1 #ifndef BABELTRACE_COMPONENT_COMPONENT_CLASS_H
2 #define BABELTRACE_COMPONENT_COMPONENT_CLASS_H
5 * Babeltrace - Component Class Interface.
7 * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 * of this software and associated documentation files (the "Software"), to deal
11 * in the Software without restriction, including without limitation the rights
12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 * copies of the Software, and to permit persons to whom the Software is
14 * furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
28 #include <babeltrace/component/component.h>
34 struct bt_component_class
;
37 * Component class type.
39 enum bt_component_class_type
{
40 BT_COMPONENT_CLASS_TYPE_UNKNOWN
= -1,
42 /** A source component is a notification generator. */
43 BT_COMPONENT_CLASS_TYPE_SOURCE
= 0,
45 /** A sink component handles incoming notifications. */
46 BT_COMPONENT_CLASS_TYPE_SINK
= 1,
48 /** A filter component implements both Source and Sink interfaces. */
49 BT_COMPONENT_CLASS_TYPE_FILTER
= 2,
52 typedef enum bt_component_status (*bt_component_class_init_method
)(
53 struct bt_component
*component
, struct bt_value
*params
);
55 typedef void (*bt_component_class_destroy_method
)(struct bt_component
*component
);
57 extern int bt_component_class_set_init_method(
58 struct bt_component_class
*component_class
,
59 bt_component_class_init_method init_method
);
61 extern int bt_component_class_set_destroy_method(
62 struct bt_component_class
*component_class
,
63 bt_component_class_destroy_method destroy_method
);
65 extern int bt_component_class_set_description(
66 struct bt_component_class
*component_class
,
67 const char *description
);
69 extern int bt_component_class_freeze(
70 struct bt_component_class
*component_class
);
73 * Get a component class' name.
75 * @param component_class Component class of which to get the name
76 * @returns Name of the component class
78 extern const char *bt_component_class_get_name(
79 struct bt_component_class
*component_class
);
82 * Get a component class' description.
84 * Component classes may provide an optional description. It may, however,
87 * @param component_class Component class of which to get the description
88 * @returns Description of the component class, or NULL.
90 extern const char *bt_component_class_get_description(
91 struct bt_component_class
*component_class
);
94 * Get a component class' type.
96 * @param component_class Component class of which to get the type
97 * @returns One of #bt_component_type
99 extern enum bt_component_class_type
bt_component_class_get_type(
100 struct bt_component_class
*component_class
);
106 #endif /* BABELTRACE_COMPONENT_COMPONENT_CLASS_H */