+ cc_uuid = bt_ctf_clock_class_get_uuid(clock_class);
+
+ if (muxer_notif_iter->clock_class_expectation ==
+ MUXER_NOTIF_ITER_CLOCK_CLASS_EXPECTATION_ANY) {
+ /*
+ * This is the first clock class that this muxer
+ * notification iterator encounters. Its properties
+ * determine what to expect for the whole lifetime of
+ * the iterator without a true
+ * `assume-absolute-clock-classes` parameter.
+ */
+ if (bt_ctf_clock_class_is_absolute(clock_class)) {
+ /* Expect absolute clock classes */
+ muxer_notif_iter->clock_class_expectation =
+ MUXER_NOTIF_ITER_CLOCK_CLASS_EXPECTATION_ABSOLUTE;
+ } else {
+ if (cc_uuid) {
+ /*
+ * Expect non-absolute clock classes
+ * with a specific UUID.
+ */
+ muxer_notif_iter->clock_class_expectation =
+ MUXER_NOTIF_ITER_CLOCK_CLASS_EXPECTATION_NOT_ABS_SPEC_UUID;
+ memcpy(muxer_notif_iter->expected_clock_class_uuid,
+ cc_uuid, BABELTRACE_UUID_LEN);
+ } else {
+ /*
+ * Expect non-absolute clock classes
+ * with no UUID.
+ */
+ muxer_notif_iter->clock_class_expectation =
+ MUXER_NOTIF_ITER_CLOCK_CLASS_EXPECTATION_NOT_ABS_NO_UUID;
+ }
+ }
+ }
+
+ if (!muxer_comp->assume_absolute_clock_classes) {
+ switch (muxer_notif_iter->clock_class_expectation) {
+ case MUXER_NOTIF_ITER_CLOCK_CLASS_EXPECTATION_ABSOLUTE:
+ if (!bt_ctf_clock_class_is_absolute(clock_class)) {
+ goto error;
+ }
+ break;
+ case MUXER_NOTIF_ITER_CLOCK_CLASS_EXPECTATION_NOT_ABS_NO_UUID:
+ if (bt_ctf_clock_class_is_absolute(clock_class)) {
+ goto error;
+ }
+
+ if (cc_uuid) {
+ goto error;
+ }
+ break;
+ case MUXER_NOTIF_ITER_CLOCK_CLASS_EXPECTATION_NOT_ABS_SPEC_UUID:
+ if (bt_ctf_clock_class_is_absolute(clock_class)) {
+ goto error;
+ }
+
+ if (!cc_uuid) {
+ goto error;
+ }
+
+ if (memcmp(muxer_notif_iter->expected_clock_class_uuid,
+ cc_uuid, BABELTRACE_UUID_LEN) != 0) {
+ goto error;
+ }
+ break;
+ default:
+ /* Unexpected */
+ abort();
+ }