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watchlist: Support polymorphic watchlist_items

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This commit is contained in:
Denis Kenzior 2017-08-31 17:57:16 -05:00
parent 4a9d8278b4
commit 2071fb7836
2 changed files with 52 additions and 27 deletions
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65
src/watchlist.c
View File

@ -36,29 +36,49 @@ static bool watchlist_item_match(const void *a, const void *b)
return item->id == id;
}
static void watchlist_item_free(void *data)
static void __watchlist_item_free(struct watchlist *watchlist,
struct watchlist_item *item)
{
struct watchlist_item *item = data;
if (item->destroy)
item->destroy(item->notify_data);
l_free(item);
if (watchlist->ops && watchlist->ops->item_free)
watchlist->ops->item_free(item);
else
l_free(item);
}
struct watchlist *watchlist_new(void)
struct watchlist *watchlist_new(const struct watchlist_ops *ops)
{
struct watchlist *watchlist;
watchlist = l_new(struct watchlist, 1);
watchlist->items = l_queue_new();
watchlist->ops = ops;
return watchlist;
}
void watchlist_init(struct watchlist *watchlist)
void watchlist_init(struct watchlist *watchlist,
const struct watchlist_ops *ops)
{
watchlist->next_id = 0;
watchlist->items = l_queue_new();
watchlist->ops = ops;
}
unsigned int watchlist_link(struct watchlist *watchlist,
struct watchlist_item *item,
void *notify, void *notify_data,
watchlist_item_destroy_func_t destroy)
{
item->id = ++watchlist->next_id;
item->notify = notify;
item->notify_data = notify_data;
item->destroy = destroy;
l_queue_push_tail(watchlist->items, item);
return item->id;
}
unsigned int watchlist_add(struct watchlist *watchlist, void *notify,
@ -68,14 +88,7 @@ unsigned int watchlist_add(struct watchlist *watchlist, void *notify,
struct watchlist_item *item;
item = l_new(struct watchlist_item, 1);
item->id = ++watchlist->next_id;
item->notify = notify;
item->notify_data = notify_data;
item->destroy = destroy;
l_queue_push_tail(watchlist->items, item);
return item->id;
return watchlist_link(watchlist, item, notify, notify_data, destroy);
}
bool watchlist_remove(struct watchlist *watchlist, unsigned int id)
@ -99,22 +112,28 @@ bool watchlist_remove(struct watchlist *watchlist, unsigned int id)
if (!item)
return false;
if (item->destroy)
item->destroy(item->notify_data);
__watchlist_item_free(watchlist, item);
l_free(item);
return true;
}
static void __watchlist_clear(struct watchlist *watchlist)
{
struct watchlist_item *item;
while ((item = l_queue_pop_head(watchlist->items)))
__watchlist_item_free(watchlist, item);
}
void watchlist_destroy(struct watchlist *watchlist)
{
l_queue_destroy(watchlist->items, watchlist_item_free);
__watchlist_clear(watchlist);
watchlist->items = NULL;
}
void watchlist_free(struct watchlist *watchlist)
{
l_queue_destroy(watchlist->items, watchlist_item_free);
__watchlist_clear(watchlist);
l_free(watchlist);
}
@ -123,12 +142,8 @@ void __watchlist_prune_stale(struct watchlist *watchlist)
struct watchlist_item *item;
while ((item = l_queue_remove_if(watchlist->items, watchlist_item_match,
L_UINT_TO_PTR(0)))) {
if (item->destroy)
item->destroy(item->notify_data);
l_free(item);
}
L_UINT_TO_PTR(0))))
__watchlist_item_free(watchlist, item);
watchlist->stale_items = false;
}

14
src/watchlist.h
View File

@ -29,18 +29,28 @@ struct watchlist_item {
watchlist_item_destroy_func_t destroy;
};
struct watchlist_ops {
void (*item_free)(struct watchlist_item *item);
};
struct watchlist {
int next_id;
struct l_queue *items;
bool in_notify : 1;
bool stale_items : 1;
const struct watchlist_ops *ops;
};
struct watchlist *watchlist_new(void);
void watchlist_init(struct watchlist *watchlist);
struct watchlist *watchlist_new(const struct watchlist_ops *ops);
void watchlist_init(struct watchlist *watchlist,
const struct watchlist_ops *ops);
unsigned int watchlist_add(struct watchlist *watchlist, void *notify,
void *notify_data,
watchlist_item_destroy_func_t destroy);
unsigned int watchlist_link(struct watchlist *watchlist,
struct watchlist_item *item,
void *notify, void *notify_data,
watchlist_item_destroy_func_t destroy);
bool watchlist_remove(struct watchlist *watchlist, unsigned int id);
void watchlist_destroy(struct watchlist *watchlist);
void watchlist_free(struct watchlist *watchlist);