src/lib/graph/component.c

   1 /*
   2  * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
   3  * Copyright 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to deal
   7  * in the Software without restriction, including without limitation the rights
   8  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9  * copies of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  */
  23
  24 #define BT_LOG_TAG "LIB/COMPONENT"
  25 #include "lib/logging.h"
  26
  27 #include "common/common.h"
  28 #include "common/assert.h"
  29 #include "lib/assert-pre.h"
  30 #include <babeltrace2/graph/self-component.h>
  31 #include <babeltrace2/graph/component-const.h>
  32 #include <babeltrace2/graph/component-source-const.h>
  33 #include <babeltrace2/graph/component-filter-const.h>
  34 #include <babeltrace2/graph/component-sink-const.h>
  35 #include "common/macros.h"
  36 #include "compat/compiler.h"
  37 #include <babeltrace2/types.h>
  38 #include <babeltrace2/value.h>
  39 #include "lib/value.h"
  40 #include <stdint.h>
  41 #include <inttypes.h>
  42
  43 #include "component.h"
  44 #include "component-class.h"
  45 #include "component-source.h"
  46 #include "component-filter.h"
  47 #include "component-sink.h"
  48 #include "connection.h"
  49 #include "graph.h"
  50 #include "message/iterator.h"
  51 #include "port.h"
  52
  53 static
  54 struct bt_component * (* const component_create_funcs[])(
  55                 const struct bt_component_class *) = {
  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 void finalize_component(struct bt_component *comp)
  70 {
  71         typedef void (*method_t)(void *);
  72
  73         method_t method = NULL;
  74
  75         BT_ASSERT(comp);
  76
  77         switch (comp->class->type) {
  78         case BT_COMPONENT_CLASS_TYPE_SOURCE:
  79         {
  80                 struct bt_component_class_source *src_cc = (void *) comp->class;
  81
  82                 method = (method_t) src_cc->methods.finalize;
  83                 break;
  84         }
  85         case BT_COMPONENT_CLASS_TYPE_FILTER:
  86         {
  87                 struct bt_component_class_filter *flt_cc = (void *) comp->class;
  88
  89                 method = (method_t) flt_cc->methods.finalize;
  90                 break;
  91         }
  92         case BT_COMPONENT_CLASS_TYPE_SINK:
  93         {
  94                 struct bt_component_class_sink *sink_cc = (void *) comp->class;
  95
  96                 method = (method_t) sink_cc->methods.finalize;
  97                 break;
  98         }
  99         default:
 100                 abort();
 101         }
 102
 103         if (method) {
 104                 BT_LIB_LOGI("Calling user's component finalization method: "
 105                         "%![comp-]+c", comp);
 106                 method(comp);
 107         }
 108 }
 109
 110 static
 111 void destroy_component(struct bt_object *obj)
 112 {
 113         struct bt_component *component = NULL;
 114         int i;
 115
 116         if (!obj) {
 117                 return;
 118         }
 119
 120         /*
 121          * The component's reference count is 0 if we're here. Increment
 122          * it to avoid a double-destroy (possibly infinitely recursive).
 123          * This could happen for example if the component's finalization
 124          * function does bt_object_get_ref() (or anything that causes
 125          * bt_object_get_ref() to be called) on itself (ref. count goes
 126          * from 0 to 1), and then bt_object_put_ref(): the reference
 127          * count would go from 1 to 0 again and this function would be
 128          * called again.
 129          */
 130         obj->ref_count++;
 131         component = container_of(obj, struct bt_component, base);
 132         BT_LIB_LOGI("Destroying component: %![comp-]+c, %![graph-]+g",
 133                 component, bt_component_borrow_graph(component));
 134
 135         /* Call destroy listeners in reverse registration order */
 136         BT_LOGD_STR("Calling destroy listeners.");
 137
 138         for (i = component->destroy_listeners->len - 1; i >= 0; i--) {
 139                 struct bt_component_destroy_listener *listener =
 140                         &g_array_index(component->destroy_listeners,
 141                                 struct bt_component_destroy_listener, i);
 142
 143                 listener->func(component, listener->data);
 144         }
 145
 146         /*
 147          * User data is destroyed first, followed by the concrete
 148          * component instance. Do not finalize if the component's user
 149          * initialization method failed in the first place.
 150          */
 151         if (component->initialized) {
 152                 finalize_component(component);
 153         }
 154
 155         if (component->destroy) {
 156                 BT_LOGD_STR("Destroying type-specific data.");
 157                 component->destroy(component);
 158         }
 159
 160         if (component->input_ports) {
 161                 BT_LOGD_STR("Destroying input ports.");
 162                 g_ptr_array_free(component->input_ports, TRUE);
 163                 component->input_ports = NULL;
 164         }
 165
 166         if (component->output_ports) {
 167                 BT_LOGD_STR("Destroying output ports.");
 168                 g_ptr_array_free(component->output_ports, TRUE);
 169                 component->output_ports = NULL;
 170         }
 171
 172         if (component->destroy_listeners) {
 173                 g_array_free(component->destroy_listeners, TRUE);
 174                 component->destroy_listeners = NULL;
 175         }
 176
 177         if (component->name) {
 178                 g_string_free(component->name, TRUE);
 179                 component->name = NULL;
 180         }
 181
 182         BT_LOGD_STR("Putting component class.");
 183         BT_OBJECT_PUT_REF_AND_RESET(component->class);
 184         g_free(component);
 185 }
 186
 187 enum bt_component_class_type bt_component_get_class_type(
 188                 const struct bt_component *component)
 189 {
 190         BT_ASSERT_PRE_NON_NULL(component, "Component");
 191         return component->class->type;
 192 }
 193
 194 static
 195 enum bt_self_component_status add_port(
 196                 struct bt_component *component, GPtrArray *ports,
 197                 enum bt_port_type port_type, const char *name, void *user_data,
 198                 struct bt_port **port)
 199 {
 200         struct bt_port *new_port = NULL;
 201         struct bt_graph *graph = NULL;
 202         enum bt_self_component_status status;
 203
 204         BT_ASSERT_PRE_NON_NULL(component, "Component");
 205         BT_ASSERT_PRE_NON_NULL(name, "Name");
 206         BT_ASSERT_PRE(strlen(name) > 0, "Name is empty");
 207         graph = bt_component_borrow_graph(component);
 208         BT_ASSERT_PRE(graph && !bt_graph_is_canceled(graph),
 209                 "Component's graph is canceled: %![comp-]+c, %![graph-]+g",
 210                 component, graph);
 211         BT_ASSERT_PRE(
 212                 graph->config_state == BT_GRAPH_CONFIGURATION_STATE_CONFIGURING,
 213                 "Component's graph is already configured: "
 214                 "%![comp-]+c, %![graph-]+g", component, graph);
 215
 216         // TODO: Validate that the name is not already used.
 217
 218         BT_LIB_LOGI("Adding port to component: %![comp-]+c, "
 219                 "port-type=%s, port-name=\"%s\"", component,
 220                 bt_port_type_string(port_type), name);
 221
 222         new_port = bt_port_create(component, port_type, name, user_data);
 223         if (!new_port) {
 224                 BT_LOGE_STR("Cannot create port object.");
 225                 status = BT_SELF_COMPONENT_STATUS_NOMEM;
 226                 goto error;
 227         }
 228
 229         /*
 230          * No name clash, add the port.
 231          * The component is now the port's parent; it should _not_
 232          * hold a reference to the port since the port's lifetime
 233          * is now protected by the component's own lifetime.
 234          */
 235         g_ptr_array_add(ports, new_port);
 236
 237         /*
 238          * Notify the graph's creator that a new port was added.
 239          */
 240         graph = bt_component_borrow_graph(component);
 241         if (graph) {
 242                 enum bt_graph_listener_status listener_status;
 243
 244                 listener_status = bt_graph_notify_port_added(graph, new_port);
 245                 if (listener_status != BT_GRAPH_LISTENER_STATUS_OK) {
 246                         bt_graph_make_faulty(graph);
 247                         status = listener_status;
 248                         goto error;
 249                 }
 250         }
 251
 252         BT_LIB_LOGI("Created and added port to component: "
 253                 "%![comp-]+c, %![port-]+p", component, new_port);
 254
 255         *port = new_port;
 256         status = BT_SELF_COMPONENT_STATUS_OK;
 257
 258         goto end;
 259 error:
 260         /*
 261          * We need to release the reference that we would otherwise have
 262          * returned to the caller.
 263          */
 264         BT_PORT_PUT_REF_AND_RESET(new_port);
 265
 266 end:
 267         return status;
 268 }
 269
 270 BT_HIDDEN
 271 uint64_t bt_component_get_input_port_count(const struct bt_component *comp)
 272 {
 273         BT_ASSERT_PRE_NON_NULL(comp, "Component");
 274         return (uint64_t) comp->input_ports->len;
 275 }
 276
 277 BT_HIDDEN
 278 uint64_t bt_component_get_output_port_count(const struct bt_component *comp)
 279 {
 280         BT_ASSERT_PRE_NON_NULL(comp, "Component");
 281         return (uint64_t) comp->output_ports->len;
 282 }
 283
 284 BT_HIDDEN
 285 int bt_component_create(struct bt_component_class *component_class,
 286                 const char *name, bt_logging_level log_level,
 287                 struct bt_component **user_component)
 288 {
 289         int ret = 0;
 290         struct bt_component *component = NULL;
 291         enum bt_component_class_type type;
 292
 293         BT_ASSERT(user_component);
 294         BT_ASSERT(component_class);
 295         BT_ASSERT(name);
 296         type = bt_component_class_get_type(component_class);
 297         BT_LIB_LOGI("Creating empty component from component class: %![cc-]+C, "
 298                 "comp-name=\"%s\", log-level=%s", component_class, name,
 299                 bt_common_logging_level_string(log_level));
 300         component = component_create_funcs[type](component_class);
 301         if (!component) {
 302                 BT_LOGE_STR("Cannot create specific component object.");
 303                 ret = -1;
 304                 goto end;
 305         }
 306
 307         bt_object_init_shared_with_parent(&component->base, destroy_component);
 308         component->class = component_class;
 309         bt_object_get_no_null_check(component->class);
 310         component->destroy = component_destroy_funcs[type];
 311         component->name = g_string_new(name);
 312         if (!component->name) {
 313                 BT_LOGE_STR("Failed to allocate one GString.");
 314                 ret = -1;
 315                 goto end;
 316         }
 317
 318         component->log_level = log_level;
 319         component->input_ports = g_ptr_array_new_with_free_func(
 320                 (GDestroyNotify) bt_object_try_spec_release);
 321         if (!component->input_ports) {
 322                 BT_LOGE_STR("Failed to allocate one GPtrArray.");
 323                 ret = -1;
 324                 goto end;
 325         }
 326
 327         component->output_ports = g_ptr_array_new_with_free_func(
 328                 (GDestroyNotify) bt_object_try_spec_release);
 329         if (!component->output_ports) {
 330                 BT_LOGE_STR("Failed to allocate one GPtrArray.");
 331                 ret = -1;
 332                 goto end;
 333         }
 334
 335         component->destroy_listeners = g_array_new(FALSE, TRUE,
 336                 sizeof(struct bt_component_destroy_listener));
 337         if (!component->destroy_listeners) {
 338                 BT_LOGE_STR("Failed to allocate one GArray.");
 339                 ret = -1;
 340                 goto end;
 341         }
 342
 343         BT_LIB_LOGI("Created empty component from component class: "
 344                 "%![cc-]+C, %![comp-]+c", component_class, component);
 345         BT_OBJECT_MOVE_REF(*user_component, component);
 346
 347 end:
 348         bt_object_put_ref(component);
 349         return ret;
 350 }
 351
 352 const char *bt_component_get_name(const struct bt_component *component)
 353 {
 354         BT_ASSERT_PRE_NON_NULL(component, "Component");
 355         return component->name->str;
 356 }
 357
 358 const struct bt_component_class *bt_component_borrow_class_const(
 359                 const struct bt_component *component)
 360 {
 361         BT_ASSERT_PRE_NON_NULL(component, "Component");
 362         return component->class;
 363 }
 364
 365 void *bt_self_component_get_data(const struct bt_self_component *self_comp)
 366 {
 367         struct bt_component *component = (void *) self_comp;
 368
 369         BT_ASSERT_PRE_NON_NULL(component, "Component");
 370         return component->user_data;
 371 }
 372
 373 void bt_self_component_set_data(struct bt_self_component *self_comp,
 374                 void *data)
 375 {
 376         struct bt_component *component = (void *) self_comp;
 377
 378         BT_ASSERT_PRE_NON_NULL(component, "Component");
 379         component->user_data = data;
 380         BT_LIB_LOGD("Set component's user data: %!+c", component);
 381 }
 382
 383 BT_HIDDEN
 384 void bt_component_set_graph(struct bt_component *component,
 385                 struct bt_graph *graph)
 386 {
 387         bt_object_set_parent(&component->base,
 388                 graph ? &graph->base : NULL);
 389 }
 390
 391 bt_bool bt_component_graph_is_canceled(const struct bt_component *component)
 392 {
 393         return bt_graph_is_canceled(
 394                 (void *) bt_object_borrow_parent(&component->base));
 395 }
 396
 397 static
 398 struct bt_port *borrow_port_by_name(GPtrArray *ports,
 399                 const char *name)
 400 {
 401         uint64_t i;
 402         struct bt_port *ret_port = NULL;
 403
 404         BT_ASSERT(name);
 405
 406         for (i = 0; i < ports->len; i++) {
 407                 struct bt_port *port = g_ptr_array_index(ports, i);
 408
 409                 if (!strcmp(name, port->name->str)) {
 410                         ret_port = port;
 411                         break;
 412                 }
 413         }
 414
 415         return ret_port;
 416 }
 417
 418 BT_HIDDEN
 419 struct bt_port_input *bt_component_borrow_input_port_by_name(
 420                 struct bt_component *comp, const char *name)
 421 {
 422         BT_ASSERT(comp);
 423         return (void *) borrow_port_by_name(comp->input_ports, name);
 424 }
 425
 426 BT_HIDDEN
 427 struct bt_port_output *bt_component_borrow_output_port_by_name(
 428                 struct bt_component *comp, const char *name)
 429 {
 430         BT_ASSERT_PRE_NON_NULL(comp, "Component");
 431         return (void *)
 432                 borrow_port_by_name(comp->output_ports, name);
 433 }
 434
 435 static
 436 struct bt_port *borrow_port_by_index(GPtrArray *ports, uint64_t index)
 437 {
 438         BT_ASSERT(index < ports->len);
 439         return g_ptr_array_index(ports, index);
 440 }
 441
 442 BT_HIDDEN
 443 struct bt_port_input *bt_component_borrow_input_port_by_index(
 444                 struct bt_component *comp, uint64_t index)
 445 {
 446         BT_ASSERT_PRE_NON_NULL(comp, "Component");
 447         BT_ASSERT_PRE_VALID_INDEX(index, comp->input_ports->len);
 448         return (void *)
 449                 borrow_port_by_index(comp->input_ports, index);
 450 }
 451
 452 BT_HIDDEN
 453 struct bt_port_output *bt_component_borrow_output_port_by_index(
 454                 struct bt_component *comp, uint64_t index)
 455 {
 456         BT_ASSERT_PRE_NON_NULL(comp, "Component");
 457         BT_ASSERT_PRE_VALID_INDEX(index, comp->output_ports->len);
 458         return (void *)
 459                 borrow_port_by_index(comp->output_ports, index);
 460 }
 461
 462 BT_HIDDEN
 463 enum bt_self_component_status bt_component_add_input_port(
 464                 struct bt_component *component, const char *name,
 465                 void *user_data, struct bt_port **port)
 466 {
 467         /* add_port() logs details */
 468         return add_port(component, component->input_ports,
 469                 BT_PORT_TYPE_INPUT, name, user_data, port);
 470 }
 471
 472 BT_HIDDEN
 473 enum bt_self_component_status bt_component_add_output_port(
 474                 struct bt_component *component, const char *name,
 475                 void *user_data, struct bt_port **port)
 476 {
 477         /* add_port() logs details */
 478         return add_port(component, component->output_ports,
 479                 BT_PORT_TYPE_OUTPUT, name, user_data, port);
 480 }
 481
 482 BT_HIDDEN
 483 enum bt_self_component_status bt_component_accept_port_connection(
 484                 struct bt_component *comp, struct bt_port *self_port,
 485                 struct bt_port *other_port)
 486 {
 487         typedef enum bt_self_component_status (*method_t)(
 488                 void *, void *, const void *);
 489
 490         enum bt_self_component_status status = BT_SELF_COMPONENT_STATUS_OK;
 491         method_t method = NULL;
 492
 493         BT_ASSERT(comp);
 494         BT_ASSERT(self_port);
 495         BT_ASSERT(other_port);
 496
 497         switch (comp->class->type) {
 498         case BT_COMPONENT_CLASS_TYPE_SOURCE:
 499         {
 500                 struct bt_component_class_source *src_cc = (void *) comp->class;
 501
 502                 switch (self_port->type) {
 503                 case BT_PORT_TYPE_OUTPUT:
 504                         method = (method_t) src_cc->methods.accept_output_port_connection;
 505                         break;
 506                 default:
 507                         abort();
 508                 }
 509
 510                 break;
 511         }
 512         case BT_COMPONENT_CLASS_TYPE_FILTER:
 513         {
 514                 struct bt_component_class_filter *flt_cc = (void *) comp->class;
 515
 516                 switch (self_port->type) {
 517                 case BT_PORT_TYPE_INPUT:
 518                         method = (method_t) flt_cc->methods.accept_input_port_connection;
 519                         break;
 520                 case BT_PORT_TYPE_OUTPUT:
 521                         method = (method_t) flt_cc->methods.accept_output_port_connection;
 522                         break;
 523                 default:
 524                         abort();
 525                 }
 526
 527                 break;
 528         }
 529         case BT_COMPONENT_CLASS_TYPE_SINK:
 530         {
 531                 struct bt_component_class_sink *sink_cc = (void *) comp->class;
 532
 533                 switch (self_port->type) {
 534                 case BT_PORT_TYPE_INPUT:
 535                         method = (method_t) sink_cc->methods.accept_input_port_connection;
 536                         break;
 537                 default:
 538                         abort();
 539                 }
 540
 541                 break;
 542         }
 543         default:
 544                 abort();
 545         }
 546
 547         if (method) {
 548                 BT_LIB_LOGD("Calling user's \"accept port connection\" method: "
 549                         "%![comp-]+c, %![self-port-]+p, %![other-port-]+p",
 550                         comp, self_port, other_port);
 551                 status = method(comp, self_port, (void *) other_port);
 552                 BT_LOGD("User method returned: status=%s",
 553                         bt_self_component_status_string(status));
 554         }
 555
 556         return status;
 557 }
 558
 559 BT_HIDDEN
 560 enum bt_self_component_status bt_component_port_connected(
 561                 struct bt_component *comp, struct bt_port *self_port,
 562                 struct bt_port *other_port)
 563 {
 564         typedef enum bt_self_component_status (*method_t)(
 565                 void *, void *, const void *);
 566
 567         enum bt_self_component_status status = BT_SELF_COMPONENT_STATUS_OK;
 568         method_t method = NULL;
 569
 570         BT_ASSERT(comp);
 571         BT_ASSERT(self_port);
 572         BT_ASSERT(other_port);
 573
 574         switch (comp->class->type) {
 575         case BT_COMPONENT_CLASS_TYPE_SOURCE:
 576         {
 577                 struct bt_component_class_source *src_cc = (void *) comp->class;
 578
 579                 switch (self_port->type) {
 580                 case BT_PORT_TYPE_OUTPUT:
 581                         method = (method_t) src_cc->methods.output_port_connected;
 582                         break;
 583                 default:
 584                         abort();
 585                 }
 586
 587                 break;
 588         }
 589         case BT_COMPONENT_CLASS_TYPE_FILTER:
 590         {
 591                 struct bt_component_class_filter *flt_cc = (void *) comp->class;
 592
 593                 switch (self_port->type) {
 594                 case BT_PORT_TYPE_INPUT:
 595                         method = (method_t) flt_cc->methods.input_port_connected;
 596                         break;
 597                 case BT_PORT_TYPE_OUTPUT:
 598                         method = (method_t) flt_cc->methods.output_port_connected;
 599                         break;
 600                 default:
 601                         abort();
 602                 }
 603
 604                 break;
 605         }
 606         case BT_COMPONENT_CLASS_TYPE_SINK:
 607         {
 608                 struct bt_component_class_sink *sink_cc = (void *) comp->class;
 609
 610                 switch (self_port->type) {
 611                 case BT_PORT_TYPE_INPUT:
 612                         method = (method_t) sink_cc->methods.input_port_connected;
 613                         break;
 614                 default:
 615                         abort();
 616                 }
 617
 618                 break;
 619         }
 620         default:
 621                 abort();
 622         }
 623
 624         if (method) {
 625                 BT_LIB_LOGD("Calling user's \"port connected\" method: "
 626                         "%![comp-]+c, %![self-port-]+p, %![other-port-]+p",
 627                         comp, self_port, other_port);
 628                 status = method(comp, self_port, (void *) other_port);
 629                 BT_LOGD("User method returned: status=%s",
 630                         bt_self_component_status_string(status));
 631                 BT_ASSERT_PRE(status == BT_SELF_COMPONENT_STATUS_OK ||
 632                         status == BT_SELF_COMPONENT_STATUS_ERROR ||
 633                         status == BT_SELF_COMPONENT_STATUS_NOMEM,
 634                         "Unexpected returned component status: status=%s",
 635                         bt_self_component_status_string(status));
 636         }
 637
 638         return status;
 639 }
 640
 641 BT_HIDDEN
 642 void bt_component_add_destroy_listener(struct bt_component *component,
 643                 bt_component_destroy_listener_func func, void *data)
 644 {
 645         struct bt_component_destroy_listener listener;
 646
 647         BT_ASSERT(component);
 648         BT_ASSERT(func);
 649         listener.func = func;
 650         listener.data = data;
 651         g_array_append_val(component->destroy_listeners, listener);
 652         BT_LIB_LOGD("Added destroy listener: %![comp-]+c, "
 653                 "func-addr=%p, data-addr=%p",
 654                 component, func, data);
 655 }
 656
 657 BT_HIDDEN
 658 void bt_component_remove_destroy_listener(struct bt_component *component,
 659                 bt_component_destroy_listener_func func, void *data)
 660 {
 661         uint64_t i;
 662
 663         BT_ASSERT(component);
 664         BT_ASSERT(func);
 665
 666         for (i = 0; i < component->destroy_listeners->len; i++) {
 667                 struct bt_component_destroy_listener *listener =
 668                         &g_array_index(component->destroy_listeners,
 669                                 struct bt_component_destroy_listener, i);
 670
 671                 if (listener->func == func && listener->data == data) {
 672                         g_array_remove_index(component->destroy_listeners, i);
 673                         i--;
 674                         BT_LIB_LOGD("Removed destroy listener: %![comp-]+c, "
 675                                 "func-addr=%p, data-addr=%p",
 676                                 component, func, data);
 677                 }
 678         }
 679 }
 680
 681 bt_logging_level bt_component_get_logging_level(
 682                 const struct bt_component *component)
 683 {
 684         BT_ASSERT_PRE_NON_NULL(component, "Component");
 685         return component->log_level;
 686 }
 687
 688 void bt_component_get_ref(const struct bt_component *component)
 689 {
 690         bt_object_get_ref(component);
 691 }
 692
 693 void bt_component_put_ref(const struct bt_component *component)
 694 {
 695         bt_object_put_ref(component);
 696 }