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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 | |
5602ef81 | 24 | import bt2.message_iterator |
81447b5b | 25 | import collections.abc |
c4239792 | 26 | import bt2.value |
811644b8 PP |
27 | import traceback |
28 | import bt2.port | |
40910fbb | 29 | import sys |
81447b5b | 30 | import bt2 |
811644b8 PP |
31 | import os |
32 | ||
33 | ||
34 | _env_var = os.environ.get('BABELTRACE_PYTHON_BT2_NO_TRACEBACK') | |
35 | _NO_PRINT_TRACEBACK = _env_var == '1' | |
81447b5b PP |
36 | |
37 | ||
38 | # This class wraps a component class pointer. This component class could | |
39 | # have been created by Python code, but since we only have the pointer, | |
40 | # we can only wrap it in a generic way and lose the original Python | |
41 | # class. | |
601c0026 SM |
42 | # |
43 | # Subclasses must implement some methods that this base class uses: | |
44 | # | |
45 | # - _as_component_class_ptr: static method, convert the passed component class | |
46 | # pointer to a 'bt_component_class *'. | |
47 | ||
78288f58 | 48 | class _GenericComponentClass(object._SharedObject): |
81447b5b PP |
49 | @property |
50 | def name(self): | |
601c0026 SM |
51 | ptr = self._as_component_class_ptr(self._ptr) |
52 | name = native_bt.component_class_get_name(ptr) | |
53 | assert name is not None | |
811644b8 | 54 | return name |
81447b5b PP |
55 | |
56 | @property | |
57 | def description(self): | |
601c0026 SM |
58 | ptr = self._as_component_class_ptr(self._ptr) |
59 | return native_bt.component_class_get_description(ptr) | |
81447b5b | 60 | |
40910fbb PP |
61 | @property |
62 | def help(self): | |
601c0026 SM |
63 | ptr = self._as_component_class_ptr(self._ptr) |
64 | return native_bt.component_class_get_help(ptr) | |
65 | ||
66 | def _component_class_ptr(self): | |
67 | return self._as_component_class_ptr(self._ptr) | |
40910fbb | 68 | |
811644b8 PP |
69 | def __eq__(self, other): |
70 | if not isinstance(other, _GenericComponentClass): | |
71 | try: | |
72 | if not issubclass(other, _UserComponent): | |
73 | return False | |
74 | except TypeError: | |
75 | return False | |
81447b5b | 76 | |
811644b8 | 77 | return self.addr == other.addr |
81447b5b PP |
78 | |
79 | ||
80 | class _GenericSourceComponentClass(_GenericComponentClass): | |
2f16a6a2 PP |
81 | _get_ref = staticmethod(native_bt.component_class_source_get_ref) |
82 | _put_ref = staticmethod(native_bt.component_class_source_put_ref) | |
83 | _as_component_class_ptr = staticmethod(native_bt.component_class_source_as_component_class) | |
81447b5b PP |
84 | |
85 | ||
86 | class _GenericFilterComponentClass(_GenericComponentClass): | |
2f16a6a2 PP |
87 | _get_ref = staticmethod(native_bt.component_class_filter_get_ref) |
88 | _put_ref = staticmethod(native_bt.component_class_filter_put_ref) | |
89 | _as_component_class_ptr = staticmethod(native_bt.component_class_filter_as_component_class) | |
81447b5b PP |
90 | |
91 | ||
92 | class _GenericSinkComponentClass(_GenericComponentClass): | |
2f16a6a2 PP |
93 | _get_ref = staticmethod(native_bt.component_class_sink_get_ref) |
94 | _put_ref = staticmethod(native_bt.component_class_sink_put_ref) | |
95 | _as_component_class_ptr = staticmethod(native_bt.component_class_sink_as_component_class) | |
81447b5b PP |
96 | |
97 | ||
811644b8 | 98 | def _handle_component_status(status, gen_error_msg): |
894a8df5 | 99 | if status == native_bt.SELF_COMPONENT_STATUS_END: |
811644b8 | 100 | raise bt2.Stop |
894a8df5 | 101 | elif status == native_bt.SELF_COMPONENT_STATUS_AGAIN: |
811644b8 | 102 | raise bt2.TryAgain |
811644b8 PP |
103 | elif status < 0: |
104 | raise bt2.Error(gen_error_msg) | |
105 | ||
106 | ||
107 | class _PortIterator(collections.abc.Iterator): | |
108 | def __init__(self, comp_ports): | |
109 | self._comp_ports = comp_ports | |
110 | self._at = 0 | |
111 | ||
112 | def __next__(self): | |
113 | if self._at == len(self._comp_ports): | |
114 | raise StopIteration | |
115 | ||
116 | comp_ports = self._comp_ports | |
894a8df5 SM |
117 | comp_ptr = comp_ports._component_ptr |
118 | ||
119 | port_ptr = comp_ports._borrow_port_ptr_at_index(comp_ptr, self._at) | |
120 | assert port_ptr is not None | |
121 | ||
122 | name = native_bt.port_get_name(comp_ports._port_pycls._as_port_ptr(port_ptr)) | |
123 | assert name is not None | |
811644b8 | 124 | |
811644b8 PP |
125 | self._at += 1 |
126 | return name | |
127 | ||
128 | ||
129 | class _ComponentPorts(collections.abc.Mapping): | |
894a8df5 SM |
130 | |
131 | # component_ptr is a bt_component_source *, bt_component_filter * or | |
132 | # bt_component_sink *. Its type must match the type expected by the | |
133 | # functions passed as arguments. | |
134 | ||
135 | def __init__(self, component_ptr, | |
136 | borrow_port_ptr_by_name, | |
137 | borrow_port_ptr_at_index, | |
138 | get_port_count, | |
139 | port_pycls): | |
140 | self._component_ptr = component_ptr | |
141 | self._borrow_port_ptr_by_name = borrow_port_ptr_by_name | |
142 | self._borrow_port_ptr_at_index = borrow_port_ptr_at_index | |
143 | self._get_port_count = get_port_count | |
144 | self._port_pycls = port_pycls | |
811644b8 PP |
145 | |
146 | def __getitem__(self, key): | |
147 | utils._check_str(key) | |
894a8df5 | 148 | port_ptr = self._borrow_port_ptr_by_name(self._component_ptr, key) |
811644b8 PP |
149 | |
150 | if port_ptr is None: | |
151 | raise KeyError(key) | |
152 | ||
894a8df5 | 153 | return self._port_pycls._create_from_ptr_and_get_ref(port_ptr) |
811644b8 PP |
154 | |
155 | def __len__(self): | |
894a8df5 SM |
156 | count = self._get_port_count(self._component_ptr) |
157 | assert count >= 0 | |
811644b8 PP |
158 | return count |
159 | ||
160 | def __iter__(self): | |
161 | return _PortIterator(self) | |
162 | ||
163 | ||
81447b5b | 164 | # This class holds the methods which are common to both generic |
601c0026 SM |
165 | # component objects and Python user component objects. |
166 | # | |
167 | # Subclasses must provide these methods or property: | |
168 | # | |
169 | # - _borrow_component_class_ptr: static method, must return a pointer to the | |
170 | # specialized component class (e.g. 'bt_component_class_sink *') of the | |
171 | # passed specialized component pointer (e.g. 'bt_component_sink *'). | |
172 | # - _comp_cls_type: property, one of the native_bt.COMPONENT_CLASS_TYPE_* | |
173 | # constants. | |
1c9ed2ff SM |
174 | # - _as_component_ptr: static method, must return the passed specialized |
175 | # component pointer (e.g. 'bt_component_sink *') as a 'bt_component *'. | |
601c0026 | 176 | |
811644b8 | 177 | class _Component: |
81447b5b PP |
178 | @property |
179 | def name(self): | |
1c9ed2ff SM |
180 | ptr = self._as_component_ptr(self._ptr) |
181 | name = native_bt.component_get_name(ptr) | |
182 | assert name is not None | |
811644b8 PP |
183 | return name |
184 | ||
e874da19 PP |
185 | @property |
186 | def logging_level(self): | |
187 | ptr = self._as_component_ptr(self._ptr) | |
188 | return native_bt.component_get_logging_level(ptr) | |
189 | ||
81447b5b | 190 | @property |
e8ac1aae | 191 | def cls(self): |
601c0026 SM |
192 | cc_ptr = self._borrow_component_class_ptr(self._ptr) |
193 | assert cc_ptr is not None | |
194 | return _create_component_class_from_ptr_and_get_ref(cc_ptr, self._comp_cls_type) | |
81447b5b | 195 | |
811644b8 PP |
196 | def __eq__(self, other): |
197 | if not hasattr(other, 'addr'): | |
198 | return False | |
81447b5b | 199 | |
811644b8 | 200 | return self.addr == other.addr |
81447b5b | 201 | |
81447b5b | 202 | |
811644b8 | 203 | class _SourceComponent(_Component): |
2f16a6a2 | 204 | _borrow_component_class_ptr = staticmethod(native_bt.component_source_borrow_class_const) |
601c0026 | 205 | _comp_cls_type = native_bt.COMPONENT_CLASS_TYPE_SOURCE |
2f16a6a2 PP |
206 | _as_component_class_ptr = staticmethod(native_bt.component_class_source_as_component_class) |
207 | _as_component_ptr = staticmethod(native_bt.component_source_as_component_const) | |
81447b5b | 208 | |
81447b5b | 209 | |
811644b8 | 210 | class _FilterComponent(_Component): |
2f16a6a2 | 211 | _borrow_component_class_ptr = staticmethod(native_bt.component_filter_borrow_class_const) |
601c0026 | 212 | _comp_cls_type = native_bt.COMPONENT_CLASS_TYPE_FILTER |
2f16a6a2 PP |
213 | _as_component_class_ptr = staticmethod(native_bt.component_class_filter_as_component_class) |
214 | _as_component_ptr = staticmethod(native_bt.component_filter_as_component_const) | |
81447b5b | 215 | |
81447b5b | 216 | |
811644b8 | 217 | class _SinkComponent(_Component): |
2f16a6a2 | 218 | _borrow_component_class_ptr = staticmethod(native_bt.component_sink_borrow_class_const) |
601c0026 | 219 | _comp_cls_type = native_bt.COMPONENT_CLASS_TYPE_SINK |
2f16a6a2 PP |
220 | _as_component_class_ptr = staticmethod(native_bt.component_class_sink_as_component_class) |
221 | _as_component_ptr = staticmethod(native_bt.component_sink_as_component_const) | |
81447b5b PP |
222 | |
223 | ||
224 | # This is analogous to _GenericSourceComponentClass, but for source | |
225 | # component objects. | |
78288f58 | 226 | class _GenericSourceComponent(object._SharedObject, _SourceComponent): |
894a8df5 SM |
227 | _get_ref = staticmethod(native_bt.component_source_get_ref) |
228 | _put_ref = staticmethod(native_bt.component_source_put_ref) | |
229 | ||
811644b8 PP |
230 | @property |
231 | def output_ports(self): | |
894a8df5 SM |
232 | return _ComponentPorts(self._ptr, |
233 | native_bt.component_source_borrow_output_port_by_name_const, | |
234 | native_bt.component_source_borrow_output_port_by_index_const, | |
235 | native_bt.component_source_get_output_port_count, | |
236 | bt2.port._OutputPort) | |
81447b5b PP |
237 | |
238 | ||
239 | # This is analogous to _GenericFilterComponentClass, but for filter | |
240 | # component objects. | |
78288f58 | 241 | class _GenericFilterComponent(object._SharedObject, _FilterComponent): |
894a8df5 SM |
242 | _get_ref = staticmethod(native_bt.component_filter_get_ref) |
243 | _put_ref = staticmethod(native_bt.component_filter_put_ref) | |
244 | ||
811644b8 PP |
245 | @property |
246 | def output_ports(self): | |
894a8df5 SM |
247 | return _ComponentPorts(self._ptr, |
248 | native_bt.component_filter_borrow_output_port_by_name_const, | |
249 | native_bt.component_filter_borrow_output_port_by_index_const, | |
250 | native_bt.component_filter_get_output_port_count, | |
251 | bt2.port._OutputPort) | |
811644b8 PP |
252 | |
253 | @property | |
254 | def input_ports(self): | |
894a8df5 SM |
255 | return _ComponentPorts(self._ptr, |
256 | native_bt.component_filter_borrow_input_port_by_name_const, | |
257 | native_bt.component_filter_borrow_input_port_by_index_const, | |
258 | native_bt.component_filter_get_input_port_count, | |
259 | bt2.port._InputPort) | |
81447b5b PP |
260 | |
261 | ||
262 | # This is analogous to _GenericSinkComponentClass, but for sink | |
263 | # component objects. | |
78288f58 | 264 | class _GenericSinkComponent(object._SharedObject, _SinkComponent): |
2f16a6a2 PP |
265 | _get_ref = staticmethod(native_bt.component_sink_get_ref) |
266 | _put_ref = staticmethod(native_bt.component_sink_put_ref) | |
601c0026 | 267 | |
811644b8 PP |
268 | @property |
269 | def input_ports(self): | |
894a8df5 SM |
270 | return _ComponentPorts(self._ptr, |
271 | native_bt.component_sink_borrow_input_port_by_name_const, | |
272 | native_bt.component_sink_borrow_input_port_by_index_const, | |
273 | native_bt.component_sink_get_input_port_count, | |
274 | bt2.port._InputPort) | |
81447b5b PP |
275 | |
276 | ||
811644b8 | 277 | _COMP_CLS_TYPE_TO_GENERIC_COMP_PYCLS = { |
81447b5b PP |
278 | native_bt.COMPONENT_CLASS_TYPE_SOURCE: _GenericSourceComponent, |
279 | native_bt.COMPONENT_CLASS_TYPE_FILTER: _GenericFilterComponent, | |
280 | native_bt.COMPONENT_CLASS_TYPE_SINK: _GenericSinkComponent, | |
281 | } | |
282 | ||
283 | ||
811644b8 | 284 | _COMP_CLS_TYPE_TO_GENERIC_COMP_CLS_PYCLS = { |
81447b5b PP |
285 | native_bt.COMPONENT_CLASS_TYPE_SOURCE: _GenericSourceComponentClass, |
286 | native_bt.COMPONENT_CLASS_TYPE_FILTER: _GenericFilterComponentClass, | |
287 | native_bt.COMPONENT_CLASS_TYPE_SINK: _GenericSinkComponentClass, | |
288 | } | |
289 | ||
290 | ||
601c0026 SM |
291 | # Create a component Python object of type _GenericSourceComponent, |
292 | # _GenericFilterComponent or _GenericSinkComponent, depending on | |
293 | # comp_cls_type. | |
294 | # | |
295 | # Steals the reference to ptr from the caller. | |
296 | ||
297 | def _create_component_from_ptr(ptr, comp_cls_type): | |
811644b8 | 298 | return _COMP_CLS_TYPE_TO_GENERIC_COMP_PYCLS[comp_cls_type]._create_from_ptr(ptr) |
81447b5b | 299 | |
5f25509b SM |
300 | |
301 | # Same as the above, but acquire a new reference instead of stealing the | |
302 | # reference from the caller. | |
303 | ||
304 | def _create_component_from_ptr_and_get_ref(ptr, comp_cls_type): | |
305 | return _COMP_CLS_TYPE_TO_GENERIC_COMP_PYCLS[comp_cls_type]._create_from_ptr_and_get_ref(ptr) | |
306 | ||
307 | ||
601c0026 SM |
308 | # Create a component class Python object of type |
309 | # _GenericSourceComponentClass, _GenericFilterComponentClass or | |
310 | # _GenericSinkComponentClass, depending on comp_cls_type. | |
311 | # | |
312 | # Acquires a new reference to ptr. | |
81447b5b | 313 | |
601c0026 SM |
314 | def _create_component_class_from_ptr_and_get_ref(ptr, comp_cls_type): |
315 | return _COMP_CLS_TYPE_TO_GENERIC_COMP_CLS_PYCLS[comp_cls_type]._create_from_ptr_and_get_ref(ptr) | |
81447b5b PP |
316 | |
317 | ||
40910fbb PP |
318 | def _trim_docstring(docstring): |
319 | lines = docstring.expandtabs().splitlines() | |
320 | indent = sys.maxsize | |
321 | ||
322 | for line in lines[1:]: | |
323 | stripped = line.lstrip() | |
324 | ||
325 | if stripped: | |
326 | indent = min(indent, len(line) - len(stripped)) | |
327 | ||
328 | trimmed = [lines[0].strip()] | |
329 | ||
330 | if indent < sys.maxsize: | |
331 | for line in lines[1:]: | |
332 | trimmed.append(line[indent:].rstrip()) | |
333 | ||
334 | while trimmed and not trimmed[-1]: | |
335 | trimmed.pop() | |
336 | ||
337 | while trimmed and not trimmed[0]: | |
338 | trimmed.pop(0) | |
339 | ||
340 | return '\n'.join(trimmed) | |
341 | ||
342 | ||
81447b5b PP |
343 | # Metaclass for component classes defined by Python code. |
344 | # | |
345 | # The Python user can create a standard Python class which inherits one | |
811644b8 PP |
346 | # of the three base classes (_UserSourceComponent, _UserFilterComponent, |
347 | # or _UserSinkComponent). Those base classes set this class | |
81447b5b PP |
348 | # (_UserComponentType) as their metaclass. |
349 | # | |
350 | # Once the body of a user-defined component class is executed, this | |
351 | # metaclass is used to create and initialize the class. The metaclass | |
352 | # creates a native BT component class of the corresponding type and | |
353 | # associates it with this user-defined class. The metaclass also defines | |
354 | # class methods like the `name` and `description` properties to match | |
355 | # the _GenericComponentClass interface. | |
356 | # | |
357 | # The component class name which is used is either: | |
358 | # | |
359 | # * The `name` parameter of the class: | |
360 | # | |
361 | # class MySink(bt2.SinkComponent, name='my-custom-sink'): | |
362 | # ... | |
363 | # | |
364 | # * If the `name` class parameter is not used: the name of the class | |
365 | # itself (`MySink` in the example above). | |
366 | # | |
367 | # The component class description which is used is the user-defined | |
368 | # class's docstring: | |
369 | # | |
370 | # class MySink(bt2.SinkComponent): | |
371 | # 'Description goes here' | |
372 | # ... | |
373 | # | |
374 | # A user-defined Python component class can have an __init__() method | |
375 | # which must at least accept the `params` and `name` arguments: | |
376 | # | |
377 | # def __init__(self, params, name, something_else): | |
378 | # ... | |
379 | # | |
811644b8 | 380 | # The user-defined component class can also have a _finalize() method |
81447b5b | 381 | # (do NOT use __del__()) to be notified when the component object is |
811644b8 | 382 | # finalized. |
81447b5b PP |
383 | # |
384 | # User-defined source and filter component classes must use the | |
5602ef81 SM |
385 | # `message_iterator_class` class parameter to specify the |
386 | # message iterator class to use for this component class: | |
81447b5b | 387 | # |
5602ef81 | 388 | # class MyMessageIterator(bt2._UserMessageIterator): |
81447b5b PP |
389 | # ... |
390 | # | |
811644b8 | 391 | # class MySource(bt2._UserSourceComponent, |
5602ef81 | 392 | # message_iterator_class=MyMessageIterator): |
81447b5b PP |
393 | # ... |
394 | # | |
5602ef81 SM |
395 | # This message iterator class must inherit |
396 | # bt2._UserMessageIterator, and it must define the _get() and | |
397 | # _next() methods. The message iterator class can also define an | |
81447b5b PP |
398 | # __init__() method: this method has access to the original Python |
399 | # component object which was used to create it as the `component` | |
5602ef81 | 400 | # property. The message iterator class can also define a |
811644b8 | 401 | # _finalize() method (again, do NOT use __del__()): this is called when |
5602ef81 | 402 | # the message iterator is (really) destroyed. |
81447b5b PP |
403 | # |
404 | # When the user-defined class is destroyed, this metaclass's __del__() | |
405 | # method is called: the native BT component class pointer is put (not | |
406 | # needed anymore, at least not by any Python code since all references | |
407 | # are dropped for __del__() to be called). | |
408 | class _UserComponentType(type): | |
409 | # __new__() is used to catch custom class parameters | |
410 | def __new__(meta_cls, class_name, bases, attrs, **kwargs): | |
411 | return super().__new__(meta_cls, class_name, bases, attrs) | |
412 | ||
413 | def __init__(cls, class_name, bases, namespace, **kwargs): | |
414 | super().__init__(class_name, bases, namespace) | |
415 | ||
416 | # skip our own bases; they are never directly instantiated by the user | |
811644b8 PP |
417 | own_bases = ( |
418 | '_UserComponent', | |
419 | '_UserFilterSinkComponent', | |
420 | '_UserSourceComponent', | |
421 | '_UserFilterComponent', | |
422 | '_UserSinkComponent', | |
423 | ) | |
424 | ||
425 | if class_name in own_bases: | |
81447b5b PP |
426 | return |
427 | ||
428 | comp_cls_name = kwargs.get('name', class_name) | |
811644b8 | 429 | utils._check_str(comp_cls_name) |
40910fbb PP |
430 | comp_cls_descr = None |
431 | comp_cls_help = None | |
432 | ||
433 | if hasattr(cls, '__doc__') and cls.__doc__ is not None: | |
811644b8 | 434 | utils._check_str(cls.__doc__) |
40910fbb PP |
435 | docstring = _trim_docstring(cls.__doc__) |
436 | lines = docstring.splitlines() | |
437 | ||
438 | if len(lines) >= 1: | |
439 | comp_cls_descr = lines[0] | |
440 | ||
441 | if len(lines) >= 3: | |
442 | comp_cls_help = '\n'.join(lines[2:]) | |
443 | ||
5602ef81 | 444 | iter_cls = kwargs.get('message_iterator_class') |
81447b5b | 445 | |
811644b8 | 446 | if _UserSourceComponent in bases: |
81447b5b | 447 | _UserComponentType._set_iterator_class(cls, iter_cls) |
81447b5b PP |
448 | cc_ptr = native_bt.py3_component_class_source_create(cls, |
449 | comp_cls_name, | |
450 | comp_cls_descr, | |
811644b8 PP |
451 | comp_cls_help) |
452 | elif _UserFilterComponent in bases: | |
81447b5b | 453 | _UserComponentType._set_iterator_class(cls, iter_cls) |
81447b5b PP |
454 | cc_ptr = native_bt.py3_component_class_filter_create(cls, |
455 | comp_cls_name, | |
456 | comp_cls_descr, | |
811644b8 PP |
457 | comp_cls_help) |
458 | elif _UserSinkComponent in bases: | |
81447b5b | 459 | if not hasattr(cls, '_consume'): |
811644b8 | 460 | raise bt2.IncompleteUserClass("cannot create component class '{}': missing a _consume() method".format(class_name)) |
81447b5b PP |
461 | |
462 | cc_ptr = native_bt.py3_component_class_sink_create(cls, | |
463 | comp_cls_name, | |
40910fbb PP |
464 | comp_cls_descr, |
465 | comp_cls_help) | |
81447b5b | 466 | else: |
811644b8 | 467 | raise bt2.IncompleteUserClass("cannot find a known component class base in the bases of '{}'".format(class_name)) |
81447b5b PP |
468 | |
469 | if cc_ptr is None: | |
470 | raise bt2.CreationError("cannot create component class '{}'".format(class_name)) | |
471 | ||
472 | cls._cc_ptr = cc_ptr | |
473 | ||
811644b8 PP |
474 | def _init_from_native(cls, comp_ptr, params_ptr): |
475 | # create instance, not user-initialized yet | |
81447b5b PP |
476 | self = cls.__new__(cls) |
477 | ||
601c0026 | 478 | # pointer to native self component object (weak/borrowed) |
811644b8 | 479 | self._ptr = comp_ptr |
81447b5b | 480 | |
811644b8 PP |
481 | # call user's __init__() method |
482 | if params_ptr is not None: | |
601c0026 | 483 | params = bt2.value._create_from_ptr_and_get_ref(params_ptr) |
811644b8 PP |
484 | else: |
485 | params = None | |
81447b5b | 486 | |
811644b8 | 487 | self.__init__(params) |
81447b5b PP |
488 | return self |
489 | ||
811644b8 PP |
490 | def __call__(cls, *args, **kwargs): |
491 | raise bt2.Error('cannot directly instantiate a user component from a Python module') | |
81447b5b PP |
492 | |
493 | @staticmethod | |
494 | def _set_iterator_class(cls, iter_cls): | |
495 | if iter_cls is None: | |
5602ef81 | 496 | raise bt2.IncompleteUserClass("cannot create component class '{}': missing message iterator class".format(cls.__name__)) |
81447b5b | 497 | |
5602ef81 SM |
498 | if not issubclass(iter_cls, bt2.message_iterator._UserMessageIterator): |
499 | raise bt2.IncompleteUserClass("cannot create component class '{}': message iterator class does not inherit bt2._UserMessageIterator".format(cls.__name__)) | |
81447b5b | 500 | |
811644b8 | 501 | if not hasattr(iter_cls, '__next__'): |
5602ef81 | 502 | raise bt2.IncompleteUserClass("cannot create component class '{}': message iterator class is missing a __next__() method".format(cls.__name__)) |
81447b5b PP |
503 | |
504 | cls._iter_cls = iter_cls | |
505 | ||
506 | @property | |
507 | def name(cls): | |
601c0026 SM |
508 | ptr = cls._as_component_class_ptr(cls._cc_ptr) |
509 | return native_bt.component_class_get_name(ptr) | |
81447b5b PP |
510 | |
511 | @property | |
512 | def description(cls): | |
601c0026 SM |
513 | ptr = cls._as_component_class_ptr(cls._cc_ptr) |
514 | return native_bt.component_class_get_description(ptr) | |
81447b5b | 515 | |
40910fbb PP |
516 | @property |
517 | def help(cls): | |
601c0026 SM |
518 | ptr = cls._as_component_class_ptr(cls._cc_ptr) |
519 | return native_bt.component_class_get_help(ptr) | |
40910fbb | 520 | |
81447b5b PP |
521 | @property |
522 | def addr(cls): | |
523 | return int(cls._cc_ptr) | |
524 | ||
f4e38e70 | 525 | def _query_from_native(cls, query_exec_ptr, obj, params_ptr, log_level): |
911dec08 | 526 | # this can raise, in which case the native call to |
a67681c1 | 527 | # bt_component_class_query() returns NULL |
811644b8 | 528 | if params_ptr is not None: |
601c0026 | 529 | params = bt2.value._create_from_ptr_and_get_ref(params_ptr) |
811644b8 PP |
530 | else: |
531 | params = None | |
532 | ||
601c0026 SM |
533 | query_exec = bt2.QueryExecutor._create_from_ptr_and_get_ref( |
534 | query_exec_ptr) | |
811644b8 | 535 | |
c7eee084 | 536 | # this can raise, but the native side checks the exception |
f4e38e70 | 537 | results = cls._query(query_exec, obj, params, log_level) |
811644b8 | 538 | |
c7eee084 PP |
539 | # this can raise, but the native side checks the exception |
540 | results = bt2.create_value(results) | |
911dec08 PP |
541 | |
542 | if results is None: | |
543 | results_addr = int(native_bt.value_null) | |
544 | else: | |
811644b8 | 545 | # return new reference |
601c0026 | 546 | results_addr = int(results._release()) |
911dec08 PP |
547 | |
548 | return results_addr | |
549 | ||
9cf25bf2 | 550 | def _query(cls, query_executor, obj, params, log_level): |
601c0026 | 551 | raise NotImplementedError |
811644b8 | 552 | |
601c0026 SM |
553 | def _component_class_ptr(self): |
554 | return self._as_component_class_ptr(self._cc_ptr) | |
911dec08 | 555 | |
81447b5b PP |
556 | def __del__(cls): |
557 | if hasattr(cls, '_cc_ptr'): | |
601c0026 SM |
558 | cc_ptr = cls._as_component_class_ptr(cls._cc_ptr) |
559 | native_bt.component_class_put_ref(cc_ptr) | |
81447b5b | 560 | |
1c9ed2ff SM |
561 | # Subclasses must provide these methods or property: |
562 | # | |
563 | # - _as_not_self_specific_component_ptr: static method, must return the passed | |
564 | # specialized self component pointer (e.g. 'bt_self_component_sink *') as a | |
565 | # specialized non-self pointer (e.g. 'bt_component_sink *'). | |
566 | # - _borrow_component_class_ptr: static method, must return a pointer to the | |
567 | # specialized component class (e.g. 'bt_component_class_sink *') of the | |
568 | # passed specialized component pointer (e.g. 'bt_component_sink *'). | |
569 | # - _comp_cls_type: property, one of the native_bt.COMPONENT_CLASS_TYPE_* | |
570 | # constants. | |
81447b5b | 571 | |
811644b8 PP |
572 | class _UserComponent(metaclass=_UserComponentType): |
573 | @property | |
574 | def name(self): | |
1c9ed2ff SM |
575 | ptr = self._as_not_self_specific_component_ptr(self._ptr) |
576 | ptr = self._as_component_ptr(ptr) | |
577 | name = native_bt.component_get_name(ptr) | |
578 | assert name is not None | |
811644b8 | 579 | return name |
81447b5b | 580 | |
e874da19 PP |
581 | @property |
582 | def logging_level(self): | |
583 | ptr = self._as_not_self_specific_component_ptr(self._ptr) | |
584 | ptr = self._as_component_ptr(ptr) | |
585 | return native_bt.component_get_logging_level(ptr) | |
586 | ||
811644b8 | 587 | @property |
e8ac1aae | 588 | def cls(self): |
1c9ed2ff SM |
589 | comp_ptr = self._as_not_self_specific_component_ptr(self._ptr) |
590 | cc_ptr = self._borrow_component_class_ptr(comp_ptr) | |
591 | return _create_component_class_from_ptr_and_get_ref(cc_ptr, self._comp_cls_type) | |
81447b5b | 592 | |
81447b5b PP |
593 | @property |
594 | def addr(self): | |
595 | return int(self._ptr) | |
596 | ||
811644b8 | 597 | def __init__(self, params=None): |
81447b5b PP |
598 | pass |
599 | ||
811644b8 | 600 | def _finalize(self): |
81447b5b PP |
601 | pass |
602 | ||
811644b8 PP |
603 | def _port_connected(self, port, other_port): |
604 | pass | |
81447b5b | 605 | |
894a8df5 SM |
606 | def _port_connected_from_native(self, self_port_ptr, self_port_type, other_port_ptr): |
607 | port = bt2.port._create_self_from_ptr_and_get_ref( | |
608 | self_port_ptr, self_port_type) | |
2c67587a SM |
609 | |
610 | if self_port_type == native_bt.PORT_TYPE_OUTPUT: | |
611 | other_port_type = native_bt.PORT_TYPE_INPUT | |
612 | else: | |
613 | other_port_type = native_bt.PORT_TYPE_OUTPUT | |
614 | ||
894a8df5 SM |
615 | other_port = bt2.port._create_from_ptr_and_get_ref( |
616 | other_port_ptr, other_port_type) | |
617 | self._port_connected(port, other_port) | |
81447b5b | 618 | |
5f25509b SM |
619 | def _graph_is_configured_from_native(self): |
620 | self._graph_is_configured() | |
621 | ||
fbbe9302 SM |
622 | def _create_trace_class(self, env=None, uuid=None, |
623 | assigns_automatic_stream_class_id=True): | |
624 | ptr = self._as_self_component_ptr(self._ptr) | |
625 | tc_ptr = native_bt.trace_class_create(ptr) | |
626 | ||
627 | if tc_ptr is None: | |
628 | raise bt2.CreationError('could not create trace class') | |
629 | ||
2c6f8520 | 630 | tc = bt2._TraceClass._create_from_ptr(tc_ptr) |
fbbe9302 SM |
631 | |
632 | if env is not None: | |
633 | for key, value in env.items(): | |
634 | tc.env[key] = value | |
635 | ||
636 | if uuid is not None: | |
637 | tc._uuid = uuid | |
638 | ||
639 | tc._assigns_automatic_stream_class_id = assigns_automatic_stream_class_id | |
640 | ||
641 | return tc | |
642 | ||
be7bbff9 SM |
643 | def _create_clock_class(self, frequency=None, name=None, description=None, |
644 | precision=None, offset=None, origin_is_unix_epoch=True, | |
645 | uuid=None): | |
3cdfbaea SM |
646 | ptr = self._as_self_component_ptr(self._ptr) |
647 | cc_ptr = native_bt.clock_class_create(ptr) | |
648 | ||
649 | if cc_ptr is None: | |
650 | raise bt2.CreationError('could not create clock class') | |
651 | ||
be7bbff9 | 652 | cc = bt2.clock_class._ClockClass._create_from_ptr(cc_ptr) |
2ae9f48c SM |
653 | |
654 | if frequency is not None: | |
655 | cc._frequency = frequency | |
656 | ||
be7bbff9 SM |
657 | if name is not None: |
658 | cc._name = name | |
659 | ||
660 | if description is not None: | |
661 | cc._description = description | |
662 | ||
663 | if precision is not None: | |
664 | cc._precision = precision | |
665 | ||
666 | if offset is not None: | |
667 | cc._offset = offset | |
668 | ||
669 | cc._origin_is_unix_epoch = origin_is_unix_epoch | |
670 | ||
671 | if uuid is not None: | |
672 | cc._uuid = uuid | |
673 | ||
2ae9f48c | 674 | return cc |
3cdfbaea | 675 | |
81447b5b | 676 | |
811644b8 | 677 | class _UserSourceComponent(_UserComponent, _SourceComponent): |
2f16a6a2 | 678 | _as_not_self_specific_component_ptr = staticmethod(native_bt.self_component_source_as_component_source) |
fbbe9302 | 679 | _as_self_component_ptr = staticmethod(native_bt.self_component_source_as_self_component) |
1c9ed2ff | 680 | |
81447b5b | 681 | @property |
811644b8 | 682 | def _output_ports(self): |
894a8df5 SM |
683 | def get_output_port_count(self_ptr): |
684 | ptr = self._as_not_self_specific_component_ptr(self_ptr) | |
685 | return native_bt.component_source_get_output_port_count(ptr) | |
686 | ||
687 | return _ComponentPorts(self._ptr, | |
688 | native_bt.self_component_source_borrow_output_port_by_name, | |
689 | native_bt.self_component_source_borrow_output_port_by_index, | |
690 | get_output_port_count, | |
691 | bt2.port._UserComponentOutputPort) | |
811644b8 | 692 | |
2e00bc76 | 693 | def _add_output_port(self, name, user_data=None): |
811644b8 | 694 | utils._check_str(name) |
894a8df5 | 695 | fn = native_bt.self_component_source_add_output_port |
2e00bc76 | 696 | comp_status, self_port_ptr = fn(self._ptr, name, user_data) |
811644b8 PP |
697 | _handle_component_status(comp_status, |
698 | 'cannot add output port to source component object') | |
894a8df5 SM |
699 | assert self_port_ptr is not None |
700 | return bt2.port._UserComponentOutputPort._create_from_ptr(self_port_ptr) | |
811644b8 PP |
701 | |
702 | ||
703 | class _UserFilterComponent(_UserComponent, _FilterComponent): | |
2f16a6a2 | 704 | _as_not_self_specific_component_ptr = staticmethod(native_bt.self_component_filter_as_component_filter) |
fbbe9302 | 705 | _as_self_component_ptr = staticmethod(native_bt.self_component_filter_as_self_component) |
1c9ed2ff | 706 | |
811644b8 PP |
707 | @property |
708 | def _output_ports(self): | |
894a8df5 SM |
709 | def get_output_port_count(self_ptr): |
710 | ptr = self._as_not_self_specific_component_ptr(self_ptr) | |
711 | return native_bt.component_filter_get_output_port_count(ptr) | |
712 | ||
713 | return _ComponentPorts(self._ptr, | |
714 | native_bt.self_component_filter_borrow_output_port_by_name, | |
715 | native_bt.self_component_filter_borrow_output_port_by_index, | |
716 | get_output_port_count, | |
717 | bt2.port._UserComponentOutputPort) | |
81447b5b | 718 | |
811644b8 PP |
719 | @property |
720 | def _input_ports(self): | |
894a8df5 SM |
721 | def get_input_port_count(self_ptr): |
722 | ptr = self._as_not_self_specific_component_ptr(self_ptr) | |
723 | return native_bt.component_filter_get_input_port_count(ptr) | |
724 | ||
725 | return _ComponentPorts(self._ptr, | |
726 | native_bt.self_component_filter_borrow_input_port_by_name, | |
727 | native_bt.self_component_filter_borrow_input_port_by_index, | |
728 | get_input_port_count, | |
729 | bt2.port._UserComponentInputPort) | |
811644b8 | 730 | |
2e00bc76 | 731 | def _add_output_port(self, name, user_data=None): |
811644b8 | 732 | utils._check_str(name) |
894a8df5 | 733 | fn = native_bt.self_component_filter_add_output_port |
2e00bc76 | 734 | comp_status, self_port_ptr = fn(self._ptr, name, user_data) |
811644b8 PP |
735 | _handle_component_status(comp_status, |
736 | 'cannot add output port to filter component object') | |
894a8df5 SM |
737 | assert self_port_ptr |
738 | return bt2.port._UserComponentOutputPort._create_from_ptr(self_port_ptr) | |
811644b8 | 739 | |
2e00bc76 | 740 | def _add_input_port(self, name, user_data=None): |
811644b8 | 741 | utils._check_str(name) |
894a8df5 | 742 | fn = native_bt.self_component_filter_add_input_port |
2e00bc76 | 743 | comp_status, self_port_ptr = fn(self._ptr, name, user_data) |
811644b8 PP |
744 | _handle_component_status(comp_status, |
745 | 'cannot add input port to filter component object') | |
894a8df5 SM |
746 | assert self_port_ptr |
747 | return bt2.port._UserComponentInputPort._create_from_ptr(self_port_ptr) | |
811644b8 PP |
748 | |
749 | ||
750 | class _UserSinkComponent(_UserComponent, _SinkComponent): | |
2f16a6a2 | 751 | _as_not_self_specific_component_ptr = staticmethod(native_bt.self_component_sink_as_component_sink) |
fbbe9302 | 752 | _as_self_component_ptr = staticmethod(native_bt.self_component_sink_as_self_component) |
1c9ed2ff | 753 | |
811644b8 PP |
754 | @property |
755 | def _input_ports(self): | |
894a8df5 SM |
756 | def get_input_port_count(self_ptr): |
757 | ptr = self._as_not_self_specific_component_ptr(self_ptr) | |
758 | return native_bt.component_sink_get_input_port_count(ptr) | |
759 | ||
760 | return _ComponentPorts(self._ptr, | |
761 | native_bt.self_component_sink_borrow_input_port_by_name, | |
762 | native_bt.self_component_sink_borrow_input_port_by_index, | |
763 | get_input_port_count, | |
764 | bt2.port._UserComponentInputPort) | |
811644b8 | 765 | |
2e00bc76 | 766 | def _add_input_port(self, name, user_data=None): |
811644b8 | 767 | utils._check_str(name) |
894a8df5 | 768 | fn = native_bt.self_component_sink_add_input_port |
2e00bc76 | 769 | comp_status, self_port_ptr = fn(self._ptr, name, user_data) |
811644b8 PP |
770 | _handle_component_status(comp_status, |
771 | 'cannot add input port to sink component object') | |
5f25509b SM |
772 | assert self_port_ptr |
773 | return bt2.port._UserComponentInputPort._create_from_ptr(self_port_ptr) |