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1 | # The MIT License (MIT) |
2 | # | |
3 | # Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com> | |
4 | # Copyright (c) 2018 Francis Deslauriers <francis.deslauriers@efficios.com> | |
5 | # Copyright (c) 2019 Simon Marchi <simon.marchi@efficios.com> | |
6 | # | |
7 | # Permission is hereby granted, free of charge, to any person obtaining a copy | |
8 | # of this software and associated documentation files (the "Software"), to deal | |
9 | # in the Software without restriction, including without limitation the rights | |
10 | # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
11 | # copies of the Software, and to permit persons to whom the Software is | |
12 | # furnished to do so, subject to the following conditions: | |
13 | # | |
14 | # The above copyright notice and this permission notice shall be included in | |
15 | # all copies or substantial portions of the Software. | |
16 | # | |
17 | # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
18 | # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
20 | # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
21 | # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
22 | # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
23 | # THE SOFTWARE. | |
24 | ||
25 | __all__ = ['TraceClass'] | |
26 | ||
27 | import bt2 | |
28 | from bt2 import native_bt, utils, object | |
29 | import uuid as uuidp | |
30 | import collections.abc | |
31 | import functools | |
32 | ||
33 | ||
34 | class _TraceClassEnv(collections.abc.MutableMapping): | |
35 | def __init__(self, trace_class): | |
36 | self._trace_class = trace_class | |
37 | ||
38 | def __getitem__(self, key): | |
39 | utils._check_str(key) | |
40 | ||
41 | borrow_entry_fn = native_bt.trace_class_borrow_environment_entry_value_by_name_const | |
42 | value_ptr = borrow_entry_fn(self._trace_class._ptr, key) | |
43 | ||
44 | if value_ptr is None: | |
45 | raise KeyError(key) | |
46 | ||
47 | return bt2.value._create_from_ptr_and_get_ref(value_ptr) | |
48 | ||
49 | def __setitem__(self, key, value): | |
50 | if isinstance(value, str): | |
51 | set_env_entry_fn = native_bt.trace_class_set_environment_entry_string | |
52 | elif isinstance(value, int): | |
53 | set_env_entry_fn = native_bt.trace_class_set_environment_entry_integer | |
54 | else: | |
55 | raise TypeError('expected str or int, got {}'.format(type(value))) | |
56 | ||
57 | ret = set_env_entry_fn(self._trace_class._ptr, key, value) | |
58 | ||
59 | utils._handle_ret(ret, "cannot set trace class object's environment entry") | |
60 | ||
61 | def __delitem__(self, key): | |
62 | raise NotImplementedError | |
63 | ||
64 | def __len__(self): | |
65 | count = native_bt.trace_class_get_environment_entry_count(self._trace_class._ptr) | |
66 | assert count >= 0 | |
67 | return count | |
68 | ||
69 | def __iter__(self): | |
70 | trace_class_ptr = self._trace_class_env._trace_class._ptr | |
71 | ||
72 | for idx in range(len(self)): | |
73 | borrow_entry_fn = native_bt.trace_class_borrow_environment_entry_by_index_const | |
74 | entry_name, _ = borrow_entry_fn(trace_class_ptr, idx) | |
75 | assert entry_name is not None | |
76 | yield entry_name | |
77 | ||
78 | ||
79 | class _StreamClassIterator(collections.abc.Iterator): | |
80 | def __init__(self, trace_class): | |
81 | self._trace_class = trace_class | |
82 | self._at = 0 | |
83 | ||
84 | def __next__(self): | |
85 | if self._at == len(self._trace_class): | |
86 | raise StopIteration | |
87 | ||
88 | borrow_stream_class_fn = native_bt.trace_class_borrow_stream_class_by_index_const | |
89 | sc_ptr = borrow_stream_class_fn(self._trace_class._ptr, self._at) | |
90 | assert sc_ptr | |
91 | id = native_bt.stream_class_get_id(sc_ptr) | |
92 | assert id >= 0 | |
93 | self._at += 1 | |
94 | return id | |
95 | ||
96 | ||
97 | def _trace_class_destruction_listener_from_native(user_listener, trace_class_ptr): | |
98 | trace_class = bt2.trace_class.TraceClass._create_from_ptr_and_get_ref(trace_class_ptr) | |
99 | user_listener(trace_class) | |
100 | ||
101 | ||
102 | class TraceClass(object._SharedObject, collections.abc.Mapping): | |
103 | _get_ref = staticmethod(native_bt.trace_class_get_ref) | |
104 | _put_ref = staticmethod(native_bt.trace_class_put_ref) | |
105 | ||
106 | @property | |
107 | def uuid(self): | |
108 | uuid_bytes = native_bt.trace_class_get_uuid(self._ptr) | |
109 | if uuid_bytes is None: | |
110 | return | |
111 | ||
112 | return uuidp.UUID(bytes=uuid_bytes) | |
113 | ||
114 | def _uuid(self, uuid): | |
115 | utils._check_type(uuid, uuidp.UUID) | |
116 | native_bt.trace_class_set_uuid(self._ptr, uuid.bytes) | |
117 | ||
118 | _uuid = property(fset=_uuid) | |
119 | ||
f377a958 SM |
120 | # Instantiate a trace of this class. |
121 | ||
122 | def __call__(self, name=None): | |
123 | trace_ptr = native_bt.trace_create(self._ptr) | |
124 | ||
125 | if trace_ptr is None: | |
126 | raise bt2.CreationError('cannot create trace class object') | |
127 | ||
128 | trace = bt2.trace.Trace._create_from_ptr(trace_ptr) | |
129 | ||
130 | if name is not None: | |
131 | trace._name = name | |
132 | ||
133 | return trace | |
134 | ||
0bee8ea9 SM |
135 | # Number of stream classes in this trace class. |
136 | ||
137 | def __len__(self): | |
138 | count = native_bt.trace_class_get_stream_class_count(self._ptr) | |
139 | assert count >= 0 | |
140 | return count | |
141 | ||
142 | # Get a stream class by stream id. | |
143 | ||
144 | def __getitem__(self, key): | |
145 | utils._check_uint64(key) | |
146 | ||
147 | sc_ptr = native_bt.trace_class_borrow_stream_class_by_id_const(self._ptr, key) | |
148 | if sc_ptr is None: | |
149 | raise KeyError(key) | |
150 | ||
151 | return bt2.StreamClass._create_from_ptr_and_get_ref(sc_ptr) | |
152 | ||
153 | def __iter__(self): | |
154 | for idx in range(len(self)): | |
155 | sc_ptr = native_bt.trace_class_borrow_stream_class_by_index_const(self._ptr, idx) | |
156 | assert sc_ptr is not None | |
157 | ||
158 | id = native_bt.stream_class_get_id(sc_ptr) | |
159 | assert id >= 0 | |
160 | ||
161 | yield id | |
162 | ||
163 | @property | |
164 | def env(self): | |
165 | return _TraceClassEnv(self) | |
166 | ||
f377a958 | 167 | def create_stream_class(self, id=None, |
060aee52 SM |
168 | name=None, |
169 | packet_context_field_class=None, | |
170 | event_common_context_field_class=None, | |
171 | default_clock_class=None, | |
172 | assigns_automatic_event_class_id=True, | |
173 | assigns_automatic_stream_id=True, | |
174 | packets_have_default_beginning_clock_snapshot=False, | |
175 | packets_have_default_end_clock_snapshot=False): | |
0bee8ea9 SM |
176 | |
177 | if self.assigns_automatic_stream_class_id: | |
178 | if id is not None: | |
179 | raise bt2.CreationError('id provided, but trace class assigns automatic stream class ids') | |
180 | ||
181 | sc_ptr = native_bt.stream_class_create(self._ptr) | |
182 | else: | |
183 | if id is None: | |
184 | raise bt2.CreationError('id not provided, but trace class does not assign automatic stream class ids') | |
185 | ||
186 | utils._check_uint64(id) | |
187 | sc_ptr = native_bt.stream_class_create_with_id(self._ptr, id) | |
188 | ||
f377a958 SM |
189 | sc = bt2.stream_class.StreamClass._create_from_ptr(sc_ptr) |
190 | ||
060aee52 SM |
191 | if name is not None: |
192 | sc._name = name | |
193 | ||
194 | if packet_context_field_class is not None: | |
195 | sc._packet_context_field_class = packet_context_field_class | |
196 | ||
197 | if event_common_context_field_class is not None: | |
198 | sc._event_common_context_field_class = event_common_context_field_class | |
199 | ||
200 | if default_clock_class is not None: | |
201 | sc._default_clock_class = default_clock_class | |
202 | ||
203 | sc._assigns_automatic_event_class_id = assigns_automatic_event_class_id | |
f377a958 | 204 | sc._assigns_automatic_stream_id = assigns_automatic_stream_id |
060aee52 SM |
205 | sc._packets_have_default_beginning_clock_snapshot = packets_have_default_beginning_clock_snapshot |
206 | sc._packets_have_default_end_clock_snapshot = packets_have_default_end_clock_snapshot | |
f377a958 SM |
207 | |
208 | return sc | |
0bee8ea9 SM |
209 | |
210 | @property | |
211 | def assigns_automatic_stream_class_id(self): | |
212 | return native_bt.trace_class_assigns_automatic_stream_class_id(self._ptr) | |
213 | ||
214 | def _assigns_automatic_stream_class_id(self, auto_id): | |
215 | utils._check_bool(auto_id) | |
216 | return native_bt.trace_class_set_assigns_automatic_stream_class_id(self._ptr, auto_id) | |
217 | ||
218 | _assigns_automatic_stream_class_id = property(fset=_assigns_automatic_stream_class_id) | |
219 | ||
060aee52 SM |
220 | # Field class creation methods. |
221 | ||
222 | def _check_create_status(self, ptr, type_name): | |
223 | if ptr is None: | |
224 | raise bt2.CreationError( | |
225 | 'cannot create {} field class'.format(type_name)) | |
226 | ||
a728f6c3 SM |
227 | def _create_integer_field_class(self, create_func, py_cls, type_name, range, display_base): |
228 | field_class_ptr = create_func(self._ptr) | |
229 | self._check_create_status(field_class_ptr, type_name) | |
230 | ||
231 | field_class = py_cls._create_from_ptr(field_class_ptr) | |
232 | ||
233 | if range is not None: | |
234 | field_class._range = range | |
235 | ||
236 | if display_base is not None: | |
237 | field_class._display_base = display_base | |
238 | ||
239 | return field_class | |
240 | ||
241 | def create_signed_integer_field_class(self, range=None, display_base=None): | |
242 | return self._create_integer_field_class(native_bt.field_class_signed_integer_create, | |
243 | bt2.field_class.SignedIntegerFieldClass, | |
244 | 'signed integer', range, display_base) | |
245 | ||
27d97a3f SM |
246 | def create_unsigned_integer_field_class(self, range=None, display_base=None): |
247 | return self._create_integer_field_class(native_bt.field_class_unsigned_integer_create, | |
248 | bt2.field_class.UnsignedIntegerFieldClass, | |
249 | 'unsigned integer', range, display_base) | |
250 | ||
251 | def create_real_field_class(self, is_single_precision=False): | |
252 | field_class_ptr = native_bt.field_class_real_create(self._ptr) | |
253 | self._check_create_status(field_class_ptr, 'real') | |
254 | ||
255 | field_class = bt2.field_class.RealFieldClass._create_from_ptr(field_class_ptr) | |
256 | ||
257 | field_class._single_precision = is_single_precision | |
258 | ||
259 | return field_class | |
260 | ||
060aee52 SM |
261 | def create_structure_field_class(self): |
262 | field_class_ptr = native_bt.field_class_structure_create(self._ptr) | |
263 | self._check_create_status(field_class_ptr, 'structure') | |
264 | ||
265 | return bt2.field_class._StructureFieldClass._create_from_ptr(field_class_ptr) | |
266 | ||
267 | def create_string_field_class(self): | |
268 | field_class_ptr = native_bt.field_class_string_create(self._ptr) | |
269 | self._check_create_status(field_class_ptr, 'string') | |
270 | ||
271 | return bt2.field_class.StringFieldClass._create_from_ptr(field_class_ptr) | |
272 | ||
0bee8ea9 SM |
273 | # Add a listener to be called when the trace class is destroyed. |
274 | ||
275 | def add_destruction_listener(self, listener): | |
276 | ||
277 | if not callable(listener): | |
278 | raise TypeError("'listener' parameter is not callable") | |
279 | ||
280 | fn = native_bt.py3_trace_class_add_destruction_listener | |
281 | listener_from_native = functools.partial(_trace_class_destruction_listener_from_native, | |
282 | listener) | |
283 | ||
284 | listener_id = fn(self._ptr, listener_from_native) | |
285 | if listener_id is None: | |
286 | utils._raise_bt2_error('cannot add destruction listener to trace class object') | |
287 | ||
288 | return bt2._ListenerHandle(listener_id, self) |