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784cdc68 JG |
1 | /* |
2 | * component-connection.c | |
3 | * | |
4 | * Babeltrace Connection | |
5 | * | |
6 | * Copyright 2017 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/component/component-connection-internal.h> | |
30 | #include <babeltrace/component/component-graph-internal.h> | |
31 | #include <babeltrace/component/component-port-internal.h> | |
32 | #include <babeltrace/component/component-source-internal.h> | |
33 | #include <babeltrace/component/component-filter-internal.h> | |
34 | #include <babeltrace/object-internal.h> | |
35 | #include <babeltrace/compiler.h> | |
36 | #include <glib.h> | |
37 | ||
38 | static | |
39 | void bt_connection_destroy(struct bt_object *obj) | |
40 | { | |
41 | struct bt_connection *connection = container_of(obj, | |
42 | struct bt_connection, base); | |
43 | ||
44 | /* | |
45 | * No bt_put on ports as a connection only holds _weak_ references | |
46 | * to them. | |
47 | */ | |
48 | g_free(connection); | |
49 | } | |
50 | ||
51 | BT_HIDDEN | |
52 | struct bt_connection *bt_connection_create( | |
53 | struct bt_graph *graph, | |
54 | struct bt_port *upstream, struct bt_port *downstream) | |
55 | { | |
56 | struct bt_connection *connection = NULL; | |
57 | ||
58 | if (bt_port_get_type(upstream) != BT_PORT_TYPE_OUTPUT) { | |
59 | goto end; | |
60 | } | |
61 | if (bt_port_get_type(downstream) != BT_PORT_TYPE_INPUT) { | |
62 | goto end; | |
63 | } | |
64 | ||
65 | connection = g_new0(struct bt_connection, 1); | |
66 | if (!connection) { | |
67 | goto end; | |
68 | } | |
69 | ||
70 | bt_object_init(connection, bt_connection_destroy); | |
71 | /* Weak references are taken, see comment in header. */ | |
72 | connection->output_port = upstream; | |
73 | connection->input_port = downstream; | |
74 | bt_port_add_connection(upstream, connection); | |
75 | bt_port_add_connection(downstream, connection); | |
76 | bt_object_set_parent(connection, &graph->base); | |
77 | end: | |
78 | return connection; | |
79 | } | |
80 | ||
81 | struct bt_port *bt_connection_get_input_port( | |
82 | struct bt_connection *connection) | |
83 | { | |
84 | return connection ? connection->input_port : NULL; | |
85 | } | |
86 | ||
87 | struct bt_port *bt_connection_get_output_port( | |
88 | struct bt_connection *connection) | |
89 | { | |
90 | return connection ? connection->output_port : NULL; | |
91 | } | |
92 | ||
93 | struct bt_notification_iterator * | |
94 | bt_connection_create_notification_iterator(struct bt_connection *connection) | |
95 | { | |
96 | struct bt_component *upstream_component = NULL; | |
97 | struct bt_notification_iterator *it = NULL; | |
98 | ||
99 | if (!connection) { | |
100 | goto end; | |
101 | } | |
102 | ||
103 | upstream_component = bt_port_get_component(connection->output_port); | |
104 | assert(upstream_component); | |
105 | ||
106 | switch (bt_component_get_class_type(upstream_component)) { | |
107 | case BT_COMPONENT_CLASS_TYPE_SOURCE: | |
108 | it = bt_component_source_create_notification_iterator( | |
109 | upstream_component); | |
110 | break; | |
111 | case BT_COMPONENT_CLASS_TYPE_FILTER: | |
112 | it = bt_component_filter_create_notification_iterator( | |
113 | upstream_component); | |
114 | break; | |
115 | default: | |
116 | goto end; | |
117 | } | |
118 | end: | |
119 | bt_put(upstream_component); | |
120 | return it; | |
121 | } |