src/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 "LIB/STREAM-CLASS"
  25 #include "lib/logging.h"
  26
  27 #include "lib/assert-pre.h"
  28 #include <babeltrace2/trace-ir/trace-const.h>
  29 #include "compat/compiler.h"
  30 #include "common/align.h"
  31 #include "compat/endian.h"
  32 #include "common/assert.h"
  33 #include "lib/property.h"
  34 #include <inttypes.h>
  35 #include <stdint.h>
  36 #include <stdbool.h>
  37
  38 #include "clock-class.h"
  39 #include "event-class.h"
  40 #include "field-class.h"
  41 #include "field.h"
  42 #include "field-wrapper.h"
  43 #include "resolve-field-path.h"
  44 #include "stream-class.h"
  45 #include "trace.h"
  46 #include "utils.h"
  47 #include "lib/func-status.h"
  48
  49 #define BT_ASSERT_PRE_STREAM_CLASS_HOT(_sc) \
  50         BT_ASSERT_PRE_HOT((_sc), "Stream class", ": %!+S", (_sc))
  51
  52 static
  53 void destroy_stream_class(struct bt_object *obj)
  54 {
  55         struct bt_stream_class *stream_class = (void *) obj;
  56
  57         BT_LIB_LOGD("Destroying stream class: %!+S", stream_class);
  58         BT_LOGD_STR("Putting default clock class.");
  59         BT_OBJECT_PUT_REF_AND_RESET(stream_class->default_clock_class);
  60
  61         if (stream_class->event_classes) {
  62                 BT_LOGD_STR("Destroying event classes.");
  63                 g_ptr_array_free(stream_class->event_classes, TRUE);
  64                 stream_class->event_classes = NULL;
  65         }
  66
  67         if (stream_class->name.str) {
  68                 g_string_free(stream_class->name.str, TRUE);
  69                 stream_class->name.str = NULL;
  70                 stream_class->name.value = NULL;
  71         }
  72
  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->packet_context_field_pool);
  78         g_free(stream_class);
  79 }
  80
  81 static
  82 void free_field_wrapper(struct bt_field_wrapper *field_wrapper,
  83                 struct bt_stream_class *stream_class)
  84 {
  85         bt_field_wrapper_destroy((void *) field_wrapper);
  86 }
  87
  88 BT_ASSERT_PRE_FUNC
  89 static
  90 bool stream_class_id_is_unique(const struct bt_trace_class *tc, uint64_t id)
  91 {
  92         uint64_t i;
  93         bool is_unique = true;
  94
  95         for (i = 0; i < tc->stream_classes->len; i++) {
  96                 const struct bt_stream_class *sc =
  97                         tc->stream_classes->pdata[i];
  98
  99                 if (sc->id == id) {
 100                         is_unique = false;
 101                         goto end;
 102                 }
 103         }
 104
 105 end:
 106         return is_unique;
 107 }
 108
 109 static
 110 struct bt_stream_class *create_stream_class_with_id(
 111                 struct bt_trace_class *tc, uint64_t id)
 112 {
 113         struct bt_stream_class *stream_class = NULL;
 114         int ret;
 115
 116         BT_ASSERT(tc);
 117         BT_ASSERT_PRE(stream_class_id_is_unique(tc, id),
 118                 "Duplicate stream class ID: %![tc-]+T, id=%" PRIu64, tc, id);
 119         BT_LIB_LOGD("Creating stream class object: %![tc-]+T, id=%" PRIu64,
 120                 tc, id);
 121         stream_class = g_new0(struct bt_stream_class, 1);
 122         if (!stream_class) {
 123                 BT_LIB_LOGE_APPEND_CAUSE(
 124                         "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_LIB_LOGE_APPEND_CAUSE("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_LIB_LOGE_APPEND_CAUSE("Failed to allocate a GPtrArray.");
 145                 goto error;
 146         }
 147
 148         ret = bt_object_pool_initialize(&stream_class->packet_context_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_LIB_LOGE_APPEND_CAUSE(
 154                         "Failed to initialize packet context field pool: ret=%d",
 155                         ret);
 156                 goto error;
 157         }
 158
 159         bt_object_set_parent(&stream_class->base, &tc->base);
 160         g_ptr_array_add(tc->stream_classes, stream_class);
 161         bt_trace_class_freeze(tc);
 162         BT_LIB_LOGD("Created stream class object: %!+S", stream_class);
 163         goto end;
 164
 165 error:
 166         BT_OBJECT_PUT_REF_AND_RESET(stream_class);
 167
 168 end:
 169         return stream_class;
 170 }
 171
 172 struct bt_stream_class *bt_stream_class_create(struct bt_trace_class *tc)
 173 {
 174         BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
 175         BT_ASSERT_PRE(tc->assigns_automatic_stream_class_id,
 176                 "Trace class does not automatically assigns stream class IDs: "
 177                 "%![sc-]+T", tc);
 178         return create_stream_class_with_id(tc,
 179                 (uint64_t) tc->stream_classes->len);
 180 }
 181
 182 struct bt_stream_class *bt_stream_class_create_with_id(
 183                 struct bt_trace_class *tc, uint64_t id)
 184 {
 185         BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
 186         BT_ASSERT_PRE(!tc->assigns_automatic_stream_class_id,
 187                 "Trace class automatically assigns stream class IDs: "
 188                 "%![sc-]+T", tc);
 189         return create_stream_class_with_id(tc, id);
 190 }
 191
 192 struct bt_trace_class *bt_stream_class_borrow_trace_class(
 193                 struct bt_stream_class *stream_class)
 194 {
 195         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 196         return bt_stream_class_borrow_trace_class_inline(stream_class);
 197 }
 198
 199 const struct bt_trace_class *bt_stream_class_borrow_trace_class_const(
 200                 const struct bt_stream_class *stream_class)
 201 {
 202         return bt_stream_class_borrow_trace_class((void *) stream_class);
 203 }
 204
 205 const char *bt_stream_class_get_name(const struct bt_stream_class *stream_class)
 206 {
 207         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 208         return stream_class->name.value;
 209 }
 210
 211 enum bt_stream_class_set_name_status bt_stream_class_set_name(
 212                 struct bt_stream_class *stream_class,
 213                 const char *name)
 214 {
 215         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 216         BT_ASSERT_PRE_NON_NULL(name, "Name");
 217         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 218         g_string_assign(stream_class->name.str, name);
 219         stream_class->name.value = stream_class->name.str->str;
 220         BT_LIB_LOGD("Set stream class's name: %!+S", stream_class);
 221         return BT_FUNC_STATUS_OK;
 222 }
 223
 224 uint64_t bt_stream_class_get_id(const struct bt_stream_class *stream_class)
 225 {
 226         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 227         return stream_class->id;
 228 }
 229
 230 uint64_t bt_stream_class_get_event_class_count(
 231                 const struct bt_stream_class *stream_class)
 232 {
 233         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 234         return (uint64_t) stream_class->event_classes->len;
 235 }
 236
 237 struct bt_event_class *bt_stream_class_borrow_event_class_by_index(
 238                 struct bt_stream_class *stream_class, uint64_t index)
 239 {
 240         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 241         BT_ASSERT_PRE_VALID_INDEX(index, stream_class->event_classes->len);
 242         return g_ptr_array_index(stream_class->event_classes, index);
 243 }
 244
 245 const struct bt_event_class *
 246 bt_stream_class_borrow_event_class_by_index_const(
 247                 const struct bt_stream_class *stream_class, uint64_t index)
 248 {
 249         return bt_stream_class_borrow_event_class_by_index(
 250                 (void *) stream_class, index);
 251 }
 252
 253 struct bt_event_class *bt_stream_class_borrow_event_class_by_id(
 254                 struct bt_stream_class *stream_class, uint64_t id)
 255 {
 256         struct bt_event_class *event_class = NULL;
 257         uint64_t i;
 258
 259         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 260
 261         for (i = 0; i < stream_class->event_classes->len; i++) {
 262                 struct bt_event_class *event_class_candidate =
 263                         g_ptr_array_index(stream_class->event_classes, i);
 264
 265                 if (event_class_candidate->id == id) {
 266                         event_class = event_class_candidate;
 267                         goto end;
 268                 }
 269         }
 270
 271 end:
 272         return event_class;
 273 }
 274
 275 const struct bt_event_class *
 276 bt_stream_class_borrow_event_class_by_id_const(
 277                 const struct bt_stream_class *stream_class, uint64_t id)
 278 {
 279         return bt_stream_class_borrow_event_class_by_id(
 280                 (void *) stream_class, id);
 281 }
 282
 283 const struct bt_field_class *
 284 bt_stream_class_borrow_packet_context_field_class_const(
 285                 const struct bt_stream_class *stream_class)
 286 {
 287         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 288         return stream_class->packet_context_fc;
 289 }
 290
 291 struct bt_field_class *
 292 bt_stream_class_borrow_packet_context_field_class(
 293                 struct bt_stream_class *stream_class)
 294 {
 295         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 296         return stream_class->packet_context_fc;
 297 }
 298
 299 enum bt_stream_class_set_field_class_status
 300 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_context = field_class,
 307                 .event_common_context = NULL,
 308                 .event_specific_context = NULL,
 309                 .event_payload = NULL,
 310         };
 311
 312         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 313         BT_ASSERT_PRE(stream_class->supports_packets,
 314                 "Stream class does not support packets: %![sc-]+S",
 315                 stream_class);
 316         BT_ASSERT_PRE_NON_NULL(field_class, "Field class");
 317         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 318         BT_ASSERT_PRE(bt_field_class_get_type(field_class) ==
 319                 BT_FIELD_CLASS_TYPE_STRUCTURE,
 320                 "Packet context field class is not a structure field class: %!+F",
 321                 field_class);
 322         ret = bt_resolve_field_paths(field_class, &resolve_ctx);
 323         if (ret) {
 324                 /*
 325                  * This is the only reason for which
 326                  * bt_resolve_field_paths() can fail: anything else
 327                  * would be because a precondition is not satisfied.
 328                  */
 329                 ret = BT_FUNC_STATUS_MEMORY_ERROR;
 330                 goto end;
 331         }
 332
 333         bt_field_class_make_part_of_trace_class(field_class);
 334         bt_object_put_ref(stream_class->packet_context_fc);
 335         stream_class->packet_context_fc = field_class;
 336         bt_object_get_no_null_check(stream_class->packet_context_fc);
 337         bt_field_class_freeze(field_class);
 338         BT_LIB_LOGD("Set stream class's packet context field class: %!+S",
 339                 stream_class);
 340
 341 end:
 342         return ret;
 343 }
 344
 345 const struct bt_field_class *
 346 bt_stream_class_borrow_event_common_context_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_common_context_fc;
 351 }
 352
 353 struct bt_field_class *
 354 bt_stream_class_borrow_event_common_context_field_class(
 355                 struct bt_stream_class *stream_class)
 356 {
 357         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 358         return stream_class->event_common_context_fc;
 359 }
 360
 361 enum bt_stream_class_set_field_class_status
 362 bt_stream_class_set_event_common_context_field_class(
 363                 struct bt_stream_class *stream_class,
 364                 struct bt_field_class *field_class)
 365 {
 366         int ret;
 367         struct bt_resolve_field_path_context resolve_ctx = {
 368                 .packet_context = NULL,
 369                 .event_common_context = field_class,
 370                 .event_specific_context = NULL,
 371                 .event_payload = NULL,
 372         };
 373
 374         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 375         BT_ASSERT_PRE_NON_NULL(field_class, "Field class");
 376         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 377         BT_ASSERT_PRE(bt_field_class_get_type(field_class) ==
 378                 BT_FIELD_CLASS_TYPE_STRUCTURE,
 379                 "Event common context field class is not a structure field class: %!+F",
 380                 field_class);
 381         resolve_ctx.packet_context = stream_class->packet_context_fc;
 382         ret = bt_resolve_field_paths(field_class, &resolve_ctx);
 383         if (ret) {
 384                 /*
 385                  * This is the only reason for which
 386                  * bt_resolve_field_paths() can fail: anything else
 387                  * would be because a precondition is not satisfied.
 388                  */
 389                 ret = BT_FUNC_STATUS_MEMORY_ERROR;
 390                 goto end;
 391         }
 392
 393         bt_field_class_make_part_of_trace_class(field_class);
 394         bt_object_put_ref(stream_class->event_common_context_fc);
 395         stream_class->event_common_context_fc = field_class;
 396         bt_object_get_no_null_check(stream_class->event_common_context_fc);
 397         bt_field_class_freeze(field_class);
 398         BT_LIB_LOGD("Set stream class's event common context field class: %!+S",
 399                 stream_class);
 400
 401 end:
 402         return ret;
 403 }
 404
 405 BT_HIDDEN
 406 void _bt_stream_class_freeze(const struct bt_stream_class *stream_class)
 407 {
 408         /* The field classes and default clock class are already frozen */
 409         BT_ASSERT(stream_class);
 410         BT_LIB_LOGD("Freezing stream class: %!+S", stream_class);
 411         ((struct bt_stream_class *) stream_class)->frozen = true;
 412 }
 413
 414 enum bt_stream_class_set_default_clock_class_status
 415 bt_stream_class_set_default_clock_class(
 416                 struct bt_stream_class *stream_class,
 417                 struct bt_clock_class *clock_class)
 418 {
 419         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 420         BT_ASSERT_PRE_NON_NULL(clock_class, "Clock class");
 421         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 422         bt_object_put_ref(stream_class->default_clock_class);
 423         stream_class->default_clock_class = clock_class;
 424         bt_object_get_no_null_check(stream_class->default_clock_class);
 425         bt_clock_class_freeze(clock_class);
 426         BT_LIB_LOGD("Set stream class's default clock class: %!+S",
 427                 stream_class);
 428         return BT_FUNC_STATUS_OK;
 429 }
 430
 431 struct bt_clock_class *bt_stream_class_borrow_default_clock_class(
 432                 struct bt_stream_class *stream_class)
 433 {
 434         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 435         return stream_class->default_clock_class;
 436 }
 437
 438 const struct bt_clock_class *bt_stream_class_borrow_default_clock_class_const(
 439                 const struct bt_stream_class *stream_class)
 440 {
 441         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 442         return stream_class->default_clock_class;
 443 }
 444
 445 bt_bool bt_stream_class_assigns_automatic_event_class_id(
 446                 const struct bt_stream_class *stream_class)
 447 {
 448         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 449         return (bt_bool) stream_class->assigns_automatic_event_class_id;
 450 }
 451
 452 void bt_stream_class_set_assigns_automatic_event_class_id(
 453                 struct bt_stream_class *stream_class,
 454                 bt_bool value)
 455 {
 456         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 457         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 458         stream_class->assigns_automatic_event_class_id = (bool) value;
 459         BT_LIB_LOGD("Set stream class's automatic event class ID "
 460                 "assignment property: %!+S", stream_class);
 461 }
 462
 463 bt_bool bt_stream_class_assigns_automatic_stream_id(
 464                 const struct bt_stream_class *stream_class)
 465 {
 466         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 467         return (bt_bool) stream_class->assigns_automatic_stream_id;
 468 }
 469
 470 void bt_stream_class_set_supports_discarded_events(
 471                 struct bt_stream_class *stream_class,
 472                 bt_bool supports_discarded_events,
 473                 bt_bool with_default_clock_snapshots)
 474 {
 475         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 476         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 477         BT_ASSERT_PRE(supports_discarded_events ||
 478                 !with_default_clock_snapshots,
 479                 "Discarded events cannot have default clock snapshots when "
 480                 "not supported: %!+S", stream_class);
 481         BT_ASSERT_PRE(!with_default_clock_snapshots ||
 482                 stream_class->default_clock_class,
 483                 "Stream class has no default clock class: %!+S", stream_class);
 484         stream_class->supports_discarded_events =
 485                 (bool) supports_discarded_events;
 486         stream_class->discarded_events_have_default_clock_snapshots =
 487                 (bool) with_default_clock_snapshots;
 488         BT_LIB_LOGD("Set stream class's discarded events support property: "
 489                 "%!+S", stream_class);
 490 }
 491
 492 bt_bool bt_stream_class_supports_discarded_events(
 493                 const struct bt_stream_class *stream_class)
 494 {
 495         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 496         return (bt_bool) stream_class->supports_discarded_events;
 497 }
 498
 499 bt_bool bt_stream_class_discarded_events_have_default_clock_snapshots(
 500                 const struct bt_stream_class *stream_class)
 501 {
 502         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 503         return (bt_bool) stream_class->discarded_events_have_default_clock_snapshots;
 504 }
 505
 506 void bt_stream_class_set_supports_discarded_packets(
 507                 struct bt_stream_class *stream_class,
 508                 bt_bool supports_discarded_packets,
 509                 bt_bool with_default_clock_snapshots)
 510 {
 511         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 512         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 513         BT_ASSERT_PRE(!supports_discarded_packets ||
 514                 stream_class->supports_packets,
 515                 "Stream class does not support packets: %!+S",
 516                 stream_class);
 517         BT_ASSERT_PRE(supports_discarded_packets ||
 518                 !with_default_clock_snapshots,
 519                 "Discarded packets cannot have default clock snapshots when "
 520                 "not supported: %!+S", stream_class);
 521         BT_ASSERT_PRE(!with_default_clock_snapshots ||
 522                 stream_class->default_clock_class,
 523                 "Stream class has no default clock class: %!+S", stream_class);
 524         stream_class->supports_discarded_packets =
 525                 (bool) supports_discarded_packets;
 526         stream_class->discarded_packets_have_default_clock_snapshots =
 527                 (bool) with_default_clock_snapshots;
 528         BT_LIB_LOGD("Set stream class's discarded packets support property: "
 529                 "%!+S", stream_class);
 530 }
 531
 532 bt_bool bt_stream_class_supports_discarded_packets(
 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->supports_discarded_packets;
 537 }
 538
 539 bt_bool bt_stream_class_discarded_packets_have_default_clock_snapshots(
 540                 const struct bt_stream_class *stream_class)
 541 {
 542         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 543         return (bt_bool) stream_class->discarded_packets_have_default_clock_snapshots;
 544 }
 545
 546 void bt_stream_class_set_supports_packets(
 547                 struct bt_stream_class *stream_class,
 548                 bt_bool supports_packets,
 549                 bt_bool with_beginning_default_clock_snapshot,
 550                 bt_bool with_end_default_clock_snapshot)
 551 {
 552         bt_bool with_default_clock_snapshot =
 553                 with_beginning_default_clock_snapshot ||
 554                 with_end_default_clock_snapshot;
 555         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 556         BT_ASSERT_PRE_STREAM_CLASS_HOT(stream_class);
 557         BT_ASSERT_PRE(supports_packets ||
 558                 !with_default_clock_snapshot,
 559                 "Packets cannot have default clock snapshots when "
 560                 "not supported: %!+S", stream_class);
 561         BT_ASSERT_PRE(!with_default_clock_snapshot ||
 562                 stream_class->default_clock_class,
 563                 "Stream class has no default clock class: %!+S", stream_class);
 564         BT_ASSERT_PRE(supports_packets || !stream_class->packet_context_fc,
 565                 "Stream class already has a packet context field class: %!+S",
 566                 stream_class);
 567         BT_ASSERT_PRE(supports_packets ||
 568                 !stream_class->supports_discarded_packets,
 569                 "Stream class already supports discarded packets: %!+S",
 570                 stream_class);
 571         stream_class->supports_packets = (bool) supports_packets;
 572         stream_class->packets_have_beginning_default_clock_snapshot =
 573                 (bool) with_beginning_default_clock_snapshot;
 574         stream_class->packets_have_end_default_clock_snapshot =
 575                 (bool) with_end_default_clock_snapshot;
 576         BT_LIB_LOGD("Set stream class's packets support property: %!+S",
 577                 stream_class);
 578 }
 579
 580 bt_bool bt_stream_class_supports_packets(
 581                 const struct bt_stream_class *stream_class)
 582 {
 583         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 584         return (bt_bool) stream_class->supports_packets;
 585 }
 586
 587 bt_bool bt_stream_class_packets_have_beginning_default_clock_snapshot(
 588                 const struct bt_stream_class *stream_class)
 589 {
 590         BT_ASSERT_PRE_NON_NULL(stream_class, "Stream class");
 591         return (bt_bool) stream_class->packets_have_beginning_default_clock_snapshot;
 592 }
 593
 594 bt_bool bt_stream_class_packets_have_end_default_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_end_default_clock_snapshot;
 599 }
 600
 601 void bt_stream_class_set_assigns_automatic_stream_id(
 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         stream_class->assigns_automatic_stream_id = (bool) value;
 608         BT_LIB_LOGD("Set stream class's automatic stream ID "
 609                 "assignment property: %!+S", stream_class);
 610 }
 611
 612 void bt_stream_class_get_ref(const struct bt_stream_class *stream_class)
 613 {
 614         bt_object_get_ref(stream_class);
 615 }
 616
 617 void bt_stream_class_put_ref(const struct bt_stream_class *stream_class)
 618 {
 619         bt_object_put_ref(stream_class);
 620 }