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81447b5b PP |
1 | # The MIT License (MIT) |
2 | # | |
3 | # Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com> | |
4 | # | |
5 | # Permission is hereby granted, free of charge, to any person obtaining a copy | |
6 | # of this software and associated documentation files (the "Software"), to deal | |
7 | # in the Software without restriction, including without limitation the rights | |
8 | # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
9 | # copies of the Software, and to permit persons to whom the Software is | |
10 | # furnished to do so, subject to the following conditions: | |
11 | # | |
12 | # The above copyright notice and this permission notice shall be included in | |
13 | # all copies or substantial portions of the Software. | |
14 | # | |
15 | # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
18 | # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
21 | # THE SOFTWARE. | |
22 | ||
23 | from bt2 import native_bt, object, utils | |
c946c9de | 24 | from bt2 import message as bt2_message |
81447b5b | 25 | import collections.abc |
c946c9de PP |
26 | from bt2 import stream as bt2_stream |
27 | from bt2 import event_class as bt2_event_class | |
28 | from bt2 import packet as bt2_packet | |
29 | from bt2 import port as bt2_port | |
30 | from bt2 import clock_class as bt2_clock_class | |
81447b5b PP |
31 | import bt2 |
32 | ||
33 | ||
fa4c33e3 | 34 | class _MessageIterator(collections.abc.Iterator): |
81447b5b | 35 | def __next__(self): |
f6a5e476 | 36 | raise NotImplementedError |
81447b5b PP |
37 | |
38 | ||
a43da05a | 39 | class _UserComponentInputPortMessageIterator(object._SharedObject, _MessageIterator): |
fbd8a4e0 PP |
40 | _get_ref = staticmethod(native_bt.message_iterator_get_ref) |
41 | _put_ref = staticmethod(native_bt.message_iterator_put_ref) | |
a43da05a | 42 | |
27d97a3f | 43 | def __init__(self, ptr): |
61d96b89 FD |
44 | self._current_msgs = [] |
45 | self._at = 0 | |
46 | super().__init__(ptr) | |
f6a5e476 PP |
47 | |
48 | def __next__(self): | |
27d97a3f | 49 | if len(self._current_msgs) == self._at: |
a43da05a SM |
50 | status, msgs = native_bt.bt2_self_component_port_input_get_msg_range( |
51 | self._ptr | |
52 | ) | |
61d96b89 FD |
53 | utils._handle_func_status( |
54 | status, 'unexpected error: cannot advance the message iterator' | |
55 | ) | |
27d97a3f SM |
56 | self._current_msgs = msgs |
57 | self._at = 0 | |
58 | ||
59 | msg_ptr = self._current_msgs[self._at] | |
60 | self._at += 1 | |
61 | ||
c946c9de | 62 | return bt2_message._create_from_ptr(msg_ptr) |
81447b5b | 63 | |
39ddfa44 | 64 | def can_seek_beginning(self): |
fbd8a4e0 | 65 | (status, res) = native_bt.message_iterator_can_seek_beginning(self._ptr) |
9e8e8b43 SM |
66 | utils._handle_func_status( |
67 | status, | |
68 | 'cannot check whether or not message iterator can seek its beginning', | |
69 | ) | |
39ddfa44 SM |
70 | return res != 0 |
71 | ||
72 | def seek_beginning(self): | |
2a02ed93 | 73 | # Forget about buffered messages, they won't be valid after seeking. |
39ddfa44 SM |
74 | self._current_msgs.clear() |
75 | self._at = 0 | |
76 | ||
fbd8a4e0 | 77 | status = native_bt.message_iterator_seek_beginning(self._ptr) |
61d96b89 | 78 | utils._handle_func_status(status, 'cannot seek message iterator beginning') |
39ddfa44 | 79 | |
24a68958 SM |
80 | def can_seek_ns_from_origin(self, ns_from_origin): |
81 | utils._check_int64(ns_from_origin) | |
fbd8a4e0 | 82 | (status, res) = native_bt.message_iterator_can_seek_ns_from_origin( |
24a68958 SM |
83 | self._ptr, ns_from_origin |
84 | ) | |
85 | utils._handle_func_status( | |
86 | status, | |
87 | 'cannot check whether or not message iterator can seek given ns from origin', | |
88 | ) | |
89 | return res != 0 | |
90 | ||
91 | def seek_ns_from_origin(self, ns_from_origin): | |
92 | utils._check_int64(ns_from_origin) | |
93 | ||
94 | # Forget about buffered messages, they won't be valid after seeking. | |
95 | self._current_msgs.clear() | |
96 | self._at = 0 | |
97 | ||
fbd8a4e0 | 98 | status = native_bt.message_iterator_seek_ns_from_origin( |
24a68958 SM |
99 | self._ptr, ns_from_origin |
100 | ) | |
101 | utils._handle_func_status( | |
102 | status, 'message iterator cannot seek given ns from origin' | |
103 | ) | |
104 | ||
9415de1c SM |
105 | @property |
106 | def can_seek_forward(self): | |
fbd8a4e0 | 107 | return native_bt.message_iterator_can_seek_forward(self._ptr) |
9415de1c SM |
108 | |
109 | ||
110 | class _MessageIteratorConfiguration: | |
111 | def __init__(self, ptr): | |
112 | self._ptr = ptr | |
113 | ||
114 | def can_seek_forward(self, value): | |
115 | utils._check_bool(value) | |
116 | native_bt.self_message_iterator_configuration_set_can_seek_forward( | |
117 | self._ptr, value | |
118 | ) | |
119 | ||
120 | can_seek_forward = property(fset=can_seek_forward) | |
121 | ||
f6a5e476 | 122 | |
a4dcfa96 SM |
123 | # This is extended by the user to implement component classes in Python. It |
124 | # is created for a given output port when an input port message iterator is | |
125 | # created on the input port on the other side of the connection. It is also | |
126 | # created when an output port message iterator is created on this output port. | |
127 | # | |
128 | # Its purpose is to feed the messages that should go out through this output | |
129 | # port. | |
fa4c33e3 | 130 | class _UserMessageIterator(_MessageIterator): |
81447b5b | 131 | def __new__(cls, ptr): |
f6a5e476 | 132 | # User iterator objects are always created by the native side, |
81447b5b PP |
133 | # that is, never instantiated directly by Python code. |
134 | # | |
f6a5e476 PP |
135 | # The native code calls this, then manually calls |
136 | # self.__init__() without the `ptr` argument. The user has | |
137 | # access to self.component during this call, thanks to this | |
deec48a6 | 138 | # self._bt_ptr argument being set. |
81447b5b | 139 | # |
deec48a6 | 140 | # self._bt_ptr is NOT owned by this object here, so there's nothing |
81447b5b PP |
141 | # to do in __del__(). |
142 | self = super().__new__(cls) | |
deec48a6 | 143 | self._bt_ptr = ptr |
81447b5b PP |
144 | return self |
145 | ||
9415de1c | 146 | def _bt_init_from_native(self, config_ptr, self_output_port_ptr): |
c946c9de | 147 | self_output_port = bt2_port._create_self_from_ptr_and_get_ref( |
61d96b89 FD |
148 | self_output_port_ptr, native_bt.PORT_TYPE_OUTPUT |
149 | ) | |
9415de1c SM |
150 | config = _MessageIteratorConfiguration(config_ptr) |
151 | self.__init__(config, self_output_port) | |
a4dcfa96 | 152 | |
9415de1c | 153 | def __init__(self, config, self_output_port): |
81447b5b PP |
154 | pass |
155 | ||
156 | @property | |
f6a5e476 | 157 | def _component(self): |
deec48a6 | 158 | return native_bt.bt2_get_user_component_from_user_msg_iter(self._bt_ptr) |
81447b5b | 159 | |
3f9a359f SM |
160 | @property |
161 | def _port(self): | |
162 | port_ptr = native_bt.self_message_iterator_borrow_port(self._bt_ptr) | |
163 | assert port_ptr is not None | |
164 | return bt2_port._create_self_from_ptr_and_get_ref( | |
165 | port_ptr, native_bt.PORT_TYPE_OUTPUT | |
166 | ) | |
167 | ||
81447b5b PP |
168 | @property |
169 | def addr(self): | |
deec48a6 | 170 | return int(self._bt_ptr) |
81447b5b | 171 | |
d73bb381 PP |
172 | @property |
173 | def _is_interrupted(self): | |
174 | return bool(native_bt.self_message_iterator_is_interrupted(self._bt_ptr)) | |
175 | ||
819d0ae7 | 176 | def _user_finalize(self): |
81447b5b PP |
177 | pass |
178 | ||
f6a5e476 PP |
179 | def __next__(self): |
180 | raise bt2.Stop | |
181 | ||
deec48a6 | 182 | def _bt_next_from_native(self): |
f6a5e476 PP |
183 | # this can raise anything: it's catched by the native part |
184 | try: | |
fa4c33e3 | 185 | msg = next(self) |
f6a5e476 PP |
186 | except StopIteration: |
187 | raise bt2.Stop | |
5760d571 | 188 | except Exception: |
f6a5e476 PP |
189 | raise |
190 | ||
9cbe0c59 | 191 | utils._check_type(msg, bt2_message._MessageConst) |
81447b5b | 192 | |
4e853135 SM |
193 | # The reference we return will be given to the message array. |
194 | # However, the `msg` Python object may stay alive, if the user has kept | |
195 | # a reference to it. Acquire a new reference to account for that. | |
196 | msg._get_ref(msg._ptr) | |
197 | return int(msg._ptr) | |
27d97a3f | 198 | |
deec48a6 | 199 | def _bt_can_seek_beginning_from_native(self): |
39ddfa44 SM |
200 | # Here, we mimic the behavior of the C API: |
201 | # | |
5c836b95 | 202 | # - If the iterator has a _user_can_seek_beginning method, |
819d0ae7 | 203 | # read it and use that result. |
9fa5c517 | 204 | # - Otherwise, the presence or absence of a `_user_seek_beginning` |
39ddfa44 | 205 | # method indicates whether the iterator can seek beginning. |
819d0ae7 | 206 | if hasattr(self, '_user_can_seek_beginning'): |
5c836b95 | 207 | can_seek_beginning = self._user_can_seek_beginning() |
39ddfa44 SM |
208 | utils._check_bool(can_seek_beginning) |
209 | return can_seek_beginning | |
210 | else: | |
819d0ae7 | 211 | return hasattr(self, '_user_seek_beginning') |
39ddfa44 | 212 | |
deec48a6 | 213 | def _bt_seek_beginning_from_native(self): |
819d0ae7 | 214 | self._user_seek_beginning() |
39ddfa44 | 215 | |
24a68958 | 216 | def _bt_can_seek_ns_from_origin_from_native(self, ns_from_origin): |
c49bf79b SM |
217 | # Return whether the iterator can seek ns from origin using the |
218 | # user-implemented seek_ns_from_origin method. We mimic the behavior | |
219 | # of the C API: | |
24a68958 SM |
220 | # |
221 | # - If the iterator has a _user_can_seek_ns_from_origin method, | |
222 | # call it and use its return value. | |
223 | # - Otherwise, if there is a `_user_seek_ns_from_origin` method, | |
224 | # we presume it's possible. | |
c49bf79b | 225 | |
24a68958 SM |
226 | if hasattr(self, '_user_can_seek_ns_from_origin'): |
227 | can_seek_ns_from_origin = self._user_can_seek_ns_from_origin(ns_from_origin) | |
228 | utils._check_bool(can_seek_ns_from_origin) | |
229 | return can_seek_ns_from_origin | |
24a68958 | 230 | else: |
c49bf79b | 231 | return hasattr(self, '_user_seek_ns_from_origin') |
24a68958 SM |
232 | |
233 | def _bt_seek_ns_from_origin_from_native(self, ns_from_origin): | |
234 | self._user_seek_ns_from_origin(ns_from_origin) | |
235 | ||
fbd8a4e0 | 236 | def _create_message_iterator(self, input_port): |
c946c9de | 237 | utils._check_type(input_port, bt2_port._UserComponentInputPort) |
692f1a01 | 238 | |
c1491996 FD |
239 | ( |
240 | status, | |
241 | msg_iter_ptr, | |
fbd8a4e0 | 242 | ) = native_bt.bt2_message_iterator_create_from_message_iterator( |
692f1a01 PP |
243 | self._bt_ptr, input_port._ptr |
244 | ) | |
ab8b2b1b SM |
245 | utils._handle_func_status(status, 'cannot create message iterator object') |
246 | assert msg_iter_ptr is not None | |
692f1a01 PP |
247 | |
248 | return _UserComponentInputPortMessageIterator(msg_iter_ptr) | |
249 | ||
363f4bcf | 250 | def _create_event_message(self, event_class, parent, default_clock_snapshot=None): |
c946c9de | 251 | utils._check_type(event_class, bt2_event_class._EventClass) |
37a93d41 PP |
252 | |
253 | if event_class.stream_class.supports_packets: | |
c946c9de | 254 | utils._check_type(parent, bt2_packet._Packet) |
37a93d41 | 255 | else: |
c946c9de | 256 | utils._check_type(parent, bt2_stream._Stream) |
27d97a3f SM |
257 | |
258 | if default_clock_snapshot is not None: | |
dcd94213 | 259 | if event_class.stream_class.default_clock_class is None: |
61d96b89 FD |
260 | raise ValueError( |
261 | 'event messages in this stream must not have a default clock snapshot' | |
262 | ) | |
dcd94213 | 263 | |
27d97a3f | 264 | utils._check_uint64(default_clock_snapshot) |
37a93d41 PP |
265 | |
266 | if event_class.stream_class.supports_packets: | |
267 | ptr = native_bt.message_event_create_with_packet_and_default_clock_snapshot( | |
61d96b89 FD |
268 | self._bt_ptr, event_class._ptr, parent._ptr, default_clock_snapshot |
269 | ) | |
37a93d41 PP |
270 | else: |
271 | ptr = native_bt.message_event_create_with_default_clock_snapshot( | |
61d96b89 FD |
272 | self._bt_ptr, event_class._ptr, parent._ptr, default_clock_snapshot |
273 | ) | |
27d97a3f | 274 | else: |
dcd94213 | 275 | if event_class.stream_class.default_clock_class is not None: |
61d96b89 FD |
276 | raise ValueError( |
277 | 'event messages in this stream must have a default clock snapshot' | |
278 | ) | |
dcd94213 | 279 | |
37a93d41 PP |
280 | if event_class.stream_class.supports_packets: |
281 | ptr = native_bt.message_event_create_with_packet( | |
61d96b89 FD |
282 | self._bt_ptr, event_class._ptr, parent._ptr |
283 | ) | |
37a93d41 PP |
284 | else: |
285 | ptr = native_bt.message_event_create( | |
61d96b89 FD |
286 | self._bt_ptr, event_class._ptr, parent._ptr |
287 | ) | |
27d97a3f SM |
288 | |
289 | if ptr is None: | |
614743a5 | 290 | raise bt2._MemoryError('cannot create event message object') |
27d97a3f | 291 | |
c946c9de | 292 | return bt2_message._EventMessage(ptr) |
27d97a3f | 293 | |
0010c8b0 | 294 | def _create_message_iterator_inactivity_message(self, clock_class, clock_snapshot): |
c946c9de | 295 | utils._check_type(clock_class, bt2_clock_class._ClockClass) |
0010c8b0 | 296 | ptr = native_bt.message_message_iterator_inactivity_create( |
61d96b89 FD |
297 | self._bt_ptr, clock_class._ptr, clock_snapshot |
298 | ) | |
0010c8b0 SM |
299 | |
300 | if ptr is None: | |
614743a5 | 301 | raise bt2._MemoryError('cannot create inactivity message object') |
0010c8b0 | 302 | |
c946c9de | 303 | return bt2_message._MessageIteratorInactivityMessage(ptr) |
0010c8b0 | 304 | |
b7cbc799 | 305 | def _create_stream_beginning_message(self, stream, default_clock_snapshot=None): |
c946c9de | 306 | utils._check_type(stream, bt2_stream._Stream) |
27d97a3f | 307 | |
deec48a6 | 308 | ptr = native_bt.message_stream_beginning_create(self._bt_ptr, stream._ptr) |
27d97a3f | 309 | if ptr is None: |
614743a5 | 310 | raise bt2._MemoryError('cannot create stream beginning message object') |
27d97a3f | 311 | |
c946c9de | 312 | msg = bt2_message._StreamBeginningMessage(ptr) |
0010c8b0 | 313 | |
b7cbc799 SM |
314 | if default_clock_snapshot is not None: |
315 | msg._default_clock_snapshot = default_clock_snapshot | |
0010c8b0 | 316 | |
0010c8b0 SM |
317 | return msg |
318 | ||
b7cbc799 | 319 | def _create_stream_end_message(self, stream, default_clock_snapshot=None): |
c946c9de | 320 | utils._check_type(stream, bt2_stream._Stream) |
871a292a | 321 | |
deec48a6 | 322 | ptr = native_bt.message_stream_end_create(self._bt_ptr, stream._ptr) |
871a292a | 323 | if ptr is None: |
614743a5 | 324 | raise bt2._MemoryError('cannot create stream end message object') |
871a292a | 325 | |
c946c9de | 326 | msg = bt2_message._StreamEndMessage(ptr) |
b7cbc799 SM |
327 | |
328 | if default_clock_snapshot is not None: | |
329 | msg._default_clock_snapshot = default_clock_snapshot | |
330 | ||
331 | return msg | |
871a292a | 332 | |
27d97a3f | 333 | def _create_packet_beginning_message(self, packet, default_clock_snapshot=None): |
c946c9de | 334 | utils._check_type(packet, bt2_packet._Packet) |
27d97a3f | 335 | |
c88be1c8 | 336 | if packet.stream.cls.packets_have_beginning_default_clock_snapshot: |
27d97a3f | 337 | if default_clock_snapshot is None: |
61d96b89 FD |
338 | raise ValueError( |
339 | "packet beginning messages in this stream must have a default clock snapshot" | |
340 | ) | |
27d97a3f SM |
341 | |
342 | utils._check_uint64(default_clock_snapshot) | |
343 | ptr = native_bt.message_packet_beginning_create_with_default_clock_snapshot( | |
61d96b89 FD |
344 | self._bt_ptr, packet._ptr, default_clock_snapshot |
345 | ) | |
27d97a3f SM |
346 | else: |
347 | if default_clock_snapshot is not None: | |
61d96b89 FD |
348 | raise ValueError( |
349 | "packet beginning messages in this stream must not have a default clock snapshot" | |
350 | ) | |
27d97a3f | 351 | |
deec48a6 | 352 | ptr = native_bt.message_packet_beginning_create(self._bt_ptr, packet._ptr) |
27d97a3f SM |
353 | |
354 | if ptr is None: | |
614743a5 | 355 | raise bt2._MemoryError('cannot create packet beginning message object') |
27d97a3f | 356 | |
c946c9de | 357 | return bt2_message._PacketBeginningMessage(ptr) |
871a292a SM |
358 | |
359 | def _create_packet_end_message(self, packet, default_clock_snapshot=None): | |
c946c9de | 360 | utils._check_type(packet, bt2_packet._Packet) |
871a292a | 361 | |
c88be1c8 | 362 | if packet.stream.cls.packets_have_end_default_clock_snapshot: |
0010c8b0 | 363 | if default_clock_snapshot is None: |
61d96b89 FD |
364 | raise ValueError( |
365 | "packet end messages in this stream must have a default clock snapshot" | |
366 | ) | |
0010c8b0 | 367 | |
871a292a SM |
368 | utils._check_uint64(default_clock_snapshot) |
369 | ptr = native_bt.message_packet_end_create_with_default_clock_snapshot( | |
61d96b89 FD |
370 | self._bt_ptr, packet._ptr, default_clock_snapshot |
371 | ) | |
871a292a | 372 | else: |
0010c8b0 | 373 | if default_clock_snapshot is not None: |
61d96b89 FD |
374 | raise ValueError( |
375 | "packet end messages in this stream must not have a default clock snapshot" | |
376 | ) | |
0010c8b0 | 377 | |
deec48a6 | 378 | ptr = native_bt.message_packet_end_create(self._bt_ptr, packet._ptr) |
871a292a SM |
379 | |
380 | if ptr is None: | |
614743a5 | 381 | raise bt2._MemoryError('cannot create packet end message object') |
871a292a | 382 | |
c946c9de | 383 | return bt2_message._PacketEndMessage(ptr) |
0010c8b0 | 384 | |
61d96b89 FD |
385 | def _create_discarded_events_message( |
386 | self, stream, count=None, beg_clock_snapshot=None, end_clock_snapshot=None | |
387 | ): | |
c946c9de | 388 | utils._check_type(stream, bt2_stream._Stream) |
0010c8b0 | 389 | |
c88be1c8 | 390 | if not stream.cls.supports_discarded_events: |
77037b2b PP |
391 | raise ValueError('stream class does not support discarded events') |
392 | ||
c88be1c8 | 393 | if stream.cls.discarded_events_have_default_clock_snapshots: |
77037b2b | 394 | if beg_clock_snapshot is None or end_clock_snapshot is None: |
61d96b89 FD |
395 | raise ValueError( |
396 | 'discarded events have default clock snapshots for this stream class' | |
397 | ) | |
77037b2b | 398 | |
0010c8b0 SM |
399 | utils._check_uint64(beg_clock_snapshot) |
400 | utils._check_uint64(end_clock_snapshot) | |
401 | ptr = native_bt.message_discarded_events_create_with_default_clock_snapshots( | |
61d96b89 FD |
402 | self._bt_ptr, stream._ptr, beg_clock_snapshot, end_clock_snapshot |
403 | ) | |
0010c8b0 | 404 | else: |
77037b2b | 405 | if beg_clock_snapshot is not None or end_clock_snapshot is not None: |
61d96b89 FD |
406 | raise ValueError( |
407 | 'discarded events have no default clock snapshots for this stream class' | |
408 | ) | |
77037b2b | 409 | |
61d96b89 | 410 | ptr = native_bt.message_discarded_events_create(self._bt_ptr, stream._ptr) |
0010c8b0 SM |
411 | |
412 | if ptr is None: | |
614743a5 | 413 | raise bt2._MemoryError('cannot discarded events message object') |
0010c8b0 | 414 | |
c946c9de | 415 | msg = bt2_message._DiscardedEventsMessage(ptr) |
0010c8b0 SM |
416 | |
417 | if count is not None: | |
418 | msg._count = count | |
419 | ||
420 | return msg | |
421 | ||
61d96b89 FD |
422 | def _create_discarded_packets_message( |
423 | self, stream, count=None, beg_clock_snapshot=None, end_clock_snapshot=None | |
424 | ): | |
c946c9de | 425 | utils._check_type(stream, bt2_stream._Stream) |
0010c8b0 | 426 | |
c88be1c8 | 427 | if not stream.cls.supports_discarded_packets: |
77037b2b PP |
428 | raise ValueError('stream class does not support discarded packets') |
429 | ||
c88be1c8 | 430 | if stream.cls.discarded_packets_have_default_clock_snapshots: |
77037b2b | 431 | if beg_clock_snapshot is None or end_clock_snapshot is None: |
61d96b89 FD |
432 | raise ValueError( |
433 | 'discarded packets have default clock snapshots for this stream class' | |
434 | ) | |
77037b2b | 435 | |
0010c8b0 SM |
436 | utils._check_uint64(beg_clock_snapshot) |
437 | utils._check_uint64(end_clock_snapshot) | |
438 | ptr = native_bt.message_discarded_packets_create_with_default_clock_snapshots( | |
61d96b89 FD |
439 | self._bt_ptr, stream._ptr, beg_clock_snapshot, end_clock_snapshot |
440 | ) | |
0010c8b0 | 441 | else: |
77037b2b | 442 | if beg_clock_snapshot is not None or end_clock_snapshot is not None: |
61d96b89 FD |
443 | raise ValueError( |
444 | 'discarded packets have no default clock snapshots for this stream class' | |
445 | ) | |
77037b2b | 446 | |
61d96b89 | 447 | ptr = native_bt.message_discarded_packets_create(self._bt_ptr, stream._ptr) |
0010c8b0 SM |
448 | |
449 | if ptr is None: | |
614743a5 | 450 | raise bt2._MemoryError('cannot discarded packets message object') |
0010c8b0 | 451 | |
c946c9de | 452 | msg = bt2_message._DiscardedPacketsMessage(ptr) |
0010c8b0 SM |
453 | |
454 | if count is not None: | |
455 | msg._count = count | |
456 | ||
457 | return msg |