Commit | Line | Data |
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784cdc68 | 1 | /* |
7d55361f | 2 | * connection.c |
784cdc68 JG |
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 | ||
b2e0c907 PP |
29 | #include <babeltrace/graph/notification-iterator-internal.h> |
30 | #include <babeltrace/graph/component-internal.h> | |
31 | #include <babeltrace/graph/component-source-internal.h> | |
32 | #include <babeltrace/graph/component-filter-internal.h> | |
33 | #include <babeltrace/graph/connection-internal.h> | |
34 | #include <babeltrace/graph/private-connection.h> | |
35 | #include <babeltrace/graph/graph-internal.h> | |
36 | #include <babeltrace/graph/port-internal.h> | |
784cdc68 JG |
37 | #include <babeltrace/object-internal.h> |
38 | #include <babeltrace/compiler.h> | |
39 | #include <glib.h> | |
40 | ||
41 | static | |
42 | void bt_connection_destroy(struct bt_object *obj) | |
43 | { | |
44 | struct bt_connection *connection = container_of(obj, | |
45 | struct bt_connection, base); | |
46 | ||
47 | /* | |
48 | * No bt_put on ports as a connection only holds _weak_ references | |
49 | * to them. | |
50 | */ | |
51 | g_free(connection); | |
52 | } | |
53 | ||
890882ef PP |
54 | struct bt_connection *bt_connection_from_private_connection( |
55 | struct bt_private_connection *private_connection) | |
56 | { | |
57 | return bt_get(bt_connection_from_private(private_connection)); | |
58 | } | |
59 | ||
784cdc68 JG |
60 | BT_HIDDEN |
61 | struct bt_connection *bt_connection_create( | |
62 | struct bt_graph *graph, | |
72b913fb PP |
63 | struct bt_port *upstream_port, |
64 | struct bt_port *downstream_port) | |
784cdc68 JG |
65 | { |
66 | struct bt_connection *connection = NULL; | |
67 | ||
72b913fb | 68 | if (bt_port_get_type(upstream_port) != BT_PORT_TYPE_OUTPUT) { |
784cdc68 JG |
69 | goto end; |
70 | } | |
72b913fb | 71 | if (bt_port_get_type(downstream_port) != BT_PORT_TYPE_INPUT) { |
784cdc68 JG |
72 | goto end; |
73 | } | |
74 | ||
75 | connection = g_new0(struct bt_connection, 1); | |
76 | if (!connection) { | |
77 | goto end; | |
78 | } | |
79 | ||
80 | bt_object_init(connection, bt_connection_destroy); | |
81 | /* Weak references are taken, see comment in header. */ | |
72b913fb PP |
82 | connection->upstream_port = upstream_port; |
83 | connection->downstream_port = downstream_port; | |
84 | bt_port_set_connection(upstream_port, connection); | |
85 | bt_port_set_connection(downstream_port, connection); | |
784cdc68 JG |
86 | bt_object_set_parent(connection, &graph->base); |
87 | end: | |
88 | return connection; | |
89 | } | |
90 | ||
72b913fb | 91 | BT_HIDDEN |
2038affb | 92 | void bt_connection_disconnect_ports(struct bt_connection *conn) |
72b913fb PP |
93 | { |
94 | struct bt_component *downstream_comp = NULL; | |
95 | struct bt_component *upstream_comp = NULL; | |
96 | struct bt_port *downstream_port = conn->downstream_port; | |
97 | struct bt_port *upstream_port = conn->upstream_port; | |
f345f8bb | 98 | struct bt_graph *graph = (void *) bt_object_get_parent(conn); |
72b913fb PP |
99 | |
100 | if (downstream_port) { | |
101 | downstream_comp = bt_port_get_component(downstream_port); | |
102 | bt_port_set_connection(downstream_port, NULL); | |
103 | conn->downstream_port = NULL; | |
104 | } | |
105 | ||
106 | if (upstream_port) { | |
107 | upstream_comp = bt_port_get_component(upstream_port); | |
108 | bt_port_set_connection(upstream_port, NULL); | |
109 | conn->upstream_port = NULL; | |
110 | } | |
111 | ||
2038affb | 112 | if (downstream_comp) { |
72b913fb PP |
113 | bt_component_port_disconnected(downstream_comp, |
114 | downstream_port); | |
115 | } | |
116 | ||
2038affb | 117 | if (upstream_comp) { |
72b913fb PP |
118 | bt_component_port_disconnected(upstream_comp, upstream_port); |
119 | } | |
120 | ||
f345f8bb PP |
121 | assert(graph); |
122 | bt_graph_notify_ports_disconnected(graph, upstream_comp, | |
123 | downstream_comp, upstream_port, downstream_port); | |
72b913fb PP |
124 | bt_put(downstream_comp); |
125 | bt_put(upstream_comp); | |
f345f8bb | 126 | bt_put(graph); |
72b913fb PP |
127 | } |
128 | ||
129 | struct bt_port *bt_connection_get_upstream_port( | |
784cdc68 JG |
130 | struct bt_connection *connection) |
131 | { | |
72b913fb | 132 | return connection ? bt_get(connection->upstream_port) : NULL; |
784cdc68 JG |
133 | } |
134 | ||
72b913fb | 135 | struct bt_port *bt_connection_get_downstream_port( |
784cdc68 JG |
136 | struct bt_connection *connection) |
137 | { | |
72b913fb | 138 | return connection ? bt_get(connection->downstream_port) : NULL; |
784cdc68 JG |
139 | } |
140 | ||
141 | struct bt_notification_iterator * | |
890882ef PP |
142 | bt_private_connection_create_notification_iterator( |
143 | struct bt_private_connection *private_connection) | |
784cdc68 | 144 | { |
890882ef PP |
145 | enum bt_notification_iterator_status ret_iterator; |
146 | enum bt_component_class_type upstream_comp_class_type; | |
147 | struct bt_notification_iterator *iterator = NULL; | |
148 | struct bt_port *upstream_port = NULL; | |
784cdc68 | 149 | struct bt_component *upstream_component = NULL; |
890882ef PP |
150 | struct bt_component_class *upstream_comp_class = NULL; |
151 | struct bt_connection *connection = NULL; | |
152 | bt_component_class_notification_iterator_init_method init_method = NULL; | |
784cdc68 | 153 | |
890882ef PP |
154 | if (!private_connection) { |
155 | goto error; | |
784cdc68 JG |
156 | } |
157 | ||
890882ef PP |
158 | connection = bt_connection_from_private(private_connection); |
159 | ||
72b913fb | 160 | if (!connection->upstream_port || !connection->downstream_port) { |
890882ef | 161 | goto error; |
72b913fb PP |
162 | } |
163 | ||
890882ef PP |
164 | upstream_port = connection->upstream_port; |
165 | assert(upstream_port); | |
166 | upstream_component = bt_port_get_component(upstream_port); | |
784cdc68 | 167 | assert(upstream_component); |
890882ef PP |
168 | upstream_comp_class = upstream_component->class; |
169 | ||
170 | if (!upstream_component) { | |
171 | goto error; | |
172 | } | |
173 | ||
174 | upstream_comp_class_type = | |
175 | bt_component_get_class_type(upstream_component); | |
176 | if (upstream_comp_class_type != BT_COMPONENT_CLASS_TYPE_SOURCE && | |
177 | upstream_comp_class_type != BT_COMPONENT_CLASS_TYPE_FILTER) { | |
178 | /* Unsupported operation. */ | |
179 | goto error; | |
180 | } | |
784cdc68 | 181 | |
890882ef PP |
182 | iterator = bt_notification_iterator_create(upstream_component); |
183 | if (!iterator) { | |
184 | goto error; | |
185 | } | |
186 | ||
187 | switch (upstream_comp_class_type) { | |
784cdc68 | 188 | case BT_COMPONENT_CLASS_TYPE_SOURCE: |
890882ef PP |
189 | { |
190 | struct bt_component_class_source *source_class = | |
191 | container_of(upstream_comp_class, | |
192 | struct bt_component_class_source, parent); | |
193 | init_method = source_class->methods.iterator.init; | |
784cdc68 | 194 | break; |
890882ef | 195 | } |
784cdc68 | 196 | case BT_COMPONENT_CLASS_TYPE_FILTER: |
890882ef PP |
197 | { |
198 | struct bt_component_class_filter *filter_class = | |
199 | container_of(upstream_comp_class, | |
200 | struct bt_component_class_filter, parent); | |
201 | init_method = filter_class->methods.iterator.init; | |
784cdc68 | 202 | break; |
890882ef | 203 | } |
784cdc68 | 204 | default: |
890882ef PP |
205 | /* Unreachable. */ |
206 | assert(0); | |
207 | } | |
208 | ||
209 | if (init_method) { | |
210 | enum bt_notification_iterator_status status = init_method( | |
91457551 PP |
211 | bt_private_notification_iterator_from_notification_iterator(iterator), |
212 | bt_private_port_from_port(upstream_port)); | |
890882ef PP |
213 | if (status < 0) { |
214 | goto error; | |
215 | } | |
216 | } | |
217 | ||
218 | ret_iterator = bt_notification_iterator_validate(iterator); | |
219 | if (ret_iterator != BT_NOTIFICATION_ITERATOR_STATUS_OK) { | |
220 | goto error; | |
784cdc68 | 221 | } |
890882ef PP |
222 | |
223 | goto end; | |
224 | ||
225 | error: | |
226 | BT_PUT(iterator); | |
227 | ||
784cdc68 JG |
228 | end: |
229 | bt_put(upstream_component); | |
890882ef | 230 | return iterator; |
784cdc68 | 231 | } |