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Code Issues Releases Wiki Activity

list: added new list_index() function

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This commit is contained in:
Steffen Vogel 2018-03-26 12:52:04 +02:00
parent e3fc832a0c
commit e32fe06efd
2 changed files with 31 additions and 0 deletions
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7
include/villas/list.h
View file

@ -110,3 +110,10 @@ void list_sort(struct list *l, cmp_cb_t cmp);
/** Set single element in list */
int list_set(struct list *l, int index, void *value);
/** Return index in list for value.
*
* @retval <0 No list entry matching \p value was found.
* @retval >=0 Entry \p value was found at returned index.
*/
ssize_t list_index(struct list *l, void *value);

24
lib/list.c
View file

@ -198,3 +198,27 @@ int list_set(struct list *l, int index, void *value)
return 0;
}
ssize_t list_index(struct list *l, void *p)
{
void *e;
ssize_t f;
pthread_mutex_lock(&l->lock);
assert(l->state == STATE_INITIALIZED);
for (size_t i = 0; i < list_length(l); i++) {
e = list_at(l, i);
if (e == p) {
f = i;
goto found;
}
}
f = -1;
found: pthread_mutex_unlock(&l->lock);
return f;
}