| 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 | #include <babeltrace/compiler-internal.h> |
| 29 | #include <babeltrace/ref.h> |
| 30 | #include <babeltrace/ctf-ir/event-internal.h> |
| 31 | #include <babeltrace/ctf-ir/packet-internal.h> |
| 32 | #include <babeltrace/ctf-ir/stream-internal.h> |
| 33 | #include <babeltrace/graph/component.h> |
| 34 | #include <babeltrace/graph/component-source-internal.h> |
| 35 | #include <babeltrace/graph/component-class-internal.h> |
| 36 | #include <babeltrace/graph/notification.h> |
| 37 | #include <babeltrace/graph/notification-iterator.h> |
| 38 | #include <babeltrace/graph/notification-iterator-internal.h> |
| 39 | #include <babeltrace/graph/notification-internal.h> |
| 40 | #include <babeltrace/graph/notification-event.h> |
| 41 | #include <babeltrace/graph/notification-event-internal.h> |
| 42 | #include <babeltrace/graph/notification-packet.h> |
| 43 | #include <babeltrace/graph/notification-packet-internal.h> |
| 44 | #include <babeltrace/graph/notification-stream.h> |
| 45 | #include <babeltrace/graph/notification-stream-internal.h> |
| 46 | #include <babeltrace/graph/port.h> |
| 47 | #include <stdint.h> |
| 48 | |
| 49 | struct stream_state { |
| 50 | struct bt_ctf_stream *stream; /* owned by this */ |
| 51 | struct bt_ctf_packet *cur_packet; /* owned by this */ |
| 52 | bool is_ended; |
| 53 | }; |
| 54 | |
| 55 | enum action_type { |
| 56 | ACTION_TYPE_PUSH_NOTIF, |
| 57 | ACTION_TYPE_MAP_PORT_TO_COMP_IN_STREAM, |
| 58 | ACTION_TYPE_ADD_STREAM_STATE, |
| 59 | ACTION_TYPE_SET_STREAM_STATE_IS_ENDED, |
| 60 | ACTION_TYPE_SET_STREAM_STATE_CUR_PACKET, |
| 61 | }; |
| 62 | |
| 63 | struct action { |
| 64 | enum action_type type; |
| 65 | union { |
| 66 | /* ACTION_TYPE_PUSH_NOTIF */ |
| 67 | struct { |
| 68 | struct bt_notification *notif; /* owned by this */ |
| 69 | } push_notif; |
| 70 | |
| 71 | /* ACTION_TYPE_MAP_PORT_TO_COMP_IN_STREAM */ |
| 72 | struct { |
| 73 | struct bt_ctf_stream *stream; /* owned by this */ |
| 74 | struct bt_component *component; /* owned by this */ |
| 75 | struct bt_port *port; /* owned by this */ |
| 76 | } map_port_to_comp_in_stream; |
| 77 | |
| 78 | /* ACTION_TYPE_ADD_STREAM_STATE */ |
| 79 | struct { |
| 80 | struct bt_ctf_stream *stream; /* owned by this */ |
| 81 | struct stream_state *stream_state; /* owned by this */ |
| 82 | } add_stream_state; |
| 83 | |
| 84 | /* ACTION_TYPE_SET_STREAM_STATE_IS_ENDED */ |
| 85 | struct { |
| 86 | struct stream_state *stream_state; /* weak */ |
| 87 | } set_stream_state_is_ended; |
| 88 | |
| 89 | /* ACTION_TYPE_SET_STREAM_STATE_CUR_PACKET */ |
| 90 | struct { |
| 91 | struct stream_state *stream_state; /* weak */ |
| 92 | struct bt_ctf_packet *packet; /* owned by this */ |
| 93 | } set_stream_state_cur_packet; |
| 94 | } payload; |
| 95 | }; |
| 96 | |
| 97 | static |
| 98 | void stream_destroy_listener(struct bt_ctf_stream *stream, void *data) |
| 99 | { |
| 100 | struct bt_notification_iterator *iterator = data; |
| 101 | |
| 102 | /* Remove associated stream state */ |
| 103 | g_hash_table_remove(iterator->stream_states, stream); |
| 104 | } |
| 105 | |
| 106 | static |
| 107 | void destroy_stream_state(struct stream_state *stream_state) |
| 108 | { |
| 109 | if (!stream_state) { |
| 110 | return; |
| 111 | } |
| 112 | |
| 113 | bt_put(stream_state->cur_packet); |
| 114 | bt_put(stream_state->stream); |
| 115 | g_free(stream_state); |
| 116 | } |
| 117 | |
| 118 | static |
| 119 | void destroy_action(struct action *action) |
| 120 | { |
| 121 | assert(action); |
| 122 | |
| 123 | switch (action->type) { |
| 124 | case ACTION_TYPE_PUSH_NOTIF: |
| 125 | BT_PUT(action->payload.push_notif.notif); |
| 126 | break; |
| 127 | case ACTION_TYPE_MAP_PORT_TO_COMP_IN_STREAM: |
| 128 | BT_PUT(action->payload.map_port_to_comp_in_stream.stream); |
| 129 | BT_PUT(action->payload.map_port_to_comp_in_stream.component); |
| 130 | BT_PUT(action->payload.map_port_to_comp_in_stream.port); |
| 131 | break; |
| 132 | case ACTION_TYPE_ADD_STREAM_STATE: |
| 133 | BT_PUT(action->payload.add_stream_state.stream); |
| 134 | destroy_stream_state( |
| 135 | action->payload.add_stream_state.stream_state); |
| 136 | action->payload.add_stream_state.stream_state = NULL; |
| 137 | break; |
| 138 | case ACTION_TYPE_SET_STREAM_STATE_CUR_PACKET: |
| 139 | BT_PUT(action->payload.set_stream_state_cur_packet.packet); |
| 140 | break; |
| 141 | case ACTION_TYPE_SET_STREAM_STATE_IS_ENDED: |
| 142 | break; |
| 143 | default: |
| 144 | assert(false); |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | static |
| 149 | void add_action(struct bt_notification_iterator *iterator, |
| 150 | struct action *action) |
| 151 | { |
| 152 | g_array_append_val(iterator->actions, *action); |
| 153 | } |
| 154 | |
| 155 | static |
| 156 | void clear_actions(struct bt_notification_iterator *iterator) |
| 157 | { |
| 158 | size_t i; |
| 159 | |
| 160 | for (i = 0; i < iterator->actions->len; i++) { |
| 161 | struct action *action = &g_array_index(iterator->actions, |
| 162 | struct action, i); |
| 163 | |
| 164 | destroy_action(action); |
| 165 | } |
| 166 | |
| 167 | g_array_set_size(iterator->actions, 0); |
| 168 | } |
| 169 | |
| 170 | static |
| 171 | void apply_actions(struct bt_notification_iterator *iterator) |
| 172 | { |
| 173 | size_t i; |
| 174 | |
| 175 | for (i = 0; i < iterator->actions->len; i++) { |
| 176 | struct action *action = &g_array_index(iterator->actions, |
| 177 | struct action, i); |
| 178 | |
| 179 | switch (action->type) { |
| 180 | case ACTION_TYPE_PUSH_NOTIF: |
| 181 | /* Move notification to queue */ |
| 182 | g_queue_push_head(iterator->queue, |
| 183 | action->payload.push_notif.notif); |
| 184 | bt_notification_freeze( |
| 185 | action->payload.push_notif.notif); |
| 186 | action->payload.push_notif.notif = NULL; |
| 187 | break; |
| 188 | case ACTION_TYPE_MAP_PORT_TO_COMP_IN_STREAM: |
| 189 | bt_ctf_stream_map_component_to_port( |
| 190 | action->payload.map_port_to_comp_in_stream.stream, |
| 191 | action->payload.map_port_to_comp_in_stream.component, |
| 192 | action->payload.map_port_to_comp_in_stream.port); |
| 193 | break; |
| 194 | case ACTION_TYPE_ADD_STREAM_STATE: |
| 195 | /* Move stream state to hash table */ |
| 196 | g_hash_table_insert(iterator->stream_states, |
| 197 | action->payload.add_stream_state.stream, |
| 198 | action->payload.add_stream_state.stream_state); |
| 199 | |
| 200 | action->payload.add_stream_state.stream_state = NULL; |
| 201 | break; |
| 202 | case ACTION_TYPE_SET_STREAM_STATE_IS_ENDED: |
| 203 | /* |
| 204 | * We know that this stream is ended. We need to |
| 205 | * remember this as long as the stream exists to |
| 206 | * enforce that the same stream does not end |
| 207 | * twice. |
| 208 | * |
| 209 | * Here we add a destroy listener to the stream |
| 210 | * which we put after (becomes weak as the hash |
| 211 | * table key). If we were the last object to own |
| 212 | * this stream, the destroy listener is called |
| 213 | * when we call bt_put() which removes this |
| 214 | * stream state completely. This is important |
| 215 | * because the memory used by this stream object |
| 216 | * could be reused for another stream, and they |
| 217 | * must have different states. |
| 218 | */ |
| 219 | bt_ctf_stream_add_destroy_listener( |
| 220 | action->payload.set_stream_state_is_ended.stream_state->stream, |
| 221 | stream_destroy_listener, iterator); |
| 222 | action->payload.set_stream_state_is_ended.stream_state->is_ended = true; |
| 223 | BT_PUT(action->payload.set_stream_state_is_ended.stream_state->stream); |
| 224 | break; |
| 225 | case ACTION_TYPE_SET_STREAM_STATE_CUR_PACKET: |
| 226 | /* Move packet to stream state's current packet */ |
| 227 | BT_MOVE(action->payload.set_stream_state_cur_packet.stream_state->cur_packet, |
| 228 | action->payload.set_stream_state_cur_packet.packet); |
| 229 | break; |
| 230 | default: |
| 231 | assert(false); |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | clear_actions(iterator); |
| 236 | } |
| 237 | |
| 238 | static |
| 239 | struct stream_state *create_stream_state(struct bt_ctf_stream *stream) |
| 240 | { |
| 241 | struct stream_state *stream_state = g_new0(struct stream_state, 1); |
| 242 | |
| 243 | if (!stream_state) { |
| 244 | goto end; |
| 245 | } |
| 246 | |
| 247 | /* |
| 248 | * We keep a reference to the stream until we know it's ended |
| 249 | * because we need to be able to create an automatic "stream |
| 250 | * end" notification when the user's "next" method returns |
| 251 | * BT_NOTIFICATION_ITERATOR_STATUS_END. |
| 252 | * |
| 253 | * We put this reference when the stream is marked as ended. |
| 254 | */ |
| 255 | stream_state->stream = bt_get(stream); |
| 256 | |
| 257 | end: |
| 258 | return stream_state; |
| 259 | } |
| 260 | |
| 261 | static |
| 262 | void bt_notification_iterator_destroy(struct bt_object *obj) |
| 263 | { |
| 264 | struct bt_notification_iterator *iterator; |
| 265 | struct bt_component_class *comp_class; |
| 266 | |
| 267 | assert(obj); |
| 268 | iterator = container_of(obj, struct bt_notification_iterator, |
| 269 | base); |
| 270 | assert(iterator->upstream_component); |
| 271 | comp_class = iterator->upstream_component->class; |
| 272 | |
| 273 | /* Call user-defined destroy method */ |
| 274 | switch (comp_class->type) { |
| 275 | case BT_COMPONENT_CLASS_TYPE_SOURCE: |
| 276 | { |
| 277 | struct bt_component_class_source *source_class; |
| 278 | |
| 279 | source_class = container_of(comp_class, struct bt_component_class_source, parent); |
| 280 | |
| 281 | if (source_class->methods.iterator.finalize) { |
| 282 | source_class->methods.iterator.finalize( |
| 283 | bt_private_notification_iterator_from_notification_iterator(iterator)); |
| 284 | } |
| 285 | break; |
| 286 | } |
| 287 | case BT_COMPONENT_CLASS_TYPE_FILTER: |
| 288 | { |
| 289 | struct bt_component_class_filter *filter_class; |
| 290 | |
| 291 | filter_class = container_of(comp_class, struct bt_component_class_filter, parent); |
| 292 | |
| 293 | if (filter_class->methods.iterator.finalize) { |
| 294 | filter_class->methods.iterator.finalize( |
| 295 | bt_private_notification_iterator_from_notification_iterator(iterator)); |
| 296 | } |
| 297 | break; |
| 298 | } |
| 299 | default: |
| 300 | /* Unreachable */ |
| 301 | assert(0); |
| 302 | } |
| 303 | |
| 304 | if (iterator->queue) { |
| 305 | struct bt_notification *notif; |
| 306 | |
| 307 | while ((notif = g_queue_pop_tail(iterator->queue))) { |
| 308 | bt_put(notif); |
| 309 | } |
| 310 | |
| 311 | g_queue_free(iterator->queue); |
| 312 | } |
| 313 | |
| 314 | if (iterator->stream_states) { |
| 315 | /* |
| 316 | * Remove our destroy listener from each stream which |
| 317 | * has a state in this iterator. Otherwise the destroy |
| 318 | * listener would be called with an invalid/other |
| 319 | * notification iterator object. |
| 320 | */ |
| 321 | GHashTableIter ht_iter; |
| 322 | gpointer stream_gptr, stream_state_gptr; |
| 323 | |
| 324 | g_hash_table_iter_init(&ht_iter, iterator->stream_states); |
| 325 | |
| 326 | while (g_hash_table_iter_next(&ht_iter, &stream_gptr, &stream_state_gptr)) { |
| 327 | assert(stream_gptr); |
| 328 | bt_ctf_stream_remove_destroy_listener( |
| 329 | (void *) stream_gptr, stream_destroy_listener, |
| 330 | iterator); |
| 331 | } |
| 332 | |
| 333 | g_hash_table_destroy(iterator->stream_states); |
| 334 | } |
| 335 | |
| 336 | if (iterator->actions) { |
| 337 | g_array_free(iterator->actions, TRUE); |
| 338 | } |
| 339 | |
| 340 | bt_put(iterator->current_notification); |
| 341 | bt_put(iterator->upstream_component); |
| 342 | bt_put(iterator->upstream_port); |
| 343 | g_free(iterator); |
| 344 | } |
| 345 | |
| 346 | static |
| 347 | int create_subscription_mask_from_notification_types( |
| 348 | struct bt_notification_iterator *iterator, |
| 349 | const enum bt_notification_type *notif_types) |
| 350 | { |
| 351 | const enum bt_notification_type *notif_type; |
| 352 | int ret = 0; |
| 353 | |
| 354 | assert(notif_types); |
| 355 | iterator->subscription_mask = 0; |
| 356 | |
| 357 | for (notif_type = notif_types; |
| 358 | *notif_type != BT_NOTIFICATION_TYPE_SENTINEL; |
| 359 | notif_type++) { |
| 360 | switch (*notif_type) { |
| 361 | case BT_NOTIFICATION_TYPE_ALL: |
| 362 | iterator->subscription_mask |= |
| 363 | BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_EVENT | |
| 364 | BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_INACTIVITY | |
| 365 | BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_STREAM_BEGIN | |
| 366 | BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_STREAM_END | |
| 367 | BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_PACKET_BEGIN | |
| 368 | BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_PACKET_END; |
| 369 | break; |
| 370 | case BT_NOTIFICATION_TYPE_EVENT: |
| 371 | iterator->subscription_mask |= BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_EVENT; |
| 372 | break; |
| 373 | case BT_NOTIFICATION_TYPE_INACTIVITY: |
| 374 | iterator->subscription_mask |= BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_INACTIVITY; |
| 375 | break; |
| 376 | case BT_NOTIFICATION_TYPE_STREAM_BEGIN: |
| 377 | iterator->subscription_mask |= BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_STREAM_BEGIN; |
| 378 | break; |
| 379 | case BT_NOTIFICATION_TYPE_STREAM_END: |
| 380 | iterator->subscription_mask |= BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_STREAM_END; |
| 381 | break; |
| 382 | case BT_NOTIFICATION_TYPE_PACKET_BEGIN: |
| 383 | iterator->subscription_mask |= BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_PACKET_BEGIN; |
| 384 | break; |
| 385 | case BT_NOTIFICATION_TYPE_PACKET_END: |
| 386 | iterator->subscription_mask |= BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_PACKET_END; |
| 387 | break; |
| 388 | default: |
| 389 | ret = -1; |
| 390 | goto end; |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | end: |
| 395 | return ret; |
| 396 | } |
| 397 | |
| 398 | BT_HIDDEN |
| 399 | struct bt_notification_iterator *bt_notification_iterator_create( |
| 400 | struct bt_component *upstream_comp, |
| 401 | struct bt_port *upstream_port, |
| 402 | const enum bt_notification_type *notification_types) |
| 403 | { |
| 404 | enum bt_component_class_type type; |
| 405 | struct bt_notification_iterator *iterator = NULL; |
| 406 | |
| 407 | assert(upstream_comp); |
| 408 | assert(upstream_port); |
| 409 | assert(notification_types); |
| 410 | assert(bt_port_is_connected(upstream_port)); |
| 411 | |
| 412 | type = bt_component_get_class_type(upstream_comp); |
| 413 | switch (type) { |
| 414 | case BT_COMPONENT_CLASS_TYPE_SOURCE: |
| 415 | case BT_COMPONENT_CLASS_TYPE_FILTER: |
| 416 | break; |
| 417 | default: |
| 418 | goto error; |
| 419 | } |
| 420 | |
| 421 | iterator = g_new0(struct bt_notification_iterator, 1); |
| 422 | if (!iterator) { |
| 423 | goto error; |
| 424 | } |
| 425 | |
| 426 | bt_object_init(iterator, bt_notification_iterator_destroy); |
| 427 | |
| 428 | if (create_subscription_mask_from_notification_types(iterator, |
| 429 | notification_types)) { |
| 430 | goto error; |
| 431 | } |
| 432 | |
| 433 | iterator->stream_states = g_hash_table_new_full(g_direct_hash, |
| 434 | g_direct_equal, NULL, (GDestroyNotify) destroy_stream_state); |
| 435 | if (!iterator->stream_states) { |
| 436 | goto error; |
| 437 | } |
| 438 | |
| 439 | iterator->queue = g_queue_new(); |
| 440 | if (!iterator->queue) { |
| 441 | goto error; |
| 442 | } |
| 443 | |
| 444 | iterator->actions = g_array_new(FALSE, FALSE, sizeof(struct action)); |
| 445 | if (!iterator->actions) { |
| 446 | goto error; |
| 447 | } |
| 448 | |
| 449 | iterator->upstream_component = bt_get(upstream_comp); |
| 450 | iterator->upstream_port = bt_get(upstream_port); |
| 451 | goto end; |
| 452 | |
| 453 | error: |
| 454 | BT_PUT(iterator); |
| 455 | |
| 456 | end: |
| 457 | return iterator; |
| 458 | } |
| 459 | |
| 460 | BT_HIDDEN |
| 461 | enum bt_notification_iterator_status bt_notification_iterator_validate( |
| 462 | struct bt_notification_iterator *iterator) |
| 463 | { |
| 464 | enum bt_notification_iterator_status ret = |
| 465 | BT_NOTIFICATION_ITERATOR_STATUS_OK; |
| 466 | |
| 467 | if (!iterator) { |
| 468 | ret = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; |
| 469 | goto end; |
| 470 | } |
| 471 | end: |
| 472 | return ret; |
| 473 | } |
| 474 | |
| 475 | void *bt_private_notification_iterator_get_user_data( |
| 476 | struct bt_private_notification_iterator *private_iterator) |
| 477 | { |
| 478 | struct bt_notification_iterator *iterator = |
| 479 | bt_notification_iterator_from_private(private_iterator); |
| 480 | |
| 481 | return iterator ? iterator->user_data : NULL; |
| 482 | } |
| 483 | |
| 484 | enum bt_notification_iterator_status |
| 485 | bt_private_notification_iterator_set_user_data( |
| 486 | struct bt_private_notification_iterator *private_iterator, |
| 487 | void *data) |
| 488 | { |
| 489 | enum bt_notification_iterator_status ret = |
| 490 | BT_NOTIFICATION_ITERATOR_STATUS_OK; |
| 491 | struct bt_notification_iterator *iterator = |
| 492 | bt_notification_iterator_from_private(private_iterator); |
| 493 | |
| 494 | if (!iterator) { |
| 495 | ret = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; |
| 496 | goto end; |
| 497 | } |
| 498 | |
| 499 | iterator->user_data = data; |
| 500 | end: |
| 501 | return ret; |
| 502 | } |
| 503 | |
| 504 | struct bt_notification *bt_notification_iterator_get_notification( |
| 505 | struct bt_notification_iterator *iterator) |
| 506 | { |
| 507 | struct bt_notification *notification = NULL; |
| 508 | |
| 509 | if (!iterator) { |
| 510 | goto end; |
| 511 | } |
| 512 | |
| 513 | notification = bt_get(iterator->current_notification); |
| 514 | |
| 515 | end: |
| 516 | return notification; |
| 517 | } |
| 518 | |
| 519 | static |
| 520 | enum bt_notification_iterator_notif_type |
| 521 | bt_notification_iterator_notif_type_from_notif_type( |
| 522 | enum bt_notification_type notif_type) |
| 523 | { |
| 524 | enum bt_notification_iterator_notif_type iter_notif_type; |
| 525 | |
| 526 | switch (notif_type) { |
| 527 | case BT_NOTIFICATION_TYPE_EVENT: |
| 528 | iter_notif_type = BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_EVENT; |
| 529 | break; |
| 530 | case BT_NOTIFICATION_TYPE_INACTIVITY: |
| 531 | iter_notif_type = BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_INACTIVITY; |
| 532 | break; |
| 533 | case BT_NOTIFICATION_TYPE_STREAM_BEGIN: |
| 534 | iter_notif_type = BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_STREAM_BEGIN; |
| 535 | break; |
| 536 | case BT_NOTIFICATION_TYPE_STREAM_END: |
| 537 | iter_notif_type = BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_STREAM_END; |
| 538 | break; |
| 539 | case BT_NOTIFICATION_TYPE_PACKET_BEGIN: |
| 540 | iter_notif_type = BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_PACKET_BEGIN; |
| 541 | break; |
| 542 | case BT_NOTIFICATION_TYPE_PACKET_END: |
| 543 | iter_notif_type = BT_NOTIFICATION_ITERATOR_NOTIF_TYPE_PACKET_END; |
| 544 | break; |
| 545 | default: |
| 546 | assert(false); |
| 547 | } |
| 548 | |
| 549 | return iter_notif_type; |
| 550 | } |
| 551 | |
| 552 | static |
| 553 | bool validate_notification(struct bt_notification_iterator *iterator, |
| 554 | struct bt_notification *notif, |
| 555 | struct bt_ctf_stream *notif_stream, |
| 556 | struct bt_ctf_packet *notif_packet) |
| 557 | { |
| 558 | bool is_valid = true; |
| 559 | struct stream_state *stream_state; |
| 560 | struct bt_port *stream_comp_cur_port; |
| 561 | |
| 562 | assert(notif_stream); |
| 563 | stream_comp_cur_port = |
| 564 | bt_ctf_stream_port_for_component(notif_stream, |
| 565 | iterator->upstream_component); |
| 566 | if (!stream_comp_cur_port) { |
| 567 | /* |
| 568 | * This is the first time this notification iterator |
| 569 | * bumps into this stream. Add an action to map the |
| 570 | * iterator's upstream component to the iterator's |
| 571 | * upstream port in this stream. |
| 572 | */ |
| 573 | struct action action = { |
| 574 | .type = ACTION_TYPE_MAP_PORT_TO_COMP_IN_STREAM, |
| 575 | .payload.map_port_to_comp_in_stream = { |
| 576 | .stream = bt_get(notif_stream), |
| 577 | .component = bt_get(iterator->upstream_component), |
| 578 | .port = bt_get(iterator->upstream_port), |
| 579 | }, |
| 580 | }; |
| 581 | |
| 582 | add_action(iterator, &action); |
| 583 | } else { |
| 584 | if (stream_comp_cur_port != iterator->upstream_port) { |
| 585 | /* |
| 586 | * It looks like two different ports of the same |
| 587 | * component are emitting notifications which |
| 588 | * have references to the same stream. This is |
| 589 | * bad: the API guarantees that it can never |
| 590 | * happen. |
| 591 | */ |
| 592 | is_valid = false; |
| 593 | goto end; |
| 594 | } |
| 595 | |
| 596 | } |
| 597 | |
| 598 | stream_state = g_hash_table_lookup(iterator->stream_states, |
| 599 | notif_stream); |
| 600 | if (stream_state) { |
| 601 | if (stream_state->is_ended) { |
| 602 | /* |
| 603 | * There's a new notification which has a |
| 604 | * reference to a stream which, from this |
| 605 | * iterator's point of view, is ended ("end of |
| 606 | * stream" notification was returned). This is |
| 607 | * bad: the API guarantees that it can never |
| 608 | * happen. |
| 609 | */ |
| 610 | is_valid = false; |
| 611 | goto end; |
| 612 | } |
| 613 | |
| 614 | switch (notif->type) { |
| 615 | case BT_NOTIFICATION_TYPE_STREAM_BEGIN: |
| 616 | /* |
| 617 | * We already have a stream state, which means |
| 618 | * we already returned a "stream begin" |
| 619 | * notification: this is an invalid duplicate. |
| 620 | */ |
| 621 | is_valid = false; |
| 622 | goto end; |
| 623 | case BT_NOTIFICATION_TYPE_PACKET_BEGIN: |
| 624 | if (notif_packet == stream_state->cur_packet) { |
| 625 | /* Duplicate "packet begin" notification */ |
| 626 | is_valid = false; |
| 627 | goto end; |
| 628 | } |
| 629 | break; |
| 630 | default: |
| 631 | break; |
| 632 | } |
| 633 | } |
| 634 | |
| 635 | end: |
| 636 | return is_valid; |
| 637 | } |
| 638 | |
| 639 | static |
| 640 | bool is_subscribed_to_notification_type(struct bt_notification_iterator *iterator, |
| 641 | enum bt_notification_type notif_type) |
| 642 | { |
| 643 | uint32_t iter_notif_type = |
| 644 | (uint32_t) bt_notification_iterator_notif_type_from_notif_type( |
| 645 | notif_type); |
| 646 | |
| 647 | return (iter_notif_type & iterator->subscription_mask) ? true : false; |
| 648 | } |
| 649 | |
| 650 | static |
| 651 | void add_action_push_notif(struct bt_notification_iterator *iterator, |
| 652 | struct bt_notification *notif) |
| 653 | { |
| 654 | struct action action = { |
| 655 | .type = ACTION_TYPE_PUSH_NOTIF, |
| 656 | }; |
| 657 | |
| 658 | assert(notif); |
| 659 | |
| 660 | if (!is_subscribed_to_notification_type(iterator, notif->type)) { |
| 661 | return; |
| 662 | } |
| 663 | |
| 664 | action.payload.push_notif.notif = bt_get(notif); |
| 665 | add_action(iterator, &action); |
| 666 | } |
| 667 | |
| 668 | static |
| 669 | int add_action_push_notif_stream_begin( |
| 670 | struct bt_notification_iterator *iterator, |
| 671 | struct bt_ctf_stream *stream) |
| 672 | { |
| 673 | int ret = 0; |
| 674 | struct bt_notification *stream_begin_notif = NULL; |
| 675 | |
| 676 | if (!is_subscribed_to_notification_type(iterator, |
| 677 | BT_NOTIFICATION_TYPE_STREAM_BEGIN)) { |
| 678 | goto end; |
| 679 | } |
| 680 | |
| 681 | assert(stream); |
| 682 | stream_begin_notif = bt_notification_stream_begin_create(stream); |
| 683 | if (!stream_begin_notif) { |
| 684 | goto error; |
| 685 | } |
| 686 | |
| 687 | add_action_push_notif(iterator, stream_begin_notif); |
| 688 | goto end; |
| 689 | |
| 690 | error: |
| 691 | ret = -1; |
| 692 | |
| 693 | end: |
| 694 | bt_put(stream_begin_notif); |
| 695 | return ret; |
| 696 | } |
| 697 | |
| 698 | static |
| 699 | int add_action_push_notif_stream_end( |
| 700 | struct bt_notification_iterator *iterator, |
| 701 | struct bt_ctf_stream *stream) |
| 702 | { |
| 703 | int ret = 0; |
| 704 | struct bt_notification *stream_end_notif = NULL; |
| 705 | |
| 706 | if (!is_subscribed_to_notification_type(iterator, |
| 707 | BT_NOTIFICATION_TYPE_STREAM_END)) { |
| 708 | goto end; |
| 709 | } |
| 710 | |
| 711 | assert(stream); |
| 712 | stream_end_notif = bt_notification_stream_end_create(stream); |
| 713 | if (!stream_end_notif) { |
| 714 | goto error; |
| 715 | } |
| 716 | |
| 717 | add_action_push_notif(iterator, stream_end_notif); |
| 718 | goto end; |
| 719 | |
| 720 | error: |
| 721 | ret = -1; |
| 722 | |
| 723 | end: |
| 724 | bt_put(stream_end_notif); |
| 725 | return ret; |
| 726 | } |
| 727 | |
| 728 | static |
| 729 | int add_action_push_notif_packet_begin( |
| 730 | struct bt_notification_iterator *iterator, |
| 731 | struct bt_ctf_packet *packet) |
| 732 | { |
| 733 | int ret = 0; |
| 734 | struct bt_notification *packet_begin_notif = NULL; |
| 735 | |
| 736 | if (!is_subscribed_to_notification_type(iterator, |
| 737 | BT_NOTIFICATION_TYPE_PACKET_BEGIN)) { |
| 738 | goto end; |
| 739 | } |
| 740 | |
| 741 | assert(packet); |
| 742 | packet_begin_notif = bt_notification_packet_begin_create(packet); |
| 743 | if (!packet_begin_notif) { |
| 744 | goto error; |
| 745 | } |
| 746 | |
| 747 | add_action_push_notif(iterator, packet_begin_notif); |
| 748 | goto end; |
| 749 | |
| 750 | error: |
| 751 | ret = -1; |
| 752 | |
| 753 | end: |
| 754 | bt_put(packet_begin_notif); |
| 755 | return ret; |
| 756 | } |
| 757 | |
| 758 | static |
| 759 | int add_action_push_notif_packet_end( |
| 760 | struct bt_notification_iterator *iterator, |
| 761 | struct bt_ctf_packet *packet) |
| 762 | { |
| 763 | int ret = 0; |
| 764 | struct bt_notification *packet_end_notif = NULL; |
| 765 | |
| 766 | if (!is_subscribed_to_notification_type(iterator, |
| 767 | BT_NOTIFICATION_TYPE_PACKET_END)) { |
| 768 | goto end; |
| 769 | } |
| 770 | |
| 771 | assert(packet); |
| 772 | packet_end_notif = bt_notification_packet_end_create(packet); |
| 773 | if (!packet_end_notif) { |
| 774 | goto error; |
| 775 | } |
| 776 | |
| 777 | add_action_push_notif(iterator, packet_end_notif); |
| 778 | goto end; |
| 779 | |
| 780 | error: |
| 781 | ret = -1; |
| 782 | |
| 783 | end: |
| 784 | bt_put(packet_end_notif); |
| 785 | return ret; |
| 786 | } |
| 787 | |
| 788 | static |
| 789 | void add_action_set_stream_state_is_ended( |
| 790 | struct bt_notification_iterator *iterator, |
| 791 | struct stream_state *stream_state) |
| 792 | { |
| 793 | struct action action = { |
| 794 | .type = ACTION_TYPE_SET_STREAM_STATE_IS_ENDED, |
| 795 | .payload.set_stream_state_is_ended = { |
| 796 | .stream_state = stream_state, |
| 797 | }, |
| 798 | }; |
| 799 | |
| 800 | assert(stream_state); |
| 801 | add_action(iterator, &action); |
| 802 | } |
| 803 | |
| 804 | static |
| 805 | void add_action_set_stream_state_cur_packet( |
| 806 | struct bt_notification_iterator *iterator, |
| 807 | struct stream_state *stream_state, |
| 808 | struct bt_ctf_packet *packet) |
| 809 | { |
| 810 | struct action action = { |
| 811 | .type = ACTION_TYPE_SET_STREAM_STATE_CUR_PACKET, |
| 812 | .payload.set_stream_state_cur_packet = { |
| 813 | .stream_state = stream_state, |
| 814 | .packet = bt_get(packet), |
| 815 | }, |
| 816 | }; |
| 817 | |
| 818 | assert(stream_state); |
| 819 | add_action(iterator, &action); |
| 820 | } |
| 821 | |
| 822 | static |
| 823 | int ensure_stream_state_exists(struct bt_notification_iterator *iterator, |
| 824 | struct bt_notification *stream_begin_notif, |
| 825 | struct bt_ctf_stream *notif_stream, |
| 826 | struct stream_state **stream_state) |
| 827 | { |
| 828 | int ret = 0; |
| 829 | |
| 830 | if (!notif_stream) { |
| 831 | /* |
| 832 | * The notification does not reference any stream: no |
| 833 | * need to get or create a stream state. |
| 834 | */ |
| 835 | goto end; |
| 836 | } |
| 837 | |
| 838 | *stream_state = g_hash_table_lookup(iterator->stream_states, |
| 839 | notif_stream); |
| 840 | if (!*stream_state) { |
| 841 | /* |
| 842 | * This iterator did not bump into this stream yet: |
| 843 | * create a stream state and a "stream begin" |
| 844 | * notification. |
| 845 | */ |
| 846 | struct action action = { |
| 847 | .type = ACTION_TYPE_ADD_STREAM_STATE, |
| 848 | .payload.add_stream_state = { |
| 849 | .stream = bt_get(notif_stream), |
| 850 | .stream_state = NULL, |
| 851 | }, |
| 852 | }; |
| 853 | |
| 854 | *stream_state = create_stream_state(notif_stream); |
| 855 | if (!stream_state) { |
| 856 | goto error; |
| 857 | } |
| 858 | |
| 859 | action.payload.add_stream_state.stream_state = |
| 860 | *stream_state; |
| 861 | add_action(iterator, &action); |
| 862 | |
| 863 | if (stream_begin_notif) { |
| 864 | add_action_push_notif(iterator, stream_begin_notif); |
| 865 | } else { |
| 866 | ret = add_action_push_notif_stream_begin(iterator, |
| 867 | notif_stream); |
| 868 | if (ret) { |
| 869 | goto error; |
| 870 | } |
| 871 | } |
| 872 | } |
| 873 | |
| 874 | goto end; |
| 875 | |
| 876 | error: |
| 877 | destroy_stream_state(*stream_state); |
| 878 | ret = -1; |
| 879 | |
| 880 | end: |
| 881 | return ret; |
| 882 | } |
| 883 | |
| 884 | static |
| 885 | int handle_packet_switch(struct bt_notification_iterator *iterator, |
| 886 | struct bt_notification *packet_begin_notif, |
| 887 | struct bt_ctf_packet *new_packet, |
| 888 | struct stream_state *stream_state) |
| 889 | { |
| 890 | int ret = 0; |
| 891 | |
| 892 | if (stream_state->cur_packet == new_packet) { |
| 893 | goto end; |
| 894 | } |
| 895 | |
| 896 | if (stream_state->cur_packet) { |
| 897 | /* End of the current packet */ |
| 898 | ret = add_action_push_notif_packet_end(iterator, |
| 899 | stream_state->cur_packet); |
| 900 | if (ret) { |
| 901 | goto error; |
| 902 | } |
| 903 | } |
| 904 | |
| 905 | /* Beginning of the new packet */ |
| 906 | if (packet_begin_notif) { |
| 907 | add_action_push_notif(iterator, packet_begin_notif); |
| 908 | } else if (new_packet) { |
| 909 | ret = add_action_push_notif_packet_begin(iterator, |
| 910 | new_packet); |
| 911 | if (ret) { |
| 912 | goto error; |
| 913 | } |
| 914 | } |
| 915 | |
| 916 | add_action_set_stream_state_cur_packet(iterator, stream_state, |
| 917 | new_packet); |
| 918 | goto end; |
| 919 | |
| 920 | error: |
| 921 | ret = -1; |
| 922 | |
| 923 | end: |
| 924 | return ret; |
| 925 | } |
| 926 | |
| 927 | static |
| 928 | int handle_notif_stream_begin( |
| 929 | struct bt_notification_iterator *iterator, |
| 930 | struct bt_notification *notif, |
| 931 | struct bt_ctf_stream *notif_stream) |
| 932 | { |
| 933 | int ret = 0; |
| 934 | struct stream_state *stream_state; |
| 935 | |
| 936 | assert(notif->type == BT_NOTIFICATION_TYPE_STREAM_BEGIN); |
| 937 | assert(notif_stream); |
| 938 | ret = ensure_stream_state_exists(iterator, notif, notif_stream, |
| 939 | &stream_state); |
| 940 | if (ret) { |
| 941 | goto error; |
| 942 | } |
| 943 | |
| 944 | goto end; |
| 945 | |
| 946 | error: |
| 947 | ret = -1; |
| 948 | |
| 949 | end: |
| 950 | return ret; |
| 951 | } |
| 952 | |
| 953 | static |
| 954 | int handle_notif_stream_end( |
| 955 | struct bt_notification_iterator *iterator, |
| 956 | struct bt_notification *notif, |
| 957 | struct bt_ctf_stream *notif_stream) |
| 958 | { |
| 959 | int ret = 0; |
| 960 | struct stream_state *stream_state; |
| 961 | |
| 962 | assert(notif->type == BT_NOTIFICATION_TYPE_STREAM_END); |
| 963 | assert(notif_stream); |
| 964 | ret = ensure_stream_state_exists(iterator, NULL, notif_stream, |
| 965 | &stream_state); |
| 966 | if (ret) { |
| 967 | goto error; |
| 968 | } |
| 969 | |
| 970 | ret = handle_packet_switch(iterator, NULL, NULL, stream_state); |
| 971 | if (ret) { |
| 972 | goto error; |
| 973 | } |
| 974 | |
| 975 | add_action_push_notif(iterator, notif); |
| 976 | add_action_set_stream_state_is_ended(iterator, stream_state); |
| 977 | goto end; |
| 978 | |
| 979 | error: |
| 980 | ret = -1; |
| 981 | |
| 982 | end: |
| 983 | return ret; |
| 984 | } |
| 985 | |
| 986 | static |
| 987 | int handle_notif_packet_begin( |
| 988 | struct bt_notification_iterator *iterator, |
| 989 | struct bt_notification *notif, |
| 990 | struct bt_ctf_stream *notif_stream, |
| 991 | struct bt_ctf_packet *notif_packet) |
| 992 | { |
| 993 | int ret = 0; |
| 994 | struct stream_state *stream_state; |
| 995 | |
| 996 | assert(notif->type == BT_NOTIFICATION_TYPE_PACKET_BEGIN); |
| 997 | assert(notif_packet); |
| 998 | ret = ensure_stream_state_exists(iterator, NULL, notif_stream, |
| 999 | &stream_state); |
| 1000 | if (ret) { |
| 1001 | goto error; |
| 1002 | } |
| 1003 | |
| 1004 | ret = handle_packet_switch(iterator, notif, notif_packet, stream_state); |
| 1005 | if (ret) { |
| 1006 | goto error; |
| 1007 | } |
| 1008 | |
| 1009 | goto end; |
| 1010 | |
| 1011 | error: |
| 1012 | ret = -1; |
| 1013 | |
| 1014 | end: |
| 1015 | return ret; |
| 1016 | } |
| 1017 | |
| 1018 | static |
| 1019 | int handle_notif_packet_end( |
| 1020 | struct bt_notification_iterator *iterator, |
| 1021 | struct bt_notification *notif, |
| 1022 | struct bt_ctf_stream *notif_stream, |
| 1023 | struct bt_ctf_packet *notif_packet) |
| 1024 | { |
| 1025 | int ret = 0; |
| 1026 | struct stream_state *stream_state; |
| 1027 | |
| 1028 | assert(notif->type == BT_NOTIFICATION_TYPE_PACKET_END); |
| 1029 | assert(notif_packet); |
| 1030 | ret = ensure_stream_state_exists(iterator, NULL, notif_stream, |
| 1031 | &stream_state); |
| 1032 | if (ret) { |
| 1033 | goto error; |
| 1034 | } |
| 1035 | |
| 1036 | ret = handle_packet_switch(iterator, NULL, notif_packet, stream_state); |
| 1037 | if (ret) { |
| 1038 | goto error; |
| 1039 | } |
| 1040 | |
| 1041 | /* End of the current packet */ |
| 1042 | add_action_push_notif(iterator, notif); |
| 1043 | add_action_set_stream_state_cur_packet(iterator, stream_state, NULL); |
| 1044 | goto end; |
| 1045 | |
| 1046 | error: |
| 1047 | ret = -1; |
| 1048 | |
| 1049 | end: |
| 1050 | return ret; |
| 1051 | } |
| 1052 | |
| 1053 | static |
| 1054 | int handle_notif_event( |
| 1055 | struct bt_notification_iterator *iterator, |
| 1056 | struct bt_notification *notif, |
| 1057 | struct bt_ctf_stream *notif_stream, |
| 1058 | struct bt_ctf_packet *notif_packet) |
| 1059 | { |
| 1060 | int ret = 0; |
| 1061 | struct stream_state *stream_state; |
| 1062 | |
| 1063 | assert(notif->type == BT_NOTIFICATION_TYPE_EVENT); |
| 1064 | assert(notif_packet); |
| 1065 | ret = ensure_stream_state_exists(iterator, NULL, notif_stream, |
| 1066 | &stream_state); |
| 1067 | if (ret) { |
| 1068 | goto error; |
| 1069 | } |
| 1070 | |
| 1071 | ret = handle_packet_switch(iterator, NULL, notif_packet, stream_state); |
| 1072 | if (ret) { |
| 1073 | goto error; |
| 1074 | } |
| 1075 | |
| 1076 | add_action_push_notif(iterator, notif); |
| 1077 | goto end; |
| 1078 | |
| 1079 | error: |
| 1080 | ret = -1; |
| 1081 | |
| 1082 | end: |
| 1083 | return ret; |
| 1084 | } |
| 1085 | |
| 1086 | static |
| 1087 | int enqueue_notification_and_automatic( |
| 1088 | struct bt_notification_iterator *iterator, |
| 1089 | struct bt_notification *notif) |
| 1090 | { |
| 1091 | int ret = 0; |
| 1092 | struct bt_ctf_event *notif_event = NULL; |
| 1093 | struct bt_ctf_stream *notif_stream = NULL; |
| 1094 | struct bt_ctf_packet *notif_packet = NULL; |
| 1095 | |
| 1096 | assert(notif); |
| 1097 | |
| 1098 | // TODO: Skip most of this if the iterator is only subscribed |
| 1099 | // to event/inactivity notifications. |
| 1100 | |
| 1101 | /* Get the stream and packet referred by the notification */ |
| 1102 | switch (notif->type) { |
| 1103 | case BT_NOTIFICATION_TYPE_EVENT: |
| 1104 | notif_event = bt_notification_event_borrow_event(notif); |
| 1105 | assert(notif_event); |
| 1106 | notif_packet = bt_ctf_event_borrow_packet(notif_event); |
| 1107 | assert(notif_packet); |
| 1108 | break; |
| 1109 | case BT_NOTIFICATION_TYPE_STREAM_BEGIN: |
| 1110 | notif_stream = |
| 1111 | bt_notification_stream_begin_borrow_stream(notif); |
| 1112 | assert(notif_stream); |
| 1113 | break; |
| 1114 | case BT_NOTIFICATION_TYPE_STREAM_END: |
| 1115 | notif_stream = bt_notification_stream_end_borrow_stream(notif); |
| 1116 | assert(notif_stream); |
| 1117 | break; |
| 1118 | case BT_NOTIFICATION_TYPE_PACKET_BEGIN: |
| 1119 | notif_packet = |
| 1120 | bt_notification_packet_begin_borrow_packet(notif); |
| 1121 | assert(notif_packet); |
| 1122 | break; |
| 1123 | case BT_NOTIFICATION_TYPE_PACKET_END: |
| 1124 | notif_packet = bt_notification_packet_end_borrow_packet(notif); |
| 1125 | assert(notif_packet); |
| 1126 | break; |
| 1127 | case BT_NOTIFICATION_TYPE_INACTIVITY: |
| 1128 | /* Always valid */ |
| 1129 | break; |
| 1130 | default: |
| 1131 | /* |
| 1132 | * Invalid type of notification. Only the notification |
| 1133 | * types above are allowed to be returned by a user |
| 1134 | * component. |
| 1135 | */ |
| 1136 | goto error; |
| 1137 | } |
| 1138 | |
| 1139 | if (notif_packet) { |
| 1140 | notif_stream = bt_ctf_packet_borrow_stream(notif_packet); |
| 1141 | assert(notif_stream); |
| 1142 | } |
| 1143 | |
| 1144 | if (!notif_stream) { |
| 1145 | /* |
| 1146 | * The notification has no reference to a stream: it |
| 1147 | * cannot cause the creation of automatic notifications. |
| 1148 | */ |
| 1149 | goto end; |
| 1150 | } |
| 1151 | |
| 1152 | if (!validate_notification(iterator, notif, notif_stream, |
| 1153 | notif_packet)) { |
| 1154 | goto error; |
| 1155 | } |
| 1156 | |
| 1157 | switch (notif->type) { |
| 1158 | case BT_NOTIFICATION_TYPE_EVENT: |
| 1159 | ret = handle_notif_event(iterator, notif, notif_stream, |
| 1160 | notif_packet); |
| 1161 | break; |
| 1162 | case BT_NOTIFICATION_TYPE_STREAM_BEGIN: |
| 1163 | ret = handle_notif_stream_begin(iterator, notif, notif_stream); |
| 1164 | break; |
| 1165 | case BT_NOTIFICATION_TYPE_STREAM_END: |
| 1166 | ret = handle_notif_stream_end(iterator, notif, notif_stream); |
| 1167 | break; |
| 1168 | case BT_NOTIFICATION_TYPE_PACKET_BEGIN: |
| 1169 | ret = handle_notif_packet_begin(iterator, notif, notif_stream, |
| 1170 | notif_packet); |
| 1171 | break; |
| 1172 | case BT_NOTIFICATION_TYPE_PACKET_END: |
| 1173 | ret = handle_notif_packet_end(iterator, notif, notif_stream, |
| 1174 | notif_packet); |
| 1175 | break; |
| 1176 | default: |
| 1177 | break; |
| 1178 | } |
| 1179 | |
| 1180 | if (ret) { |
| 1181 | goto error; |
| 1182 | } |
| 1183 | |
| 1184 | apply_actions(iterator); |
| 1185 | goto end; |
| 1186 | |
| 1187 | error: |
| 1188 | ret = -1; |
| 1189 | |
| 1190 | end: |
| 1191 | return ret; |
| 1192 | } |
| 1193 | |
| 1194 | static |
| 1195 | int handle_end(struct bt_notification_iterator *iterator) |
| 1196 | { |
| 1197 | GHashTableIter stream_state_iter; |
| 1198 | gpointer stream_gptr, stream_state_gptr; |
| 1199 | int ret = 0; |
| 1200 | |
| 1201 | /* |
| 1202 | * Emit a "stream end" notification for each non-ended stream |
| 1203 | * known by this iterator and mark them as ended. |
| 1204 | */ |
| 1205 | g_hash_table_iter_init(&stream_state_iter, iterator->stream_states); |
| 1206 | |
| 1207 | while (g_hash_table_iter_next(&stream_state_iter, &stream_gptr, |
| 1208 | &stream_state_gptr)) { |
| 1209 | struct stream_state *stream_state = stream_state_gptr; |
| 1210 | |
| 1211 | assert(stream_state_gptr); |
| 1212 | |
| 1213 | if (stream_state->is_ended) { |
| 1214 | continue; |
| 1215 | } |
| 1216 | |
| 1217 | ret = handle_packet_switch(iterator, NULL, NULL, stream_state); |
| 1218 | if (ret) { |
| 1219 | goto error; |
| 1220 | } |
| 1221 | |
| 1222 | ret = add_action_push_notif_stream_end(iterator, stream_gptr); |
| 1223 | if (ret) { |
| 1224 | goto error; |
| 1225 | } |
| 1226 | |
| 1227 | add_action_set_stream_state_is_ended(iterator, stream_state); |
| 1228 | } |
| 1229 | |
| 1230 | apply_actions(iterator); |
| 1231 | goto end; |
| 1232 | |
| 1233 | error: |
| 1234 | ret = -1; |
| 1235 | |
| 1236 | end: |
| 1237 | return ret; |
| 1238 | } |
| 1239 | |
| 1240 | static |
| 1241 | enum bt_notification_iterator_status ensure_queue_has_notifications( |
| 1242 | struct bt_notification_iterator *iterator) |
| 1243 | { |
| 1244 | struct bt_private_notification_iterator *priv_iterator = |
| 1245 | bt_private_notification_iterator_from_notification_iterator(iterator); |
| 1246 | bt_component_class_notification_iterator_next_method next_method = NULL; |
| 1247 | struct bt_notification_iterator_next_return next_return = { |
| 1248 | .status = BT_NOTIFICATION_ITERATOR_STATUS_OK, |
| 1249 | .notification = NULL, |
| 1250 | }; |
| 1251 | enum bt_notification_iterator_status status = |
| 1252 | BT_NOTIFICATION_ITERATOR_STATUS_OK; |
| 1253 | int ret; |
| 1254 | |
| 1255 | assert(iterator); |
| 1256 | |
| 1257 | if (iterator->queue->length > 0) { |
| 1258 | /* We already have enough */ |
| 1259 | goto end; |
| 1260 | } |
| 1261 | |
| 1262 | if (iterator->is_ended) { |
| 1263 | status = BT_NOTIFICATION_ITERATOR_STATUS_END; |
| 1264 | goto end; |
| 1265 | } |
| 1266 | |
| 1267 | assert(iterator->upstream_component); |
| 1268 | assert(iterator->upstream_component->class); |
| 1269 | |
| 1270 | /* Pick the appropriate "next" method */ |
| 1271 | switch (iterator->upstream_component->class->type) { |
| 1272 | case BT_COMPONENT_CLASS_TYPE_SOURCE: |
| 1273 | { |
| 1274 | struct bt_component_class_source *source_class = |
| 1275 | container_of(iterator->upstream_component->class, |
| 1276 | struct bt_component_class_source, parent); |
| 1277 | |
| 1278 | assert(source_class->methods.iterator.next); |
| 1279 | next_method = source_class->methods.iterator.next; |
| 1280 | break; |
| 1281 | } |
| 1282 | case BT_COMPONENT_CLASS_TYPE_FILTER: |
| 1283 | { |
| 1284 | struct bt_component_class_filter *filter_class = |
| 1285 | container_of(iterator->upstream_component->class, |
| 1286 | struct bt_component_class_filter, parent); |
| 1287 | |
| 1288 | assert(filter_class->methods.iterator.next); |
| 1289 | next_method = filter_class->methods.iterator.next; |
| 1290 | break; |
| 1291 | } |
| 1292 | default: |
| 1293 | assert(false); |
| 1294 | break; |
| 1295 | } |
| 1296 | |
| 1297 | /* |
| 1298 | * Call the user's "next" method to get the next notification |
| 1299 | * and status. |
| 1300 | */ |
| 1301 | assert(next_method); |
| 1302 | |
| 1303 | while (iterator->queue->length == 0) { |
| 1304 | next_return = next_method(priv_iterator); |
| 1305 | if (next_return.status < 0) { |
| 1306 | status = next_return.status; |
| 1307 | goto end; |
| 1308 | } |
| 1309 | |
| 1310 | switch (next_return.status) { |
| 1311 | case BT_NOTIFICATION_ITERATOR_STATUS_END: |
| 1312 | ret = handle_end(iterator); |
| 1313 | if (ret) { |
| 1314 | status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; |
| 1315 | goto end; |
| 1316 | } |
| 1317 | |
| 1318 | if (iterator->queue->length == 0) { |
| 1319 | status = BT_NOTIFICATION_ITERATOR_STATUS_END; |
| 1320 | } |
| 1321 | |
| 1322 | iterator->is_ended = true; |
| 1323 | goto end; |
| 1324 | case BT_NOTIFICATION_ITERATOR_STATUS_AGAIN: |
| 1325 | status = BT_NOTIFICATION_ITERATOR_STATUS_AGAIN; |
| 1326 | goto end; |
| 1327 | case BT_NOTIFICATION_ITERATOR_STATUS_OK: |
| 1328 | if (!next_return.notification) { |
| 1329 | status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; |
| 1330 | goto end; |
| 1331 | } |
| 1332 | |
| 1333 | /* |
| 1334 | * We know the notification is valid. Before we |
| 1335 | * push it to the head of the queue, push the |
| 1336 | * appropriate automatic notifications if any. |
| 1337 | */ |
| 1338 | ret = enqueue_notification_and_automatic(iterator, |
| 1339 | next_return.notification); |
| 1340 | BT_PUT(next_return.notification); |
| 1341 | if (ret) { |
| 1342 | status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; |
| 1343 | goto end; |
| 1344 | } |
| 1345 | break; |
| 1346 | default: |
| 1347 | /* Unknown non-error status */ |
| 1348 | assert(false); |
| 1349 | } |
| 1350 | } |
| 1351 | |
| 1352 | end: |
| 1353 | return status; |
| 1354 | } |
| 1355 | |
| 1356 | enum bt_notification_iterator_status |
| 1357 | bt_notification_iterator_next(struct bt_notification_iterator *iterator) |
| 1358 | { |
| 1359 | enum bt_notification_iterator_status status; |
| 1360 | |
| 1361 | if (!iterator) { |
| 1362 | status = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; |
| 1363 | goto end; |
| 1364 | } |
| 1365 | |
| 1366 | /* |
| 1367 | * Make sure that the iterator's queue contains at least one |
| 1368 | * notification. |
| 1369 | */ |
| 1370 | status = ensure_queue_has_notifications(iterator); |
| 1371 | if (status != BT_NOTIFICATION_ITERATOR_STATUS_OK) { |
| 1372 | goto end; |
| 1373 | } |
| 1374 | |
| 1375 | /* |
| 1376 | * Move the notification at the tail of the queue to the |
| 1377 | * iterator's current notification. |
| 1378 | */ |
| 1379 | assert(iterator->queue->length > 0); |
| 1380 | bt_put(iterator->current_notification); |
| 1381 | iterator->current_notification = g_queue_pop_tail(iterator->queue); |
| 1382 | assert(iterator->current_notification); |
| 1383 | |
| 1384 | end: |
| 1385 | return status; |
| 1386 | } |
| 1387 | |
| 1388 | struct bt_component *bt_notification_iterator_get_component( |
| 1389 | struct bt_notification_iterator *iterator) |
| 1390 | { |
| 1391 | return bt_get(iterator->upstream_component); |
| 1392 | } |
| 1393 | |
| 1394 | struct bt_private_component * |
| 1395 | bt_private_notification_iterator_get_private_component( |
| 1396 | struct bt_private_notification_iterator *private_iterator) |
| 1397 | { |
| 1398 | return bt_private_component_from_component( |
| 1399 | bt_notification_iterator_get_component( |
| 1400 | bt_notification_iterator_from_private(private_iterator))); |
| 1401 | } |
| 1402 | |
| 1403 | enum bt_notification_iterator_status bt_notification_iterator_seek_time( |
| 1404 | struct bt_notification_iterator *iterator, |
| 1405 | enum bt_notification_iterator_seek_origin seek_origin, |
| 1406 | int64_t time) |
| 1407 | { |
| 1408 | enum bt_notification_iterator_status ret = |
| 1409 | BT_NOTIFICATION_ITERATOR_STATUS_UNSUPPORTED; |
| 1410 | return ret; |
| 1411 | } |