comparison DEPENDENCIES/generic/include/boost/mpi/detail/packed_oprimitive.hpp @ 16:2665513ce2d3

Add boost headers

+// (C) Copyright 2005 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_PACKED_OPRIMITIVE_HPP
+#define BOOST_MPI_PACKED_OPRIMITIVE_HPP
+
+#include <boost/mpi/config.hpp>
+#include <cstddef> // size_t
+#include <boost/config.hpp>
+
+#include <boost/mpi/datatype.hpp>
+#include <boost/mpi/exception.hpp>
+#include <boost/serialization/detail/get_data.hpp>
+#include <boost/serialization/array.hpp>
+#include <boost/assert.hpp>
+#include <vector>
+#include <boost/mpi/allocator.hpp>
+
+namespace boost { namespace mpi {
+
+/// serialization using MPI::Pack
+
+class BOOST_MPI_DECL packed_oprimitive
+{
+public:
+    /// the type of the buffer into which the data is packed upon serialization
+    typedef std::vector<char, allocator<char> > buffer_type;
+
+    packed_oprimitive(buffer_type & b, MPI_Comm const & comm)
+         : buffer_(b),
+           comm(comm)
+        {
+        }
+
+    void const * address() const
+    {
+      return &buffer_[0];
+    }
+
+    const std::size_t& size() const
+    {
+      return size_ = buffer_.size();
+    }
+
+    void save_binary(void const *address, std::size_t count)
+        {
+          save_impl(address,MPI_BYTE,count);
+        }
+
+    // fast saving of arrays
+    template<class T>
+    void save_array(serialization::array<T> const& x, unsigned int /* file_version */)
+    {
+        if (x.count())
+          save_impl(x.address(), get_mpi_datatype(*x.address()), x.count());
+    }
+
+    typedef is_mpi_datatype<mpl::_1> use_array_optimization;
+
+#ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
+    friend class archive::save_access;
+protected:
+#else
+public:
+#endif
+
+    // default saving of primitives.
+    template<class T>
+    void save(const T & t)
+    {
+      save_impl(&t, get_mpi_datatype<T>(t), 1);
+    }
+
+    template<class CharType>
+    void save(const std::basic_string<CharType> &s)
+    {
+      unsigned int l = static_cast<unsigned int>(s.size());
+      save(l);
+      if (l)
+        save_impl(s.data(),get_mpi_datatype(CharType()),s.size());
+    }
+
+private:
+
+    void save_impl(void const * p, MPI_Datatype t, int l)
+    {
+      // allocate enough memory
+      int memory_needed;
+      BOOST_MPI_CHECK_RESULT(MPI_Pack_size,(l,t,comm,&memory_needed));
+
+      int position = buffer_.size();
+      buffer_.resize(position + memory_needed);
+
+      // pack the data into the buffer
+      BOOST_MPI_CHECK_RESULT(MPI_Pack,
+      (const_cast<void*>(p), l, t, boost::serialization::detail::get_data(buffer_), buffer_.size(), &position, comm));
+      // reduce the buffer size if needed
+      BOOST_ASSERT(std::size_t(position) <= buffer_.size());
+      if (std::size_t(position) < buffer_.size())
+          buffer_.resize(position);
+    }
+
+  buffer_type& buffer_;
+  mutable std::size_t size_;
+  MPI_Comm comm;
+};
+
+} } // end namespace boost::mpi
+
+#endif // BOOST_MPI_PACKED_OPRIMITIVE_HPP