bindings/python/bt2/stream.py

   1 # The MIT License (MIT)
   2 #
   3 # Copyright (c) 2016-2017 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
  24 import bt2.packet
  25 import bt2.event
  26 import abc
  27 import bt2
  28
  29
  30 def _create_from_ptr(stream_ptr):
  31     if native_bt.ctf_stream_is_writer(stream_ptr):
  32         import ctf_writer
  33
  34         cls = ctf_writer._CtfWriterStream
  35     else:
  36         cls = _Stream
  37
  38     return cls._create_from_ptr(stream_ptr)
  39
  40
  41 class _StreamBase(object._Object):
  42     @property
  43     def stream_class(self):
  44         stream_class_ptr = native_bt.ctf_stream_get_class(self._ptr)
  45         utils._handle_ptr(stream_class_ptr, "cannot get stream object's stream class object")
  46         return bt2.StreamClass._create_from_ptr(stream_class_ptr)
  47
  48     @property
  49     def name(self):
  50         return native_bt.ctf_stream_get_name(self._ptr)
  51
  52     def __eq__(self, other):
  53         if self.addr == other.addr:
  54             return True
  55
  56         return self.name == other.name
  57
  58
  59 class _Stream(_StreamBase):
  60     def create_packet(self):
  61         packet_ptr = native_bt.ctf_packet_create(self._ptr)
  62
  63         if packet_ptr is None:
  64             raise bt2.CreationError('cannot create packet object')
  65
  66         return bt2.packet._Packet._create_from_ptr(packet_ptr)
  67
  68     def __eq__(self, other):
  69         if type(other) is not type(self):
  70             return False
  71
  72         return _StreamBase.__eq__(self, other)
  73
  74     def _copy(self):
  75         return self.stream_class(self.name)
  76
  77     def __copy__(self):
  78         return self._copy()
  79
  80     def __deepcopy__(self, memo):
  81         cpy = self._copy()
  82         memo[id(self)] = cpy
  83         return cpy