1 #ifndef BABELTRACE_GRAPH_COMPONENT_CLASS_H
2 #define BABELTRACE_GRAPH_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
29 #include <babeltrace/graph/component-status.h>
30 #include <babeltrace/graph/notification-iterator.h>
31 #include <babeltrace/graph/query-executor.h>
32 #include <babeltrace/types.h>
38 struct bt_component_class
;
40 struct bt_private_component
;
41 struct bt_private_port
;
44 struct bt_private_connection_private_notification_iterator
;
45 struct bt_query_executor
;
48 * Component class type.
50 enum bt_component_class_type
{
51 BT_COMPONENT_CLASS_TYPE_UNKNOWN
= -1,
53 /** A source component is a notification generator. */
54 BT_COMPONENT_CLASS_TYPE_SOURCE
= 0,
56 /** A sink component handles incoming notifications. */
57 BT_COMPONENT_CLASS_TYPE_SINK
= 1,
59 /** A filter component implements both Source and Sink interfaces. */
60 BT_COMPONENT_CLASS_TYPE_FILTER
= 2,
63 struct bt_notification_iterator_next_method_return
{
64 struct bt_notification
*notification
;
65 enum bt_notification_iterator_status status
;
68 struct bt_component_class_query_method_return
{
69 struct bt_value
*result
;
70 enum bt_query_status status
;
73 typedef enum bt_component_status (*bt_component_class_init_method
)(
74 struct bt_private_component
*private_component
,
75 struct bt_value
*params
, void *init_method_data
);
77 typedef void (*bt_component_class_finalize_method
)(
78 struct bt_private_component
*private_component
);
80 typedef enum bt_notification_iterator_status
81 (*bt_component_class_notification_iterator_init_method
)(
82 struct bt_private_connection_private_notification_iterator
*notification_iterator
,
83 struct bt_private_port
*private_port
);
85 typedef void (*bt_component_class_notification_iterator_finalize_method
)(
86 struct bt_private_connection_private_notification_iterator
*notification_iterator
);
88 typedef struct bt_notification_iterator_next_method_return
89 (*bt_component_class_notification_iterator_next_method
)(
90 struct bt_private_connection_private_notification_iterator
*notification_iterator
);
92 typedef struct bt_component_class_query_method_return (*bt_component_class_query_method
)(
93 struct bt_component_class
*component_class
,
94 struct bt_query_executor
*query_executor
,
95 const char *object
, struct bt_value
*params
);
97 typedef enum bt_component_status (*bt_component_class_accept_port_connection_method
)(
98 struct bt_private_component
*private_component
,
99 struct bt_private_port
*self_private_port
,
100 struct bt_port
*other_port
);
102 typedef void (*bt_component_class_port_connected_method
)(
103 struct bt_private_component
*private_component
,
104 struct bt_private_port
*self_private_port
,
105 struct bt_port
*other_port
);
107 typedef void (*bt_component_class_port_disconnected_method
)(
108 struct bt_private_component
*private_component
,
109 struct bt_private_port
*private_port
);
111 extern int bt_component_class_set_init_method(
112 struct bt_component_class
*component_class
,
113 bt_component_class_init_method method
);
115 extern int bt_component_class_set_finalize_method(
116 struct bt_component_class
*component_class
,
117 bt_component_class_finalize_method method
);
119 extern int bt_component_class_set_accept_port_connection_method(
120 struct bt_component_class
*component_class
,
121 bt_component_class_accept_port_connection_method method
);
123 extern int bt_component_class_set_port_connected_method(
124 struct bt_component_class
*component_class
,
125 bt_component_class_port_connected_method method
);
127 extern int bt_component_class_set_port_disconnected_method(
128 struct bt_component_class
*component_class
,
129 bt_component_class_port_disconnected_method method
);
131 extern int bt_component_class_set_query_method(
132 struct bt_component_class
*component_class
,
133 bt_component_class_query_method method
);
135 extern int bt_component_class_set_description(
136 struct bt_component_class
*component_class
,
137 const char *description
);
139 extern int bt_component_class_set_help(
140 struct bt_component_class
*component_class
,
143 extern int bt_component_class_freeze(
144 struct bt_component_class
*component_class
);
147 * Get a component class' name.
149 * @param component_class Component class of which to get the name
150 * @returns Name of the component class
152 extern const char *bt_component_class_get_name(
153 struct bt_component_class
*component_class
);
156 * Get a component class' description.
158 * Component classes may provide an optional description. It may, however,
161 * @param component_class Component class of which to get the description
162 * @returns Description of the component class, or NULL.
164 extern const char *bt_component_class_get_description(
165 struct bt_component_class
*component_class
);
167 extern const char *bt_component_class_get_help(
168 struct bt_component_class
*component_class
);
171 * Get a component class' type.
173 * @param component_class Component class of which to get the type
174 * @returns One of #bt_component_type
176 extern enum bt_component_class_type
bt_component_class_get_type(
177 struct bt_component_class
*component_class
);
180 bt_bool
bt_component_class_is_source(struct bt_component_class
*component_class
)
182 return bt_component_class_get_type(component_class
) ==
183 BT_COMPONENT_CLASS_TYPE_SOURCE
;
187 bt_bool
bt_component_class_is_filter(struct bt_component_class
*component_class
)
189 return bt_component_class_get_type(component_class
) ==
190 BT_COMPONENT_CLASS_TYPE_FILTER
;
194 bt_bool
bt_component_class_is_sink(struct bt_component_class
*component_class
)
196 return bt_component_class_get_type(component_class
) ==
197 BT_COMPONENT_CLASS_TYPE_SINK
;
204 #endif /* BABELTRACE_GRAPH_COMPONENT_CLASS_H */