122 lines
3.0 KiB
C++
122 lines
3.0 KiB
C++
|
// (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_IPRIMITIVE_HPP
|
||
|
|
#define BOOST_MPI_BINARY_BUFFER_IPRIMITIVE_HPP
|
||
|
|
|
||
|
|
#include <mpi.h>
|
||
|
|
#include <iostream>
|
||
|
|
#include <cstddef> // size_t
|
||
|
|
#include <boost/config.hpp>
|
||
|
|
#include <boost/mpi/exception.hpp>
|
||
|
|
#include <boost/assert.hpp>
|
||
|
|
#include <boost/mpl/assert.hpp>
|
||
|
|
#include <boost/serialization/array.hpp>
|
||
|
|
#include <boost/serialization/is_bitwise_serializable.hpp>
|
||
|
|
#include <vector>
|
||
|
|
#include <boost/mpi/allocator.hpp>
|
||
|
|
#include <cstring> // for memcpy
|
||
|
|
|
||
|
|
namespace boost { namespace mpi {
|
||
|
|
|
||
|
|
/// deserialization using MPI_Unpack
|
||
|
|
|
||
|
|
class BOOST_MPI_DECL binary_buffer_iprimitive
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
/// the type of the buffer from which the data is unpacked upon deserialization
|
||
|
|
typedef std::vector<char, allocator<char> > buffer_type;
|
||
|
|
|
||
|
|
binary_buffer_iprimitive(buffer_type & b, MPI_Comm const &, int position = 0)
|
||
|
|
: buffer_(b),
|
||
|
|
position(position)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
void* address ()
|
||
|
|
{
|
||
|
|
return &buffer_.front();
|
||
|
|
}
|
||
|
|
|
||
|
|
void const* address () const
|
||
|
|
{
|
||
|
|
return &buffer_.front();
|
||
|
|
}
|
||
|
|
|
||
|
|
const std::size_t& size() const
|
||
|
|
{
|
||
|
|
return size_ = buffer_.size();
|
||
|
|
}
|
||
|
|
|
||
|
|
void resize(std::size_t s)
|
||
|
|
{
|
||
|
|
buffer_.resize(s);
|
||
|
|
}
|
||
|
|
|
||
|
|
void load_binary(void *address, std::size_t count)
|
||
|
|
{
|
||
|
|
load_impl(address,count);
|
||
|
|
}
|
||
|
|
|
||
|
|
// fast saving of arrays of fundamental types
|
||
|
|
template<class T>
|
||
|
|
void load_array(serialization::array<T> const& x, unsigned int /* file_version */)
|
||
|
|
{
|
||
|
|
BOOST_MPL_ASSERT((serialization::is_bitwise_serializable<BOOST_DEDUCED_TYPENAME remove_const<T>::type>));
|
||
|
|
if (x.count())
|
||
|
|
load_impl(x.address(), sizeof(T)*x.count());
|
||
|
|
}
|
||
|
|
|
||
|
|
typedef serialization::is_bitwise_serializable<mpl::_1> use_array_optimization;
|
||
|
|
|
||
|
|
template<class T>
|
||
|
|
void load(serialization::array<T> const& x)
|
||
|
|
{
|
||
|
|
load_array(x,0u);
|
||
|
|
}
|
||
|
|
|
||
|
|
// default saving of primitives.
|
||
|
|
template<class T>
|
||
|
|
void load( T & t)
|
||
|
|
{
|
||
|
|
BOOST_MPL_ASSERT((serialization::is_bitwise_serializable<BOOST_DEDUCED_TYPENAME remove_const<T>::type>));
|
||
|
|
load_impl(&t, sizeof(T));
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class CharType>
|
||
|
|
void load(std::basic_string<CharType> & s)
|
||
|
|
{
|
||
|
|
unsigned int l;
|
||
|
|
load(l);
|
||
|
|
// borland de-allocator fixup
|
||
|
|
#if BOOST_WORKAROUND(_RWSTD_VER, BOOST_TESTED_AT(20101))
|
||
|
|
if(NULL != s.data())
|
||
|
|
#endif
|
||
|
|
s.resize(l);
|
||
|
|
// note breaking a rule here - could be a problem on some platform
|
||
|
|
load_impl(const_cast<char *>(s.data()),l);
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
|
||
|
|
void load_impl(void * p, int l)
|
||
|
|
{
|
||
|
|
assert(position+l<=static_cast<int>(buffer_.size()));
|
||
|
|
std::memcpy(p,&buffer_[position],l);
|
||
|
|
position += l;
|
||
|
|
}
|
||
|
|
|
||
|
|
buffer_type & buffer_;
|
||
|
|
mutable std::size_t size_;
|
||
|
|
int position;
|
||
|
|
};
|
||
|
|
|
||
|
|
} } // end namespace boost::mpi
|
||
|
|
|
||
|
|
#endif // BOOST_MPI_PACKED_IPRIMITIVE_HPP
|