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eina: Add eina_clist_element_is_linked() 

Allows checking whether an entry is linked or not.

Signed-off-by: Mike McCormack <mj.mccormack@samsung.com>

SVN revision: 64029
This commit is contained in:
Mike McCormack 2011-10-13 02:22:18 +00:00 committed by Mike McCormack
parent 850ba388a2
commit ff34e5a0a9
1 changed files with 15 additions and 0 deletions
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15
legacy/eina/src/include/eina_clist.h
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@ -34,6 +34,7 @@
* - O(N) time to calculate list length
* - requires one list entry in a struct per list (i.e. it's an inlist)
* - requires a head/tail pointer
* - need to know the list head when moving to next or previous pointer
*
* Things to note:
* - there's no NULL at the end of the list, the last item points to the head
@ -111,11 +112,25 @@ static inline void eina_clist_add_tail(Eina_Clist *list, Eina_Clist *elem)
eina_clist_add_before(list, elem);
}
/* init an (unlinked) element */
static inline void eina_clist_element_init(Eina_Clist *elem)
{
elem->next = NULL;
elem->next = NULL;
}
/* check if an element is in a list or not */
static inline int eina_clist_element_is_linked(Eina_Clist *elem)
{
return (elem->next != NULL && elem->prev != NULL);
}
/* remove an element from its list */
static inline void eina_clist_remove(Eina_Clist *elem)
{
elem->next->prev = elem->prev;
elem->prev->next = elem->next;
eina_clist_element_init(elem);
}
/* get the next element */