void list_del(struct list *entry) { __list_del(entry->prev, entry->next); list_init(entry); } static inline Bool list_is_empty(const struct list *head) { return head->next == head; } #ifndef container_of #define container_of(ptr, type, member) \ (type *)((char *)(ptr) - (char *) &((type *)0)->member) #endif #define list_entry(ptr, type, member) \ container_of(ptr, type, member) #define list_first_entry(ptr, type, member) \ list_entry((ptr)->next, type, member) #define __container_of(ptr, sample, member) \ (void *)((char *)(ptr) \ - ((char *)&(sample)->member - (char *)(sample))) #define list_for_each_entry(pos, head, member) \ for (pos = __container_of((head)->next, pos, member); \ &pos->member != (head); \ pos = __container_of(pos->member.next, pos, member)) #define list_for_each_entry_safe(pos, tmp, head, member) \ for (pos = __container_of((head)->next, pos, member), \ tmp = __container_of(pos->member.next, pos, member); \ &pos->member != (head); \ pos = tmp, tmp = __container_of(pos->member.next, tmp, member)) static inline void list_append(struct list *entry, struct list *head) { __list_add(entry, head, head->next); } #endif