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Boost.Numeric.Interval: Please specify rounding control mechanism.
by Andreas Fabri 09 Feb '07

09 Feb '07

Hello, I use boost_1_33_1 with VC8 on a XP64 Turion system, and get an error message C:/cygwin/usr/include/boost-1_33_1\boost/numeric/interval/hw_rounding.hpp(34) : fatal error C1189: #error : Boost.Numeric.Interval: Please specify rounding control mechanism. What shall I do? Any help would be appreciated. andreas

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[boost-users] [interprocess] Using semaphores to synchronize startup
by Lars Hagström 09 Feb '07

09 Feb '07

Hi, I am trying to use Boost.Interprocess to get N processes (senders) to send data to one receiver through shared memory. The receiver has to be the one that initializes the shared memory, so no senders can be "let in" before the receiver has completed initialization. I can't guarantee the order that the processes are starting in. To do this I have both the receiver and the senders create_or_open a named_semaphore with 0 as initial value. The senders then immediately do a wait on the semaphore, but the receiver goes ahead and initializes the memory and then does a post on the semaphore. This lets the first sender in, which can then initialize itself and then do a post on the semaphore and start running. The second sender is then let in (because of the post) and it can get going and so on. This approach works very well if the semaphore has been manually deleted from /dev/shm/ or c:\temp\boost_interprocess\, but will not work if there is an old semaphore around. I can get around this on Windows by doing a named_semaphore::remove, since that will fail if a process has got it loaded. But this same code will not work on linux, since the semaphore will be unlinked and then all the processes will be able to delete the semaphore and will then be using different semaphores! I am used to semaphores working so that if it is opened when noone has it loaded it will be initialized to some known value, but this does not appear to be the case with Boost.Interprocess semaphores? Is there something obvious that I've missed, or some other way of accomplishing the same thing? Cheers Lars

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Serialization of pointers with custom allocators
by Anders Sundman 09 Feb '07

09 Feb '07

Hi! Is it possible to serialize a class A by pointer using a custom allocator? (Not the custom in-place allocator approach). I'm trying to serialize the (OpenCV) class IplImage. The class is used like this: IplImage* img = cvCreateImage(...); ... cvReleaseImage(&img); I've tried the following: template<class Archive> inline void load_construct_data(Archive & ar, IplImage * img, const unsigned int file_version){ ... IplImage* tmpImg = cvCreateImage(...); memcpy(img, tmpImg, sizeof(IplImage)); } But I get exceptions later, when releasing the loaded image. As far as I can tell, the image class data is identical before and after serialization, so I guess that the cvCreateImage/cvReleaseImage keep track of pointers somehow and things go bad when the ReleaseImage is called by a pointer not returned by the CreateImage function? Can the allocation of the IplImage used as input to load_construct_data be customized somehow? I also tried using an IplImage * & as input to load_construct_data: template<class Archive> inline void load_construct_data(Archive & ar, _IplImage * & img, const unsigned int file_version){ _IplImage* tmpImg = cvCreateImage(...); delete img; img = tmpImg; } But that screws up the (de)serialization. Any suggestions or thoughts anyone? // Anders Sundman

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Re: [Boost-users] [Serialization] Linking Error in the Latest CVS
by Wu Yinghui, Freddie 09 Feb '07

09 Feb '07

> OK - I checked in a small change in Jamfile.v2 of the build directory which > I believe my address this. > > Robert Ramey Thanks, Robert, for checking in the update. But I don't think that fixes the problem. (Indeed, rebuilding Boost with the update still gave me exactly the same errors.) The problems, I think, is that codecvt_null.cpp was compiled, and linked to produce boost_serialization_....dll/.lib. But I found that the codecvt_null class's methods are mysteriously missing from the resulting .dll/.lib. So when boost_wserialization_....dll/.lib links with boost_serialization....lib, all codecvt_null-related symbols are not found. I don't understand why, but turning /VERBOSE on for the linker showed that the linker somehow discarded the codecvt_null-related symbols when producing the boost_serialization....dll. > Wu Yinghui, Freddie wrote: >> Hi all, >> >> I posted a question regarding usage of BJam V2 in building the latest >> Boost checked out from the CVS >> (http://lists.boost.org/boost-users/2007/02/25201.php) But there >> seems to be no interest in explaining that at all so far. >> >> But I've sort of worked out most of the solution so far (though mostly >> hacking around in the .jam files, which I suppose could have been >> done a lot easier by someone more familiar with the building system). >> Still I failed to build the Boost.Serialization library out-of-box. >> >>> My system: Windows XP Pro SP2 >>> Compiler: MSVC 7.1 >> The errors I met was something like this: >> =====snip===== >> Creating library >> bin.v2\libs\serialization\build\msvc-7.1\release\instruction >> -set-pentium4\qt3support-on\stdlib-stlport\threading-multi\boost_wserialization- >> vc71-mt-p-1_35.lib and object >> bin.v2\libs\serialization\build\msvc-7.1\release\i >> nstruction-set-pentium4\qt3support-on\stdlib-stlport\threading-multi\boost_wseri >> alization-vc71-mt-p-1_35.exp >> basic_text_wiprimitive.obj : error LNK2001: unresolved external symbol >> "private: >> virtual enum stlp_std::codecvt_base::result __thiscall >> boost::archive::codecvt_ >> null<wchar_t>::do_in(int &,char const *,char const *,char const * >> &,wchar_t *,wc >> har_t *,wchar_t * &)const " >> (?do_in@?$codecvt_null@_W@archive@boost@@EBE?AW4resu >> lt@codecvt_base@stlp_std@@AAHPBD1AAPBDPA_W3AAPA_W@Z) >> basic_text_woprimitive.obj : error LNK2001: unresolved external symbol >> "private: >> virtual enum stlp_std::codecvt_base::result __thiscall >> boost::archive::codecvt_ >> null<wchar_t>::do_in(int &,char const *,char const *,char const * >> &,wchar_t *,wc >> har_t *,wchar_t * &)const " >> (?do_in@?$codecvt_null@_W@archive@boost@@EBE?AW4resu >> lt@codecvt_base@stlp_std@@AAHPBD1AAPBDPA_W3AAPA_W@Z) >> binary_wiarchive.obj : error LNK2001: unresolved external symbol >> "private: virtu >> al enum stlp_std::codecvt_base::result __thiscall >> boost::archive::codecvt_null<w >> char_t>::do_in(int &,char const *,char const *,char const * &,wchar_t >> *,wchar_t >> *,wchar_t * &)const " >> (?do_in@?$codecvt_null@_W@archive@boost@@EBE?AW4result@cod >> ecvt_base@stlp_std@@AAHPBD1AAPBDPA_W3AAPA_W@Z) >> binary_woarchive.obj : error LNK2001: unresolved external symbol >> "private: virtu >> al enum stlp_std::codecvt_base::result __thiscall >> boost::archive::codecvt_null<w >> char_t>::do_in(int &,char const *,char const *,char const * &,wchar_t >> *,wchar_t >> *,wchar_t * &)const " >> (?do_in@?$codecvt_null@_W@archive@boost@@EBE?AW4result@cod >> ecvt_base@stlp_std@@AAHPBD1AAPBDPA_W3AAPA_W@Z) >> =====snip===== >> >> I tried >> dumpbin /all >> bin.v2\libs\serialization\...\boost_serialization-vc71-mt-p-1_35.lib >> >> And indeed, it seems that codecvt_null object's methods were missing >> from the library. Any hints on how I can fix this problem? >> >> Cheers, >> >> Freddie -- Wu Yinghui, Freddie Senior Software Engineer Advanced Technology Research and Development Group Volume Interactions Pte Ltd 1 Kim Seng Promenade #12-01 Great World City East Tower Singapore 237994 Tel: +65 62226962 (Ext 216) Fax: +65 62226215 Email: yhwu(a)volumeinteractions.com URL: http://www.volumeinteractions.com http://www.dextroscope.com Important: This message is intended for the recipient(s) addressed above. It contains privileged and confidential information. If you are not the intended recipient, please notify the sender immediately by replying to this message and then delete it from your system. You must not read, copy, use, or disseminate this communication in any form. Thank you.

1 0

[Serialization] Linking Error in the Latest CVS
by Wu Yinghui, Freddie 09 Feb '07

09 Feb '07

Hi all, I posted a question regarding usage of BJam V2 in building the latest Boost checked out from the CVS (http://lists.boost.org/boost-users/2007/02/25201.php) But there seems to be no interest in explaining that at all so far. But I've sort of worked out most of the solution so far (though mostly hacking around in the .jam files, which I suppose could have been done a lot easier by someone more familiar with the building system). Still I failed to build the Boost.Serialization library out-of-box. > My system: Windows XP Pro SP2 > Compiler: MSVC 7.1 The errors I met was something like this: =====snip===== Creating library bin.v2\libs\serialization\build\msvc-7.1\release\instruction -set-pentium4\qt3support-on\stdlib-stlport\threading-multi\boost_wserialization- vc71-mt-p-1_35.lib and object bin.v2\libs\serialization\build\msvc-7.1\release\i nstruction-set-pentium4\qt3support-on\stdlib-stlport\threading-multi\boost_wseri alization-vc71-mt-p-1_35.exp basic_text_wiprimitive.obj : error LNK2001: unresolved external symbol "private: virtual enum stlp_std::codecvt_base::result __thiscall boost::archive::codecvt_ null<wchar_t>::do_in(int &,char const *,char const *,char const * &,wchar_t *,wc har_t *,wchar_t * &)const " (?do_in@?$codecvt_null@_W@archive@boost@@EBE?AW4resu lt@codecvt_base@stlp_std@@AAHPBD1AAPBDPA_W3AAPA_W@Z) basic_text_woprimitive.obj : error LNK2001: unresolved external symbol "private: virtual enum stlp_std::codecvt_base::result __thiscall boost::archive::codecvt_ null<wchar_t>::do_in(int &,char const *,char const *,char const * &,wchar_t *,wc har_t *,wchar_t * &)const " (?do_in@?$codecvt_null@_W@archive@boost@@EBE?AW4resu lt@codecvt_base@stlp_std@@AAHPBD1AAPBDPA_W3AAPA_W@Z) binary_wiarchive.obj : error LNK2001: unresolved external symbol "private: virtu al enum stlp_std::codecvt_base::result __thiscall boost::archive::codecvt_null<w char_t>::do_in(int &,char const *,char const *,char const * &,wchar_t *,wchar_t *,wchar_t * &)const " (?do_in@?$codecvt_null@_W@archive@boost@@EBE?AW4result@cod ecvt_base@stlp_std@@AAHPBD1AAPBDPA_W3AAPA_W@Z) binary_woarchive.obj : error LNK2001: unresolved external symbol "private: virtu al enum stlp_std::codecvt_base::result __thiscall boost::archive::codecvt_null<w char_t>::do_in(int &,char const *,char const *,char const * &,wchar_t *,wchar_t *,wchar_t * &)const " (?do_in@?$codecvt_null@_W@archive@boost@@EBE?AW4result@cod ecvt_base@stlp_std@@AAHPBD1AAPBDPA_W3AAPA_W@Z) =====snip===== I tried dumpbin /all bin.v2\libs\serialization\...\boost_serialization-vc71-mt-p-1_35.lib And indeed, it seems that codecvt_null object's methods were missing from the library. Any hints on how I can fix this problem? Cheers, Freddie -- Wu Yinghui, Freddie Senior Software Engineer Advanced Technology Research and Development Group Volume Interactions Pte Ltd 1 Kim Seng Promenade #12-01 Great World City East Tower Singapore 237994 Tel: +65 62226962 (Ext 216) Fax: +65 62226215 Email: yhwu(a)volumeinteractions.com URL: http://www.volumeinteractions.com http://www.dextroscope.com Important: This message is intended for the recipient(s) addressed above. It contains privileged and confidential information. If you are not the intended recipient, please notify the sender immediately by replying to this message and then delete it from your system. You must not read, copy, use, or disseminate this communication in any form. Thank you.

2 1

FW: Question about Boost.Test
by Ranji Raghavan 09 Feb '07

09 Feb '07

Folks - I would appreciate any help for the following question .. _____ From: Ranji Raghavan [mailto:ranji.raghavan@openspirit.com] Sent: Tuesday, February 06, 2007 10:23 AM To: 'boost-test(a)emailaccount.com' Subject: Question about Boost.Test Hello Gennadiy - I have been asked recently to investigate an UNIT testing tool for our C++ framework we have and have taken a quick stab at cppUnit, CxxTest and I am currently looking into Boost.Test. I have a fair bit of experience in JUnit and MbUnit/NUnit that we have used to unit test the JAVA & .NET version of the same application. What we are trying to accomplish (and have accomplished for JAVA & .NET versions at least) is to have all our test cases defined in XML files - this way we have the same inputs for the .NET, JAVA & C++ versions of our application. JUnit & MbUnit have the capability that allows me to feed different data sets (1000's of them in some case) to the same test method. Delving into cppUnit & CxxTest, I could not find any pragmatic way to feed disparate data sets to the same test method - or at least that's what I gather from what little I could decipher. But looking at Boost.Test I did find BOOST_PARAM_CLASS_TEST_CASE( test_class_method_pointer, first_parameter, last_parameter ) method that caught my attention. The question I have for you is this: Can I pass an instance of a class (that contains all the requisite data I parsed from the XML file) to a test method. For example - class my_complex_test { void test_assignment( can this be an instance of a class? ) { ... } }; ... std::list<can this be a list that holds instances of a class> possible_xmlvalues; ts->add( BOOST_PARAM_CLASS_TEST_CASE( &my_complex_test::test_assignment, possible_xmlvalues.begin(), possible_xmlvalues.end() ) ); Any help you can render will be greatly appreciated. Thanks Ranji Raghavan

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[Serialization] Problems Getting Started
by Jeffrey Brent McBeth 09 Feb '07

09 Feb '07

It seems that most people are getting past this, but I have been unable to get serialization to get to work on even simple classes. A search of the last three months' archives and google didn't turn up anything obvious, so I am relying on your good humor. When I try to compile a (I think simple) class like #include <fstream> #include <boost/serialization/string.hpp> #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> class Card { public: Card():name("Icky"){} private: std::string name; friend class boost::serialization::access; template <class Archive> void serialize(Archive &ar, const unsigned int version) { ar & name; } }; int main(int argc, char *argv[]) { const Card Howdy; std::ofstream ofs("Foo"); boost::archive::text_oarchive oa(ofs); oa << Howdy; } I get myriad errors mcbeth@sirocco ~/tmp/blah $ g++ blah.cpp -lboost_serialization /usr/include/boost/archive/detail/oserializer.hpp: In constructor 'boost::archive::detail::oserializer<Archive, T>::oserializer() [with Archive = boost::archive::text_oarchive, T = Card]': /usr/include/boost/archive/detail/oserializer.hpp:135: instantiated from 'static boost::archive::detail::oserializer<Archive, T>& boost::archive::detail::oserializer<Archive, T>::instantiate() [with Archive = boost::archive::text_oarchive, T = Card]' /usr/include/boost/archive/detail/oserializer.hpp:264: instantiated from 'static void boost::archive::detail::save_non_pointer_type<Archive, T>::save_standard::invoke(Archive&, const T&) [with Archive = boost::archive::text_oarchive, T = Card]' /usr/include/boost/archive/detail/oserializer.hpp:322: instantiated from 'static void boost::archive::detail::save_non_pointer_type<Archive, T>::invoke(Archive&, const T&) [with Archive = boost::archive::text_oarchive, T = Card]' /usr/include/boost/archive/detail/oserializer.hpp:536: instantiated from 'void boost::archive::save(Archive&, const T&) [with Archive = boost::archive::text_oarchive, T = Card]' /usr/include/boost/archive/basic_text_oarchive.hpp:78: instantiated from 'void boost::archive::basic_text_oarchive<Archive>::save_override(T&, int) [with T = const Card, Archive = boost::archive::text_oarchive]' /usr/include/boost/archive/detail/interface_oarchive.hpp:78: instantiated from 'Archive& boost::archive::detail::interface_oarchive<Archive>::operator<<(T&) [with T = const Card, Archive = boost::archive::text_oarchive]' blah.cpp:26: instantiated from here /usr/include/boost/archive/detail/oserializer.hpp:107: error: incomplete type 'boost::serialization::extended_type_info_null<Card>' used in nested name specifier /usr/include/boost/archive/detail/oserializer.hpp: In member function 'bool boost::archive::detail::oserializer<Archive, T>::is_polymorphic() const [with Archive = boost::archive::text_oarchive, T = Card]': blah.cpp:26: instantiated from here /usr/include/boost/archive/detail/oserializer.hpp:131: error: invalid use of undefined type 'struct boost::serialization::extended_type_info_null<Card>' /usr/include/boost/serialization/type_info_implementation.hpp:26: error: declaration of 'struct boost::serialization::extended_type_info_null<Card>' /usr/include/boost/archive/detail/oserializer.hpp:132: error: invalid use of undefined type 'struct boost::serialization::extended_type_info_null<Card>' /usr/include/boost/serialization/type_info_implementation.hpp:26: error: declaration of 'struct boost::serialization::extended_type_info_null<Card>' The relevant bit seems to be that extended_type_info_null<Card> is an incomplete type, which would point to me missing an important header or something. Relevant details Fails on (with slightly different wording but same errors) Gentoo Linux, g++-4.1.1, Boost 1.33.1 Gentoo Linux, g++-3.4.6, Boost 1.33.1 Max OSX (Tiger), g++-4.0.1, Boost 1.33.1 Max OSX (Tiger), g++-3.3, Boost 1.33.1 If needed, I can try it out on a WinXP box with VS2003 in about 7 hours. Thanks again for your patience Jeff -- ---------------------------------------------------------------------------- Computer Science is as much about computers as astronomy is about telescopes -- Edsger Wybe Dijkstra (1930-2002) ----------------------------------------------------------------------------

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container traits information
by abir basak 08 Feb '07

08 Feb '07

Hi, Is there any boost utility which statically determines if a template parameter is const or not? ( MPL library ?) I need to design something like boost::sub_range, but little different (It will iterate over arbitrary sequence stored in a vector form, rather than a sequence stored in pair form). like, template<typename C> class index_range{ private: C* container_; std::vector<size_type> index_; }; container & index will be passed through constructor. Now if C is const container it will return const_reference etc. Thus what is needed is something like, container_traits<const std::vector>::iterator is a const_iterator while container_traits<std::vector>::iterator is a iterator etc. Thank you for any kind of help. -- Abir Basak, Member IEEE Software Engineer, Read Ink Technologies B. Tech, IIT Kharagpur email: abir(a)abirbasak.com homepage: www.abirbasak.com

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Re: [Boost-users] [Serialization] Undefined reference to... (header or compilation problem)
by misha＠gildia.pl 08 Feb '07

08 Feb '07

> add the "const" > > Read the "rationale" section of the documentation for an explanation. > > Robert Ramey > > > int main() { > > > > > > > > > > const Vertex v1(1.5, 2.5); // add "const" here > > std::ofstream ofs("myfile.vtx"); > > > > boost::archive::text_oarchive oa(ofs); > > > > oa << v1; > > ofs.close(); > > > > > > > > return 0; > > } > > I'm sorry, "const" did not help. I'm almost positive it's missing libs or something similar, cause I get same errors compiling "bus stops" demo (demo.cpp) from boost tutorial. Thx for your time ! Regards Misha

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Building on Windows
by Stephen Torri 08 Feb '07

08 Feb '07

Does someone have a tutorial or instructions that step-by-step telling me how to compile boost for Windows XP? I have Visual Studio 2005 installed. Stephen

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