64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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struct list {
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struct list *next, *prev;
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};
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static inline void
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list_init(struct list *list)
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{
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list->next = list;
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list->prev = list;
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}
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static inline int
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list_empty(struct list *list)
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{
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return list->next == list;
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}
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static inline void
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list_insert(struct list *link, struct list *new_link)
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{
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new_link->prev = link->prev;
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new_link->next = link;
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new_link->prev->next = new_link;
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new_link->next->prev = new_link;
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}
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static inline void
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list_append(struct list *list, struct list *new_link)
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{
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list_insert((struct list *)list, new_link);
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}
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static inline void
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list_prepend(struct list *list, struct list *new_link)
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{
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list_insert(list->next, new_link);
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}
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static inline void
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list_remove(struct list *link)
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{
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link->prev->next = link->next;
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link->next->prev = link->prev;
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}
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#define list_entry(link, type, member) \
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((type *)((char *)(link)-(unsigned long)(&((type *)0)->member)))
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#define list_head(list, type, member) \
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list_entry((list)->next, type, member)
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#define list_tail(list, type, member) \
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list_entry((list)->prev, type, member)
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#define list_next(elm, member) \
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list_entry((elm)->member.next, typeof(*elm), member)
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#define list_for_each_entry(pos, list, member) \
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for (pos = list_head(list, typeof(*pos), member); \
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&pos->member != (list); \
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pos = list_next(pos, member))
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