64 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2struct list {3 struct list *next, *prev;4};5 6static inline void7list_init(struct list *list)8{9 list->next = list;10 list->prev = list;11}12 13static inline int14list_empty(struct list *list)15{16 return list->next == list;17}18 19static inline void20list_insert(struct list *link, struct list *new_link)21{22 new_link->prev = link->prev;23 new_link->next = link;24 new_link->prev->next = new_link;25 new_link->next->prev = new_link;26}27 28static inline void29list_append(struct list *list, struct list *new_link)30{31 list_insert((struct list *)list, new_link);32}33 34static inline void35list_prepend(struct list *list, struct list *new_link)36{37 list_insert(list->next, new_link);38}39 40static inline void41list_remove(struct list *link)42{43 link->prev->next = link->next;44 link->next->prev = link->prev;45}46 47#define list_entry(link, type, member) \48 ((type *)((char *)(link)-(unsigned long)(&((type *)0)->member)))49 50#define list_head(list, type, member) \51 list_entry((list)->next, type, member)52 53#define list_tail(list, type, member) \54 list_entry((list)->prev, type, member)55 56#define list_next(elm, member) \57 list_entry((elm)->member.next, typeof(*elm), member)58 59#define list_for_each_entry(pos, list, member) \60 for (pos = list_head(list, typeof(*pos), member); \61 &pos->member != (list); \62 pos = list_next(pos, member))63 64