Initial commit moving openolt adapter from voltha-go to the new repo.
This version works with ponsim rather than openolt, this is temporary.
It is currently being fixed to work with openolt.
Change-Id: I34a800c98f050140b367e2d474b7aa8b79f34b9a
Signed-off-by: William Kurkian <wkurkian@cisco.com>
diff --git a/python/common/utils/ordered_weakvalue_dict.py b/python/common/utils/ordered_weakvalue_dict.py
new file mode 100644
index 0000000..9ea739a
--- /dev/null
+++ b/python/common/utils/ordered_weakvalue_dict.py
@@ -0,0 +1,48 @@
+#
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from _weakref import ref
+from weakref import KeyedRef
+from collections import OrderedDict
+
+
+class OrderedWeakValueDict(OrderedDict):
+ """
+ Modified OrderedDict to use weak references as values. Entries disappear
+ automatically if the referred value has no more strong reference pointing
+ ot it.
+
+ Warning, this is not a complete implementation, only what is needed for
+ now. See test_ordered_wealvalue_dict.py to see what is tested behavior.
+ """
+ def __init__(self, *args, **kw):
+ def remove(wr, selfref=ref(self)):
+ self = selfref()
+ if self is not None:
+ super(OrderedWeakValueDict, self).__delitem__(wr.key)
+ self._remove = remove
+ super(OrderedWeakValueDict, self).__init__(*args, **kw)
+
+ def __setitem__(self, key, value):
+ super(OrderedWeakValueDict, self).__setitem__(
+ key, KeyedRef(value, self._remove, key))
+
+ def __getitem__(self, key):
+ o = super(OrderedWeakValueDict, self).__getitem__(key)()
+ if o is None:
+ raise KeyError, key
+ else:
+ return o
+