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list: add iteration with a cursor

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Iterating a list with a cursor is heavier but is safe against removal
of any element in the list. Move the hook cursor iterator to list.
This commit is contained in:
Wim Taymans 2018-08-15 11:17:12 +02:00
parent ce4232cbc7
commit 5fe230e5ff
2 changed files with 19 additions and 11 deletions
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17
spa/include/spa/utils/list.h
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@ -84,7 +84,7 @@ static inline void spa_list_remove(struct spa_list *elem)
pos = spa_list_next(pos, member))
#define spa_list_for_each(pos, head, member) \
spa_list_for_each_next(pos, head, head, member) \
spa_list_for_each_next(pos, head, head, member)
#define spa_list_for_each_safe_next(pos, tmp, head, curr, member) \
for (pos = spa_list_first(curr, __typeof__(*pos), member), \
@ -94,7 +94,20 @@ static inline void spa_list_remove(struct spa_list *elem)
tmp = spa_list_next(pos, member))
#define spa_list_for_each_safe(pos, tmp, head, member) \
spa_list_for_each_safe_next(pos, tmp, head, head, member) \
spa_list_for_each_safe_next(pos, tmp, head, head, member)
#define spa_list_cursor_start(cursor, head, member) \
spa_list_prepend(head, &(cursor).member)
#define spa_list_for_each_cursor(pos, cursor, head, member) \
for(pos = spa_list_first(&(cursor).member, __typeof__(*(pos)), member); \
spa_list_remove(&(pos)->member), \
spa_list_append(&(cursor).member, &(pos)->member), \
!spa_list_is_end(pos, head, member); \
pos = spa_list_next(&cursor, member))
#define spa_list_cursor_end(cursor, member) \
spa_list_remove(&(cursor).member)
#ifdef __cplusplus
} /* extern "C" */