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121 lines
3.0 KiB
121 lines
3.0 KiB
// (C) Copyright 2005-2007 Matthias Troyer |
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// Use, modification and distribution is subject to the Boost Software |
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// Authors: Matthias Troyer |
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#ifndef BOOST_MPI_BINARY_BUFFER_IPRIMITIVE_HPP |
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#define BOOST_MPI_BINARY_BUFFER_IPRIMITIVE_HPP |
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#include <mpi.h> |
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#include <iostream> |
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#include <cstddef> // size_t |
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#include <boost/config.hpp> |
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#include <boost/mpi/exception.hpp> |
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#include <boost/assert.hpp> |
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#include <boost/mpl/assert.hpp> |
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#include <boost/serialization/array.hpp> |
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#include <boost/serialization/is_bitwise_serializable.hpp> |
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#include <vector> |
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#include <boost/mpi/allocator.hpp> |
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#include <cstring> // for memcpy |
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namespace boost { namespace mpi { |
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/// deserialization using MPI_Unpack |
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class BOOST_MPI_DECL binary_buffer_iprimitive |
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{ |
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public: |
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/// the type of the buffer from which the data is unpacked upon deserialization |
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typedef std::vector<char, allocator<char> > buffer_type; |
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binary_buffer_iprimitive(buffer_type & b, MPI_Comm const &, int position = 0) |
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: buffer_(b), |
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position(position) |
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{ |
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} |
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void* address () |
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{ |
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return &buffer_.front(); |
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} |
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void const* address () const |
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{ |
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return &buffer_.front(); |
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} |
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const std::size_t& size() const |
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{ |
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return size_ = buffer_.size(); |
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} |
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void resize(std::size_t s) |
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{ |
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buffer_.resize(s); |
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} |
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void load_binary(void *address, std::size_t count) |
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{ |
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load_impl(address,count); |
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} |
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// fast saving of arrays of fundamental types |
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template<class T> |
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void load_array(serialization::array<T> const& x, unsigned int /* file_version */) |
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{ |
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BOOST_MPL_ASSERT((serialization::is_bitwise_serializable<BOOST_DEDUCED_TYPENAME remove_const<T>::type>)); |
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if (x.count()) |
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load_impl(x.address(), sizeof(T)*x.count()); |
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} |
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typedef serialization::is_bitwise_serializable<mpl::_1> use_array_optimization; |
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template<class T> |
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void load(serialization::array<T> const& x) |
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{ |
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load_array(x,0u); |
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} |
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// default saving of primitives. |
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template<class T> |
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void load( T & t) |
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{ |
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BOOST_MPL_ASSERT((serialization::is_bitwise_serializable<BOOST_DEDUCED_TYPENAME remove_const<T>::type>)); |
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load_impl(&t, sizeof(T)); |
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} |
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template<class CharType> |
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void load(std::basic_string<CharType> & s) |
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{ |
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unsigned int l; |
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load(l); |
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// borland de-allocator fixup |
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#if BOOST_WORKAROUND(_RWSTD_VER, BOOST_TESTED_AT(20101)) |
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if(NULL != s.data()) |
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#endif |
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s.resize(l); |
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// note breaking a rule here - could be a problem on some platform |
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load_impl(const_cast<char *>(s.data()),l); |
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} |
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private: |
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void load_impl(void * p, int l) |
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{ |
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assert(position+l<=static_cast<int>(buffer_.size())); |
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std::memcpy(p,&buffer_[position],l); |
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position += l; |
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} |
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buffer_type & buffer_; |
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mutable std::size_t size_; |
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int position; |
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}; |
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} } // end namespace boost::mpi |
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#endif // BOOST_MPI_PACKED_IPRIMITIVE_HPP
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