e2ecdcfe33
Former-commit-id:a02aeb236c[formerly9f19e3f712] [formerlya02aeb236c[formerly9f19e3f712] [formerly06a8b51d6d[formerly 64fa9254b946eae7e61bbc3f513b7c3696c4f54f]]] Former-commit-id:06a8b51d6dFormer-commit-id:8e80217e59[formerly3360eb6c5f] Former-commit-id:377dcd10b9
68 lines
2.2 KiB
C++
68 lines
2.2 KiB
C++
#ifndef QPID_INLINEVECTOR_H
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#define QPID_INLINEVECTOR_H
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/*
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*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*
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*/
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#include "qpid/InlineAllocator.h"
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#include <vector>
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namespace qpid {
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/**
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* A vector that stores up to Max elements in inline storage,
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* otherwise uses normal vector allocation.
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*
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* NOTE: depends on some non-standard but highly probably assumptions
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* about how std::vector uses its allocator, they are true for g++.
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* - default constructor does not allocate.
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* - reserve(N) does not allocate more than N elements.
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* - vector never re-allocates when size() < capacity()
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*/
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template <class T, size_t Max, class Alloc=std::allocator<T> >
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class InlineVector : public std::vector<T, InlineAllocator<Alloc, Max> >
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{
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typedef std::vector<T, InlineAllocator<Alloc, Max> > Base;
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public:
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typedef typename Base::allocator_type allocator_type;
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typedef typename Base::value_type value_type;
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typedef typename Base::size_type size_type;
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explicit InlineVector(const allocator_type& a=allocator_type()) : Base(a) {
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this->reserve(Max);
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}
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explicit InlineVector(size_type n, const value_type& x = value_type(),
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const allocator_type& a=allocator_type()) : Base(a)
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{
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this->reserve(std::max(n, Max));
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this->insert(this->end(), n, x);
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}
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InlineVector(const InlineVector& x) : Base() {
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this->reserve(std::max(x.size(), Max));
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*this = x;
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}
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};
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} // namespace qpid
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#endif /*!QPID_INLINEVECTOR_H*/
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