| // (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 |