| 1 | /* |
| 2 | * Copyright 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 3 | * Copyright 2017 Philippe Proulx <pproulx@efficios.com> |
| 4 | * |
| 5 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 6 | * of this software and associated documentation files (the "Software"), to deal |
| 7 | * in the Software without restriction, including without limitation the rights |
| 8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 9 | * copies of the Software, and to permit persons to whom the Software is |
| 10 | * furnished to do so, subject to the following conditions: |
| 11 | * |
| 12 | * The above copyright notice and this permission notice shall be included in |
| 13 | * all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 21 | * SOFTWARE. |
| 22 | */ |
| 23 | |
| 24 | #define BT_LOG_TAG "NOTIF-ITER" |
| 25 | #include <babeltrace/lib-logging-internal.h> |
| 26 | |
| 27 | #include <babeltrace/compiler-internal.h> |
| 28 | #include <babeltrace/object.h> |
| 29 | #include <babeltrace/trace-ir/fields.h> |
| 30 | #include <babeltrace/trace-ir/event-internal.h> |
| 31 | #include <babeltrace/trace-ir/packet-internal.h> |
| 32 | #include <babeltrace/trace-ir/stream-internal.h> |
| 33 | #include <babeltrace/graph/connection.h> |
| 34 | #include <babeltrace/graph/connection-internal.h> |
| 35 | #include <babeltrace/graph/component.h> |
| 36 | #include <babeltrace/graph/component-internal.h> |
| 37 | #include <babeltrace/graph/component-source-internal.h> |
| 38 | #include <babeltrace/graph/component-class-internal.h> |
| 39 | #include <babeltrace/graph/component-class-sink-colander-internal.h> |
| 40 | #include <babeltrace/graph/component-sink.h> |
| 41 | #include <babeltrace/graph/notification.h> |
| 42 | #include <babeltrace/graph/notification-iterator.h> |
| 43 | #include <babeltrace/graph/notification-iterator-internal.h> |
| 44 | #include <babeltrace/graph/self-component-port-input-notification-iterator.h> |
| 45 | #include <babeltrace/graph/port-output-notification-iterator.h> |
| 46 | #include <babeltrace/graph/notification-internal.h> |
| 47 | #include <babeltrace/graph/notification-event.h> |
| 48 | #include <babeltrace/graph/notification-event-internal.h> |
| 49 | #include <babeltrace/graph/notification-packet.h> |
| 50 | #include <babeltrace/graph/notification-packet-internal.h> |
| 51 | #include <babeltrace/graph/notification-stream.h> |
| 52 | #include <babeltrace/graph/notification-stream-internal.h> |
| 53 | #include <babeltrace/graph/port.h> |
| 54 | #include <babeltrace/graph/private-graph.h> |
| 55 | #include <babeltrace/graph/graph-internal.h> |
| 56 | #include <babeltrace/types.h> |
| 57 | #include <babeltrace/assert-internal.h> |
| 58 | #include <babeltrace/assert-pre-internal.h> |
| 59 | #include <stdint.h> |
| 60 | #include <inttypes.h> |
| 61 | #include <stdlib.h> |
| 62 | |
| 63 | /* |
| 64 | * TODO: Use graph's state (number of active iterators, etc.) and |
| 65 | * possibly system specifications to make a better guess than this. |
| 66 | */ |
| 67 | #define NOTIF_BATCH_SIZE 15 |
| 68 | |
| 69 | struct stream_state { |
| 70 | struct bt_stream *stream; /* owned by this */ |
| 71 | struct bt_packet *cur_packet; /* owned by this */ |
| 72 | uint64_t expected_notif_seq_num; |
| 73 | bt_bool is_ended; |
| 74 | }; |
| 75 | |
| 76 | BT_ASSERT_PRE_FUNC |
| 77 | static |
| 78 | void destroy_stream_state(struct stream_state *stream_state) |
| 79 | { |
| 80 | if (!stream_state) { |
| 81 | return; |
| 82 | } |
| 83 | |
| 84 | BT_LOGV("Destroying stream state: stream-state-addr=%p", stream_state); |
| 85 | BT_LOGV_STR("Putting stream state's current packet."); |
| 86 | BT_OBJECT_PUT_REF_AND_RESET(stream_state->cur_packet); |
| 87 | BT_LOGV_STR("Putting stream state's stream."); |
| 88 | BT_OBJECT_PUT_REF_AND_RESET(stream_state->stream); |
| 89 | g_free(stream_state); |
| 90 | } |
| 91 | |
| 92 | BT_ASSERT_PRE_FUNC |
| 93 | static |
| 94 | struct stream_state *create_stream_state(struct bt_stream *stream) |
| 95 | { |
| 96 | struct stream_state *stream_state = g_new0(struct stream_state, 1); |
| 97 | |
| 98 | if (!stream_state) { |
| 99 | BT_LOGE_STR("Failed to allocate one stream state."); |
| 100 | goto end; |
| 101 | } |
| 102 | |
| 103 | /* |
| 104 | * We keep a reference to the stream until we know it's ended. |
| 105 | */ |
| 106 | stream_state->stream = bt_object_get_ref(stream); |
| 107 | BT_LIB_LOGV("Created stream state: %![stream-]+s, " |
| 108 | "stream-state-addr=%p", |
| 109 | stream, stream_state); |
| 110 | |
| 111 | end: |
| 112 | return stream_state; |
| 113 | } |
| 114 | |
| 115 | static |
| 116 | void destroy_base_notification_iterator(struct bt_object *obj) |
| 117 | { |
| 118 | struct bt_notification_iterator *iterator = (void *) obj; |
| 119 | |
| 120 | BT_ASSERT(iterator); |
| 121 | |
| 122 | if (iterator->notifs) { |
| 123 | g_ptr_array_free(iterator->notifs, TRUE); |
| 124 | iterator->notifs = NULL; |
| 125 | } |
| 126 | |
| 127 | g_free(iterator); |
| 128 | } |
| 129 | |
| 130 | static |
| 131 | void bt_self_component_port_input_notification_iterator_destroy(struct bt_object *obj) |
| 132 | { |
| 133 | struct bt_self_component_port_input_notification_iterator *iterator; |
| 134 | |
| 135 | BT_ASSERT(obj); |
| 136 | |
| 137 | /* |
| 138 | * The notification iterator's reference count is 0 if we're |
| 139 | * here. Increment it to avoid a double-destroy (possibly |
| 140 | * infinitely recursive). This could happen for example if the |
| 141 | * notification iterator's finalization function does |
| 142 | * bt_object_get_ref() (or anything that causes |
| 143 | * bt_object_get_ref() to be called) on itself (ref. count goes |
| 144 | * from 0 to 1), and then bt_object_put_ref(): the reference |
| 145 | * count would go from 1 to 0 again and this function would be |
| 146 | * called again. |
| 147 | */ |
| 148 | obj->ref_count++; |
| 149 | iterator = (void *) obj; |
| 150 | BT_LIB_LOGD("Destroying self component input port notification iterator object: " |
| 151 | "%!+i", iterator); |
| 152 | bt_self_component_port_input_notification_iterator_finalize(iterator); |
| 153 | |
| 154 | if (iterator->stream_states) { |
| 155 | /* |
| 156 | * Remove our destroy listener from each stream which |
| 157 | * has a state in this iterator. Otherwise the destroy |
| 158 | * listener would be called with an invalid/other |
| 159 | * notification iterator object. |
| 160 | */ |
| 161 | g_hash_table_destroy(iterator->stream_states); |
| 162 | iterator->stream_states = NULL; |
| 163 | } |
| 164 | |
| 165 | if (iterator->connection) { |
| 166 | /* |
| 167 | * Remove ourself from the originating connection so |
| 168 | * that it does not try to finalize a dangling pointer |
| 169 | * later. |
| 170 | */ |
| 171 | bt_connection_remove_iterator(iterator->connection, iterator); |
| 172 | iterator->connection = NULL; |
| 173 | } |
| 174 | |
| 175 | destroy_base_notification_iterator(obj); |
| 176 | } |
| 177 | |
| 178 | BT_HIDDEN |
| 179 | void bt_self_component_port_input_notification_iterator_finalize( |
| 180 | struct bt_self_component_port_input_notification_iterator *iterator) |
| 181 | { |
| 182 | typedef void (*method_t)(void *); |
| 183 | |
| 184 | struct bt_component_class *comp_class = NULL; |
| 185 | method_t method = NULL; |
| 186 | |
| 187 | BT_ASSERT(iterator); |
| 188 | |
| 189 | switch (iterator->state) { |
| 190 | case BT_SELF_COMPONENT_PORT_INPUT_NOTIFICATION_ITERATOR_STATE_NON_INITIALIZED: |
| 191 | /* Skip user finalization if user initialization failed */ |
| 192 | BT_LIB_LOGD("Not finalizing non-initialized notification iterator: " |
| 193 | "%!+i", iterator); |
| 194 | return; |
| 195 | case BT_SELF_COMPONENT_PORT_INPUT_NOTIFICATION_ITERATOR_STATE_FINALIZED: |
| 196 | case BT_SELF_COMPONENT_PORT_INPUT_NOTIFICATION_ITERATOR_STATE_FINALIZED_AND_ENDED: |
| 197 | /* Already finalized */ |
| 198 | BT_LIB_LOGD("Not finalizing notification iterator: already finalized: " |
| 199 | "%!+i", iterator); |
| 200 | return; |
| 201 | default: |
| 202 | break; |
| 203 | } |
| 204 | |
| 205 | BT_LIB_LOGD("Finalizing notification iterator: %!+i", iterator); |
| 206 | |
| 207 | if (iterator->state == BT_SELF_COMPONENT_PORT_INPUT_NOTIFICATION_ITERATOR_STATE_ENDED) { |
| 208 | BT_LIB_LOGD("Updating notification iterator's state: " |
| 209 | "new-state=BT_SELF_COMPONENT_PORT_INPUT_NOTIFICATION_ITERATOR_STATE_FINALIZED_AND_ENDED"); |
| 210 | iterator->state = BT_SELF_COMPONENT_PORT_INPUT_NOTIFICATION_ITERATOR_STATE_FINALIZED_AND_ENDED; |
| 211 | } else { |
| 212 | BT_LIB_LOGD("Updating notification iterator's state: " |
| 213 | "new-state=BT_SELF_COMPONENT_PORT_INPUT_NOTIFICATION_ITERATOR_STATE_FINALIZED"); |
| 214 | iterator->state = BT_SELF_COMPONENT_PORT_INPUT_NOTIFICATION_ITERATOR_STATE_FINALIZED; |
| 215 | } |
| 216 | |
| 217 | BT_ASSERT(iterator->upstream_component); |
| 218 | comp_class = iterator->upstream_component->class; |
| 219 | |
| 220 | /* Call user-defined destroy method */ |
| 221 | switch (comp_class->type) { |
| 222 | case BT_COMPONENT_CLASS_TYPE_SOURCE: |
| 223 | { |
| 224 | struct bt_component_class_source *src_comp_cls = |
| 225 | (void *) comp_class; |
| 226 | |
| 227 | method = (method_t) src_comp_cls->methods.notif_iter_finalize; |
| 228 | break; |
| 229 | } |
| 230 | case BT_COMPONENT_CLASS_TYPE_FILTER: |
| 231 | { |
| 232 | struct bt_component_class_filter *flt_comp_cls = |
| 233 | (void *) comp_class; |
| 234 | |
| 235 | method = (method_t) flt_comp_cls->methods.notif_iter_finalize; |
| 236 | break; |
| 237 | } |
| 238 | default: |
| 239 | /* Unreachable */ |
| 240 | abort(); |
| 241 | } |
| 242 | |
| 243 | if (method) { |
| 244 | BT_LIB_LOGD("Calling user's finalization method: %!+i", |
| 245 | iterator); |
| 246 | method(iterator); |
| 247 | } |
| 248 | |
| 249 | iterator->upstream_component = NULL; |
| 250 | iterator->upstream_port = NULL; |
| 251 | BT_LIB_LOGD("Finalized notification iterator: %!+i", iterator); |
| 252 | } |
| 253 | |
| 254 | BT_HIDDEN |
| 255 | void bt_self_component_port_input_notification_iterator_set_connection( |
| 256 | struct bt_self_component_port_input_notification_iterator *iterator, |
| 257 | struct bt_connection *connection) |
| 258 | { |
| 259 | BT_ASSERT(iterator); |
| 260 | iterator->connection = connection; |
| 261 | BT_LIB_LOGV("Set notification iterator's connection: " |
| 262 | "%![iter-]+i, %![conn-]+x", iterator, connection); |
| 263 | } |
| 264 | |
| 265 | static |
| 266 | int init_notification_iterator(struct bt_notification_iterator *iterator, |
| 267 | enum bt_notification_iterator_type type, |
| 268 | bt_object_release_func destroy) |
| 269 | { |
| 270 | int ret = 0; |
| 271 | |
| 272 | bt_object_init_shared(&iterator->base, destroy); |
| 273 | iterator->type = type; |
| 274 | iterator->notifs = g_ptr_array_new(); |
| 275 | if (!iterator->notifs) { |
| 276 | BT_LOGE_STR("Failed to allocate a GPtrArray."); |
| 277 | ret = -1; |
| 278 | goto end; |
| 279 | } |
| 280 | |
| 281 | g_ptr_array_set_size(iterator->notifs, NOTIF_BATCH_SIZE); |
| 282 | |
| 283 | end: |
| 284 | return ret; |
| 285 | } |
| 286 | |
| 287 | static |
| 288 | struct bt_self_component_port_input_notification_iterator * |
| 289 | bt_self_component_port_input_notification_iterator_create_initial( |
| 290 | struct bt_component *upstream_comp, |
| 291 | struct bt_port *upstream_port) |
| 292 | { |
| 293 | int ret; |
| 294 | struct bt_self_component_port_input_notification_iterator *iterator = NULL; |
| 295 | |
| 296 | BT_ASSERT(upstream_comp); |
| 297 | BT_ASSERT(upstream_port); |
| 298 | BT_ASSERT(bt_port_is_connected(upstream_port)); |
| 299 | BT_LIB_LOGD("Creating initial notification iterator on self component input port: " |
| 300 | "%![up-comp-]+c, %![up-port-]+p", upstream_comp, upstream_port); |
| 301 | BT_ASSERT(bt_component_get_class_type(upstream_comp) == |
| 302 | BT_COMPONENT_CLASS_TYPE_SOURCE || |
| 303 | bt_component_get_class_type(upstream_comp) == |
| 304 | BT_COMPONENT_CLASS_TYPE_FILTER); |
| 305 | iterator = g_new0( |
| 306 | struct bt_self_component_port_input_notification_iterator, 1); |
| 307 | if (!iterator) { |
| 308 | BT_LOGE_STR("Failed to allocate one self component input port " |
| 309 | "notification iterator."); |
| 310 | goto end; |
| 311 | } |
| 312 | |
| 313 | ret = init_notification_iterator((void *) iterator, |
| 314 | BT_NOTIFICATION_ITERATOR_TYPE_SELF_COMPONENT_PORT_INPUT, |
| 315 | bt_self_component_port_input_notification_iterator_destroy); |
| 316 | if (ret) { |
| 317 | /* init_notification_iterator() logs errors */ |
| 318 | BT_OBJECT_PUT_REF_AND_RESET(iterator); |
| 319 | goto end; |
| 320 | } |
| 321 | |
| 322 | iterator->stream_states = g_hash_table_new_full(g_direct_hash, |
| 323 | g_direct_equal, NULL, (GDestroyNotify) destroy_stream_state); |
| 324 | if (!iterator->stream_states) { |
| 325 | BT_LOGE_STR("Failed to allocate a GHashTable."); |
| 326 | BT_OBJECT_PUT_REF_AND_RESET(iterator); |
| 327 | goto end; |
| 328 | } |
| 329 | |
| 330 | iterator->upstream_component = upstream_comp; |
| 331 | iterator->upstream_port = upstream_port; |
| 332 | iterator->connection = iterator->upstream_port->connection; |
| 333 | iterator->graph = bt_component_borrow_graph(upstream_comp); |
| 334 | iterator->state = BT_SELF_COMPONENT_PORT_INPUT_NOTIFICATION_ITERATOR_STATE_NON_INITIALIZED; |
| 335 | BT_LIB_LOGD("Created initial notification iterator on self component input port: " |
| 336 | "%![up-port-]+p, %![up-comp-]+c, %![iter-]+i", |
| 337 | upstream_port, upstream_comp, iterator); |
| 338 | |
| 339 | end: |
| 340 | return iterator; |
| 341 | } |
| 342 | |
| 343 | struct bt_self_component_port_input_notification_iterator * |
| 344 | bt_self_component_port_input_notification_iterator_create( |
| 345 | struct bt_self_component_port_input *self_port) |
| 346 | { |
| 347 | typedef enum bt_self_notification_iterator_status (*init_method_t)( |
| 348 | void *, void *, void *); |
| 349 | |
| 350 | init_method_t init_method = NULL; |
| 351 | struct bt_self_component_port_input_notification_iterator *iterator = |
| 352 | NULL; |
| 353 | struct bt_port *port = (void *) self_port; |
| 354 | struct bt_port *upstream_port; |
| 355 | struct bt_component *comp; |
| 356 | struct bt_component *upstream_comp; |
| 357 | struct bt_component_class *upstream_comp_cls; |
| 358 | |
| 359 | BT_ASSERT_PRE_NON_NULL(port, "Port"); |
| 360 | comp = bt_port_borrow_component(port); |
| 361 | BT_ASSERT_PRE(bt_port_is_connected(port), |
| 362 | "Port is not connected: %![port-]+p", port); |
| 363 | BT_ASSERT_PRE(comp, "Port is not part of a component: %![port-]+p", |
| 364 | port); |
| 365 | BT_ASSERT_PRE(!bt_component_graph_is_canceled(comp), |
| 366 | "Port's component's graph is canceled: " |
| 367 | "%![port-]+p, %![comp-]+c", port, comp); |
| 368 | BT_ASSERT(port->connection); |
| 369 | upstream_port = port->connection->upstream_port; |
| 370 | BT_ASSERT(upstream_port); |
| 371 | upstream_comp = bt_port_borrow_component(upstream_port); |
| 372 | BT_ASSERT(upstream_comp); |
| 373 | upstream_comp_cls = upstream_comp->class; |
| 374 | BT_ASSERT(upstream_comp->class->type == |
| 375 | BT_COMPONENT_CLASS_TYPE_SOURCE || |
| 376 | upstream_comp->class->type == |
| 377 | BT_COMPONENT_CLASS_TYPE_FILTER); |
| 378 | iterator = bt_self_component_port_input_notification_iterator_create_initial( |
| 379 | upstream_comp, upstream_port); |
| 380 | if (!iterator) { |
| 381 | BT_LOGW_STR("Cannot create self component input port " |
| 382 | "notification iterator."); |
| 383 | goto end; |
| 384 | } |
| 385 | |
| 386 | switch (upstream_comp_cls->type) { |
| 387 | case BT_COMPONENT_CLASS_TYPE_SOURCE: |
| 388 | { |
| 389 | struct bt_component_class_source *src_comp_cls = |
| 390 | (void *) upstream_comp_cls; |
| 391 | |
| 392 | init_method = |
| 393 | (init_method_t) src_comp_cls->methods.notif_iter_init; |
| 394 | break; |
| 395 | } |
| 396 | case BT_COMPONENT_CLASS_TYPE_FILTER: |
| 397 | { |
| 398 | struct bt_component_class_filter *flt_comp_cls = |
| 399 | (void *) upstream_comp_cls; |
| 400 | |
| 401 | init_method = |
| 402 | (init_method_t) flt_comp_cls->methods.notif_iter_init; |
| 403 | break; |
| 404 | } |
| 405 | default: |
| 406 | /* Unreachable */ |
| 407 | abort(); |
| 408 | } |
| 409 | |
| 410 | if (init_method) { |
| 411 | int iter_status; |
| 412 | |
| 413 | BT_LIB_LOGD("Calling user's initialization method: %!+i", iterator); |
| 414 | iter_status = init_method(iterator, upstream_comp, |
| 415 | upstream_port); |
| 416 | BT_LOGD("User method returned: status=%s", |
| 417 | bt_notification_iterator_status_string(iter_status)); |
| 418 | if (iter_status != BT_NOTIFICATION_ITERATOR_STATUS_OK) { |
| 419 | BT_LOGW_STR("Initialization method failed."); |
| 420 | goto end; |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | iterator->state = BT_SELF_COMPONENT_PORT_INPUT_NOTIFICATION_ITERATOR_STATE_ACTIVE; |
| 425 | g_ptr_array_add(port->connection->iterators, iterator); |
| 426 | BT_LIB_LOGD("Created notification iterator on self component input port: " |
| 427 | "%![up-port-]+p, %![up-comp-]+c, %![iter-]+i", |
| 428 | upstream_port, upstream_comp, iterator); |
| 429 | |
| 430 | end: |
| 431 | return iterator; |
| 432 | } |
| 433 | |
| 434 | void *bt_self_notification_iterator_get_data( |
| 435 | struct bt_self_notification_iterator *self_iterator) |
| 436 | { |
| 437 | struct bt_self_component_port_input_notification_iterator *iterator = |
| 438 | (void *) self_iterator; |
| 439 | |
| 440 | BT_ASSERT_PRE_NON_NULL(iterator, "Notification iterator"); |
| 441 | return iterator->user_data; |
| 442 | } |
| 443 | |
| 444 | void bt_self_notification_iterator_set_data( |
| 445 | struct bt_self_notification_iterator *self_iterator, void *data) |
| 446 | { |
| 447 | struct bt_self_component_port_input_notification_iterator *iterator = |
| 448 | (void *) self_iterator; |
| 449 | |
| 450 | BT_ASSERT_PRE_NON_NULL(iterator, "Notification iterator"); |
| 451 | iterator->user_data = data; |
| 452 | BT_LIB_LOGV("Set notification iterator's user data: " |
| 453 | "%!+i, user-data-addr=%p", iterator, data); |
| 454 | } |
| 455 | |
| 456 | BT_ASSERT_PRE_FUNC |
| 457 | static inline |
| 458 | void bt_notification_borrow_packet_stream(struct bt_notification *notif, |
| 459 | struct bt_stream **stream, struct bt_packet **packet) |
| 460 | { |
| 461 | BT_ASSERT(notif); |
| 462 | |
| 463 | switch (notif->type) { |
| 464 | case BT_NOTIFICATION_TYPE_EVENT: |
| 465 | *packet = bt_event_borrow_packet( |
| 466 | bt_notification_event_borrow_event(notif)); |
| 467 | *stream = bt_packet_borrow_stream(*packet); |
| 468 | break; |
| 469 | case BT_NOTIFICATION_TYPE_STREAM_BEGIN: |
| 470 | *stream = bt_notification_stream_begin_borrow_stream(notif); |
| 471 | break; |
| 472 | case BT_NOTIFICATION_TYPE_STREAM_END: |
| 473 | *stream = bt_notification_stream_end_borrow_stream(notif); |
| 474 | break; |
| 475 | case BT_NOTIFICATION_TYPE_PACKET_BEGIN: |
| 476 | *packet = bt_notification_packet_begin_borrow_packet(notif); |
| 477 | *stream = bt_packet_borrow_stream(*packet); |
| 478 | break; |
| 479 | case BT_NOTIFICATION_TYPE_PACKET_END: |
| 480 | *packet = bt_notification_packet_end_borrow_packet(notif); |
| 481 | *stream = bt_packet_borrow_stream(*packet); |
| 482 | break; |
| 483 | default: |
| 484 | break; |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | BT_ASSERT_PRE_FUNC |
| 489 | static inline |
| 490 | bool validate_notification( |
| 491 | struct bt_self_component_port_input_notification_iterator *iterator, |
| 492 | struct bt_notification *notif) |
| 493 | { |
| 494 | bool is_valid = true; |
| 495 | struct stream_state *stream_state; |
| 496 | struct bt_stream *stream = NULL; |
| 497 | struct bt_packet *packet = NULL; |
| 498 | |
| 499 | BT_ASSERT(notif); |
| 500 | bt_notification_borrow_packet_stream(notif, &stream, &packet); |
| 501 | |
| 502 | if (!stream) { |
| 503 | /* we don't care about notifications not attached to streams */ |
| 504 | goto end; |
| 505 | } |
| 506 | |
| 507 | stream_state = g_hash_table_lookup(iterator->stream_states, stream); |
| 508 | if (!stream_state) { |
| 509 | /* |
| 510 | * No stream state for this stream: this notification |
| 511 | * MUST be a BT_NOTIFICATION_TYPE_STREAM_BEGIN notification |
| 512 | * and its sequence number must be 0. |
| 513 | */ |
| 514 | if (notif->type != BT_NOTIFICATION_TYPE_STREAM_BEGIN) { |
| 515 | BT_ASSERT_PRE_MSG("Unexpected notification: missing a " |
| 516 | "BT_NOTIFICATION_TYPE_STREAM_BEGIN " |
| 517 | "notification prior to this notification: " |
| 518 | "%![stream-]+s", stream); |
| 519 | is_valid = false; |
| 520 | goto end; |
| 521 | } |
| 522 | |
| 523 | if (notif->seq_num == -1ULL) { |
| 524 | notif->seq_num = 0; |
| 525 | } |
| 526 | |
| 527 | if (notif->seq_num != 0) { |
| 528 | BT_ASSERT_PRE_MSG("Unexpected notification sequence " |
| 529 | "number for this notification iterator: " |
| 530 | "this is the first notification for this " |
| 531 | "stream, expecting sequence number 0: " |
| 532 | "seq-num=%" PRIu64 ", %![stream-]+s", |
| 533 | notif->seq_num, stream); |
| 534 | is_valid = false; |
| 535 | goto end; |
| 536 | } |
| 537 | |
| 538 | stream_state = create_stream_state(stream); |
| 539 | if (!stream_state) { |
| 540 | abort(); |
| 541 | } |
| 542 | |
| 543 | g_hash_table_insert(iterator->stream_states, stream, |
| 544 | stream_state); |
| 545 | stream_state->expected_notif_seq_num++; |
| 546 | goto end; |
| 547 | } |
| 548 | |
| 549 | if (stream_state->is_ended) { |
| 550 | /* |
| 551 | * There's a new notification which has a reference to a |
| 552 | * stream which, from this iterator's point of view, is |
| 553 | * ended ("end of stream" notification was returned). |
| 554 | * This is bad: the API guarantees that it can never |
| 555 | * happen. |
| 556 | */ |
| 557 | BT_ASSERT_PRE_MSG("Stream is already ended: %![stream-]+s", |
| 558 | stream); |
| 559 | is_valid = false; |
| 560 | goto end; |
| 561 | } |
| 562 | |
| 563 | if (notif->seq_num == -1ULL) { |
| 564 | notif->seq_num = stream_state->expected_notif_seq_num; |
| 565 | } |
| 566 | |
| 567 | if (notif->seq_num != -1ULL && |
| 568 | notif->seq_num != stream_state->expected_notif_seq_num) { |
| 569 | BT_ASSERT_PRE_MSG("Unexpected notification sequence number: " |
| 570 | "seq-num=%" PRIu64 ", " |
| 571 | "expected-seq-num=%" PRIu64 ", %![stream-]+s", |
| 572 | notif->seq_num, stream_state->expected_notif_seq_num, |
| 573 | stream); |
| 574 | is_valid = false; |
| 575 | goto end; |
| 576 | } |
| 577 | |
| 578 | switch (notif->type) { |
| 579 | case BT_NOTIFICATION_TYPE_STREAM_BEGIN: |
| 580 | BT_ASSERT_PRE_MSG("Unexpected BT_NOTIFICATION_TYPE_STREAM_BEGIN " |
| 581 | "notification at this point: notif-seq-num=%" PRIu64 ", " |
| 582 | "%![stream-]+s", notif->seq_num, stream); |
| 583 | is_valid = false; |
| 584 | goto end; |
| 585 | case BT_NOTIFICATION_TYPE_STREAM_END: |
| 586 | if (stream_state->cur_packet) { |
| 587 | BT_ASSERT_PRE_MSG("Unexpected BT_NOTIFICATION_TYPE_STREAM_END " |
| 588 | "notification: missing a " |
| 589 | "BT_NOTIFICATION_TYPE_PACKET_END notification " |
| 590 | "prior to this notification: " |
| 591 | "notif-seq-num=%" PRIu64 ", " |
| 592 | "%![stream-]+s", notif->seq_num, stream); |
| 593 | is_valid = false; |
| 594 | goto end; |
| 595 | } |
| 596 | stream_state->expected_notif_seq_num++; |
| 597 | stream_state->is_ended = true; |
| 598 | goto end; |
| 599 | case BT_NOTIFICATION_TYPE_PACKET_BEGIN: |
| 600 | if (stream_state->cur_packet) { |
| 601 | BT_ASSERT_PRE_MSG("Unexpected BT_NOTIFICATION_TYPE_PACKET_BEGIN " |
| 602 | "notification at this point: missing a " |
| 603 | "BT_NOTIFICATION_TYPE_PACKET_END notification " |
| 604 | "prior to this notification: " |
| 605 | "notif-seq-num=%" PRIu64 ", %![stream-]+s, " |
| 606 | "%![packet-]+a", notif->seq_num, stream, |
| 607 | packet); |
| 608 | is_valid = false; |
| 609 | goto end; |
| 610 | } |
| 611 | stream_state->expected_notif_seq_num++; |
| 612 | stream_state->cur_packet = bt_object_get_ref(packet); |
| 613 | goto end; |
| 614 | case BT_NOTIFICATION_TYPE_PACKET_END: |
| 615 | if (!stream_state->cur_packet) { |
| 616 | BT_ASSERT_PRE_MSG("Unexpected BT_NOTIFICATION_TYPE_PACKET_END " |
| 617 | "notification at this point: missing a " |
| 618 | "BT_NOTIFICATION_TYPE_PACKET_BEGIN notification " |
| 619 | "prior to this notification: " |
| 620 | "notif-seq-num=%" PRIu64 ", %![stream-]+s, " |
| 621 | "%![packet-]+a", notif->seq_num, stream, |
| 622 | packet); |
| 623 | is_valid = false; |
| 624 | goto end; |
| 625 | } |
| 626 | stream_state->expected_notif_seq_num++; |
| 627 | BT_OBJECT_PUT_REF_AND_RESET(stream_state->cur_packet); |
| 628 | goto end; |
| 629 | case BT_NOTIFICATION_TYPE_EVENT: |
| 630 | if (packet != stream_state->cur_packet) { |
| 631 | BT_ASSERT_PRE_MSG("Unexpected packet for " |
| 632 | "BT_NOTIFICATION_TYPE_EVENT notification: " |
| 633 | "notif-seq-num=%" PRIu64 ", %![stream-]+s, " |
| 634 | "%![notif-packet-]+a, %![expected-packet-]+a", |
| 635 | notif->seq_num, stream, |
| 636 | stream_state->cur_packet, packet); |
| 637 | is_valid = false; |
| 638 | goto end; |
| 639 | } |
| 640 | stream_state->expected_notif_seq_num++; |
| 641 | goto end; |
| 642 | default: |
| 643 | break; |
| 644 | } |
| 645 | |
| 646 | end: |
| 647 | return is_valid; |
| 648 | } |
| 649 | |
| 650 | BT_ASSERT_PRE_FUNC |
| 651 | static inline |
| 652 | bool validate_notifications( |
| 653 | struct bt_self_component_port_input_notification_iterator *iterator, |
| 654 | uint64_t count) |
| 655 | { |
| 656 | bool ret = true; |
| 657 | bt_notification_array notifs = (void *) iterator->base.notifs->pdata; |
| 658 | uint64_t i; |
| 659 | |
| 660 | for (i = 0; i < count; i++) { |
| 661 | ret = validate_notification(iterator, notifs[i]); |
| 662 | if (!ret) { |
| 663 | break; |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | return ret; |
| 668 | } |
| 669 | |
| 670 | BT_ASSERT_PRE_FUNC |
| 671 | static inline bool priv_conn_notif_iter_can_end( |
| 672 | struct bt_self_component_port_input_notification_iterator *iterator) |
| 673 | { |
| 674 | GHashTableIter iter; |
| 675 | gpointer stream_key, state_value; |
| 676 | bool ret = true; |
| 677 | |
| 678 | /* |
| 679 | * Verify that this iterator received a |
| 680 | * BT_NOTIFICATION_TYPE_STREAM_END notification for each stream |
| 681 | * which has a state. |
| 682 | */ |
| 683 | |
| 684 | g_hash_table_iter_init(&iter, iterator->stream_states); |
| 685 | |
| 686 | while (g_hash_table_iter_next(&iter, &stream_key, &state_value)) { |
| 687 | struct stream_state *stream_state = (void *) state_value; |
| 688 | |
| 689 | BT_ASSERT(stream_state); |
| 690 | BT_ASSERT(stream_key); |
| 691 | |
| 692 | if (!stream_state->is_ended) { |
| 693 | BT_ASSERT_PRE_MSG("Ending notification iterator, " |
| 694 | "but stream is not ended: " |
| 695 | "%![stream-]s", stream_key); |
| 696 | ret = false; |
| 697 | goto end; |
| 698 | } |
| 699 | } |
| 700 | |
| 701 | end: |
| 702 | return ret; |
| 703 | } |
| 704 | |
| 705 | enum bt_notification_iterator_status |
| 706 | bt_self_component_port_input_notification_iterator_next( |
| 707 | struct bt_self_component_port_input_notification_iterator *iterator, |
| 708 | bt_notification_array *notifs, uint64_t *user_count) |
| 709 | { |
| 710 | typedef enum bt_self_notification_iterator_status (*method_t)( |
| 711 | void *, bt_notification_array, uint64_t, uint64_t *); |
| 712 | |
| 713 | method_t method = NULL; |
| 714 | struct bt_component_class *comp_cls; |
| 715 | int status = BT_NOTIFICATION_ITERATOR_STATUS_OK; |
| 716 | |
| 717 | BT_ASSERT_PRE_NON_NULL(iterator, "Notification iterator"); |
| 718 | BT_ASSERT_PRE_NON_NULL(notifs, "Notification array (output)"); |
| 719 | BT_ASSERT_PRE_NON_NULL(user_count, "Notification count (output)"); |
| 720 | BT_ASSERT_PRE(iterator->state == |
| 721 | BT_SELF_COMPONENT_PORT_INPUT_NOTIFICATION_ITERATOR_STATE_ACTIVE, |
| 722 | "Notification iterator's \"next\" called, but " |
| 723 | "iterator is in the wrong state: %!+i", iterator); |
| 724 | BT_ASSERT(iterator->upstream_component); |
| 725 | BT_ASSERT(iterator->upstream_component->class); |
| 726 | BT_LIB_LOGD("Getting next self component input port " |
| 727 | "notification iterator's notifications: %!+i", iterator); |
| 728 | comp_cls = iterator->upstream_component->class; |
| 729 | |
| 730 | /* Pick the appropriate "next" method */ |
| 731 | switch (comp_cls->type) { |
| 732 | case BT_COMPONENT_CLASS_TYPE_SOURCE: |
| 733 | { |
| 734 | struct bt_component_class_source *src_comp_cls = |
| 735 | (void *) comp_cls; |
| 736 | |
| 737 | method = (method_t) src_comp_cls->methods.notif_iter_next; |
| 738 | break; |
| 739 | } |
| 740 | case BT_COMPONENT_CLASS_TYPE_FILTER: |
| 741 | { |
| 742 | struct bt_component_class_filter *flt_comp_cls = |
| 743 | (void *) comp_cls; |
| 744 | |
| 745 | method = (method_t) flt_comp_cls->methods.notif_iter_next; |
| 746 | break; |
| 747 | } |
| 748 | default: |
| 749 | abort(); |
| 750 | } |
| 751 | |
| 752 | /* |
| 753 | * Call the user's "next" method to get the next notifications |
| 754 | * and status. |
| 755 | */ |
| 756 | BT_ASSERT(method); |
| 757 | BT_LOGD_STR("Calling user's \"next\" method."); |
| 758 | status = method(iterator, |
| 759 | (void *) iterator->base.notifs->pdata, |
| 760 | NOTIF_BATCH_SIZE, user_count); |
| 761 | BT_LOGD("User method returned: status=%s", |
| 762 | bt_notification_iterator_status_string(status)); |
| 763 | if (status < 0) { |
| 764 | BT_LOGW_STR("User method failed."); |
| 765 | goto end; |
| 766 | } |
| 767 | |
| 768 | if (iterator->state == BT_SELF_COMPONENT_PORT_INPUT_NOTIFICATION_ITERATOR_STATE_FINALIZED || |
| 769 | iterator->state == BT_SELF_COMPONENT_PORT_INPUT_NOTIFICATION_ITERATOR_STATE_FINALIZED_AND_ENDED) { |
| 770 | /* |
| 771 | * The user's "next" method, somehow, cancelled its own |
| 772 | * notification iterator. This can happen, for example, |
| 773 | * when the user's method removes the port on which |
| 774 | * there's the connection from which the iterator was |
| 775 | * created. In this case, said connection is ended, and |
| 776 | * all its notification iterators are finalized. |
| 777 | * |
| 778 | * Only bt_object_put_ref() the returned notification if |
| 779 | * the status is BT_NOTIFICATION_ITERATOR_STATUS_OK |
| 780 | * because otherwise this field could be garbage. |
| 781 | */ |
| 782 | if (status == BT_NOTIFICATION_ITERATOR_STATUS_OK) { |
| 783 | uint64_t i; |
| 784 | bt_notification_array notifs = |
| 785 | (void *) iterator->base.notifs->pdata; |
| 786 | |
| 787 | for (i = 0; i < *user_count; i++) { |
| 788 | bt_object_put_ref(notifs[i]); |
| 789 | } |
| 790 | } |
| 791 | |
| 792 | status = BT_NOTIFICATION_ITERATOR_STATUS_CANCELED; |
| 793 | goto end; |
| 794 | } |
| 795 | |
| 796 | switch (status) { |
| 797 | case BT_NOTIFICATION_ITERATOR_STATUS_OK: |
| 798 | BT_ASSERT_PRE(validate_notifications(iterator, *user_count), |
| 799 | "Notifications are invalid at this point: " |
| 800 | "%![notif-iter-]+i, count=%" PRIu64, |
| 801 | iterator, *user_count); |
| 802 | *notifs = (void *) iterator->base.notifs->pdata; |
| 803 | break; |
| 804 | case BT_NOTIFICATION_ITERATOR_STATUS_AGAIN: |
| 805 | goto end; |
| 806 | case BT_NOTIFICATION_ITERATOR_STATUS_END: |
| 807 | BT_ASSERT_PRE(priv_conn_notif_iter_can_end(iterator), |
| 808 | "Notification iterator cannot end at this point: " |
| 809 | "%!+i", iterator); |
| 810 | BT_ASSERT(iterator->state == |
| 811 | BT_SELF_COMPONENT_PORT_INPUT_NOTIFICATION_ITERATOR_STATE_ACTIVE); |
| 812 | iterator->state = BT_SELF_COMPONENT_PORT_INPUT_NOTIFICATION_ITERATOR_STATE_ENDED; |
| 813 | BT_LOGD("Set new status: status=%s", |
| 814 | bt_notification_iterator_status_string(status)); |
| 815 | goto end; |
| 816 | default: |
| 817 | /* Unknown non-error status */ |
| 818 | abort(); |
| 819 | } |
| 820 | |
| 821 | end: |
| 822 | return status; |
| 823 | } |
| 824 | |
| 825 | enum bt_notification_iterator_status |
| 826 | bt_port_output_notification_iterator_next( |
| 827 | struct bt_port_output_notification_iterator *iterator, |
| 828 | bt_notification_array *notifs_to_user, |
| 829 | uint64_t *count_to_user) |
| 830 | { |
| 831 | enum bt_notification_iterator_status status; |
| 832 | enum bt_graph_status graph_status; |
| 833 | |
| 834 | BT_ASSERT_PRE_NON_NULL(iterator, "Notification iterator"); |
| 835 | BT_ASSERT_PRE_NON_NULL(notifs_to_user, "Notification array (output)"); |
| 836 | BT_ASSERT_PRE_NON_NULL(count_to_user, "Notification count (output)"); |
| 837 | BT_LIB_LOGD("Getting next output port notification iterator's notifications: " |
| 838 | "%!+i", iterator); |
| 839 | |
| 840 | graph_status = bt_graph_consume_sink_no_check(iterator->graph, |
| 841 | iterator->colander); |
| 842 | switch (graph_status) { |
| 843 | case BT_GRAPH_STATUS_CANCELED: |
| 844 | case BT_GRAPH_STATUS_AGAIN: |
| 845 | case BT_GRAPH_STATUS_END: |
| 846 | case BT_GRAPH_STATUS_NOMEM: |
| 847 | status = (int) graph_status; |
| 848 | break; |
| 849 | case BT_GRAPH_STATUS_OK: |
| 850 | status = BT_NOTIFICATION_ITERATOR_STATUS_OK; |
| 851 | |
| 852 | /* |
| 853 | * On success, the colander sink moves the notifications |
| 854 | * to this iterator's array and sets this iterator's |
| 855 | * notification count: move them to the user. |
| 856 | */ |
| 857 | *notifs_to_user = (void *) iterator->base.notifs->pdata; |
| 858 | *count_to_user = iterator->count; |
| 859 | break; |
| 860 | default: |
| 861 | /* Other errors */ |
| 862 | status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; |
| 863 | } |
| 864 | |
| 865 | return status; |
| 866 | } |
| 867 | |
| 868 | struct bt_component *bt_self_component_port_input_notification_iterator_borrow_component( |
| 869 | struct bt_self_component_port_input_notification_iterator *iterator) |
| 870 | { |
| 871 | BT_ASSERT_PRE_NON_NULL(iterator, "Notification iterator"); |
| 872 | return iterator->upstream_component; |
| 873 | } |
| 874 | |
| 875 | struct bt_self_component *bt_self_notification_iterator_borrow_component( |
| 876 | struct bt_self_notification_iterator *self_iterator) |
| 877 | { |
| 878 | struct bt_self_component_port_input_notification_iterator *iterator = |
| 879 | (void *) self_iterator; |
| 880 | |
| 881 | BT_ASSERT_PRE_NON_NULL(iterator, "Notification iterator"); |
| 882 | return (void *) iterator->upstream_component; |
| 883 | } |
| 884 | |
| 885 | struct bt_self_port_output *bt_self_notification_iterator_borrow_port( |
| 886 | struct bt_self_notification_iterator *self_iterator) |
| 887 | { |
| 888 | struct bt_self_component_port_input_notification_iterator *iterator = |
| 889 | (void *) self_iterator; |
| 890 | |
| 891 | BT_ASSERT_PRE_NON_NULL(iterator, "Notification iterator"); |
| 892 | return (void *) iterator->upstream_port; |
| 893 | } |
| 894 | |
| 895 | static |
| 896 | void bt_port_output_notification_iterator_destroy(struct bt_object *obj) |
| 897 | { |
| 898 | struct bt_port_output_notification_iterator *iterator = (void *) obj; |
| 899 | |
| 900 | BT_LIB_LOGD("Destroying output port notification iterator object: %!+i", |
| 901 | iterator); |
| 902 | BT_LOGD_STR("Putting graph."); |
| 903 | BT_OBJECT_PUT_REF_AND_RESET(iterator->graph); |
| 904 | BT_LOGD_STR("Putting colander sink component."); |
| 905 | BT_OBJECT_PUT_REF_AND_RESET(iterator->colander); |
| 906 | destroy_base_notification_iterator(obj); |
| 907 | } |
| 908 | |
| 909 | struct bt_port_output_notification_iterator * |
| 910 | bt_port_output_notification_iterator_create( |
| 911 | struct bt_private_graph *priv_graph, |
| 912 | struct bt_port_output *output_port) |
| 913 | { |
| 914 | struct bt_port_output_notification_iterator *iterator = NULL; |
| 915 | struct bt_component_class_sink *colander_comp_cls = NULL; |
| 916 | struct bt_component *output_port_comp = NULL; |
| 917 | struct bt_component_sink *colander_comp; |
| 918 | struct bt_graph *graph = (void *) priv_graph; |
| 919 | enum bt_graph_status graph_status; |
| 920 | struct bt_port_input *colander_in_port = NULL; |
| 921 | struct bt_component_class_sink_colander_data colander_data; |
| 922 | int ret; |
| 923 | |
| 924 | BT_ASSERT_PRE_NON_NULL(graph, "Graph"); |
| 925 | BT_ASSERT_PRE_NON_NULL(output_port, "Output port"); |
| 926 | output_port_comp = bt_port_borrow_component((void *) output_port); |
| 927 | BT_ASSERT_PRE(output_port_comp, |
| 928 | "Output port has no component: %!+p", output_port); |
| 929 | BT_ASSERT_PRE(bt_component_borrow_graph(output_port_comp) == |
| 930 | (void *) graph, |
| 931 | "Output port is not part of graph: %![graph-]+g, %![port-]+p", |
| 932 | graph, output_port); |
| 933 | |
| 934 | /* Create notification iterator */ |
| 935 | BT_LIB_LOGD("Creating notification iterator on output port: " |
| 936 | "%![port-]+p, %![comp-]+c", output_port, output_port_comp); |
| 937 | iterator = g_new0(struct bt_port_output_notification_iterator, 1); |
| 938 | if (!iterator) { |
| 939 | BT_LOGE_STR("Failed to allocate one output port notification iterator."); |
| 940 | goto error; |
| 941 | } |
| 942 | |
| 943 | ret = init_notification_iterator((void *) iterator, |
| 944 | BT_NOTIFICATION_ITERATOR_TYPE_PORT_OUTPUT, |
| 945 | bt_port_output_notification_iterator_destroy); |
| 946 | if (ret) { |
| 947 | /* init_notification_iterator() logs errors */ |
| 948 | BT_OBJECT_PUT_REF_AND_RESET(iterator); |
| 949 | goto end; |
| 950 | } |
| 951 | |
| 952 | /* Create colander component */ |
| 953 | colander_comp_cls = bt_component_class_sink_colander_get(); |
| 954 | if (!colander_comp_cls) { |
| 955 | BT_LOGW("Cannot get colander sink component class."); |
| 956 | goto error; |
| 957 | } |
| 958 | |
| 959 | iterator->graph = bt_object_get_ref(graph); |
| 960 | colander_data.notifs = (void *) iterator->base.notifs->pdata; |
| 961 | colander_data.count_addr = &iterator->count; |
| 962 | |
| 963 | /* Hope that nobody uses this very unique name */ |
| 964 | graph_status = |
| 965 | bt_private_graph_add_sink_component_with_init_method_data( |
| 966 | (void *) graph, colander_comp_cls, |
| 967 | "colander-36ac3409-b1a8-4d60-ab1f-4fdf341a8fb1", |
| 968 | NULL, &colander_data, &iterator->colander); |
| 969 | if (graph_status != BT_GRAPH_STATUS_OK) { |
| 970 | BT_LIB_LOGW("Cannot add colander sink component to graph: " |
| 971 | "%1[graph-]+g, status=%s", graph, |
| 972 | bt_graph_status_string(graph_status)); |
| 973 | goto error; |
| 974 | } |
| 975 | |
| 976 | /* |
| 977 | * Connect provided output port to the colander component's |
| 978 | * input port. |
| 979 | */ |
| 980 | colander_in_port = bt_component_sink_borrow_input_port_by_index( |
| 981 | iterator->colander, 0); |
| 982 | BT_ASSERT(colander_in_port); |
| 983 | graph_status = bt_private_graph_connect_ports(priv_graph, |
| 984 | output_port, colander_in_port, NULL); |
| 985 | if (graph_status != BT_GRAPH_STATUS_OK) { |
| 986 | BT_LIB_LOGW("Cannot add colander sink component to graph: " |
| 987 | "%![graph-]+g, %![comp-]+c, status=%s", graph, |
| 988 | iterator->colander, |
| 989 | bt_graph_status_string(graph_status)); |
| 990 | goto error; |
| 991 | } |
| 992 | |
| 993 | /* |
| 994 | * At this point everything went fine. Make the graph |
| 995 | * nonconsumable forever so that only this notification iterator |
| 996 | * can consume (thanks to bt_graph_consume_sink_no_check()). |
| 997 | * This avoids leaking the notification created by the colander |
| 998 | * sink and moved to the notification iterator's notification |
| 999 | * member. |
| 1000 | */ |
| 1001 | bt_graph_set_can_consume(iterator->graph, false); |
| 1002 | goto end; |
| 1003 | |
| 1004 | error: |
| 1005 | if (iterator && iterator->graph && iterator->colander) { |
| 1006 | int ret; |
| 1007 | |
| 1008 | /* Remove created colander component from graph if any */ |
| 1009 | colander_comp = iterator->colander; |
| 1010 | BT_OBJECT_PUT_REF_AND_RESET(iterator->colander); |
| 1011 | |
| 1012 | /* |
| 1013 | * At this point the colander component's reference |
| 1014 | * count is 0 because iterator->colander was the only |
| 1015 | * owner. We also know that it is not connected because |
| 1016 | * this is the last operation before this function |
| 1017 | * succeeds. |
| 1018 | * |
| 1019 | * Since we honor the preconditions here, |
| 1020 | * bt_graph_remove_unconnected_component() always |
| 1021 | * succeeds. |
| 1022 | */ |
| 1023 | ret = bt_graph_remove_unconnected_component(iterator->graph, |
| 1024 | (void *) colander_comp); |
| 1025 | BT_ASSERT(ret == 0); |
| 1026 | } |
| 1027 | |
| 1028 | BT_OBJECT_PUT_REF_AND_RESET(iterator); |
| 1029 | |
| 1030 | end: |
| 1031 | bt_object_put_ref(colander_comp_cls); |
| 1032 | return (void *) iterator; |
| 1033 | } |