// (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 |