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util/list: Add a list pair iterator

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Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5019>
This commit is contained in:
Jason Ekstrand 2019-08-05 16:19:06 -05:00 • committed by Marge Bot
parent 5425968d2e
commit aeb95fda54
1 changed files with 7 additions and 0 deletions
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7
src/util/list.h
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@ -246,4 +246,11 @@ static inline void list_validate(const struct list_head *list)
&pos->member != (head); \
pos = LIST_ENTRY(type, pos->member.prev, member))
#define list_pair_for_each_entry(type, pos1, pos2, head1, head2, member) \
for (type *pos1 = LIST_ENTRY(type, (head1)->next, member), \
*pos2 = LIST_ENTRY(type, (head2)->next, member); \
&pos1->member != (head1) && &pos2->member != (head2); \
pos1 = LIST_ENTRY(type, pos1->member.next, member), \
pos2 = LIST_ENTRY(type, pos2->member.next, member))
#endif /*_UTIL_LIST_H_*/