// (C) Copyright 2005-2007 Matthias Troyer
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// Use, modification and distribution is subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// Authors: Matthias Troyer
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#ifndef BOOST_MPI_BINARY_BUFFER_OPRIMITIVE_HPP
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#define BOOST_MPI_BINARY_BUFFER_OPRIMITIVE_HPP
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#include <mpi.h>
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#include <iostream>
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#include <cstddef> // size_t
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#include <boost/config.hpp>
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#include <boost/serialization/array.hpp>
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#include <boost/serialization/is_bitwise_serializable.hpp>
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#include <boost/assert.hpp>
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#include <boost/mpl/assert.hpp>
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#include <vector>
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#include <boost/mpi/allocator.hpp>
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#include <boost/mpl/always.hpp>
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#include <boost/type_traits/remove_const.hpp>
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namespace boost { namespace mpi {
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/// serialization using binary copy into a buffer
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class BOOST_MPI_DECL binary_buffer_oprimitive
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{
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public:
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/// the type of the buffer into which the data is packed upon serialization
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typedef std::vector<char, allocator<char> > buffer_type;
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binary_buffer_oprimitive(buffer_type & b, MPI_Comm const &)
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: buffer_(b)
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{
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}
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void const * address() const
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{
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return detail::c_data(buffer_);
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}
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const std::size_t& size() const
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{
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return size_ = buffer_.size();
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}
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const std::size_t* size_ptr() const
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{
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return &size();
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}
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void save_binary(void const *address, std::size_t count)
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{
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save_impl(address,count);
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}
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// fast saving of arrays
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template<class T>
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void save_array(serialization::array_wrapper<T> const& x, unsigned int /* file_version */)
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{
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BOOST_MPL_ASSERT((serialization::is_bitwise_serializable<BOOST_DEDUCED_TYPENAME remove_const<T>::type>));
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if (x.count())
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save_impl(x.address(), x.count()*sizeof(T));
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}
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template<class T>
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void save(serialization::array_wrapper<T> const& x)
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{
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save_array(x,0u);
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}
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typedef serialization::is_bitwise_serializable<mpl::_1> use_array_optimization;
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// default saving of primitives.
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template<class T>
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void save(const T & t)
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{
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BOOST_MPL_ASSERT((serialization::is_bitwise_serializable<BOOST_DEDUCED_TYPENAME remove_const<T>::type>));
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save_impl(&t, sizeof(T));
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}
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template<class CharType>
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void save(const std::basic_string<CharType> &s)
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{
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unsigned int l = static_cast<unsigned int>(s.size());
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save(l);
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save_impl(s.data(),s.size());
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}
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private:
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void save_impl(void const * p, int l)
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{
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char const* ptr = reinterpret_cast<char const*>(p);
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buffer_.insert(buffer_.end(),ptr,ptr+l);
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}
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buffer_type& buffer_;
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mutable std::size_t size_;
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};
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} } // end namespace boost::mpi
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#endif // BOOST_MPI_BINARY_BUFFER_OPRIMITIVE_HPP
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