Add notification utility library
[babeltrace.git] / lib / plugin-system / iterator.c
1 /*
2 * iterator.c
3 *
4 * Babeltrace Notification Iterator
5 *
6 * Copyright 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com>
7 *
8 * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining a copy
11 * of this software and associated documentation files (the "Software"), to deal
12 * in the Software without restriction, including without limitation the rights
13 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14 * copies of the Software, and to permit persons to whom the Software is
15 * furnished to do so, subject to the following conditions:
16 *
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
23 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
26 * SOFTWARE.
27 */
28
29 #include <babeltrace/compiler.h>
30 #include <babeltrace/ref.h>
31 #include <babeltrace/plugin/component.h>
32 #include <babeltrace/plugin/source-internal.h>
33 #include <babeltrace/plugin/notification/iterator.h>
34 #include <babeltrace/plugin/notification/iterator-internal.h>
35
36 static
37 void bt_notification_iterator_destroy(struct bt_object *obj)
38 {
39 struct bt_notification_iterator *iterator;
40
41 assert(obj);
42 iterator = container_of(obj, struct bt_notification_iterator,
43 base);
44 assert(iterator->user_destroy || !iterator->user_data);
45 iterator->user_destroy(iterator);
46 g_free(iterator);
47 }
48
49 BT_HIDDEN
50 struct bt_notification_iterator *bt_notification_iterator_create(
51 struct bt_component *component)
52 {
53 struct bt_notification_iterator *iterator = NULL;
54
55 if (!component ||
56 bt_component_get_type(component) != BT_COMPONENT_TYPE_SOURCE) {
57 goto end;
58 }
59
60 iterator = g_new0(struct bt_notification_iterator, 1);
61 if (!iterator) {
62 goto end;
63 }
64
65 bt_object_init(iterator, bt_notification_iterator_destroy);
66 end:
67 return iterator;
68 }
69
70 BT_HIDDEN
71 enum bt_notification_iterator_status bt_notification_iterator_validate(
72 struct bt_notification_iterator *iterator)
73 {
74 enum bt_notification_iterator_status ret =
75 BT_NOTIFICATION_ITERATOR_STATUS_OK;
76
77 if (!iterator || !iterator->get || !iterator->next) {
78 ret = BT_NOTIFICATION_ITERATOR_STATUS_INVAL;
79 goto end;
80 }
81 end:
82 return ret;
83 }
84
85 enum bt_notification_iterator_status bt_notification_iterator_set_get_cb(
86 struct bt_notification_iterator *iterator,
87 bt_notification_iterator_get_cb get)
88 {
89 enum bt_notification_iterator_status ret =
90 BT_NOTIFICATION_ITERATOR_STATUS_OK;
91
92 if (!iterator || !get) {
93 ret = BT_NOTIFICATION_ITERATOR_STATUS_INVAL;
94 goto end;
95 }
96
97
98 end:
99 return ret;
100 }
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