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#ifndef QPID_INLINEVECTOR_H
#define QPID_INLINEVECTOR_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/InlineAllocator.h"
#include <vector>
namespace qpid {
/**
* A vector that stores up to Max elements in inline storage,
* otherwise uses normal vector allocation.
*
* NOTE: depends on some non-standard but highly probably assumptions
* about how std::vector uses its allocator, they are true for g++.
* - default constructor does not allocate.
* - reserve(N) does not allocate more than N elements.
* - vector never re-allocates when size() < capacity()
*/
template <class T, size_t Max, class Alloc=std::allocator<T> >
class InlineVector : public std::vector<T, InlineAllocator<Alloc, Max> >
{
typedef std::vector<T, InlineAllocator<Alloc, Max> > Base;
public:
typedef typename Base::allocator_type allocator_type;
typedef typename Base::value_type value_type;
typedef typename Base::size_type size_type;
explicit InlineVector(const allocator_type& a=allocator_type()) : Base(a) {
this->reserve(Max);
}
explicit InlineVector(size_type n, const value_type& x = value_type(),
const allocator_type& a=allocator_type()) : Base(a)
{
this->reserve(std::max(n, Max));
this->insert(this->end(), n, x);
}
InlineVector(const InlineVector& x) : Base() {
this->reserve(std::max(x.size(), Max));
*this = x;
}
};
} // namespace qpid
#endif /*!QPID_INLINEVECTOR_H*/
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