| 1 | /* |
| 2 | * 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/notification/iterator-internal.h> |
| 30 | #include <babeltrace/component/component-internal.h> |
| 31 | #include <babeltrace/component/component-source-internal.h> |
| 32 | #include <babeltrace/component/component-filter-internal.h> |
| 33 | #include <babeltrace/component/connection-internal.h> |
| 34 | #include <babeltrace/component/private-connection.h> |
| 35 | #include <babeltrace/component/graph-internal.h> |
| 36 | #include <babeltrace/component/port-internal.h> |
| 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 | |
| 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 | |
| 60 | BT_HIDDEN |
| 61 | struct bt_connection *bt_connection_create( |
| 62 | struct bt_graph *graph, |
| 63 | struct bt_port *upstream_port, |
| 64 | struct bt_port *downstream_port) |
| 65 | { |
| 66 | struct bt_connection *connection = NULL; |
| 67 | |
| 68 | if (bt_port_get_type(upstream_port) != BT_PORT_TYPE_OUTPUT) { |
| 69 | goto end; |
| 70 | } |
| 71 | if (bt_port_get_type(downstream_port) != BT_PORT_TYPE_INPUT) { |
| 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. */ |
| 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); |
| 86 | bt_object_set_parent(connection, &graph->base); |
| 87 | end: |
| 88 | return connection; |
| 89 | } |
| 90 | |
| 91 | BT_HIDDEN |
| 92 | void bt_connection_disconnect_ports(struct bt_connection *conn, |
| 93 | struct bt_component *acting_comp) |
| 94 | { |
| 95 | struct bt_component *downstream_comp = NULL; |
| 96 | struct bt_component *upstream_comp = NULL; |
| 97 | struct bt_port *downstream_port = conn->downstream_port; |
| 98 | struct bt_port *upstream_port = conn->upstream_port; |
| 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 | |
| 112 | if (downstream_comp && downstream_comp != acting_comp) { |
| 113 | bt_component_port_disconnected(downstream_comp, |
| 114 | downstream_port); |
| 115 | } |
| 116 | |
| 117 | if (upstream_comp && upstream_comp != acting_comp) { |
| 118 | bt_component_port_disconnected(upstream_comp, upstream_port); |
| 119 | } |
| 120 | |
| 121 | if (upstream_comp) { |
| 122 | struct bt_graph *graph = bt_component_get_graph(upstream_comp); |
| 123 | |
| 124 | assert(graph); |
| 125 | bt_graph_notify_port_disconnected(graph, upstream_comp, |
| 126 | upstream_port); |
| 127 | bt_put(graph); |
| 128 | } |
| 129 | |
| 130 | if (downstream_comp) { |
| 131 | struct bt_graph *graph = |
| 132 | bt_component_get_graph(downstream_comp); |
| 133 | |
| 134 | assert(graph); |
| 135 | bt_graph_notify_port_disconnected(graph, downstream_comp, |
| 136 | downstream_port); |
| 137 | bt_put(graph); |
| 138 | } |
| 139 | |
| 140 | bt_put(downstream_comp); |
| 141 | bt_put(upstream_comp); |
| 142 | } |
| 143 | |
| 144 | struct bt_port *bt_connection_get_upstream_port( |
| 145 | struct bt_connection *connection) |
| 146 | { |
| 147 | return connection ? bt_get(connection->upstream_port) : NULL; |
| 148 | } |
| 149 | |
| 150 | struct bt_port *bt_connection_get_downstream_port( |
| 151 | struct bt_connection *connection) |
| 152 | { |
| 153 | return connection ? bt_get(connection->downstream_port) : NULL; |
| 154 | } |
| 155 | |
| 156 | struct bt_notification_iterator * |
| 157 | bt_private_connection_create_notification_iterator( |
| 158 | struct bt_private_connection *private_connection) |
| 159 | { |
| 160 | enum bt_notification_iterator_status ret_iterator; |
| 161 | enum bt_component_class_type upstream_comp_class_type; |
| 162 | struct bt_notification_iterator *iterator = NULL; |
| 163 | struct bt_port *upstream_port = NULL; |
| 164 | struct bt_component *upstream_component = NULL; |
| 165 | struct bt_component_class *upstream_comp_class = NULL; |
| 166 | struct bt_connection *connection = NULL; |
| 167 | bt_component_class_notification_iterator_init_method init_method = NULL; |
| 168 | |
| 169 | if (!private_connection) { |
| 170 | goto error; |
| 171 | } |
| 172 | |
| 173 | connection = bt_connection_from_private(private_connection); |
| 174 | |
| 175 | if (!connection->upstream_port || !connection->downstream_port) { |
| 176 | goto error; |
| 177 | } |
| 178 | |
| 179 | upstream_port = connection->upstream_port; |
| 180 | assert(upstream_port); |
| 181 | upstream_component = bt_port_get_component(upstream_port); |
| 182 | assert(upstream_component); |
| 183 | upstream_comp_class = upstream_component->class; |
| 184 | |
| 185 | if (!upstream_component) { |
| 186 | goto error; |
| 187 | } |
| 188 | |
| 189 | upstream_comp_class_type = |
| 190 | bt_component_get_class_type(upstream_component); |
| 191 | if (upstream_comp_class_type != BT_COMPONENT_CLASS_TYPE_SOURCE && |
| 192 | upstream_comp_class_type != BT_COMPONENT_CLASS_TYPE_FILTER) { |
| 193 | /* Unsupported operation. */ |
| 194 | goto error; |
| 195 | } |
| 196 | |
| 197 | iterator = bt_notification_iterator_create(upstream_component); |
| 198 | if (!iterator) { |
| 199 | goto error; |
| 200 | } |
| 201 | |
| 202 | switch (upstream_comp_class_type) { |
| 203 | case BT_COMPONENT_CLASS_TYPE_SOURCE: |
| 204 | { |
| 205 | struct bt_component_class_source *source_class = |
| 206 | container_of(upstream_comp_class, |
| 207 | struct bt_component_class_source, parent); |
| 208 | init_method = source_class->methods.iterator.init; |
| 209 | break; |
| 210 | } |
| 211 | case BT_COMPONENT_CLASS_TYPE_FILTER: |
| 212 | { |
| 213 | struct bt_component_class_filter *filter_class = |
| 214 | container_of(upstream_comp_class, |
| 215 | struct bt_component_class_filter, parent); |
| 216 | init_method = filter_class->methods.iterator.init; |
| 217 | break; |
| 218 | } |
| 219 | default: |
| 220 | /* Unreachable. */ |
| 221 | assert(0); |
| 222 | } |
| 223 | |
| 224 | if (init_method) { |
| 225 | enum bt_notification_iterator_status status = init_method( |
| 226 | bt_private_notification_iterator_from_notification_iterator(iterator), |
| 227 | bt_private_port_from_port(upstream_port)); |
| 228 | if (status < 0) { |
| 229 | goto error; |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | ret_iterator = bt_notification_iterator_validate(iterator); |
| 234 | if (ret_iterator != BT_NOTIFICATION_ITERATOR_STATUS_OK) { |
| 235 | goto error; |
| 236 | } |
| 237 | |
| 238 | goto end; |
| 239 | |
| 240 | error: |
| 241 | BT_PUT(iterator); |
| 242 | |
| 243 | end: |
| 244 | bt_put(upstream_component); |
| 245 | return iterator; |
| 246 | } |