| 1 | /* |
| 2 | * iterator.c |
| 3 | * |
| 4 | * Babeltrace Notification Iterator |
| 5 | * |
| 6 | * Copyright 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 7 | * Copyright 2017 Philippe Proulx <pproulx@efficios.com> |
| 8 | * |
| 9 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 10 | * of this software and associated documentation files (the "Software"), to deal |
| 11 | * in the Software without restriction, including without limitation the rights |
| 12 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 13 | * copies of the Software, and to permit persons to whom the Software is |
| 14 | * furnished to do so, subject to the following conditions: |
| 15 | * |
| 16 | * The above copyright notice and this permission notice shall be included in |
| 17 | * all copies or substantial portions of the Software. |
| 18 | * |
| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 22 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 23 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 24 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 25 | * SOFTWARE. |
| 26 | */ |
| 27 | |
| 28 | #define BT_LOG_TAG "NOTIF-ITER" |
| 29 | #include <babeltrace/lib-logging-internal.h> |
| 30 | |
| 31 | #include <babeltrace/compiler-internal.h> |
| 32 | #include <babeltrace/ref.h> |
| 33 | #include <babeltrace/ctf-ir/fields.h> |
| 34 | #include <babeltrace/ctf-ir/field-types.h> |
| 35 | #include <babeltrace/ctf-ir/field-types-internal.h> |
| 36 | #include <babeltrace/ctf-ir/event-internal.h> |
| 37 | #include <babeltrace/ctf-ir/packet-internal.h> |
| 38 | #include <babeltrace/ctf-ir/stream-internal.h> |
| 39 | #include <babeltrace/graph/connection.h> |
| 40 | #include <babeltrace/graph/connection-internal.h> |
| 41 | #include <babeltrace/graph/component.h> |
| 42 | #include <babeltrace/graph/component-source-internal.h> |
| 43 | #include <babeltrace/graph/component-class-internal.h> |
| 44 | #include <babeltrace/graph/notification.h> |
| 45 | #include <babeltrace/graph/notification-iterator.h> |
| 46 | #include <babeltrace/graph/notification-iterator-internal.h> |
| 47 | #include <babeltrace/graph/notification-internal.h> |
| 48 | #include <babeltrace/graph/notification-event.h> |
| 49 | #include <babeltrace/graph/notification-event-internal.h> |
| 50 | #include <babeltrace/graph/notification-packet.h> |
| 51 | #include <babeltrace/graph/notification-packet-internal.h> |
| 52 | #include <babeltrace/graph/notification-stream.h> |
| 53 | #include <babeltrace/graph/notification-stream-internal.h> |
| 54 | #include <babeltrace/graph/notification-discarded-elements-internal.h> |
| 55 | #include <babeltrace/graph/port.h> |
| 56 | #include <babeltrace/types.h> |
| 57 | #include <stdint.h> |
| 58 | #include <inttypes.h> |
| 59 | #include <stdlib.h> |
| 60 | |
| 61 | struct discarded_elements_state { |
| 62 | struct bt_ctf_clock_value *cur_begin; |
| 63 | uint64_t cur_count; |
| 64 | }; |
| 65 | |
| 66 | struct stream_state { |
| 67 | struct bt_ctf_stream *stream; /* owned by this */ |
| 68 | struct bt_ctf_packet *cur_packet; /* owned by this */ |
| 69 | struct discarded_elements_state discarded_packets_state; |
| 70 | struct discarded_elements_state discarded_events_state; |
| 71 | bt_bool is_ended; |
| 72 | }; |
| 73 | |
| 74 | enum action_type { |
| 75 | ACTION_TYPE_PUSH_NOTIF, |
| 76 | ACTION_TYPE_MAP_PORT_TO_COMP_IN_STREAM, |
| 77 | ACTION_TYPE_ADD_STREAM_STATE, |
| 78 | ACTION_TYPE_SET_STREAM_STATE_IS_ENDED, |
| 79 | ACTION_TYPE_SET_STREAM_STATE_CUR_PACKET, |
| 80 | ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_PACKETS, |
| 81 | ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_EVENTS, |
| 82 | }; |
| 83 | |
| 84 | struct action { |
| 85 | enum action_type type; |
| 86 | union { |
| 87 | /* ACTION_TYPE_PUSH_NOTIF */ |
| 88 | struct { |
| 89 | struct bt_notification *notif; /* owned by this */ |
| 90 | } push_notif; |
| 91 | |
| 92 | /* ACTION_TYPE_MAP_PORT_TO_COMP_IN_STREAM */ |
| 93 | struct { |
| 94 | struct bt_ctf_stream *stream; /* owned by this */ |
| 95 | struct bt_component *component; /* owned by this */ |
| 96 | struct bt_port *port; /* owned by this */ |
| 97 | } map_port_to_comp_in_stream; |
| 98 | |
| 99 | /* ACTION_TYPE_ADD_STREAM_STATE */ |
| 100 | struct { |
| 101 | struct bt_ctf_stream *stream; /* owned by this */ |
| 102 | struct stream_state *stream_state; /* owned by this */ |
| 103 | } add_stream_state; |
| 104 | |
| 105 | /* ACTION_TYPE_SET_STREAM_STATE_IS_ENDED */ |
| 106 | struct { |
| 107 | struct stream_state *stream_state; /* weak */ |
| 108 | } set_stream_state_is_ended; |
| 109 | |
| 110 | /* ACTION_TYPE_SET_STREAM_STATE_CUR_PACKET */ |
| 111 | struct { |
| 112 | struct stream_state *stream_state; /* weak */ |
| 113 | struct bt_ctf_packet *packet; /* owned by this */ |
| 114 | } set_stream_state_cur_packet; |
| 115 | |
| 116 | /* ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_PACKETS */ |
| 117 | /* ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_EVENTS */ |
| 118 | struct { |
| 119 | struct stream_state *stream_state; /* weak */ |
| 120 | struct bt_ctf_clock_value *cur_begin; /* owned by this */ |
| 121 | uint64_t cur_count; |
| 122 | } update_stream_state_discarded_elements; |
| 123 | } payload; |
| 124 | }; |
| 125 | |
| 126 | static |
| 127 | void stream_destroy_listener(struct bt_ctf_stream *stream, void *data) |
| 128 | { |
| 129 | struct bt_notification_iterator *iterator = data; |
| 130 | |
| 131 | /* Remove associated stream state */ |
| 132 | g_hash_table_remove(iterator->stream_states, stream); |
| 133 | } |
| 134 | |
| 135 | static |
| 136 | void destroy_stream_state(struct stream_state *stream_state) |
| 137 | { |
| 138 | if (!stream_state) { |
| 139 | return; |
| 140 | } |
| 141 | |
| 142 | BT_LOGV("Destroying stream state: stream-state-addr=%p", stream_state); |
| 143 | BT_LOGV_STR("Putting stream state's current packet."); |
| 144 | bt_put(stream_state->cur_packet); |
| 145 | BT_LOGV_STR("Putting stream state's stream."); |
| 146 | bt_put(stream_state->stream); |
| 147 | bt_put(stream_state->discarded_packets_state.cur_begin); |
| 148 | bt_put(stream_state->discarded_events_state.cur_begin); |
| 149 | g_free(stream_state); |
| 150 | } |
| 151 | |
| 152 | static |
| 153 | void destroy_action(struct action *action) |
| 154 | { |
| 155 | assert(action); |
| 156 | |
| 157 | switch (action->type) { |
| 158 | case ACTION_TYPE_PUSH_NOTIF: |
| 159 | BT_PUT(action->payload.push_notif.notif); |
| 160 | break; |
| 161 | case ACTION_TYPE_MAP_PORT_TO_COMP_IN_STREAM: |
| 162 | BT_PUT(action->payload.map_port_to_comp_in_stream.stream); |
| 163 | BT_PUT(action->payload.map_port_to_comp_in_stream.component); |
| 164 | BT_PUT(action->payload.map_port_to_comp_in_stream.port); |
| 165 | break; |
| 166 | case ACTION_TYPE_ADD_STREAM_STATE: |
| 167 | BT_PUT(action->payload.add_stream_state.stream); |
| 168 | destroy_stream_state( |
| 169 | action->payload.add_stream_state.stream_state); |
| 170 | action->payload.add_stream_state.stream_state = NULL; |
| 171 | break; |
| 172 | case ACTION_TYPE_SET_STREAM_STATE_CUR_PACKET: |
| 173 | BT_PUT(action->payload.set_stream_state_cur_packet.packet); |
| 174 | break; |
| 175 | case ACTION_TYPE_SET_STREAM_STATE_IS_ENDED: |
| 176 | break; |
| 177 | case ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_PACKETS: |
| 178 | case ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_EVENTS: |
| 179 | BT_PUT(action->payload.update_stream_state_discarded_elements.cur_begin); |
| 180 | break; |
| 181 | default: |
| 182 | BT_LOGF("Unexpected action's type: type=%d", action->type); |
| 183 | abort(); |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | static |
| 188 | void add_action(struct bt_notification_iterator *iterator, |
| 189 | struct action *action) |
| 190 | { |
| 191 | g_array_append_val(iterator->actions, *action); |
| 192 | } |
| 193 | |
| 194 | static |
| 195 | void clear_actions(struct bt_notification_iterator *iterator) |
| 196 | { |
| 197 | size_t i; |
| 198 | |
| 199 | for (i = 0; i < iterator->actions->len; i++) { |
| 200 | struct action *action = &g_array_index(iterator->actions, |
| 201 | struct action, i); |
| 202 | |
| 203 | destroy_action(action); |
| 204 | } |
| 205 | |
| 206 | g_array_set_size(iterator->actions, 0); |
| 207 | } |
| 208 | |
| 209 | static inline |
| 210 | const char *action_type_string(enum action_type type) |
| 211 | { |
| 212 | switch (type) { |
| 213 | case ACTION_TYPE_PUSH_NOTIF: |
| 214 | return "ACTION_TYPE_PUSH_NOTIF"; |
| 215 | case ACTION_TYPE_MAP_PORT_TO_COMP_IN_STREAM: |
| 216 | return "ACTION_TYPE_MAP_PORT_TO_COMP_IN_STREAM"; |
| 217 | case ACTION_TYPE_ADD_STREAM_STATE: |
| 218 | return "ACTION_TYPE_ADD_STREAM_STATE"; |
| 219 | case ACTION_TYPE_SET_STREAM_STATE_IS_ENDED: |
| 220 | return "ACTION_TYPE_SET_STREAM_STATE_IS_ENDED"; |
| 221 | case ACTION_TYPE_SET_STREAM_STATE_CUR_PACKET: |
| 222 | return "ACTION_TYPE_SET_STREAM_STATE_CUR_PACKET"; |
| 223 | case ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_PACKETS: |
| 224 | return "ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_PACKETS"; |
| 225 | case ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_EVENTS: |
| 226 | return "ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_EVENTS"; |
| 227 | default: |
| 228 | return "(unknown)"; |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | static |
| 233 | void apply_actions(struct bt_notification_iterator *iterator) |
| 234 | { |
| 235 | size_t i; |
| 236 | |
| 237 | BT_LOGV("Applying notification's iterator current actions: " |
| 238 | "count=%u", iterator->actions->len); |
| 239 | |
| 240 | for (i = 0; i < iterator->actions->len; i++) { |
| 241 | struct action *action = &g_array_index(iterator->actions, |
| 242 | struct action, i); |
| 243 | |
| 244 | BT_LOGV("Applying action: index=%zu, type=%s", |
| 245 | i, action_type_string(action->type)); |
| 246 | |
| 247 | switch (action->type) { |
| 248 | case ACTION_TYPE_PUSH_NOTIF: |
| 249 | /* Move notification to queue */ |
| 250 | g_queue_push_head(iterator->queue, |
| 251 | action->payload.push_notif.notif); |
| 252 | bt_notification_freeze( |
| 253 | action->payload.push_notif.notif); |
| 254 | action->payload.push_notif.notif = NULL; |
| 255 | break; |
| 256 | case ACTION_TYPE_MAP_PORT_TO_COMP_IN_STREAM: |
| 257 | bt_ctf_stream_map_component_to_port( |
| 258 | action->payload.map_port_to_comp_in_stream.stream, |
| 259 | action->payload.map_port_to_comp_in_stream.component, |
| 260 | action->payload.map_port_to_comp_in_stream.port); |
| 261 | break; |
| 262 | case ACTION_TYPE_ADD_STREAM_STATE: |
| 263 | /* Move stream state to hash table */ |
| 264 | g_hash_table_insert(iterator->stream_states, |
| 265 | action->payload.add_stream_state.stream, |
| 266 | action->payload.add_stream_state.stream_state); |
| 267 | |
| 268 | action->payload.add_stream_state.stream_state = NULL; |
| 269 | break; |
| 270 | case ACTION_TYPE_SET_STREAM_STATE_IS_ENDED: |
| 271 | /* |
| 272 | * We know that this stream is ended. We need to |
| 273 | * remember this as long as the stream exists to |
| 274 | * enforce that the same stream does not end |
| 275 | * twice. |
| 276 | * |
| 277 | * Here we add a destroy listener to the stream |
| 278 | * which we put after (becomes weak as the hash |
| 279 | * table key). If we were the last object to own |
| 280 | * this stream, the destroy listener is called |
| 281 | * when we call bt_put() which removes this |
| 282 | * stream state completely. This is important |
| 283 | * because the memory used by this stream object |
| 284 | * could be reused for another stream, and they |
| 285 | * must have different states. |
| 286 | */ |
| 287 | bt_ctf_stream_add_destroy_listener( |
| 288 | action->payload.set_stream_state_is_ended.stream_state->stream, |
| 289 | stream_destroy_listener, iterator); |
| 290 | action->payload.set_stream_state_is_ended.stream_state->is_ended = BT_TRUE; |
| 291 | BT_PUT(action->payload.set_stream_state_is_ended.stream_state->stream); |
| 292 | break; |
| 293 | case ACTION_TYPE_SET_STREAM_STATE_CUR_PACKET: |
| 294 | /* Move packet to stream state's current packet */ |
| 295 | BT_MOVE(action->payload.set_stream_state_cur_packet.stream_state->cur_packet, |
| 296 | action->payload.set_stream_state_cur_packet.packet); |
| 297 | break; |
| 298 | case ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_PACKETS: |
| 299 | case ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_EVENTS: |
| 300 | { |
| 301 | struct discarded_elements_state *state; |
| 302 | |
| 303 | if (action->type == ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_PACKETS) { |
| 304 | state = &action->payload.update_stream_state_discarded_elements.stream_state->discarded_packets_state; |
| 305 | } else { |
| 306 | state = &action->payload.update_stream_state_discarded_elements.stream_state->discarded_events_state; |
| 307 | } |
| 308 | |
| 309 | BT_MOVE(state->cur_begin, |
| 310 | action->payload.update_stream_state_discarded_elements.cur_begin); |
| 311 | state->cur_count = action->payload.update_stream_state_discarded_elements.cur_count; |
| 312 | break; |
| 313 | } |
| 314 | default: |
| 315 | BT_LOGF("Unexpected action's type: type=%d", |
| 316 | action->type); |
| 317 | abort(); |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | clear_actions(iterator); |
| 322 | } |
| 323 | |
| 324 | static |
| 325 | struct stream_state *create_stream_state(struct bt_ctf_stream *stream) |
| 326 | { |
| 327 | struct stream_state *stream_state = g_new0(struct stream_state, 1); |
| 328 | |
| 329 | if (!stream_state) { |
| 330 | BT_LOGE_STR("Failed to allocate one stream state."); |
| 331 | goto end; |
| 332 | } |
| 333 | |
| 334 | /* |
| 335 | * We keep a reference to the stream until we know it's ended |
| 336 | * because we need to be able to create an automatic "stream |
| 337 | * end" notification when the user's "next" method returns |
| 338 | * BT_NOTIFICATION_ITERATOR_STATUS_END. |
| 339 | * |
| 340 | * We put this reference when the stream is marked as ended. |
| 341 | */ |
| 342 | stream_state->stream = bt_get(stream); |
| 343 | BT_LOGV("Created stream state: stream-addr=%p, stream-name=\"%s\", " |
| 344 | "stream-state-addr=%p", |
| 345 | stream, bt_ctf_stream_get_name(stream), stream_state); |
| 346 | |
| 347 | end: |
| 348 | return stream_state; |
| 349 | } |
| 350 | |
| 351 | static |
| 352 | void bt_notification_iterator_destroy(struct bt_object *obj) |
| 353 | { |
| 354 | struct bt_notification_iterator *iterator; |
| 355 | |
| 356 | assert(obj); |
| 357 | |
| 358 | /* |
| 359 | * The notification iterator's reference count is 0 if we're |
| 360 | * here. Increment it to avoid a double-destroy (possibly |
| 361 | * infinitely recursive). This could happen for example if the |
| 362 | * notification iterator's finalization function does bt_get() |
| 363 | * (or anything that causes bt_get() to be called) on itself |
| 364 | * (ref. count goes from 0 to 1), and then bt_put(): the |
| 365 | * reference count would go from 1 to 0 again and this function |
| 366 | * would be called again. |
| 367 | */ |
| 368 | obj->ref_count.count++; |
| 369 | iterator = container_of(obj, struct bt_notification_iterator, base); |
| 370 | BT_LOGD("Destroying notification iterator object: addr=%p", |
| 371 | iterator); |
| 372 | bt_notification_iterator_finalize(iterator); |
| 373 | |
| 374 | if (iterator->queue) { |
| 375 | struct bt_notification *notif; |
| 376 | |
| 377 | BT_LOGD("Putting notifications in queue."); |
| 378 | |
| 379 | while ((notif = g_queue_pop_tail(iterator->queue))) { |
| 380 | bt_put(notif); |
| 381 | } |
| 382 | |
| 383 | g_queue_free(iterator->queue); |
| 384 | } |
| 385 | |
| 386 | if (iterator->stream_states) { |
| 387 | /* |
| 388 | * Remove our destroy listener from each stream which |
| 389 | * has a state in this iterator. Otherwise the destroy |
| 390 | * listener would be called with an invalid/other |
| 391 | * notification iterator object. |
| 392 | */ |
| 393 | GHashTableIter ht_iter; |
| 394 | gpointer stream_gptr, stream_state_gptr; |
| 395 | |
| 396 | g_hash_table_iter_init(&ht_iter, iterator->stream_states); |
| 397 | |
| 398 | while (g_hash_table_iter_next(&ht_iter, &stream_gptr, &stream_state_gptr)) { |
| 399 | assert(stream_gptr); |
| 400 | |
| 401 | BT_LOGD_STR("Removing stream's destroy listener for notification iterator."); |
| 402 | bt_ctf_stream_remove_destroy_listener( |
| 403 | (void *) stream_gptr, stream_destroy_listener, |
| 404 | iterator); |
| 405 | } |
| 406 | |
| 407 | g_hash_table_destroy(iterator->stream_states); |
| 408 | } |
| 409 | |
| 410 | if (iterator->actions) { |
| 411 | g_array_free(iterator->actions, TRUE); |
| 412 | } |
| 413 | |
| 414 | if (iterator->connection) { |
| 415 | /* |
| 416 | * Remove ourself from the originating connection so |
| 417 | * that it does not try to finalize a dangling pointer |
| 418 | * later. |
| 419 | */ |
| 420 | bt_connection_remove_iterator(iterator->connection, iterator); |
| 421 | } |
| 422 | |
| 423 | BT_LOGD_STR("Putting current notification."); |
| 424 | bt_put(iterator->current_notification); |
| 425 | g_free(iterator); |
| 426 | } |
| 427 | |
| 428 | BT_HIDDEN |
| 429 | void bt_notification_iterator_finalize( |
| 430 | struct bt_notification_iterator *iterator) |
| 431 | { |
| 432 | struct bt_component_class *comp_class = NULL; |
| 433 | bt_component_class_notification_iterator_finalize_method |
| 434 | finalize_method = NULL; |
| 435 | |
| 436 | assert(iterator); |
| 437 | |
| 438 | switch (iterator->state) { |
| 439 | case BT_NOTIFICATION_ITERATOR_STATE_FINALIZED: |
| 440 | case BT_NOTIFICATION_ITERATOR_STATE_FINALIZED_AND_ENDED: |
| 441 | /* Already finalized */ |
| 442 | BT_LOGD("Not finalizing notification iterator: already finalized: " |
| 443 | "addr=%p", iterator); |
| 444 | return; |
| 445 | default: |
| 446 | break; |
| 447 | } |
| 448 | |
| 449 | BT_LOGD("Finalizing notification iterator: addr=%p", iterator); |
| 450 | |
| 451 | if (iterator->state == BT_NOTIFICATION_ITERATOR_STATE_ENDED) { |
| 452 | BT_LOGD("Updating notification iterator's state: " |
| 453 | "new-state=BT_NOTIFICATION_ITERATOR_STATE_FINALIZED_AND_ENDED"); |
| 454 | iterator->state = BT_NOTIFICATION_ITERATOR_STATE_FINALIZED_AND_ENDED; |
| 455 | } else { |
| 456 | BT_LOGD("Updating notification iterator's state: " |
| 457 | "new-state=BT_NOTIFICATION_ITERATOR_STATE_FINALIZED"); |
| 458 | iterator->state = BT_NOTIFICATION_ITERATOR_STATE_FINALIZED; |
| 459 | } |
| 460 | |
| 461 | assert(iterator->upstream_component); |
| 462 | comp_class = iterator->upstream_component->class; |
| 463 | |
| 464 | /* Call user-defined destroy method */ |
| 465 | switch (comp_class->type) { |
| 466 | case BT_COMPONENT_CLASS_TYPE_SOURCE: |
| 467 | { |
| 468 | struct bt_component_class_source *source_class; |
| 469 | |
| 470 | source_class = container_of(comp_class, struct bt_component_class_source, parent); |
| 471 | finalize_method = source_class->methods.iterator.finalize; |
| 472 | break; |
| 473 | } |
| 474 | case BT_COMPONENT_CLASS_TYPE_FILTER: |
| 475 | { |
| 476 | struct bt_component_class_filter *filter_class; |
| 477 | |
| 478 | filter_class = container_of(comp_class, struct bt_component_class_filter, parent); |
| 479 | finalize_method = filter_class->methods.iterator.finalize; |
| 480 | break; |
| 481 | } |
| 482 | default: |
| 483 | /* Unreachable */ |
| 484 | abort(); |
| 485 | } |
| 486 | |
| 487 | if (finalize_method) { |
| 488 | BT_LOGD("Calling user's finalization method: addr=%p", |
| 489 | iterator); |
| 490 | finalize_method( |
| 491 | bt_private_notification_iterator_from_notification_iterator(iterator)); |
| 492 | } |
| 493 | |
| 494 | iterator->upstream_component = NULL; |
| 495 | iterator->upstream_port = NULL; |
| 496 | BT_LOGD("Finalized notification iterator: addr=%p", iterator); |
| 497 | } |
| 498 | |
| 499 | BT_HIDDEN |
| 500 | void bt_notification_iterator_set_connection( |
| 501 | struct bt_notification_iterator *iterator, |
| 502 | struct bt_connection *connection) |
| 503 | { |
| 504 | assert(iterator); |
| 505 | iterator->connection = connection; |
| 506 | BT_LOGV("Set notification iterator's connection: " |
| 507 | "iter-addr=%p, conn-addr=%p", iterator, connection); |
| 508 | } |
| 509 | |
| 510 | static |
| 511 | int create_subscription_mask_from_notification_types( |
| 512 | struct bt_notification_iterator *iterator, |
| 513 | const enum bt_notification_type *notif_types) |
| 514 | { |
| 515 | const enum bt_notification_type *notif_type; |
| 516 | int ret = 0; |
| 517 | |
| 518 | assert(notif_types); |
| 519 | iterator->subscription_mask = 0; |
| 520 | |
| 521 | for (notif_type = notif_types; |
| 522 | *notif_type != BT_NOTIFICATION_TYPE_SENTINEL; |
| 523 | notif_type++) { |
| 524 | switch (*notif_type) { |
| 525 | case BT_NOTIFICATION_TYPE_ALL: |
| 526 | iterator->subscription_mask |= |
| 527 | BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_EVENT | |
| 528 | BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_INACTIVITY | |
| 529 | BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_STREAM_BEGIN | |
| 530 | BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_STREAM_END | |
| 531 | BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_PACKET_BEGIN | |
| 532 | BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_PACKET_END | |
| 533 | BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_DISCARDED_EVENTS | |
| 534 | BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_DISCARDED_PACKETS; |
| 535 | break; |
| 536 | case BT_NOTIFICATION_TYPE_EVENT: |
| 537 | iterator->subscription_mask |= BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_EVENT; |
| 538 | break; |
| 539 | case BT_NOTIFICATION_TYPE_INACTIVITY: |
| 540 | iterator->subscription_mask |= BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_INACTIVITY; |
| 541 | break; |
| 542 | case BT_NOTIFICATION_TYPE_STREAM_BEGIN: |
| 543 | iterator->subscription_mask |= BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_STREAM_BEGIN; |
| 544 | break; |
| 545 | case BT_NOTIFICATION_TYPE_STREAM_END: |
| 546 | iterator->subscription_mask |= BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_STREAM_END; |
| 547 | break; |
| 548 | case BT_NOTIFICATION_TYPE_PACKET_BEGIN: |
| 549 | iterator->subscription_mask |= BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_PACKET_BEGIN; |
| 550 | break; |
| 551 | case BT_NOTIFICATION_TYPE_PACKET_END: |
| 552 | iterator->subscription_mask |= BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_PACKET_END; |
| 553 | break; |
| 554 | case BT_NOTIFICATION_TYPE_DISCARDED_EVENTS: |
| 555 | iterator->subscription_mask |= BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_DISCARDED_EVENTS; |
| 556 | break; |
| 557 | case BT_NOTIFICATION_TYPE_DISCARDED_PACKETS: |
| 558 | iterator->subscription_mask |= BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_DISCARDED_PACKETS; |
| 559 | break; |
| 560 | default: |
| 561 | ret = -1; |
| 562 | goto end; |
| 563 | } |
| 564 | |
| 565 | BT_LOGV("Added notification type to subscription mask: " |
| 566 | "type=%s, mask=%x", |
| 567 | bt_notification_type_string(*notif_type), |
| 568 | iterator->subscription_mask); |
| 569 | } |
| 570 | |
| 571 | end: |
| 572 | return ret; |
| 573 | } |
| 574 | |
| 575 | BT_HIDDEN |
| 576 | enum bt_connection_status bt_notification_iterator_create( |
| 577 | struct bt_component *upstream_comp, |
| 578 | struct bt_port *upstream_port, |
| 579 | const enum bt_notification_type *notification_types, |
| 580 | struct bt_connection *connection, |
| 581 | struct bt_notification_iterator **user_iterator) |
| 582 | { |
| 583 | enum bt_connection_status status = BT_CONNECTION_STATUS_OK; |
| 584 | enum bt_component_class_type type; |
| 585 | struct bt_notification_iterator *iterator = NULL; |
| 586 | |
| 587 | assert(upstream_comp); |
| 588 | assert(upstream_port); |
| 589 | assert(notification_types); |
| 590 | assert(bt_port_is_connected(upstream_port)); |
| 591 | assert(user_iterator); |
| 592 | BT_LOGD("Creating notification iterator: " |
| 593 | "upstream-comp-addr=%p, upstream-comp-name=\"%s\", " |
| 594 | "upstream-port-addr=%p, upstream-port-name=\"%s\", " |
| 595 | "conn-addr=%p", |
| 596 | upstream_comp, bt_component_get_name(upstream_comp), |
| 597 | upstream_port, bt_port_get_name(upstream_port), |
| 598 | connection); |
| 599 | type = bt_component_get_class_type(upstream_comp); |
| 600 | assert(type == BT_COMPONENT_CLASS_TYPE_SOURCE || |
| 601 | type == BT_COMPONENT_CLASS_TYPE_FILTER); |
| 602 | iterator = g_new0(struct bt_notification_iterator, 1); |
| 603 | if (!iterator) { |
| 604 | BT_LOGE_STR("Failed to allocate one notification iterator."); |
| 605 | status = BT_CONNECTION_STATUS_NOMEM; |
| 606 | goto end; |
| 607 | } |
| 608 | |
| 609 | bt_object_init(iterator, bt_notification_iterator_destroy); |
| 610 | |
| 611 | if (create_subscription_mask_from_notification_types(iterator, |
| 612 | notification_types)) { |
| 613 | BT_LOGW_STR("Cannot create subscription mask from notification types."); |
| 614 | status = BT_CONNECTION_STATUS_INVALID; |
| 615 | goto end; |
| 616 | } |
| 617 | |
| 618 | iterator->stream_states = g_hash_table_new_full(g_direct_hash, |
| 619 | g_direct_equal, NULL, (GDestroyNotify) destroy_stream_state); |
| 620 | if (!iterator->stream_states) { |
| 621 | BT_LOGE_STR("Failed to allocate a GHashTable."); |
| 622 | status = BT_CONNECTION_STATUS_NOMEM; |
| 623 | goto end; |
| 624 | } |
| 625 | |
| 626 | iterator->queue = g_queue_new(); |
| 627 | if (!iterator->queue) { |
| 628 | BT_LOGE_STR("Failed to allocate a GQueue."); |
| 629 | status = BT_CONNECTION_STATUS_NOMEM; |
| 630 | goto end; |
| 631 | } |
| 632 | |
| 633 | iterator->actions = g_array_new(FALSE, FALSE, sizeof(struct action)); |
| 634 | if (!iterator->actions) { |
| 635 | BT_LOGE_STR("Failed to allocate a GArray."); |
| 636 | status = BT_CONNECTION_STATUS_NOMEM; |
| 637 | goto end; |
| 638 | } |
| 639 | |
| 640 | iterator->upstream_component = upstream_comp; |
| 641 | iterator->upstream_port = upstream_port; |
| 642 | iterator->connection = connection; |
| 643 | iterator->state = BT_NOTIFICATION_ITERATOR_STATE_ACTIVE; |
| 644 | BT_LOGD("Created notification iterator: " |
| 645 | "upstream-comp-addr=%p, upstream-comp-name=\"%s\", " |
| 646 | "upstream-port-addr=%p, upstream-port-name=\"%s\", " |
| 647 | "conn-addr=%p, iter-addr=%p", |
| 648 | upstream_comp, bt_component_get_name(upstream_comp), |
| 649 | upstream_port, bt_port_get_name(upstream_port), |
| 650 | connection, iterator); |
| 651 | |
| 652 | /* Move reference to user */ |
| 653 | *user_iterator = iterator; |
| 654 | iterator = NULL; |
| 655 | |
| 656 | end: |
| 657 | bt_put(iterator); |
| 658 | return status; |
| 659 | } |
| 660 | |
| 661 | void *bt_private_notification_iterator_get_user_data( |
| 662 | struct bt_private_notification_iterator *private_iterator) |
| 663 | { |
| 664 | struct bt_notification_iterator *iterator = |
| 665 | bt_notification_iterator_from_private(private_iterator); |
| 666 | |
| 667 | return iterator ? iterator->user_data : NULL; |
| 668 | } |
| 669 | |
| 670 | enum bt_notification_iterator_status |
| 671 | bt_private_notification_iterator_set_user_data( |
| 672 | struct bt_private_notification_iterator *private_iterator, |
| 673 | void *data) |
| 674 | { |
| 675 | enum bt_notification_iterator_status ret = |
| 676 | BT_NOTIFICATION_ITERATOR_STATUS_OK; |
| 677 | struct bt_notification_iterator *iterator = |
| 678 | bt_notification_iterator_from_private(private_iterator); |
| 679 | |
| 680 | if (!iterator) { |
| 681 | BT_LOGW_STR("Invalid parameter: notification iterator is NULL."); |
| 682 | ret = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; |
| 683 | goto end; |
| 684 | } |
| 685 | |
| 686 | iterator->user_data = data; |
| 687 | BT_LOGV("Set notification iterator's user data: " |
| 688 | "iter-addr=%p, user-data-addr=%p", iterator, data); |
| 689 | |
| 690 | end: |
| 691 | return ret; |
| 692 | } |
| 693 | |
| 694 | struct bt_notification *bt_notification_iterator_get_notification( |
| 695 | struct bt_notification_iterator *iterator) |
| 696 | { |
| 697 | struct bt_notification *notification = NULL; |
| 698 | |
| 699 | if (!iterator) { |
| 700 | BT_LOGW_STR("Invalid parameter: notification iterator is NULL."); |
| 701 | goto end; |
| 702 | } |
| 703 | |
| 704 | notification = bt_get(iterator->current_notification); |
| 705 | |
| 706 | end: |
| 707 | return notification; |
| 708 | } |
| 709 | |
| 710 | static |
| 711 | enum bt_notification_iterator_notif_type |
| 712 | bt_notification_iterator_notif_type_from_notif_type( |
| 713 | enum bt_notification_type notif_type) |
| 714 | { |
| 715 | enum bt_notification_iterator_notif_type iter_notif_type; |
| 716 | |
| 717 | switch (notif_type) { |
| 718 | case BT_NOTIFICATION_TYPE_EVENT: |
| 719 | iter_notif_type = BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_EVENT; |
| 720 | break; |
| 721 | case BT_NOTIFICATION_TYPE_INACTIVITY: |
| 722 | iter_notif_type = BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_INACTIVITY; |
| 723 | break; |
| 724 | case BT_NOTIFICATION_TYPE_STREAM_BEGIN: |
| 725 | iter_notif_type = BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_STREAM_BEGIN; |
| 726 | break; |
| 727 | case BT_NOTIFICATION_TYPE_STREAM_END: |
| 728 | iter_notif_type = BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_STREAM_END; |
| 729 | break; |
| 730 | case BT_NOTIFICATION_TYPE_PACKET_BEGIN: |
| 731 | iter_notif_type = BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_PACKET_BEGIN; |
| 732 | break; |
| 733 | case BT_NOTIFICATION_TYPE_PACKET_END: |
| 734 | iter_notif_type = BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_PACKET_END; |
| 735 | break; |
| 736 | case BT_NOTIFICATION_TYPE_DISCARDED_EVENTS: |
| 737 | iter_notif_type = BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_DISCARDED_EVENTS; |
| 738 | break; |
| 739 | case BT_NOTIFICATION_TYPE_DISCARDED_PACKETS: |
| 740 | iter_notif_type = BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_DISCARDED_PACKETS; |
| 741 | break; |
| 742 | default: |
| 743 | abort(); |
| 744 | } |
| 745 | |
| 746 | return iter_notif_type; |
| 747 | } |
| 748 | |
| 749 | static |
| 750 | bt_bool validate_notification(struct bt_notification_iterator *iterator, |
| 751 | struct bt_notification *notif, |
| 752 | struct bt_ctf_stream *notif_stream, |
| 753 | struct bt_ctf_packet *notif_packet) |
| 754 | { |
| 755 | bt_bool is_valid = BT_TRUE; |
| 756 | struct stream_state *stream_state; |
| 757 | struct bt_port *stream_comp_cur_port; |
| 758 | |
| 759 | assert(notif_stream); |
| 760 | stream_comp_cur_port = |
| 761 | bt_ctf_stream_port_for_component(notif_stream, |
| 762 | iterator->upstream_component); |
| 763 | if (!stream_comp_cur_port) { |
| 764 | /* |
| 765 | * This is the first time this notification iterator |
| 766 | * bumps into this stream. Add an action to map the |
| 767 | * iterator's upstream component to the iterator's |
| 768 | * upstream port in this stream. |
| 769 | */ |
| 770 | struct action action = { |
| 771 | .type = ACTION_TYPE_MAP_PORT_TO_COMP_IN_STREAM, |
| 772 | .payload.map_port_to_comp_in_stream = { |
| 773 | .stream = bt_get(notif_stream), |
| 774 | .component = bt_get(iterator->upstream_component), |
| 775 | .port = bt_get(iterator->upstream_port), |
| 776 | }, |
| 777 | }; |
| 778 | |
| 779 | add_action(iterator, &action); |
| 780 | } else { |
| 781 | if (stream_comp_cur_port != iterator->upstream_port) { |
| 782 | /* |
| 783 | * It looks like two different ports of the same |
| 784 | * component are emitting notifications which |
| 785 | * have references to the same stream. This is |
| 786 | * bad: the API guarantees that it can never |
| 787 | * happen. |
| 788 | */ |
| 789 | BT_LOGW("Two different ports of the same component are emitting notifications which refer to the same stream: " |
| 790 | "stream-addr=%p, stream-name=\"%s\", " |
| 791 | "stream-comp-cur-port-addr=%p, " |
| 792 | "stream-comp-cur-port-name=%p, " |
| 793 | "iter-upstream-port-addr=%p, " |
| 794 | "iter-upstream-port-name=%s", |
| 795 | notif_stream, |
| 796 | bt_ctf_stream_get_name(notif_stream), |
| 797 | stream_comp_cur_port, |
| 798 | bt_port_get_name(stream_comp_cur_port), |
| 799 | iterator->upstream_port, |
| 800 | bt_port_get_name(iterator->upstream_port)); |
| 801 | is_valid = BT_FALSE; |
| 802 | goto end; |
| 803 | } |
| 804 | |
| 805 | } |
| 806 | |
| 807 | stream_state = g_hash_table_lookup(iterator->stream_states, |
| 808 | notif_stream); |
| 809 | if (stream_state) { |
| 810 | BT_LOGV("Stream state already exists: " |
| 811 | "stream-addr=%p, stream-name=\"%s\", " |
| 812 | "stream-state-addr=%p", |
| 813 | notif_stream, |
| 814 | bt_ctf_stream_get_name(notif_stream), stream_state); |
| 815 | |
| 816 | if (stream_state->is_ended) { |
| 817 | /* |
| 818 | * There's a new notification which has a |
| 819 | * reference to a stream which, from this |
| 820 | * iterator's point of view, is ended ("end of |
| 821 | * stream" notification was returned). This is |
| 822 | * bad: the API guarantees that it can never |
| 823 | * happen. |
| 824 | */ |
| 825 | BT_LOGW("Stream is already ended: " |
| 826 | "stream-addr=%p, stream-name=\"%s\"", |
| 827 | notif_stream, |
| 828 | bt_ctf_stream_get_name(notif_stream)); |
| 829 | is_valid = BT_FALSE; |
| 830 | goto end; |
| 831 | } |
| 832 | |
| 833 | switch (notif->type) { |
| 834 | case BT_NOTIFICATION_TYPE_STREAM_BEGIN: |
| 835 | /* |
| 836 | * We already have a stream state, which means |
| 837 | * we already returned a "stream begin" |
| 838 | * notification: this is an invalid duplicate. |
| 839 | */ |
| 840 | BT_LOGW("Duplicate stream beginning notification: " |
| 841 | "stream-addr=%p, stream-name=\"%s\"", |
| 842 | notif_stream, |
| 843 | bt_ctf_stream_get_name(notif_stream)); |
| 844 | is_valid = BT_FALSE; |
| 845 | goto end; |
| 846 | case BT_NOTIFICATION_TYPE_PACKET_BEGIN: |
| 847 | if (notif_packet == stream_state->cur_packet) { |
| 848 | /* Duplicate "packet begin" notification */ |
| 849 | BT_LOGW("Duplicate stream beginning notification: " |
| 850 | "stream-addr=%p, stream-name=\"%s\", " |
| 851 | "packet-addr=%p", |
| 852 | notif_stream, |
| 853 | bt_ctf_stream_get_name(notif_stream), |
| 854 | notif_packet); |
| 855 | is_valid = BT_FALSE; |
| 856 | goto end; |
| 857 | } |
| 858 | break; |
| 859 | default: |
| 860 | break; |
| 861 | } |
| 862 | } |
| 863 | |
| 864 | end: |
| 865 | return is_valid; |
| 866 | } |
| 867 | |
| 868 | static |
| 869 | bt_bool is_subscribed_to_notification_type(struct bt_notification_iterator *iterator, |
| 870 | enum bt_notification_type notif_type) |
| 871 | { |
| 872 | uint32_t iter_notif_type = |
| 873 | (uint32_t) bt_notification_iterator_notif_type_from_notif_type( |
| 874 | notif_type); |
| 875 | |
| 876 | return (iter_notif_type & iterator->subscription_mask) ? BT_TRUE : BT_FALSE; |
| 877 | } |
| 878 | |
| 879 | static |
| 880 | void add_action_push_notif(struct bt_notification_iterator *iterator, |
| 881 | struct bt_notification *notif) |
| 882 | { |
| 883 | struct action action = { |
| 884 | .type = ACTION_TYPE_PUSH_NOTIF, |
| 885 | }; |
| 886 | |
| 887 | assert(notif); |
| 888 | |
| 889 | if (!is_subscribed_to_notification_type(iterator, notif->type)) { |
| 890 | return; |
| 891 | } |
| 892 | |
| 893 | action.payload.push_notif.notif = bt_get(notif); |
| 894 | add_action(iterator, &action); |
| 895 | BT_LOGV("Added \"push notification\" action: notif-addr=%p", notif); |
| 896 | } |
| 897 | |
| 898 | static |
| 899 | int add_action_push_notif_stream_begin( |
| 900 | struct bt_notification_iterator *iterator, |
| 901 | struct bt_ctf_stream *stream) |
| 902 | { |
| 903 | int ret = 0; |
| 904 | struct bt_notification *stream_begin_notif = NULL; |
| 905 | |
| 906 | if (!is_subscribed_to_notification_type(iterator, |
| 907 | BT_NOTIFICATION_TYPE_STREAM_BEGIN)) { |
| 908 | BT_LOGV("Not adding \"push stream beginning notification\" action: " |
| 909 | "notification iterator is not subscribed: addr=%p", |
| 910 | iterator); |
| 911 | goto end; |
| 912 | } |
| 913 | |
| 914 | assert(stream); |
| 915 | stream_begin_notif = bt_notification_stream_begin_create(stream); |
| 916 | if (!stream_begin_notif) { |
| 917 | BT_LOGE_STR("Cannot create stream beginning notification."); |
| 918 | goto error; |
| 919 | } |
| 920 | |
| 921 | add_action_push_notif(iterator, stream_begin_notif); |
| 922 | BT_LOGV("Added \"push stream beginning notification\" action: " |
| 923 | "stream-addr=%p, stream-name=\"%s\"", |
| 924 | stream, bt_ctf_stream_get_name(stream)); |
| 925 | goto end; |
| 926 | |
| 927 | error: |
| 928 | ret = -1; |
| 929 | |
| 930 | end: |
| 931 | bt_put(stream_begin_notif); |
| 932 | return ret; |
| 933 | } |
| 934 | |
| 935 | static |
| 936 | int add_action_push_notif_stream_end( |
| 937 | struct bt_notification_iterator *iterator, |
| 938 | struct bt_ctf_stream *stream) |
| 939 | { |
| 940 | int ret = 0; |
| 941 | struct bt_notification *stream_end_notif = NULL; |
| 942 | |
| 943 | if (!is_subscribed_to_notification_type(iterator, |
| 944 | BT_NOTIFICATION_TYPE_STREAM_END)) { |
| 945 | BT_LOGV("Not adding \"push stream end notification\" action: " |
| 946 | "notification iterator is not subscribed: addr=%p", |
| 947 | iterator); |
| 948 | goto end; |
| 949 | } |
| 950 | |
| 951 | assert(stream); |
| 952 | stream_end_notif = bt_notification_stream_end_create(stream); |
| 953 | if (!stream_end_notif) { |
| 954 | BT_LOGE_STR("Cannot create stream end notification."); |
| 955 | goto error; |
| 956 | } |
| 957 | |
| 958 | add_action_push_notif(iterator, stream_end_notif); |
| 959 | BT_LOGV("Added \"push stream end notification\" action: " |
| 960 | "stream-addr=%p, stream-name=\"%s\"", |
| 961 | stream, bt_ctf_stream_get_name(stream)); |
| 962 | goto end; |
| 963 | |
| 964 | error: |
| 965 | ret = -1; |
| 966 | |
| 967 | end: |
| 968 | bt_put(stream_end_notif); |
| 969 | return ret; |
| 970 | } |
| 971 | |
| 972 | static |
| 973 | int add_action_push_notif_packet_begin( |
| 974 | struct bt_notification_iterator *iterator, |
| 975 | struct bt_ctf_packet *packet) |
| 976 | { |
| 977 | int ret = 0; |
| 978 | struct bt_notification *packet_begin_notif = NULL; |
| 979 | |
| 980 | if (!is_subscribed_to_notification_type(iterator, |
| 981 | BT_NOTIFICATION_TYPE_PACKET_BEGIN)) { |
| 982 | BT_LOGV("Not adding \"push packet beginning notification\" action: " |
| 983 | "notification iterator is not subscribed: addr=%p", |
| 984 | iterator); |
| 985 | goto end; |
| 986 | } |
| 987 | |
| 988 | assert(packet); |
| 989 | packet_begin_notif = bt_notification_packet_begin_create(packet); |
| 990 | if (!packet_begin_notif) { |
| 991 | BT_LOGE_STR("Cannot create packet beginning notification."); |
| 992 | goto error; |
| 993 | } |
| 994 | |
| 995 | add_action_push_notif(iterator, packet_begin_notif); |
| 996 | BT_LOGV("Added \"push packet beginning notification\" action: " |
| 997 | "packet-addr=%p", packet); |
| 998 | goto end; |
| 999 | |
| 1000 | error: |
| 1001 | ret = -1; |
| 1002 | |
| 1003 | end: |
| 1004 | bt_put(packet_begin_notif); |
| 1005 | return ret; |
| 1006 | } |
| 1007 | |
| 1008 | static |
| 1009 | int add_action_push_notif_packet_end( |
| 1010 | struct bt_notification_iterator *iterator, |
| 1011 | struct bt_ctf_packet *packet) |
| 1012 | { |
| 1013 | int ret = 0; |
| 1014 | struct bt_notification *packet_end_notif = NULL; |
| 1015 | |
| 1016 | if (!is_subscribed_to_notification_type(iterator, |
| 1017 | BT_NOTIFICATION_TYPE_PACKET_END)) { |
| 1018 | BT_LOGV("Not adding \"push packet end notification\" action: " |
| 1019 | "notification iterator is not subscribed: addr=%p", |
| 1020 | iterator); |
| 1021 | goto end; |
| 1022 | } |
| 1023 | |
| 1024 | assert(packet); |
| 1025 | packet_end_notif = bt_notification_packet_end_create(packet); |
| 1026 | if (!packet_end_notif) { |
| 1027 | BT_LOGE_STR("Cannot create packet end notification."); |
| 1028 | goto error; |
| 1029 | } |
| 1030 | |
| 1031 | add_action_push_notif(iterator, packet_end_notif); |
| 1032 | BT_LOGV("Added \"push packet end notification\" action: " |
| 1033 | "packet-addr=%p", packet); |
| 1034 | goto end; |
| 1035 | |
| 1036 | error: |
| 1037 | ret = -1; |
| 1038 | |
| 1039 | end: |
| 1040 | bt_put(packet_end_notif); |
| 1041 | return ret; |
| 1042 | } |
| 1043 | |
| 1044 | static |
| 1045 | void add_action_set_stream_state_is_ended( |
| 1046 | struct bt_notification_iterator *iterator, |
| 1047 | struct stream_state *stream_state) |
| 1048 | { |
| 1049 | struct action action = { |
| 1050 | .type = ACTION_TYPE_SET_STREAM_STATE_IS_ENDED, |
| 1051 | .payload.set_stream_state_is_ended = { |
| 1052 | .stream_state = stream_state, |
| 1053 | }, |
| 1054 | }; |
| 1055 | |
| 1056 | assert(stream_state); |
| 1057 | add_action(iterator, &action); |
| 1058 | BT_LOGV("Added \"set stream state's ended\" action: " |
| 1059 | "stream-state-addr=%p", stream_state); |
| 1060 | } |
| 1061 | |
| 1062 | static |
| 1063 | void add_action_set_stream_state_cur_packet( |
| 1064 | struct bt_notification_iterator *iterator, |
| 1065 | struct stream_state *stream_state, |
| 1066 | struct bt_ctf_packet *packet) |
| 1067 | { |
| 1068 | struct action action = { |
| 1069 | .type = ACTION_TYPE_SET_STREAM_STATE_CUR_PACKET, |
| 1070 | .payload.set_stream_state_cur_packet = { |
| 1071 | .stream_state = stream_state, |
| 1072 | .packet = bt_get(packet), |
| 1073 | }, |
| 1074 | }; |
| 1075 | |
| 1076 | assert(stream_state); |
| 1077 | add_action(iterator, &action); |
| 1078 | BT_LOGV("Added \"set stream state's current packet\" action: " |
| 1079 | "stream-state-addr=%p, packet-addr=%p", |
| 1080 | stream_state, packet); |
| 1081 | } |
| 1082 | |
| 1083 | static |
| 1084 | void add_action_update_stream_state_discarded_elements( |
| 1085 | struct bt_notification_iterator *iterator, |
| 1086 | enum action_type type, |
| 1087 | struct stream_state *stream_state, |
| 1088 | struct bt_ctf_clock_value *cur_begin, |
| 1089 | uint64_t cur_count) |
| 1090 | { |
| 1091 | struct action action = { |
| 1092 | .type = type, |
| 1093 | .payload.update_stream_state_discarded_elements = { |
| 1094 | .stream_state = stream_state, |
| 1095 | .cur_begin = bt_get(cur_begin), |
| 1096 | .cur_count = cur_count, |
| 1097 | }, |
| 1098 | }; |
| 1099 | |
| 1100 | assert(stream_state); |
| 1101 | assert(type == ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_PACKETS || |
| 1102 | type == ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_EVENTS); |
| 1103 | add_action(iterator, &action); |
| 1104 | if (type == ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_PACKETS) { |
| 1105 | BT_LOGV("Added \"update stream state's discarded packets\" action: " |
| 1106 | "stream-state-addr=%p, cur-begin-addr=%p, cur-count=%" PRIu64, |
| 1107 | stream_state, cur_begin, cur_count); |
| 1108 | } else if (type == ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_EVENTS) { |
| 1109 | BT_LOGV("Added \"update stream state's discarded events\" action: " |
| 1110 | "stream-state-addr=%p, cur-begin-addr=%p, cur-count=%" PRIu64, |
| 1111 | stream_state, cur_begin, cur_count); |
| 1112 | } |
| 1113 | } |
| 1114 | |
| 1115 | static |
| 1116 | int ensure_stream_state_exists(struct bt_notification_iterator *iterator, |
| 1117 | struct bt_notification *stream_begin_notif, |
| 1118 | struct bt_ctf_stream *notif_stream, |
| 1119 | struct stream_state **stream_state) |
| 1120 | { |
| 1121 | int ret = 0; |
| 1122 | |
| 1123 | if (!notif_stream) { |
| 1124 | /* |
| 1125 | * The notification does not reference any stream: no |
| 1126 | * need to get or create a stream state. |
| 1127 | */ |
| 1128 | goto end; |
| 1129 | } |
| 1130 | |
| 1131 | *stream_state = g_hash_table_lookup(iterator->stream_states, |
| 1132 | notif_stream); |
| 1133 | if (!*stream_state) { |
| 1134 | /* |
| 1135 | * This iterator did not bump into this stream yet: |
| 1136 | * create a stream state and a "stream begin" |
| 1137 | * notification. |
| 1138 | */ |
| 1139 | struct action action = { |
| 1140 | .type = ACTION_TYPE_ADD_STREAM_STATE, |
| 1141 | .payload.add_stream_state = { |
| 1142 | .stream = bt_get(notif_stream), |
| 1143 | .stream_state = NULL, |
| 1144 | }, |
| 1145 | }; |
| 1146 | |
| 1147 | *stream_state = create_stream_state(notif_stream); |
| 1148 | if (!stream_state) { |
| 1149 | BT_LOGE_STR("Cannot create stream state."); |
| 1150 | goto error; |
| 1151 | } |
| 1152 | |
| 1153 | action.payload.add_stream_state.stream_state = |
| 1154 | *stream_state; |
| 1155 | add_action(iterator, &action); |
| 1156 | |
| 1157 | if (stream_begin_notif) { |
| 1158 | add_action_push_notif(iterator, stream_begin_notif); |
| 1159 | } else { |
| 1160 | ret = add_action_push_notif_stream_begin(iterator, |
| 1161 | notif_stream); |
| 1162 | if (ret) { |
| 1163 | BT_LOGE_STR("Cannot add \"push stream beginning notification\" action."); |
| 1164 | goto error; |
| 1165 | } |
| 1166 | } |
| 1167 | } |
| 1168 | |
| 1169 | goto end; |
| 1170 | |
| 1171 | error: |
| 1172 | destroy_stream_state(*stream_state); |
| 1173 | ret = -1; |
| 1174 | |
| 1175 | end: |
| 1176 | return ret; |
| 1177 | } |
| 1178 | |
| 1179 | static |
| 1180 | struct bt_ctf_field *get_struct_field_uint(struct bt_ctf_field *struct_field, |
| 1181 | const char *field_name) |
| 1182 | { |
| 1183 | struct bt_ctf_field *field = NULL; |
| 1184 | struct bt_ctf_field_type *ft = NULL; |
| 1185 | |
| 1186 | field = bt_ctf_field_structure_get_field_by_name(struct_field, |
| 1187 | field_name); |
| 1188 | if (!field) { |
| 1189 | BT_LOGV_STR("`%s` field does not exist."); |
| 1190 | goto end; |
| 1191 | } |
| 1192 | |
| 1193 | if (!bt_ctf_field_is_integer(field)) { |
| 1194 | BT_LOGV("Skipping `%s` field because its type is not an integer field type: " |
| 1195 | "field-addr=%p, ft-addr=%p, ft-id=%s", field_name, |
| 1196 | field, ft, bt_ctf_field_type_id_string( |
| 1197 | bt_ctf_field_type_get_type_id(ft))); |
| 1198 | BT_PUT(field); |
| 1199 | goto end; |
| 1200 | } |
| 1201 | |
| 1202 | ft = bt_ctf_field_get_type(field); |
| 1203 | assert(ft); |
| 1204 | |
| 1205 | if (bt_ctf_field_type_integer_is_signed(ft)) { |
| 1206 | BT_LOGV("Skipping `%s` integer field because its type is signed: " |
| 1207 | "field-addr=%p, ft-addr=%p", field_name, field, ft); |
| 1208 | BT_PUT(field); |
| 1209 | goto end; |
| 1210 | } |
| 1211 | |
| 1212 | end: |
| 1213 | bt_put(ft); |
| 1214 | return field; |
| 1215 | } |
| 1216 | |
| 1217 | static |
| 1218 | uint64_t get_packet_context_events_discarded(struct bt_ctf_packet *packet) |
| 1219 | { |
| 1220 | struct bt_ctf_field *packet_context = NULL; |
| 1221 | struct bt_ctf_field *field = NULL; |
| 1222 | uint64_t retval = -1ULL; |
| 1223 | int ret; |
| 1224 | |
| 1225 | packet_context = bt_ctf_packet_get_context(packet); |
| 1226 | if (!packet_context) { |
| 1227 | goto end; |
| 1228 | } |
| 1229 | |
| 1230 | field = get_struct_field_uint(packet_context, "events_discarded"); |
| 1231 | if (!field) { |
| 1232 | BT_LOGV("`events_discarded` field does not exist in packet's context field: " |
| 1233 | "packet-addr=%p, packet-context-field-addr=%p", |
| 1234 | packet, packet_context); |
| 1235 | goto end; |
| 1236 | } |
| 1237 | |
| 1238 | assert(bt_ctf_field_is_integer(field)); |
| 1239 | ret = bt_ctf_field_unsigned_integer_get_value(field, &retval); |
| 1240 | if (ret) { |
| 1241 | BT_LOGV("Cannot get raw value of packet's context field's `events_discarded` integer field: " |
| 1242 | "packet-addr=%p, field-addr=%p", |
| 1243 | packet, field); |
| 1244 | retval = -1ULL; |
| 1245 | goto end; |
| 1246 | } |
| 1247 | |
| 1248 | end: |
| 1249 | bt_put(packet_context); |
| 1250 | bt_put(field); |
| 1251 | return retval; |
| 1252 | } |
| 1253 | |
| 1254 | static |
| 1255 | uint64_t get_packet_header_packet_seq_num(struct bt_ctf_packet *packet) |
| 1256 | { |
| 1257 | struct bt_ctf_field *packet_header = NULL; |
| 1258 | struct bt_ctf_field *field = NULL; |
| 1259 | uint64_t retval = -1ULL; |
| 1260 | int ret; |
| 1261 | |
| 1262 | packet_header = bt_ctf_packet_get_header(packet); |
| 1263 | if (!packet_header) { |
| 1264 | goto end; |
| 1265 | } |
| 1266 | |
| 1267 | field = get_struct_field_uint(packet_header, "packet_seq_num"); |
| 1268 | if (!field) { |
| 1269 | BT_LOGV("`packet_seq_num` field does not exist in packet's header field: " |
| 1270 | "packet-addr=%p, packet-header-field-addr=%p", |
| 1271 | packet, packet_header); |
| 1272 | goto end; |
| 1273 | } |
| 1274 | |
| 1275 | assert(bt_ctf_field_is_integer(field)); |
| 1276 | ret = bt_ctf_field_unsigned_integer_get_value(field, &retval); |
| 1277 | if (ret) { |
| 1278 | BT_LOGV("Cannot get raw value of packet's header field's `packet_seq_num` integer field: " |
| 1279 | "packet-addr=%p, field-addr=%p", |
| 1280 | packet, field); |
| 1281 | retval = -1ULL; |
| 1282 | goto end; |
| 1283 | } |
| 1284 | |
| 1285 | end: |
| 1286 | bt_put(packet_header); |
| 1287 | bt_put(field); |
| 1288 | return retval; |
| 1289 | } |
| 1290 | |
| 1291 | static |
| 1292 | int handle_discarded_packets(struct bt_notification_iterator *iterator, |
| 1293 | struct bt_ctf_packet *packet, |
| 1294 | struct bt_ctf_clock_value *ts_begin, |
| 1295 | struct bt_ctf_clock_value *ts_end, |
| 1296 | struct stream_state *stream_state) |
| 1297 | { |
| 1298 | struct bt_notification *notif = NULL; |
| 1299 | uint64_t diff; |
| 1300 | uint64_t next_count; |
| 1301 | int ret = 0; |
| 1302 | |
| 1303 | next_count = get_packet_header_packet_seq_num(packet); |
| 1304 | if (next_count == -1ULL) { |
| 1305 | next_count = stream_state->discarded_packets_state.cur_count; |
| 1306 | goto update_state; |
| 1307 | } |
| 1308 | |
| 1309 | if (next_count < stream_state->discarded_packets_state.cur_count) { |
| 1310 | BT_LOGW("Current value of packet's header field's `packet_seq_num` field is lesser than the previous value for the same stream: " |
| 1311 | "not updating the stream state's current value: " |
| 1312 | "packet-addr=%p, prev-count=%" PRIu64 ", " |
| 1313 | "cur-count=%" PRIu64, |
| 1314 | packet, stream_state->discarded_packets_state.cur_count, |
| 1315 | next_count); |
| 1316 | goto end; |
| 1317 | } |
| 1318 | |
| 1319 | diff = next_count - stream_state->discarded_packets_state.cur_count; |
| 1320 | if (diff > 0) { |
| 1321 | /* |
| 1322 | * Add a discarded packets notification. The packets |
| 1323 | * are considered to be lost betweem the state's last time |
| 1324 | * and the current packet's beginning time. |
| 1325 | */ |
| 1326 | notif = bt_notification_discarded_elements_create( |
| 1327 | BT_NOTIFICATION_TYPE_DISCARDED_PACKETS, |
| 1328 | stream_state->stream, |
| 1329 | stream_state->discarded_packets_state.cur_begin, |
| 1330 | ts_begin, diff); |
| 1331 | if (!notif) { |
| 1332 | BT_LOGE_STR("Cannot create discarded packets notification."); |
| 1333 | ret = -1; |
| 1334 | goto end; |
| 1335 | } |
| 1336 | |
| 1337 | add_action_push_notif(iterator, notif); |
| 1338 | } |
| 1339 | |
| 1340 | update_state: |
| 1341 | add_action_update_stream_state_discarded_elements(iterator, |
| 1342 | ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_PACKETS, |
| 1343 | stream_state, ts_end, next_count); |
| 1344 | |
| 1345 | end: |
| 1346 | bt_put(notif); |
| 1347 | return ret; |
| 1348 | } |
| 1349 | |
| 1350 | static |
| 1351 | int handle_discarded_events(struct bt_notification_iterator *iterator, |
| 1352 | struct bt_ctf_packet *packet, |
| 1353 | struct bt_ctf_clock_value *ts_begin, |
| 1354 | struct bt_ctf_clock_value *ts_end, |
| 1355 | struct stream_state *stream_state) |
| 1356 | { |
| 1357 | struct bt_notification *notif = NULL; |
| 1358 | uint64_t diff; |
| 1359 | uint64_t next_count; |
| 1360 | int ret = 0; |
| 1361 | |
| 1362 | next_count = get_packet_context_events_discarded(packet); |
| 1363 | if (next_count == -1ULL) { |
| 1364 | next_count = stream_state->discarded_events_state.cur_count; |
| 1365 | goto update_state; |
| 1366 | } |
| 1367 | |
| 1368 | if (next_count < stream_state->discarded_events_state.cur_count) { |
| 1369 | BT_LOGW("Current value of packet's context field's `events_discarded` field is lesser than the previous value for the same stream: " |
| 1370 | "not updating the stream state's current value: " |
| 1371 | "packet-addr=%p, prev-count=%" PRIu64 ", " |
| 1372 | "cur-count=%" PRIu64, |
| 1373 | packet, stream_state->discarded_events_state.cur_count, |
| 1374 | next_count); |
| 1375 | goto end; |
| 1376 | } |
| 1377 | |
| 1378 | diff = next_count - stream_state->discarded_events_state.cur_count; |
| 1379 | if (diff > 0) { |
| 1380 | /* |
| 1381 | * Add a discarded events notification. The events are |
| 1382 | * considered to be lost betweem the state's last time |
| 1383 | * and the current packet's end time. |
| 1384 | */ |
| 1385 | notif = bt_notification_discarded_elements_create( |
| 1386 | BT_NOTIFICATION_TYPE_DISCARDED_EVENTS, |
| 1387 | stream_state->stream, |
| 1388 | stream_state->discarded_events_state.cur_begin, |
| 1389 | ts_end, diff); |
| 1390 | if (!notif) { |
| 1391 | BT_LOGE_STR("Cannot create discarded events notification."); |
| 1392 | ret = -1; |
| 1393 | goto end; |
| 1394 | } |
| 1395 | |
| 1396 | add_action_push_notif(iterator, notif); |
| 1397 | } |
| 1398 | |
| 1399 | update_state: |
| 1400 | add_action_update_stream_state_discarded_elements(iterator, |
| 1401 | ACTION_TYPE_UPDATE_STREAM_STATE_DISCARDED_EVENTS, |
| 1402 | stream_state, ts_end, next_count); |
| 1403 | |
| 1404 | end: |
| 1405 | bt_put(notif); |
| 1406 | return ret; |
| 1407 | } |
| 1408 | |
| 1409 | static |
| 1410 | int get_field_clock_value(struct bt_ctf_field *root_field, |
| 1411 | const char *field_name, |
| 1412 | struct bt_ctf_clock_value **user_clock_val) |
| 1413 | { |
| 1414 | struct bt_ctf_field *field; |
| 1415 | struct bt_ctf_field_type *ft = NULL; |
| 1416 | struct bt_ctf_clock_class *clock_class = NULL; |
| 1417 | struct bt_ctf_clock_value *clock_value = NULL; |
| 1418 | uint64_t val; |
| 1419 | int ret = 0; |
| 1420 | |
| 1421 | field = get_struct_field_uint(root_field, field_name); |
| 1422 | if (!field) { |
| 1423 | /* Not an error: skip this */ |
| 1424 | goto end; |
| 1425 | } |
| 1426 | |
| 1427 | ft = bt_ctf_field_get_type(field); |
| 1428 | assert(ft); |
| 1429 | clock_class = bt_ctf_field_type_integer_get_mapped_clock_class(ft); |
| 1430 | if (!clock_class) { |
| 1431 | BT_LOGW("Integer field type has no mapped clock class but it's expected to have one: " |
| 1432 | "ft-addr=%p", ft); |
| 1433 | ret = -1; |
| 1434 | goto end; |
| 1435 | } |
| 1436 | |
| 1437 | ret = bt_ctf_field_unsigned_integer_get_value(field, &val); |
| 1438 | if (ret) { |
| 1439 | BT_LOGW("Cannot get integer field's raw value: " |
| 1440 | "field-addr=%p", field); |
| 1441 | ret = -1; |
| 1442 | goto end; |
| 1443 | } |
| 1444 | |
| 1445 | clock_value = bt_ctf_clock_value_create(clock_class, val); |
| 1446 | if (!clock_value) { |
| 1447 | BT_LOGE_STR("Cannot create clock value from clock class."); |
| 1448 | ret = -1; |
| 1449 | goto end; |
| 1450 | } |
| 1451 | |
| 1452 | /* Move clock value to user */ |
| 1453 | *user_clock_val = clock_value; |
| 1454 | clock_value = NULL; |
| 1455 | |
| 1456 | end: |
| 1457 | bt_put(field); |
| 1458 | bt_put(ft); |
| 1459 | bt_put(clock_class); |
| 1460 | bt_put(clock_value); |
| 1461 | return ret; |
| 1462 | } |
| 1463 | |
| 1464 | static |
| 1465 | int get_ts_begin_ts_end_from_packet(struct bt_ctf_packet *packet, |
| 1466 | struct bt_ctf_clock_value **user_ts_begin, |
| 1467 | struct bt_ctf_clock_value **user_ts_end) |
| 1468 | { |
| 1469 | struct bt_ctf_field *packet_context = NULL; |
| 1470 | struct bt_ctf_clock_value *ts_begin = NULL; |
| 1471 | struct bt_ctf_clock_value *ts_end = NULL; |
| 1472 | int ret = 0; |
| 1473 | |
| 1474 | packet_context = bt_ctf_packet_get_context(packet); |
| 1475 | if (!packet_context) { |
| 1476 | goto end; |
| 1477 | } |
| 1478 | |
| 1479 | ret = get_field_clock_value(packet_context, "timestamp_begin", |
| 1480 | &ts_begin); |
| 1481 | if (ret) { |
| 1482 | BT_LOGW("Cannot create clock value for packet context's `timestamp_begin` field: " |
| 1483 | "packet-addr=%p, packet-context-field-addr=%p", |
| 1484 | packet, packet_context); |
| 1485 | goto end; |
| 1486 | } |
| 1487 | |
| 1488 | ret = get_field_clock_value(packet_context, "timestamp_end", |
| 1489 | &ts_end); |
| 1490 | if (ret) { |
| 1491 | BT_LOGW("Cannot create clock value for packet context's `timestamp_begin` field: " |
| 1492 | "packet-addr=%p, packet-context-field-addr=%p", |
| 1493 | packet, packet_context); |
| 1494 | goto end; |
| 1495 | } |
| 1496 | |
| 1497 | /* Move clock values to user */ |
| 1498 | *user_ts_begin = ts_begin; |
| 1499 | ts_begin = NULL; |
| 1500 | *user_ts_end = ts_end; |
| 1501 | ts_end = NULL; |
| 1502 | |
| 1503 | end: |
| 1504 | bt_put(packet_context); |
| 1505 | bt_put(ts_begin); |
| 1506 | bt_put(ts_end); |
| 1507 | return ret; |
| 1508 | } |
| 1509 | |
| 1510 | static |
| 1511 | int handle_discarded_elements(struct bt_notification_iterator *iterator, |
| 1512 | struct bt_ctf_packet *packet, struct stream_state *stream_state) |
| 1513 | { |
| 1514 | struct bt_ctf_clock_value *ts_begin = NULL; |
| 1515 | struct bt_ctf_clock_value *ts_end = NULL; |
| 1516 | int ret; |
| 1517 | |
| 1518 | ret = get_ts_begin_ts_end_from_packet(packet, &ts_begin, &ts_end); |
| 1519 | if (ret) { |
| 1520 | BT_LOGW("Cannot get packet's beginning or end clock values: " |
| 1521 | "packet-addr=%p, ret=%d", packet, ret); |
| 1522 | ret = -1; |
| 1523 | goto end; |
| 1524 | } |
| 1525 | |
| 1526 | ret = handle_discarded_packets(iterator, packet, ts_begin, ts_end, |
| 1527 | stream_state); |
| 1528 | if (ret) { |
| 1529 | BT_LOGW("Cannot handle discarded packets for packet: " |
| 1530 | "packet-addr=%p, ret=%d", packet, ret); |
| 1531 | ret = -1; |
| 1532 | goto end; |
| 1533 | } |
| 1534 | |
| 1535 | ret = handle_discarded_events(iterator, packet, ts_begin, ts_end, |
| 1536 | stream_state); |
| 1537 | if (ret) { |
| 1538 | BT_LOGW("Cannot handle discarded events for packet: " |
| 1539 | "packet-addr=%p, ret=%d", packet, ret); |
| 1540 | ret = -1; |
| 1541 | goto end; |
| 1542 | } |
| 1543 | |
| 1544 | end: |
| 1545 | bt_put(ts_begin); |
| 1546 | bt_put(ts_end); |
| 1547 | return ret; |
| 1548 | } |
| 1549 | |
| 1550 | static |
| 1551 | int handle_packet_switch(struct bt_notification_iterator *iterator, |
| 1552 | struct bt_notification *packet_begin_notif, |
| 1553 | struct bt_ctf_packet *new_packet, |
| 1554 | struct stream_state *stream_state) |
| 1555 | { |
| 1556 | int ret = 0; |
| 1557 | |
| 1558 | if (stream_state->cur_packet == new_packet) { |
| 1559 | goto end; |
| 1560 | } |
| 1561 | |
| 1562 | BT_LOGV("Handling packet switch: " |
| 1563 | "cur-packet-addr=%p, new-packet-addr=%p", |
| 1564 | stream_state->cur_packet, new_packet); |
| 1565 | |
| 1566 | if (stream_state->cur_packet) { |
| 1567 | /* End of the current packet */ |
| 1568 | ret = add_action_push_notif_packet_end(iterator, |
| 1569 | stream_state->cur_packet); |
| 1570 | if (ret) { |
| 1571 | BT_LOGE_STR("Cannot add \"push packet end notification\" action."); |
| 1572 | goto error; |
| 1573 | } |
| 1574 | } |
| 1575 | |
| 1576 | /* |
| 1577 | * Check the new packet's header and context fields for |
| 1578 | * discarded packets and events to emit those automatic |
| 1579 | * notifications. |
| 1580 | */ |
| 1581 | ret = handle_discarded_elements(iterator, new_packet, stream_state); |
| 1582 | if (ret) { |
| 1583 | BT_LOGE_STR("Cannot handle discarded elements for new packet."); |
| 1584 | goto error; |
| 1585 | } |
| 1586 | |
| 1587 | /* Beginning of the new packet */ |
| 1588 | if (packet_begin_notif) { |
| 1589 | add_action_push_notif(iterator, packet_begin_notif); |
| 1590 | } else if (new_packet) { |
| 1591 | ret = add_action_push_notif_packet_begin(iterator, |
| 1592 | new_packet); |
| 1593 | if (ret) { |
| 1594 | BT_LOGE_STR("Cannot add \"push packet beginning notification\" action."); |
| 1595 | goto error; |
| 1596 | } |
| 1597 | } |
| 1598 | |
| 1599 | add_action_set_stream_state_cur_packet(iterator, stream_state, |
| 1600 | new_packet); |
| 1601 | goto end; |
| 1602 | |
| 1603 | error: |
| 1604 | ret = -1; |
| 1605 | |
| 1606 | end: |
| 1607 | return ret; |
| 1608 | } |
| 1609 | |
| 1610 | static |
| 1611 | int handle_notif_stream_begin( |
| 1612 | struct bt_notification_iterator *iterator, |
| 1613 | struct bt_notification *notif, |
| 1614 | struct bt_ctf_stream *notif_stream) |
| 1615 | { |
| 1616 | int ret = 0; |
| 1617 | struct stream_state *stream_state; |
| 1618 | |
| 1619 | assert(notif->type == BT_NOTIFICATION_TYPE_STREAM_BEGIN); |
| 1620 | assert(notif_stream); |
| 1621 | ret = ensure_stream_state_exists(iterator, notif, notif_stream, |
| 1622 | &stream_state); |
| 1623 | if (ret) { |
| 1624 | BT_LOGE_STR("Cannot ensure that stream state exists."); |
| 1625 | goto error; |
| 1626 | } |
| 1627 | |
| 1628 | goto end; |
| 1629 | |
| 1630 | error: |
| 1631 | ret = -1; |
| 1632 | |
| 1633 | end: |
| 1634 | return ret; |
| 1635 | } |
| 1636 | |
| 1637 | static |
| 1638 | int handle_notif_stream_end( |
| 1639 | struct bt_notification_iterator *iterator, |
| 1640 | struct bt_notification *notif, |
| 1641 | struct bt_ctf_stream *notif_stream) |
| 1642 | { |
| 1643 | int ret = 0; |
| 1644 | struct stream_state *stream_state; |
| 1645 | |
| 1646 | assert(notif->type == BT_NOTIFICATION_TYPE_STREAM_END); |
| 1647 | assert(notif_stream); |
| 1648 | ret = ensure_stream_state_exists(iterator, NULL, notif_stream, |
| 1649 | &stream_state); |
| 1650 | if (ret) { |
| 1651 | BT_LOGE_STR("Cannot ensure that stream state exists."); |
| 1652 | goto error; |
| 1653 | } |
| 1654 | |
| 1655 | ret = handle_packet_switch(iterator, NULL, NULL, stream_state); |
| 1656 | if (ret) { |
| 1657 | BT_LOGE_STR("Cannot handle packet switch."); |
| 1658 | goto error; |
| 1659 | } |
| 1660 | |
| 1661 | add_action_push_notif(iterator, notif); |
| 1662 | add_action_set_stream_state_is_ended(iterator, stream_state); |
| 1663 | goto end; |
| 1664 | |
| 1665 | error: |
| 1666 | ret = -1; |
| 1667 | |
| 1668 | end: |
| 1669 | return ret; |
| 1670 | } |
| 1671 | |
| 1672 | static |
| 1673 | int handle_notif_discarded_elements( |
| 1674 | struct bt_notification_iterator *iterator, |
| 1675 | struct bt_notification *notif, |
| 1676 | struct bt_ctf_stream *notif_stream) |
| 1677 | { |
| 1678 | int ret = 0; |
| 1679 | struct stream_state *stream_state; |
| 1680 | |
| 1681 | assert(notif->type == BT_NOTIFICATION_TYPE_DISCARDED_EVENTS || |
| 1682 | notif->type == BT_NOTIFICATION_TYPE_DISCARDED_PACKETS); |
| 1683 | assert(notif_stream); |
| 1684 | ret = ensure_stream_state_exists(iterator, NULL, notif_stream, |
| 1685 | &stream_state); |
| 1686 | if (ret) { |
| 1687 | BT_LOGE_STR("Cannot ensure that stream state exists."); |
| 1688 | goto error; |
| 1689 | } |
| 1690 | |
| 1691 | add_action_push_notif(iterator, notif); |
| 1692 | goto end; |
| 1693 | |
| 1694 | error: |
| 1695 | ret = -1; |
| 1696 | |
| 1697 | end: |
| 1698 | return ret; |
| 1699 | } |
| 1700 | |
| 1701 | static |
| 1702 | int handle_notif_packet_begin( |
| 1703 | struct bt_notification_iterator *iterator, |
| 1704 | struct bt_notification *notif, |
| 1705 | struct bt_ctf_stream *notif_stream, |
| 1706 | struct bt_ctf_packet *notif_packet) |
| 1707 | { |
| 1708 | int ret = 0; |
| 1709 | struct stream_state *stream_state; |
| 1710 | |
| 1711 | assert(notif->type == BT_NOTIFICATION_TYPE_PACKET_BEGIN); |
| 1712 | assert(notif_packet); |
| 1713 | ret = ensure_stream_state_exists(iterator, NULL, notif_stream, |
| 1714 | &stream_state); |
| 1715 | if (ret) { |
| 1716 | BT_LOGE_STR("Cannot ensure that stream state exists."); |
| 1717 | goto error; |
| 1718 | } |
| 1719 | |
| 1720 | ret = handle_packet_switch(iterator, notif, notif_packet, stream_state); |
| 1721 | if (ret) { |
| 1722 | BT_LOGE_STR("Cannot handle packet switch."); |
| 1723 | goto error; |
| 1724 | } |
| 1725 | |
| 1726 | goto end; |
| 1727 | |
| 1728 | error: |
| 1729 | ret = -1; |
| 1730 | |
| 1731 | end: |
| 1732 | return ret; |
| 1733 | } |
| 1734 | |
| 1735 | static |
| 1736 | int handle_notif_packet_end( |
| 1737 | struct bt_notification_iterator *iterator, |
| 1738 | struct bt_notification *notif, |
| 1739 | struct bt_ctf_stream *notif_stream, |
| 1740 | struct bt_ctf_packet *notif_packet) |
| 1741 | { |
| 1742 | int ret = 0; |
| 1743 | struct stream_state *stream_state; |
| 1744 | |
| 1745 | assert(notif->type == BT_NOTIFICATION_TYPE_PACKET_END); |
| 1746 | assert(notif_packet); |
| 1747 | ret = ensure_stream_state_exists(iterator, NULL, notif_stream, |
| 1748 | &stream_state); |
| 1749 | if (ret) { |
| 1750 | BT_LOGE_STR("Cannot ensure that stream state exists."); |
| 1751 | goto error; |
| 1752 | } |
| 1753 | |
| 1754 | ret = handle_packet_switch(iterator, NULL, notif_packet, stream_state); |
| 1755 | if (ret) { |
| 1756 | BT_LOGE_STR("Cannot handle packet switch."); |
| 1757 | goto error; |
| 1758 | } |
| 1759 | |
| 1760 | /* End of the current packet */ |
| 1761 | add_action_push_notif(iterator, notif); |
| 1762 | add_action_set_stream_state_cur_packet(iterator, stream_state, NULL); |
| 1763 | goto end; |
| 1764 | |
| 1765 | error: |
| 1766 | ret = -1; |
| 1767 | |
| 1768 | end: |
| 1769 | return ret; |
| 1770 | } |
| 1771 | |
| 1772 | static |
| 1773 | int handle_notif_event( |
| 1774 | struct bt_notification_iterator *iterator, |
| 1775 | struct bt_notification *notif, |
| 1776 | struct bt_ctf_stream *notif_stream, |
| 1777 | struct bt_ctf_packet *notif_packet) |
| 1778 | { |
| 1779 | int ret = 0; |
| 1780 | struct stream_state *stream_state; |
| 1781 | |
| 1782 | assert(notif->type == BT_NOTIFICATION_TYPE_EVENT); |
| 1783 | assert(notif_packet); |
| 1784 | ret = ensure_stream_state_exists(iterator, NULL, notif_stream, |
| 1785 | &stream_state); |
| 1786 | if (ret) { |
| 1787 | BT_LOGE_STR("Cannot ensure that stream state exists."); |
| 1788 | goto error; |
| 1789 | } |
| 1790 | |
| 1791 | ret = handle_packet_switch(iterator, NULL, notif_packet, stream_state); |
| 1792 | if (ret) { |
| 1793 | BT_LOGE_STR("Cannot handle packet switch."); |
| 1794 | goto error; |
| 1795 | } |
| 1796 | |
| 1797 | add_action_push_notif(iterator, notif); |
| 1798 | goto end; |
| 1799 | |
| 1800 | error: |
| 1801 | ret = -1; |
| 1802 | |
| 1803 | end: |
| 1804 | return ret; |
| 1805 | } |
| 1806 | |
| 1807 | static |
| 1808 | int enqueue_notification_and_automatic( |
| 1809 | struct bt_notification_iterator *iterator, |
| 1810 | struct bt_notification *notif) |
| 1811 | { |
| 1812 | int ret = 0; |
| 1813 | struct bt_ctf_event *notif_event = NULL; |
| 1814 | struct bt_ctf_stream *notif_stream = NULL; |
| 1815 | struct bt_ctf_packet *notif_packet = NULL; |
| 1816 | |
| 1817 | assert(notif); |
| 1818 | |
| 1819 | BT_LOGV("Enqueuing user notification and automatic notifications: " |
| 1820 | "iter-addr=%p, notif-addr=%p", iterator, notif); |
| 1821 | |
| 1822 | // TODO: Skip most of this if the iterator is only subscribed |
| 1823 | // to event/inactivity notifications. |
| 1824 | |
| 1825 | /* Get the stream and packet referred by the notification */ |
| 1826 | switch (notif->type) { |
| 1827 | case BT_NOTIFICATION_TYPE_EVENT: |
| 1828 | notif_event = bt_notification_event_borrow_event(notif); |
| 1829 | assert(notif_event); |
| 1830 | notif_packet = bt_ctf_event_borrow_packet(notif_event); |
| 1831 | assert(notif_packet); |
| 1832 | break; |
| 1833 | case BT_NOTIFICATION_TYPE_STREAM_BEGIN: |
| 1834 | notif_stream = |
| 1835 | bt_notification_stream_begin_borrow_stream(notif); |
| 1836 | assert(notif_stream); |
| 1837 | break; |
| 1838 | case BT_NOTIFICATION_TYPE_STREAM_END: |
| 1839 | notif_stream = bt_notification_stream_end_borrow_stream(notif); |
| 1840 | assert(notif_stream); |
| 1841 | break; |
| 1842 | case BT_NOTIFICATION_TYPE_PACKET_BEGIN: |
| 1843 | notif_packet = |
| 1844 | bt_notification_packet_begin_borrow_packet(notif); |
| 1845 | assert(notif_packet); |
| 1846 | break; |
| 1847 | case BT_NOTIFICATION_TYPE_PACKET_END: |
| 1848 | notif_packet = bt_notification_packet_end_borrow_packet(notif); |
| 1849 | assert(notif_packet); |
| 1850 | break; |
| 1851 | case BT_NOTIFICATION_TYPE_INACTIVITY: |
| 1852 | /* Always valid */ |
| 1853 | goto handle_notif; |
| 1854 | default: |
| 1855 | /* |
| 1856 | * Invalid type of notification. Only the notification |
| 1857 | * types above are allowed to be returned by a user |
| 1858 | * component. |
| 1859 | */ |
| 1860 | BT_LOGF("Unexpected notification type at this point: " |
| 1861 | "notif-addr=%p, notif-type=%s", notif, |
| 1862 | bt_notification_type_string(notif->type)); |
| 1863 | abort(); |
| 1864 | } |
| 1865 | |
| 1866 | if (notif_packet) { |
| 1867 | notif_stream = bt_ctf_packet_borrow_stream(notif_packet); |
| 1868 | assert(notif_stream); |
| 1869 | } |
| 1870 | |
| 1871 | if (!notif_stream) { |
| 1872 | /* |
| 1873 | * The notification has no reference to a stream: it |
| 1874 | * cannot cause the creation of automatic notifications. |
| 1875 | */ |
| 1876 | BT_LOGV_STR("Notification has no reference to any stream: skipping automatic notification generation."); |
| 1877 | goto end; |
| 1878 | } |
| 1879 | |
| 1880 | if (!validate_notification(iterator, notif, notif_stream, |
| 1881 | notif_packet)) { |
| 1882 | BT_LOGW_STR("Invalid notification."); |
| 1883 | goto error; |
| 1884 | } |
| 1885 | |
| 1886 | handle_notif: |
| 1887 | switch (notif->type) { |
| 1888 | case BT_NOTIFICATION_TYPE_EVENT: |
| 1889 | ret = handle_notif_event(iterator, notif, notif_stream, |
| 1890 | notif_packet); |
| 1891 | break; |
| 1892 | case BT_NOTIFICATION_TYPE_STREAM_BEGIN: |
| 1893 | ret = handle_notif_stream_begin(iterator, notif, notif_stream); |
| 1894 | break; |
| 1895 | case BT_NOTIFICATION_TYPE_STREAM_END: |
| 1896 | ret = handle_notif_stream_end(iterator, notif, notif_stream); |
| 1897 | break; |
| 1898 | case BT_NOTIFICATION_TYPE_PACKET_BEGIN: |
| 1899 | ret = handle_notif_packet_begin(iterator, notif, notif_stream, |
| 1900 | notif_packet); |
| 1901 | break; |
| 1902 | case BT_NOTIFICATION_TYPE_PACKET_END: |
| 1903 | ret = handle_notif_packet_end(iterator, notif, notif_stream, |
| 1904 | notif_packet); |
| 1905 | break; |
| 1906 | case BT_NOTIFICATION_TYPE_DISCARDED_EVENTS: |
| 1907 | case BT_NOTIFICATION_TYPE_DISCARDED_PACKETS: |
| 1908 | ret = handle_notif_discarded_elements(iterator, notif, |
| 1909 | notif_stream); |
| 1910 | break; |
| 1911 | case BT_NOTIFICATION_TYPE_INACTIVITY: |
| 1912 | add_action_push_notif(iterator, notif); |
| 1913 | break; |
| 1914 | default: |
| 1915 | break; |
| 1916 | } |
| 1917 | |
| 1918 | if (ret) { |
| 1919 | BT_LOGW_STR("Failed to handle notification for automatic notification generation."); |
| 1920 | goto error; |
| 1921 | } |
| 1922 | |
| 1923 | apply_actions(iterator); |
| 1924 | BT_LOGV("Enqueued user notification and automatic notifications: " |
| 1925 | "iter-addr=%p, notif-addr=%p", iterator, notif); |
| 1926 | goto end; |
| 1927 | |
| 1928 | error: |
| 1929 | ret = -1; |
| 1930 | |
| 1931 | end: |
| 1932 | return ret; |
| 1933 | } |
| 1934 | |
| 1935 | static |
| 1936 | int handle_end(struct bt_notification_iterator *iterator) |
| 1937 | { |
| 1938 | GHashTableIter stream_state_iter; |
| 1939 | gpointer stream_gptr, stream_state_gptr; |
| 1940 | int ret = 0; |
| 1941 | |
| 1942 | BT_LOGV("Handling end of iteration: addr=%p", iterator); |
| 1943 | |
| 1944 | /* |
| 1945 | * Emit a "stream end" notification for each non-ended stream |
| 1946 | * known by this iterator and mark them as ended. |
| 1947 | */ |
| 1948 | g_hash_table_iter_init(&stream_state_iter, iterator->stream_states); |
| 1949 | |
| 1950 | while (g_hash_table_iter_next(&stream_state_iter, &stream_gptr, |
| 1951 | &stream_state_gptr)) { |
| 1952 | struct stream_state *stream_state = stream_state_gptr; |
| 1953 | |
| 1954 | assert(stream_state_gptr); |
| 1955 | |
| 1956 | if (stream_state->is_ended) { |
| 1957 | continue; |
| 1958 | } |
| 1959 | |
| 1960 | ret = handle_packet_switch(iterator, NULL, NULL, stream_state); |
| 1961 | if (ret) { |
| 1962 | BT_LOGE_STR("Cannot handle packet switch."); |
| 1963 | goto error; |
| 1964 | } |
| 1965 | |
| 1966 | ret = add_action_push_notif_stream_end(iterator, stream_gptr); |
| 1967 | if (ret) { |
| 1968 | BT_LOGE_STR("Cannot add \"push stream end notification\" action."); |
| 1969 | goto error; |
| 1970 | } |
| 1971 | |
| 1972 | add_action_set_stream_state_is_ended(iterator, stream_state); |
| 1973 | } |
| 1974 | |
| 1975 | apply_actions(iterator); |
| 1976 | BT_LOGV("Handled end of iteration: addr=%p", iterator); |
| 1977 | goto end; |
| 1978 | |
| 1979 | error: |
| 1980 | ret = -1; |
| 1981 | |
| 1982 | end: |
| 1983 | return ret; |
| 1984 | } |
| 1985 | |
| 1986 | static |
| 1987 | enum bt_notification_iterator_status ensure_queue_has_notifications( |
| 1988 | struct bt_notification_iterator *iterator) |
| 1989 | { |
| 1990 | struct bt_private_notification_iterator *priv_iterator = |
| 1991 | bt_private_notification_iterator_from_notification_iterator(iterator); |
| 1992 | bt_component_class_notification_iterator_next_method next_method = NULL; |
| 1993 | struct bt_notification_iterator_next_return next_return = { |
| 1994 | .status = BT_NOTIFICATION_ITERATOR_STATUS_OK, |
| 1995 | .notification = NULL, |
| 1996 | }; |
| 1997 | enum bt_notification_iterator_status status = |
| 1998 | BT_NOTIFICATION_ITERATOR_STATUS_OK; |
| 1999 | int ret; |
| 2000 | |
| 2001 | assert(iterator); |
| 2002 | BT_LOGD("Ensuring that notification iterator's queue has at least one notification: " |
| 2003 | "iter-addr=%p, queue-size=%u, iter-state=%s", |
| 2004 | iterator, iterator->queue->length, |
| 2005 | bt_notification_iterator_state_string(iterator->state)); |
| 2006 | |
| 2007 | if (iterator->queue->length > 0) { |
| 2008 | /* |
| 2009 | * We already have enough. Even if this notification |
| 2010 | * iterator is finalized, its user can still flush its |
| 2011 | * current queue's content by calling its "next" method |
| 2012 | * since this content is local and has no impact on what |
| 2013 | * used to be the iterator's upstream component. |
| 2014 | */ |
| 2015 | BT_LOGD_STR("Queue already has at least one notification."); |
| 2016 | goto end; |
| 2017 | } |
| 2018 | |
| 2019 | switch (iterator->state) { |
| 2020 | case BT_NOTIFICATION_ITERATOR_STATE_FINALIZED_AND_ENDED: |
| 2021 | case BT_NOTIFICATION_ITERATOR_STATE_FINALIZED: |
| 2022 | BT_LOGD_STR("Notification iterator's \"next\" called, but it is finalized."); |
| 2023 | status = BT_NOTIFICATION_ITERATOR_STATUS_CANCELED; |
| 2024 | goto end; |
| 2025 | case BT_NOTIFICATION_ITERATOR_STATE_ENDED: |
| 2026 | BT_LOGD_STR("Notification iterator is ended."); |
| 2027 | status = BT_NOTIFICATION_ITERATOR_STATUS_END; |
| 2028 | goto end; |
| 2029 | default: |
| 2030 | break; |
| 2031 | } |
| 2032 | |
| 2033 | assert(iterator->upstream_component); |
| 2034 | assert(iterator->upstream_component->class); |
| 2035 | |
| 2036 | /* Pick the appropriate "next" method */ |
| 2037 | switch (iterator->upstream_component->class->type) { |
| 2038 | case BT_COMPONENT_CLASS_TYPE_SOURCE: |
| 2039 | { |
| 2040 | struct bt_component_class_source *source_class = |
| 2041 | container_of(iterator->upstream_component->class, |
| 2042 | struct bt_component_class_source, parent); |
| 2043 | |
| 2044 | assert(source_class->methods.iterator.next); |
| 2045 | next_method = source_class->methods.iterator.next; |
| 2046 | break; |
| 2047 | } |
| 2048 | case BT_COMPONENT_CLASS_TYPE_FILTER: |
| 2049 | { |
| 2050 | struct bt_component_class_filter *filter_class = |
| 2051 | container_of(iterator->upstream_component->class, |
| 2052 | struct bt_component_class_filter, parent); |
| 2053 | |
| 2054 | assert(filter_class->methods.iterator.next); |
| 2055 | next_method = filter_class->methods.iterator.next; |
| 2056 | break; |
| 2057 | } |
| 2058 | default: |
| 2059 | abort(); |
| 2060 | } |
| 2061 | |
| 2062 | /* |
| 2063 | * Call the user's "next" method to get the next notification |
| 2064 | * and status. |
| 2065 | */ |
| 2066 | assert(next_method); |
| 2067 | |
| 2068 | while (iterator->queue->length == 0) { |
| 2069 | BT_LOGD_STR("Calling user's \"next\" method."); |
| 2070 | next_return = next_method(priv_iterator); |
| 2071 | BT_LOGD("User method returned: status=%s", |
| 2072 | bt_notification_iterator_status_string(next_return.status)); |
| 2073 | if (next_return.status < 0) { |
| 2074 | BT_LOGW_STR("User method failed."); |
| 2075 | status = next_return.status; |
| 2076 | goto end; |
| 2077 | } |
| 2078 | |
| 2079 | if (iterator->state == BT_NOTIFICATION_ITERATOR_STATE_FINALIZED || |
| 2080 | iterator->state == BT_NOTIFICATION_ITERATOR_STATE_FINALIZED_AND_ENDED) { |
| 2081 | /* |
| 2082 | * The user's "next" method, somehow, cancelled |
| 2083 | * its own notification iterator. This can |
| 2084 | * happen, for example, when the user's method |
| 2085 | * removes the port on which there's the |
| 2086 | * connection from which the iterator was |
| 2087 | * created. In this case, said connection is |
| 2088 | * ended, and all its notification iterators are |
| 2089 | * finalized. |
| 2090 | * |
| 2091 | * Only bt_put() the returned notification if |
| 2092 | * the status is |
| 2093 | * BT_NOTIFICATION_ITERATOR_STATUS_OK because |
| 2094 | * otherwise this field could be garbage. |
| 2095 | */ |
| 2096 | if (next_return.status == |
| 2097 | BT_NOTIFICATION_ITERATOR_STATUS_OK) { |
| 2098 | bt_put(next_return.notification); |
| 2099 | } |
| 2100 | |
| 2101 | status = BT_NOTIFICATION_ITERATOR_STATUS_CANCELED; |
| 2102 | goto end; |
| 2103 | } |
| 2104 | |
| 2105 | switch (next_return.status) { |
| 2106 | case BT_NOTIFICATION_ITERATOR_STATUS_END: |
| 2107 | ret = handle_end(iterator); |
| 2108 | if (ret) { |
| 2109 | BT_LOGW_STR("Cannot handle end of iteration."); |
| 2110 | status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; |
| 2111 | goto end; |
| 2112 | } |
| 2113 | |
| 2114 | assert(iterator->state == |
| 2115 | BT_NOTIFICATION_ITERATOR_STATE_ACTIVE); |
| 2116 | iterator->state = BT_NOTIFICATION_ITERATOR_STATE_ENDED; |
| 2117 | |
| 2118 | if (iterator->queue->length == 0) { |
| 2119 | status = BT_NOTIFICATION_ITERATOR_STATUS_END; |
| 2120 | } |
| 2121 | |
| 2122 | BT_LOGD("Set new status: status=%s", |
| 2123 | bt_notification_iterator_status_string(status)); |
| 2124 | goto end; |
| 2125 | case BT_NOTIFICATION_ITERATOR_STATUS_AGAIN: |
| 2126 | status = BT_NOTIFICATION_ITERATOR_STATUS_AGAIN; |
| 2127 | goto end; |
| 2128 | case BT_NOTIFICATION_ITERATOR_STATUS_OK: |
| 2129 | if (!next_return.notification) { |
| 2130 | BT_LOGW_STR("User method returned BT_NOTIFICATION_ITERATOR_STATUS_OK, but notification is NULL."); |
| 2131 | status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; |
| 2132 | goto end; |
| 2133 | } |
| 2134 | |
| 2135 | /* |
| 2136 | * Ignore some notifications which are always |
| 2137 | * automatically generated by the notification |
| 2138 | * iterator to make sure they have valid values. |
| 2139 | */ |
| 2140 | switch (next_return.notification->type) { |
| 2141 | case BT_NOTIFICATION_TYPE_DISCARDED_PACKETS: |
| 2142 | case BT_NOTIFICATION_TYPE_DISCARDED_EVENTS: |
| 2143 | BT_LOGV("Ignoring discarded elements notification returned by notification iterator's \"next\" method: " |
| 2144 | "notif-type=%s", |
| 2145 | bt_notification_type_string(next_return.notification->type)); |
| 2146 | BT_PUT(next_return.notification); |
| 2147 | continue; |
| 2148 | default: |
| 2149 | break; |
| 2150 | } |
| 2151 | |
| 2152 | /* |
| 2153 | * We know the notification is valid. Before we |
| 2154 | * push it to the head of the queue, push the |
| 2155 | * appropriate automatic notifications if any. |
| 2156 | */ |
| 2157 | ret = enqueue_notification_and_automatic(iterator, |
| 2158 | next_return.notification); |
| 2159 | BT_PUT(next_return.notification); |
| 2160 | if (ret) { |
| 2161 | BT_LOGW("Cannot enqueue notification and automatic notifications."); |
| 2162 | status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; |
| 2163 | goto end; |
| 2164 | } |
| 2165 | break; |
| 2166 | default: |
| 2167 | /* Unknown non-error status */ |
| 2168 | abort(); |
| 2169 | } |
| 2170 | } |
| 2171 | |
| 2172 | end: |
| 2173 | return status; |
| 2174 | } |
| 2175 | |
| 2176 | enum bt_notification_iterator_status |
| 2177 | bt_notification_iterator_next(struct bt_notification_iterator *iterator) |
| 2178 | { |
| 2179 | enum bt_notification_iterator_status status; |
| 2180 | |
| 2181 | if (!iterator) { |
| 2182 | BT_LOGW_STR("Invalid parameter: notification iterator is NULL."); |
| 2183 | status = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; |
| 2184 | goto end; |
| 2185 | } |
| 2186 | |
| 2187 | BT_LOGD("Notification iterator's \"next\": iter-addr=%p", iterator); |
| 2188 | |
| 2189 | /* |
| 2190 | * Make sure that the iterator's queue contains at least one |
| 2191 | * notification. |
| 2192 | */ |
| 2193 | status = ensure_queue_has_notifications(iterator); |
| 2194 | if (status != BT_NOTIFICATION_ITERATOR_STATUS_OK) { |
| 2195 | /* Not an error */ |
| 2196 | goto end; |
| 2197 | } |
| 2198 | |
| 2199 | /* |
| 2200 | * Move the notification at the tail of the queue to the |
| 2201 | * iterator's current notification. |
| 2202 | */ |
| 2203 | assert(iterator->queue->length > 0); |
| 2204 | bt_put(iterator->current_notification); |
| 2205 | iterator->current_notification = g_queue_pop_tail(iterator->queue); |
| 2206 | assert(iterator->current_notification); |
| 2207 | |
| 2208 | end: |
| 2209 | return status; |
| 2210 | } |
| 2211 | |
| 2212 | struct bt_component *bt_notification_iterator_get_component( |
| 2213 | struct bt_notification_iterator *iterator) |
| 2214 | { |
| 2215 | return bt_get(iterator->upstream_component); |
| 2216 | } |
| 2217 | |
| 2218 | struct bt_private_component * |
| 2219 | bt_private_notification_iterator_get_private_component( |
| 2220 | struct bt_private_notification_iterator *private_iterator) |
| 2221 | { |
| 2222 | return bt_private_component_from_component( |
| 2223 | bt_notification_iterator_get_component( |
| 2224 | bt_notification_iterator_from_private(private_iterator))); |
| 2225 | } |
| 2226 | |
| 2227 | enum bt_notification_iterator_status bt_notification_iterator_seek_time( |
| 2228 | struct bt_notification_iterator *iterator, |
| 2229 | enum bt_notification_iterator_seek_origin seek_origin, |
| 2230 | int64_t time) |
| 2231 | { |
| 2232 | enum bt_notification_iterator_status ret = |
| 2233 | BT_NOTIFICATION_ITERATOR_STATUS_UNSUPPORTED; |
| 2234 | return ret; |
| 2235 | } |