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