Hello all My problem is similar to that discussed by Phil and Robert Ramey on 'Boost - Users' back in 08-Feb-2007. Their thread was titled "serialization stream error". Phil however did not post back a follow up and it remains unclear as to whether his difficulties were resolved or not. Moreover, these discussions predate the 1.34.1 release on 24-Jul-2007 by about five months. For my part, I have tried solving the problem covered in this email using: - Boost 1.33.1 from an Ubuntu package and dated 05-Dec-2005 - Boost 1.34.1 built from source under Ubuntu 6.10 I would like to get 'demo_shared_ptr.cpp' to run using XML rather than text as the archive format -- as a precursor to integrating this kind of code into an energy system simulation. I decided to use a step-by-step approach: step 1 - build and run the original 'demo_shared_ptr.cpp' using the original text archive format - therefore, remove the leading A:: and B:: from constructor and destructor definitions - comment out the following (two places): oa.register_type(static_cast<boost::detail::sp_counted_base_impl <B *, boost::checked_deleter<B> > *>(NULL)); [as far as I could tell 'sp_counted_base_impl' no longer exists] step 2 - add NVP statements while retaining the text archive format for the time being - therefore, swap over all archive calls, for instance: // ar & x; ar & boost::serialization::make_nvp("x", x); step 3 - switch to the XML archive format - duly change the following headers: // #include <boost/archive/text_iarchive.hpp> // #include <boost/archive/text_oarchive.hpp> #include <boost/archive/xml_iarchive.hpp> #include <boost/archive/xml_oarchive.hpp> - duly change the archive objects: // boost::archive::text_oarchive oa(ofs); boost::archive::xml_oarchive oa(ofs); Step 3 fails but only in the derived pointer code added by David Tonge to 'demo_shared_ptr.cpp'. A 'boost::STATIC_ASSERTION_FAILURE' is generated. Typical error messages are given after the main body of this posting. At this point, I ran out of ideas. I have read the HTML documentation and made my own notes and still can't see a solution. Any assistance would be very gratefully received! Note too that I only log on once per day so don't expect a rapid turn-around for requests for details. In addition, I will send diffs to the maintainer when I get a satisfactory solution. And, in passing, it is material to note that derived class B does not fully archive its state and that there should probably be an "ar & x" statement in its 'serialize' definition. For the record, here is my development environment: os : Ubuntu 6.10, Linux 2.6.17-12-generic hardware : Toshiba Tecra A2 330 laptop (purchased 27-Aug-2004) specs : 1.4GHz Intel Celeron M (32-bit) / 512MiB RAM / 40GB HDD / 1024x76 gcc : gcc (GCC) 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5) I realize that this is not the latest release of Ubuntu, but otherwise my system is fully current. Lastly, I take it Boost.Serialization and TR1 shared pointers (std::tr1::shared_ptr) remain incompatible at this point in development. Many thanks to Robert Ramey for developing Boost.Serialization. It suits my needs to a tee, so I hope I can get this issue resolved and move on with real coding. best wishes Robbie --------------------------------- selected error messages --------------------------------- /usr/local/include/boost-1_34_1/boost/archive/basic_xml_oarchive.hpp: In member function 'void boost::archive::basic_xml_oarchive<Archive>::save_override(T&, int) [with T = const A, Archive = boost::archive::xml_oarchive]': /usr/local/include/boost-1_34_1/boost/archive/detail/interface_oarchive.hpp:79: instantiated from 'Archive& boost::archive::detail::interface_oarchive<Archive>::operator<<(T&) [with T = const A, Archive = boost::archive::xml_oarchive]' /usr/local/include/boost-1_34_1/boost/archive/detail/interface_oarchive.hpp:87: instantiated from 'Archive& boost::archive::detail::interface_oarchive<Archive>::operator&(T&) [with T = A, Archive = boost::archive::xml_oarchive]' qdemo_shared_ptr.mod01.cpp:76: instantiated from 'void B::serialize(Archive&, unsigned int) [with Archive = boost::archive::xml_oarchive]' /usr/local/include/boost-1_34_1/boost/serialization/access.hpp:109: instantiated from 'static void boost::serialization::access::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::xml_oarchive, T = B]' /usr/local/include/boost-1_34_1/boost/serialization/serialization.hpp:81: instantiated from 'void boost::serialization::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::xml_oarchive, T = B]' /usr/local/include/boost-1_34_1/boost/serialization/serialization.hpp:140: instantiated from 'void boost::serialization::serialize_adl(Archive&, T&, unsigned int) [with Archive = boost::archive::xml_oarchive, T = B]' /usr/local/include/boost-1_34_1/boost/archive/detail/oserializer.hpp:225: instantiated from 'boost::archive::detail::pointer_oserializer<T, Archive>::pointer_oserializer() [with T = B, Archive = boost::archive::xml_oarchive]' /usr/local/include/boost-1_34_1/boost/archive/detail/oserializer.hpp:197: instantiated from 'const boost::archive::detail::pointer_oserializer<B, boost::archive::xml_oarchive> boost::archive::detail::pointer_oserializer<B, boost::archive::xml_oarchive>::instance' /usr/local/include/boost-1_34_1/boost/archive/detail/oserializer.hpp:189: instantiated from 'static const boost::archive::detail::pointer_oserializer<T, Archive>& boost::archive::detail::pointer_oserializer<T, Archive>::instantiate() [with T = B, Archive = boost::archive::xml_oarchive]' /usr/local/include/boost-1_34_1/boost/archive/detail/oserializer.hpp:514: instantiated from 'const boost::archive::detail::basic_pointer_oserializer& boost::archive::detail::instantiate_pointer_oserializer(Archive*, T*) [with Archive = boost::archive::xml_oarchive, T = B]' /usr/local/include/boost-1_34_1/boost/archive/detail/interface_oarchive.hpp:59: instantiated from 'const boost::archive::detail::basic_pointer_oserializer* boost::archive::detail::interface_oarchive<Archive>::register_type(const T*) [with T = B, Archive = boost::archive::xml_oarchive]' demo_shared_ptr.mod01.cpp:200: instantiated from here /usr/local/include/boost-1_34_1/boost/archive/basic_xml_oarchive.hpp:83: error: invalid application of 'sizeof' to incomplete type 'boost::STATIC_ASSERTION_FAILURE<false>' --------------------------------- my modifications --------------------------------- $ diff -u demo_shared_ptr.cpp demo_shared_ptr.mod01.cpp --- demo_shared_ptr.cpp 2007-08-21 11:51:35.000000000 +0200 +++ demo_shared_ptr.mod01.cpp 2007-08-21 14:44:33.000000000 +0200 @@ -9,6 +9,21 @@ // // See http://www.boost.org for updates, documentation, and revision history. +// build : $ g++ -ggdb -Wall demo_shared_ptr.mod01.cpp +// -lboost_serialization-gcc41 -o demo_shared_ptr +// run : $ demo_shared_ptr + +// --------------------------------------------------------- +// PREPROCESSOR DIRECTIVES +// --------------------------------------------------------- + +// 0 = text, 1 = text with NPV statements, 2 = xml +#define XEONA_ARCHIVE_MODE 2 +// 0 = omit DT code, 1 = use DT code +#define DT_CODE 1 + +// --------------------------------------------------------- + #include <iomanip> #include <iostream> #include <fstream> @@ -17,15 +32,23 @@ #include <cstdio> // remove #include <boost/config.hpp> #if defined(BOOST_NO_STDC_NAMESPACE) -namespace std{ +namespace std{ using ::remove; } #endif -#include <boost/archive/text_oarchive.hpp> -#include <boost/archive/text_iarchive.hpp> +#if (XEONA_ARCHIVE_MODE >= 2) +# include <boost/archive/xml_oarchive.hpp> +# include <boost/archive/xml_iarchive.hpp> +#else +# include <boost/archive/text_oarchive.hpp> +# include <boost/archive/text_iarchive.hpp> +#endif + #include <boost/archive/tmpdir.hpp> +//#include <boost/serialization/base_object.hpp> // base class serialization + #include <boost/serialization/shared_ptr.hpp> /////////////////////////// @@ -37,12 +60,18 @@ int x; template<class Archive> void serialize(Archive & ar, const unsigned int /* file_version */){ - ar & x; + +#if (XEONA_ARCHIVE_MODE >= 1) + ar & boost::serialization::make_nvp("x", x); +#else + ar & x; +#endif + } public: static int count; - A::A(){++count;} // default constructor - virtual A::~A(){--count;} // default destructor + A(){++count;} // default constructor + virtual ~A(){--count;} // default destructor }; BOOST_SERIALIZATION_SHARED_PTR(A) @@ -56,12 +85,18 @@ int x; template<class Archive> void serialize(Archive & ar, const unsigned int /* file_version */){ - ar & boost::serialization::base_object<A>(*this); + +#if (XEONA_ARCHIVE_MODE >= 1) + ar & boost::serialization::base_object<A>(*this); // problem +#else + ar & boost::serialization::base_object<A>(*this); +#endif + } public: static int count; - B::B() : A() {}; - virtual B::~B() {}; + B() : A() {}; + virtual ~B() {}; }; BOOST_SERIALIZATION_SHARED_PTR(B) @@ -83,8 +118,30 @@ int main(int argc, char *argv[]) { + std::cout << std::endl; + std::cout << "xeona archive mode : " + << XEONA_ARCHIVE_MODE + << std::endl; + + std::cout << "DT extension mode : " + << DT_CODE + << std::endl; + +#if (XEONA_ARCHIVE_MODE >= 2) + std::string ext = "xml"; +#else + std::string ext = "txt"; +#endif + std::string filename(boost::archive::tmpdir()); filename += "/testfile"; + filename += "."; + filename += ext; + + std::cout << "testfile : " + << filename + << "\n" + << std::endl; // create a new shared pointer to ta new object of type A boost::shared_ptr<A> spa(new A); @@ -94,9 +151,21 @@ // serialize it { std::ofstream ofs(filename.c_str()); + +#if (XEONA_ARCHIVE_MODE >= 2) + boost::archive::xml_oarchive oa(ofs); +#else boost::archive::text_oarchive oa(ofs); +#endif + +#if (XEONA_ARCHIVE_MODE >= 1) + oa << boost::serialization::make_nvp("spa", spa); + oa << boost::serialization::make_nvp("spa1", spa1); +#else oa << spa; oa << spa1; +#endif + } // reset the shared pointer to NULL // thereby destroying the object of type A @@ -108,17 +177,28 @@ { // open the archive std::ifstream ifs(filename.c_str()); + +#if (XEONA_ARCHIVE_MODE >= 2) + boost::archive::xml_iarchive ia(ifs); +#else boost::archive::text_iarchive ia(ifs); +#endif - // restore the schedule from the archive +#if (XEONA_ARCHIVE_MODE >= 1) + ia >> boost::serialization::make_nvp("spa", spa); + ia >> boost::serialization::make_nvp("spa1", spa1); +#else ia >> spa; ia >> spa1; +#endif + } display(spa, spa1); spa.reset(); spa1.reset(); - std::cout << std::endl; +#if (DT_CODE >= 1) + std::cout << std::endl; std::cout << "New tests" << std::endl; @@ -131,17 +211,29 @@ // serialize it { std::ofstream ofs(filename.c_str()); + +#if (XEONA_ARCHIVE_MODE >= 2) + boost::archive::xml_oarchive oa(ofs); +#else boost::archive::text_oarchive oa(ofs); +#endif oa.register_type(static_cast<B *>(NULL)); - oa.register_type( - static_cast< - boost::detail::sp_counted_base_impl< - B *, boost::checked_deleter<B> - > * - >(NULL) - ); +// oa.register_type( +// static_cast< +// boost::detail::sp_counted_base_impl< +// B *, boost::checked_deleter<B> +// > * +// >(NULL) +// ); + +#if (XEONA_ARCHIVE_MODE >= 1) + oa << boost::serialization::make_nvp("spa", spa); + oa << boost::serialization::make_nvp("spa1", spa1); +#else oa << spa; oa << spa1; +#endif + } // reset the shared pointer to NULL // thereby destroying the object of type B @@ -153,25 +245,40 @@ { // open the archive std::ifstream ifs(filename.c_str()); + +#if (XEONA_ARCHIVE_MODE >= 2) + boost::archive::xml_iarchive ia(ifs); +#else boost::archive::text_iarchive ia(ifs); +#endif - // restore the schedule from the archive ia.register_type(static_cast<B *>(NULL)); - ia.register_type( - static_cast< - boost::detail::sp_counted_base_impl< - B *, boost::checked_deleter<B> - > * - >(NULL) - ); +// ia.register_type( +// static_cast< +// boost::detail::sp_counted_base_impl< +// B *, boost::checked_deleter<B> +// > * +// >(NULL) +// ); + +#if (XEONA_ARCHIVE_MODE >= 1) + ia >> boost::serialization::make_nvp("spa", spa); + ia >> boost::serialization::make_nvp("spa1", spa1); +#else ia >> spa; ia >> spa1; +#endif + } display(spa, spa1); + +#endif // DT code + /////////////// - std::remove(filename.c_str()); + // std::remove(filename.c_str()); // obj of type A gets destroyed // as smart_ptr goes out of scope return 0; } + --- Robbie Morrison PhD student -- policy-oriented energy system simulation Institute for Energy Engineering (IET) Technical University of Berlin (TU-Berlin), Germany University email (redirected) : morrison@iet.tu-berlin.de Webmail (preferred) : robbie@actrix.co.nz [from IMAP client]