| 1 | import bt2 |
| 2 | |
| 3 | |
| 4 | class TheIteratorOfAllEvil(bt2._UserMessageIterator): |
| 5 | def __init__(self, config, port): |
| 6 | tc, sc, ec1, ec2, params = port.user_data |
| 7 | trace = tc() |
| 8 | stream = trace.create_stream(sc) |
| 9 | |
| 10 | # Test with and without packets, once packets are optional. |
| 11 | packet = stream.create_packet() |
| 12 | |
| 13 | if params['with-stream-msgs-cs']: |
| 14 | sb_msg = self._create_stream_beginning_message(stream, 100) |
| 15 | else: |
| 16 | sb_msg = self._create_stream_beginning_message(stream) |
| 17 | |
| 18 | ev_msg1 = self._create_event_message(ec1, packet, 300) |
| 19 | ev_msg2 = self._create_event_message(ec2, packet, 400) |
| 20 | |
| 21 | if params['with-stream-msgs-cs']: |
| 22 | se_msg = self._create_stream_end_message(stream, 1000) |
| 23 | else: |
| 24 | se_msg = self._create_stream_end_message(stream) |
| 25 | |
| 26 | self._msgs = [ |
| 27 | sb_msg, |
| 28 | self._create_packet_beginning_message(packet, 200), |
| 29 | ev_msg1, |
| 30 | ev_msg2, |
| 31 | self._create_packet_end_message(packet, 900), |
| 32 | se_msg, |
| 33 | ] |
| 34 | self._at = 0 |
| 35 | config.can_seek_forward = True |
| 36 | |
| 37 | def _user_seek_beginning(self): |
| 38 | self._at = 0 |
| 39 | |
| 40 | def __next__(self): |
| 41 | if self._at < len(self._msgs): |
| 42 | msg = self._msgs[self._at] |
| 43 | self._at += 1 |
| 44 | return msg |
| 45 | else: |
| 46 | raise StopIteration |
| 47 | |
| 48 | |
| 49 | @bt2.plugin_component_class |
| 50 | class TheSourceOfAllEvil( |
| 51 | bt2._UserSourceComponent, message_iterator_class=TheIteratorOfAllEvil |
| 52 | ): |
| 53 | def __init__(self, config, params, obj): |
| 54 | tc = self._create_trace_class() |
| 55 | |
| 56 | # Use a clock class with an offset, so we can test with --begin or --end |
| 57 | # smaller than this offset (in other words, a time that it's not |
| 58 | # possible to represent with this clock class). |
| 59 | cc = self._create_clock_class(frequency=1, offset=bt2.ClockClassOffset(10000)) |
| 60 | sc = tc.create_stream_class( |
| 61 | default_clock_class=cc, |
| 62 | supports_packets=True, |
| 63 | packets_have_beginning_default_clock_snapshot=True, |
| 64 | packets_have_end_default_clock_snapshot=True, |
| 65 | ) |
| 66 | ec1 = sc.create_event_class(name='event 1') |
| 67 | ec2 = sc.create_event_class(name='event 2') |
| 68 | self._add_output_port('out', (tc, sc, ec1, ec2, params)) |
| 69 | |
| 70 | |
| 71 | bt2.register_plugin(__name__, 'test-trimmer') |