June 2010 - Boost-users - lists.preview.boost.org

boostMPI asychronous communication
by Jack Bryan 01 Jul '10

01 Jul '10

Dear All: How to do asychronous communication among nodes by boot.MPI or OpenMPI in cluster ? I need to set up a kind of asychronous communication protocol such that message senders and receivers can communicate asychronously without losing anymessages between them. I do not want to use blocking MPI routines because the processors can do otheroperations when they wait for new messages coming. On boost.org, I donot find this kind of MPI routines that support this asychronous communication. Any help is appreciated. thanks Jack June 27 2010 _________________________________________________________________ The New Busy is not the too busy. Combine all your e-mail accounts with Hotmail. http://www.windowslive.com/campaign/thenewbusy?tile=multiaccount&ocid=PID28…

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Re: [Boost-users] [Serialization] Std::string's pointer can't beserialized.
by Pete Bartlett 01 Jul '10

01 Jul '10

[Snip program that already includes <boost/serialization/string.hpp>] >try #include <boost/serialization/string.hpp> >Robert Ramey Really? I thought that since std::string was a primitive type it simply couldn't be serialized through a pointer? Pete

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Boost 1.28.0 and Visual C++ 2010
by Gregory Tyler 01 Jul '10

01 Jul '10

Hi, I'm trying to migrate a Visual C++ 6 workspace to Visual C++ 2010. When I try to compile the resulting solution, I get error messages like these: Unknown compiler version - please run the configure tests and report the results With the help of this page... http://social.msdn.microsoft.com/forums/en-US/vcgeneral/thread/09fa47e5-6e9… ...I've traced the problem to a compiler version check in boost/config/compiler/visualc.hpp: #define BOOST_COMPILER "Microsoft Visual C++ version " BOOST_STRINGIZE(_MSC_VER) // // versions check: // we don't support Visual C++ prior to version 6: #if _MSC_VER < 1200 #error "Compiler not supported or configured - please reconfigure" #endif // // last known and checked version is 1301: #if (_MSC_VER > 1301) # if defined(BOOST_ASSERT_CONFIG) # error "Unknown compiler version - please run the configure tests and report the results" # else # pragma message("Unknown compiler version - please run the configure tests and report the results") # endif #endif According to this page... http://msdn.microsoft.com/en-us/library/b0084kay.aspx ... _MSC_VER for Visual C++ 2010 is 1600. If I were to modify the version checking code in visualc.hpp, then would you anticipate problems? For a variety of reasons, I would like to avoid upgrading Boost if at all possible. Thanks, Greg _________________________________________________________________ The New Busy think 9 to 5 is a cute idea. Combine multiple calendars with Hotmail. http://www.windowslive.com/campaign/thenewbusy?tile=multicalendar&ocid=PID2…

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Graph: create_subgraph not defined
by Trevor Harmon 30 Jun '10

30 Jun '10

Hi, I've extended an adjacency list into a custom class in order to add specialized fields and convenience methods. It was working fine until I tried to call create_subgraph on it. Simplified example: #include <boost/graph/adjacency_list.hpp> #include <boost/graph/subgraph.hpp> using namespace boost; class MyGraph : public adjacency_list<vecS, vecS, bidirectionalS, size_t, property<edge_index_t, std::size_t> > { }; int main(int,char*[]) { MyGraph g; g.create_subgraph(); return 0; } This gives a compiler error: mygraph.cpp:12: error: ‘class MyGraph’ has no member named ‘create_subgraph’ I've no idea why this is giving me an error. Any suggestions? Thanks, Trevor

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Re: [Boost-users] Xcode - Slow
by Robert Lupton the Good 30 Jun '10

30 Jun '10

> But then I noticed something strange. Using Xcode, > > resultmatrix = prod(matrix1,matrix2); > > is 10 to 16 times slower (with 100x100 matrixes) than simply doing something like that: What version of Xcode? For a long time xcode provided g++ 4.0.X (or was it 4.1.X?) --- anyway, versions of g++ before 4.2 didn't do a good job with complex templates. R

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Xcode - Slow
by Raphaël Amiot 30 Jun '10

30 Jun '10

Hello there. I am implementing matrix multiplication and am trying to have my stuff run as fast as possible. But then I noticed something strange. Using Xcode, resultmatrix = prod(matrix1,matrix2); is 10 to 16 times slower (with 100x100 matrixes) than simply doing something like that: for(...) for(...) for(..) multiply_things(); And 20 to 40 times slower than a simple threaded approach. Using visual studio, it's 2 times faster than naive multiplication. This is on a release build, with #define BOOST_UBLAS_NDEBUG 1 #define NDEBUG 1 So what gives?

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[Boost.PropertyTree] Storing pointers and writing data with parser.
by Jani Plesnicar 30 Jun '10

30 Jun '10

Hy i am trying to store pointers in Property Tree and when i do need to write to some parser data i want to write data to which is "connected" with that pointer. because if i do xml_parser::write_xml(std::cout, _pt_root) i get pointers not the data to which is each leaf pointing to. Thank you in advance.

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[Serialization] Std::string's pointer can't be serialized.
by Moch Ramis 30 Jun '10

30 Jun '10

Hello. I recently try to use boost.Serialization and it works fine until i try to serialize a string pointer. With a string pointer, the compiler (gcc 4.4.1) can't resolve a type and print the error: "error: ‘struct std::basic_string<char, std::char_traits<char>, std::allocator<char> >’ has no member named ‘serialize’" Here a schoolish example that fails to compile: ______________________________________________________ #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> #include <boost/serialization/string.hpp> #include <fstream> #include <string> int main() { std::string* s=new std::string("some text"); std::ofstream of("file.txt"); { boost::archive::text_oarchive oa(of); // write class instance to archive oa << s; // archive and stream closed when destructors are called } delete s; return 0; } __________________________________________________________ and the gcc output is: -------------- Build: Debug in Boost_Serialize_Test --------------- Compiling: main.cpp In file included from /usr/include/boost/serialization/split_member.hpp:23, from /usr/include/boost/serialization/nvp.hpp:33, from /usr/include/boost/serialization/serialization.hpp:17, from /usr/include/boost/archive/detail/oserializer.hpp:61, from /usr/include/boost/archive/detail/interface_oarchive.hpp:24, from /usr/include/boost/archive/detail/common_oarchive.hpp:20, from /usr/include/boost/archive/basic_text_oarchive.hpp:32, from /usr/include/boost/archive/text_oarchive.hpp:31, from /.../main.cpp:2: /usr/include/boost/serialization/access.hpp: In static member function ‘static void boost::serialization::access::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::text_oarchive, T = std::basic_string<char, std::char_traits<char>, std::allocator<char> >]’: /usr/include/boost/serialization/serialization.hpp:74: instantiated from ‘void boost::serialization::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::text_oarchive, T = std::basic_string<char, std::char_traits<char>, std::allocator<char> >]’ /usr/include/boost/serialization/serialization.hpp:133: instantiated from ‘void boost::serialization::serialize_adl(Archive&, T&, unsigned int) [with Archive = boost::archive::text_oarchive, T = std::basic_string<char, std::char_traits<char>, std::allocator<char> >]’ /usr/include/boost/archive/detail/oserializer.hpp:140: instantiated from ‘void boost::archive::detail::oserializer<Archive, T>::save_object_data(boost::archive::detail::basic_oarchive&, const void*) const [with Archive = boost::archive::text_oarchive, T = std::basic_string<char, std::char_traits<char>, std::allocator<char> >]’ /.../main.cpp:87: instantiated from here /usr/include/boost/serialization/access.hpp:109: error: ‘struct std::basic_string<char, std::char_traits<char>, std::allocator<char> >’ has no member named ‘serialize’ Process terminated with status 1 (0 minutes, 4 seconds) 1 errors, 0 warnings ---------------------------------------------------------------------------------- I also tried this one codepad. you could see the result here: http://codepad.org/QnR0mMVs I don't know if it's an issue or if i'm using serialize the wrong way but i would need to serialize strings pointers. Best regards Mocramis

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[Boostbook] Navigation links
by Carlos Guimarães 30 Jun '10

30 Jun '10

Hi, I have several .*qbk files that I build in separated folders, each one with is own index.html. However, I couldn't make that one of them to be the main root so when I click in home button it goes to the main root, independently from which file I am. I could only manage to get up and home button to go to file's own index. There's any solution for this or I must build everything in the same file? This is my jamfile: project doc ; import boostbook : boostbook ; xml mainXml : src/main.qbk ; xml clientXml : src/app/client.qbk ; xml serverXml : src/app/server.qbk ; boostbook main_base : mainXml : <xsl:param>boost.image.src="./images/logo.png" <xsl:param>boost.image.w=100 <xsl:param>boost.image.h=100 <xsl:param>nav.layout=none <xsl:param>base.dir=../doc/html/ <xsl:param>root.filename=index <xsl:param>html.stylesheet=./style.css <xsl:param>generate.manifest=0 ; boostbook client : clientXml : <xsl:param>boost.image.src="./../../images/logo.png" <xsl:param>boost.image.w=100 <xsl:param>boost.image.h=100 <xsl:param>nav.layout=none <xsl:param>base.dir=../doc/html/app/client/ <xsl:param>root.filename=index <xsl:param>html.stylesheet=./../../style.css <xsl:param>generate.manifest=0 ; boostbook server : serverXml : <xsl:param>boost.image.src="./../../images/logo.png" <xsl:param>boost.image.w=100 <xsl:param>boost.image.h=100 <xsl:param>nav.layout=none <xsl:param>base.dir=../doc/html/app/server/ <xsl:param>root.filename=index <xsl:param>html.stylesheet=./../../style.css <xsl:param>generate.manifest=0 ;

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[Serialization] assert in void_caster
by Alex Parkhomenko 29 Jun '10

29 Jun '10

Hello, I have the static library with two classes, "base" and "derived". class base { public: base():a(0){}; virtual ~base(){}; private: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & a; } private: int a; }; class derived: public base { public: derived():b(0){}; virtual ~derived(){}; private: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & boost::serialization::base_object<base>(*this); ar & b; } private: int b; }; This static library is linked to two dynamic libraries. For example, dll_a.dll and dll_b.dll. When I try to load those dlls in my application (via LoadLibrary), I get assert in void_cast.cpp (225): std::pair<void_cast_detail::set_type::const_iterator, bool> result; result = s.insert(this); assert(result.second); Is it by design? Or I missed something? I am using boost v1.43 and VS 10 on Windows 7. Thank you in advance. Alex

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