lib/graph/component-class.c

   1 /*
   2  * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
   3  * Copyright 2016 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 "COMP-CLASS"
  25 #include <babeltrace/lib-logging-internal.h>
  26
  27 #include <babeltrace/compiler-internal.h>
  28 #include <babeltrace/graph/component-class.h>
  29 #include <babeltrace/graph/component-class-const.h>
  30 #include <babeltrace/graph/component-class-source.h>
  31 #include <babeltrace/graph/component-class-source-const.h>
  32 #include <babeltrace/graph/component-class-filter.h>
  33 #include <babeltrace/graph/component-class-filter-const.h>
  34 #include <babeltrace/graph/component-class-sink.h>
  35 #include <babeltrace/graph/component-class-sink-const.h>
  36 #include <babeltrace/graph/component-class-internal.h>
  37 #include <babeltrace/object.h>
  38 #include <babeltrace/types.h>
  39 #include <babeltrace/assert-internal.h>
  40 #include <babeltrace/assert-pre-internal.h>
  41 #include <glib.h>
  42
  43 #define BT_ASSERT_PRE_COMP_CLS_HOT(_cc) \
  44         BT_ASSERT_PRE_HOT(((const struct bt_component_class *) (_cc)),  \
  45                 "Component class", ": %!+C", (_cc))
  46
  47 static
  48 void destroy_component_class(struct bt_object *obj)
  49 {
  50         struct bt_component_class *class;
  51         int i;
  52
  53         BT_ASSERT(obj);
  54         class = container_of(obj, struct bt_component_class, base);
  55
  56         BT_LIB_LOGD("Destroying component class: %!+C", class);
  57
  58         /* Call destroy listeners in reverse registration order */
  59         for (i = class->destroy_listeners->len - 1; i >= 0; i--) {
  60                 struct bt_component_class_destroy_listener *listener =
  61                         &g_array_index(class->destroy_listeners,
  62                                 struct bt_component_class_destroy_listener,
  63                                 i);
  64
  65                 BT_LOGD("Calling destroy listener: func-addr=%p, data-addr=%p",
  66                         listener->func, listener->data);
  67                 listener->func(class, listener->data);
  68         }
  69
  70         if (class->name) {
  71                 g_string_free(class->name, TRUE);
  72                 class->name = NULL;
  73         }
  74
  75         if (class->description) {
  76                 g_string_free(class->description, TRUE);
  77                 class->description = NULL;
  78         }
  79
  80         if (class->help) {
  81                 g_string_free(class->help, TRUE);
  82                 class->help = NULL;
  83         }
  84
  85         if (class->destroy_listeners) {
  86                 g_array_free(class->destroy_listeners, TRUE);
  87                 class->destroy_listeners = NULL;
  88         }
  89
  90         g_free(class);
  91 }
  92
  93 static
  94 int bt_component_class_init(struct bt_component_class *class,
  95                 enum bt_component_class_type type, const char *name)
  96 {
  97         int ret = 0;
  98
  99         bt_object_init_shared(&class->base, destroy_component_class);
 100         class->type = type;
 101         class->name = g_string_new(name);
 102         if (!class->name) {
 103                 BT_LOGE_STR("Failed to allocate a GString.");
 104                 goto error;
 105         }
 106
 107         class->description = g_string_new(NULL);
 108         if (!class->description) {
 109                 BT_LOGE_STR("Failed to allocate a GString.");
 110                 goto error;
 111         }
 112
 113         class->help = g_string_new(NULL);
 114         if (!class->help) {
 115                 BT_LOGE_STR("Failed to allocate a GString.");
 116                 goto error;
 117         }
 118
 119         class->destroy_listeners = g_array_new(FALSE, TRUE,
 120                 sizeof(struct bt_component_class_destroy_listener));
 121         if (!class->destroy_listeners) {
 122                 BT_LOGE_STR("Failed to allocate a GArray.");
 123                 goto error;
 124         }
 125
 126         goto end;
 127
 128 error:
 129         BT_OBJECT_PUT_REF_AND_RESET(class);
 130         ret = -1;
 131
 132 end:
 133         return ret;
 134 }
 135
 136 struct bt_component_class_source *bt_component_class_source_create(
 137                 const char *name,
 138                 bt_component_class_source_notification_iterator_next_method method)
 139 {
 140         struct bt_component_class_source *source_class = NULL;
 141         int ret;
 142
 143         BT_ASSERT_PRE_NON_NULL(name, "Name");
 144         BT_ASSERT_PRE_NON_NULL(method, "Notification iterator next method");
 145         BT_LOGD("Creating source component class: "
 146                 "name=\"%s\", notif-iter-next-method-addr=%p",
 147                 name, method);
 148         source_class = g_new0(struct bt_component_class_source, 1);
 149         if (!source_class) {
 150                 BT_LOGE_STR("Failed to allocate one source component class.");
 151                 goto end;
 152         }
 153
 154         /* bt_component_class_init() logs errors */
 155         ret = bt_component_class_init(&source_class->parent,
 156                 BT_COMPONENT_CLASS_TYPE_SOURCE, name);
 157         if (ret) {
 158                 /*
 159                  * If bt_component_class_init() fails, the component
 160                  * class is put, therefore its memory is already
 161                  * freed.
 162                  */
 163                 source_class = NULL;
 164                 goto end;
 165         }
 166
 167         source_class->methods.notif_iter_next = method;
 168         BT_LIB_LOGD("Created source component class: %!+C", source_class);
 169
 170 end:
 171         return (void *) source_class;
 172 }
 173
 174 struct bt_component_class_filter *bt_component_class_filter_create(
 175                 const char *name,
 176                 bt_component_class_filter_notification_iterator_next_method method)
 177 {
 178         struct bt_component_class_filter *filter_class = NULL;
 179         int ret;
 180
 181         BT_ASSERT_PRE_NON_NULL(name, "Name");
 182         BT_ASSERT_PRE_NON_NULL(method, "Notification iterator next method");
 183         BT_LOGD("Creating filter component class: "
 184                 "name=\"%s\", notif-iter-next-method-addr=%p",
 185                 name, method);
 186         filter_class = g_new0(struct bt_component_class_filter, 1);
 187         if (!filter_class) {
 188                 BT_LOGE_STR("Failed to allocate one filter component class.");
 189                 goto end;
 190         }
 191
 192         /* bt_component_class_init() logs errors */
 193         ret = bt_component_class_init(&filter_class->parent,
 194                 BT_COMPONENT_CLASS_TYPE_FILTER, name);
 195         if (ret) {
 196                 /*
 197                  * If bt_component_class_init() fails, the component
 198                  * class is put, therefore its memory is already
 199                  * freed.
 200                  */
 201                 filter_class = NULL;
 202                 goto end;
 203         }
 204
 205         filter_class->methods.notif_iter_next = method;
 206         BT_LIB_LOGD("Created filter component class: %!+C", filter_class);
 207
 208 end:
 209         return (void *) filter_class;
 210 }
 211
 212 struct bt_component_class_sink *bt_component_class_sink_create(
 213                 const char *name, bt_component_class_sink_consume_method method)
 214 {
 215         struct bt_component_class_sink *sink_class = NULL;
 216         int ret;
 217
 218         BT_ASSERT_PRE_NON_NULL(name, "Name");
 219         BT_ASSERT_PRE_NON_NULL(method, "Consume next method");
 220         BT_LOGD("Creating sink component class: "
 221                 "name=\"%s\", consume-method-addr=%p",
 222                 name, method);
 223         sink_class = g_new0(struct bt_component_class_sink, 1);
 224         if (!sink_class) {
 225                 BT_LOGE_STR("Failed to allocate one sink component class.");
 226                 goto end;
 227         }
 228
 229         /* bt_component_class_init() logs errors */
 230         ret = bt_component_class_init(&sink_class->parent,
 231                 BT_COMPONENT_CLASS_TYPE_SINK, name);
 232         if (ret) {
 233                 /*
 234                  * If bt_component_class_init() fails, the component
 235                  * class is put, therefore its memory is already
 236                  * freed.
 237                  */
 238                 sink_class = NULL;
 239                 goto end;
 240         }
 241
 242         sink_class->methods.consume = method;
 243         BT_LIB_LOGD("Created sink component class: %!+C", sink_class);
 244
 245 end:
 246         return (void *) sink_class;
 247 }
 248
 249 int bt_component_class_source_set_init_method(
 250                 struct bt_component_class_source *comp_cls,
 251                 bt_component_class_source_init_method method)
 252 {
 253         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 254         BT_ASSERT_PRE_NON_NULL(method, "Method");
 255         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 256         comp_cls->methods.init = method;
 257         BT_LIB_LOGV("Set source component class's initialization method: "
 258                 "%!+C", comp_cls);
 259         return 0;
 260 }
 261
 262 int bt_component_class_filter_set_init_method(
 263                 struct bt_component_class_filter *comp_cls,
 264                 bt_component_class_filter_init_method method)
 265 {
 266         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 267         BT_ASSERT_PRE_NON_NULL(method, "Method");
 268         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 269         comp_cls->methods.init = method;
 270         BT_LIB_LOGV("Set filter component class's initialization method: "
 271                 "%!+C", comp_cls);
 272         return 0;
 273 }
 274
 275 int bt_component_class_sink_set_init_method(
 276                 struct bt_component_class_sink *comp_cls,
 277                 bt_component_class_sink_init_method method)
 278 {
 279         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 280         BT_ASSERT_PRE_NON_NULL(method, "Method");
 281         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 282         comp_cls->methods.init = method;
 283         BT_LIB_LOGV("Set sink component class's initialization method: "
 284                 "%!+C", comp_cls);
 285         return 0;
 286 }
 287
 288 int bt_component_class_source_set_finalize_method(
 289                 struct bt_component_class_source *comp_cls,
 290                 bt_component_class_source_finalize_method method)
 291 {
 292         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 293         BT_ASSERT_PRE_NON_NULL(method, "Method");
 294         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 295         comp_cls->methods.finalize = method;
 296         BT_LIB_LOGV("Set source component class's finalization method: "
 297                 "%!+C", comp_cls);
 298         return 0;
 299 }
 300
 301 int bt_component_class_filter_set_finalize_method(
 302                 struct bt_component_class_filter *comp_cls,
 303                 bt_component_class_filter_finalize_method method)
 304 {
 305         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 306         BT_ASSERT_PRE_NON_NULL(method, "Method");
 307         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 308         comp_cls->methods.finalize = method;
 309         BT_LIB_LOGV("Set filter component class's finalization method: "
 310                 "%!+C", comp_cls);
 311         return 0;
 312 }
 313
 314 int bt_component_class_sink_set_finalize_method(
 315                 struct bt_component_class_sink *comp_cls,
 316                 bt_component_class_sink_finalize_method method)
 317 {
 318         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 319         BT_ASSERT_PRE_NON_NULL(method, "Method");
 320         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 321         comp_cls->methods.finalize = method;
 322         BT_LIB_LOGV("Set sink component class's finalization method: "
 323                 "%!+C", comp_cls);
 324         return 0;
 325 }
 326
 327 int bt_component_class_source_set_query_method(
 328                 struct bt_component_class_source *comp_cls,
 329                 bt_component_class_source_query_method method)
 330 {
 331         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 332         BT_ASSERT_PRE_NON_NULL(method, "Method");
 333         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 334         comp_cls->methods.query = method;
 335         BT_LIB_LOGV("Set source component class's query method: "
 336                 "%!+C", comp_cls);
 337         return 0;
 338 }
 339
 340 int bt_component_class_filter_set_query_method(
 341                 struct bt_component_class_filter *comp_cls,
 342                 bt_component_class_filter_query_method method)
 343 {
 344         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 345         BT_ASSERT_PRE_NON_NULL(method, "Method");
 346         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 347         comp_cls->methods.query = method;
 348         BT_LIB_LOGV("Set filter component class's query method: "
 349                 "%!+C", comp_cls);
 350         return 0;
 351 }
 352
 353 int bt_component_class_sink_set_query_method(
 354                 struct bt_component_class_sink *comp_cls,
 355                 bt_component_class_sink_query_method method)
 356 {
 357         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 358         BT_ASSERT_PRE_NON_NULL(method, "Method");
 359         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 360         comp_cls->methods.query = method;
 361         BT_LIB_LOGV("Set sink component class's query method: "
 362                 "%!+C", comp_cls);
 363         return 0;
 364 }
 365
 366 int bt_component_class_filter_set_accept_input_port_connection_method(
 367                 struct bt_component_class_filter *comp_cls,
 368                 bt_component_class_filter_accept_input_port_connection_method method)
 369 {
 370         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 371         BT_ASSERT_PRE_NON_NULL(method, "Method");
 372         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 373         comp_cls->methods.accept_input_port_connection = method;
 374         BT_LIB_LOGV("Set filter component class's \"accept input port connection\" method"
 375                 ": %!+C", comp_cls);
 376         return 0;
 377 }
 378
 379 int bt_component_class_sink_set_accept_input_port_connection_method(
 380                 struct bt_component_class_sink *comp_cls,
 381                 bt_component_class_sink_accept_input_port_connection_method method)
 382 {
 383         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 384         BT_ASSERT_PRE_NON_NULL(method, "Method");
 385         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 386         comp_cls->methods.accept_input_port_connection = method;
 387         BT_LIB_LOGV("Set sink component class's \"accept input port connection\" method"
 388                 ": %!+C", comp_cls);
 389         return 0;
 390 }
 391
 392 int bt_component_class_source_set_accept_output_port_connection_method(
 393                 struct bt_component_class_source *comp_cls,
 394                 bt_component_class_source_accept_output_port_connection_method method)
 395 {
 396         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 397         BT_ASSERT_PRE_NON_NULL(method, "Method");
 398         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 399         comp_cls->methods.accept_output_port_connection = method;
 400         BT_LIB_LOGV("Set source component class's \"accept output port connection\" method"
 401                 ": %!+C", comp_cls);
 402         return 0;
 403 }
 404
 405 int bt_component_class_filter_set_accept_output_port_connection_method(
 406                 struct bt_component_class_filter *comp_cls,
 407                 bt_component_class_filter_accept_output_port_connection_method method)
 408 {
 409         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 410         BT_ASSERT_PRE_NON_NULL(method, "Method");
 411         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 412         comp_cls->methods.accept_output_port_connection = method;
 413         BT_LIB_LOGV("Set filter component class's \"accept output port connection\" method"
 414                 ": %!+C", comp_cls);
 415         return 0;
 416 }
 417
 418 int bt_component_class_filter_set_input_port_connected_method(
 419                 struct bt_component_class_filter *comp_cls,
 420                 bt_component_class_filter_input_port_connected_method method)
 421 {
 422         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 423         BT_ASSERT_PRE_NON_NULL(method, "Method");
 424         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 425         comp_cls->methods.input_port_connected = method;
 426         BT_LIB_LOGV("Set filter component class's \"input port connected\" method"
 427                 ": %!+C", comp_cls);
 428         return 0;
 429 }
 430
 431 int bt_component_class_sink_set_input_port_connected_method(
 432                 struct bt_component_class_sink *comp_cls,
 433                 bt_component_class_sink_input_port_connected_method method)
 434 {
 435         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 436         BT_ASSERT_PRE_NON_NULL(method, "Method");
 437         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 438         comp_cls->methods.input_port_connected = method;
 439         BT_LIB_LOGV("Set sink component class's \"input port connected\" method"
 440                 ": %!+C", comp_cls);
 441         return 0;
 442 }
 443
 444 int bt_component_class_source_set_output_port_connected_method(
 445                 struct bt_component_class_source *comp_cls,
 446                 bt_component_class_source_output_port_connected_method method)
 447 {
 448         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 449         BT_ASSERT_PRE_NON_NULL(method, "Method");
 450         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 451         comp_cls->methods.output_port_connected = method;
 452         BT_LIB_LOGV("Set source component class's \"output port connected\" method"
 453                 ": %!+C", comp_cls);
 454         return 0;
 455 }
 456
 457 int bt_component_class_filter_set_output_port_connected_method(
 458                 struct bt_component_class_filter *comp_cls,
 459                 bt_component_class_filter_output_port_connected_method method)
 460 {
 461         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 462         BT_ASSERT_PRE_NON_NULL(method, "Method");
 463         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 464         comp_cls->methods.output_port_connected = method;
 465         BT_LIB_LOGV("Set filter component class's \"output port connected\" method"
 466                 ": %!+C", comp_cls);
 467         return 0;
 468 }
 469
 470 int bt_component_class_filter_set_input_port_disconnected_method(
 471                 struct bt_component_class_filter *comp_cls,
 472                 bt_component_class_filter_input_port_disconnected_method method)
 473 {
 474         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 475         BT_ASSERT_PRE_NON_NULL(method, "Method");
 476         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 477         comp_cls->methods.input_port_disconnected = method;
 478         BT_LIB_LOGV("Set filter component class's \"input port disconnected\" method"
 479                 ": %!+C", comp_cls);
 480         return 0;
 481 }
 482
 483 int bt_component_class_sink_set_input_port_disconnected_method(
 484                 struct bt_component_class_sink *comp_cls,
 485                 bt_component_class_sink_input_port_disconnected_method method)
 486 {
 487         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 488         BT_ASSERT_PRE_NON_NULL(method, "Method");
 489         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 490         comp_cls->methods.input_port_disconnected = method;
 491         BT_LIB_LOGV("Set sink component class's \"input port disconnected\" method"
 492                 ": %!+C", comp_cls);
 493         return 0;
 494 }
 495
 496 int bt_component_class_source_set_output_port_disconnected_method(
 497                 struct bt_component_class_source *comp_cls,
 498                 bt_component_class_source_output_port_disconnected_method method)
 499 {
 500         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 501         BT_ASSERT_PRE_NON_NULL(method, "Method");
 502         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 503         comp_cls->methods.output_port_disconnected = method;
 504         BT_LIB_LOGV("Set source component class's \"output port disconnected\" method"
 505                 ": %!+C", comp_cls);
 506         return 0;
 507 }
 508
 509 int bt_component_class_filter_set_output_port_disconnected_method(
 510                 struct bt_component_class_filter *comp_cls,
 511                 bt_component_class_filter_output_port_disconnected_method method)
 512 {
 513         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 514         BT_ASSERT_PRE_NON_NULL(method, "Method");
 515         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 516         comp_cls->methods.output_port_disconnected = method;
 517         BT_LIB_LOGV("Set filter component class's \"output port disconnected\" method"
 518                 ": %!+C", comp_cls);
 519         return 0;
 520 }
 521
 522 int bt_component_class_source_set_notification_iterator_init_method(
 523                 struct bt_component_class_source *comp_cls,
 524                 bt_component_class_source_notification_iterator_init_method method)
 525 {
 526         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 527         BT_ASSERT_PRE_NON_NULL(method, "Method");
 528         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 529         comp_cls->methods.notif_iter_init = method;
 530         BT_LIB_LOGV("Set source component class's notification iterator initialization method"
 531                 ": %!+C", comp_cls);
 532         return 0;
 533 }
 534
 535 int bt_component_class_filter_set_notification_iterator_init_method(
 536                 struct bt_component_class_filter *comp_cls,
 537                 bt_component_class_filter_notification_iterator_init_method method)
 538 {
 539         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 540         BT_ASSERT_PRE_NON_NULL(method, "Method");
 541         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 542         comp_cls->methods.notif_iter_init = method;
 543         BT_LIB_LOGV("Set filter component class's notification iterator initialization method"
 544                 ": %!+C", comp_cls);
 545         return 0;
 546 }
 547
 548 int bt_component_class_source_set_notification_iterator_finalize_method(
 549                 struct bt_component_class_source *comp_cls,
 550                 bt_component_class_source_notification_iterator_finalize_method method)
 551 {
 552         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 553         BT_ASSERT_PRE_NON_NULL(method, "Method");
 554         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 555         comp_cls->methods.notif_iter_finalize = method;
 556         BT_LIB_LOGV("Set source component class's notification iterator finalization method"
 557                 ": %!+C", comp_cls);
 558         return 0;
 559 }
 560
 561 int bt_component_class_filter_set_notification_iterator_finalize_method(
 562                 struct bt_component_class_filter *comp_cls,
 563                 bt_component_class_filter_notification_iterator_finalize_method method)
 564 {
 565         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 566         BT_ASSERT_PRE_NON_NULL(method, "Method");
 567         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 568         comp_cls->methods.notif_iter_finalize = method;
 569         BT_LIB_LOGV("Set filter component class's notification iterator finalization method"
 570                 ": %!+C", comp_cls);
 571         return 0;
 572 }
 573
 574 int bt_component_class_set_description(
 575                 struct bt_component_class *comp_cls,
 576                 const char *description)
 577 {
 578         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 579         BT_ASSERT_PRE_NON_NULL(description, "Description");
 580         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 581         g_string_assign(comp_cls->description, description);
 582         BT_LIB_LOGV("Set component class's description: "
 583                 "addr=%p, name=\"%s\", type=%s",
 584                 comp_cls,
 585                 bt_component_class_get_name(comp_cls),
 586                 bt_component_class_type_string(comp_cls->type));
 587         return 0;
 588 }
 589
 590 int bt_component_class_set_help(
 591                 struct bt_component_class *comp_cls,
 592                 const char *help)
 593 {
 594         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 595         BT_ASSERT_PRE_NON_NULL(help, "Help");
 596         BT_ASSERT_PRE_COMP_CLS_HOT(comp_cls);
 597         g_string_assign(comp_cls->help, help);
 598         BT_LIB_LOGV("Set component class's help text: %!+C", comp_cls);
 599         return 0;
 600 }
 601
 602 const char *bt_component_class_get_name(const struct bt_component_class *comp_cls)
 603 {
 604         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 605         return comp_cls->name->str;
 606 }
 607
 608 enum bt_component_class_type bt_component_class_get_type(
 609                 const struct bt_component_class *comp_cls)
 610 {
 611         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 612         return comp_cls->type;
 613 }
 614
 615 const char *bt_component_class_get_description(
 616                 const struct bt_component_class *comp_cls)
 617 {
 618         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 619         return comp_cls->description &&
 620                 comp_cls->description->str[0] != '\0' ?
 621                 comp_cls->description->str : NULL;
 622 }
 623
 624 const char *bt_component_class_get_help(
 625                 const struct bt_component_class *comp_cls)
 626 {
 627         BT_ASSERT_PRE_NON_NULL(comp_cls, "Component class");
 628         return comp_cls->help &&
 629                 comp_cls->help->str[0] != '\0' ? comp_cls->help->str : NULL;
 630 }
 631
 632 BT_HIDDEN
 633 void bt_component_class_add_destroy_listener(
 634                 struct bt_component_class *comp_cls,
 635                 bt_component_class_destroy_listener_func func, void *data)
 636 {
 637         struct bt_component_class_destroy_listener listener;
 638
 639         BT_ASSERT(comp_cls);
 640         BT_ASSERT(func);
 641         listener.func = func;
 642         listener.data = data;
 643         g_array_append_val(comp_cls->destroy_listeners, listener);
 644         BT_LIB_LOGV("Added destroy listener to component class: "
 645                 "%![cc-]+C, listener-func-addr=%p", comp_cls, func);
 646 }
 647
 648 BT_HIDDEN
 649 void _bt_component_class_freeze(const struct bt_component_class *comp_cls)
 650 {
 651         BT_ASSERT(comp_cls);
 652         BT_LIB_LOGD("Freezing component class: %!+C", comp_cls);
 653         ((struct bt_component_class *) comp_cls)->frozen = true;
 654 }