Commit | Line | Data |
---|---|---|
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_INTERNAL_H | |
19 | #define LTTNG_NOTIFICATION_INTERNAL_H | |
20 | ||
21 | #include <lttng/notification/notification.h> | |
22 | #include <common/macros.h> | |
23 | #include <common/buffer-view.h> | |
24 | #include <stdint.h> | |
25 | #include <stdbool.h> | |
72756a3f | 26 | #include <sys/types.h> |
a58c490f JG |
27 | |
28 | struct lttng_notification { | |
29 | struct lttng_condition *condition; | |
30 | struct lttng_evaluation *evaluation; | |
31 | /* | |
32 | * The ownership of the notification's inner-elements depends | |
33 | * on the way it was created. The notification owns both | |
34 | * the condition and evaluation if it was obtained from a notification | |
35 | * channel (i.e. created using lttng_notification_create_from_buffer) | |
36 | * as the user may never access the condition and evaluation, | |
37 | * thus never getting a chance to free them. | |
38 | * | |
39 | * However, when the _private_ lttng_notification_create() function | |
40 | * is used, no ownership of condition and evaluation is assumed by | |
41 | * the notification object. The main reason for this change in | |
42 | * behavior is that internal users of this API only use the object | |
43 | * to use its serialization facilities. | |
44 | */ | |
45 | bool owns_elements; | |
46 | }; | |
47 | ||
48 | struct lttng_notification_comm { | |
49 | /* Size of the payload following this field. */ | |
50 | uint32_t length; | |
51 | /* Condition and evaluation objects follow. */ | |
52 | char payload[]; | |
53 | } LTTNG_PACKED; | |
54 | ||
55 | LTTNG_HIDDEN | |
56 | struct lttng_notification *lttng_notification_create( | |
57 | struct lttng_condition *condition, | |
58 | struct lttng_evaluation *evaluation); | |
59 | ||
60 | LTTNG_HIDDEN | |
61 | ssize_t lttng_notification_serialize(struct lttng_notification *notification, | |
62 | char *buf); | |
63 | ||
64 | LTTNG_HIDDEN | |
65 | ssize_t lttng_notification_create_from_buffer( | |
66 | const struct lttng_buffer_view *view, | |
67 | struct lttng_notification **notification); | |
68 | ||
69 | #endif /* LTTNG_NOTIFICATION_INTERNAL_H */ |