| 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/component-internal.h> |
| 30 | #include <babeltrace/component/component-source-internal.h> |
| 31 | #include <babeltrace/component/component-filter-internal.h> |
| 32 | #include <babeltrace/component/connection-internal.h> |
| 33 | #include <babeltrace/component/graph-internal.h> |
| 34 | #include <babeltrace/component/port-internal.h> |
| 35 | #include <babeltrace/object-internal.h> |
| 36 | #include <babeltrace/compiler.h> |
| 37 | #include <glib.h> |
| 38 | |
| 39 | static |
| 40 | void bt_connection_destroy(struct bt_object *obj) |
| 41 | { |
| 42 | struct bt_connection *connection = container_of(obj, |
| 43 | struct bt_connection, base); |
| 44 | |
| 45 | /* |
| 46 | * No bt_put on ports as a connection only holds _weak_ references |
| 47 | * to them. |
| 48 | */ |
| 49 | g_free(connection); |
| 50 | } |
| 51 | |
| 52 | BT_HIDDEN |
| 53 | struct bt_connection *bt_connection_create( |
| 54 | struct bt_graph *graph, |
| 55 | struct bt_port *upstream_port, |
| 56 | struct bt_port *downstream_port) |
| 57 | { |
| 58 | struct bt_connection *connection = NULL; |
| 59 | |
| 60 | if (bt_port_get_type(upstream_port) != BT_PORT_TYPE_OUTPUT) { |
| 61 | goto end; |
| 62 | } |
| 63 | if (bt_port_get_type(downstream_port) != BT_PORT_TYPE_INPUT) { |
| 64 | goto end; |
| 65 | } |
| 66 | |
| 67 | connection = g_new0(struct bt_connection, 1); |
| 68 | if (!connection) { |
| 69 | goto end; |
| 70 | } |
| 71 | |
| 72 | bt_object_init(connection, bt_connection_destroy); |
| 73 | /* Weak references are taken, see comment in header. */ |
| 74 | connection->upstream_port = upstream_port; |
| 75 | connection->downstream_port = downstream_port; |
| 76 | bt_port_set_connection(upstream_port, connection); |
| 77 | bt_port_set_connection(downstream_port, connection); |
| 78 | bt_object_set_parent(connection, &graph->base); |
| 79 | end: |
| 80 | return connection; |
| 81 | } |
| 82 | |
| 83 | BT_HIDDEN |
| 84 | void bt_connection_disconnect_ports(struct bt_connection *conn, |
| 85 | struct bt_component *acting_comp) |
| 86 | { |
| 87 | struct bt_component *downstream_comp = NULL; |
| 88 | struct bt_component *upstream_comp = NULL; |
| 89 | struct bt_port *downstream_port = conn->downstream_port; |
| 90 | struct bt_port *upstream_port = conn->upstream_port; |
| 91 | |
| 92 | if (downstream_port) { |
| 93 | downstream_comp = bt_port_get_component(downstream_port); |
| 94 | bt_port_set_connection(downstream_port, NULL); |
| 95 | conn->downstream_port = NULL; |
| 96 | } |
| 97 | |
| 98 | if (upstream_port) { |
| 99 | upstream_comp = bt_port_get_component(upstream_port); |
| 100 | bt_port_set_connection(upstream_port, NULL); |
| 101 | conn->upstream_port = NULL; |
| 102 | } |
| 103 | |
| 104 | if (downstream_comp && downstream_comp != acting_comp && |
| 105 | downstream_comp->class->methods.port_disconnected) { |
| 106 | bt_component_port_disconnected(downstream_comp, |
| 107 | downstream_port); |
| 108 | } |
| 109 | |
| 110 | if (upstream_comp && upstream_comp != acting_comp && |
| 111 | upstream_comp->class->methods.port_disconnected) { |
| 112 | bt_component_port_disconnected(upstream_comp, upstream_port); |
| 113 | } |
| 114 | |
| 115 | // TODO: notify graph user: component's port disconnected |
| 116 | |
| 117 | bt_put(downstream_comp); |
| 118 | bt_put(upstream_comp); |
| 119 | } |
| 120 | |
| 121 | struct bt_port *bt_connection_get_upstream_port( |
| 122 | struct bt_connection *connection) |
| 123 | { |
| 124 | return connection ? bt_get(connection->upstream_port) : NULL; |
| 125 | } |
| 126 | |
| 127 | struct bt_port *bt_connection_get_downstream_port( |
| 128 | struct bt_connection *connection) |
| 129 | { |
| 130 | return connection ? bt_get(connection->downstream_port) : NULL; |
| 131 | } |
| 132 | |
| 133 | struct bt_notification_iterator * |
| 134 | bt_connection_create_notification_iterator(struct bt_connection *connection) |
| 135 | { |
| 136 | struct bt_component *upstream_component = NULL; |
| 137 | struct bt_notification_iterator *it = NULL; |
| 138 | |
| 139 | if (!connection) { |
| 140 | goto end; |
| 141 | } |
| 142 | |
| 143 | if (!connection->upstream_port || !connection->downstream_port) { |
| 144 | goto end; |
| 145 | } |
| 146 | |
| 147 | upstream_component = bt_port_get_component(connection->upstream_port); |
| 148 | assert(upstream_component); |
| 149 | |
| 150 | switch (bt_component_get_class_type(upstream_component)) { |
| 151 | case BT_COMPONENT_CLASS_TYPE_SOURCE: |
| 152 | it = bt_component_source_create_notification_iterator( |
| 153 | upstream_component); |
| 154 | break; |
| 155 | case BT_COMPONENT_CLASS_TYPE_FILTER: |
| 156 | it = bt_component_filter_create_notification_iterator( |
| 157 | upstream_component); |
| 158 | break; |
| 159 | default: |
| 160 | goto end; |
| 161 | } |
| 162 | end: |
| 163 | bt_put(upstream_component); |
| 164 | return it; |
| 165 | } |