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util/list: Add C99-based iterator macros

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v2: Use LIST_ENTRY instead of container_of in iterators

Acked-by: Connor Abbott <cwabbott0@gmail.com>
Reviewed-by: Rob Clark <robclark@freedesktop.org>
This commit is contained in:
Jason Ekstrand
2015-04-27 18:56:02 -07:00
parent 7a30668ad6
commit b31d8983ba
1 changed files with 34 additions and 0 deletions
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src/util/list.h
+34
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@@ -143,4 +143,38 @@ static inline void list_delinit(struct list_head *item)
&pos->member != (head); \
pos = container_of(pos->member.prev, pos, member))
#define list_for_each_entry(type, pos, head, member) \
for (type *pos = LIST_ENTRY(type, (head)->next, member); \
&pos->member != (head); \
pos = LIST_ENTRY(type, pos->member.next, member))
#define list_for_each_entry_safe(type, pos, head, member) \
for (type *pos = LIST_ENTRY(type, (head)->next, member), \
*__next = LIST_ENTRY(type, pos->member.next, member); \
&pos->member != (head); \
pos = __next, \
__next = LIST_ENTRY(type, __next->member.next, member))
#define list_for_each_entry_rev(type, pos, head, member) \
for (type *pos = LIST_ENTRY(type, (head)->prev, member); \
&pos->member != (head); \
pos = LIST_ENTRY(type, pos->member.prev, member))
#define list_for_each_entry_safe_rev(type, pos, head, member) \
for (type *pos = LIST_ENTRY(type, (head)->prev, member), \
*__prev = LIST_ENTRY(type, pos->member.prev, member); \
&pos->member != (head); \
pos = __prev, \
__prev = LIST_ENTRY(type, __prev->member.prev, member))
#define list_for_each_entry_from(type, pos, start, head, member) \
for (type *pos = LIST_ENTRY(type, (start), member); \
&pos->member != (head); \
pos = LIST_ENTRY(type, pos->member.next, member))
#define list_for_each_entry_from_rev(type, pos, start, head, member) \
for (type *pos = LIST_ENTRY(type, (start), member); \
&pos->member != (head); \
pos = LIST_ENTRY(type, pos->member.prev, member))
#endif /*_UTIL_LIST_H_*/