| 1 | /* |
| 2 | * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com> |
| 3 | * Copyright 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/TRACE" |
| 25 | #include "lib/logging.h" |
| 26 | |
| 27 | #include "lib/assert-pre.h" |
| 28 | #include <babeltrace2/trace-ir/trace.h> |
| 29 | #include <babeltrace2/trace-ir/trace-const.h> |
| 30 | #include <babeltrace2/trace-ir/event-class.h> |
| 31 | #include "ctf-writer/functor.h" |
| 32 | #include "ctf-writer/clock.h" |
| 33 | #include "compat/compiler.h" |
| 34 | #include <babeltrace2/value.h> |
| 35 | #include <babeltrace2/value-const.h> |
| 36 | #include "lib/value.h" |
| 37 | #include <babeltrace2/types.h> |
| 38 | #include "compat/endian.h" |
| 39 | #include "common/assert.h" |
| 40 | #include "compat/glib.h" |
| 41 | #include <inttypes.h> |
| 42 | #include <stdint.h> |
| 43 | #include <string.h> |
| 44 | #include <stdlib.h> |
| 45 | |
| 46 | #include "attributes.h" |
| 47 | #include "clock-class.h" |
| 48 | #include "event-class.h" |
| 49 | #include "event.h" |
| 50 | #include "field-class.h" |
| 51 | #include "field-wrapper.h" |
| 52 | #include "resolve-field-path.h" |
| 53 | #include "stream-class.h" |
| 54 | #include "stream.h" |
| 55 | #include "trace-class.h" |
| 56 | #include "trace.h" |
| 57 | #include "utils.h" |
| 58 | #include "lib/func-status.h" |
| 59 | |
| 60 | struct bt_trace_destruction_listener_elem { |
| 61 | bt_trace_destruction_listener_func func; |
| 62 | void *data; |
| 63 | }; |
| 64 | |
| 65 | #define BT_ASSERT_PRE_DEV_TRACE_HOT(_trace) \ |
| 66 | BT_ASSERT_PRE_DEV_HOT((_trace), "Trace", ": %!+t", (_trace)) |
| 67 | |
| 68 | static |
| 69 | void destroy_trace(struct bt_object *obj) |
| 70 | { |
| 71 | struct bt_trace *trace = (void *) obj; |
| 72 | |
| 73 | BT_LIB_LOGD("Destroying trace object: %!+t", trace); |
| 74 | |
| 75 | /* |
| 76 | * Call destruction listener functions so that everything else |
| 77 | * still exists in the trace. |
| 78 | */ |
| 79 | if (trace->destruction_listeners) { |
| 80 | uint64_t i; |
| 81 | BT_LIB_LOGD("Calling trace destruction listener(s): %!+t", trace); |
| 82 | |
| 83 | /* |
| 84 | * The trace's reference count is 0 if we're here. Increment |
| 85 | * it to avoid a double-destroy (possibly infinitely recursive). |
| 86 | * This could happen for example if a destruction listener did |
| 87 | * bt_object_get_ref() (or anything that causes |
| 88 | * bt_object_get_ref() to be called) on the trace (ref. |
| 89 | * count goes from 0 to 1), and then bt_object_put_ref(): the |
| 90 | * reference count would go from 1 to 0 again and this function |
| 91 | * would be called again. |
| 92 | */ |
| 93 | trace->base.ref_count++; |
| 94 | |
| 95 | /* Call all the trace destruction listeners */ |
| 96 | for (i = 0; i < trace->destruction_listeners->len; i++) { |
| 97 | struct bt_trace_destruction_listener_elem elem = |
| 98 | g_array_index(trace->destruction_listeners, |
| 99 | struct bt_trace_destruction_listener_elem, i); |
| 100 | |
| 101 | if (elem.func) { |
| 102 | elem.func(trace, elem.data); |
| 103 | } |
| 104 | |
| 105 | /* |
| 106 | * The destruction listener should not have kept a |
| 107 | * reference to the trace. |
| 108 | */ |
| 109 | BT_ASSERT_PRE(trace->base.ref_count == 1, "Destruction listener kept a reference to the trace being destroyed: %![trace-]+t", trace); |
| 110 | } |
| 111 | g_array_free(trace->destruction_listeners, TRUE); |
| 112 | trace->destruction_listeners = NULL; |
| 113 | } |
| 114 | |
| 115 | if (trace->name.str) { |
| 116 | g_string_free(trace->name.str, TRUE); |
| 117 | trace->name.str = NULL; |
| 118 | trace->name.value = NULL; |
| 119 | } |
| 120 | |
| 121 | if (trace->environment) { |
| 122 | BT_LOGD_STR("Destroying environment attributes."); |
| 123 | bt_attributes_destroy(trace->environment); |
| 124 | trace->environment = NULL; |
| 125 | } |
| 126 | |
| 127 | if (trace->streams) { |
| 128 | BT_LOGD_STR("Destroying streams."); |
| 129 | g_ptr_array_free(trace->streams, TRUE); |
| 130 | trace->streams = NULL; |
| 131 | } |
| 132 | |
| 133 | if (trace->stream_classes_stream_count) { |
| 134 | g_hash_table_destroy(trace->stream_classes_stream_count); |
| 135 | trace->stream_classes_stream_count = NULL; |
| 136 | } |
| 137 | |
| 138 | BT_LOGD_STR("Putting trace's class."); |
| 139 | bt_object_put_ref(trace->class); |
| 140 | trace->class = NULL; |
| 141 | g_free(trace); |
| 142 | } |
| 143 | |
| 144 | struct bt_trace *bt_trace_create(struct bt_trace_class *tc) |
| 145 | { |
| 146 | struct bt_trace *trace = NULL; |
| 147 | |
| 148 | BT_LIB_LOGD("Creating trace object: %![tc-]+T", tc); |
| 149 | trace = g_new0(struct bt_trace, 1); |
| 150 | if (!trace) { |
| 151 | BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one trace."); |
| 152 | goto error; |
| 153 | } |
| 154 | |
| 155 | bt_object_init_shared(&trace->base, destroy_trace); |
| 156 | trace->streams = g_ptr_array_new_with_free_func( |
| 157 | (GDestroyNotify) bt_object_try_spec_release); |
| 158 | if (!trace->streams) { |
| 159 | BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one GPtrArray."); |
| 160 | goto error; |
| 161 | } |
| 162 | |
| 163 | trace->stream_classes_stream_count = g_hash_table_new(g_direct_hash, |
| 164 | g_direct_equal); |
| 165 | if (!trace->stream_classes_stream_count) { |
| 166 | BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one GHashTable."); |
| 167 | goto error; |
| 168 | } |
| 169 | |
| 170 | trace->name.str = g_string_new(NULL); |
| 171 | if (!trace->name.str) { |
| 172 | BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one GString."); |
| 173 | goto error; |
| 174 | } |
| 175 | |
| 176 | trace->environment = bt_attributes_create(); |
| 177 | if (!trace->environment) { |
| 178 | BT_LIB_LOGE_APPEND_CAUSE("Cannot create empty attributes object."); |
| 179 | goto error; |
| 180 | } |
| 181 | |
| 182 | trace->destruction_listeners = g_array_new(FALSE, TRUE, |
| 183 | sizeof(struct bt_trace_destruction_listener_elem)); |
| 184 | if (!trace->destruction_listeners) { |
| 185 | BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one GArray."); |
| 186 | goto error; |
| 187 | } |
| 188 | |
| 189 | trace->class = tc; |
| 190 | bt_object_get_no_null_check(trace->class); |
| 191 | BT_LIB_LOGD("Created trace object: %!+t", trace); |
| 192 | goto end; |
| 193 | |
| 194 | error: |
| 195 | BT_OBJECT_PUT_REF_AND_RESET(trace); |
| 196 | |
| 197 | end: |
| 198 | return trace; |
| 199 | } |
| 200 | |
| 201 | const char *bt_trace_get_name(const struct bt_trace *trace) |
| 202 | { |
| 203 | BT_ASSERT_PRE_DEV_NON_NULL(trace, "Trace"); |
| 204 | return trace->name.value; |
| 205 | } |
| 206 | |
| 207 | enum bt_trace_set_name_status bt_trace_set_name(struct bt_trace *trace, |
| 208 | const char *name) |
| 209 | { |
| 210 | BT_ASSERT_PRE_NON_NULL(trace, "Trace"); |
| 211 | BT_ASSERT_PRE_NON_NULL(name, "Name"); |
| 212 | BT_ASSERT_PRE_DEV_TRACE_HOT(trace); |
| 213 | g_string_assign(trace->name.str, name); |
| 214 | trace->name.value = trace->name.str->str; |
| 215 | BT_LIB_LOGD("Set trace's name: %!+t", trace); |
| 216 | return BT_FUNC_STATUS_OK; |
| 217 | } |
| 218 | |
| 219 | bt_uuid bt_trace_get_uuid(const struct bt_trace *trace) |
| 220 | { |
| 221 | BT_ASSERT_PRE_DEV_NON_NULL(trace, "Trace"); |
| 222 | return trace->uuid.value; |
| 223 | } |
| 224 | |
| 225 | void bt_trace_set_uuid(struct bt_trace *trace, bt_uuid uuid) |
| 226 | { |
| 227 | BT_ASSERT_PRE_NON_NULL(trace, "Trace"); |
| 228 | BT_ASSERT_PRE_NON_NULL(uuid, "UUID"); |
| 229 | BT_ASSERT_PRE_DEV_TRACE_HOT(trace); |
| 230 | bt_uuid_copy(trace->uuid.uuid, uuid); |
| 231 | trace->uuid.value = trace->uuid.uuid; |
| 232 | BT_LIB_LOGD("Set trace's UUID: %!+t", trace); |
| 233 | } |
| 234 | |
| 235 | BT_ASSERT_FUNC |
| 236 | static |
| 237 | bool trace_has_environment_entry(const struct bt_trace *trace, const char *name) |
| 238 | { |
| 239 | BT_ASSERT(trace); |
| 240 | |
| 241 | return bt_attributes_borrow_field_value_by_name( |
| 242 | trace->environment, name) != NULL; |
| 243 | } |
| 244 | |
| 245 | static |
| 246 | enum bt_trace_set_environment_entry_status set_environment_entry( |
| 247 | struct bt_trace *trace, |
| 248 | const char *name, struct bt_value *value) |
| 249 | { |
| 250 | int ret; |
| 251 | |
| 252 | BT_ASSERT(trace); |
| 253 | BT_ASSERT(name); |
| 254 | BT_ASSERT(value); |
| 255 | BT_ASSERT_PRE(!trace->frozen || |
| 256 | !trace_has_environment_entry(trace, name), |
| 257 | "Trace is frozen: cannot replace environment entry: " |
| 258 | "%![trace-]+t, entry-name=\"%s\"", trace, name); |
| 259 | ret = bt_attributes_set_field_value(trace->environment, name, |
| 260 | value); |
| 261 | if (ret) { |
| 262 | ret = BT_FUNC_STATUS_MEMORY_ERROR; |
| 263 | BT_LIB_LOGE_APPEND_CAUSE( |
| 264 | "Cannot set trace's environment entry: " |
| 265 | "%![trace-]+t, entry-name=\"%s\"", trace, name); |
| 266 | } else { |
| 267 | bt_value_freeze(value); |
| 268 | BT_LIB_LOGD("Set trace's environment entry: " |
| 269 | "%![trace-]+t, entry-name=\"%s\"", trace, name); |
| 270 | } |
| 271 | |
| 272 | return ret; |
| 273 | } |
| 274 | |
| 275 | enum bt_trace_set_environment_entry_status |
| 276 | bt_trace_set_environment_entry_string( |
| 277 | struct bt_trace *trace, const char *name, const char *value) |
| 278 | { |
| 279 | int ret; |
| 280 | struct bt_value *value_obj; |
| 281 | BT_ASSERT_PRE_NON_NULL(trace, "Trace"); |
| 282 | BT_ASSERT_PRE_NON_NULL(name, "Name"); |
| 283 | BT_ASSERT_PRE_NON_NULL(value, "Value"); |
| 284 | value_obj = bt_value_string_create_init(value); |
| 285 | if (!value_obj) { |
| 286 | BT_LIB_LOGE_APPEND_CAUSE( |
| 287 | "Cannot create a string value object."); |
| 288 | ret = -1; |
| 289 | goto end; |
| 290 | } |
| 291 | |
| 292 | /* set_environment_entry() logs errors */ |
| 293 | ret = set_environment_entry(trace, name, value_obj); |
| 294 | |
| 295 | end: |
| 296 | bt_object_put_ref(value_obj); |
| 297 | return ret; |
| 298 | } |
| 299 | |
| 300 | enum bt_trace_set_environment_entry_status |
| 301 | bt_trace_set_environment_entry_integer( |
| 302 | struct bt_trace *trace, const char *name, int64_t value) |
| 303 | { |
| 304 | int ret; |
| 305 | struct bt_value *value_obj; |
| 306 | BT_ASSERT_PRE_NON_NULL(trace, "Trace"); |
| 307 | BT_ASSERT_PRE_NON_NULL(name, "Name"); |
| 308 | value_obj = bt_value_signed_integer_create_init(value); |
| 309 | if (!value_obj) { |
| 310 | BT_LIB_LOGE_APPEND_CAUSE( |
| 311 | "Cannot create an integer value object."); |
| 312 | ret = BT_FUNC_STATUS_MEMORY_ERROR; |
| 313 | goto end; |
| 314 | } |
| 315 | |
| 316 | /* set_environment_entry() logs errors */ |
| 317 | ret = set_environment_entry(trace, name, value_obj); |
| 318 | |
| 319 | end: |
| 320 | bt_object_put_ref(value_obj); |
| 321 | return ret; |
| 322 | } |
| 323 | |
| 324 | uint64_t bt_trace_get_environment_entry_count(const struct bt_trace *trace) |
| 325 | { |
| 326 | int64_t ret; |
| 327 | |
| 328 | BT_ASSERT_PRE_DEV_NON_NULL(trace, "Trace"); |
| 329 | ret = bt_attributes_get_count(trace->environment); |
| 330 | BT_ASSERT(ret >= 0); |
| 331 | return (uint64_t) ret; |
| 332 | } |
| 333 | |
| 334 | void bt_trace_borrow_environment_entry_by_index_const( |
| 335 | const struct bt_trace *trace, uint64_t index, |
| 336 | const char **name, const struct bt_value **value) |
| 337 | { |
| 338 | BT_ASSERT_PRE_DEV_NON_NULL(trace, "Trace"); |
| 339 | BT_ASSERT_PRE_DEV_NON_NULL(name, "Name"); |
| 340 | BT_ASSERT_PRE_DEV_NON_NULL(value, "Value"); |
| 341 | BT_ASSERT_PRE_DEV_VALID_INDEX(index, |
| 342 | bt_attributes_get_count(trace->environment)); |
| 343 | *value = bt_attributes_borrow_field_value(trace->environment, index); |
| 344 | BT_ASSERT(*value); |
| 345 | *name = bt_attributes_get_field_name(trace->environment, index); |
| 346 | BT_ASSERT(*name); |
| 347 | } |
| 348 | |
| 349 | const struct bt_value *bt_trace_borrow_environment_entry_value_by_name_const( |
| 350 | const struct bt_trace *trace, const char *name) |
| 351 | { |
| 352 | BT_ASSERT_PRE_DEV_NON_NULL(trace, "Trace"); |
| 353 | BT_ASSERT_PRE_DEV_NON_NULL(name, "Name"); |
| 354 | return bt_attributes_borrow_field_value_by_name(trace->environment, |
| 355 | name); |
| 356 | } |
| 357 | |
| 358 | uint64_t bt_trace_get_stream_count(const struct bt_trace *trace) |
| 359 | { |
| 360 | BT_ASSERT_PRE_DEV_NON_NULL(trace, "Trace"); |
| 361 | return (uint64_t) trace->streams->len; |
| 362 | } |
| 363 | |
| 364 | struct bt_stream *bt_trace_borrow_stream_by_index( |
| 365 | struct bt_trace *trace, uint64_t index) |
| 366 | { |
| 367 | BT_ASSERT_PRE_DEV_NON_NULL(trace, "Trace"); |
| 368 | BT_ASSERT_PRE_DEV_VALID_INDEX(index, trace->streams->len); |
| 369 | return g_ptr_array_index(trace->streams, index); |
| 370 | } |
| 371 | |
| 372 | const struct bt_stream *bt_trace_borrow_stream_by_index_const( |
| 373 | const struct bt_trace *trace, uint64_t index) |
| 374 | { |
| 375 | return bt_trace_borrow_stream_by_index((void *) trace, index); |
| 376 | } |
| 377 | |
| 378 | struct bt_stream *bt_trace_borrow_stream_by_id(struct bt_trace *trace, |
| 379 | uint64_t id) |
| 380 | { |
| 381 | struct bt_stream *stream = NULL; |
| 382 | uint64_t i; |
| 383 | |
| 384 | BT_ASSERT_PRE_DEV_NON_NULL(trace, "Trace"); |
| 385 | |
| 386 | for (i = 0; i < trace->streams->len; i++) { |
| 387 | struct bt_stream *stream_candidate = |
| 388 | g_ptr_array_index(trace->streams, i); |
| 389 | |
| 390 | if (stream_candidate->id == id) { |
| 391 | stream = stream_candidate; |
| 392 | goto end; |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | end: |
| 397 | return stream; |
| 398 | } |
| 399 | |
| 400 | const struct bt_stream *bt_trace_borrow_stream_by_id_const( |
| 401 | const struct bt_trace *trace, uint64_t id) |
| 402 | { |
| 403 | return bt_trace_borrow_stream_by_id((void *) trace, id); |
| 404 | } |
| 405 | |
| 406 | enum bt_trace_add_listener_status bt_trace_add_destruction_listener( |
| 407 | const struct bt_trace *c_trace, |
| 408 | bt_trace_destruction_listener_func listener, |
| 409 | void *data, uint64_t *listener_id) |
| 410 | { |
| 411 | struct bt_trace *trace = (void *) c_trace; |
| 412 | uint64_t i; |
| 413 | struct bt_trace_destruction_listener_elem new_elem = { |
| 414 | .func = listener, |
| 415 | .data = data, |
| 416 | }; |
| 417 | |
| 418 | BT_ASSERT_PRE_NON_NULL(trace, "Trace"); |
| 419 | BT_ASSERT_PRE_NON_NULL(listener, "Listener"); |
| 420 | |
| 421 | /* Find the next available spot */ |
| 422 | for (i = 0; i < trace->destruction_listeners->len; i++) { |
| 423 | struct bt_trace_destruction_listener_elem elem = |
| 424 | g_array_index(trace->destruction_listeners, |
| 425 | struct bt_trace_destruction_listener_elem, i); |
| 426 | |
| 427 | if (!elem.func) { |
| 428 | break; |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | if (i == trace->destruction_listeners->len) { |
| 433 | g_array_append_val(trace->destruction_listeners, new_elem); |
| 434 | } else { |
| 435 | g_array_insert_val(trace->destruction_listeners, i, new_elem); |
| 436 | } |
| 437 | |
| 438 | if (listener_id) { |
| 439 | *listener_id = i; |
| 440 | } |
| 441 | |
| 442 | BT_LIB_LOGD("Added destruction listener: " "%![trace-]+t, " |
| 443 | "listener-id=%" PRIu64, trace, i); |
| 444 | return BT_FUNC_STATUS_OK; |
| 445 | } |
| 446 | |
| 447 | BT_ASSERT_PRE_FUNC |
| 448 | static |
| 449 | bool has_listener_id(const struct bt_trace *trace, uint64_t listener_id) |
| 450 | { |
| 451 | BT_ASSERT(listener_id < trace->destruction_listeners->len); |
| 452 | return (&g_array_index(trace->destruction_listeners, |
| 453 | struct bt_trace_destruction_listener_elem, |
| 454 | listener_id))->func != NULL; |
| 455 | } |
| 456 | |
| 457 | enum bt_trace_remove_listener_status bt_trace_remove_destruction_listener( |
| 458 | const struct bt_trace *c_trace, uint64_t listener_id) |
| 459 | { |
| 460 | struct bt_trace *trace = (void *) c_trace; |
| 461 | struct bt_trace_destruction_listener_elem *elem; |
| 462 | |
| 463 | BT_ASSERT_PRE_NON_NULL(trace, "Trace"); |
| 464 | BT_ASSERT_PRE(has_listener_id(trace, listener_id), |
| 465 | "Trace has no such trace destruction listener ID: " |
| 466 | "%![trace-]+t, %" PRIu64, trace, listener_id); |
| 467 | elem = &g_array_index(trace->destruction_listeners, |
| 468 | struct bt_trace_destruction_listener_elem, |
| 469 | listener_id); |
| 470 | BT_ASSERT(elem->func); |
| 471 | |
| 472 | elem->func = NULL; |
| 473 | elem->data = NULL; |
| 474 | BT_LIB_LOGD("Removed \"trace destruction listener: " |
| 475 | "%![trace-]+t, listener-id=%" PRIu64, |
| 476 | trace, listener_id); |
| 477 | return BT_FUNC_STATUS_OK; |
| 478 | } |
| 479 | |
| 480 | BT_HIDDEN |
| 481 | void _bt_trace_freeze(const struct bt_trace *trace) |
| 482 | { |
| 483 | BT_ASSERT(trace); |
| 484 | BT_LIB_LOGD("Freezing trace's class: %!+T", trace->class); |
| 485 | bt_trace_class_freeze(trace->class); |
| 486 | BT_LIB_LOGD("Freezing trace: %!+t", trace); |
| 487 | ((struct bt_trace *) trace)->frozen = true; |
| 488 | } |
| 489 | |
| 490 | BT_HIDDEN |
| 491 | void bt_trace_add_stream(struct bt_trace *trace, struct bt_stream *stream) |
| 492 | { |
| 493 | guint count = 0; |
| 494 | |
| 495 | bt_object_set_parent(&stream->base, &trace->base); |
| 496 | g_ptr_array_add(trace->streams, stream); |
| 497 | bt_trace_freeze(trace); |
| 498 | |
| 499 | if (bt_g_hash_table_contains(trace->stream_classes_stream_count, |
| 500 | stream->class)) { |
| 501 | count = GPOINTER_TO_UINT(g_hash_table_lookup( |
| 502 | trace->stream_classes_stream_count, stream->class)); |
| 503 | } |
| 504 | |
| 505 | g_hash_table_insert(trace->stream_classes_stream_count, |
| 506 | stream->class, GUINT_TO_POINTER(count + 1)); |
| 507 | } |
| 508 | |
| 509 | BT_HIDDEN |
| 510 | uint64_t bt_trace_get_automatic_stream_id(const struct bt_trace *trace, |
| 511 | const struct bt_stream_class *stream_class) |
| 512 | { |
| 513 | gpointer orig_key; |
| 514 | gpointer value; |
| 515 | uint64_t id = 0; |
| 516 | |
| 517 | BT_ASSERT(stream_class); |
| 518 | BT_ASSERT(trace); |
| 519 | if (g_hash_table_lookup_extended(trace->stream_classes_stream_count, |
| 520 | stream_class, &orig_key, &value)) { |
| 521 | id = (uint64_t) GPOINTER_TO_UINT(value); |
| 522 | } |
| 523 | |
| 524 | return id; |
| 525 | } |
| 526 | |
| 527 | struct bt_trace_class *bt_trace_borrow_class(struct bt_trace *trace) |
| 528 | { |
| 529 | BT_ASSERT_PRE_DEV_NON_NULL(trace, "Trace"); |
| 530 | return trace->class; |
| 531 | } |
| 532 | |
| 533 | const struct bt_trace_class *bt_trace_borrow_class_const( |
| 534 | const struct bt_trace *trace) |
| 535 | { |
| 536 | return bt_trace_borrow_class((void *) trace); |
| 537 | } |
| 538 | |
| 539 | void bt_trace_get_ref(const struct bt_trace *trace) |
| 540 | { |
| 541 | bt_object_get_ref(trace); |
| 542 | } |
| 543 | |
| 544 | void bt_trace_put_ref(const struct bt_trace *trace) |
| 545 | { |
| 546 | bt_object_put_ref(trace); |
| 547 | } |