lib/graph/component.c

   1 /*
   2  * component.c
   3  *
   4  * Babeltrace Plugin Component
   5  *
   6  * Copyright 2015 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 #define BT_LOG_TAG "COMP"
  30 #include <babeltrace/lib-logging-internal.h>
  31
  32 #include <babeltrace/graph/private-component.h>
  33 #include <babeltrace/graph/component.h>
  34 #include <babeltrace/graph/component-internal.h>
  35 #include <babeltrace/graph/component-class-internal.h>
  36 #include <babeltrace/graph/component-source-internal.h>
  37 #include <babeltrace/graph/component-filter-internal.h>
  38 #include <babeltrace/graph/component-sink-internal.h>
  39 #include <babeltrace/graph/private-connection.h>
  40 #include <babeltrace/graph/connection-internal.h>
  41 #include <babeltrace/graph/graph-internal.h>
  42 #include <babeltrace/graph/notification-iterator-internal.h>
  43 #include <babeltrace/graph/private-notification-iterator.h>
  44 #include <babeltrace/babeltrace-internal.h>
  45 #include <babeltrace/compiler-internal.h>
  46 #include <babeltrace/ref.h>
  47 #include <babeltrace/types.h>
  48 #include <babeltrace/values.h>
  49 #include <babeltrace/values-internal.h>
  50 #include <stdint.h>
  51 #include <inttypes.h>
  52
  53 static
  54 struct bt_component * (* const component_create_funcs[])(
  55                 struct bt_component_class *, struct bt_value *) = {
  56         [BT_COMPONENT_CLASS_TYPE_SOURCE] = bt_component_source_create,
  57         [BT_COMPONENT_CLASS_TYPE_SINK] = bt_component_sink_create,
  58         [BT_COMPONENT_CLASS_TYPE_FILTER] = bt_component_filter_create,
  59 };
  60
  61 static
  62 void (*component_destroy_funcs[])(struct bt_component *) = {
  63         [BT_COMPONENT_CLASS_TYPE_SOURCE] = bt_component_source_destroy,
  64         [BT_COMPONENT_CLASS_TYPE_SINK] = bt_component_sink_destroy,
  65         [BT_COMPONENT_CLASS_TYPE_FILTER] = bt_component_filter_destroy,
  66 };
  67
  68 static
  69 enum bt_component_status (* const component_validation_funcs[])(
  70                 struct bt_component *) = {
  71         [BT_COMPONENT_CLASS_TYPE_SOURCE] = bt_component_source_validate,
  72         [BT_COMPONENT_CLASS_TYPE_SINK] = bt_component_sink_validate,
  73         [BT_COMPONENT_CLASS_TYPE_FILTER] = bt_component_filter_validate,
  74 };
  75
  76 static
  77 void bt_component_destroy(struct bt_object *obj)
  78 {
  79         struct bt_component *component = NULL;
  80         struct bt_component_class *component_class = NULL;
  81         int i;
  82
  83         if (!obj) {
  84                 return;
  85         }
  86
  87         /*
  88          * The component's reference count is 0 if we're here. Increment
  89          * it to avoid a double-destroy (possibly infinitely recursive).
  90          * This could happen for example if the component's finalization
  91          * function does bt_get() (or anything that causes bt_get() to
  92          * be called) on itself (ref. count goes from 0 to 1), and then
  93          * bt_put(): the reference count would go from 1 to 0 again and
  94          * this function would be called again.
  95          */
  96         obj->ref_count.count++;
  97         component = container_of(obj, struct bt_component, base);
  98         BT_LOGD("Destroying component: addr=%p, name=\"%s\", graph-addr=%p",
  99                 component, bt_component_get_name(component),
 100                 obj->parent);
 101
 102         /* Call destroy listeners in reverse registration order */
 103         BT_LOGD_STR("Calling destroy listeners.");
 104
 105         for (i = component->destroy_listeners->len - 1; i >= 0; i--) {
 106                 struct bt_component_destroy_listener *listener =
 107                         &g_array_index(component->destroy_listeners,
 108                                 struct bt_component_destroy_listener, i);
 109
 110                 listener->func(component, listener->data);
 111         }
 112
 113         component_class = component->class;
 114
 115         /*
 116          * User data is destroyed first, followed by the concrete component
 117          * instance.
 118          */
 119         if (component->class->methods.finalize) {
 120                 BT_LOGD_STR("Calling user's finalization method.");
 121                 component->class->methods.finalize(
 122                         bt_private_component_from_component(component));
 123         }
 124
 125         if (component->destroy) {
 126                 BT_LOGD_STR("Destroying type-specific data.");
 127                 component->destroy(component);
 128         }
 129
 130         if (component->input_ports) {
 131                 BT_LOGD_STR("Destroying input ports.");
 132                 g_ptr_array_free(component->input_ports, TRUE);
 133         }
 134
 135         if (component->output_ports) {
 136                 BT_LOGD_STR("Destroying output ports.");
 137                 g_ptr_array_free(component->output_ports, TRUE);
 138         }
 139
 140         if (component->destroy_listeners) {
 141                 g_array_free(component->destroy_listeners, TRUE);
 142         }
 143
 144         if (component->name) {
 145                 g_string_free(component->name, TRUE);
 146         }
 147
 148         BT_LOGD("Putting component class.");
 149         bt_put(component_class);
 150         g_free(component);
 151 }
 152
 153 struct bt_component *bt_component_from_private_component(
 154                 struct bt_private_component *private_component)
 155 {
 156         return bt_get(bt_component_from_private(private_component));
 157 }
 158
 159 enum bt_component_class_type bt_component_get_class_type(
 160                 struct bt_component *component)
 161 {
 162         return component ? component->class->type : BT_COMPONENT_CLASS_TYPE_UNKNOWN;
 163 }
 164
 165 static
 166 struct bt_port *bt_component_add_port(
 167                 struct bt_component *component, GPtrArray *ports,
 168                 enum bt_port_type port_type, const char *name, void *user_data)
 169 {
 170         size_t i;
 171         struct bt_port *new_port = NULL;
 172         struct bt_graph *graph = NULL;
 173
 174         if (!name) {
 175                 BT_LOGW_STR("Invalid parameter: name is NULL.");
 176                 goto end;
 177         }
 178
 179         if (strlen(name) == 0) {
 180                 BT_LOGW_STR("Invalid parameter: name is an empty string.");
 181                 goto end;
 182         }
 183
 184         BT_LOGD("Adding port to component: comp-addr=%p, comp-name=\"%s\", "
 185                 "port-type=%s, port-name=\"%s\"", component,
 186                 bt_component_get_name(component),
 187                 bt_port_type_string(port_type), name);
 188
 189         /* Look for a port having the same name. */
 190         for (i = 0; i < ports->len; i++) {
 191                 const char *port_name;
 192                 struct bt_port *port = g_ptr_array_index(ports, i);
 193
 194                 port_name = bt_port_get_name(port);
 195                 assert(port_name);
 196
 197                 if (!strcmp(name, port_name)) {
 198                         /* Port name clash, abort. */
 199                         BT_LOGW("Invalid parameter: another port with the same name already exists in the component: "
 200                                 "other-port-addr=%p", port);
 201                         goto end;
 202                 }
 203         }
 204
 205         new_port = bt_port_create(component, port_type, name, user_data);
 206         if (!new_port) {
 207                 BT_LOGE("Cannot create port object.");
 208                 goto end;
 209         }
 210
 211         /*
 212          * No name clash, add the port.
 213          * The component is now the port's parent; it should _not_
 214          * hold a reference to the port since the port's lifetime
 215          * is now protected by the component's own lifetime.
 216          */
 217         g_ptr_array_add(ports, new_port);
 218
 219         /*
 220          * Notify the graph's creator that a new port was added.
 221          */
 222         graph = bt_component_get_graph(component);
 223         if (graph) {
 224                 bt_graph_notify_port_added(graph, new_port);
 225                 BT_PUT(graph);
 226         }
 227
 228         BT_LOGD("Created and added port to component: comp-addr=%p, comp-name=\"%s\", "
 229                 "port-type=%s, port-name=\"%s\", port-addr=%p", component,
 230                 bt_component_get_name(component),
 231                 bt_port_type_string(port_type), name, new_port);
 232
 233 end:
 234         return new_port;
 235 }
 236
 237 BT_HIDDEN
 238 int64_t bt_component_get_input_port_count(struct bt_component *comp)
 239 {
 240         assert(comp);
 241         return (int64_t) comp->input_ports->len;
 242 }
 243
 244 BT_HIDDEN
 245 int64_t bt_component_get_output_port_count(struct bt_component *comp)
 246 {
 247         assert(comp);
 248         return (int64_t) comp->output_ports->len;
 249 }
 250
 251 struct bt_component *bt_component_create_with_init_method_data(
 252                 struct bt_component_class *component_class, const char *name,
 253                 struct bt_value *params, void *init_method_data)
 254 {
 255         int ret;
 256         struct bt_component *component = NULL;
 257         enum bt_component_class_type type;
 258
 259         bt_get(params);
 260
 261         if (!component_class) {
 262                 BT_LOGW_STR("Invalid parameter: component class is NULL.");
 263                 goto end;
 264         }
 265
 266         type = bt_component_class_get_type(component_class);
 267         if (type <= BT_COMPONENT_CLASS_TYPE_UNKNOWN ||
 268                         type > BT_COMPONENT_CLASS_TYPE_FILTER) {
 269                 BT_LOGW("Invalid parameter: unknown component class type: "
 270                         "type=%s", bt_component_class_type_string(type));
 271                 goto end;
 272         }
 273
 274         BT_LOGD("Creating component from component class: "
 275                 "comp-cls-addr=%p, comp-cls-type=%s, name=\"%s\", "
 276                 "params-addr=%p, init-method-data-addr=%p",
 277                 component_class, bt_component_class_type_string(type),
 278                 name, params, init_method_data);
 279
 280         /*
 281          * Parameters must be a map value, but we create a convenient
 282          * empty one if it's NULL.
 283          */
 284         if (params) {
 285                 if (!bt_value_is_map(params)) {
 286                         BT_LOGW("Invalid parameter: initialization parameters must be a map value: "
 287                                 "type=%s",
 288                                 bt_value_type_string(bt_value_get_type(params)));
 289                         goto end;
 290                 }
 291         } else {
 292                 params = bt_value_map_create();
 293                 if (!params) {
 294                         BT_LOGE_STR("Cannot create map value object.");
 295                         goto end;
 296                 }
 297         }
 298
 299         component = component_create_funcs[type](component_class, params);
 300         if (!component) {
 301                 BT_LOGE_STR("Cannot create specific component object.");
 302                 goto end;
 303         }
 304
 305         bt_object_init(component, bt_component_destroy);
 306         component->class = bt_get(component_class);
 307         component->destroy = component_destroy_funcs[type];
 308         component->name = g_string_new(name);
 309         if (!component->name) {
 310                 BT_LOGE_STR("Failed to allocate one GString.");
 311                 BT_PUT(component);
 312                 goto end;
 313         }
 314
 315         component->input_ports = g_ptr_array_new_with_free_func(
 316                 bt_object_release);
 317         if (!component->input_ports) {
 318                 BT_LOGE_STR("Failed to allocate one GPtrArray.");
 319                 BT_PUT(component);
 320                 goto end;
 321         }
 322
 323         component->output_ports = g_ptr_array_new_with_free_func(
 324                 bt_object_release);
 325         if (!component->output_ports) {
 326                 BT_LOGE_STR("Failed to allocate one GPtrArray.");
 327                 BT_PUT(component);
 328                 goto end;
 329         }
 330
 331         component->destroy_listeners = g_array_new(FALSE, TRUE,
 332                 sizeof(struct bt_component_destroy_listener));
 333         if (!component->destroy_listeners) {
 334                 BT_LOGE_STR("Failed to allocate one GArray.");
 335                 BT_PUT(component);
 336                 goto end;
 337         }
 338
 339         if (component_class->methods.init) {
 340                 BT_LOGD_STR("Calling user's initialization method.");
 341                 ret = component_class->methods.init(
 342                         bt_private_component_from_component(component), params,
 343                         init_method_data);
 344                 BT_LOGD("User method returned: status=%s",
 345                         bt_component_status_string(ret));
 346                 if (ret != BT_COMPONENT_STATUS_OK) {
 347                         BT_LOGW_STR("Initialization method failed.");
 348                         BT_PUT(component);
 349                         goto end;
 350                 }
 351         }
 352
 353         ret = component_validation_funcs[type](component);
 354         if (ret != BT_COMPONENT_STATUS_OK) {
 355                 BT_LOGW("Component is invalid: status=%s",
 356                         bt_component_status_string(ret));
 357                 BT_PUT(component);
 358                 goto end;
 359         }
 360
 361         BT_LOGD_STR("Freezing component class.");
 362         bt_component_class_freeze(component->class);
 363         BT_LOGD("Created component from component class: "
 364                 "comp-cls-addr=%p, comp-cls-type=%s, name=\"%s\", "
 365                 "params-addr=%p, init-method-data-addr=%p, comp-addr=%p",
 366                 component_class, bt_component_class_type_string(type),
 367                 name, params, init_method_data, component);
 368
 369 end:
 370         bt_put(params);
 371         return component;
 372 }
 373
 374 struct bt_component *bt_component_create(
 375                 struct bt_component_class *component_class, const char *name,
 376                 struct bt_value *params)
 377 {
 378         /* bt_component_create_with_init_method_data() logs details */
 379         return bt_component_create_with_init_method_data(component_class, name,
 380                 params, NULL);
 381 }
 382
 383 const char *bt_component_get_name(struct bt_component *component)
 384 {
 385         const char *ret = NULL;
 386
 387         if (!component) {
 388                 BT_LOGW_STR("Invalid parameter: component is NULL.");
 389                 goto end;
 390         }
 391
 392         ret = component->name->len == 0 ? NULL : component->name->str;
 393
 394 end:
 395         return ret;
 396 }
 397
 398 struct bt_component_class *bt_component_get_class(
 399                 struct bt_component *component)
 400 {
 401         return component ? bt_get(component->class) : NULL;
 402 }
 403
 404 void *bt_private_component_get_user_data(
 405                 struct bt_private_component *private_component)
 406 {
 407         struct bt_component *component =
 408                 bt_component_from_private(private_component);
 409
 410         return component ? component->user_data : NULL;
 411 }
 412
 413 enum bt_component_status bt_private_component_set_user_data(
 414                 struct bt_private_component *private_component,
 415                 void *data)
 416 {
 417         struct bt_component *component =
 418                 bt_component_from_private(private_component);
 419         enum bt_component_status ret = BT_COMPONENT_STATUS_OK;
 420
 421         if (!component) {
 422                 BT_LOGW_STR("Invalid parameter: component is NULL.");
 423                 ret = BT_COMPONENT_STATUS_INVALID;
 424                 goto end;
 425         }
 426
 427         component->user_data = data;
 428         BT_LOGV("Set component's user data: "
 429                 "comp-addr=%p, comp-name=\"%s\", user-data-addr=%p",
 430                 component, bt_component_get_name(component), data);
 431
 432 end:
 433         return ret;
 434 }
 435
 436 BT_HIDDEN
 437 void bt_component_set_graph(struct bt_component *component,
 438                 struct bt_graph *graph)
 439 {
 440         struct bt_object *parent = bt_object_get_parent(&component->base);
 441
 442         assert(!parent || parent == &graph->base);
 443         if (!parent) {
 444                 bt_object_set_parent(component, &graph->base);
 445         }
 446         bt_put(parent);
 447 }
 448
 449 struct bt_graph *bt_component_get_graph(
 450                 struct bt_component *component)
 451 {
 452         return (struct bt_graph *) bt_object_get_parent(&component->base);
 453 }
 454
 455 static
 456 struct bt_port *bt_component_get_port_by_name(GPtrArray *ports,
 457                 const char *name)
 458 {
 459         size_t i;
 460         struct bt_port *ret_port = NULL;
 461
 462         assert(name);
 463
 464         for (i = 0; i < ports->len; i++) {
 465                 struct bt_port *port = g_ptr_array_index(ports, i);
 466                 const char *port_name = bt_port_get_name(port);
 467
 468                 if (!port_name) {
 469                         continue;
 470                 }
 471
 472                 if (!strcmp(name, port_name)) {
 473                         ret_port = bt_get(port);
 474                         break;
 475                 }
 476         }
 477
 478         return ret_port;
 479 }
 480
 481 BT_HIDDEN
 482 struct bt_port *bt_component_get_input_port_by_name(struct bt_component *comp,
 483                 const char *name)
 484 {
 485         assert(comp);
 486
 487         return bt_component_get_port_by_name(comp->input_ports, name);
 488 }
 489
 490 BT_HIDDEN
 491 struct bt_port *bt_component_get_output_port_by_name(struct bt_component *comp,
 492                 const char *name)
 493 {
 494         assert(comp);
 495
 496         return bt_component_get_port_by_name(comp->output_ports, name);
 497 }
 498
 499 static
 500 struct bt_port *bt_component_get_port_by_index(GPtrArray *ports, uint64_t index)
 501 {
 502         struct bt_port *port = NULL;
 503
 504         if (index >= ports->len) {
 505                 BT_LOGW("Invalid parameter: index is out of bounds: "
 506                         "index=%" PRIu64 ", count=%u",
 507                         index, ports->len);
 508                 goto end;
 509         }
 510
 511         port = bt_get(g_ptr_array_index(ports, index));
 512 end:
 513         return port;
 514 }
 515
 516 BT_HIDDEN
 517 struct bt_port *bt_component_get_input_port_by_index(struct bt_component *comp,
 518                 uint64_t index)
 519 {
 520         assert(comp);
 521
 522         return bt_component_get_port_by_index(comp->input_ports, index);
 523 }
 524
 525 BT_HIDDEN
 526 struct bt_port *bt_component_get_output_port_by_index(struct bt_component *comp,
 527                 uint64_t index)
 528 {
 529         assert(comp);
 530
 531         return bt_component_get_port_by_index(comp->output_ports, index);
 532 }
 533
 534 BT_HIDDEN
 535 struct bt_port *bt_component_add_input_port(
 536                 struct bt_component *component, const char *name,
 537                 void *user_data)
 538 {
 539         /* bt_component_add_port() logs details */
 540         return bt_component_add_port(component, component->input_ports,
 541                 BT_PORT_TYPE_INPUT, name, user_data);
 542 }
 543
 544 BT_HIDDEN
 545 struct bt_port *bt_component_add_output_port(
 546                 struct bt_component *component, const char *name,
 547                 void *user_data)
 548 {
 549         /* bt_component_add_port() logs details */
 550         return bt_component_add_port(component, component->output_ports,
 551                 BT_PORT_TYPE_OUTPUT, name, user_data);
 552 }
 553
 554 static
 555 void bt_component_remove_port_by_index(struct bt_component *component,
 556                 GPtrArray *ports, size_t index)
 557 {
 558         struct bt_port *port;
 559         struct bt_graph *graph;
 560
 561         assert(ports);
 562         assert(index < ports->len);
 563         port = g_ptr_array_index(ports, index);
 564
 565         BT_LOGD("Removing port from component: "
 566                 "comp-addr=%p, comp-name=\"%s\", "
 567                 "port-addr=%p, port-name=\"%s\"",
 568                 component, bt_component_get_name(component),
 569                 port, bt_port_get_name(port));
 570
 571         /* Disconnect both ports of this port's connection, if any */
 572         if (port->connection) {
 573                 bt_connection_disconnect_ports(port->connection);
 574         }
 575
 576         /* Remove from parent's array of ports (weak refs) */
 577         g_ptr_array_remove_index(ports, index);
 578
 579         /* Detach port from its component parent */
 580         BT_PUT(port->base.parent);
 581
 582         /*
 583          * Notify the graph's creator that a port is removed.
 584          */
 585         graph = bt_component_get_graph(component);
 586         if (graph) {
 587                 bt_graph_notify_port_removed(graph, component, port);
 588                 BT_PUT(graph);
 589         }
 590
 591         BT_LOGD("Removed port from component: "
 592                 "comp-addr=%p, comp-name=\"%s\", "
 593                 "port-addr=%p, port-name=\"%s\"",
 594                 component, bt_component_get_name(component),
 595                 port, bt_port_get_name(port));
 596 }
 597
 598 BT_HIDDEN
 599 enum bt_component_status bt_component_remove_port(
 600                 struct bt_component *component, struct bt_port *port)
 601 {
 602         size_t i;
 603         enum bt_component_status status = BT_COMPONENT_STATUS_OK;
 604         GPtrArray *ports = NULL;
 605
 606         if (!component) {
 607                 BT_LOGW_STR("Invalid parameter: component is NULL.");
 608                 status = BT_COMPONENT_STATUS_INVALID;
 609                 goto end;
 610         }
 611
 612         if (!port) {
 613                 BT_LOGW_STR("Invalid parameter: port is NULL.");
 614                 status = BT_COMPONENT_STATUS_INVALID;
 615                 goto end;
 616         }
 617
 618         if (bt_port_get_type(port) == BT_PORT_TYPE_INPUT) {
 619                 ports = component->input_ports;
 620         } else if (bt_port_get_type(port) == BT_PORT_TYPE_OUTPUT) {
 621                 ports = component->output_ports;
 622         }
 623
 624         assert(ports);
 625
 626         for (i = 0; i < ports->len; i++) {
 627                 struct bt_port *cur_port = g_ptr_array_index(ports, i);
 628
 629                 if (cur_port == port) {
 630                         bt_component_remove_port_by_index(component,
 631                                 ports, i);
 632                         goto end;
 633                 }
 634         }
 635
 636         status = BT_COMPONENT_STATUS_NOT_FOUND;
 637         BT_LOGW("Port to remove from component was not found: "
 638                 "comp-addr=%p, comp-name=\"%s\", "
 639                 "port-addr=%p, port-name=\"%s\"",
 640                 component, bt_component_get_name(component),
 641                 port, bt_port_get_name(port));
 642
 643 end:
 644         return status;
 645 }
 646
 647 BT_HIDDEN
 648 enum bt_component_status bt_component_accept_port_connection(
 649                 struct bt_component *comp, struct bt_port *self_port,
 650                 struct bt_port *other_port)
 651 {
 652         enum bt_component_status status = BT_COMPONENT_STATUS_OK;
 653
 654         assert(comp);
 655         assert(self_port);
 656         assert(other_port);
 657
 658         if (comp->class->methods.accept_port_connection) {
 659                 BT_LOGD("Calling user's \"accept port connection\" method: "
 660                         "comp-addr=%p, comp-name=\"%s\", "
 661                         "self-port-addr=%p, self-port-name=\"%s\", "
 662                         "other-port-addr=%p, other-port-name=\"%s\"",
 663                         comp, bt_component_get_name(comp),
 664                         self_port, bt_port_get_name(self_port),
 665                         other_port, bt_port_get_name(other_port));
 666                 status = comp->class->methods.accept_port_connection(
 667                         bt_private_component_from_component(comp),
 668                         bt_private_port_from_port(self_port),
 669                         other_port);
 670                 BT_LOGD("User method returned: status=%s",
 671                         bt_component_status_string(status));
 672         }
 673
 674         return status;
 675 }
 676
 677 BT_HIDDEN
 678 void bt_component_port_connected(struct bt_component *comp,
 679                 struct bt_port *self_port, struct bt_port *other_port)
 680 {
 681         assert(comp);
 682         assert(self_port);
 683         assert(other_port);
 684
 685         if (comp->class->methods.port_connected) {
 686                 BT_LOGD("Calling user's \"port connected\" method: "
 687                         "comp-addr=%p, comp-name=\"%s\", "
 688                         "self-port-addr=%p, self-port-name=\"%s\", "
 689                         "other-port-addr=%p, other-port-name=\"%s\"",
 690                         comp, bt_component_get_name(comp),
 691                         self_port, bt_port_get_name(self_port),
 692                         other_port, bt_port_get_name(other_port));
 693                 comp->class->methods.port_connected(
 694                         bt_private_component_from_component(comp),
 695                         bt_private_port_from_port(self_port), other_port);
 696         }
 697 }
 698
 699 BT_HIDDEN
 700 void bt_component_port_disconnected(struct bt_component *comp,
 701                 struct bt_port *port)
 702 {
 703         assert(comp);
 704         assert(port);
 705
 706         if (comp->class->methods.port_disconnected) {
 707                 BT_LOGD("Calling user's \"port disconnected\" method: "
 708                         "comp-addr=%p, comp-name=\"%s\", "
 709                         "port-addr=%p, port-name=\"%s\"",
 710                         comp, bt_component_get_name(comp),
 711                         port, bt_port_get_name(port));
 712                 comp->class->methods.port_disconnected(
 713                         bt_private_component_from_component(comp),
 714                         bt_private_port_from_port(port));
 715         }
 716 }
 717
 718 BT_HIDDEN
 719 void bt_component_add_destroy_listener(struct bt_component *component,
 720                 bt_component_destroy_listener_func func, void *data)
 721 {
 722         struct bt_component_destroy_listener listener;
 723
 724         assert(component);
 725         assert(func);
 726         listener.func = func;
 727         listener.data = data;
 728         g_array_append_val(component->destroy_listeners, listener);
 729         BT_LOGV("Added destroy listener: "
 730                 "comp-addr=%p, comp-name=\"%s\", "
 731                 "func-addr=%p, data-addr=%p",
 732                 component, bt_component_get_name(component),
 733                 func, data);
 734 }
 735
 736 BT_HIDDEN
 737 void bt_component_remove_destroy_listener(struct bt_component *component,
 738                 bt_component_destroy_listener_func func, void *data)
 739 {
 740         size_t i;
 741
 742         assert(component);
 743         assert(func);
 744
 745         for (i = 0; i < component->destroy_listeners->len; i++) {
 746                 struct bt_component_destroy_listener *listener =
 747                         &g_array_index(component->destroy_listeners,
 748                                 struct bt_component_destroy_listener, i);
 749
 750                 if (listener->func == func && listener->data == data) {
 751                         g_array_remove_index(component->destroy_listeners, i);
 752                         i--;
 753                         BT_LOGV("Removed destroy listener: "
 754                                 "comp-addr=%p, comp-name=\"%s\", "
 755                                 "func-addr=%p, data-addr=%p",
 756                                 component, bt_component_get_name(component),
 757                                 func, data);
 758                 }
 759         }
 760 }