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iwd/src/watchlist.h

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/*
*
* Wireless daemon for Linux
*
* Copyright (C) 2016-2017 Intel Corporation. All rights reserved.
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*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
typedef void (*watchlist_item_destroy_func_t)(void *data);
struct watchlist_item {
unsigned int id;
void *notify;
void *notify_data;
watchlist_item_destroy_func_t destroy;
};
struct watchlist_ops {
void (*item_free)(struct watchlist_item *item);
};
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struct watchlist {
int next_id;
struct l_queue *items;
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bool in_notify : 1;
bool stale_items : 1;
const struct watchlist_ops *ops;
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};
struct watchlist *watchlist_new(const struct watchlist_ops *ops);
void watchlist_init(struct watchlist *watchlist,
const struct watchlist_ops *ops);
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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);
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bool watchlist_remove(struct watchlist *watchlist, unsigned int id);
void watchlist_destroy(struct watchlist *watchlist);
void watchlist_free(struct watchlist *watchlist);
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void __watchlist_prune_stale(struct watchlist *watchlist);
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#define WATCHLIST_NOTIFY(watchlist, type, args...) \
do { \
const struct l_queue_entry *entry = \
l_queue_get_entries((watchlist)->items);\
\
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(watchlist)->in_notify = true; \
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for (; entry; entry = entry->next) { \
struct watchlist_item *item = entry->data; \
type t = item->notify; \
if (item->id == 0) \
continue; \
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t(args, item->notify_data); \
} \
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(watchlist)->in_notify = false; \
if ((watchlist)->stale_items) \
__watchlist_prune_stale(watchlist); \
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} while (false) \
#define WATCHLIST_NOTIFY_MATCHES(watchlist, match, match_data, type, args...) \
do { \
const struct l_queue_entry *entry = \
l_queue_get_entries((watchlist)->items);\
\
(watchlist)->in_notify = true; \
for (; entry; entry = entry->next) { \
struct watchlist_item *item = entry->data; \
type t = item->notify; \
\
if (item->id == 0) \
continue; \
if (!match(item, match_data)) \
continue; \
\
t(args, item->notify_data); \
} \
(watchlist)->in_notify = false; \
if ((watchlist)->stale_items) \
__watchlist_prune_stale(watchlist); \
} while (false)
#define WATCHLIST_NOTIFY_NO_ARGS(watchlist, type) \
do { \
const struct l_queue_entry *entry = \
l_queue_get_entries((watchlist)->items);\
\
(watchlist)->in_notify = true; \
for (; entry; entry = entry->next) { \
struct watchlist_item *item = entry->data; \
type t = item->notify; \
if (item->id == 0) \
continue; \
t(item->notify_data); \
} \
(watchlist)->in_notify = false; \
if ((watchlist)->stale_items) \
__watchlist_prune_stale(watchlist); \
} while (false)