1 # SPDX-License-Identifier: MIT
3 # Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com>
5 from bt2
import native_bt
, object, utils
6 from bt2
import message_iterator
as bt2_message_iterator
8 from bt2
import value
as bt2_value
9 from bt2
import trace_class
as bt2_trace_class
10 from bt2
import clock_class
as bt2_clock_class
11 from bt2
import query_executor
as bt2_query_executor
12 from bt2
import port
as bt2_port
17 # This class wraps a component class pointer. This component class could
18 # have been created by Python code, but since we only have the pointer,
19 # we can only wrap it in a generic way and lose the original Python
22 # Subclasses must implement some methods that this base class uses:
24 # - _bt_as_component_class_ptr: static method, convert the passed component class
25 # pointer to a 'bt_component_class *'.
28 class _ComponentClassConst(object._SharedObject
):
31 ptr
= self
._bt
_as
_component
_class
_ptr
(self
._ptr
)
32 name
= native_bt
.component_class_get_name(ptr
)
33 assert name
is not None
37 def description(self
):
38 ptr
= self
._bt
_as
_component
_class
_ptr
(self
._ptr
)
39 return native_bt
.component_class_get_description(ptr
)
43 ptr
= self
._bt
_as
_component
_class
_ptr
(self
._ptr
)
44 return native_bt
.component_class_get_help(ptr
)
46 def _bt_component_class_ptr(self
):
47 return self
._bt
_as
_component
_class
_ptr
(self
._ptr
)
49 def __eq__(self
, other
):
50 if not isinstance(other
, _ComponentClassConst
):
52 if not issubclass(other
, _UserComponent
):
57 return self
.addr
== other
.addr
60 class _SourceComponentClassConst(_ComponentClassConst
):
61 _get_ref
= staticmethod(native_bt
.component_class_source_get_ref
)
62 _put_ref
= staticmethod(native_bt
.component_class_source_put_ref
)
63 _bt_as_component_class_ptr
= staticmethod(
64 native_bt
.component_class_source_as_component_class
68 class _FilterComponentClassConst(_ComponentClassConst
):
69 _get_ref
= staticmethod(native_bt
.component_class_filter_get_ref
)
70 _put_ref
= staticmethod(native_bt
.component_class_filter_put_ref
)
71 _bt_as_component_class_ptr
= staticmethod(
72 native_bt
.component_class_filter_as_component_class
76 class _SinkComponentClassConst(_ComponentClassConst
):
77 _get_ref
= staticmethod(native_bt
.component_class_sink_get_ref
)
78 _put_ref
= staticmethod(native_bt
.component_class_sink_put_ref
)
79 _bt_as_component_class_ptr
= staticmethod(
80 native_bt
.component_class_sink_as_component_class
84 class _PortIterator(collections
.abc
.Iterator
):
85 def __init__(self
, comp_ports
):
86 self
._comp
_ports
= comp_ports
90 if self
._at
== len(self
._comp
_ports
):
93 comp_ports
= self
._comp
_ports
94 comp_ptr
= comp_ports
._component
_ptr
96 port_ptr
= comp_ports
._borrow
_port
_ptr
_at
_index
(comp_ptr
, self
._at
)
97 assert port_ptr
is not None
99 name
= native_bt
.port_get_name(comp_ports
._port
_pycls
._as
_port
_ptr
(port_ptr
))
100 assert name
is not None
106 class _ComponentPorts(collections
.abc
.Mapping
):
108 # component_ptr is a bt_component_source *, bt_component_filter * or
109 # bt_component_sink *. Its type must match the type expected by the
110 # functions passed as arguments.
115 borrow_port_ptr_by_name
,
116 borrow_port_ptr_at_index
,
120 self
._component
_ptr
= component_ptr
121 self
._borrow
_port
_ptr
_by
_name
= borrow_port_ptr_by_name
122 self
._borrow
_port
_ptr
_at
_index
= borrow_port_ptr_at_index
123 self
._get
_port
_count
= get_port_count
124 self
._port
_pycls
= port_pycls
126 def __getitem__(self
, key
):
127 utils
._check
_str
(key
)
128 port_ptr
= self
._borrow
_port
_ptr
_by
_name
(self
._component
_ptr
, key
)
133 return self
._port
_pycls
._create
_from
_ptr
_and
_get
_ref
(port_ptr
)
136 count
= self
._get
_port
_count
(self
._component
_ptr
)
141 return _PortIterator(self
)
144 # This class holds the methods which are common to both generic
145 # component objects and Python user component objects.
147 # Subclasses must provide these methods or property:
149 # - _bt_borrow_component_class_ptr: static method, must return a pointer to the
150 # specialized component class (e.g. 'bt_component_class_sink *') of the
151 # passed specialized component pointer (e.g. 'bt_component_sink *').
152 # - _bt_comp_cls_type: property, one of the native_bt.COMPONENT_CLASS_TYPE_*
154 # - _bt_as_component_ptr: static method, must return the passed specialized
155 # component pointer (e.g. 'bt_component_sink *') as a 'bt_component *'.
158 class _ComponentConst
:
161 ptr
= self
._bt
_as
_component
_ptr
(self
._ptr
)
162 name
= native_bt
.component_get_name(ptr
)
163 assert name
is not None
167 def logging_level(self
):
168 ptr
= self
._bt
_as
_component
_ptr
(self
._ptr
)
169 return native_bt
.component_get_logging_level(ptr
)
173 cc_ptr
= self
._bt
_borrow
_component
_class
_ptr
(self
._ptr
)
174 assert cc_ptr
is not None
175 return _create_component_class_from_const_ptr_and_get_ref(
176 cc_ptr
, self
._bt
_comp
_cls
_type
179 def __eq__(self
, other
):
180 if not hasattr(other
, 'addr'):
183 return self
.addr
== other
.addr
186 class _SourceComponentConst(_ComponentConst
):
187 _bt_borrow_component_class_ptr
= staticmethod(
188 native_bt
.component_source_borrow_class_const
190 _bt_comp_cls_type
= native_bt
.COMPONENT_CLASS_TYPE_SOURCE
191 _bt_as_component_class_ptr
= staticmethod(
192 native_bt
.component_class_source_as_component_class
194 _bt_as_component_ptr
= staticmethod(native_bt
.component_source_as_component_const
)
197 class _FilterComponentConst(_ComponentConst
):
198 _bt_borrow_component_class_ptr
= staticmethod(
199 native_bt
.component_filter_borrow_class_const
201 _bt_comp_cls_type
= native_bt
.COMPONENT_CLASS_TYPE_FILTER
202 _bt_as_component_class_ptr
= staticmethod(
203 native_bt
.component_class_filter_as_component_class
205 _bt_as_component_ptr
= staticmethod(native_bt
.component_filter_as_component_const
)
208 class _SinkComponentConst(_ComponentConst
):
209 _bt_borrow_component_class_ptr
= staticmethod(
210 native_bt
.component_sink_borrow_class_const
212 _bt_comp_cls_type
= native_bt
.COMPONENT_CLASS_TYPE_SINK
213 _bt_as_component_class_ptr
= staticmethod(
214 native_bt
.component_class_sink_as_component_class
216 _bt_as_component_ptr
= staticmethod(native_bt
.component_sink_as_component_const
)
219 # This is analogous to _SourceComponentClassConst, but for source
221 class _GenericSourceComponentConst(object._SharedObject
, _SourceComponentConst
):
222 _get_ref
= staticmethod(native_bt
.component_source_get_ref
)
223 _put_ref
= staticmethod(native_bt
.component_source_put_ref
)
226 def output_ports(self
):
227 return _ComponentPorts(
229 native_bt
.component_source_borrow_output_port_by_name_const
,
230 native_bt
.component_source_borrow_output_port_by_index_const
,
231 native_bt
.component_source_get_output_port_count
,
232 bt2_port
._OutputPortConst
,
236 # This is analogous to _FilterComponentClassConst, but for filter
238 class _GenericFilterComponentConst(object._SharedObject
, _FilterComponentConst
):
239 _get_ref
= staticmethod(native_bt
.component_filter_get_ref
)
240 _put_ref
= staticmethod(native_bt
.component_filter_put_ref
)
243 def output_ports(self
):
244 return _ComponentPorts(
246 native_bt
.component_filter_borrow_output_port_by_name_const
,
247 native_bt
.component_filter_borrow_output_port_by_index_const
,
248 native_bt
.component_filter_get_output_port_count
,
249 bt2_port
._OutputPortConst
,
253 def input_ports(self
):
254 return _ComponentPorts(
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
._InputPortConst
,
263 # This is analogous to _SinkComponentClassConst, but for sink
265 class _GenericSinkComponentConst(object._SharedObject
, _SinkComponentConst
):
266 _get_ref
= staticmethod(native_bt
.component_sink_get_ref
)
267 _put_ref
= staticmethod(native_bt
.component_sink_put_ref
)
270 def input_ports(self
):
271 return _ComponentPorts(
273 native_bt
.component_sink_borrow_input_port_by_name_const
,
274 native_bt
.component_sink_borrow_input_port_by_index_const
,
275 native_bt
.component_sink_get_input_port_count
,
276 bt2_port
._InputPortConst
,
280 _COMP_CLS_TYPE_TO_GENERIC_COMP_PYCLS
= {
281 native_bt
.COMPONENT_CLASS_TYPE_SOURCE
: _GenericSourceComponentConst
,
282 native_bt
.COMPONENT_CLASS_TYPE_FILTER
: _GenericFilterComponentConst
,
283 native_bt
.COMPONENT_CLASS_TYPE_SINK
: _GenericSinkComponentConst
,
287 _COMP_CLS_TYPE_TO_GENERIC_COMP_CLS_PYCLS
= {
288 native_bt
.COMPONENT_CLASS_TYPE_SOURCE
: _SourceComponentClassConst
,
289 native_bt
.COMPONENT_CLASS_TYPE_FILTER
: _FilterComponentClassConst
,
290 native_bt
.COMPONENT_CLASS_TYPE_SINK
: _SinkComponentClassConst
,
294 # Create a component Python object of type _GenericSourceComponentConst,
295 # _GenericFilterComponentConst or _GenericSinkComponentConst, depending on
298 # Steals the reference to ptr from the caller.
301 def _create_component_from_const_ptr(ptr
, comp_cls_type
):
302 return _COMP_CLS_TYPE_TO_GENERIC_COMP_PYCLS
[comp_cls_type
]._create
_from
_ptr
(ptr
)
305 # Same as the above, but acquire a new reference instead of stealing the
306 # reference from the caller.
309 def _create_component_from_const_ptr_and_get_ref(ptr
, comp_cls_type
):
310 return _COMP_CLS_TYPE_TO_GENERIC_COMP_PYCLS
[
312 ]._create
_from
_ptr
_and
_get
_ref
(ptr
)
315 # Create a component class Python object of type
316 # _SourceComponentClassConst, _FilterComponentClassConst or
317 # _SinkComponentClassConst, depending on comp_cls_type.
319 # Acquires a new reference to ptr.
322 def _create_component_class_from_const_ptr_and_get_ref(ptr
, comp_cls_type
):
323 return _COMP_CLS_TYPE_TO_GENERIC_COMP_CLS_PYCLS
[
325 ]._create
_from
_ptr
_and
_get
_ref
(ptr
)
328 def _trim_docstring(docstring
):
329 lines
= docstring
.expandtabs().splitlines()
332 for line
in lines
[1:]:
333 stripped
= line
.lstrip()
336 indent
= min(indent
, len(line
) - len(stripped
))
338 trimmed
= [lines
[0].strip()]
340 if indent
< sys
.maxsize
:
341 for line
in lines
[1:]:
342 trimmed
.append(line
[indent
:].rstrip())
344 while trimmed
and not trimmed
[-1]:
347 while trimmed
and not trimmed
[0]:
350 return '\n'.join(trimmed
)
353 # Metaclass for component classes defined by Python code.
355 # The Python user can create a standard Python class which inherits one
356 # of the three base classes (_UserSourceComponent, _UserFilterComponent,
357 # or _UserSinkComponent). Those base classes set this class
358 # (_UserComponentType) as their metaclass.
360 # Once the body of a user-defined component class is executed, this
361 # metaclass is used to create and initialize the class. The metaclass
362 # creates a native BT component class of the corresponding type and
363 # associates it with this user-defined class. The metaclass also defines
364 # class methods like the `name` and `description` properties to match
365 # the _ComponentClassConst interface.
367 # The component class name which is used is either:
369 # * The `name` parameter of the class:
371 # class MySink(bt2.SinkComponent, name='my-custom-sink'):
374 # * If the `name` class parameter is not used: the name of the class
375 # itself (`MySink` in the example above).
377 # The component class description which is used is the user-defined
380 # class MySink(bt2.SinkComponent):
381 # 'Description goes here'
384 # A user-defined Python component class can have an __init__() method
385 # which must accept the following parameters:
387 # def __init__(self, config, params, obj):
390 # The value of the `obj` parameter is what was passed as the `obj`
391 # parameter if the component was instantiated from Python with
392 # Graph.add_component(). If the component was not instantiated from
393 # Python, is is always `None`.
395 # The user-defined component class can also have a _user_finalize()
396 # method (do NOT use __del__()) to be notified when the component object
399 # User-defined source and filter component classes must use the
400 # `message_iterator_class` class parameter to specify the
401 # message iterator class to use for this component class:
403 # class MyMessageIterator(bt2._UserMessageIterator):
406 # class MySource(bt2._UserSourceComponent,
407 # message_iterator_class=MyMessageIterator):
410 # This message iterator class must inherit bt2._UserMessageIterator.
411 # It can implement the __init__() method, which must accept the
412 # following parameters:
414 # def __init__(self, config, port):
417 # It can also implement the __next__() and _user_finalize() methods
418 # (again, do NOT use __del__()), which don't accept any parameters
421 # When the user-defined class is destroyed, this metaclass's __del__()
422 # method is called: the native BT component class pointer is put (not
423 # needed anymore, at least not by any Python code since all references
424 # are dropped for __del__() to be called).
425 class _UserComponentType(type):
426 # __new__() is used to catch custom class parameters
427 def __new__(meta_cls
, class_name
, bases
, attrs
, **kwargs
):
428 return super().__new
__(meta_cls
, class_name
, bases
, attrs
)
430 def __init__(cls
, class_name
, bases
, namespace
, **kwargs
):
431 super().__init
__(class_name
, bases
, namespace
)
433 # skip our own bases; they are never directly instantiated by the user
436 '_UserFilterSinkComponent',
437 '_UserSourceComponent',
438 '_UserFilterComponent',
439 '_UserSinkComponent',
442 if class_name
in own_bases
:
445 comp_cls_name
= kwargs
.get('name', class_name
)
446 utils
._check
_str
(comp_cls_name
)
447 comp_cls_descr
= None
450 if hasattr(cls
, '__doc__') and cls
.__doc
__ is not None:
451 utils
._check
_str
(cls
.__doc
__)
452 docstring
= _trim_docstring(cls
.__doc
__)
453 lines
= docstring
.splitlines()
456 comp_cls_descr
= lines
[0]
459 comp_cls_help
= '\n'.join(lines
[2:])
461 iter_cls
= kwargs
.get('message_iterator_class')
463 if _UserSourceComponent
in bases
:
464 _UserComponentType
._bt
_set
_iterator
_class
(cls
, iter_cls
)
465 cc_ptr
= native_bt
.bt2_component_class_source_create(
466 cls
, comp_cls_name
, comp_cls_descr
, comp_cls_help
468 elif _UserFilterComponent
in bases
:
469 _UserComponentType
._bt
_set
_iterator
_class
(cls
, iter_cls
)
470 cc_ptr
= native_bt
.bt2_component_class_filter_create(
471 cls
, comp_cls_name
, comp_cls_descr
, comp_cls_help
473 elif _UserSinkComponent
in bases
:
474 if not hasattr(cls
, '_user_consume'):
475 raise bt2
._IncompleteUserClass(
476 "cannot create component class '{}': missing a _user_consume() method".format(
481 cc_ptr
= native_bt
.bt2_component_class_sink_create(
482 cls
, comp_cls_name
, comp_cls_descr
, comp_cls_help
485 raise bt2
._IncompleteUserClass(
486 "cannot find a known component class base in the bases of '{}'".format(
492 raise bt2
._MemoryError(
493 "cannot create component class '{}'".format(class_name
)
496 cls
._bt
_cc
_ptr
= cc_ptr
498 def _bt_init_from_native(cls
, comp_ptr
, params_ptr
, obj
):
499 # create instance, not user-initialized yet
500 self
= cls
.__new
__(cls
)
503 config
= cls
._config
_pycls
()
505 # pointer to native self component object (weak/borrowed)
506 self
._bt
_ptr
= comp_ptr
508 # call user's __init__() method
509 if params_ptr
is not None:
510 params
= bt2_value
._create
_from
_const
_ptr
_and
_get
_ref
(params_ptr
)
514 self
.__init
__(config
, params
, obj
)
517 def __call__(cls
, *args
, **kwargs
):
519 'cannot directly instantiate a user component from a Python module'
523 def _bt_set_iterator_class(cls
, iter_cls
):
525 raise bt2
._IncompleteUserClass(
526 "cannot create component class '{}': missing message iterator class".format(
531 if not issubclass(iter_cls
, bt2_message_iterator
._UserMessageIterator
):
532 raise bt2
._IncompleteUserClass(
533 "cannot create component class '{}': message iterator class does not inherit bt2._UserMessageIterator".format(
538 if not hasattr(iter_cls
, '__next__'):
539 raise bt2
._IncompleteUserClass(
540 "cannot create component class '{}': message iterator class is missing a __next__() method".format(
545 if hasattr(iter_cls
, '_user_can_seek_ns_from_origin') and not hasattr(
546 iter_cls
, '_user_seek_ns_from_origin'
548 raise bt2
._IncompleteUserClass(
549 "cannot create component class '{}': message iterator class implements _user_can_seek_ns_from_origin but not _user_seek_ns_from_origin".format(
554 if hasattr(iter_cls
, '_user_can_seek_beginning') and not hasattr(
555 iter_cls
, '_user_seek_beginning'
557 raise bt2
._IncompleteUserClass(
558 "cannot create component class '{}': message iterator class implements _user_can_seek_beginning but not _user_seek_beginning".format(
563 cls
._iter
_cls
= iter_cls
567 ptr
= cls
._bt
_as
_component
_class
_ptr
(cls
._bt
_cc
_ptr
)
568 return native_bt
.component_class_get_name(ptr
)
571 def description(cls
):
572 ptr
= cls
._bt
_as
_component
_class
_ptr
(cls
._bt
_cc
_ptr
)
573 return native_bt
.component_class_get_description(ptr
)
577 ptr
= cls
._bt
_as
_component
_class
_ptr
(cls
._bt
_cc
_ptr
)
578 return native_bt
.component_class_get_help(ptr
)
582 return int(cls
._bt
_cc
_ptr
)
584 def _bt_get_supported_mip_versions_from_native(cls
, params_ptr
, obj
, log_level
):
585 # this can raise, but the native side checks the exception
586 if params_ptr
is not None:
587 params
= bt2_value
._create
_from
_const
_ptr
_and
_get
_ref
(params_ptr
)
591 # this can raise, but the native side checks the exception
592 range_set
= cls
._user
_get
_supported
_mip
_versions
(params
, obj
, log_level
)
594 if type(range_set
) is not bt2
.UnsignedIntegerRangeSet
:
595 # this can raise, but the native side checks the exception
596 range_set
= bt2
.UnsignedIntegerRangeSet(range_set
)
598 # return new reference
599 range_set
._get
_ref
(range_set
._ptr
)
600 return int(range_set
._ptr
)
602 def _user_get_supported_mip_versions(cls
, params
, obj
, log_level
):
605 def _bt_query_from_native(
606 cls
, priv_query_exec_ptr
, object_name
, params_ptr
, method_obj
608 # this can raise, but the native side checks the exception
609 if params_ptr
is not None:
610 params
= bt2_value
._create
_from
_const
_ptr
_and
_get
_ref
(params_ptr
)
614 priv_query_exec
= bt2_query_executor
._PrivateQueryExecutor
(priv_query_exec_ptr
)
617 # this can raise, but the native side checks the exception
618 results
= cls
._user
_query
(priv_query_exec
, object_name
, params
, method_obj
)
620 # the private query executor is a private view on the query
621 # executor; it's not a shared object (the library does not
622 # offer an API to get/put a reference, just like "self"
623 # objects) from this query's point of view, so invalidate
624 # the object in case the user kept a reference and uses it
626 priv_query_exec
._invalidate
()
628 # this can raise, but the native side checks the exception
629 results
= bt2
.create_value(results
)
632 results_ptr
= native_bt
.value_null
634 results_ptr
= results
._ptr
636 # return new reference
637 bt2_value
._Value
._get
_ref
(results_ptr
)
638 return int(results_ptr
)
640 def _user_query(cls
, priv_query_executor
, object_name
, params
, method_obj
):
641 raise bt2
.UnknownObject
643 def _bt_component_class_ptr(self
):
644 return self
._bt
_as
_component
_class
_ptr
(self
._bt
_cc
_ptr
)
647 if hasattr(cls
, '_bt_cc_ptr'):
648 cc_ptr
= cls
._bt
_as
_component
_class
_ptr
(cls
._bt
_cc
_ptr
)
649 native_bt
.component_class_put_ref(cc_ptr
)
650 native_bt
.bt2_unregister_cc_ptr_to_py_cls(cc_ptr
)
653 # Configuration objects for components.
655 # These are passed in __init__ to allow components to change some configuration
656 # parameters during initialization and not after. As you can see, they are not
657 # used at the moment, but are there in case we want to add such parameters.
660 class _UserComponentConfiguration
:
664 class _UserSourceComponentConfiguration(_UserComponentConfiguration
):
668 class _UserFilterComponentConfiguration(_UserComponentConfiguration
):
672 class _UserSinkComponentConfiguration(_UserComponentConfiguration
):
676 # Subclasses must provide these methods or property:
678 # - _bt_as_not_self_specific_component_ptr: static method, must return the passed
679 # specialized self component pointer (e.g. 'bt_self_component_sink *') as a
680 # specialized non-self pointer (e.g. 'bt_component_sink *').
681 # - _bt_borrow_component_class_ptr: static method, must return a pointer to the
682 # specialized component class (e.g. 'bt_component_class_sink *') of the
683 # passed specialized component pointer (e.g. 'bt_component_sink *').
684 # - _bt_comp_cls_type: property, one of the native_bt.COMPONENT_CLASS_TYPE_*
688 class _UserComponent(metaclass
=_UserComponentType
):
691 ptr
= self
._bt
_as
_not
_self
_specific
_component
_ptr
(self
._bt
_ptr
)
692 ptr
= self
._bt
_as
_component
_ptr
(ptr
)
693 name
= native_bt
.component_get_name(ptr
)
694 assert name
is not None
698 def logging_level(self
):
699 ptr
= self
._bt
_as
_not
_self
_specific
_component
_ptr
(self
._bt
_ptr
)
700 ptr
= self
._bt
_as
_component
_ptr
(ptr
)
701 return native_bt
.component_get_logging_level(ptr
)
705 comp_ptr
= self
._bt
_as
_not
_self
_specific
_component
_ptr
(self
._bt
_ptr
)
706 cc_ptr
= self
._bt
_borrow
_component
_class
_ptr
(comp_ptr
)
707 return _create_component_class_from_const_ptr_and_get_ref(
708 cc_ptr
, self
._bt
_comp
_cls
_type
713 return int(self
._bt
_ptr
)
716 def _graph_mip_version(self
):
717 ptr
= self
._bt
_as
_self
_component
_ptr
(self
._bt
_ptr
)
718 return native_bt
.self_component_get_graph_mip_version(ptr
)
720 def __init__(self
, config
, params
, obj
):
723 def _user_finalize(self
):
726 def _user_port_connected(self
, port
, other_port
):
729 def _bt_port_connected_from_native(
730 self
, self_port_ptr
, self_port_type
, other_port_ptr
732 port
= bt2_port
._create
_self
_from
_ptr
_and
_get
_ref
(self_port_ptr
, self_port_type
)
734 if self_port_type
== native_bt
.PORT_TYPE_OUTPUT
:
735 other_port_type
= native_bt
.PORT_TYPE_INPUT
737 other_port_type
= native_bt
.PORT_TYPE_OUTPUT
739 other_port
= bt2_port
._create
_from
_const
_ptr
_and
_get
_ref
(
740 other_port_ptr
, other_port_type
742 self
._user
_port
_connected
(port
, other_port
)
744 def _create_trace_class(
745 self
, user_attributes
=None, assigns_automatic_stream_class_id
=True
747 ptr
= self
._bt
_as
_self
_component
_ptr
(self
._bt
_ptr
)
748 tc_ptr
= native_bt
.trace_class_create(ptr
)
751 raise bt2
._MemoryError('could not create trace class')
753 tc
= bt2_trace_class
._TraceClass
._create
_from
_ptr
(tc_ptr
)
754 tc
._assigns
_automatic
_stream
_class
_id
= assigns_automatic_stream_class_id
756 if user_attributes
is not None:
757 tc
._user
_attributes
= user_attributes
761 def _create_clock_class(
765 user_attributes
=None,
769 origin_is_unix_epoch
=True,
772 ptr
= self
._bt
_as
_self
_component
_ptr
(self
._bt
_ptr
)
773 cc_ptr
= native_bt
.clock_class_create(ptr
)
776 raise bt2
._MemoryError('could not create clock class')
778 cc
= bt2_clock_class
._ClockClass
._create
_from
_ptr
(cc_ptr
)
780 if frequency
is not None:
781 cc
._frequency
= frequency
786 if user_attributes
is not None:
787 cc
._user
_attributes
= user_attributes
789 if description
is not None:
790 cc
._description
= description
792 if precision
is not None:
793 cc
._precision
= precision
795 if offset
is not None:
798 cc
._origin
_is
_unix
_epoch
= origin_is_unix_epoch
806 class _UserSourceComponent(_UserComponent
, _SourceComponentConst
):
807 _bt_as_not_self_specific_component_ptr
= staticmethod(
808 native_bt
.self_component_source_as_component_source
810 _bt_as_self_component_ptr
= staticmethod(
811 native_bt
.self_component_source_as_self_component
813 _config_pycls
= _UserSourceComponentConfiguration
816 def _output_ports(self
):
817 def get_output_port_count(self_ptr
):
818 ptr
= self
._bt
_as
_not
_self
_specific
_component
_ptr
(self_ptr
)
819 return native_bt
.component_source_get_output_port_count(ptr
)
821 return _ComponentPorts(
823 native_bt
.self_component_source_borrow_output_port_by_name
,
824 native_bt
.self_component_source_borrow_output_port_by_index
,
825 get_output_port_count
,
826 bt2_port
._UserComponentOutputPort
,
829 def _add_output_port(self
, name
, user_data
=None):
830 utils
._check
_str
(name
)
832 if name
in self
._output
_ports
:
834 'source component `{}` already contains an output port named `{}`'.format(
839 fn
= native_bt
.self_component_source_add_output_port
840 comp_status
, self_port_ptr
= fn(self
._bt
_ptr
, name
, user_data
)
841 utils
._handle
_func
_status
(
842 comp_status
, 'cannot add output port to source component object'
844 assert self_port_ptr
is not None
845 return bt2_port
._UserComponentOutputPort
._create
_from
_ptr
_and
_get
_ref
(
850 class _UserFilterComponent(_UserComponent
, _FilterComponentConst
):
851 _bt_as_not_self_specific_component_ptr
= staticmethod(
852 native_bt
.self_component_filter_as_component_filter
854 _bt_as_self_component_ptr
= staticmethod(
855 native_bt
.self_component_filter_as_self_component
857 _config_pycls
= _UserFilterComponentConfiguration
860 def _output_ports(self
):
861 def get_output_port_count(self_ptr
):
862 ptr
= self
._bt
_as
_not
_self
_specific
_component
_ptr
(self_ptr
)
863 return native_bt
.component_filter_get_output_port_count(ptr
)
865 return _ComponentPorts(
867 native_bt
.self_component_filter_borrow_output_port_by_name
,
868 native_bt
.self_component_filter_borrow_output_port_by_index
,
869 get_output_port_count
,
870 bt2_port
._UserComponentOutputPort
,
874 def _input_ports(self
):
875 def get_input_port_count(self_ptr
):
876 ptr
= self
._bt
_as
_not
_self
_specific
_component
_ptr
(self_ptr
)
877 return native_bt
.component_filter_get_input_port_count(ptr
)
879 return _ComponentPorts(
881 native_bt
.self_component_filter_borrow_input_port_by_name
,
882 native_bt
.self_component_filter_borrow_input_port_by_index
,
883 get_input_port_count
,
884 bt2_port
._UserComponentInputPort
,
887 def _add_output_port(self
, name
, user_data
=None):
888 utils
._check
_str
(name
)
890 if name
in self
._output
_ports
:
892 'filter component `{}` already contains an output port named `{}`'.format(
897 fn
= native_bt
.self_component_filter_add_output_port
898 comp_status
, self_port_ptr
= fn(self
._bt
_ptr
, name
, user_data
)
899 utils
._handle
_func
_status
(
900 comp_status
, 'cannot add output port to filter component object'
903 return bt2_port
._UserComponentOutputPort
._create
_from
_ptr
_and
_get
_ref
(
907 def _add_input_port(self
, name
, user_data
=None):
908 utils
._check
_str
(name
)
910 if name
in self
._input
_ports
:
912 'filter component `{}` already contains an input port named `{}`'.format(
917 fn
= native_bt
.self_component_filter_add_input_port
918 comp_status
, self_port_ptr
= fn(self
._bt
_ptr
, name
, user_data
)
919 utils
._handle
_func
_status
(
920 comp_status
, 'cannot add input port to filter component object'
923 return bt2_port
._UserComponentInputPort
._create
_from
_ptr
_and
_get
_ref
(
928 class _UserSinkComponent(_UserComponent
, _SinkComponentConst
):
929 _bt_as_not_self_specific_component_ptr
= staticmethod(
930 native_bt
.self_component_sink_as_component_sink
932 _bt_as_self_component_ptr
= staticmethod(
933 native_bt
.self_component_sink_as_self_component
935 _config_pycls
= _UserSinkComponentConfiguration
937 def _bt_graph_is_configured_from_native(self
):
938 self
._user
_graph
_is
_configured
()
940 def _user_graph_is_configured(self
):
944 def _input_ports(self
):
945 def get_input_port_count(self_ptr
):
946 ptr
= self
._bt
_as
_not
_self
_specific
_component
_ptr
(self_ptr
)
947 return native_bt
.component_sink_get_input_port_count(ptr
)
949 return _ComponentPorts(
951 native_bt
.self_component_sink_borrow_input_port_by_name
,
952 native_bt
.self_component_sink_borrow_input_port_by_index
,
953 get_input_port_count
,
954 bt2_port
._UserComponentInputPort
,
957 def _add_input_port(self
, name
, user_data
=None):
958 utils
._check
_str
(name
)
960 if name
in self
._input
_ports
:
962 'sink component `{}` already contains an input port named `{}`'.format(
967 fn
= native_bt
.self_component_sink_add_input_port
968 comp_status
, self_port_ptr
= fn(self
._bt
_ptr
, name
, user_data
)
969 utils
._handle
_func
_status
(
970 comp_status
, 'cannot add input port to sink component object'
973 return bt2_port
._UserComponentInputPort
._create
_from
_ptr
_and
_get
_ref
(
977 def _create_message_iterator(self
, input_port
):
978 utils
._check
_type
(input_port
, bt2_port
._UserComponentInputPort
)
980 if not input_port
.is_connected
:
981 raise ValueError('input port is not connected')
986 ) = native_bt
.bt2_message_iterator_create_from_sink_component(
987 self
._bt
_ptr
, input_port
._ptr
989 utils
._handle
_func
_status
(status
, 'cannot create message iterator object')
990 assert msg_iter_ptr
is not None
992 return bt2_message_iterator
._UserComponentInputPortMessageIterator
(msg_iter_ptr
)
995 def _is_interrupted(self
):
996 return bool(native_bt
.self_component_sink_is_interrupted(self
._bt
_ptr
))