ceph/src/boost/libs/serialization/include/boost/serialization/shared_ptr.hpp

   1 #ifndef BOOST_SERIALIZATION_SHARED_PTR_HPP
   2 #define BOOST_SERIALIZATION_SHARED_PTR_HPP
   3
   4 // MS compatible compilers support #pragma once
   5 #if defined(_MSC_VER)
   6 # pragma once
   7 #endif
   8
   9 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
  10 // shared_ptr.hpp: serialization for boost shared pointer
  11
  12 // (C) Copyright 2004 Robert Ramey and Martin Ecker
  13 // Use, modification and distribution is subject to the Boost Software
  14 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  15 // http://www.boost.org/LICENSE_1_0.txt)
  16
  17 //  See http://www.boost.org for updates, documentation, and revision history.
  18
  19 #include <cstddef> // NULL
  20 #include <memory>
  21
  22 #include <boost/config.hpp>
  23 #include <boost/mpl/integral_c.hpp>
  24 #include <boost/mpl/integral_c_tag.hpp>
  25
  26 #include <boost/detail/workaround.hpp>
  27 #include <boost/shared_ptr.hpp>
  28
  29 #include <boost/serialization/shared_ptr_helper.hpp>
  30 #include <boost/serialization/split_free.hpp>
  31 #include <boost/serialization/nvp.hpp>
  32 #include <boost/serialization/version.hpp>
  33 #include <boost/serialization/tracking.hpp>
  34
  35 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
  36 // boost:: shared_ptr serialization traits
  37 // version 1 to distinguish from boost 1.32 version. Note: we can only do this
  38 // for a template when the compiler supports partial template specialization
  39
  40 #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
  41     namespace boost {
  42     namespace serialization{
  43         template<class T>
  44         struct version< ::boost::shared_ptr< T > > {
  45             typedef mpl::integral_c_tag tag;
  46             #if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3206))
  47             typedef typename mpl::int_<1> type;
  48             #else
  49             typedef mpl::int_<1> type;
  50             #endif
  51             BOOST_STATIC_CONSTANT(int, value = type::value);
  52         };
  53         // don't track shared pointers
  54         template<class T>
  55         struct tracking_level< ::boost::shared_ptr< T > > {
  56             typedef mpl::integral_c_tag tag;
  57             #if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3206))
  58             typedef typename mpl::int_< ::boost::serialization::track_never> type;
  59             #else
  60             typedef mpl::int_< ::boost::serialization::track_never> type;
  61             #endif
  62             BOOST_STATIC_CONSTANT(int, value = type::value);
  63         };
  64     }}
  65     #define BOOST_SERIALIZATION_SHARED_PTR(T)
  66 #else
  67     // define macro to let users of these compilers do this
  68     #define BOOST_SERIALIZATION_SHARED_PTR(T)                         \
  69     BOOST_CLASS_VERSION(                                              \
  70         ::boost::shared_ptr< T >,                                     \
  71         1                                                             \
  72     )                                                                 \
  73     BOOST_CLASS_TRACKING(                                             \
  74         ::boost::shared_ptr< T >,                                     \
  75         ::boost::serialization::track_never                           \
  76     )                                                                 \
  77     /**/
  78 #endif
  79
  80 namespace boost {
  81 namespace serialization{
  82
  83 struct null_deleter {
  84     void operator()(void const *) const {}
  85 };
  86
  87 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
  88 // serialization for boost::shared_ptr
  89
  90 // Using a constant means that all shared pointers are held in the same set.
  91 // Thus we detect handle multiple pointers to the same value instances
  92 // in the archive.
  93 void * const shared_ptr_helper_id = 0;
  94
  95 template<class Archive, class T>
  96 inline void save(
  97     Archive & ar,
  98     const boost::shared_ptr< T > &t,
  99     const unsigned int /* file_version */
 100 ){
 101     // The most common cause of trapping here would be serializing
 102     // something like shared_ptr<int>.  This occurs because int
 103     // is never tracked by default.  Wrap int in a trackable type
 104     BOOST_STATIC_ASSERT((tracking_level< T >::value != track_never));
 105     const T * t_ptr = t.get();
 106     ar << boost::serialization::make_nvp("px", t_ptr);
 107 }
 108
 109 #ifdef BOOST_SERIALIZATION_SHARED_PTR_132_HPP
 110 template<class Archive, class T>
 111 inline void load(
 112     Archive & ar,
 113     boost::shared_ptr< T > &t,
 114     const unsigned int file_version
 115 ){
 116     // something like shared_ptr<int>.  This occurs because int
 117     // is never tracked by default.  Wrap int in a trackable type
 118     BOOST_STATIC_ASSERT((tracking_level< T >::value != track_never));
 119     T* r;
 120     if(file_version < 1){
 121         ar.register_type(static_cast<
 122             boost_132::detail::sp_counted_base_impl<T *, null_deleter > *
 123         >(NULL));
 124         boost_132::shared_ptr< T > sp;
 125         ar >> boost::serialization::make_nvp("px", sp.px);
 126         ar >> boost::serialization::make_nvp("pn", sp.pn);
 127         // got to keep the sps around so the sp.pns don't disappear
 128         boost::serialization::shared_ptr_helper<boost::shared_ptr> & h =
 129             ar.template get_helper< shared_ptr_helper<boost::shared_ptr> >(
 130                 shared_ptr_helper_id
 131             );
 132         h.append(sp);
 133         r = sp.get();
 134     }
 135     else{
 136         ar >> boost::serialization::make_nvp("px", r);
 137     }
 138     shared_ptr_helper<boost::shared_ptr> & h =
 139         ar.template get_helper<shared_ptr_helper<boost::shared_ptr> >(
 140             shared_ptr_helper_id
 141         );
 142     h.reset(t,r);
 143 }
 144 #else
 145
 146 template<class Archive, class T>
 147 inline void load(
 148     Archive & ar,
 149     boost::shared_ptr< T > &t,
 150     const unsigned int /*file_version*/
 151 ){
 152     // The most common cause of trapping here would be serializing
 153     // something like shared_ptr<int>.  This occurs because int
 154     // is never tracked by default.  Wrap int in a trackable type
 155     BOOST_STATIC_ASSERT((tracking_level< T >::value != track_never));
 156     T* r;
 157     ar >> boost::serialization::make_nvp("px", r);
 158
 159     boost::serialization::shared_ptr_helper<boost::shared_ptr> & h =
 160         ar.template get_helper<shared_ptr_helper<boost::shared_ptr> >(
 161             shared_ptr_helper_id
 162         );
 163     h.reset(t,r);
 164 }
 165 #endif
 166
 167 template<class Archive, class T>
 168 inline void serialize(
 169     Archive & ar,
 170     boost::shared_ptr< T > &t,
 171     const unsigned int file_version
 172 ){
 173     // correct shared_ptr serialization depends upon object tracking
 174     // being used.
 175     BOOST_STATIC_ASSERT(
 176         boost::serialization::tracking_level< T >::value
 177         != boost::serialization::track_never
 178     );
 179     boost::serialization::split_free(ar, t, file_version);
 180 }
 181
 182 } // namespace serialization
 183 } // namespace boost
 184
 185 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
 186 // std::shared_ptr serialization traits
 187 // version 1 to distinguish from boost 1.32 version. Note: we can only do this
 188 // for a template when the compiler supports partial template specialization
 189
 190 #ifndef BOOST_NO_CXX11_SMART_PTR
 191 #include <boost/static_assert.hpp>
 192
 193 // note: we presume that any compiler/library which supports C++11
 194 // std::pointers also supports template partial specialization
 195 // trap here if such presumption were to turn out to wrong!!!
 196 #ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
 197     BOOST_STATIC_ASSERT(false);
 198 #endif
 199
 200 namespace boost {
 201 namespace serialization{
 202     template<class T>
 203     struct version< ::std::shared_ptr< T > > {
 204         typedef mpl::integral_c_tag tag;
 205         typedef mpl::int_<1> type;
 206         BOOST_STATIC_CONSTANT(int, value = type::value);
 207     };
 208     // don't track shared pointers
 209     template<class T>
 210     struct tracking_level< ::std::shared_ptr< T > > {
 211         typedef mpl::integral_c_tag tag;
 212         typedef mpl::int_< ::boost::serialization::track_never> type;
 213         BOOST_STATIC_CONSTANT(int, value = type::value);
 214     };
 215 }}
 216 // the following just keeps older programs from breaking
 217 #define BOOST_SERIALIZATION_SHARED_PTR(T)
 218
 219 namespace boost {
 220 namespace serialization{
 221
 222 /////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
 223 // serialization for std::shared_ptr
 224
 225 template<class Archive, class T>
 226 inline void save(
 227     Archive & ar,
 228     const std::shared_ptr< T > &t,
 229     const unsigned int /* file_version */
 230 ){
 231     // The most common cause of trapping here would be serializing
 232     // something like shared_ptr<int>.  This occurs because int
 233     // is never tracked by default.  Wrap int in a trackable type
 234     BOOST_STATIC_ASSERT((tracking_level< T >::value != track_never));
 235     const T * t_ptr = t.get();
 236     ar << boost::serialization::make_nvp("px", t_ptr);
 237 }
 238
 239 template<class Archive, class T>
 240 inline void load(
 241     Archive & ar,
 242     std::shared_ptr< T > &t,
 243     const unsigned int /*file_version*/
 244 ){
 245     // The most common cause of trapping here would be serializing
 246     // something like shared_ptr<int>.  This occurs because int
 247     // is never tracked by default.  Wrap int in a trackable type
 248     BOOST_STATIC_ASSERT((tracking_level< T >::value != track_never));
 249     T* r;
 250     ar >> boost::serialization::make_nvp("px", r);
 251     //void (* const id)(Archive &, std::shared_ptr< T > &, const unsigned int) = & load;
 252     boost::serialization::shared_ptr_helper<std::shared_ptr> & h =
 253         ar.template get_helper<
 254             shared_ptr_helper<std::shared_ptr>
 255         >(
 256             shared_ptr_helper_id
 257         );
 258     h.reset(t,r);
 259 }
 260
 261 template<class Archive, class T>
 262 inline void serialize(
 263     Archive & ar,
 264     std::shared_ptr< T > &t,
 265     const unsigned int file_version
 266 ){
 267     // correct shared_ptr serialization depends upon object tracking
 268     // being used.
 269     BOOST_STATIC_ASSERT(
 270         boost::serialization::tracking_level< T >::value
 271         != boost::serialization::track_never
 272     );
 273     boost::serialization::split_free(ar, t, file_version);
 274 }
 275
 276 } // namespace serialization
 277 } // namespace boost
 278
 279 #endif // BOOST_NO_CXX11_SMART_PTR
 280
 281 #endif // BOOST_SERIALIZATION_SHARED_PTR_HPP