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#ifndef QPID_BUFFERREF_H
#define QPID_BUFFERREF_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 "qpid/RefCounted.h"
#include <boost/intrusive_ptr.hpp>
namespace qpid {
/** Template for mutable or const buffer references */
template <class T> class BufferRefT {
public:
BufferRefT() : begin_(0), end_(0) {}
BufferRefT(boost::intrusive_ptr<RefCounted> c, T* begin, T* end) :
counter(c), begin_(begin), end_(end) {}
template <class U> BufferRefT(const BufferRefT<U>& other) :
counter(other.counter), begin_(other.begin_), end_(other.end_) {}
T* begin() const { return begin_; }
T* end() const { return end_; }
/** Return a sub-buffer of the current buffer */
BufferRefT sub_buffer(T* begin, T* end) {
assert(begin_ <= begin && begin <= end_);
assert(begin_ <= end && end <= end_);
assert(begin <= end);
return BufferRefT(counter, begin, end);
}
private:
boost::intrusive_ptr<RefCounted> counter;
T* begin_;
T* end_;
};
/**
* Reference to a mutable ref-counted buffer.
*/
typedef BufferRefT<char> BufferRef;
/**
* Reference to a const ref-counted buffer.
*/
typedef BufferRefT<const char> ConstBufferRef;
} // namespace qpid
#endif /*!QPID_BUFFERREF_H*/
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