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list: add first/last entry macros 

Signed-off-by: Rob Clark <robclark@freedesktop.org>
main
Rob Clark 2016-06-21 11:33:30 -04:00
parent dd1f372001
commit 1d1e01b235
1 changed files with 6 additions and 0 deletions
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6
util_double_list.h
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@ -98,6 +98,12 @@ static inline void list_delinit(struct list_head *item)
#define LIST_ENTRY(__type, __item, __field) \ #define LIST_ENTRY(__type, __item, __field) \
((__type *)(((char *)(__item)) - offsetof(__type, __field))) ((__type *)(((char *)(__item)) - offsetof(__type, __field)))
#define LIST_FIRST_ENTRY(__ptr, __type, __field) \
LIST_ENTRY(__type, (__ptr)->next, __field)
#define LIST_LAST_ENTRY(__ptr, __type, __field) \
LIST_ENTRY(__type, (__ptr)->prev, __field)
#define LIST_IS_EMPTY(__list) \ #define LIST_IS_EMPTY(__list) \
((__list)->next == (__list)) ((__list)->next == (__list))