Commit | Line | Data |
---|---|---|
0235b0db | 1 | # SPDX-License-Identifier: MIT |
81447b5b PP |
2 | # |
3 | # Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com> | |
81447b5b PP |
4 | |
5 | from bt2 import native_bt, object, utils | |
3fb99a22 | 6 | from bt2 import message as bt2_message |
81447b5b | 7 | import collections.abc |
3fb99a22 PP |
8 | from bt2 import stream as bt2_stream |
9 | from bt2 import event_class as bt2_event_class | |
10 | from bt2 import packet as bt2_packet | |
11 | from bt2 import port as bt2_port | |
12 | from bt2 import clock_class as bt2_clock_class | |
81447b5b PP |
13 | import bt2 |
14 | ||
15 | ||
5602ef81 | 16 | class _MessageIterator(collections.abc.Iterator): |
81447b5b | 17 | def __next__(self): |
811644b8 | 18 | raise NotImplementedError |
81447b5b PP |
19 | |
20 | ||
1975af3d | 21 | class _UserComponentInputPortMessageIterator(object._SharedObject, _MessageIterator): |
9dee90bd SM |
22 | @staticmethod |
23 | def _get_ref(ptr): | |
24 | native_bt.message_iterator_get_ref(ptr) | |
25 | ||
26 | @staticmethod | |
27 | def _put_ref(ptr): | |
28 | native_bt.message_iterator_put_ref(ptr) | |
1975af3d | 29 | |
2ae9f48c | 30 | def __init__(self, ptr): |
cfbd7cf3 FD |
31 | self._current_msgs = [] |
32 | self._at = 0 | |
33 | super().__init__(ptr) | |
811644b8 PP |
34 | |
35 | def __next__(self): | |
2ae9f48c | 36 | if len(self._current_msgs) == self._at: |
1975af3d SM |
37 | status, msgs = native_bt.bt2_self_component_port_input_get_msg_range( |
38 | self._ptr | |
39 | ) | |
cfbd7cf3 | 40 | utils._handle_func_status( |
f5567ea8 | 41 | status, "unexpected error: cannot advance the message iterator" |
cfbd7cf3 | 42 | ) |
2ae9f48c SM |
43 | self._current_msgs = msgs |
44 | self._at = 0 | |
45 | ||
46 | msg_ptr = self._current_msgs[self._at] | |
47 | self._at += 1 | |
48 | ||
3fb99a22 | 49 | return bt2_message._create_from_ptr(msg_ptr) |
81447b5b | 50 | |
f00b8d40 | 51 | def can_seek_beginning(self): |
9a2c8b8e | 52 | (status, res) = native_bt.message_iterator_can_seek_beginning(self._ptr) |
f2fb1b32 SM |
53 | utils._handle_func_status( |
54 | status, | |
f5567ea8 | 55 | "cannot check whether or not message iterator can seek its beginning", |
f2fb1b32 | 56 | ) |
f00b8d40 SM |
57 | return res != 0 |
58 | ||
59 | def seek_beginning(self): | |
b6909b73 | 60 | # Forget about buffered messages, they won't be valid after seeking. |
f00b8d40 SM |
61 | self._current_msgs.clear() |
62 | self._at = 0 | |
63 | ||
9a2c8b8e | 64 | status = native_bt.message_iterator_seek_beginning(self._ptr) |
f5567ea8 | 65 | utils._handle_func_status(status, "cannot seek message iterator beginning") |
f00b8d40 | 66 | |
c182d7dd SM |
67 | def can_seek_ns_from_origin(self, ns_from_origin): |
68 | utils._check_int64(ns_from_origin) | |
9a2c8b8e | 69 | (status, res) = native_bt.message_iterator_can_seek_ns_from_origin( |
c182d7dd SM |
70 | self._ptr, ns_from_origin |
71 | ) | |
72 | utils._handle_func_status( | |
73 | status, | |
f5567ea8 | 74 | "cannot check whether or not message iterator can seek given ns from origin", |
c182d7dd SM |
75 | ) |
76 | return res != 0 | |
77 | ||
78 | def seek_ns_from_origin(self, ns_from_origin): | |
79 | utils._check_int64(ns_from_origin) | |
80 | ||
81 | # Forget about buffered messages, they won't be valid after seeking. | |
82 | self._current_msgs.clear() | |
83 | self._at = 0 | |
84 | ||
9a2c8b8e | 85 | status = native_bt.message_iterator_seek_ns_from_origin( |
c182d7dd SM |
86 | self._ptr, ns_from_origin |
87 | ) | |
88 | utils._handle_func_status( | |
f5567ea8 | 89 | status, "message iterator cannot seek given ns from origin" |
c182d7dd SM |
90 | ) |
91 | ||
8d8b141d SM |
92 | @property |
93 | def can_seek_forward(self): | |
9a2c8b8e | 94 | return native_bt.message_iterator_can_seek_forward(self._ptr) |
8d8b141d SM |
95 | |
96 | ||
97 | class _MessageIteratorConfiguration: | |
98 | def __init__(self, ptr): | |
99 | self._ptr = ptr | |
100 | ||
101 | def can_seek_forward(self, value): | |
102 | utils._check_bool(value) | |
103 | native_bt.self_message_iterator_configuration_set_can_seek_forward( | |
104 | self._ptr, value | |
105 | ) | |
106 | ||
107 | can_seek_forward = property(fset=can_seek_forward) | |
108 | ||
811644b8 | 109 | |
c5f330cd SM |
110 | # This is extended by the user to implement component classes in Python. It |
111 | # is created for a given output port when an input port message iterator is | |
7a2d4e2d | 112 | # created on the input port on the other side of the connection. |
c5f330cd SM |
113 | # |
114 | # Its purpose is to feed the messages that should go out through this output | |
115 | # port. | |
5602ef81 | 116 | class _UserMessageIterator(_MessageIterator): |
81447b5b | 117 | def __new__(cls, ptr): |
811644b8 | 118 | # User iterator objects are always created by the native side, |
81447b5b PP |
119 | # that is, never instantiated directly by Python code. |
120 | # | |
811644b8 PP |
121 | # The native code calls this, then manually calls |
122 | # self.__init__() without the `ptr` argument. The user has | |
123 | # access to self.component during this call, thanks to this | |
85906b6b | 124 | # self._bt_ptr argument being set. |
81447b5b | 125 | # |
85906b6b | 126 | # self._bt_ptr is NOT owned by this object here, so there's nothing |
81447b5b PP |
127 | # to do in __del__(). |
128 | self = super().__new__(cls) | |
85906b6b | 129 | self._bt_ptr = ptr |
81447b5b PP |
130 | return self |
131 | ||
8d8b141d | 132 | def _bt_init_from_native(self, config_ptr, self_output_port_ptr): |
3fb99a22 | 133 | self_output_port = bt2_port._create_self_from_ptr_and_get_ref( |
cfbd7cf3 FD |
134 | self_output_port_ptr, native_bt.PORT_TYPE_OUTPUT |
135 | ) | |
8d8b141d SM |
136 | config = _MessageIteratorConfiguration(config_ptr) |
137 | self.__init__(config, self_output_port) | |
c5f330cd | 138 | |
8d8b141d | 139 | def __init__(self, config, self_output_port): |
81447b5b PP |
140 | pass |
141 | ||
142 | @property | |
811644b8 | 143 | def _component(self): |
85906b6b | 144 | return native_bt.bt2_get_user_component_from_user_msg_iter(self._bt_ptr) |
81447b5b | 145 | |
14503fb1 SM |
146 | @property |
147 | def _port(self): | |
148 | port_ptr = native_bt.self_message_iterator_borrow_port(self._bt_ptr) | |
149 | assert port_ptr is not None | |
150 | return bt2_port._create_self_from_ptr_and_get_ref( | |
151 | port_ptr, native_bt.PORT_TYPE_OUTPUT | |
152 | ) | |
153 | ||
81447b5b PP |
154 | @property |
155 | def addr(self): | |
85906b6b | 156 | return int(self._bt_ptr) |
81447b5b | 157 | |
9b4f9b42 PP |
158 | @property |
159 | def _is_interrupted(self): | |
160 | return bool(native_bt.self_message_iterator_is_interrupted(self._bt_ptr)) | |
161 | ||
6a91742b | 162 | def _user_finalize(self): |
81447b5b PP |
163 | pass |
164 | ||
811644b8 PP |
165 | def __next__(self): |
166 | raise bt2.Stop | |
167 | ||
85906b6b | 168 | def _bt_next_from_native(self): |
811644b8 PP |
169 | # this can raise anything: it's catched by the native part |
170 | try: | |
5602ef81 | 171 | msg = next(self) |
811644b8 PP |
172 | except StopIteration: |
173 | raise bt2.Stop | |
4c4935bf | 174 | except Exception: |
811644b8 PP |
175 | raise |
176 | ||
f0a42b33 | 177 | utils._check_type(msg, bt2_message._MessageConst) |
81447b5b | 178 | |
d79a8353 SM |
179 | # The reference we return will be given to the message array. |
180 | # However, the `msg` Python object may stay alive, if the user has kept | |
181 | # a reference to it. Acquire a new reference to account for that. | |
182 | msg._get_ref(msg._ptr) | |
183 | return int(msg._ptr) | |
2ae9f48c | 184 | |
85906b6b | 185 | def _bt_can_seek_beginning_from_native(self): |
f00b8d40 SM |
186 | # Here, we mimic the behavior of the C API: |
187 | # | |
14cfc8ce | 188 | # - If the iterator has a _user_can_seek_beginning method, |
6a91742b | 189 | # read it and use that result. |
5a096c63 | 190 | # - Otherwise, the presence or absence of a `_user_seek_beginning` |
f00b8d40 | 191 | # method indicates whether the iterator can seek beginning. |
f5567ea8 | 192 | if hasattr(self, "_user_can_seek_beginning"): |
14cfc8ce | 193 | can_seek_beginning = self._user_can_seek_beginning() |
f00b8d40 SM |
194 | utils._check_bool(can_seek_beginning) |
195 | return can_seek_beginning | |
196 | else: | |
f5567ea8 | 197 | return hasattr(self, "_user_seek_beginning") |
f00b8d40 | 198 | |
85906b6b | 199 | def _bt_seek_beginning_from_native(self): |
6a91742b | 200 | self._user_seek_beginning() |
f00b8d40 | 201 | |
c182d7dd | 202 | def _bt_can_seek_ns_from_origin_from_native(self, ns_from_origin): |
c0e46a7c SM |
203 | # Return whether the iterator can seek ns from origin using the |
204 | # user-implemented seek_ns_from_origin method. We mimic the behavior | |
205 | # of the C API: | |
c182d7dd SM |
206 | # |
207 | # - If the iterator has a _user_can_seek_ns_from_origin method, | |
208 | # call it and use its return value. | |
209 | # - Otherwise, if there is a `_user_seek_ns_from_origin` method, | |
210 | # we presume it's possible. | |
c0e46a7c | 211 | |
f5567ea8 | 212 | if hasattr(self, "_user_can_seek_ns_from_origin"): |
c182d7dd SM |
213 | can_seek_ns_from_origin = self._user_can_seek_ns_from_origin(ns_from_origin) |
214 | utils._check_bool(can_seek_ns_from_origin) | |
215 | return can_seek_ns_from_origin | |
c182d7dd | 216 | else: |
f5567ea8 | 217 | return hasattr(self, "_user_seek_ns_from_origin") |
c182d7dd SM |
218 | |
219 | def _bt_seek_ns_from_origin_from_native(self, ns_from_origin): | |
220 | self._user_seek_ns_from_origin(ns_from_origin) | |
221 | ||
9a2c8b8e | 222 | def _create_message_iterator(self, input_port): |
3fb99a22 | 223 | utils._check_type(input_port, bt2_port._UserComponentInputPort) |
ca02df0a | 224 | |
415d43a1 | 225 | if not input_port.is_connected: |
f5567ea8 | 226 | raise ValueError("input port is not connected") |
415d43a1 | 227 | |
75882e97 FD |
228 | ( |
229 | status, | |
230 | msg_iter_ptr, | |
9a2c8b8e | 231 | ) = native_bt.bt2_message_iterator_create_from_message_iterator( |
ca02df0a PP |
232 | self._bt_ptr, input_port._ptr |
233 | ) | |
f5567ea8 | 234 | utils._handle_func_status(status, "cannot create message iterator object") |
e803df70 | 235 | assert msg_iter_ptr is not None |
ca02df0a PP |
236 | |
237 | return _UserComponentInputPortMessageIterator(msg_iter_ptr) | |
238 | ||
36d9460d | 239 | def _create_event_message(self, event_class, parent, default_clock_snapshot=None): |
3fb99a22 | 240 | utils._check_type(event_class, bt2_event_class._EventClass) |
26fc5aed PP |
241 | |
242 | if event_class.stream_class.supports_packets: | |
3fb99a22 | 243 | utils._check_type(parent, bt2_packet._Packet) |
26fc5aed | 244 | else: |
3fb99a22 | 245 | utils._check_type(parent, bt2_stream._Stream) |
2ae9f48c SM |
246 | |
247 | if default_clock_snapshot is not None: | |
c6af194f | 248 | if event_class.stream_class.default_clock_class is None: |
cfbd7cf3 | 249 | raise ValueError( |
f5567ea8 | 250 | "event messages in this stream must not have a default clock snapshot" |
cfbd7cf3 | 251 | ) |
c6af194f | 252 | |
2ae9f48c | 253 | utils._check_uint64(default_clock_snapshot) |
26fc5aed PP |
254 | |
255 | if event_class.stream_class.supports_packets: | |
256 | ptr = native_bt.message_event_create_with_packet_and_default_clock_snapshot( | |
cfbd7cf3 FD |
257 | self._bt_ptr, event_class._ptr, parent._ptr, default_clock_snapshot |
258 | ) | |
26fc5aed PP |
259 | else: |
260 | ptr = native_bt.message_event_create_with_default_clock_snapshot( | |
cfbd7cf3 FD |
261 | self._bt_ptr, event_class._ptr, parent._ptr, default_clock_snapshot |
262 | ) | |
2ae9f48c | 263 | else: |
c6af194f | 264 | if event_class.stream_class.default_clock_class is not None: |
cfbd7cf3 | 265 | raise ValueError( |
f5567ea8 | 266 | "event messages in this stream must have a default clock snapshot" |
cfbd7cf3 | 267 | ) |
c6af194f | 268 | |
26fc5aed PP |
269 | if event_class.stream_class.supports_packets: |
270 | ptr = native_bt.message_event_create_with_packet( | |
cfbd7cf3 FD |
271 | self._bt_ptr, event_class._ptr, parent._ptr |
272 | ) | |
26fc5aed PP |
273 | else: |
274 | ptr = native_bt.message_event_create( | |
cfbd7cf3 FD |
275 | self._bt_ptr, event_class._ptr, parent._ptr |
276 | ) | |
2ae9f48c SM |
277 | |
278 | if ptr is None: | |
f5567ea8 | 279 | raise bt2._MemoryError("cannot create event message object") |
2ae9f48c | 280 | |
3fb99a22 | 281 | return bt2_message._EventMessage(ptr) |
2ae9f48c | 282 | |
9ec609ec | 283 | def _create_message_iterator_inactivity_message(self, clock_class, clock_snapshot): |
3fb99a22 | 284 | utils._check_type(clock_class, bt2_clock_class._ClockClass) |
9ec609ec | 285 | ptr = native_bt.message_message_iterator_inactivity_create( |
cfbd7cf3 FD |
286 | self._bt_ptr, clock_class._ptr, clock_snapshot |
287 | ) | |
9ec609ec SM |
288 | |
289 | if ptr is None: | |
f5567ea8 | 290 | raise bt2._MemoryError("cannot create inactivity message object") |
9ec609ec | 291 | |
3fb99a22 | 292 | return bt2_message._MessageIteratorInactivityMessage(ptr) |
9ec609ec | 293 | |
188edac1 | 294 | def _create_stream_beginning_message(self, stream, default_clock_snapshot=None): |
3fb99a22 | 295 | utils._check_type(stream, bt2_stream._Stream) |
2ae9f48c | 296 | |
85906b6b | 297 | ptr = native_bt.message_stream_beginning_create(self._bt_ptr, stream._ptr) |
2ae9f48c | 298 | if ptr is None: |
f5567ea8 | 299 | raise bt2._MemoryError("cannot create stream beginning message object") |
2ae9f48c | 300 | |
3fb99a22 | 301 | msg = bt2_message._StreamBeginningMessage(ptr) |
9ec609ec | 302 | |
188edac1 SM |
303 | if default_clock_snapshot is not None: |
304 | msg._default_clock_snapshot = default_clock_snapshot | |
9ec609ec | 305 | |
9ec609ec SM |
306 | return msg |
307 | ||
188edac1 | 308 | def _create_stream_end_message(self, stream, default_clock_snapshot=None): |
3fb99a22 | 309 | utils._check_type(stream, bt2_stream._Stream) |
5f25509b | 310 | |
85906b6b | 311 | ptr = native_bt.message_stream_end_create(self._bt_ptr, stream._ptr) |
5f25509b | 312 | if ptr is None: |
f5567ea8 | 313 | raise bt2._MemoryError("cannot create stream end message object") |
5f25509b | 314 | |
3fb99a22 | 315 | msg = bt2_message._StreamEndMessage(ptr) |
188edac1 SM |
316 | |
317 | if default_clock_snapshot is not None: | |
318 | msg._default_clock_snapshot = default_clock_snapshot | |
319 | ||
320 | return msg | |
5f25509b | 321 | |
2ae9f48c | 322 | def _create_packet_beginning_message(self, packet, default_clock_snapshot=None): |
3fb99a22 | 323 | utils._check_type(packet, bt2_packet._Packet) |
2ae9f48c | 324 | |
e8ac1aae | 325 | if packet.stream.cls.packets_have_beginning_default_clock_snapshot: |
2ae9f48c | 326 | if default_clock_snapshot is None: |
cfbd7cf3 FD |
327 | raise ValueError( |
328 | "packet beginning messages in this stream must have a default clock snapshot" | |
329 | ) | |
2ae9f48c SM |
330 | |
331 | utils._check_uint64(default_clock_snapshot) | |
332 | ptr = native_bt.message_packet_beginning_create_with_default_clock_snapshot( | |
cfbd7cf3 FD |
333 | self._bt_ptr, packet._ptr, default_clock_snapshot |
334 | ) | |
2ae9f48c SM |
335 | else: |
336 | if default_clock_snapshot is not None: | |
cfbd7cf3 FD |
337 | raise ValueError( |
338 | "packet beginning messages in this stream must not have a default clock snapshot" | |
339 | ) | |
2ae9f48c | 340 | |
85906b6b | 341 | ptr = native_bt.message_packet_beginning_create(self._bt_ptr, packet._ptr) |
2ae9f48c SM |
342 | |
343 | if ptr is None: | |
f5567ea8 | 344 | raise bt2._MemoryError("cannot create packet beginning message object") |
2ae9f48c | 345 | |
3fb99a22 | 346 | return bt2_message._PacketBeginningMessage(ptr) |
5f25509b SM |
347 | |
348 | def _create_packet_end_message(self, packet, default_clock_snapshot=None): | |
3fb99a22 | 349 | utils._check_type(packet, bt2_packet._Packet) |
5f25509b | 350 | |
e8ac1aae | 351 | if packet.stream.cls.packets_have_end_default_clock_snapshot: |
9ec609ec | 352 | if default_clock_snapshot is None: |
cfbd7cf3 FD |
353 | raise ValueError( |
354 | "packet end messages in this stream must have a default clock snapshot" | |
355 | ) | |
9ec609ec | 356 | |
5f25509b SM |
357 | utils._check_uint64(default_clock_snapshot) |
358 | ptr = native_bt.message_packet_end_create_with_default_clock_snapshot( | |
cfbd7cf3 FD |
359 | self._bt_ptr, packet._ptr, default_clock_snapshot |
360 | ) | |
5f25509b | 361 | else: |
9ec609ec | 362 | if default_clock_snapshot is not None: |
cfbd7cf3 FD |
363 | raise ValueError( |
364 | "packet end messages in this stream must not have a default clock snapshot" | |
365 | ) | |
9ec609ec | 366 | |
85906b6b | 367 | ptr = native_bt.message_packet_end_create(self._bt_ptr, packet._ptr) |
5f25509b SM |
368 | |
369 | if ptr is None: | |
f5567ea8 | 370 | raise bt2._MemoryError("cannot create packet end message object") |
5f25509b | 371 | |
3fb99a22 | 372 | return bt2_message._PacketEndMessage(ptr) |
9ec609ec | 373 | |
cfbd7cf3 FD |
374 | def _create_discarded_events_message( |
375 | self, stream, count=None, beg_clock_snapshot=None, end_clock_snapshot=None | |
376 | ): | |
3fb99a22 | 377 | utils._check_type(stream, bt2_stream._Stream) |
9ec609ec | 378 | |
e8ac1aae | 379 | if not stream.cls.supports_discarded_events: |
f5567ea8 | 380 | raise ValueError("stream class does not support discarded events") |
2e90378a | 381 | |
e8ac1aae | 382 | if stream.cls.discarded_events_have_default_clock_snapshots: |
2e90378a | 383 | if beg_clock_snapshot is None or end_clock_snapshot is None: |
cfbd7cf3 | 384 | raise ValueError( |
f5567ea8 | 385 | "discarded events have default clock snapshots for this stream class" |
cfbd7cf3 | 386 | ) |
2e90378a | 387 | |
9ec609ec SM |
388 | utils._check_uint64(beg_clock_snapshot) |
389 | utils._check_uint64(end_clock_snapshot) | |
5d9ef4cb SM |
390 | |
391 | if beg_clock_snapshot > end_clock_snapshot: | |
392 | raise ValueError( | |
f5567ea8 | 393 | "beginning default clock snapshot value ({}) is greater than end default clock snapshot value ({})".format( |
5d9ef4cb SM |
394 | beg_clock_snapshot, end_clock_snapshot |
395 | ) | |
396 | ) | |
397 | ||
776a2a25 PP |
398 | ptr = ( |
399 | native_bt.message_discarded_events_create_with_default_clock_snapshots( | |
400 | self._bt_ptr, stream._ptr, beg_clock_snapshot, end_clock_snapshot | |
401 | ) | |
cfbd7cf3 | 402 | ) |
9ec609ec | 403 | else: |
2e90378a | 404 | if beg_clock_snapshot is not None or end_clock_snapshot is not None: |
cfbd7cf3 | 405 | raise ValueError( |
f5567ea8 | 406 | "discarded events have no default clock snapshots for this stream class" |
cfbd7cf3 | 407 | ) |
2e90378a | 408 | |
cfbd7cf3 | 409 | ptr = native_bt.message_discarded_events_create(self._bt_ptr, stream._ptr) |
9ec609ec SM |
410 | |
411 | if ptr is None: | |
f5567ea8 | 412 | raise bt2._MemoryError("cannot discarded events message object") |
9ec609ec | 413 | |
3fb99a22 | 414 | msg = bt2_message._DiscardedEventsMessage(ptr) |
9ec609ec SM |
415 | |
416 | if count is not None: | |
417 | msg._count = count | |
418 | ||
419 | return msg | |
420 | ||
cfbd7cf3 FD |
421 | def _create_discarded_packets_message( |
422 | self, stream, count=None, beg_clock_snapshot=None, end_clock_snapshot=None | |
423 | ): | |
3fb99a22 | 424 | utils._check_type(stream, bt2_stream._Stream) |
9ec609ec | 425 | |
e8ac1aae | 426 | if not stream.cls.supports_discarded_packets: |
f5567ea8 | 427 | raise ValueError("stream class does not support discarded packets") |
2e90378a | 428 | |
e8ac1aae | 429 | if stream.cls.discarded_packets_have_default_clock_snapshots: |
2e90378a | 430 | if beg_clock_snapshot is None or end_clock_snapshot is None: |
cfbd7cf3 | 431 | raise ValueError( |
f5567ea8 | 432 | "discarded packets have default clock snapshots for this stream class" |
cfbd7cf3 | 433 | ) |
2e90378a | 434 | |
9ec609ec SM |
435 | utils._check_uint64(beg_clock_snapshot) |
436 | utils._check_uint64(end_clock_snapshot) | |
5d9ef4cb SM |
437 | |
438 | if beg_clock_snapshot > end_clock_snapshot: | |
439 | raise ValueError( | |
f5567ea8 | 440 | "beginning default clock snapshot value ({}) is greater than end default clock snapshot value ({})".format( |
5d9ef4cb SM |
441 | beg_clock_snapshot, end_clock_snapshot |
442 | ) | |
443 | ) | |
444 | ||
776a2a25 PP |
445 | ptr = ( |
446 | native_bt.message_discarded_packets_create_with_default_clock_snapshots( | |
447 | self._bt_ptr, stream._ptr, beg_clock_snapshot, end_clock_snapshot | |
448 | ) | |
cfbd7cf3 | 449 | ) |
9ec609ec | 450 | else: |
2e90378a | 451 | if beg_clock_snapshot is not None or end_clock_snapshot is not None: |
cfbd7cf3 | 452 | raise ValueError( |
f5567ea8 | 453 | "discarded packets have no default clock snapshots for this stream class" |
cfbd7cf3 | 454 | ) |
2e90378a | 455 | |
cfbd7cf3 | 456 | ptr = native_bt.message_discarded_packets_create(self._bt_ptr, stream._ptr) |
9ec609ec SM |
457 | |
458 | if ptr is None: | |
f5567ea8 | 459 | raise bt2._MemoryError("cannot discarded packets message object") |
9ec609ec | 460 | |
3fb99a22 | 461 | msg = bt2_message._DiscardedPacketsMessage(ptr) |
9ec609ec SM |
462 | |
463 | if count is not None: | |
464 | msg._count = count | |
465 | ||
466 | return msg |