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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 | |
3fb99a22 | 24 | from bt2 import message as bt2_message |
81447b5b | 25 | import collections.abc |
3fb99a22 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 | ||
5602ef81 | 34 | class _MessageIterator(collections.abc.Iterator): |
81447b5b | 35 | def __next__(self): |
811644b8 | 36 | raise NotImplementedError |
81447b5b PP |
37 | |
38 | ||
78288f58 | 39 | class _GenericMessageIterator(object._SharedObject, _MessageIterator): |
2ae9f48c | 40 | def __init__(self, ptr): |
cfbd7cf3 FD |
41 | self._current_msgs = [] |
42 | self._at = 0 | |
43 | super().__init__(ptr) | |
811644b8 PP |
44 | |
45 | def __next__(self): | |
2ae9f48c SM |
46 | if len(self._current_msgs) == self._at: |
47 | status, msgs = self._get_msg_range(self._ptr) | |
cfbd7cf3 FD |
48 | utils._handle_func_status( |
49 | status, 'unexpected error: cannot advance the message iterator' | |
50 | ) | |
2ae9f48c SM |
51 | self._current_msgs = msgs |
52 | self._at = 0 | |
53 | ||
54 | msg_ptr = self._current_msgs[self._at] | |
55 | self._at += 1 | |
56 | ||
3fb99a22 | 57 | return bt2_message._create_from_ptr(msg_ptr) |
81447b5b | 58 | |
f00b8d40 SM |
59 | @property |
60 | def can_seek_beginning(self): | |
61 | res = self._can_seek_beginning(self._ptr) | |
62 | return res != 0 | |
63 | ||
64 | def seek_beginning(self): | |
b6909b73 | 65 | # Forget about buffered messages, they won't be valid after seeking. |
f00b8d40 SM |
66 | self._current_msgs.clear() |
67 | self._at = 0 | |
68 | ||
69 | status = self._seek_beginning(self._ptr) | |
cfbd7cf3 | 70 | utils._handle_func_status(status, 'cannot seek message iterator beginning') |
f00b8d40 | 71 | |
811644b8 | 72 | |
c5f330cd | 73 | # This is created when a component wants to iterate on one of its input ports. |
5f25509b | 74 | class _UserComponentInputPortMessageIterator(_GenericMessageIterator): |
d24d5663 | 75 | _get_msg_range = staticmethod(native_bt.bt2_self_component_port_input_get_msg_range) |
cfbd7cf3 FD |
76 | _get_ref = staticmethod( |
77 | native_bt.self_component_port_input_message_iterator_get_ref | |
78 | ) | |
79 | _put_ref = staticmethod( | |
80 | native_bt.self_component_port_input_message_iterator_put_ref | |
81 | ) | |
82 | _can_seek_beginning = staticmethod( | |
83 | native_bt.self_component_port_input_message_iterator_can_seek_beginning | |
84 | ) | |
85 | _seek_beginning = staticmethod( | |
86 | native_bt.self_component_port_input_message_iterator_seek_beginning | |
87 | ) | |
90157d89 PP |
88 | |
89 | ||
c5f330cd SM |
90 | # This is extended by the user to implement component classes in Python. It |
91 | # is created for a given output port when an input port message iterator is | |
92 | # created on the input port on the other side of the connection. It is also | |
93 | # created when an output port message iterator is created on this output port. | |
94 | # | |
95 | # Its purpose is to feed the messages that should go out through this output | |
96 | # port. | |
5602ef81 | 97 | class _UserMessageIterator(_MessageIterator): |
81447b5b | 98 | def __new__(cls, ptr): |
811644b8 | 99 | # User iterator objects are always created by the native side, |
81447b5b PP |
100 | # that is, never instantiated directly by Python code. |
101 | # | |
811644b8 PP |
102 | # The native code calls this, then manually calls |
103 | # self.__init__() without the `ptr` argument. The user has | |
104 | # access to self.component during this call, thanks to this | |
85906b6b | 105 | # self._bt_ptr argument being set. |
81447b5b | 106 | # |
85906b6b | 107 | # self._bt_ptr is NOT owned by this object here, so there's nothing |
81447b5b PP |
108 | # to do in __del__(). |
109 | self = super().__new__(cls) | |
85906b6b | 110 | self._bt_ptr = ptr |
81447b5b PP |
111 | return self |
112 | ||
85906b6b | 113 | def _bt_init_from_native(self, self_output_port_ptr): |
3fb99a22 | 114 | self_output_port = bt2_port._create_self_from_ptr_and_get_ref( |
cfbd7cf3 FD |
115 | self_output_port_ptr, native_bt.PORT_TYPE_OUTPUT |
116 | ) | |
c5f330cd SM |
117 | self.__init__(self_output_port) |
118 | ||
119 | def __init__(self, output_port): | |
81447b5b PP |
120 | pass |
121 | ||
122 | @property | |
811644b8 | 123 | def _component(self): |
85906b6b | 124 | return native_bt.bt2_get_user_component_from_user_msg_iter(self._bt_ptr) |
81447b5b PP |
125 | |
126 | @property | |
127 | def addr(self): | |
85906b6b | 128 | return int(self._bt_ptr) |
81447b5b | 129 | |
9b4f9b42 PP |
130 | @property |
131 | def _is_interrupted(self): | |
132 | return bool(native_bt.self_message_iterator_is_interrupted(self._bt_ptr)) | |
133 | ||
6a91742b | 134 | def _user_finalize(self): |
81447b5b PP |
135 | pass |
136 | ||
811644b8 PP |
137 | def __next__(self): |
138 | raise bt2.Stop | |
139 | ||
85906b6b | 140 | def _bt_next_from_native(self): |
811644b8 PP |
141 | # this can raise anything: it's catched by the native part |
142 | try: | |
5602ef81 | 143 | msg = next(self) |
811644b8 PP |
144 | except StopIteration: |
145 | raise bt2.Stop | |
4c4935bf | 146 | except Exception: |
811644b8 PP |
147 | raise |
148 | ||
3fb99a22 | 149 | utils._check_type(msg, bt2_message._Message) |
81447b5b | 150 | |
d79a8353 SM |
151 | # The reference we return will be given to the message array. |
152 | # However, the `msg` Python object may stay alive, if the user has kept | |
153 | # a reference to it. Acquire a new reference to account for that. | |
154 | msg._get_ref(msg._ptr) | |
155 | return int(msg._ptr) | |
2ae9f48c | 156 | |
f00b8d40 | 157 | @property |
85906b6b | 158 | def _bt_can_seek_beginning_from_native(self): |
f00b8d40 SM |
159 | # Here, we mimic the behavior of the C API: |
160 | # | |
6a91742b PP |
161 | # - If the iterator has a _user_can_seek_beginning attribute, |
162 | # read it and use that result. | |
5a096c63 | 163 | # - Otherwise, the presence or absence of a `_user_seek_beginning` |
f00b8d40 | 164 | # method indicates whether the iterator can seek beginning. |
6a91742b PP |
165 | if hasattr(self, '_user_can_seek_beginning'): |
166 | can_seek_beginning = self._user_can_seek_beginning | |
f00b8d40 SM |
167 | utils._check_bool(can_seek_beginning) |
168 | return can_seek_beginning | |
169 | else: | |
6a91742b | 170 | return hasattr(self, '_user_seek_beginning') |
f00b8d40 | 171 | |
85906b6b | 172 | def _bt_seek_beginning_from_native(self): |
6a91742b | 173 | self._user_seek_beginning() |
f00b8d40 | 174 | |
ca02df0a | 175 | def _create_input_port_message_iterator(self, input_port): |
3fb99a22 | 176 | utils._check_type(input_port, bt2_port._UserComponentInputPort) |
ca02df0a | 177 | |
e803df70 | 178 | status, msg_iter_ptr = native_bt.bt2_self_component_port_input_message_iterator_create_from_message_iterator( |
ca02df0a PP |
179 | self._bt_ptr, input_port._ptr |
180 | ) | |
e803df70 SM |
181 | utils._handle_func_status(status, 'cannot create message iterator object') |
182 | assert msg_iter_ptr is not None | |
ca02df0a PP |
183 | |
184 | return _UserComponentInputPortMessageIterator(msg_iter_ptr) | |
185 | ||
36d9460d | 186 | def _create_event_message(self, event_class, parent, default_clock_snapshot=None): |
3fb99a22 | 187 | utils._check_type(event_class, bt2_event_class._EventClass) |
26fc5aed PP |
188 | |
189 | if event_class.stream_class.supports_packets: | |
3fb99a22 | 190 | utils._check_type(parent, bt2_packet._Packet) |
26fc5aed | 191 | else: |
3fb99a22 | 192 | utils._check_type(parent, bt2_stream._Stream) |
2ae9f48c SM |
193 | |
194 | if default_clock_snapshot is not None: | |
c6af194f | 195 | if event_class.stream_class.default_clock_class is None: |
cfbd7cf3 FD |
196 | raise ValueError( |
197 | 'event messages in this stream must not have a default clock snapshot' | |
198 | ) | |
c6af194f | 199 | |
2ae9f48c | 200 | utils._check_uint64(default_clock_snapshot) |
26fc5aed PP |
201 | |
202 | if event_class.stream_class.supports_packets: | |
203 | ptr = native_bt.message_event_create_with_packet_and_default_clock_snapshot( | |
cfbd7cf3 FD |
204 | self._bt_ptr, event_class._ptr, parent._ptr, default_clock_snapshot |
205 | ) | |
26fc5aed PP |
206 | else: |
207 | ptr = native_bt.message_event_create_with_default_clock_snapshot( | |
cfbd7cf3 FD |
208 | self._bt_ptr, event_class._ptr, parent._ptr, default_clock_snapshot |
209 | ) | |
2ae9f48c | 210 | else: |
c6af194f | 211 | if event_class.stream_class.default_clock_class is not None: |
cfbd7cf3 FD |
212 | raise ValueError( |
213 | 'event messages in this stream must have a default clock snapshot' | |
214 | ) | |
c6af194f | 215 | |
26fc5aed PP |
216 | if event_class.stream_class.supports_packets: |
217 | ptr = native_bt.message_event_create_with_packet( | |
cfbd7cf3 FD |
218 | self._bt_ptr, event_class._ptr, parent._ptr |
219 | ) | |
26fc5aed PP |
220 | else: |
221 | ptr = native_bt.message_event_create( | |
cfbd7cf3 FD |
222 | self._bt_ptr, event_class._ptr, parent._ptr |
223 | ) | |
2ae9f48c SM |
224 | |
225 | if ptr is None: | |
694c792b | 226 | raise bt2._MemoryError('cannot create event message object') |
2ae9f48c | 227 | |
3fb99a22 | 228 | return bt2_message._EventMessage(ptr) |
2ae9f48c | 229 | |
9ec609ec | 230 | def _create_message_iterator_inactivity_message(self, clock_class, clock_snapshot): |
3fb99a22 | 231 | utils._check_type(clock_class, bt2_clock_class._ClockClass) |
9ec609ec | 232 | ptr = native_bt.message_message_iterator_inactivity_create( |
cfbd7cf3 FD |
233 | self._bt_ptr, clock_class._ptr, clock_snapshot |
234 | ) | |
9ec609ec SM |
235 | |
236 | if ptr is None: | |
694c792b | 237 | raise bt2._MemoryError('cannot create inactivity message object') |
9ec609ec | 238 | |
3fb99a22 | 239 | return bt2_message._MessageIteratorInactivityMessage(ptr) |
9ec609ec | 240 | |
188edac1 | 241 | def _create_stream_beginning_message(self, stream, default_clock_snapshot=None): |
3fb99a22 | 242 | utils._check_type(stream, bt2_stream._Stream) |
2ae9f48c | 243 | |
85906b6b | 244 | ptr = native_bt.message_stream_beginning_create(self._bt_ptr, stream._ptr) |
2ae9f48c | 245 | if ptr is None: |
694c792b | 246 | raise bt2._MemoryError('cannot create stream beginning message object') |
2ae9f48c | 247 | |
3fb99a22 | 248 | msg = bt2_message._StreamBeginningMessage(ptr) |
9ec609ec | 249 | |
188edac1 SM |
250 | if default_clock_snapshot is not None: |
251 | msg._default_clock_snapshot = default_clock_snapshot | |
9ec609ec | 252 | |
9ec609ec SM |
253 | return msg |
254 | ||
188edac1 | 255 | def _create_stream_end_message(self, stream, default_clock_snapshot=None): |
3fb99a22 | 256 | utils._check_type(stream, bt2_stream._Stream) |
5f25509b | 257 | |
85906b6b | 258 | ptr = native_bt.message_stream_end_create(self._bt_ptr, stream._ptr) |
5f25509b | 259 | if ptr is None: |
694c792b | 260 | raise bt2._MemoryError('cannot create stream end message object') |
5f25509b | 261 | |
3fb99a22 | 262 | msg = bt2_message._StreamEndMessage(ptr) |
188edac1 SM |
263 | |
264 | if default_clock_snapshot is not None: | |
265 | msg._default_clock_snapshot = default_clock_snapshot | |
266 | ||
267 | return msg | |
5f25509b | 268 | |
2ae9f48c | 269 | def _create_packet_beginning_message(self, packet, default_clock_snapshot=None): |
3fb99a22 | 270 | utils._check_type(packet, bt2_packet._Packet) |
2ae9f48c | 271 | |
e8ac1aae | 272 | if packet.stream.cls.packets_have_beginning_default_clock_snapshot: |
2ae9f48c | 273 | if default_clock_snapshot is None: |
cfbd7cf3 FD |
274 | raise ValueError( |
275 | "packet beginning messages in this stream must have a default clock snapshot" | |
276 | ) | |
2ae9f48c SM |
277 | |
278 | utils._check_uint64(default_clock_snapshot) | |
279 | ptr = native_bt.message_packet_beginning_create_with_default_clock_snapshot( | |
cfbd7cf3 FD |
280 | self._bt_ptr, packet._ptr, default_clock_snapshot |
281 | ) | |
2ae9f48c SM |
282 | else: |
283 | if default_clock_snapshot is not None: | |
cfbd7cf3 FD |
284 | raise ValueError( |
285 | "packet beginning messages in this stream must not have a default clock snapshot" | |
286 | ) | |
2ae9f48c | 287 | |
85906b6b | 288 | ptr = native_bt.message_packet_beginning_create(self._bt_ptr, packet._ptr) |
2ae9f48c SM |
289 | |
290 | if ptr is None: | |
694c792b | 291 | raise bt2._MemoryError('cannot create packet beginning message object') |
2ae9f48c | 292 | |
3fb99a22 | 293 | return bt2_message._PacketBeginningMessage(ptr) |
5f25509b SM |
294 | |
295 | def _create_packet_end_message(self, packet, default_clock_snapshot=None): | |
3fb99a22 | 296 | utils._check_type(packet, bt2_packet._Packet) |
5f25509b | 297 | |
e8ac1aae | 298 | if packet.stream.cls.packets_have_end_default_clock_snapshot: |
9ec609ec | 299 | if default_clock_snapshot is None: |
cfbd7cf3 FD |
300 | raise ValueError( |
301 | "packet end messages in this stream must have a default clock snapshot" | |
302 | ) | |
9ec609ec | 303 | |
5f25509b SM |
304 | utils._check_uint64(default_clock_snapshot) |
305 | ptr = native_bt.message_packet_end_create_with_default_clock_snapshot( | |
cfbd7cf3 FD |
306 | self._bt_ptr, packet._ptr, default_clock_snapshot |
307 | ) | |
5f25509b | 308 | else: |
9ec609ec | 309 | if default_clock_snapshot is not None: |
cfbd7cf3 FD |
310 | raise ValueError( |
311 | "packet end messages in this stream must not have a default clock snapshot" | |
312 | ) | |
9ec609ec | 313 | |
85906b6b | 314 | ptr = native_bt.message_packet_end_create(self._bt_ptr, packet._ptr) |
5f25509b SM |
315 | |
316 | if ptr is None: | |
694c792b | 317 | raise bt2._MemoryError('cannot create packet end message object') |
5f25509b | 318 | |
3fb99a22 | 319 | return bt2_message._PacketEndMessage(ptr) |
9ec609ec | 320 | |
cfbd7cf3 FD |
321 | def _create_discarded_events_message( |
322 | self, stream, count=None, beg_clock_snapshot=None, end_clock_snapshot=None | |
323 | ): | |
3fb99a22 | 324 | utils._check_type(stream, bt2_stream._Stream) |
9ec609ec | 325 | |
e8ac1aae | 326 | if not stream.cls.supports_discarded_events: |
2e90378a PP |
327 | raise ValueError('stream class does not support discarded events') |
328 | ||
e8ac1aae | 329 | if stream.cls.discarded_events_have_default_clock_snapshots: |
2e90378a | 330 | if beg_clock_snapshot is None or end_clock_snapshot is None: |
cfbd7cf3 FD |
331 | raise ValueError( |
332 | 'discarded events have default clock snapshots for this stream class' | |
333 | ) | |
2e90378a | 334 | |
9ec609ec SM |
335 | utils._check_uint64(beg_clock_snapshot) |
336 | utils._check_uint64(end_clock_snapshot) | |
337 | ptr = native_bt.message_discarded_events_create_with_default_clock_snapshots( | |
cfbd7cf3 FD |
338 | self._bt_ptr, stream._ptr, beg_clock_snapshot, end_clock_snapshot |
339 | ) | |
9ec609ec | 340 | else: |
2e90378a | 341 | if beg_clock_snapshot is not None or end_clock_snapshot is not None: |
cfbd7cf3 FD |
342 | raise ValueError( |
343 | 'discarded events have no default clock snapshots for this stream class' | |
344 | ) | |
2e90378a | 345 | |
cfbd7cf3 | 346 | ptr = native_bt.message_discarded_events_create(self._bt_ptr, stream._ptr) |
9ec609ec SM |
347 | |
348 | if ptr is None: | |
694c792b | 349 | raise bt2._MemoryError('cannot discarded events message object') |
9ec609ec | 350 | |
3fb99a22 | 351 | msg = bt2_message._DiscardedEventsMessage(ptr) |
9ec609ec SM |
352 | |
353 | if count is not None: | |
354 | msg._count = count | |
355 | ||
356 | return msg | |
357 | ||
cfbd7cf3 FD |
358 | def _create_discarded_packets_message( |
359 | self, stream, count=None, beg_clock_snapshot=None, end_clock_snapshot=None | |
360 | ): | |
3fb99a22 | 361 | utils._check_type(stream, bt2_stream._Stream) |
9ec609ec | 362 | |
e8ac1aae | 363 | if not stream.cls.supports_discarded_packets: |
2e90378a PP |
364 | raise ValueError('stream class does not support discarded packets') |
365 | ||
e8ac1aae | 366 | if stream.cls.discarded_packets_have_default_clock_snapshots: |
2e90378a | 367 | if beg_clock_snapshot is None or end_clock_snapshot is None: |
cfbd7cf3 FD |
368 | raise ValueError( |
369 | 'discarded packets have default clock snapshots for this stream class' | |
370 | ) | |
2e90378a | 371 | |
9ec609ec SM |
372 | utils._check_uint64(beg_clock_snapshot) |
373 | utils._check_uint64(end_clock_snapshot) | |
374 | ptr = native_bt.message_discarded_packets_create_with_default_clock_snapshots( | |
cfbd7cf3 FD |
375 | self._bt_ptr, stream._ptr, beg_clock_snapshot, end_clock_snapshot |
376 | ) | |
9ec609ec | 377 | else: |
2e90378a | 378 | if beg_clock_snapshot is not None or end_clock_snapshot is not None: |
cfbd7cf3 FD |
379 | raise ValueError( |
380 | 'discarded packets have no default clock snapshots for this stream class' | |
381 | ) | |
2e90378a | 382 | |
cfbd7cf3 | 383 | ptr = native_bt.message_discarded_packets_create(self._bt_ptr, stream._ptr) |
9ec609ec SM |
384 | |
385 | if ptr is None: | |
694c792b | 386 | raise bt2._MemoryError('cannot discarded packets message object') |
9ec609ec | 387 | |
3fb99a22 | 388 | msg = bt2_message._DiscardedPacketsMessage(ptr) |
9ec609ec SM |
389 | |
390 | if count is not None: | |
391 | msg._count = count | |
392 | ||
393 | return msg |