Re: [Boost-users] [Serialization]Cannot serialize pointer -- newbieneeds help

24 Aug 2007

      Does the demo included with the library work?

Robert Ramey

  "wei niu" <wei.niu@gmail.com> wrote in message news:58418a380708240143g4993867er7fa68758127f4c5a@mail.gmail.com...
  I cannot serialize an object through a pointer.When running the program,it reports:

  This application has requested the Runtime to terminate it in an unusual way.
  Please contact the application's support team for more information. 

  Below is the code :

  //////////////////////////////////////////////////////////////////////////////////////////////
  //
  //    static link library: libboost_serialization-vc71-s-1_33_1.lib
  //
  ////////////////////////////////////////////////////////////////////////////////////////////// 

  #include <iostream>
  #include <fstream>
  #include <list>

  #include <boost/archive/text_oarchive.hpp>
  #include <boost/archive/text_iarchive.hpp>

  #include <boost/serialization/base_object.hpp> 
  #include <boost/serialization/utility.hpp>
  #include <boost/serialization/list.hpp>

  using std::cout ;
  using std::endl ;

  class gps_position
  {
      public:
          int m_degrees ;
          int m_minu
          float m_seconds ;
          gps_position()
          {
              m_degrees = m_minutes = m_seconds = 0 ;
          }
          gps_position( int degrees, int minutes, float seconds ) 
          {
              m_degrees = degrees ;
              m_minutes = minutes ;
              m_seconds = seconds ;
          }
  };

  std::ostream& operator << ( std::ostream &out, const gps_position &g ) 
  {
      return out << g.m_degrees << '\'' << g.m_minutes << '\'' << g.m_seconds ;
  }

  namespace boost{
      namespace serialization{

          template <class Archive> 
          void serialize( Archive &ar, gps_position &g, const unsigned int version )
          {
              ar & g.m_degrees ;
              ar & g.m_minutes ;
              ar & g.m_seconds ; 
          }

      }
  }

  class bus_stop
  {
      friend class boost::serialization::access;
      template<class Archive>
      void serialize(Archive & ar, const unsigned int version)
      { 
          ar & latitude;
          ar & longitude;
      }
      gps_position latitude;
      gps_position longitude;
  protected:
      bus_stop(const gps_position & lat_, const gps_position & long_) : 
      latitude(lat_), longitude(long_)
      {}
  public:
      bus_stop(){}
      // See item # 14 in Effective C++ by Scott Meyers.
      // re non-virtual destructors in base classes.
      virtual ~bus_stop(){} 
      friend std::ostream& operator << ( std::ostream &out, const bus_stop &bs ) ;
  };

  std::ostream& operator << ( std::ostream &out, const bus_stop &bs )
  {
      return out << bs.latitude << '\t' << bs.longitude ;
  }

  class bus_stop_corner : public bus_stop
  {
      friend class boost::serialization::access;
      std::string street1;
      std::string street2;
      virtual std::string description() const
      {
          return street1 + " and " + street2;
      }
      template<class Archive>
      void serialize(Archive &ar, const unsigned int version) 
      {
          // save/load base class information
          ar & boost::serialization::base_object<bus_stop>(*this);
          ar & street1 & street2;
      }

  public:
      bus_stop_corner(){} 
      bus_stop_corner(const gps_position & _lat, const gps_position & _long,
          const std::string & _s1, const std::string & _s2
      ) :
          bus_stop(_lat, _long), street1(_s1), street2(_s2) 
      {
      }
      friend std::ostream& operator << ( std::ostream &out, const bus_stop_corner &bsc ) ;
  };

  std::ostream& operator << ( std::ostream &out, const bus_stop_corner &bsc ) 
  {
      return out << dynamic_cast<const bus_stop&>(bsc) << ' ' << bsc.description() ;
  }

  class bus_route
  {
      friend class boost::serialization::access;
      bus_stop * stops[2]; 
      template<class Archive>
      void serialize(Archive & ar, const unsigned int version)
      {
          int i;
          for(i = 0; i < 2; ++i)
              ar & stops[i];
      }
  public: 
      bus_route()
      {
          stops[0] = stops[1] = 0 ;
      }
      bus_route( bus_stop *bs1, bus_stop *bs2 )
      {
          stops[0] = bs1, stops[1] = bs2 ;
      }
  };

  int main()
  {
      const char *file_name = "non_intrusive.dat" ;

      bus_stop *bs0 = new bus_stop_corner(
      gps_position(34, 135, 52.560f),
      gps_position(134, 22, 78.30f),
      "24th Street", "10th Avenue" 
      );

      bus_stop *bs1 = new bus_stop_corner(
      gps_position(35, 137, 23.456f),
      gps_position(133, 35, 54.12f),
      "State street", "Cathedral Vista Lane"
      );

      const bus_route br( bs0, bs1 ) ;
      {
          std::ofstream ofs( file_name ) ;
          boost::archive::text_oarchive oa( ofs ) ;
          oa << (br) ;
      }

      bus_route newbr ;
      {
          std::ifstream ifs( file_name ) ;
          boost::archive::text_iarchive ia( ifs ) ;
          ia >> newbr ;
      }

      return 0 ;
  }

  I think maybe it's because I didn't build the serialize library correctly.I builded it with bjam.When debuging it with VS2003,an exception was thrown in the _heap_alloc_base (size_t) function at line 211:
  line 211: return HeapAlloc(_crtheap, 0, size);

  Function "void * __cdecl _heap_alloc_base (size_t size)" is in malloc.c.

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