--- /dev/null
+# The MIT License (MIT)
+#
+# Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+from bt2 import native_bt
+import abc
+
+
+class _Object:
+ def __init__(self, ptr):
+ self._ptr = ptr
+
+ @property
+ def addr(self):
+ return int(self._ptr)
+
+ @classmethod
+ def _create_from_ptr(cls, ptr):
+ obj = cls.__new__(cls)
+ obj._ptr = ptr
+ return obj
+
+ def _get(self):
+ native_bt.get(self._ptr)
+
+ def __del__(self):
+ ptr = getattr(self, '_ptr', None)
+ native_bt.put(ptr)
+ self._ptr = None
+
+ def __repr__(self):
+ return '<{}.{} object @ {}>'.format(self.__class__.__module__,
+ self.__class__.__name__,
+ hex(self.addr))
+
+
+class _PrivateObject:
+ def __del__(self):
+ pub_ptr = getattr(self, '_pub_ptr', None)
+ native_bt.put(pub_ptr)
+ self._pub_ptr = None
+ super().__del__()
+
+
+class _Freezable(metaclass=abc.ABCMeta):
+ @property
+ def is_frozen(self):
+ return self._is_frozen()
+
+ @property
+ def frozen(self):
+ return self.is_frozen
+
+ def freeze(self):
+ self._freeze()
+
+ @abc.abstractmethod
+ def _is_frozen(self):
+ pass
+
+ @abc.abstractmethod
+ def _freeze(self):
+ pass