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a58c490f JG |
1 | /* |
2 | * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
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. | |
7 | * | |
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 | |
11 | * for more details. | |
12 | * | |
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 | |
16 | */ | |
17 | ||
18 | #ifndef LTTNG_NOTIFICATION_CHANNEL_H | |
19 | #define LTTNG_NOTIFICATION_CHANNEL_H | |
20 | ||
21 | #ifdef __cplusplus | |
22 | extern "C" { | |
23 | #endif | |
24 | ||
25 | struct lttng_endpoint; | |
26 | struct lttng_condition; | |
27 | struct lttng_notification; | |
28 | struct lttng_notification_channel; | |
29 | ||
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, | |
41 | }; | |
42 | ||
43 | extern struct lttng_notification_channel *lttng_notification_channel_create( | |
44 | struct lttng_endpoint *endpoint); | |
45 | ||
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); | |
50 | ||
51 | extern enum lttng_notification_channel_status | |
52 | lttng_notification_channel_subscribe( | |
53 | struct lttng_notification_channel *channel, | |
54 | const struct lttng_condition *condition); | |
55 | ||
56 | extern enum lttng_notification_channel_status | |
57 | lttng_notification_channel_unsubscribe( | |
58 | struct lttng_notification_channel *channel, | |
59 | const struct lttng_condition *condition); | |
60 | ||
61 | extern void lttng_notification_channel_destroy( | |
62 | struct lttng_notification_channel *channel); | |
63 | ||
64 | #ifdef __cplusplus | |
65 | } | |
66 | #endif | |
67 | ||
68 | #endif /* LTTNG_NOTIFICATION_CHANNEL_H */ |