Chris@16: // (C) Copyright 2005-2007 Matthias Troyer
Chris@16: 
Chris@16: // Use, modification and distribution is subject to the Boost Software
Chris@16: // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: //  Authors: Matthias Troyer
Chris@16: 
Chris@16: #ifndef BOOST_MPI_BINARY_BUFFER_OPRIMITIVE_HPP
Chris@16: #define BOOST_MPI_BINARY_BUFFER_OPRIMITIVE_HPP
Chris@16: 
Chris@16: #include <mpi.h>
Chris@16: #include <iostream>
Chris@16: #include <cstddef> // size_t
Chris@16: #include <boost/config.hpp>
Chris@16: 
Chris@16: #include <boost/serialization/array.hpp>
Chris@16: #include <boost/serialization/is_bitwise_serializable.hpp>
Chris@16: #include <boost/assert.hpp>
Chris@16: #include <boost/mpl/assert.hpp>
Chris@16: #include <vector>
Chris@16: #include <boost/mpi/allocator.hpp>
Chris@16: #include <boost/mpl/always.hpp>
Chris@16: #include <boost/type_traits/remove_const.hpp>
Chris@16: 
Chris@16: namespace boost { namespace mpi {
Chris@16: 
Chris@16: /// serialization using binary copy into a buffer
Chris@16: 
Chris@16: class BOOST_MPI_DECL binary_buffer_oprimitive
Chris@16: {
Chris@16: public:
Chris@16:     /// the type of the buffer into which the data is packed upon serialization
Chris@16:     typedef std::vector<char, allocator<char> > buffer_type;
Chris@16: 
Chris@16:     binary_buffer_oprimitive(buffer_type & b, MPI_Comm const &)
Chris@16:      : buffer_(b)
Chris@16:     {
Chris@16:     }
Chris@16: 
Chris@16:     void const * address() const
Chris@16:     {
Chris@16:       return &buffer_.front();
Chris@16:     }
Chris@16: 
Chris@16:     const std::size_t& size() const
Chris@16:     {
Chris@16:       return size_ = buffer_.size();
Chris@16:     }
Chris@16: 
Chris@16:     void save_binary(void const *address, std::size_t count)
Chris@16:     {
Chris@16:       save_impl(address,count);
Chris@16:     }
Chris@16: 
Chris@16:     // fast saving of arrays
Chris@16:     template<class T>
Chris@16:     void save_array(serialization::array<T> const& x, unsigned int /* file_version */)
Chris@16:     {
Chris@16:     
Chris@16:       BOOST_MPL_ASSERT((serialization::is_bitwise_serializable<BOOST_DEDUCED_TYPENAME remove_const<T>::type>));
Chris@16:       if (x.count())
Chris@16:         save_impl(x.address(), x.count()*sizeof(T));
Chris@16:     }
Chris@16: 
Chris@16:     template<class T>
Chris@16:     void save(serialization::array<T> const& x)
Chris@16:     {
Chris@16:       save_array(x,0u);
Chris@16:     }
Chris@16: 
Chris@16:     typedef serialization::is_bitwise_serializable<mpl::_1> use_array_optimization;
Chris@16: 
Chris@16:     // default saving of primitives.
Chris@16:     template<class T>
Chris@16:     void save(const T & t)
Chris@16:     {
Chris@16:       BOOST_MPL_ASSERT((serialization::is_bitwise_serializable<BOOST_DEDUCED_TYPENAME remove_const<T>::type>));
Chris@16:       save_impl(&t, sizeof(T));
Chris@16:     }
Chris@16: 
Chris@16:     template<class CharType>
Chris@16:     void save(const std::basic_string<CharType> &s)
Chris@16:     {
Chris@16:       unsigned int l = static_cast<unsigned int>(s.size());
Chris@16:       save(l);
Chris@16:       save_impl(s.data(),s.size());
Chris@16:     }
Chris@16: 
Chris@16: private:
Chris@16: 
Chris@16:     void save_impl(void const * p, int l)
Chris@16:     {
Chris@16:       char const* ptr = reinterpret_cast<char const*>(p);
Chris@16:       buffer_.insert(buffer_.end(),ptr,ptr+l);
Chris@16:     }
Chris@16: 
Chris@16:   buffer_type& buffer_;
Chris@16:   mutable std::size_t size_;
Chris@16: };
Chris@16: 
Chris@16: } } // end namespace boost::mpi
Chris@16: 
Chris@16: #endif // BOOST_MPI_BINARY_BUFFER_OPRIMITIVE_HPP