2 * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
4 * This library is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU Lesser General Public License, version 2.1 only,
6 * as published by the Free Software Foundation.
8 * This library is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
13 * You should have received a copy of the GNU Lesser General Public License
14 * along with this library; if not, write to the Free Software Foundation,
15 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 #ifndef LTTNG_NOTIFICATION_CHANNEL_H
19 #define LTTNG_NOTIFICATION_CHANNEL_H
25 struct lttng_endpoint
;
26 struct lttng_condition
;
27 struct lttng_notification
;
28 struct lttng_notification_channel
;
30 /* LTTng Notification channel */
31 enum lttng_notification_channel_status
{
32 LTTNG_NOTIFICATION_CHANNEL_STATUS_NOTIFICATIONS_DROPPED
= 1,
33 LTTNG_NOTIFICATION_CHANNEL_STATUS_OK
= 0,
34 LTTNG_NOTIFICATION_CHANNEL_STATUS_ERROR
= -1,
35 LTTNG_NOTIFICATION_CHANNEL_STATUS_CLOSED
= -2,
36 LTTNG_NOTIFICATION_CHANNEL_STATUS_ALREADY_SUBSCRIBED
= -3,
37 /* Condition unknown. */
38 LTTNG_NOTIFICATION_CHANNEL_STATUS_UNKNOWN_CONDITION
= -4,
39 LTTNG_NOTIFICATION_CHANNEL_STATUS_INVALID
= -5,
40 LTTNG_NOTIFICATION_CHANNEL_STATUS_UNSUPPORTED_VERSION
= -6,
43 extern struct lttng_notification_channel
*lttng_notification_channel_create(
44 struct lttng_endpoint
*endpoint
);
46 extern enum lttng_notification_channel_status
47 lttng_notification_channel_get_next_notification(
48 struct lttng_notification_channel
*channel
,
49 struct lttng_notification
**notification
);
51 extern enum lttng_notification_channel_status
52 lttng_notification_channel_subscribe(
53 struct lttng_notification_channel
*channel
,
54 const struct lttng_condition
*condition
);
56 extern enum lttng_notification_channel_status
57 lttng_notification_channel_unsubscribe(
58 struct lttng_notification_channel
*channel
,
59 const struct lttng_condition
*condition
);
61 extern void lttng_notification_channel_destroy(
62 struct lttng_notification_channel
*channel
);
68 #endif /* LTTNG_NOTIFICATION_CHANNEL_H */