1 struct list { 2 struct list *next, *prev; 3 }; 4 5 static inline void 6 list_init(struct list *list) 7 { 8 list->next = list; 9 list->prev = list; 10 } 11 12 static inline int 13 list_empty(struct list *list) 14 { 15 return list->next == list; 16 } 17 18 static inline void 19 list_insert(struct list *link, struct list *new_link) 20 { 21 new_link->prev = link->prev; 22 new_link->next = link; 23 new_link->prev->next = new_link; 24 new_link->next->prev = new_link; 25 } 26 27 static inline void 28 list_append(struct list *list, struct list *new_link) 29 { 30 list_insert((struct list *)list, new_link); 31 } 32 33 static inline void 34 list_prepend(struct list *list, struct list *new_link) 35 { 36 list_insert(list->next, new_link); 37 } 38 39 static inline void 40 list_remove(struct list *link) 41 { 42 link->prev->next = link->next; 43 link->next->prev = link->prev; 44 } 45 46 #define list_entry(link, type, member) \ 47 ((type *)((char *)(link)-(unsigned long)(&((type *)0)->member))) 48 49 #define list_head(list, type, member) \ 50 list_entry((list)->next, type, member) 51 52 #define list_tail(list, type, member) \ 53 list_entry((list)->prev, type, member) 54 55 #define list_next(elm, member) \ 56 list_entry((elm)->member.next, typeof(*elm), member) 57 58 #define list_for_each_entry(pos, list, member) \ 59 for (pos = list_head(list, typeof(*pos), member); \ 60 &pos->member != (list); \ 61 pos = list_next(pos, member)) 62 63