- struct bt_ctf_event_class *event_class_a = element;
- struct search_query *search_query = query;
- struct bt_ctf_event_class *event_class_b = search_query->value;
- int64_t id_a, id_b;
-
- if (search_query->value == element) {
- search_query->found = 1;
- goto end;
- }
-
- /*
- * Two event classes cannot share the same name in a given
- * stream class.
- */
- if (!strcmp(bt_ctf_event_class_get_name(event_class_a),
- bt_ctf_event_class_get_name(event_class_b))) {
- search_query->found = 1;
- goto end;
- }
-
- /*
- * Two event classes cannot share the same ID in a given
- * stream class.
- */
- id_a = bt_ctf_event_class_get_id(event_class_a);
- id_b = bt_ctf_event_class_get_id(event_class_b);
-
- if (id_a < 0 || id_b < 0) {
- /* at least one ID is not set: will be automatically set later */
- goto end;
- }
-
- if (id_a == id_b) {
- search_query->found = 1;
- goto end;
- }
-
-end:
- return;
-}
-
-int bt_ctf_stream_class_add_event_class(
- struct bt_ctf_stream_class *stream_class,
- struct bt_ctf_event_class *event_class)
-{
- int ret = 0;
- int64_t *event_id = NULL;
- struct bt_ctf_trace *trace = NULL;
- struct bt_ctf_stream_class *old_stream_class = NULL;
- struct bt_ctf_validation_output validation_output = { 0 };
- struct bt_ctf_field_type *packet_header_type = NULL;
- struct bt_ctf_field_type *packet_context_type = NULL;
- struct bt_ctf_field_type *event_header_type = NULL;
- struct bt_ctf_field_type *stream_event_ctx_type = NULL;
- struct bt_ctf_field_type *event_context_type = NULL;
- struct bt_ctf_field_type *event_payload_type = NULL;
- const enum bt_ctf_validation_flag validation_flags =
- BT_CTF_VALIDATION_FLAG_EVENT;
-
- if (!stream_class || !event_class) {
- ret = -1;
- goto end;
- }
-
- event_id = g_new(int64_t, 1);
- if (!event_id) {
- ret = -1;
- goto end;
- }
-
- /* Check for duplicate event classes */
- struct search_query query = { .value = event_class, .found = 0 };
- g_ptr_array_foreach(stream_class->event_classes, event_class_exists,
- &query);
- if (query.found) {
- ret = -1;
- goto end;
- }
-
- old_stream_class = bt_ctf_event_class_get_stream_class(event_class);
- if (old_stream_class) {
- /* Event class is already associated to a stream class. */
- ret = -1;
- goto end;
- }
-
- trace = bt_ctf_stream_class_get_trace(stream_class);
- if (trace) {
- /*
- * If the stream class is associated with a trace, then
- * both those objects are frozen. Also, this event class
- * is about to be frozen.
- *
- * Therefore the event class must be validated here.
- * The trace and stream class should be valid at this
- * point.
- */
- assert(trace->valid);
- assert(stream_class->valid);
- packet_header_type =
- bt_ctf_trace_get_packet_header_type(trace);
- packet_context_type =
- bt_ctf_stream_class_get_packet_context_type(
- stream_class);
- event_header_type =
- bt_ctf_stream_class_get_event_header_type(stream_class);
- stream_event_ctx_type =
- bt_ctf_stream_class_get_event_context_type(
- stream_class);
- event_context_type =
- bt_ctf_event_class_get_context_type(event_class);
- event_payload_type =
- bt_ctf_event_class_get_payload_type(event_class);
- ret = bt_ctf_validate_class_types(
- trace->environment, packet_header_type,
- packet_context_type, event_header_type,
- stream_event_ctx_type, event_context_type,
- event_payload_type, trace->valid,
- stream_class->valid, event_class->valid,
- &validation_output, validation_flags);
- BT_PUT(packet_header_type);
- BT_PUT(packet_context_type);
- BT_PUT(event_header_type);
- BT_PUT(stream_event_ctx_type);
- BT_PUT(event_context_type);
- BT_PUT(event_payload_type);
-
- if (ret) {
- /*
- * This means something went wrong during the
- * validation process, not that the objects are
- * invalid.
- */
- goto end;
- }
-
- if ((validation_output.valid_flags & validation_flags) !=
- validation_flags) {
- /* Invalid event class */
- ret = -1;
- goto end;
- }
- }
-
- /* Only set an event ID if none was explicitly set before */
- *event_id = bt_ctf_event_class_get_id(event_class);
- if (*event_id < 0) {
- if (bt_ctf_event_class_set_id(event_class,
- stream_class->next_event_id++)) {
- ret = -1;
- goto end;
- }
- *event_id = stream_class->next_event_id;
- }
-
- ret = bt_ctf_event_class_set_stream_id(event_class, stream_class->id);
- if (ret) {
- goto end;
- }
-
- bt_object_set_parent(event_class, stream_class);
-
- if (trace) {
- /*
- * At this point we know that the function will be
- * successful. Therefore we can replace the event
- * class's field types with what's in the validation
- * output structure and mark this event class as valid.
- */
- bt_ctf_validation_replace_types(NULL, NULL, event_class,
- &validation_output, validation_flags);
- event_class->valid = 1;
-
- /*
- * Put what was not moved in
- * bt_ctf_validation_replace_types().
- */
- bt_ctf_validation_output_put_types(&validation_output);
- }
-
- /* Add to the event classes of the stream class */
- g_ptr_array_add(stream_class->event_classes, event_class);
- g_hash_table_insert(stream_class->event_classes_ht, event_id,
- event_class);
- event_id = NULL;
-
- /* Freeze the event class */
- bt_ctf_event_class_freeze(event_class);
-
- /* Notifiy listeners of the trace's schema modification. */
- if (trace) {
- struct bt_ctf_object obj = { .object = event_class,
- .type = BT_CTF_OBJECT_TYPE_EVENT_CLASS };
-
- (void) bt_ctf_trace_object_modification(&obj, trace);
- }
-end:
- BT_PUT(trace);
- BT_PUT(old_stream_class);
- bt_ctf_validation_output_put_types(&validation_output);
- assert(!packet_header_type);
- assert(!packet_context_type);
- assert(!event_header_type);
- assert(!stream_event_ctx_type);
- assert(!event_context_type);
- assert(!event_payload_type);
- g_free(event_id);
-
- return ret;