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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.
+ */
+
+#ifndef REF_COUNTING_OBJECT_H
+#define REF_COUNTING_OBJECT_H
+
+#include <iostream>
+#include <list>
+
+#include "apache/das/RefCountingPointer.h"
+
+namespace apache {
+ namespace das {
+
+/**
+ * RefcountingObject is the base class for all objects in SDO
+ * These objects keep a count of references to themselves, then
+ * free themselves when they are unused.
+ */
+template <class T>
+ class RefCountingObject
+ {
+
+ public:
+ RefCountingObject();
+ RefCountingObject(const RefCountingObject<T>& rc);
+ T& operator=(const T& rc);
+ virtual ~RefCountingObject();
+/**
+ * Add to the reference count - a new pointer has been created.
+ */
+ void addRef(RefCountingPointer<T>* refPtr);
+/**
+ * Subtract from the the reference count - a reference has dropped.
+ */
+ virtual void releaseRef(RefCountingPointer<T>* refPtr);
+
+/**
+ * Print contents to stream
+ */
+ virtual std::ostream& printSelf(std::ostream &os);
+
+ protected:
+ virtual void free(void);
+
+ private:
+ bool freed;
+ unsigned int refCount;
+ std::list<RefCountingPointer<T>*>* refPtrs;
+
+ };
+
+ };
+};
+
+
+#endif //REF_COUNTING_OBJECT_H