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list: check for empty list before insert

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We can't insert an empty list.
This commit is contained in:
Wim Taymans 2019-03-08 11:34:28 +01:00
parent 47fc2020c0
commit 964be84e1c
3 changed files with 7 additions and 7 deletions
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6
spa/include/spa/utils/list.h
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@ -41,6 +41,8 @@ static inline void spa_list_init(struct spa_list *list)
*list = SPA_LIST_INIT(list);
}
#define spa_list_is_empty(l) ((l)->next == (l))
static inline void spa_list_insert(struct spa_list *list, struct spa_list *elem)
{
elem->prev = list;
@ -51,6 +53,8 @@ static inline void spa_list_insert(struct spa_list *list, struct spa_list *elem)
static inline void spa_list_insert_list(struct spa_list *list, struct spa_list *other)
{
if (spa_list_is_empty(other))
return;
other->next->prev = list;
other->prev->next = list->next;
list->next->prev = other->prev;
@ -63,8 +67,6 @@ static inline void spa_list_remove(struct spa_list *elem)
elem->next->prev = elem->prev;
}
#define spa_list_is_empty(l) ((l)->next == (l))
#define spa_list_first(head, type, member) \
SPA_CONTAINER_OF((head)->next, type, member)