lib/trace-ir/stream-class.c

   1 /*
   2  * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
   3  * Copyright 2013, 2014 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 "STREAM-CLASS"
  25 #include <babeltrace/lib-logging-internal.h>
  26
  27 #include <babeltrace/assert-pre-internal.h>
  28 #include <babeltrace/trace-ir/clock-class-internal.h>
  29 #include <babeltrace/trace-ir/event-class-internal.h>
  30 #include <babeltrace/trace-ir/field-class-internal.h>
  31 #include <babeltrace/trace-ir/field-internal.h>
  32 #include <babeltrace/trace-ir/stream-class-internal.h>
  33 #include <babeltrace/trace-ir/trace-const.h>
  34 #include <babeltrace/trace-ir/trace-internal.h>
  35 #include <babeltrace/trace-ir/utils-internal.h>
  36 #include <babeltrace/trace-ir/field-wrapper-internal.h>
  37 #include <babeltrace/trace-ir/resolve-field-path-internal.h>
  38 #include <babeltrace/compiler-internal.h>
  39 #include <babeltrace/align-internal.h>
  40 #include <babeltrace/endian-internal.h>
  41 #include <babeltrace/assert-internal.h>
  42 #include <babeltrace/property-internal.h>
  43 #include <inttypes.h>
  44 #include <stdint.h>
  45 #include <stdbool.h>
  46
  47 #define BT_ASSERT_PRE_STREAM_CLASS_HOT(_sc) \
  48         BT_ASSERT_PRE_HOT((_sc), "Stream class", ": %!+S", (_sc))
  49
  50 static
  51 void destroy_stream_class(struct bt_object *obj)
  52 {
  53         struct bt_stream_class *stream_class = (void *) obj;
  54
  55         BT_LIB_LOGD("Destroying stream class: %!+S", stream_class);
  56         BT_LOGD_STR("Putting default clock class.");
  57         BT_OBJECT_PUT_REF_AND_RESET(stream_class->default_clock_class);
  58
  59         if (stream_class->event_classes) {
  60                 BT_LOGD_STR("Destroying event classes.");
  61                 g_ptr_array_free(stream_class->event_classes, TRUE);
  62                 stream_class->event_classes = NULL;
  63         }
  64
  65         if (stream_class->name.str) {
  66                 g_string_free(stream_class->name.str, TRUE);
  67                 stream_class->name.str = NULL;
  68                 stream_class->name.value = NULL;
  69         }
  70
  71         BT_LOGD_STR("Putting event header field class.");
  72         BT_OBJECT_PUT_REF_AND_RESET(stream_class->event_header_fc);
  73         BT_LOGD_STR("Putting packet context field class.");
  74         BT_OBJECT_PUT_REF_AND_RESET(stream_class->packet_context_fc);
  75         BT_LOGD_STR("Putting event common context field class.");
  76         BT_OBJECT_PUT_REF_AND_RESET(stream_class->event_common_context_fc);
  77         bt_object_pool_finalize(&stream_class->event_header_field_pool);
  78         bt_object_pool_finalize(&stream_class->packet_context_field_pool);
  79         g_free(stream_class);
  80 }
  81
  82 static
  83 void free_field_wrapper(struct bt_field_wrapper *field_wrapper,
  84                 struct bt_stream_class *stream_class)
  85 {
  86         bt_field_wrapper_destroy((void *) field_wrapper);
  87 }
  88
  89 BT_ASSERT_PRE_FUNC
  90 static
  91 bool stream_class_id_is_unique(const struct bt_trace_class *tc, uint64_t id)
  92 {
  93         uint64_t i;
  94         bool is_unique = true;
  95
  96         for (i = 0; i < tc->stream_classes->len; i++) {
  97                 const struct bt_stream_class *sc =
  98                         tc->stream_classes->pdata[i];
  99
 100                 if (sc->id == id) {
 101                         is_unique = false;
 102                         goto end;
 103                 }
 104         }
 105
 106 end:
 107         return is_unique;
 108 }
 109
 110 static
 111 struct bt_stream_class *create_stream_class_with_id(
 112                 struct bt_trace_class *tc, uint64_t id)
 113 {
 114         struct bt_stream_class *stream_class = NULL;
 115         int ret;
 116
 117         BT_ASSERT(tc);
 118         BT_ASSERT_PRE(stream_class_id_is_unique(tc, id),
 119                 "Duplicate stream class ID: %![tc-]+T, id=%" PRIu64, tc, id);
 120         BT_LIB_LOGD("Creating stream class object: %![tc-]+T, id=%" PRIu64,
 121                 tc, id);
 122         stream_class = g_new0(struct bt_stream_class, 1);
 123         if (!stream_class) {
 124                 BT_LOGE_STR("Failed to allocate one stream class.");
 125                 goto error;
 126         }
 127
 128         bt_object_init_shared_with_parent(&stream_class->base,
 129                 destroy_stream_class);
 130
 131         stream_class->name.str = g_string_new(NULL);
 132         if (!stream_class->name.str) {
 133                 BT_LOGE_STR("Failed to allocate a GString.");
 134                 ret = -1;
 135                 goto end;
 136         }
 137
 138         stream_class->id = id;
 139         stream_class->assigns_automatic_event_class_id = true;
 140         stream_class->assigns_automatic_stream_id = true;
 141         stream_class->event_classes = g_ptr_array_new_with_free_func(
 142                 (GDestroyNotify) bt_object_try_spec_release);
 143         if (!stream_class->event_classes) {
 144                 BT_LOGE_STR("Failed to allocate a GPtrArray.");
 145                 goto error;
 146         }
 147
 148         ret = bt_object_pool_initialize(&stream_class->event_header_field_pool,
 149                 (bt_object_pool_new_object_func) bt_field_wrapper_new,
 150                 (bt_object_pool_destroy_object_func) free_field_wrapper,
 151                 stream_class);
 152         if (ret) {
 153                 BT_LOGE("Failed to initialize event header field pool: ret=%d",
 154                         ret);
 155                 goto error;
 156         }
 157
 158         ret = bt_object_pool_initialize(&stream_class->packet_context_field_pool,
 159                 (bt_object_pool_new_object_func) bt_field_wrapper_new,
 160                 (bt_object_pool_destroy_object_func) free_field_wrapper,
 161                 stream_class);
 162         if (ret) {
 163                 BT_LOGE("Failed to initialize packet context field pool: ret=%d",
 164                         ret);
 165                 goto error;
 166         }
 167
 168         bt_object_set_parent(&stream_class->base, &tc->base);
 169         g_ptr_array_add(tc->stream_classes, stream_class);
 170         bt_trace_class_freeze(tc);
 171         BT_LIB_LOGD("Created stream class object: %!+S", stream_class);
 172         goto end;
 173
 174 error:
 175         BT_OBJECT_PUT_REF_AND_RESET(stream_class);
 176
 177 end:
 178         return stream_class;
 179 }
 180
 181 struct bt_stream_class *bt_stream_class_create(struct bt_trace_class *tc)
 182 {
 183         BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
 184         BT_ASSERT_PRE(tc->assigns_automatic_stream_class_id,
 185                 "Trace class does not automatically assigns stream class IDs: "
 186                 "%![sc-]+T", tc);
 187         return create_stream_class_with_id(tc,
 188                 (uint64_t) tc->stream_classes->len);
 189 }
 190
 191 struct bt_stream_class *bt_stream_class_create_with_id(
 192                 struct bt_trace_class *tc, uint64_t id)
 193 {
 194         BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
 195         BT_ASSERT_PRE(!tc->assigns_automatic_stream_class_id,
 196                 "Trace class automatically assigns stream class IDs: "
 197                 "%![sc-]+T", tc);
 198         return create_stream_class_with_id(tc, id);
 199 }
 200
 201 struct bt_trace_class *bt_stream_class_borrow_trace_class(
 202                 struct bt_stream_class *stream_class)
 203 {
 204         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 205         return bt_stream_class_borrow_trace_class_inline(stream_class);
 206 }
 207
 208 const struct bt_trace_class *bt_stream_class_borrow_trace_class_const(
 209                 const struct bt_stream_class *stream_class)
 210 {
 211         return bt_stream_class_borrow_trace_class((void *) stream_class);
 212 }
 213
 214 const char *bt_stream_class_get_name(const struct bt_stream_class *stream_class)
 215 {
 216         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 217         return stream_class->name.value;
 218 }
 219
 220 enum bt_stream_class_status bt_stream_class_set_name(
 221                 struct bt_stream_class *stream_class,
 222                 const char *name)
 223 {
 224         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 225         BT_ASSERT_PRE_NON_NULL(name, "Name");
 226         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 227         g_string_assign(stream_class->name.str, name);
 228         stream_class->name.value = stream_class->name.str->str;
 229         BT_LIB_LOGV("Set stream class's name: %!+S", stream_class);
 230         return BT_STREAM_CLASS_STATUS_OK;
 231 }
 232
 233 uint64_t bt_stream_class_get_id(const struct bt_stream_class *stream_class)
 234 {
 235         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 236         return stream_class->id;
 237 }
 238
 239 uint64_t bt_stream_class_get_event_class_count(
 240                 const struct bt_stream_class *stream_class)
 241 {
 242         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 243         return (uint64_t) stream_class->event_classes->len;
 244 }
 245
 246 struct bt_event_class *bt_stream_class_borrow_event_class_by_index(
 247                 struct bt_stream_class *stream_class, uint64_t index)
 248 {
 249         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 250         BT_ASSERT_PRE_VALID_INDEX(index, stream_class->event_classes->len);
 251         return g_ptr_array_index(stream_class->event_classes, index);
 252 }
 253
 254 const struct bt_event_class *
 255 bt_stream_class_borrow_event_class_by_index_const(
 256                 const struct bt_stream_class *stream_class, uint64_t index)
 257 {
 258         return bt_stream_class_borrow_event_class_by_index(
 259                 (void *) stream_class, index);
 260 }
 261
 262 struct bt_event_class *bt_stream_class_borrow_event_class_by_id(
 263                 struct bt_stream_class *stream_class, uint64_t id)
 264 {
 265         struct bt_event_class *event_class = NULL;
 266         uint64_t i;
 267
 268         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 269
 270         for (i = 0; i < stream_class->event_classes->len; i++) {
 271                 struct bt_event_class *event_class_candidate =
 272                         g_ptr_array_index(stream_class->event_classes, i);
 273
 274                 if (event_class_candidate->id == id) {
 275                         event_class = event_class_candidate;
 276                         goto end;
 277                 }
 278         }
 279
 280 end:
 281         return event_class;
 282 }
 283
 284 const struct bt_event_class *
 285 bt_stream_class_borrow_event_class_by_id_const(
 286                 const struct bt_stream_class *stream_class, uint64_t id)
 287 {
 288         return bt_stream_class_borrow_event_class_by_id(
 289                 (void *) stream_class, id);
 290 }
 291
 292 const struct bt_field_class *
 293 bt_stream_class_borrow_packet_context_field_class_const(
 294                 const struct bt_stream_class *stream_class)
 295 {
 296         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 297         return stream_class->packet_context_fc;
 298 }
 299
 300 enum bt_stream_class_status bt_stream_class_set_packet_context_field_class(
 301                 struct bt_stream_class *stream_class,
 302                 struct bt_field_class *field_class)
 303 {
 304         int ret;
 305         struct bt_resolve_field_path_context resolve_ctx = {
 306                 .packet_header = NULL,
 307                 .packet_context = field_class,
 308                 .event_header = NULL,
 309                 .event_common_context = NULL,
 310                 .event_specific_context = NULL,
 311                 .event_payload = NULL,
 312         };
 313
 314         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 315         BT_ASSERT_PRE_NON_NULL(field_class, "Field class");
 316         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 317         BT_ASSERT_PRE(bt_field_class_get_type(field_class) ==
 318                 BT_FIELD_CLASS_TYPE_STRUCTURE,
 319                 "Packet context field class is not a structure field class: %!+F",
 320                 field_class);
 321         resolve_ctx.packet_header =
 322                 bt_stream_class_borrow_trace_class_inline(stream_class)->packet_header_fc;
 323         ret = bt_resolve_field_paths(field_class, &resolve_ctx);
 324         if (ret) {
 325                 /*
 326                  * This is the only reason for which
 327                  * bt_resolve_field_paths() can fail: anything else
 328                  * would be because a precondition is not satisfied.
 329                  */
 330                 ret = BT_STREAM_CLASS_STATUS_NOMEM;
 331                 goto end;
 332         }
 333
 334         bt_field_class_make_part_of_trace_class(field_class);
 335         bt_object_put_ref(stream_class->packet_context_fc);
 336         stream_class->packet_context_fc = field_class;
 337         bt_object_get_no_null_check(stream_class->packet_context_fc);
 338         bt_field_class_freeze(field_class);
 339         BT_LIB_LOGV("Set stream class's packet context field class: %!+S",
 340                 stream_class);
 341
 342 end:
 343         return ret;
 344 }
 345
 346 const struct bt_field_class *bt_stream_class_borrow_event_header_field_class_const(
 347                 const struct bt_stream_class *stream_class)
 348 {
 349         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 350         return stream_class->event_header_fc;
 351 }
 352
 353 enum bt_stream_class_status bt_stream_class_set_event_header_field_class(
 354                 struct bt_stream_class *stream_class,
 355                 struct bt_field_class *field_class)
 356 {
 357         int ret;
 358         struct bt_resolve_field_path_context resolve_ctx = {
 359                 .packet_header = NULL,
 360                 .packet_context = NULL,
 361                 .event_header = field_class,
 362                 .event_common_context = NULL,
 363                 .event_specific_context = NULL,
 364                 .event_payload = NULL,
 365         };
 366
 367         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 368         BT_ASSERT_PRE_NON_NULL(field_class, "Field class");
 369         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 370         BT_ASSERT_PRE(bt_field_class_get_type(field_class) ==
 371                 BT_FIELD_CLASS_TYPE_STRUCTURE,
 372                 "Event header field class is not a structure field class: %!+F",
 373                 field_class);
 374         resolve_ctx.packet_header =
 375                 bt_stream_class_borrow_trace_class_inline(stream_class)->packet_header_fc;
 376         resolve_ctx.packet_context = stream_class->packet_context_fc;
 377         ret = bt_resolve_field_paths(field_class, &resolve_ctx);
 378         if (ret) {
 379                 /*
 380                  * This is the only reason for which
 381                  * bt_resolve_field_paths() can fail: anything else
 382                  * would be because a precondition is not satisfied.
 383                  */
 384                 ret = BT_STREAM_CLASS_STATUS_NOMEM;
 385                 goto end;
 386         }
 387
 388         bt_field_class_make_part_of_trace_class(field_class);
 389         bt_object_put_ref(stream_class->event_header_fc);
 390         stream_class->event_header_fc = field_class;
 391         bt_object_get_no_null_check(stream_class->event_header_fc);
 392         bt_field_class_freeze(field_class);
 393         BT_LIB_LOGV("Set stream class's event header field class: %!+S",
 394                 stream_class);
 395
 396 end:
 397         return ret;
 398 }
 399
 400 const struct bt_field_class *
 401 bt_stream_class_borrow_event_common_context_field_class_const(
 402                 const struct bt_stream_class *stream_class)
 403 {
 404         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 405         return stream_class->event_common_context_fc;
 406 }
 407
 408 enum bt_stream_class_status
 409 bt_stream_class_set_event_common_context_field_class(
 410                 struct bt_stream_class *stream_class,
 411                 struct bt_field_class *field_class)
 412 {
 413         int ret;
 414         struct bt_resolve_field_path_context resolve_ctx = {
 415                 .packet_header = NULL,
 416                 .packet_context = NULL,
 417                 .event_header = NULL,
 418                 .event_common_context = field_class,
 419                 .event_specific_context = NULL,
 420                 .event_payload = NULL,
 421         };
 422
 423         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 424         BT_ASSERT_PRE_NON_NULL(field_class, "Field class");
 425         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 426         BT_ASSERT_PRE(bt_field_class_get_type(field_class) ==
 427                 BT_FIELD_CLASS_TYPE_STRUCTURE,
 428                 "Event common context field class is not a structure field class: %!+F",
 429                 field_class);
 430         resolve_ctx.packet_header =
 431                 bt_stream_class_borrow_trace_class_inline(stream_class)->packet_header_fc;
 432         resolve_ctx.packet_context = stream_class->packet_context_fc;
 433         resolve_ctx.event_header = stream_class->event_header_fc;
 434         ret = bt_resolve_field_paths(field_class, &resolve_ctx);
 435         if (ret) {
 436                 /*
 437                  * This is the only reason for which
 438                  * bt_resolve_field_paths() can fail: anything else
 439                  * would be because a precondition is not satisfied.
 440                  */
 441                 ret = BT_STREAM_CLASS_STATUS_NOMEM;
 442                 goto end;
 443         }
 444
 445         bt_field_class_make_part_of_trace_class(field_class);
 446         bt_object_put_ref(stream_class->event_common_context_fc);
 447         stream_class->event_common_context_fc = field_class;
 448         bt_object_get_no_null_check(stream_class->event_common_context_fc);
 449         bt_field_class_freeze(field_class);
 450         BT_LIB_LOGV("Set stream class's event common context field class: %!+S",
 451                 stream_class);
 452
 453 end:
 454         return ret;
 455 }
 456
 457 BT_HIDDEN
 458 void _bt_stream_class_freeze(const struct bt_stream_class *stream_class)
 459 {
 460         /* The field classes and default clock class are already frozen */
 461         BT_ASSERT(stream_class);
 462         BT_LIB_LOGD("Freezing stream class: %!+S", stream_class);
 463         ((struct bt_stream_class *) stream_class)->frozen = true;
 464 }
 465
 466 enum bt_stream_class_status bt_stream_class_set_default_clock_class(
 467                 struct bt_stream_class *stream_class,
 468                 struct bt_clock_class *clock_class)
 469 {
 470         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 471         BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
 472         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 473         bt_object_put_ref(stream_class->default_clock_class);
 474         stream_class->default_clock_class = clock_class;
 475         bt_object_get_no_null_check(stream_class->default_clock_class);
 476         bt_clock_class_freeze(clock_class);
 477         BT_LIB_LOGV("Set stream class's default clock class: %!+S",
 478                 stream_class);
 479         return BT_STREAM_CLASS_STATUS_OK;
 480 }
 481
 482 struct bt_clock_class *bt_stream_class_borrow_default_clock_class(
 483                 struct bt_stream_class *stream_class)
 484 {
 485         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 486         return stream_class->default_clock_class;
 487 }
 488
 489 const struct bt_clock_class *bt_stream_class_borrow_default_clock_class_const(
 490                 const struct bt_stream_class *stream_class)
 491 {
 492         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 493         return stream_class->default_clock_class;
 494 }
 495
 496 bt_bool bt_stream_class_assigns_automatic_event_class_id(
 497                 const struct bt_stream_class *stream_class)
 498 {
 499         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 500         return (bt_bool) stream_class->assigns_automatic_event_class_id;
 501 }
 502
 503 void bt_stream_class_set_assigns_automatic_event_class_id(
 504                 struct bt_stream_class *stream_class,
 505                 bt_bool value)
 506 {
 507         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 508         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 509         stream_class->assigns_automatic_event_class_id = (bool) value;
 510         BT_LIB_LOGV("Set stream class's automatic event class ID "
 511                 "assignment property: %!+S", stream_class);
 512 }
 513
 514 bt_bool bt_stream_class_assigns_automatic_stream_id(
 515                 const struct bt_stream_class *stream_class)
 516 {
 517         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 518         return (bt_bool) stream_class->assigns_automatic_stream_id;
 519 }
 520
 521 void bt_stream_class_set_assigns_automatic_stream_id(
 522                 struct bt_stream_class *stream_class,
 523                 bt_bool value)
 524 {
 525         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 526         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 527         stream_class->assigns_automatic_stream_id = (bool) value;
 528         BT_LIB_LOGV("Set stream class's automatic stream ID "
 529                 "assignment property: %!+S", stream_class);
 530 }
 531
 532 bt_bool bt_stream_class_packets_have_discarded_event_counter_snapshot(
 533                 const struct bt_stream_class *stream_class)
 534 {
 535         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 536         return (bt_bool) stream_class->packets_have_discarded_event_counter_snapshot;
 537 }
 538
 539 void bt_stream_class_set_packets_have_discarded_event_counter_snapshot(
 540                 struct bt_stream_class *stream_class,
 541                 bt_bool value)
 542 {
 543         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 544         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 545         stream_class->packets_have_discarded_event_counter_snapshot =
 546                 (bool) value;
 547         BT_LIB_LOGV("Set stream class's "
 548                 "\"packets have discarded event counter snapshot\" property: "
 549                 "%!+S", stream_class);
 550 }
 551
 552 bt_bool bt_stream_class_packets_have_packet_counter_snapshot(
 553                 const struct bt_stream_class *stream_class)
 554 {
 555         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 556         return (bt_bool) stream_class->packets_have_packet_counter_snapshot;
 557 }
 558
 559 void bt_stream_class_set_packets_have_packet_counter_snapshot(
 560                 struct bt_stream_class *stream_class,
 561                 bt_bool value)
 562 {
 563         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 564         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 565         stream_class->packets_have_packet_counter_snapshot =
 566                 (bool) value;
 567         BT_LIB_LOGV("Set stream class's "
 568                 "\"packets have packet counter snapshot\" property: "
 569                 "%!+S", stream_class);
 570 }
 571
 572 bt_bool bt_stream_class_packets_have_default_beginning_clock_snapshot(
 573                 const struct bt_stream_class *stream_class)
 574 {
 575         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 576         return (bt_bool) stream_class->packets_have_default_beginning_cs;
 577 }
 578
 579 void bt_stream_class_set_packets_have_default_beginning_clock_snapshot(
 580                 struct bt_stream_class *stream_class,
 581                 bt_bool value)
 582 {
 583         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 584         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 585         BT_ASSERT_PRE(!value || stream_class->default_clock_class,
 586                 "Stream class does not have a default clock class: %!+S",
 587                 stream_class);
 588         stream_class->packets_have_default_beginning_cs = (bool) value;
 589         BT_LIB_LOGV("Set stream class's "
 590                 "\"packets have default beginning clock snapshot\" property: "
 591                 "%!+S", stream_class);
 592 }
 593
 594 bt_bool bt_stream_class_packets_have_default_end_clock_snapshot(
 595                 const struct bt_stream_class *stream_class)
 596 {
 597         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 598         return (bt_bool) stream_class->packets_have_default_end_cs;
 599 }
 600
 601 void bt_stream_class_set_packets_have_default_end_clock_snapshot(
 602                 struct bt_stream_class *stream_class,
 603                 bt_bool value)
 604 {
 605         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 606         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 607         BT_ASSERT_PRE(!value || stream_class->default_clock_class,
 608                 "Stream class does not have a default clock class: %!+S",
 609                 stream_class);
 610         stream_class->packets_have_default_end_cs = (bool) value;
 611         BT_LIB_LOGV("Set stream class's "
 612                 "\"packets have default end clock snapshot\" property: "
 613                 "%!+S", stream_class);
 614 }
 615
 616 bt_bool bt_stream_class_default_clock_is_always_known(
 617                 const struct bt_stream_class *stream_class)
 618 {
 619         /* BT_CLOCK_SNAPSHOT_STATE_UNKNOWN is not supported as of 2.0 */
 620         return BT_TRUE;
 621 }
 622
 623 void bt_stream_class_get_ref(const struct bt_stream_class *stream_class)
 624 {
 625         bt_object_get_ref(stream_class);
 626 }
 627
 628 void bt_stream_class_put_ref(const struct bt_stream_class *stream_class)
 629 {
 630         bt_object_put_ref(stream_class);
 631 }