+ # Release the reference to the native part.
+ ptr = msg._release()
+ return int(ptr)
+
+ # Validate that the presence or lack of presence of a
+ # `default_clock_snapshot` value is valid in the context of `stream_class`.
+ @staticmethod
+ def _validate_default_clock_snapshot(stream_class, default_clock_snapshot):
+ stream_class_has_default_clock_class = stream_class.default_clock_class is not None
+
+ if stream_class_has_default_clock_class and default_clock_snapshot is None:
+ raise bt2.Error(
+ 'stream class has a default clock class, default_clock_snapshot should not be None')
+
+ if not stream_class_has_default_clock_class and default_clock_snapshot is not None:
+ raise bt2.Error(
+ 'stream class has no default clock class, default_clock_snapshot should be None')
+
+ def _create_event_message(self, event_class, packet, default_clock_snapshot=None):
+ utils._check_type(event_class, bt2.event_class.EventClass)
+ utils._check_type(packet, bt2.packet._Packet)
+ self._validate_default_clock_snapshot(packet.stream.stream_class, default_clock_snapshot)
+
+ if default_clock_snapshot is not None:
+ utils._check_uint64(default_clock_snapshot)
+ ptr = native_bt.message_event_create_with_default_clock_snapshot(
+ self._ptr, event_class._ptr, packet._ptr, default_clock_snapshot)
+ else:
+ ptr = native_bt.message_event_create(
+ self._ptr, event_class._ptr, packet._ptr)
+
+ if ptr is None:
+ raise bt2.CreationError('cannot create event message object')
+
+ return bt2.message._EventMessage(ptr)
+
+ def _create_stream_beginning_message(self, stream):
+ utils._check_type(stream, bt2.stream._Stream)
+
+ ptr = native_bt.message_stream_beginning_create(self._ptr, stream._ptr)
+ if ptr is None:
+ raise bt2.CreationError('cannot create stream beginning message object')
+
+ return bt2.message._StreamBeginningMessage(ptr)
+
+ def _create_packet_beginning_message(self, packet, default_clock_snapshot=None):
+ utils._check_type(packet, bt2.packet._Packet)
+
+ if packet.stream.stream_class.packets_have_default_beginning_clock_snapshot:
+ if default_clock_snapshot is None:
+ raise bt2.CreationError("packet beginning messages in this stream must have a default clock snapshots")
+
+ utils._check_uint64(default_clock_snapshot)
+ ptr = native_bt.message_packet_beginning_create_with_default_clock_snapshot(
+ self._ptr, packet._ptr, default_clock_snapshot)
+ else:
+ if default_clock_snapshot is not None:
+ raise bt2.CreationError("packet beginning messages in this stream must not have a default clock snapshots")
+
+ ptr = native_bt.message_packet_beginning_create(self._ptr, packet._ptr)
+
+ if ptr is None:
+ raise bt2.CreationError('cannot create packet beginning message object')
+
+ return bt2.message._PacketBeginningMessage(ptr)