1 files changed, 63 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/RefCounted.h b/qpid/cpp/src/qpid/RefCounted.h
new file mode 100644
index 0000000000..f9e0107103
--- /dev/null
+++ b/qpid/cpp/src/qpid/RefCounted.h
@@ -0,0 +1,63 @@
+#ifndef QPID_REFCOUNTED_H
+#define QPID_REFCOUNTED_H
+
+/*
+ *
+ * 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.
+ *
+ */
+
+#include <boost/utility.hpp>
+#include <boost/detail/atomic_count.hpp>
+
+namespace qpid {
+
+/**
+ * Reference-counted base class.
+ * Note: this class isn't copyable - you must copy the intrusive_ptr that points
+ * to the class that has mixed this in not the class itself (as that would sidestep
+ * the reference counting)
+ */
+class RefCounted : boost::noncopyable {
+    mutable boost::detail::atomic_count count;
+
+public:
+    RefCounted() : count(0) {}
+    void addRef() const { ++count; }
+    void release() const { if (--count==0) released(); }
+    long refCount() { return count; }
+
+protected:
+    virtual ~RefCounted() {};
+    // Allow subclasses to over-ride behavior when refcount reaches 0.
+    virtual void released() const { delete this; }
+};
+
+
+} // namespace qpid
+
+// intrusive_ptr support.
+namespace boost {
+template <typename T>
+inline void intrusive_ptr_add_ref(const T* p) { p->qpid::RefCounted::addRef(); }
+template <typename T>
+inline void intrusive_ptr_release(const T* p) { p->qpid::RefCounted::release(); }
+}
+
+
+#endif  /*!QPID_REFCOUNTED_H*/