61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
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typedef struct link
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{
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struct link *prev;
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struct link *next;
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}link_t;
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#define LIST_INITIALIZE(name) \
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link_t name = { .prev = &name, .next = &name }
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#define list_get_instance(link, type, member) \
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((type *)(((u8_t *)(link)) - ((u8_t *)&(((type *)NULL)->member))))
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static inline void link_initialize(link_t *link)
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{
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link->prev = NULL;
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link->next = NULL;
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}
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static inline void list_initialize(link_t *head)
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{
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head->prev = head;
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head->next = head;
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}
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static inline void list_append(link_t *link, link_t *head)
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{
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link->prev = head->prev;
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link->next = head;
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head->prev->next = link;
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head->prev = link;
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}
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static inline void list_remove(link_t *link)
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{
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link->next->prev = link->prev;
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link->prev->next = link->next;
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link_initialize(link);
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}
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static inline int list_empty(link_t *head)
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{
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return head->next == head ? 1 : 0;
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}
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static inline void list_prepend(link_t *link, link_t *head)
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{
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link->next = head->next;
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link->prev = head;
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head->next->prev = link;
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head->next = link;
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}
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static inline void list_insert(link_t *new, link_t *old)
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{
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new->prev = old->prev;
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new->next = old;
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new->prev->next = new;
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old->prev = new;
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}
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