goto end;
}
+ iterator->last_ns_from_origin = INT64_MIN;
+
iterator->auto_seek.msgs = g_queue_new();
if (!iterator->auto_seek.msgs) {
BT_LOGE_STR("Failed to allocate a GQueue.");
"%!+i, user-data-addr=%p", iterator, data);
}
+/*
+ * Validate that the default clock snapshot in `msg` doesn't make us go back in
+ * time.
+ */
+
+BT_ASSERT_PRE_FUNC
+static
+bool clock_snapshots_are_monotonic_one(
+ struct bt_self_component_port_input_message_iterator *iterator,
+ const bt_message *msg)
+{
+ const struct bt_clock_snapshot *clock_snapshot = NULL;
+ bt_message_type message_type = bt_message_get_type(msg);
+ int64_t ns_from_origin;
+ enum bt_clock_snapshot_status clock_snapshot_status;
+
+ /*
+ * The default is true: if we can't figure out the clock snapshot
+ * (or there is none), assume it is fine.
+ */
+ bool result = true;
+
+ switch (message_type) {
+ case BT_MESSAGE_TYPE_EVENT:
+ {
+ struct bt_message_event *event_msg = (struct bt_message_event *) msg;
+ clock_snapshot = event_msg->default_cs;
+ break;
+ }
+ case BT_MESSAGE_TYPE_MESSAGE_ITERATOR_INACTIVITY:
+ {
+ struct bt_message_message_iterator_inactivity *inactivity_msg =
+ (struct bt_message_message_iterator_inactivity *) msg;
+ clock_snapshot = inactivity_msg->default_cs;
+ break;
+ }
+ case BT_MESSAGE_TYPE_PACKET_BEGINNING:
+ case BT_MESSAGE_TYPE_PACKET_END:
+ {
+ struct bt_message_packet *packet_msg = (struct bt_message_packet *) msg;
+ clock_snapshot = packet_msg->default_cs;
+ break;
+ }
+ case BT_MESSAGE_TYPE_STREAM_ACTIVITY_BEGINNING:
+ case BT_MESSAGE_TYPE_STREAM_ACTIVITY_END:
+ {
+ struct bt_message_stream_activity *str_act_msg =
+ (struct bt_message_stream_activity *) msg;
+
+ if (str_act_msg->default_cs_state == BT_MESSAGE_STREAM_ACTIVITY_CLOCK_SNAPSHOT_STATE_KNOWN) {
+ clock_snapshot = str_act_msg->default_cs;
+ }
+ break;
+ }
+ case BT_MESSAGE_TYPE_STREAM_BEGINNING:
+ case BT_MESSAGE_TYPE_STREAM_END:
+ /* These messages don't have clock snapshots. */
+ goto end;
+ case BT_MESSAGE_TYPE_DISCARDED_EVENTS:
+ case BT_MESSAGE_TYPE_DISCARDED_PACKETS:
+ {
+ struct bt_message_discarded_items *discarded_msg =
+ (struct bt_message_discarded_items *) msg;
+
+ clock_snapshot = discarded_msg->default_begin_cs;
+ break;
+ }
+ }
+
+ if (!clock_snapshot) {
+ goto end;
+ }
+
+ clock_snapshot_status = bt_clock_snapshot_get_ns_from_origin(clock_snapshot, &ns_from_origin);
+ if (clock_snapshot_status != BT_CLOCK_SNAPSHOT_STATUS_OK) {
+ goto end;
+ }
+
+ result = ns_from_origin >= iterator->last_ns_from_origin;
+ iterator->last_ns_from_origin = ns_from_origin;
+end:
+ return result;
+}
+
+BT_ASSERT_PRE_FUNC
+static
+bool clock_snapshots_are_monotonic(
+ struct bt_self_component_port_input_message_iterator *iterator,
+ bt_message_array_const msgs, uint64_t msg_count)
+{
+ uint64_t i;
+ bool result;
+
+ for (i = 0; i < msg_count; i++) {
+ if (!clock_snapshots_are_monotonic_one(iterator, msgs[i])) {
+ result = false;
+ goto end;
+ }
+ }
+
+ result = true;
+
+end:
+ return result;
+}
+
+/*
+ * When a new stream begins, verify that the clock class tied to this
+ * stream is compatible with what we've seen before.
+ */
+
+BT_ASSERT_PRE_FUNC
+static
+bool clock_classes_are_compatible_one(struct bt_self_component_port_input_message_iterator *iterator,
+ const struct bt_message *msg)
+{
+ enum bt_message_type message_type = bt_message_get_type(msg);
+ bool result;
+
+ if (message_type == BT_MESSAGE_TYPE_STREAM_BEGINNING) {
+ const struct bt_message_stream *stream_msg = (struct bt_message_stream *) msg;
+ const struct bt_clock_class *clock_class = stream_msg->stream->class->default_clock_class;
+ bt_uuid clock_class_uuid = NULL;
+
+ if (clock_class) {
+ clock_class_uuid = bt_clock_class_get_uuid(clock_class);
+ }
+
+ switch (iterator->clock_expectation.type) {
+ case CLOCK_EXPECTATION_UNSET:
+ /*
+ * This is the first time we see a message with a clock
+ * snapshot: record the properties of that clock, against
+ * which we'll compare the clock properties of the following
+ * messages.
+ */
+
+ if (!clock_class) {
+ iterator->clock_expectation.type = CLOCK_EXPECTATION_NONE;
+ } else if (bt_clock_class_origin_is_unix_epoch(clock_class)) {
+ iterator->clock_expectation.type = CLOCK_EXPECTATION_ORIGIN_UNIX;
+ } else if (clock_class_uuid) {
+ iterator->clock_expectation.type = CLOCK_EXPECTATION_ORIGIN_OTHER_UUID;
+ memcpy(iterator->clock_expectation.uuid, clock_class_uuid, BABELTRACE_UUID_LEN);
+ } else {
+ iterator->clock_expectation.type = CLOCK_EXPECTATION_ORIGIN_OTHER_NO_UUID;
+ }
+ break;
+
+ case CLOCK_EXPECTATION_NONE:
+ if (clock_class) {
+ BT_ASSERT_PRE_MSG("Expecting no clock class, got one: %![cc-]+K",
+ clock_class);
+ result = false;
+ goto end;
+ }
+
+ break;
+
+ case CLOCK_EXPECTATION_ORIGIN_UNIX:
+ if (!clock_class) {
+ BT_ASSERT_PRE_MSG("Expecting a clock class, got none.");
+ result = false;
+ goto end;
+ }
+
+ if (!bt_clock_class_origin_is_unix_epoch(clock_class)) {
+ BT_ASSERT_PRE_MSG("Expecting a clock class with Unix epoch origin: %![cc-]+K",
+ clock_class);
+ result = false;
+ goto end;
+ }
+ break;
+
+ case CLOCK_EXPECTATION_ORIGIN_OTHER_UUID:
+ if (!clock_class) {
+ BT_ASSERT_PRE_MSG("Expecting a clock class, got none.");
+ result = false;
+ goto end;
+ }
+
+ if (bt_clock_class_origin_is_unix_epoch(clock_class)) {
+ BT_ASSERT_PRE_MSG("Expecting a clock class without Unix epoch origin: %![cc-]+K",
+ clock_class);
+ result = false;
+ goto end;
+ }
+
+ if (!clock_class_uuid) {
+ BT_ASSERT_PRE_MSG("Expecting a clock class with UUID: %![cc-]+K",
+ clock_class);
+ result = false;
+ goto end;
+ }
+
+ if (bt_uuid_compare(iterator->clock_expectation.uuid, clock_class_uuid)) {
+ BT_ASSERT_PRE_MSG("Expecting a clock class with UUID, got one "
+ "with a different UUID: %![cc-]+K, expected-uuid=%!u",
+ clock_class, iterator->clock_expectation.uuid);
+ result = false;
+ goto end;
+ }
+ break;
+
+ case CLOCK_EXPECTATION_ORIGIN_OTHER_NO_UUID:
+ if (!clock_class) {
+ BT_ASSERT_PRE_MSG("Expecting a clock class, got none.");
+ result = false;
+ goto end;
+ }
+
+ if (bt_clock_class_origin_is_unix_epoch(clock_class)) {
+ BT_ASSERT_PRE_MSG("Expecting a clock class without Unix epoch origin: %![cc-]+K",
+ clock_class);
+ result = false;
+ goto end;
+ }
+
+ if (clock_class_uuid) {
+ BT_ASSERT_PRE_MSG("Expecting a clock class without UUID: %![cc-]+K",
+ clock_class);
+ result = false;
+ goto end;
+ }
+ break;
+ }
+ }
+
+ result = true;
+
+end:
+ return result;
+}
+
+BT_ASSERT_PRE_FUNC
+static
+bool clock_classes_are_compatible(
+ struct bt_self_component_port_input_message_iterator *iterator,
+ bt_message_array_const msgs, uint64_t msg_count)
+{
+ uint64_t i;
+ bool result;
+
+ for (i = 0; i < msg_count; i++) {
+ if (!clock_classes_are_compatible_one(iterator, msgs[i])) {
+ result = false;
+ goto end;
+ }
+ }
+
+ result = true;
+
+end:
+ return result;
+}
+
+/*
+ * Call the `next` method of the iterator. Do some validation on the returned
+ * messages.
+ */
+
+static
+bt_message_iterator_status call_iterator_next_method(
+ struct bt_self_component_port_input_message_iterator *iterator,
+ bt_message_array_const msgs, uint64_t capacity, uint64_t *user_count)
+{
+ bt_message_iterator_status status;
+
+ BT_ASSERT(iterator->methods.next);
+ BT_LOGD_STR("Calling user's \"next\" method.");
+
+ status = iterator->methods.next(iterator, msgs, capacity, user_count);
+
+ if (status == BT_MESSAGE_ITERATOR_STATUS_OK) {
+ BT_ASSERT_PRE(clock_classes_are_compatible(iterator, msgs, *user_count),
+ "Clocks are not compatible");
+ BT_ASSERT_PRE(clock_snapshots_are_monotonic(iterator, msgs, *user_count),
+ "Clock snapshots are not monotonic");
+ }
+
+ return status;
+}
+
enum bt_message_iterator_status
bt_self_component_port_input_message_iterator_next(
struct bt_self_component_port_input_message_iterator *iterator,
* Call the user's "next" method to get the next messages
* and status.
*/
- BT_ASSERT(iterator->methods.next);
- BT_LOGD_STR("Calling user's \"next\" method.");
*user_count = 0;
- status = iterator->methods.next(iterator,
+ status = call_iterator_next_method(iterator,
(void *) iterator->base.msgs->pdata, MSG_BATCH_SIZE,
user_count);
BT_LOGD("User method returned: status=%s, msg-count=%" PRIu64,
set_self_comp_port_input_msg_iterator_state(iterator, new_state);
}
+static
+void reset_iterator_expectations(
+ struct bt_self_component_port_input_message_iterator *iterator)
+{
+ iterator->last_ns_from_origin = INT64_MIN;
+ iterator->clock_expectation.type = CLOCK_EXPECTATION_UNSET;
+}
+
enum bt_message_iterator_status
bt_self_component_port_input_message_iterator_seek_beginning(
struct bt_self_component_port_input_message_iterator *iterator)
bt_self_component_port_input_message_iterator_can_seek_beginning(
iterator),
"Message iterator cannot seek beginning: %!+i", iterator);
+
+ /*
+ * We are seeking, reset our expectations about how the following
+ * messages should look like.
+ */
+ reset_iterator_expectations(iterator);
+
BT_LIB_LOGD("Calling user's \"seek beginning\" method: %!+i", iterator);
set_self_comp_port_input_msg_iterator_state(iterator,
BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_SEEKING);
* Call the user's "next" method to get the next
* messages and status.
*/
- BT_LOGD_STR("Calling user's \"next\" method.");
- status = iterator->methods.next(iterator,
+ status = call_iterator_next_method(iterator,
&messages[0], MSG_BATCH_SIZE, &user_count);
BT_LOGD("User method returned: status=%s",
bt_message_iterator_status_string(status));
set_self_comp_port_input_msg_iterator_state(iterator,
BT_SELF_COMPONENT_PORT_INPUT_MESSAGE_ITERATOR_STATE_SEEKING);
+ /*
+ * We are seeking, reset our expectations about how the following
+ * messages should look like.
+ */
+ reset_iterator_expectations(iterator);
+
if (iterator->methods.seek_ns_from_origin) {
/* The iterator knows how to seek to a particular time, let it handle this. */
BT_LIB_LOGD("Calling user's \"seek nanoseconds from origin\" method: "
}
}
+ /*
+ * The following messages returned by the next method (including
+ * post_auto_seek_next) must be after (or at) `ns_from_origin`.
+ */
+ iterator->last_ns_from_origin = ns_from_origin;
+
end:
if (stream_states) {
destroy_auto_seek_stream_states(stream_states);
projects / babeltrace.git / commitdiff
