ceph/src/boost/boost/property_map/parallel/unsafe_serialize.hpp

   1 // Copyright (C) 2006 The Trustees of Indiana University.
   2
   3 // Use, modification and distribution is subject to the Boost Software
   4 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   5 // http://www.boost.org/LICENSE_1_0.txt)
   6
   7 //  Authors: Douglas Gregor
   8 //           Andrew Lumsdaine
   9
  10 // This file contains the "unsafe_serialize" routine, which transforms
  11 // types they may not be serializable (such as void*) into
  12 // serializable equivalents.
  13 #ifndef BOOST_PROPERTY_MAP_UNSAFE_SERIALIZE_HPP
  14 #define BOOST_PROPERTY_MAP_UNSAFE_SERIALIZE_HPP
  15
  16 #include <boost/mpi/datatype.hpp>
  17 #include <boost/serialization/is_bitwise_serializable.hpp>
  18 #include <boost/mpl/bool.hpp>
  19 #include <boost/mpl/if.hpp>
  20 #include <boost/cstdint.hpp>
  21 #include <boost/static_assert.hpp>
  22 #include <boost/type_traits.hpp>
  23 #include <utility>
  24
  25 BOOST_IS_BITWISE_SERIALIZABLE(void*)
  26 namespace boost { namespace mpi {
  27     template<> struct is_mpi_datatype<void*> : mpl::true_ { };
  28 } } // end namespace boost::mpi
  29
  30 namespace boost {
  31   typedef mpl::if_c<(sizeof(int) == sizeof(void*)),
  32                     int,
  33                     mpl::if_c<(sizeof(long) == sizeof(void*)),
  34                               long,
  35                               mpl::if_c<(sizeof(void*) <= sizeof(boost::intmax_t)),
  36                                         boost::intmax_t,
  37                                         void>::type
  38                               >::type
  39                     >::type ptr_serialize_type;
  40
  41   BOOST_STATIC_ASSERT ((!boost::is_void<ptr_serialize_type>::value));
  42
  43   template<typename T> inline T& unsafe_serialize(T& x) { return x; }
  44
  45   inline ptr_serialize_type& unsafe_serialize(void*& x)
  46   { return reinterpret_cast<ptr_serialize_type&>(x); }
  47
  48   // Force Boost.MPI to serialize a void* like a ptr_serialize_type
  49   namespace mpi {
  50     template<> inline MPI_Datatype get_mpi_datatype<void*>(void* const& x)
  51     {
  52       return get_mpi_datatype<ptr_serialize_type>();
  53     }
  54   }
  55
  56   template<typename T, typename U>
  57   struct unsafe_pair
  58   {
  59     unsafe_pair() { }
  60     unsafe_pair(const T& t, const U& u) : first(t), second(u) { }
  61     unsafe_pair(const std::pair<T, U>& p) : first(p.first), second(p.second) { }
  62     T first;
  63     U second;
  64
  65     template<typename Archiver>
  66     void serialize(Archiver& ar, const unsigned /*version*/)
  67     {
  68       ar & unsafe_serialize(first) & unsafe_serialize(second);
  69     }
  70   };
  71
  72   template<typename T, typename U>
  73   bool operator<(unsafe_pair<T,U> const& x, unsafe_pair<T,U> const& y)
  74   {
  75     return std::make_pair(x.first, x.second) <
  76       std::make_pair(y.first, y.second);
  77   }
  78
  79 } // end namespace boost
  80
  81 #endif // BOOST_PROPERTY_MAP_UNSAFE_SERIALIZE_HPP