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#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*/
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