- Boost-users - lists.boost.org

[Serialization] Problem serialization of derived classes
by Andreas Willich 09 Aug '07

09 Aug '07

Hi there! I have a problem with the code in the attachment. I followed the documentation and the examples, but I did not get the code to work. Gcc produces a lot of failures that something is already instantiated in header files of the serialization library. Has someone a idea what I am doing wrong? My gcc version is 4.1.1-r3 and I am working on a gentoo x86 box. Andreas Willich

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is asio's io_service required for any socket related call?
by pete＠mu.org 09 Aug '07

09 Aug '07

Hi, I 've been doinking around with asio for a few weeks, and I've run into an issue I can't seem to wrap my head around. I've been playing with some code that originally was meant to pound a server with a large amount of packets for benchmarking purposes. It uses threads to launch hundreds of threads per second. When I replaced the old socket code with asio, and used a single io_service with run being called within each thread, I run out of file descriptors very quickly, and if I use a single io_service within each thread it's the same thing but the performance seems worse. Needless to say, this seems like a real limitation and I'm hoping I'm just being limited by my own misunderstanding, because I'm really enjoying the portability of asio. The docs that are there seem great, but there seems to be a lot more the library can do that I am missing out on, and I think the docs seem like they are not mentioning a lot of what asio an do. Can someone point me in the right direction for launching 1-to-N threads with a single send_to and a single receive_from within each thread that doesn't take the hit I'm seeing? It seems to me, that it's obvious that the io-service design is the difference, because I don't get the issue at all when I use plain old sockets, and the OS thread limit is then the only limitation. Any help would be greatly appreciated. FYI, I've done most of my experimenting on Linux and OSX. Thanks, Pete

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boost.thread library and the thread is running
by Mirosław Makowiecki 09 Aug '07

09 Aug '07

Is it boost.thread library have a ability by next of its I is allowed to find out what it is running? How do it? Thanks in advice.

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Re: [Boost-users] [boost::fusion v2 and xpressive] versioning conflicts...
by Ovanes Markarian 09 Aug '07

09 Aug '07

Eric, many thanks for you help. I will try doing it until Monday. Some additional question: fusion v2 will be a separate lib, so the path boost/fusion instead of boost/spirit/fusion is fine? With Kind Regards, Ovanes Markarian On Thu, August 9, 2007 21:02, Eric Niebler wrote: > > Ovanes Markarian wrote: >> Hello, >> >> I am using fusion v2 in my project and first would like to thank for the great lib. I installed this lib into the boost/fusion directory. >> >> Today I started using xpressive lib (which is also a great one!!!). Unfortunately xpressive broke >> my compilation, because it includes things from boost/spirit/fusion and my code includes headers from boost/fusion. Now my assumption: AFAIK spirit/fusion contains version 1. Since I would like to use version 2 I can not simply copy it into the spirit directory, since it can break other things like wave. Is it correct? If yes, does anyone have suggestions on how I should deal with this issues? > > > I can infer from this that you're using boost 1.34.1 or earlier, and you've copied boost.fusion from svn HEAD into the tree, right? Xpressive isn't expecting to find Fusion v2 in Boost 1.34, hence the problem. You'll need to hack on xpressive a bit to make this work. In > xpressive_fwd.hpp, you should add something like > > #if BOOST_VERSION >= 103500 > #ifndef BOOST_XPRESSIVE_FUSION_V2 > #define BOOST_XPRESSIVE_FUSION_V2 > #endif > #endif > > Then everywhere xpressive conditionally includes fusion v1 or v2, you should check BOOST_XPRESSIVE_FUSION_V2 instead of the boost version. You'll need to do something similar in proto_fwd.hpp (#define > BOOST_PROTO_FUSION_V2) and all of proto's headers. Then you'll be ableto force the issue by compiling with BOOST_XPRESSIVE_FUSION_V2 and > BOOST_PROTO_FUSION_V2 defined. > > If you do all this and submit a patch, I'll accept it. > > > -- > Eric Niebler > Boost Consulting > www.boost-consulting.com > > The Astoria Seminar ==> http://www.astoriaseminar.com > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > With Kind Regards, Ovanes Markarian

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Subject: [Serialization] Why is it not possible to serialize this structure through a pointer?
by Oliver Kania 09 Aug '07

09 Aug '07

Hello, I have the following struct: struct CUBE_INFO { friend class boost::serialization::access; long cube; std::string ncube; UINT number_dimensions; DIMENSION_LIST dimensions; long double number_cells; long double number_filled_cells; enum STATUS { UNLOADED = 0, LOADED, CHANGED } status; enum TYPE { NORMAL = 0, SYSTEM, ATTRIBUTE } type; friend std::istream& operator>>( std::istream& in, CUBE_INFO& cubeInfo ); friend std::ostream& operator<<( std::ostream& out, const CUBE_INFO& cubeInfo ); private: template<class Archive> void serialize( Archive &ar, const unsigned int version ) { ar & cube; ar & dimensions; ar & ncube; ar & number_cells; ar & number_dimensions; ar & number_filled_cells; ar & status; ar & type; } }; here, DIMENSION_LIST is an STL-vector of longs. I am including #include <boost/serialization/vector.hpp> #include <boost/serialization/access.hpp> I try to comple the code below (MS VisualStudio 8, boost 1.34) #include <fstream> #include <boost/archive/text_oarchive.hpp> #include <boost/archive/text_iarchive.hpp> #include <string> #include "../Palo/Cache/AbstractCache.h" #include "../Palo/Cache/CubeCache.h" #include "../Palo/Cache/CubesCache.h" #include "../Palo/types.h" using namespace jedox::palo; int main(int argc, char* argv[]) { //string filename("SerializeTest"); CUBE_INFO* c = new CUBE_INFO(); std::ofstream ofs("filename"); //std::ofstream ofs("filename" ); // save data to archive { boost::archive::text_oarchive oa( ofs ); // write class instance to archive oa << ( c ); // archive and stream closed when destructors are called } return 0; } The resulting error message is: >f:\lib\x32\include\boost\archive\detail\oserializer.hpp(567) : error C2027: use of undefined type 'boost::STATIC_ASSERTION_FAILURE<x>' 1> with 1> [ 1> x=false 1> ] 1> f:\lib\x32\include\boost\archive\basic_text_oarchive.hpp(78) : see reference to function template instantiation 'void boost::archive::save<Archive,T>(Archive &,T &)' being compiled 1> with 1> [ 1> Archive=boost::archive::text_oarchive, 1> T=jedox::palo::CUBE_INFO * 1> ] regards, Oliver

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[boost::fusion v2 and xpressive] versioning conflicts...
by Ovanes Markarian 09 Aug '07

09 Aug '07

Hello, I am using fusion v2 in my project and first would like to thank for the great lib. I installed this lib into the boost/fusion directory. Today I started using xpressive lib (which is also a great one!!!). Unfortunately xpressive broke my compilation, because it includes things from boost/spirit/fusion and my code includes headers from boost/fusion. Now my assumption: AFAIK spirit/fusion contains version 1. Since I would like to use version 2 I can not simply copy it into the spirit directory, since it can break other things like wave. Is it correct? If yes, does anyone have suggestions on how I should deal with this issues? Detailed compiler errors: E:\libraries\boost\include\boost/fusion/support/detail/access.hpp(24) : error C2953: 'boost::fusion::detail::ref_result' : class template has already been defined E:\libraries\boost\include\boost/spirit/fusion/detail/access.hpp(23) : see declaration of 'boost::fusion::detail::ref_result' E:\libraries\boost\include\boost/fusion/support/detail/access.hpp(34) : error C2953: 'boost::fusion::detail::cref_result' : class template has already been defined E:\libraries\boost\include\boost/spirit/fusion/detail/access.hpp(29) : see declaration of 'boost::fusion::detail::cref_result' E:\libraries\boost\include\boost/fusion/support/detail/access.hpp(40) : error C2953: 'boost::fusion::detail::non_ref_parameter' : class template has already been defined E:\libraries\boost\include\boost/spirit/fusion/detail/access.hpp(37) : see declaration of 'boost::fusion::detail::non_ref_parameter' E:\libraries\boost\include\boost/fusion/support/detail/access.hpp(52) : error C2953: 'boost::fusion::detail::call_param' : class template has already been defined E:\libraries\boost\include\boost/spirit/fusion/detail/access.hpp(43) : see declaration of 'boost::fusion::detail::call_param' With Kind Regards, Ovanes Markarian

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BoostBook survey.
by Rene Rivera 09 Aug '07

09 Aug '07

If any of you follow the wxWidgets dev list you might have noticed they are thinking of changing doc format. I pointed out BoostBook as a possibility. Obviously they would like to see non-Boost uses of BoostBook. So I'm asking the wonderfully varied Boost user community... * Do you use BoostBook in some way? * If so, could you provide an example of how you use it? If you want I can find a place in our growing list of Boost users <http://www.boost.org/doc/html/who_s_using_boost_.html>. -- -- Grafik - Don't Assume Anything -- Redshift Software, Inc. - http://redshift-software.com -- rrivera/acm.org - grafik/redshift-software.com -- 102708583/icq - grafikrobot/aim - grafikrobot/yahoo

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Re: [Boost-users] Boost-users Digest, Vol 1352, Issue 1
by Pranckevicius, Tadas 09 Aug '07

09 Aug '07

> I think I know which ones. These are cryptic error messages. They > happened in my case because of the include order. > I work under VS 2005 with SP2 (whcih you should install by the way). > Make sure you include the system headers (like windows.h) before the > boost headers. VS 2005 SP2? That's strange I cannot find any info about this service pack: http://msdn2.microsoft.com/en-us/vstudio/Aa718359.aspx Tadas

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Re: [Boost-users] Serialization of hashmap
by Hansi Hansi 09 Aug '07

09 Aug '07

Hello, I don't know If I'm wrong. To install boost I have used the installer from boost-consulting. At the moment I'm using version 1.34.0. I have set the configuration makros in the follwing way #define BOOST_HAS_HASH #define BOOST_STD_EXTENSION_NAMESPACE stdext #define STD BOOST_STD_EXTENSION_NAMESPACE The problem is that during compiling I get 2 errors: Error 133 error C2039: 'resize' : is not a member of 'stdext::hash_map<_Kty,_Ty,_Tr>' C:\boost_1_34_0\boost\serialization\hash_collections_load_imp.hpp 46 Error 134 error C2039: 'bucket_count' : is not a member of 'stdext::hash_map<_Kty,_Ty,_Tr>' C:\boost_1_34_0\boost\serialization\hash_collections_save_imp.hpp 43 The test program doesn't work to compile too. There are problems with the following lines: namespace BOOST_STD_EXTENSION_NAMESPACE { template<> struct hash<random_key>{ <<<<<<<<<------------- line 156 std::size_t operator()(const random_key& r) const { return (std::size_t)r; } }; } // namespace BOOST_STD_EXTENSION_NAMESPACE Error 9 error C2143: syntax error : missing ';' before '<' c:\boost_1_34_0\libs\serialization\test\test_map.cpp 156 Is there some other makro that I have to define? Best Regards and many thanks for your help Hansjörg > -----Ursprüngliche Nachricht----- > Von: boost-users(a)lists.boost.org > Gesendet: 09.08.07 08:54:35 > An: boost-users(a)lists.boost.org > Betreff: Re: [Boost-users] Serialization of hashmap > > There is a test program - test_map which should demonstrate the > functionality. > > It depends upon standard boost macros for stdext: so if the test > doesnt invoke the hash map, you might check to see if the config system > is correct. > > Let me know what you find out. > > Robert Ramey > > Hansi Hansi wrote: > > Hello, > > > > Sorry I have forgotten to write the subject in the last post. > > > > is there a possibility to serialize a hash_map with the vc8.0 > > compiler? this compiler has defined a hash_map under the stdext > > namespace. It seems that the implementation in boost doesn't work at > > the moment for this class. > > > > Or is there another hash_map implementation available which can be > > serialized? > > > > Best regards > > Hansjörg > > > > > > _____________________________________________________________________ > > Der WEB.DE SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! > > http://smartsurfer.web.de/?mc=100071&distributionid=000000000066 > > > > > > <hr> > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > __________________________________________________________________________ Erweitern Sie FreeMail zu einem noch leistungsstärkeren E-Mail-Postfach! Mehr Infos unter http://produkte.web.de/club/?mc=021131

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Memory pool management (v1-34-1)
by cisjar 09 Aug '07

09 Aug '07

I am using memory pool objects and I had a little trouble when ran first time my multi-threaded application under Linux. I looked at sources (detail/mutex.hpp) and in my opinion an automatic recognition the multi-thread mode is done improperly. In my project I used only headers from pool library and I had to explitly defined the BOOST_HAS_THREADS macro. There is not any information about it in documentation. From other boost libraries I know that is not intended to define this macro by users. cisjar

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