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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 | |
fa4c33e3 | 24 | import bt2.message |
81447b5b PP |
25 | import collections.abc |
26 | import bt2.component | |
692f1a01 | 27 | import bt2.port |
81447b5b PP |
28 | import bt2 |
29 | ||
30 | ||
fa4c33e3 | 31 | class _MessageIterator(collections.abc.Iterator): |
81447b5b | 32 | def __next__(self): |
f6a5e476 | 33 | raise NotImplementedError |
81447b5b PP |
34 | |
35 | ||
c3044a97 | 36 | class _GenericMessageIterator(object._SharedObject, _MessageIterator): |
27d97a3f | 37 | def __init__(self, ptr): |
61d96b89 FD |
38 | self._current_msgs = [] |
39 | self._at = 0 | |
40 | super().__init__(ptr) | |
f6a5e476 PP |
41 | |
42 | def __next__(self): | |
27d97a3f SM |
43 | if len(self._current_msgs) == self._at: |
44 | status, msgs = self._get_msg_range(self._ptr) | |
61d96b89 FD |
45 | utils._handle_func_status( |
46 | status, 'unexpected error: cannot advance the message iterator' | |
47 | ) | |
27d97a3f SM |
48 | self._current_msgs = msgs |
49 | self._at = 0 | |
50 | ||
51 | msg_ptr = self._current_msgs[self._at] | |
52 | self._at += 1 | |
53 | ||
54 | return bt2.message._create_from_ptr(msg_ptr) | |
81447b5b | 55 | |
39ddfa44 SM |
56 | @property |
57 | def can_seek_beginning(self): | |
58 | res = self._can_seek_beginning(self._ptr) | |
59 | return res != 0 | |
60 | ||
61 | def seek_beginning(self): | |
62 | # Forget about buffered messages, they won't be valid after seeking.. | |
63 | self._current_msgs.clear() | |
64 | self._at = 0 | |
65 | ||
66 | status = self._seek_beginning(self._ptr) | |
61d96b89 | 67 | utils._handle_func_status(status, 'cannot seek message iterator beginning') |
39ddfa44 | 68 | |
f6a5e476 | 69 | |
a4dcfa96 | 70 | # This is created when a component wants to iterate on one of its input ports. |
871a292a | 71 | class _UserComponentInputPortMessageIterator(_GenericMessageIterator): |
fb25b9e3 | 72 | _get_msg_range = staticmethod(native_bt.bt2_self_component_port_input_get_msg_range) |
61d96b89 FD |
73 | _get_ref = staticmethod( |
74 | native_bt.self_component_port_input_message_iterator_get_ref | |
75 | ) | |
76 | _put_ref = staticmethod( | |
77 | native_bt.self_component_port_input_message_iterator_put_ref | |
78 | ) | |
79 | _can_seek_beginning = staticmethod( | |
80 | native_bt.self_component_port_input_message_iterator_can_seek_beginning | |
81 | ) | |
82 | _seek_beginning = staticmethod( | |
83 | native_bt.self_component_port_input_message_iterator_seek_beginning | |
84 | ) | |
fe7265b5 PP |
85 | |
86 | ||
a4dcfa96 SM |
87 | # This is created when the user wants to iterate on a component's output port, |
88 | # from outside the graph. | |
fa4c33e3 | 89 | class _OutputPortMessageIterator(_GenericMessageIterator): |
fb25b9e3 | 90 | _get_msg_range = staticmethod(native_bt.bt2_port_output_get_msg_range) |
27d97a3f SM |
91 | _get_ref = staticmethod(native_bt.port_output_message_iterator_get_ref) |
92 | _put_ref = staticmethod(native_bt.port_output_message_iterator_put_ref) | |
61d96b89 FD |
93 | _can_seek_beginning = staticmethod( |
94 | native_bt.port_output_message_iterator_can_seek_beginning | |
95 | ) | |
96 | _seek_beginning = staticmethod( | |
97 | native_bt.port_output_message_iterator_seek_beginning | |
98 | ) | |
26c5273a PP |
99 | |
100 | ||
a4dcfa96 SM |
101 | # This is extended by the user to implement component classes in Python. It |
102 | # is created for a given output port when an input port message iterator is | |
103 | # created on the input port on the other side of the connection. It is also | |
104 | # created when an output port message iterator is created on this output port. | |
105 | # | |
106 | # Its purpose is to feed the messages that should go out through this output | |
107 | # port. | |
fa4c33e3 | 108 | class _UserMessageIterator(_MessageIterator): |
81447b5b | 109 | def __new__(cls, ptr): |
f6a5e476 | 110 | # User iterator objects are always created by the native side, |
81447b5b PP |
111 | # that is, never instantiated directly by Python code. |
112 | # | |
f6a5e476 PP |
113 | # The native code calls this, then manually calls |
114 | # self.__init__() without the `ptr` argument. The user has | |
115 | # access to self.component during this call, thanks to this | |
deec48a6 | 116 | # self._bt_ptr argument being set. |
81447b5b | 117 | # |
deec48a6 | 118 | # self._bt_ptr is NOT owned by this object here, so there's nothing |
81447b5b PP |
119 | # to do in __del__(). |
120 | self = super().__new__(cls) | |
deec48a6 | 121 | self._bt_ptr = ptr |
81447b5b PP |
122 | return self |
123 | ||
deec48a6 | 124 | def _bt_init_from_native(self, self_output_port_ptr): |
a4dcfa96 | 125 | self_output_port = bt2.port._create_self_from_ptr_and_get_ref( |
61d96b89 FD |
126 | self_output_port_ptr, native_bt.PORT_TYPE_OUTPUT |
127 | ) | |
a4dcfa96 SM |
128 | self.__init__(self_output_port) |
129 | ||
130 | def __init__(self, output_port): | |
81447b5b PP |
131 | pass |
132 | ||
133 | @property | |
f6a5e476 | 134 | def _component(self): |
deec48a6 | 135 | return native_bt.bt2_get_user_component_from_user_msg_iter(self._bt_ptr) |
81447b5b PP |
136 | |
137 | @property | |
138 | def addr(self): | |
deec48a6 | 139 | return int(self._bt_ptr) |
81447b5b | 140 | |
f6a5e476 | 141 | def _finalize(self): |
81447b5b PP |
142 | pass |
143 | ||
f6a5e476 PP |
144 | def __next__(self): |
145 | raise bt2.Stop | |
146 | ||
deec48a6 | 147 | def _bt_next_from_native(self): |
f6a5e476 PP |
148 | # this can raise anything: it's catched by the native part |
149 | try: | |
fa4c33e3 | 150 | msg = next(self) |
f6a5e476 PP |
151 | except StopIteration: |
152 | raise bt2.Stop | |
153 | except: | |
154 | raise | |
155 | ||
fa4c33e3 | 156 | utils._check_type(msg, bt2.message._Message) |
81447b5b | 157 | |
4e853135 SM |
158 | # The reference we return will be given to the message array. |
159 | # However, the `msg` Python object may stay alive, if the user has kept | |
160 | # a reference to it. Acquire a new reference to account for that. | |
161 | msg._get_ref(msg._ptr) | |
162 | return int(msg._ptr) | |
27d97a3f | 163 | |
39ddfa44 | 164 | @property |
deec48a6 | 165 | def _bt_can_seek_beginning_from_native(self): |
39ddfa44 SM |
166 | # Here, we mimic the behavior of the C API: |
167 | # | |
168 | # - If the iterator has a _can_seek_beginning attribute, read it and use | |
169 | # that result. | |
170 | # - Otherwise, the presence or absence of a `_seek_beginning` | |
171 | # method indicates whether the iterator can seek beginning. | |
172 | if hasattr(self, '_can_seek_beginning'): | |
173 | can_seek_beginning = self._can_seek_beginning | |
174 | utils._check_bool(can_seek_beginning) | |
175 | return can_seek_beginning | |
176 | else: | |
177 | return hasattr(self, '_seek_beginning') | |
178 | ||
deec48a6 | 179 | def _bt_seek_beginning_from_native(self): |
39ddfa44 SM |
180 | self._seek_beginning() |
181 | ||
692f1a01 PP |
182 | def _create_input_port_message_iterator(self, input_port): |
183 | utils._check_type(input_port, bt2.port._UserComponentInputPort) | |
184 | ||
185 | msg_iter_ptr = native_bt.self_component_port_input_message_iterator_create_from_message_iterator( | |
186 | self._bt_ptr, input_port._ptr | |
187 | ) | |
188 | ||
189 | if msg_iter_ptr is None: | |
190 | raise bt2.CreationError('cannot create message iterator object') | |
191 | ||
192 | return _UserComponentInputPortMessageIterator(msg_iter_ptr) | |
193 | ||
61d96b89 FD |
194 | def _create_event_message( |
195 | self, event_class, parent=None, default_clock_snapshot=None | |
196 | ): | |
78668ecd | 197 | utils._check_type(event_class, bt2.event_class._EventClass) |
37a93d41 PP |
198 | |
199 | if event_class.stream_class.supports_packets: | |
200 | utils._check_type(parent, bt2.packet._Packet) | |
201 | else: | |
202 | utils._check_type(parent, bt2.stream._Stream) | |
27d97a3f SM |
203 | |
204 | if default_clock_snapshot is not None: | |
dcd94213 | 205 | if event_class.stream_class.default_clock_class is None: |
61d96b89 FD |
206 | raise ValueError( |
207 | 'event messages in this stream must not have a default clock snapshot' | |
208 | ) | |
dcd94213 | 209 | |
27d97a3f | 210 | utils._check_uint64(default_clock_snapshot) |
37a93d41 PP |
211 | |
212 | if event_class.stream_class.supports_packets: | |
213 | ptr = native_bt.message_event_create_with_packet_and_default_clock_snapshot( | |
61d96b89 FD |
214 | self._bt_ptr, event_class._ptr, parent._ptr, default_clock_snapshot |
215 | ) | |
37a93d41 PP |
216 | else: |
217 | ptr = native_bt.message_event_create_with_default_clock_snapshot( | |
61d96b89 FD |
218 | self._bt_ptr, event_class._ptr, parent._ptr, default_clock_snapshot |
219 | ) | |
27d97a3f | 220 | else: |
dcd94213 | 221 | if event_class.stream_class.default_clock_class is not None: |
61d96b89 FD |
222 | raise ValueError( |
223 | 'event messages in this stream must have a default clock snapshot' | |
224 | ) | |
dcd94213 | 225 | |
37a93d41 PP |
226 | if event_class.stream_class.supports_packets: |
227 | ptr = native_bt.message_event_create_with_packet( | |
61d96b89 FD |
228 | self._bt_ptr, event_class._ptr, parent._ptr |
229 | ) | |
37a93d41 PP |
230 | else: |
231 | ptr = native_bt.message_event_create( | |
61d96b89 FD |
232 | self._bt_ptr, event_class._ptr, parent._ptr |
233 | ) | |
27d97a3f SM |
234 | |
235 | if ptr is None: | |
614743a5 | 236 | raise bt2._MemoryError('cannot create event message object') |
27d97a3f SM |
237 | |
238 | return bt2.message._EventMessage(ptr) | |
239 | ||
0010c8b0 SM |
240 | def _create_message_iterator_inactivity_message(self, clock_class, clock_snapshot): |
241 | utils._check_type(clock_class, bt2.clock_class._ClockClass) | |
242 | ptr = native_bt.message_message_iterator_inactivity_create( | |
61d96b89 FD |
243 | self._bt_ptr, clock_class._ptr, clock_snapshot |
244 | ) | |
0010c8b0 SM |
245 | |
246 | if ptr is None: | |
614743a5 | 247 | raise bt2._MemoryError('cannot create inactivity message object') |
0010c8b0 SM |
248 | |
249 | return bt2.message._MessageIteratorInactivityMessage(ptr) | |
250 | ||
b7cbc799 | 251 | def _create_stream_beginning_message(self, stream, default_clock_snapshot=None): |
27d97a3f SM |
252 | utils._check_type(stream, bt2.stream._Stream) |
253 | ||
deec48a6 | 254 | ptr = native_bt.message_stream_beginning_create(self._bt_ptr, stream._ptr) |
27d97a3f | 255 | if ptr is None: |
614743a5 | 256 | raise bt2._MemoryError('cannot create stream beginning message object') |
27d97a3f | 257 | |
b7cbc799 | 258 | msg = bt2.message._StreamBeginningMessage(ptr) |
0010c8b0 | 259 | |
b7cbc799 SM |
260 | if default_clock_snapshot is not None: |
261 | msg._default_clock_snapshot = default_clock_snapshot | |
0010c8b0 | 262 | |
0010c8b0 SM |
263 | return msg |
264 | ||
b7cbc799 | 265 | def _create_stream_end_message(self, stream, default_clock_snapshot=None): |
871a292a SM |
266 | utils._check_type(stream, bt2.stream._Stream) |
267 | ||
deec48a6 | 268 | ptr = native_bt.message_stream_end_create(self._bt_ptr, stream._ptr) |
871a292a | 269 | if ptr is None: |
614743a5 | 270 | raise bt2._MemoryError('cannot create stream end message object') |
871a292a | 271 | |
b7cbc799 SM |
272 | msg = bt2.message._StreamEndMessage(ptr) |
273 | ||
274 | if default_clock_snapshot is not None: | |
275 | msg._default_clock_snapshot = default_clock_snapshot | |
276 | ||
277 | return msg | |
871a292a | 278 | |
27d97a3f SM |
279 | def _create_packet_beginning_message(self, packet, default_clock_snapshot=None): |
280 | utils._check_type(packet, bt2.packet._Packet) | |
281 | ||
c88be1c8 | 282 | if packet.stream.cls.packets_have_beginning_default_clock_snapshot: |
27d97a3f | 283 | if default_clock_snapshot is None: |
61d96b89 FD |
284 | raise ValueError( |
285 | "packet beginning messages in this stream must have a default clock snapshot" | |
286 | ) | |
27d97a3f SM |
287 | |
288 | utils._check_uint64(default_clock_snapshot) | |
289 | ptr = native_bt.message_packet_beginning_create_with_default_clock_snapshot( | |
61d96b89 FD |
290 | self._bt_ptr, packet._ptr, default_clock_snapshot |
291 | ) | |
27d97a3f SM |
292 | else: |
293 | if default_clock_snapshot is not None: | |
61d96b89 FD |
294 | raise ValueError( |
295 | "packet beginning messages in this stream must not have a default clock snapshot" | |
296 | ) | |
27d97a3f | 297 | |
deec48a6 | 298 | ptr = native_bt.message_packet_beginning_create(self._bt_ptr, packet._ptr) |
27d97a3f SM |
299 | |
300 | if ptr is None: | |
614743a5 | 301 | raise bt2._MemoryError('cannot create packet beginning message object') |
27d97a3f SM |
302 | |
303 | return bt2.message._PacketBeginningMessage(ptr) | |
871a292a SM |
304 | |
305 | def _create_packet_end_message(self, packet, default_clock_snapshot=None): | |
306 | utils._check_type(packet, bt2.packet._Packet) | |
871a292a | 307 | |
c88be1c8 | 308 | if packet.stream.cls.packets_have_end_default_clock_snapshot: |
0010c8b0 | 309 | if default_clock_snapshot is None: |
61d96b89 FD |
310 | raise ValueError( |
311 | "packet end messages in this stream must have a default clock snapshot" | |
312 | ) | |
0010c8b0 | 313 | |
871a292a SM |
314 | utils._check_uint64(default_clock_snapshot) |
315 | ptr = native_bt.message_packet_end_create_with_default_clock_snapshot( | |
61d96b89 FD |
316 | self._bt_ptr, packet._ptr, default_clock_snapshot |
317 | ) | |
871a292a | 318 | else: |
0010c8b0 | 319 | if default_clock_snapshot is not None: |
61d96b89 FD |
320 | raise ValueError( |
321 | "packet end messages in this stream must not have a default clock snapshot" | |
322 | ) | |
0010c8b0 | 323 | |
deec48a6 | 324 | ptr = native_bt.message_packet_end_create(self._bt_ptr, packet._ptr) |
871a292a SM |
325 | |
326 | if ptr is None: | |
614743a5 | 327 | raise bt2._MemoryError('cannot create packet end message object') |
871a292a SM |
328 | |
329 | return bt2.message._PacketEndMessage(ptr) | |
0010c8b0 | 330 | |
61d96b89 FD |
331 | def _create_discarded_events_message( |
332 | self, stream, count=None, beg_clock_snapshot=None, end_clock_snapshot=None | |
333 | ): | |
0010c8b0 SM |
334 | utils._check_type(stream, bt2.stream._Stream) |
335 | ||
c88be1c8 | 336 | if not stream.cls.supports_discarded_events: |
77037b2b PP |
337 | raise ValueError('stream class does not support discarded events') |
338 | ||
c88be1c8 | 339 | if stream.cls.discarded_events_have_default_clock_snapshots: |
77037b2b | 340 | if beg_clock_snapshot is None or end_clock_snapshot is None: |
61d96b89 FD |
341 | raise ValueError( |
342 | 'discarded events have default clock snapshots for this stream class' | |
343 | ) | |
77037b2b | 344 | |
0010c8b0 SM |
345 | utils._check_uint64(beg_clock_snapshot) |
346 | utils._check_uint64(end_clock_snapshot) | |
347 | ptr = native_bt.message_discarded_events_create_with_default_clock_snapshots( | |
61d96b89 FD |
348 | self._bt_ptr, stream._ptr, beg_clock_snapshot, end_clock_snapshot |
349 | ) | |
0010c8b0 | 350 | else: |
77037b2b | 351 | if beg_clock_snapshot is not None or end_clock_snapshot is not None: |
61d96b89 FD |
352 | raise ValueError( |
353 | 'discarded events have no default clock snapshots for this stream class' | |
354 | ) | |
77037b2b | 355 | |
61d96b89 | 356 | ptr = native_bt.message_discarded_events_create(self._bt_ptr, stream._ptr) |
0010c8b0 SM |
357 | |
358 | if ptr is None: | |
614743a5 | 359 | raise bt2._MemoryError('cannot discarded events message object') |
0010c8b0 SM |
360 | |
361 | msg = bt2.message._DiscardedEventsMessage(ptr) | |
362 | ||
363 | if count is not None: | |
364 | msg._count = count | |
365 | ||
366 | return msg | |
367 | ||
61d96b89 FD |
368 | def _create_discarded_packets_message( |
369 | self, stream, count=None, beg_clock_snapshot=None, end_clock_snapshot=None | |
370 | ): | |
0010c8b0 SM |
371 | utils._check_type(stream, bt2.stream._Stream) |
372 | ||
c88be1c8 | 373 | if not stream.cls.supports_discarded_packets: |
77037b2b PP |
374 | raise ValueError('stream class does not support discarded packets') |
375 | ||
c88be1c8 | 376 | if stream.cls.discarded_packets_have_default_clock_snapshots: |
77037b2b | 377 | if beg_clock_snapshot is None or end_clock_snapshot is None: |
61d96b89 FD |
378 | raise ValueError( |
379 | 'discarded packets have default clock snapshots for this stream class' | |
380 | ) | |
77037b2b | 381 | |
0010c8b0 SM |
382 | utils._check_uint64(beg_clock_snapshot) |
383 | utils._check_uint64(end_clock_snapshot) | |
384 | ptr = native_bt.message_discarded_packets_create_with_default_clock_snapshots( | |
61d96b89 FD |
385 | self._bt_ptr, stream._ptr, beg_clock_snapshot, end_clock_snapshot |
386 | ) | |
0010c8b0 | 387 | else: |
77037b2b | 388 | if beg_clock_snapshot is not None or end_clock_snapshot is not None: |
61d96b89 FD |
389 | raise ValueError( |
390 | 'discarded packets have no default clock snapshots for this stream class' | |
391 | ) | |
77037b2b | 392 | |
61d96b89 | 393 | ptr = native_bt.message_discarded_packets_create(self._bt_ptr, stream._ptr) |
0010c8b0 SM |
394 | |
395 | if ptr is None: | |
614743a5 | 396 | raise bt2._MemoryError('cannot discarded packets message object') |
0010c8b0 SM |
397 | |
398 | msg = bt2.message._DiscardedPacketsMessage(ptr) | |
399 | ||
400 | if count is not None: | |
401 | msg._count = count | |
402 | ||
403 | return msg |