97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
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/*
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open source routing machine
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Copyright (C) Dennis Luxen, others 2010
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU AFFERO General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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or see http://www.gnu.org/licenses/agpl.txt.
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*/
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#ifndef SHARED_MEMORY_VECTOR_WRAPPER_H
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#define SHARED_MEMORY_VECTOR_WRAPPER_H
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#include <boost/assert.hpp>
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#include <boost/shared_ptr.hpp>
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#include <boost/type_traits.hpp>
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#include <iterator>
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#include <vector>
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template<typename DataT>
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class ShMemIterator : public std::iterator<std::input_iterator_tag, DataT> {
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boost::shared_ptr<DataT> p;
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public:
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ShMemIterator(boost::shared_ptr<DataT> & x) :p(x) {}
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ShMemIterator(const ShMemIterator & mit) : p(mit.p) {}
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ShMemIterator& operator++() {
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++p;
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return *this;
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}
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ShMemIterator operator++(int) {
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ShMemIterator tmp(*this);
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operator++();
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return tmp;
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}
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bool operator==(const ShMemIterator& rhs) {
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return p==rhs.p;
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}
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bool operator!=(const ShMemIterator& rhs) {
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return p!=rhs.p;
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}
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DataT& operator*() {
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return *p;
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}
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};
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template<typename DataT>
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class SharedMemoryWrapper {
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private:
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boost::shared_ptr<DataT> m_ptr;
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std::size_t m_size;
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SharedMemoryWrapper() {};
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public:
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SharedMemoryWrapper(const DataT * ptr, std::size_t size) :
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m_ptr(ptr),
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m_size(size)
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{ }
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ShMemIterator<DataT> begin() const {
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return ShMemIterator<DataT>(m_ptr);
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}
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ShMemIterator<DataT> end() const {
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return ShMemIterator<DataT>(m_ptr+m_size);
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}
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std::size_t size() const { return m_size; }
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DataT & operator[](const int index) {
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BOOST_ASSERT_MSG(index < m_size, "invalid size");
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return m_ptr[index];
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}
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};
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template<typename DataT, bool SharedMemory = false>
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class ShMemVector : public
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boost::conditional<
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SharedMemory,
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SharedMemoryWrapper<DataT>,
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std::vector<DataT>
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>::type
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{ };
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#endif //SHARED_MEMORY_VECTOR_WRAPPER_H
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