March 2007 - Boost-users - lists.preview.boost.org

[serialization] free load/save
by Ruediger Berlich 01 Apr '07

01 Apr '07

Dear all, I'd like to serialize a number of classes using the free-standing version of the serialize function. As I do not want to access internals of the classes directly, I have to work with set/get functions, which in turn implies having to write load/save functions. This seems to work for simple types, like in the following example. But will it circumvent any internal mechanisms of Boost.Serialization , if I do not give the library direct access to class data ? Will this work for complex types, e.g. vectors of shared_ptr objects ? /*************************************************************************/ class base{ public: base(void){ setSecret(1); } base(int val){ setSecret(val); } virtual ~base(){ /* nothing */ } virtual int getSecret(void) const{ return secret; } virtual void printInfo(void) = 0; void setSecret(int val){ secret = val; } private: int secret; }; BOOST_IS_ABSTRACT(base); namespace boost { namespace serialization { template<class Archive> void save(Archive & ar, const base & t, unsigned int version) { int secret = t.getSecret(); ar & make_nvp("secret", secret); } template<class Archive> void load(Archive & ar, base & t, unsigned int version) { int secret; ar & make_nvp("secret", secret); t.setSecret(secret); } template<class Archive> inline void serialize(Archive & ar, base & t; const unsigned int version) { split_free(ar, t, version); } } } /*************************************************************************/ Thanks and have a good day, Ruediger

2 2

[serialization / shared_ptr] Problem to serialize a shared_ptr
by Ruediger Berlich 31 Mar '07

31 Mar '07

Hi there, I am relatively new to Boost in general and serialization in particular. Nevertheless, having spent the day trying to find out how to serialize a shared_ptr, I feel it is time to search for some external advice. So any help is appreciated! Here is the (hopefully) simple program: /************************************************************/ #include <typeinfo> #include <fstream> #include <iostream> #include <sstream> #include <vector> #include <boost/shared_ptr.hpp> #include <boost/archive/xml_oarchive.hpp> #include <boost/archive/xml_iarchive.hpp> #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> #include <boost/serialization/nvp.hpp> #include <boost/serialization/vector.hpp> // #include <boost/serialization/shared_ptr_132.hpp> #include <boost/serialization/shared_ptr.hpp> #include <boost/serialization/base_object.hpp> #include <boost/serialization/utility.hpp> #include <boost/serialization/export.hpp> #include <boost/serialization/tracking.hpp> using namespace std; using namespace boost; using namespace boost::serialization; class ptr{ friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version){ using boost::serialization::make_nvp; ar & make_nvp("p",p); } shared_ptr<int> p; public: ptr(){ shared_ptr<int> dummy(new int(6)); p = dummy; } void printInfo(void){ cout << "*(p.get()) = " << *(p.get()) << endl; } }; main() { ostringstream ofs; ptr myp; { boost::archive::xml_oarchive oa(ofs); oa << make_nvp("myp",myp); } cout << ofs.str() << endl; ptr newmyp; { istringstream ifs; ifs.str(ofs.str()); boost::archive::xml_iarchive ia(ifs); ia >> make_nvp("myp",newmyp); } newmyp.printInfo(); return 0; } /************************************************************/ When I try to compile this (OpenSUSE 10.2, g++ 4.1.2, Boost 1.33.1), I get a LONG list of error messages, of which I will only quote the first few lines only: /************************************************************/ $ g++ -o test14 -lboost_serialization test14.cc /usr/include/boost/serialization/shared_ptr.hpp: In function ‘void boost::serialization::serialize(Archive&, boost::shared_ptr<U>&, unsigned int) [with Archive = boost::archive::xml_iarchive, T = int]’: /usr/include/boost/serialization/serialization.hpp:140: instantiated from ‘void boost::serialization::serialize_adl(Archive&, T&, unsigned int) [with Archive = boost::archive::xml_iarchive, T = boost::shared_ptr<int>]’ /usr/include/boost/archive/detail/iserializer.hpp:160: instantiated from ‘void boost::archive::detail::iserializer<Archive, T>::load_object_data(boost::archive::detail::basic_iarchive&, void*, unsigned int) const [with Archive = boost::archive::xml_iarchive, T = boost::shared_ptr<int>]’ test14.cc:73: instantiated from here /usr/include/boost/serialization/shared_ptr.hpp:235: error: invalid application of ‘sizeof’ to incomplete type ‘boost::STATIC_ASSERTION_FAILURE<false>’ [...] /************************************************************/ The "STATIC_ASSERTION_FAILURE appears quite often in the error messages. BTW, the program runs nicely, if I include a simple int as "data load" in this class (and modify the program to accept an int instead of a shared_ptr, of course). I'm therefore confident that most of the logic is just fine. Any help is appreciated! Best Regards, Ruediger

2 3

stream / container / shared_ptr
by JD 31 Mar '07

31 Mar '07

Hello, Anyone has an idea why this code crashes: // snippet on #include <list> #include <string> #include <iostream> #include <boost/shared_ptr.hpp> struct null_deleter { void operator()(void const *) const {} }; int main() { std::list<boost::shared_ptr<std::ostream> > l; boost::shared_ptr<std::ostream> p(&std::cout, null_deleter()); *p << "on the shared pointer" << std::endl; l.push_back(p); std::list<boost::shared_ptr<std::ostream> >::iterator it = l.begin(); std::cout << "before loop" << std::endl; while (it++ != l.end()) { boost::shared_ptr<std::ostream> p2 = *it; *p2 << "test" << std::endl; // crash here } return 0; } // snippet off // output on on the shared pointer before loop segmentation fault // output off It crashes on: std::ostream::sentry::sentry () from /usr/lib/libstdc++.so.6 Thanks.

2 1

statechart events and operator=
by Federico J. Fernández 31 Mar '07

31 Mar '07

As you may know, I'm trying to use boost::statechart::events with boost::variant, but I have the following problem. When I try to assign a statechart::event to a variant<events...> I need to define operator= for my class that is derived from the events.. and then when I call the statechart::event::operator= the compiler throws the following error: /usr/include/boost/statechart/detail/rtti_policy.hpp: In member function 'boost::statechart::detail::rtti_policy::rtti_base_type<boost::statechart::detail::counted_base<true> >& boost::statechart::detail::rtti_policy::rtti_base_type<boost::statechart::detail::counted_base<true> >::operator=(const boost::statechart::detail::rtti_policy::rtti_base_type<boost::statechart::detail::counted_base<true> >&)': /usr/include/boost/statechart/detail/rtti_policy.hpp:94: error: non-static reference member 'const boost::statechart::detail::id_provider& boost::statechart::detail::rtti_policy::rtti_base_type<boost::statechart::detail::counted_base<true> >::idProvider_', can't use default assignment operator /usr/include/boost/statechart/event_base.hpp: In member function 'boost::statechart::event_base& boost::statechart::event_base::operator=(const boost::statechart::event_base&)': /usr/include/boost/statechart/event_base.hpp:51: note: synthesized method 'boost::statechart::detail::rtti_policy::rtti_base_type<boost::statechart::detail::counted_base<true> >& boost::statechart::detail::rtti_policy::rtti_base_type<boost::statechart::detail::counted_base<true> >::operator=(const boost::statechart::detail::rtti_policy::rtti_base_type<boost::statechart::detail::counted_base<true> >&)' first required here /usr/include/boost/statechart/detail/rtti_policy.hpp: In member function 'boost::statechart::detail::rtti_policy::rtti_derived_type<evt_enviar_telegrama, boost::statechart::event_base>& boost::statechart::detail::rtti_policy::rtti_derived_type<evt_enviar_telegrama, boost::statechart::event_base>::operator=(const boost::statechart::detail::rtti_policy::rtti_derived_type<evt_enviar_telegrama, boost::statechart::event_base>&)': /usr/include/boost/statechart/detail/rtti_policy.hpp:149: note: synthesized method 'boost::statechart::event_base& boost::statechart::event_base::operator=(const boost::statechart::event_base&)' first required here /usr/include/boost/statechart/event.hpp: In member function 'boost::statechart::event<evt_enviar_telegrama, std::allocator<void> >& boost::statechart::event<evt_enviar_telegrama, std::allocator<void> >::operator=(const boost::statechart::event<evt_enviar_telegrama, std::allocator<void> >&)': /usr/include/boost/statechart/event.hpp:32: note: synthesized method 'boost::statechart::detail::rtti_policy::rtti_derived_type<evt_enviar_telegrama, boost::statechart::event_base>& boost::statechart::detail::rtti_policy::rtti_derived_type<evt_enviar_telegrama, boost::statechart::event_base>::operator=(const boost::statechart::detail::rtti_policy::rtti_derived_type<evt_enviar_telegrama, boost::statechart::event_base>&)' first required here evento.h: In member function 'evt_enviar_telegrama& evt_enviar_telegrama::operator=(const evt_enviar_telegrama&)': evento.h:64: note: synthesized method 'boost::statechart::event<evt_enviar_telegrama, std::allocator<void> >& boost::statechart::event<evt_enviar_telegrama, std::allocator<void> >::operator=(const boost::statechart::event<evt_enviar_telegrama, std::allocator<void> >&)' first required here (evt_enviar_telegrama is one of the types of the variant, and I'm calling sc::event<evt_enviar_telegrama>::operator=(t); line 64) Any clues? Thanks!

2 1

[BGL] internal properties problem
by Alejandro Marcos Aragón 31 Mar '07

31 Mar '07

Hi everyone, I'm trying to create a graph with two internal properties and it is strange because my code works fine when I use only one internal property, and I have a segmentation fault when I attach the second property. Does anyone have a clue why this is happening? Is this a bug? The code is as follows: struct vertex_point_t { typedef vertex_property_tag kind; }; struct vertex_location_t { typedef vertex_property_tag kind; }; struct edge_invalid_t { typedef edge_property_tag kind; }; // vertex properties typedef property < vertex_point_t, Point > domainVertexProperty; // edge propeties typedef property < edge_invalid_t, bool > domainEdgeProperty; typedef adjacency_list< setS, vecS, undirectedS, domainVertexProperty, domainEdgeProperty > domainGraph; this works fine but if I declare the domainVertexProperty as typedef property < vertex_point_t, Point, property < vertex_loation_t, int > > domainVertexProperty; it doesn't work anymore. Thanks for your help.

1 0

Boost::Graph breadth first search visitor has an invalid write of size 4
by Stephen Torri 30 Mar '07

30 Mar '07

This is the error that I am getting reported back to me by valgrind for my program. Unfortunately whatever the real reason is causing Valgrind to barf at this error and cry foul. The Valgrind FAQ says fix your memory errors and this will hopefully go away. Well I am quite naive on my use of Valgrind to nail down a particular bug. From the output below can anyone suggested as to where to start looking? System: Fedora Core 6 GCC: 4.1.1 20070105 (Red Hat 4.1.1-51) BOOST: 1.33.1 (11.fc6) Reverse_Impl::print_Graph is defined as: void Reverse_Impl::print_Graph ( infrastructure::Component_Graph const& graph_ref, std::string const name ) const { std::stringstream output_data; visitor::Graphviz_Visitor graphviz_ref ( graph_ref, output_data ); boost::breadth_first_search ( graph_ref.get_Graph(), // Return the Boost directed graph graph_ref.get_Vertex ( 1 ), // Return the root vertex in the boost graph boost::visitor ( graphviz_ref ) ); std::stringstream filename; filename << name << ".dot"; std::string final_name = filename.str(); std::ofstream output_file ( final_name.c_str() ); output_file << "digraph " << name << " {" << std::endl; output_file << output_data.str(); output_file << "}" << std::endl; output_file.close(); } Graphviz_Vistor discover_vertex is the only function I override in the default breadth first search visitor: class Graphviz_Visitor : public boost::default_bfs_visitor { public: // Constructor Graphviz_Visitor ( infrastructure::Component_Graph const& graph_ref, std::stringstream& output ); // Visitor functions template <class Vertex, class Graph> void discover_vertex(Vertex v, Graph const& g) { typename Graph::out_edge_iterator pos; typename Graph::out_edge_iterator end; typename Graph::vertex_descriptor node; typename infrastructure::Component::ptr_t target_obj_ptr; typename infrastructure::Component::ptr_t src_obj_ptr = m_graph_ref.get_Component(v); // Print out graphviz node for vertex m_output_data << boost::format("%d [label=\"%s(%d)\"];") % src_obj_ptr->get_ID() % src_obj_ptr->get_Name() % src_obj_ptr->get_ID() << std::endl; // For all children, print out path from vertex id to child id for ( boost::tie(pos,end) = out_edges(v, g); pos != end; ++pos) { node = target (*pos, g); target_obj_ptr = m_graph_ref.get_Component(node); m_output_data << boost::format("%d -> %d;") % src_obj_ptr->get_ID() % target_obj_ptr->get_ID() << std::endl; } } private: infrastructure::Component_Graph const& m_graph_ref; std::stringstream& m_output_data; }; File_Type_Detector(1) - initialized with data from component #0 ==13733== Invalid write of size 4 ==13733== at 0x4155F73: void boost::put<boost::iterator_property_map<__gnu_cxx::__normal_iterator<boost::default_color_type*, std::vector<boost::default_color_type, std::allocator<boost::default_color_type> > >, boost::adj_list_vertex_property_map<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::directedS<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::shared_ptr<libreverse::infrastructure::Component>, boost::shared_ptr<libreverse::infrastructure::Component>, boost::listS>, unsigned, unsigned const&, boost::property>, boost::default_color_type, boost::default_color_type&>, unsigned const, void*, boost::default_color_type>(boost::put_get_helper<unsigned const, boost::iterator_property_map<__gnu_cxx::__normal_iterator<boost::default_color_type*, std::vector<boost::default_color_type, std::allocator<boost::default_color_type> > >, boost::adj_list_vertex_property_map<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::directedS<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::shared_ptr<libreverse::infrastructure::Component>, boost::shared_ptr<libreverse::infrastructure::Component>, boost::listS>, unsigned, unsigned const&, boost::property>, boost::default_color_type, boost::default_color_type&> > const&, void*, boost::default_color_type const&) (property_map.hpp:319) ==13733== by 0x415D9D1: void boost::breadth_first_search<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>, boost::queue<void*, std::deque<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>, std::allocator<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS> > > >, libreverse::visitor::Graphviz_Visitor, boost::iterator_property_map<__gnu_cxx::__normal_iterator<boost::default_color_type*, std::vector<libreverse::visitor::Graphviz_Visitor, std::allocator<libreverse::visitor::Graphviz_Visitor> > >, boost::adj_list_vertex_property_map<boost::no_property, unsigned, unsigned const&, boost::vertex_index_t>, libreverse::visitor::Graphviz_Visitor, libreverse::visitor::Graphviz_Visitor&> >(boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS> const&, boost::graph_traits<boost::adj_list_vertex_property_map>::vertex_descriptor, boost::queue<void*, std::deque<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>, std::allocator<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS> > > >&, libreverse::visitor::Graphviz_Visitor, boost::iterator_property_map<__gnu_cxx::__normal_iterator<boost::default_color_type*, std::vector<libreverse::visitor::Graphviz_Visitor, std::allocator<libreverse::visitor::Graphviz_Visitor> > >, boost::adj_list_vertex_property_map<boost::no_property, unsigned, unsigned const&, boost::vertex_index_t>, libreverse::visitor::Graphviz_Visitor, libreverse::visitor::Graphviz_Visitor&>) (breadth_first_search.hpp:97) ==13733== by 0x415DAF1: void boost::detail::bfs_helper<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>, boost::iterator_property_map<__gnu_cxx::__normal_iterator<boost::default_color_type*, std::vector<__gnu_cxx, std::allocator<__gnu_cxx> > >, boost::adj_list_vertex_property_map<boost::no_property, unsigned, unsigned const&, boost::vertex_index_t>, __gnu_cxx, __gnu_cxx&>, libreverse::visitor::Graphviz_Visitor, unsigned const&, boost::graph_visitor_t, boost::no_property>(boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>&, boost::graph_traits<__gnu_cxx>::vertex_descriptor, boost::iterator_property_map<__gnu_cxx::__normal_iterator<boost::default_color_type*, std::vector<__gnu_cxx, std::allocator<__gnu_cxx> > >, boost::adj_list_vertex_property_map<boost::no_property, unsigned, unsigned const&, boost::vertex_index_t>, __gnu_cxx, __gnu_cxx&>, libreverse::visitor::Graphviz_Visitor, boost::bgl_named_params<unsigned const&, boost::graph_visitor_t, boost::no_property> const&) (breadth_first_search.hpp:185) ==13733== by 0x415DCC1: void boost::detail::bfs_dispatch<boost::detail::error_property_not_found>::apply<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>, libreverse::visitor::Graphviz_Visitor, boost::graph_visitor_t, boost::no_property>(boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>&, boost::graph_traits<libreverse::visitor::Graphviz_Visitor>::vertex_descriptor, boost::bgl_named_params<libreverse::visitor::Graphviz_Visitor, boost::graph_visitor_t, boost::no_property> const&, boost::detail::error_property_not_found) (breadth_first_search.hpp:226) ==13733== by 0x415DD4B: void boost::breadth_first_search<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>, libreverse::visitor::Graphviz_Visitor, boost::graph_visitor_t, boost::no_property>(boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS> const&, boost::graph_traits<libreverse::visitor::Graphviz_Visitor>::vertex_descriptor, boost::bgl_named_params<libreverse::visitor::Graphviz_Visitor, boost::graph_visitor_t, boost::no_property> const&) (breadth_first_search.hpp:255) ==13733== by 0x41515D5: libreverse::api::Reverse_Impl::print_Graph(libreverse::infrastructure::Component_Graph const&, std::string) const (Reverse_Impl.cpp:189) ==13733== by 0x4151D71: libreverse::api::Reverse_Impl::execute_Analysis_Section(boost::shared_ptr<std::map<std::string, boost::shared_ptr<libreverse::infrastructure::Component_Graph>, std::less<std::string>, std::allocator<std::pair<std::string const, boost::shared_ptr<libreverse::infrastructure::Component_Graph> > > > >, std::pair<boost::shared_ptr<libreverse::infrastructure::Data_Source_Base const>, boost::shared_ptr<libreverse::infrastructure::Component> > const&) (Reverse_Impl.cpp:104) ==13733== by 0x4144534: libreverse::api::Reverse::execute(std::string const&, unsigned const&, unsigned const&) (Reverse.cpp:138) ==13733== by 0x8055599: main (reverse.cpp:50) ==13733== Address 0x5AE64F0 is not stack'd, malloc'd or (recently) free'd valgrind: m_mallocfree.c:178 (mk_plain_bszB): Assertion 'bszB != 0' failed. ==13733== at 0x38016499: report_and_quit (m_libcassert.c:136) ==13733== by 0x380167C3: vgPlain_assert_fail (m_libcassert.c:200) ==13733== by 0x3802040C: vgPlain_arena_malloc (m_mallocfree.c:178) ==13733== by 0x38036077: vgPlain_cli_malloc (replacemalloc_core.c:101) ==13733== by 0x3800238E: vgMemCheck___builtin_new (mc_malloc_wrappers.c:182) ==13733== by 0x380367D2: do_client_request (scheduler.c:1158) ==13733== by 0x3803810C: vgPlain_scheduler (scheduler.c:869) ==13733== by 0x38057103: run_a_thread_NORETURN (syswrap-linux.c:87) sched status: running_tid=1 Thread 1: status = VgTs_Runnable ==13733== at 0x4005BA5: operator new(unsigned) (vg_replace_malloc.c:163) ==13733== by 0x48035A1A: std::string::_Rep::_S_create(unsigned, unsigned, std::allocator<char> const&) (in /usr/lib/libstdc++.so.6.0.8) ==13733== by 0x48037747: std::string::_M_mutate(unsigned, unsigned, unsigned) (in /usr/lib/libstdc++.so.6.0.8) ==13733== by 0x480378E9: std::string::_M_replace_safe(unsigned, unsigned, char const*, unsigned) (in /usr/lib/libstdc++.so.6.0.8) ==13733== by 0x48038959: std::string::replace(unsigned, unsigned, char const*, unsigned) (in /usr/lib/libstdc++.so.6.0.8) ==13733== by 0x48038B46: std::string::replace(__gnu_cxx::__normal_iterator<char*, std::string>, __gnu_cxx::__normal_iterator<char*, std::string>, __gnu_cxx::__normal_iterator<char const*, std::string>, __gnu_cxx::__normal_iterator<char const*, std::string>) (in /usr/lib/libstdc++.so.6.0.8) ==13733== by 0x8057F3D: std::string& std::string::append<__gnu_cxx::__normal_iterator<char const*, std::string> >(__gnu_cxx::__normal_iterator<char const*, std::string>, __gnu_cxx::__normal_iterator<char const*, std::string>) (basic_string.h:847) ==13733== by 0x8057FDF: void boost::io::detail::append_string<std::string>(std::string&, std::string const&, std::string::size_type, std::string::size_type) (parsing.hpp:383) ==13733== by 0x8063049: boost::basic_format<char, std::char_traits<char>, std::allocator<char> >::parse(std::string const&) (parsing.hpp:433) ==13733== by 0x8063593: boost::basic_format<char, std::char_traits<char>, std::allocator<char> >::basic_format(char const*) (format_implementation.hpp:33) ==13733== by 0x415C2D8: void libreverse::visitor::Graphviz_Visitor::discover_vertex<void*, boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS> >(void*, boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS> const&) (Graphviz_Visitor.h:33) ==13733== by 0x415D5E6: void boost::breadth_first_visit<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>, boost::queue<void*, std::deque<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>, std::allocator<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS> > > >, libreverse::visitor::Graphviz_Visitor, boost::iterator_property_map<__gnu_cxx::__normal_iterator<boost::default_color_type*, std::vector<libreverse::visitor::Graphviz_Visitor, std::allocator<libreverse::visitor::Graphviz_Visitor> > >, boost::adj_list_vertex_property_map<boost::no_property, unsigned, unsigned const&, boost::vertex_index_t>, libreverse::visitor::Graphviz_Visitor, libreverse::visitor::Graphviz_Visitor&> >(boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS> const&, boost::graph_traits<boost::adj_list_vertex_property_map>::vertex_descriptor, boost::queue<void*, std::deque<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>, std::allocator<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS> > > >&, libreverse::visitor::Graphviz_Visitor, boost::iterator_property_map<__gnu_cxx::__normal_iterator<boost::default_color_type*, std::vector<libreverse::visitor::Graphviz_Visitor, std::allocator<libreverse::visitor::Graphviz_Visitor> > >, boost::adj_list_vertex_property_map<boost::no_property, unsigned, unsigned const&, boost::vertex_index_t>, libreverse::visitor::Graphviz_Visitor, libreverse::visitor::Graphviz_Visitor&>) (breadth_first_search.hpp:65) ==13733== by 0x415DA51: void boost::breadth_first_search<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>, boost::queue<void*, std::deque<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>, std::allocator<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS> > > >, libreverse::visitor::Graphviz_Visitor, boost::iterator_property_map<__gnu_cxx::__normal_iterator<boost::default_color_type*, std::vector<libreverse::visitor::Graphviz_Visitor, std::allocator<libreverse::visitor::Graphviz_Visitor> > >, boost::adj_list_vertex_property_map<boost::no_property, unsigned, unsigned const&, boost::vertex_index_t>, libreverse::visitor::Graphviz_Visitor, libreverse::visitor::Graphviz_Visitor&> >(boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS> const&, boost::graph_traits<boost::adj_list_vertex_property_map>::vertex_descriptor, boost::queue<void*, std::deque<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>, std::allocator<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS> > > >&, libreverse::visitor::Graphviz_Visitor, boost::iterator_property_map<__gnu_cxx::__normal_iterator<boost::default_color_type*, std::vector<libreverse::visitor::Graphviz_Visitor, std::allocator<libreverse::visitor::Graphviz_Visitor> > >, boost::adj_list_vertex_property_map<boost::no_property, unsigned, unsigned const&, boost::vertex_index_t>, libreverse::visitor::Graphviz_Visitor, libreverse::visitor::Graphviz_Visitor&>) (breadth_first_search.hpp:100) ==13733== by 0x415DAF1: void boost::detail::bfs_helper<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>, boost::iterator_property_map<__gnu_cxx::__normal_iterator<boost::default_color_type*, std::vector<__gnu_cxx, std::allocator<__gnu_cxx> > >, boost::adj_list_vertex_property_map<boost::no_property, unsigned, unsigned const&, boost::vertex_index_t>, __gnu_cxx, __gnu_cxx&>, libreverse::visitor::Graphviz_Visitor, unsigned const&, boost::graph_visitor_t, boost::no_property>(boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>&, boost::graph_traits<__gnu_cxx>::vertex_descriptor, boost::iterator_property_map<__gnu_cxx::__normal_iterator<boost::default_color_type*, std::vector<__gnu_cxx, std::allocator<__gnu_cxx> > >, boost::adj_list_vertex_property_map<boost::no_property, unsigned, unsigned const&, boost::vertex_index_t>, __gnu_cxx, __gnu_cxx&>, libreverse::visitor::Graphviz_Visitor, boost::bgl_named_params<unsigned const&, boost::graph_visitor_t, boost::no_property> const&) (breadth_first_search.hpp:185) ==13733== by 0x415DCC1: void boost::detail::bfs_dispatch<boost::detail::error_property_not_found>::apply<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>, libreverse::visitor::Graphviz_Visitor, boost::graph_visitor_t, boost::no_property>(boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>&, boost::graph_traits<libreverse::visitor::Graphviz_Visitor>::vertex_descriptor, boost::bgl_named_params<libreverse::visitor::Graphviz_Visitor, boost::graph_visitor_t, boost::no_property> const&, boost::detail::error_property_not_found) (breadth_first_search.hpp:226) ==13733== by 0x415DD4B: void boost::breadth_first_search<boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS>, libreverse::visitor::Graphviz_Visitor, boost::graph_visitor_t, boost::no_property>(boost::adjacency_list<boost::setS, boost::setS, boost::directedS, boost::property<boost::vertex_index_t, unsigned, boost::property<boost::vertex_name_t, boost::shared_ptr<libreverse::infrastructure::Component>, boost::no_property> >, boost::no_property, boost::no_property, boost::listS> const&, boost::graph_traits<libreverse::visitor::Graphviz_Visitor>::vertex_descriptor, boost::bgl_named_params<libreverse::visitor::Graphviz_Visitor, boost::graph_visitor_t, boost::no_property> const&) (breadth_first_search.hpp:255) ==13733== by 0x41515D5: libreverse::api::Reverse_Impl::print_Graph(libreverse::infrastructure::Component_Graph const&, std::string) const (Reverse_Impl.cpp:189) ==13733== by 0x4151D71: libreverse::api::Reverse_Impl::execute_Analysis_Section(boost::shared_ptr<std::map<std::string, boost::shared_ptr<libreverse::infrastructure::Component_Graph>, std::less<std::string>, std::allocator<std::pair<std::string const, boost::shared_ptr<libreverse::infrastructure::Component_Graph> > > > >, std::pair<boost::shared_ptr<libreverse::infrastructure::Data_Source_Base const>, boost::shared_ptr<libreverse::infrastructure::Component> > const&) (Reverse_Impl.cpp:104) ==13733== by 0x4144534: libreverse::api::Reverse::execute(std::string const&, unsigned const&, unsigned const&) (Reverse.cpp:138) ==13733== by 0x8055599: main (reverse.cpp:50) Stephen

1 0

Correct way to store shared_ptr objects in a stl::map
by Stephen Torri 30 Mar '07

30 Mar '07

I have a class, called Reader_Factory, which creates file readers for a particular input file based on its type. Other objects will request a certain type of reader multiple times so I am caching the reader object in a STL map with its file name as the key. std::map<std::string, boost::shared_ptr<Reader> > Well when I include in sp_debug_hooks.cpp into my build along with defining -DBOOST_SP_ENABLE_DEBUG_HOOKS in the compiler's command line flags I am seeing a error come up with its destroying the Reader_Factory. *** errors detected in test suite "Reverse_Impl test suite"; see standard output for details test_one_node_per_section: sp_debug_hooks.cpp:201: void operator delete(void*): Assertion `*pm == allocated_scalar' failed. Checking the back trace in gdb (full backtrace below) I am seeing that Reader_Factory destructor is called followed by the std::map destructor followed by the reader object's destructor. So this made me think that perhaps I am doing something wrong with storing a reader object in the Reader_Factory class. Well gdb reports back that there was a segmentation fault in a destructor for a class called Data_Source. The line reades: 26 m_transfer_method->close(); Checking m_transfer_method in gdb reports: (gdb) p m_transfer_method $3 = {px = 0x8d8af58, pn = {pi_ = 0x8d8af80, id_ = 741732609}} (gdb) p *m_transfer_method.px $4 = {<libreverse::infrastructure::Data_Transfer_Base> = {_vptr.Data_Transfer_Base = 0x4}, m_config = {px = 0x8d7ff28, pn = {pi_ = 0x8d7ff40, id_ = 741732609}}, m_data = {px = 0x8d87360, pn = {pi_ = 0x8d873c8, id_ = 741732609}}} So I am not sure what is the segfault here. To help here is pseudo code similiar to what I am doing: class File_Reader { }; class B_Reader : public File_Reader {}; class Reader_Factory { public: virtual ~Reader_Factory(){} boost::shared_ptr<File_Reader> create_B_Reader ( std::string filename ) { boost::shared_ptr<File_Reader> tmp_ptr ( new B_Reader ( filename ) ); IF tmp_ptr->support_File_Type is TRUE THEN return reader ELSE throw an exception } boost::shared_ptr<File_Reader> get_Reader ( std::string filename ) { bool found = false; boost::shared_ptr<File_Reader> reader_ptr; // IF the File_Reader is already cached in the map THEN return pointer to it // ELSE // Find which reader will support it THEN set found to TRUE // (For example, see create_B_Reader) // IF found equal to TRUE and reader_ptr is set THEN check to see if its in the reader map // IF not THEN add it // ELSE we should not reach this point (abort. If it exists already then the first IF statement will catch it) Reader_Map_t::const_iterator cpos = reader_map.find ( filename ); if ( cpos == reader_map.end() ) { try { reader_ptr = this->create_B_Reader ( filename ); found = true; } catch ( std::exception& ) { found = false; } if ( ! found ) THEN throw exception saying unsupported file type else { if ( ( reader_map.insert ( std::make_pair ( filename, reader_ptr ) ) ).second == false ) THEN report exception saying duplicate entry the program is broken stop running } } else { reader_ptr = (*cpos).second; } return reader_ptr; } typedef std::map<std::string, boost::shared_ptr<File_Reader> > Reader_Map_t; Reader_Map_t reader_map; }; Is there a problem or problems with this design? Stephen ---------------------------------------------------------------------------- Full gdb output from SIGABRT given by sp_debug_hooks ---------------------------------------------------------------------------- #0 0x00367402 in __kernel_vsyscall () #1 0x47bd9d40 in raise () from /lib/libc.so.6 #2 0x47bdb591 in abort () from /lib/libc.so.6 #3 0x47bd338b in __assert_fail () from /lib/libc.so.6 #4 0x006c20ae in operator delete (p=0x8d9f2a8) at sp_debug_hooks.cpp:201 #5 0x006d4983 in __gnu_cxx::new_allocator<std::_Rb_tree_node<std::pair<unsigned int const, unsigned int> > >::deallocate ( this=0x8d8ae4c, __p=0x8d9f2a8) at /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c++/4.1.1/ext/new_allocator.h:94 #6 0x006d49b8 in std::_Rb_tree<unsigned int, std::pair<unsigned int const, unsigned int>, std::_Select1st<std::pair<unsigned int const, unsigned int> >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, unsigned int> > >::_M_put_node (this=0x8d8ae4c, __p=0x8d9f2a8) at /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c++/4.1.1/bits/stl_tree.h:362 #7 0x006d4a18 in std::_Rb_tree<unsigned int, std::pair<unsigned int const, unsigned int>, std::_Select1st<std::pair<unsigned int const, unsigned int> >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, unsigned int> > >::destroy_node (this=0x8d8ae4c, __p=0x8d9f2a8) at /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c++/4.1.1/bits/stl_tree.h:392 #8 0x006d4a8e in std::_Rb_tree<unsigned int, std::pair<unsigned int const, unsigned int>, std::_Select1st<std::pair<unsigned int const, unsigned int> >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, unsigned int> > >::_M_erase (this=0x8d8ae4c, __x=0x8d9f2a8) at /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c++/4.1.1/bits/stl_tree.h:1266 #9 0x006d4a6e in std::_Rb_tree<unsigned int, std::pair<unsigned int const, unsigned int>, std::_Select1st<std::pair<unsigned int const, unsigned int> >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, unsigned int> > >::_M_erase (this=0x8d8ae4c, __x=0x8d9e1a0) at /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c++/4.1.1/bits/stl_tree.h:1264 #10 0x006d4a6e in std::_Rb_tree<unsigned int, std::pair<unsigned int const, unsigned int>, std::_Select1st<std::pair<unsigned int const, unsigned int> >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, unsigned int> > >::_M_erase (this=0x8d8ae4c, __x=0x8d9df20) at /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c++/4.1.1/bits/stl_tree.h:1264 #11 0x006d4a6e in std::_Rb_tree<unsigned int, std::pair<unsigned int const, unsigned int>, std::_Select1st<std::pair<unsigned int const, unsigned int> >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, unsigned int> > >::_M_erase (this=0x8d8ae4c, __x=0x8d9d520) at /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c++/4.1.1/bits/stl_tree.h:1264 #12 0x006d4a6e in std::_Rb_tree<unsigned int, std::pair<unsigned int const, unsigned int>, std::_Select1st<std::pair<unsigned int const, unsigned int> >, std::less<unsigned int>, std::allocator<std::pair<unsigned int const, unsigned int> > >::_M_erase (this=0x8d8ae4c, __x=0x8d9c120) at /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c++/4.1.1/bits/stl_tree.h:1264 #13 0x006d4acd in ~_Rb_tree (this=0x8d8ae4c) at /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c++/4.1.1/bits/stl_tree.h:578 #14 0x006d4b29 in ~map (this=0x8d8ae4c) at /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c++/4.1.1/bits/stl_map.h:93 #15 0x006d0407 in ~Memory_Map (this=0x8d8ae28) at Memory_Map.cpp:75 #16 0x006d3ba8 in boost::checked_delete<libreverse::data_types::Memory_Map> (x=0x8d8ae28) at /usr/include/boost/checked_delete.hpp:34 #17 0x006d6645 in boost::detail::sp_counted_impl_p<libreverse::data_types::Memory_Map>::dispose (this=0x8d9e318) #18 0x0805e62c in boost::detail::sp_counted_base::release (this=0x8d9e318) at /usr/include/boost/detail/sp_counted_base_gcc_x86.hpp:145 #19 0x0805e66e in ~shared_count (this=0x8d89c38) at /usr/include/boost/detail/shared_count.hpp:159 #20 0x006d3024 in ~shared_ptr (this=0x8d89c34) at /usr/include/boost/shared_ptr.hpp:106 #21 0x00703c65 in ~File (this=0x8d89c28) at File.cpp:83 #22 0x0077c9bd in ~Elf_File (this=0x8d89c28) at ../../../../src/io/input/File_Readers/Elf/Elf_Header_Eident.h:10 #23 0x0077c9ed in boost::checked_delete<libreverse::elf_module::Elf_File<32u> > (x=0x8d89c28) at /usr/include/boost/checked_delete.hpp:34 #24 0x0077cb59 in boost::detail::sp_counted_impl_p<libreverse::elf_module::Elf_File<32u> >::dispose (this=0x8d9e788) at /usr/include/boost/detail/sp_counted_impl.hpp:76 #25 0x0805e62c in boost::detail::sp_counted_base::release (this=0x8d9e788) at /usr/include/boost/detail/sp_counted_base_gcc_x86.hpp:145 #26 0x0805e66e in ~shared_count (this=0x8d8b1b0) at /usr/include/boost/detail/shared_count.hpp:159 #27 0x00760b38 in ~shared_ptr (this=0x8d8b1ac) at /usr/include/boost/shared_ptr.hpp:106 #28 0x00769906 in ~Elf_Reader (this=0x8d8b1a8) at ../../../../src/io/input/File_Readers/Elf/Elf_Reader_T.cpp:44 #29 0x00760ffa in boost::checked_delete<libreverse::elf_module::Elf_Reader<32u> > (x=0x8d8b1a8) at /usr/include/boost/checked_delete.hpp:34 #30 0x0076ff35 in boost::detail::sp_counted_impl_p<libreverse::elf_module::Elf_Reader<32u> >::dispose (this=0x8d84410) at /usr/include/boost/detail/sp_counted_impl.hpp:76 #31 0x0805e62c in boost::detail::sp_counted_base::release (this=0x8d84410) at /usr/include/boost/detail/sp_counted_base_gcc_x86.hpp:145 #32 0x0805e66e in ~shared_count (this=0x8d8acd8) at /usr/include/boost/detail/shared_count.hpp:159 #33 0x00760a78 in ~shared_ptr (this=0x8d8acd4) at /usr/include/boost/shared_ptr.hpp:106 #34 0x00766ff7 in ~pair (this=0x8d8acd0) at /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c++/4.1.1/bits/stl_pair.h:69 #35 0x00767053 in __gnu_cxx::new_allocator<std::pair<std::string const, boost::shared_ptr<libreverse::io::File_Reader> > >::destroy (this=0xbff1b343, __p=0x8d8acd0) at /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c++/4.1.1/ext/new_allocator.h:107 #36 0x007672f1 in std::_Rb_tree<std::string, std::pair<std::string const, boost::shared_ptr<libreverse::io::File_Reader> >, std::_Select1st<std::pair<std::string const, boost::shared_ptr<libreverse::io::File_Reader> > >, std::less<std::string>, std::allocator<std::pair<std::string const, boost::shared_ptr<libreverse::io::File_Reader> > > >::destroy_node (this=0x8d8b184, __p=0x8d8acc0) at /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c++/4.1.1/bits/stl_tree.h:391 #37 0x00767384 in std::_Rb_tree<std::string, std::pair<std::string const, boost::shared_ptr<libreverse::io::File_Reader> >, std::_Select1st<std::pair<std::string const, boost::shared_ptr<libreverse::io::File_Reader> > >, std::less<std::string>, std::allocator<std::pair<std::string const, boost::shared_ptr<libreverse::io::File_Reader> > > >::_M_erase (this=0x8d8b184, __x=0x8d8acc0) at /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c++/4.1.1/bits/stl_tree.h:1266 #38 0x00767447 in ~_Rb_tree (this=0x8d8b184) at /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c++/4.1.1/bits/stl_tree.h:578 #39 0x007674a3 in ~map (this=0x8d8b184) at /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c++/4.1.1/bits/stl_map.h:93 #40 0x0075fbb0 in ~Reader_Factory (this=0x8d8b180) at Reader_Factory.cpp:16 #41 0x007612b8 in boost::checked_delete<libreverse::io::Reader_Factory> (x=0x8d8b180) at /usr/include/boost/checked_delete.hpp:34 #42 0x0076ff79 in boost::detail::sp_counted_impl_p<libreverse::io::Reader_Factory>::dispose (this=0x8d8b018) at /usr/include/boost/detail/sp_counted_impl.hpp:76 #43 0x0805e62c in boost::detail::sp_counted_base::release (this=0x8d8b018) at /usr/include/boost/detail/sp_counted_base_gcc_x86.hpp:145 #44 0x0805e66e in ~shared_count (this=0x868890) at /usr/include/boost/detail/shared_count.hpp:159 #45 0x00760a52 in ~shared_ptr (this=0x86888c) at /usr/include/boost/shared_ptr.hpp:106 #46 0x0075fab4 in __tcf_1 () at Reader_Factory.cpp:14 #47 0x47bdcbe9 in __cxa_finalize () from /lib/libc.so.6 #48 0x006b4303 in __do_global_dtors_aux () from /usr/local/lib/libreverse.so.0 #49 0x0079cb2c in _fini () from /usr/local/lib/libreverse.so.0 #50 0x47ba2572 in _dl_fini () from /lib/ld-linux.so.2 #51 0x47bdc939 in exit () from /lib/libc.so.6 #52 0x47bc6f34 in __libc_start_main () from /lib/libc.so.6 #53 0x0805cf41 in _start ()

3 4

Boost regex/ICU link problems on linux
by Gary M Ciany 30 Mar '07

30 Mar '07

I am having a problem getting the boost regex icu example code to link on linux. I am on Redhat Linux 9, using gcc 3.4.4. I downloaded the src ICU package and built and installed it as root in /usr/local with no problem. I downloaded boost_1_33_1 and got it to build and install with no problem. I first did a configure telling it where my ICU was located. As it built it stated it was being built with ICU in /usr/local/include. So now I got to build the regex/example code. There is a program under snippets/icu_example.cpp. I went into that example and forced the code to compile the main using the icu. By that I mean I took out the #ifdef BOOST_HAS_ICU and deleted the code around the main that printed "<NOTE>ICU support not enabled..." The code compiles, but when it goes to link I get all these unresolved external references..e.g. ../../../bin/boost/libs/regex/example/icu_example.test/gcc/debug/threading-multi/icu_example.0(.text+0x3e9): In function 'extract_greek(icu_3_6::UnicodeString const&)': snippets/icu_example.cpp:61 undefined reference to icu_3_6::UnicodeString::UnicodeString(unsigned short const*, int)' I get other cases where for example.. ../boost_1_33_1/boost/regex/icu.hpp:1001: Undefined reference to 'icu_3_6::UnicodeString::UnicodeString()' (It seems that maybe the prefix icu_3_6 is being added in the class resolution when creating this .o but was not used in the creation of the .a boost/icu libraries. ) Any idea how to fix this? Gary

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[lambda] logical operators related errors
by Dizzy 30 Mar '07

30 Mar '07

Hello I have the following testcase: #include <string> #include <iostream> #include <boost/lambda/lambda.hpp> #include <boost/bind.hpp> #include <boost/mem_fn.hpp> struct A { std::string s1, s2, s3; A(std::string const& s1_, std::string const& s2_, std::string const& s3_) :s1(s1_), s2(s2_), s3(s3_) {} }; void eval(bool val) { std::cout << "result: " << val << std::endl; } int main() { using boost::bind; using boost::mem_fn; A a1("str1", "str2", "str3"); A a2("str2", "str1", "str3"); eval(((bind(&A::s1, _1) < bind(&A::s1, _2)) && (bind(&A::s2, _1) < bind(&A::s2, _2)))(a1, a2)); } This errors compiling about operator&& no match found. I am trying to write a binary predicate (for a sort type algorithm) that should lexicographically compare the s1 field of the first argument with the corresponding one in the second argument, then compare the s2 fields similary (in this order). It does seem to work for the simpler case of just one "<" operation but doesn't seem to work when using "&&" on the results of "<". I was hoping there is an overloaded && that works on the functors returned by the overloaded < version. Can someone offer a working solution (possibly better looking than this one heh). Thanks! PS: For didactic reasons I specifically do not want to write the comparator manually but using lambda/bind composition and the like -- Mihai RUSU Email: dizzy(a)roedu.net GPG : http://dizzy.roedu.net/dizzy-gpg.txt WWW: http://dizzy.roedu.net "Linux is obsolete" -- AST

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Re: [Boost-users] about static lib of boost::regex
by llwaeva＠21cn.com 30 Mar '07

30 Mar '07

>Hi there, > I am writing a DLL under Windows with MSVC 2005. In my project, >boost:regex is involved. I do nothing but include the following in my >stdafx.h I try to compile the project with OPTION /MD,; however, the compile report that libboost_regex-vc80-mt-s-1_33_1.lib cannot be found. It fails to compile the project even I specify the path and library while compiling. What's going on? Thanks again.

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