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Problem with boost 1.36, vs2005 and serialization library -> linker problem
by Hansi 26 Aug '08

26 Aug '08

Hello, in my application I wrote the serialization like in the pimpl example. With boost 1.34.1 this has worked. But now I have a few strange linker errors. e.g Error 1413 error LNK2001: unresolved external symbol "protected: __thiscall boost::archive::detail::archive_pointer_oserializer<class boost::archive::detail::polymorphic_oarchive_route<class boost::archive::binary_oarchive_impl<class boost::archive::binary_oarchive,char,struct std::char_traits<char> > > >::archive_pointer_oserializer<class boost::archive::detail::polymorphic_oarchive_route<class boost::archive::binary_oarchive_impl<class boost::archive::binary_oarchive,char,struct std::char_traits<char> > > >(class boost::serialization::extended_type_info const &)" (??0?$archive_pointer_oserializer@V?$polymorphic_oarchive_route@V?$binary_oarchive_impl@Vbinary_oarchive@archive@boost@@DU?$char_traits@D@std@@@archive@boost@@@detail@archive@boost@@@detail@archive@boost@@$$FIAE@ABVextended_type_info@serialization@3@@Z) main.obj and Error 1414 error LNK2001: unresolved external symbol "protected: __thiscall boost::archive::detail::archive_pointer_iserializer<class boost::archive::polymorphic_binary_iarchive>::~archive_pointer_iserializer<class boost::archive::polymorphic_binary_iarchive>(void)" (??1?$archive_pointer_iserializer@Vpolymorphic_binary_iarchive@archive@boost@@@detail@archive@boost@@$$FIAE@XZ) main.obj The problem has something to do with BOOST_CLASS_EXPORT(A) function. If I don't include it there is not the problem with the linker error. In the cpp file I have at the moment the instantion template void A::serialize(boost::archive::polymorphic_iarchive & ar,const unsigned int file_version); template void A::serialize(boost::archive::polymorphic_oarchive & ar,const unsigned int file_version); and template void A::serialize(boost::archive::binary_iarchive & ar,const unsigned int file_version); template void A::serialize(boost::archive::binary_oarchive & ar,const unsigned int file_version); What I have to do to solve that? Best regards Hansjörg

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Format local time in W3C format (YYYY-MM-DDThh:mm:ss.sTZD) without providing the time zone myself?
by Paul Bormans 26 Aug '08

26 Aug '08

I'm having trouble in formatting the local time in W3C format. The format is described at http://www.w3.org/TR/NOTE-datetime as follows: YYYY-MM-DDThh:mm:ss.sTZD (eg 1997-07-16T19:20:30.45+01:00) My first attempt was to use a ptime as follows: boost::posix_time::ptime t(boost::posix_time::microsec_clock::local_time()); boost::posix_time::time_facet* output_facet = new boost::posix_time::time_facet(); ss.imbue(std::locale(std::locale::classic(), output_facet)); output_facet->format("%Y-%m-%dT%H:%M:%S%f%Q"); ss << t; But when using a ptime in combination with a time_facet, the time zone (%Q) is ignored (also mentioned in the documentation http://www.boost.org/doc/libs/1_34_1/doc/html/date_time/date_time_io.html) So i thought to switch to the local time library which gives me the following code: typedef boost::date_time::time_facet<boost::local_time::local_date_time, char> ldt_facet; ldt_facet* output_facet = new ldt_facet("%Y-%m-%dT%H:%M:%S%f%Q"); ss.imbue(std::locale(std::locale::classic(), output_facet)); boost::local_time::time_zone_ptr zone; <=========== boost::local_time::local_date_time ldt1(boost::posix_time::microsec_clock::local_time(), zone); ss << ldt1; Problem here is that i have to provide the timezone where the software is running, which (offcourse) i do not know and actually would like the boost library to do this for me ;) After searching the web and reading the unittests i have found some clue's how i could make it work by first getting the difference between localtime and universial time and then format the timezone part myself. This will be much trouble for something that (i believe) should be in the library already. So my question is: How can i format the local time in W3C format (without providing the time zone myself)? Environment info: - Windows XP - VC2005 - Boost 1_34_1 Thanks for any hints & tips, Paul _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/

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[program-options] Problem with paths that have spaces
by Allen Cronce 26 Aug '08

26 Aug '08

Hi all, I'm trying to use program-options to specify a filesystem path object under Boost 1.35.0. The following code works fine when the path specified on the command line has no spaces in it. But when it does have spaces, I get an error. --snip-- #include <iostream> #include <sstream> #include <boost/program_options.hpp> #include <boost/filesystem/path.hpp> namespace po = boost::program_options; namespace fs = boost::filesystem; using namespace std; int main (int argc, char * argv[]) { int result = 0; try { fs::path inPath; po::options_description desc("Allowed options"); desc.add_options() ("in,i", po::value<fs::path>(&inPath), "Input file or directory <pathname>") ; po::variables_map vm; po::store(po::parse_command_line(argc, argv, desc), vm); po::notify(vm); if (0 ==vm.count("in")) { throw invalid_argument("What? No input path specifed!"); } cout << "Input path = \"" << inPath.file_string() << "\"\n"; } catch(const boost::filesystem::filesystem_error& e) { cerr << "\nFilessytem error: " << e.what() << endl; result = 3; } catch(const std::exception& e) { cerr << "\nException error: " << e.what() << endl; result = 2; } catch(...) { cerr << "\nError: Caught an unknown exception!" << endl; result = 1; } return result; } --snip-- If I call the above with the following parameters, it works: --in "my_file" Input path = "my_file" But if I call it with a path that has a space in it, I get an error: --in "my file" Exception error: in option 'in': invalid option value 'my file' I know that I can work around the problem by loading the path into an interim string first, then use the string to initialize a path object. But unless I'm missing something, I would have thought that iteroperability between boost.program-options and boost.filesystem should be more seamless. It seems very common to want to load options into path objects. Best, -- Allen Cronce

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link error trying to open file libboost_date-time-vc71-mt-gd-1_36.lib
by Vincent Buonassisi 26 Aug '08

26 Aug '08

hi, i create the multi-threaded and dll versions of the thread and date_time libraries on windows platform using vc++ 7.1: boost_date_time-vc71-mt-gd-1_36.dll/.lib boost_thread-vc71-mt-gd-1_36.dll/.lib when i link my application it wants the static version of the date_time library. is it possible to change boost so that it uses the dll instead of the static version? thanks, vince

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Re: [Boost-users] [Thread] Beginner question regarding threadgroups
by Mike Marchywka 25 Aug '08

25 Aug '08

Hi, I am afraid that once these papers are published, we no longer have the copyright to it (I know it's weird but that is how academic papers work ...). So they are all on IEEE servers or some other journals. The only thing I could find is a link to some slides for a talk at the NUSOD conference but it is short on details. I have not used cite seer in nearly a decade since the advent of Google Scholar ... We do use geometric optics for this with a few exceptions (i.e. anti-reflection coatings used to increase extraction efficiency use a multi-layer plane wave transfer matrix method to get an effective reflection coefficient). But this is getting a bit off-topic so back on to the code ... The only reason I thought the list would tolerate this was general interest in optimization problems and literature sources. Everyone seems to want to use threads and ignore algorithmic issues that may provide ideas for library code. Certainly not boost specific but could develop into something. Considering a few real examples may be interesting by itself. Sent from my Verizon Wireless BlackBerry

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Re: [Boost-users] [Thread] Beginner question regarding thread groups
by Michel Lestrade 25 Aug '08

25 Aug '08

Hi, I am afraid that once these papers are published, we no longer have the copyright to it (I know it's weird but that is how academic papers work ...). So they are all on IEEE servers or some other journals. The only thing I could find is a link to some slides for a talk at the NUSOD conference but it is short on details. I have not used cite seer in nearly a decade since the advent of Google Scholar ... We do use geometric optics for this with a few exceptions (i.e. anti-reflection coatings used to increase extraction efficiency use a multi-layer plane wave transfer matrix method to get an effective reflection coefficient). But this is getting a bit off-topic so back on to the code ... > Are any of the intro papers on google available as free, full text? That is my reason for going > to citeseer ( as it turns out they even seem to allow text format download ) > AFAIK all of the papers are available for free(IEEE is about the worst in terms of > open access, including for searching with scripts or using computer methods,LOL). > > Are these all homogeneous materials with a few planar discontinuities ? > Offhand it seems you could do a lot analytically with classical geometrical > optics. ================================================================================= Thanks for the code sample. It is not what I envisioned originally but I was not aware that threads were that expensive to create/destroy; this is fancier but makes more sense. I guess this will be my starting point, along with most of the Fortran code that I will be keeping. > > Actually, the while loop lives inside the threads, since creating and > destroying threads is relatively expensive, and you don't need to. > > >> > Did I understand you correctly ? It's a good idea and, from the little I >> > know on the subject, it sounds a lot like a "thread pool". >> > >> > > Yes, it's exactly a thread pool. > > Thanks again, Michel Lestrade Crosslight Software

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Xpressive: UTF-8 and diacritics
by Allan Odgaard 25 Aug '08

25 Aug '08

It looks like the traits aspect of Xpressive is geared toward characters, so I assume that Xpressive is not directly usable with UTF-8 encoded text, am I correct? It might work by having the character type be a 32 bit integer and then use iterator adapters which expose the sequence as ucs-4 code points (after all, the sequence is “encoded”), but that leads me to the next question: diacritics. For example something like é in decomposed unicode is two code points (e followed by a combining ´ mark), so even when the sequence is iterated as ucs-4 code points, a regexp of “.” will match just the e, not the actual (rendered) character. Since I was unable to find any discussion of this while searching for Xpressive, I am curious to hear if any thoughts have gone into these issues.

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[Spirit] C++ Parser library
by Florian Goujeon 25 Aug '08

25 Aug '08

Dear boosters, I post in the mailing list for the first time, so I don't know very much about what could have been said concerning any potential Spirit powered C++ parser. I recently started to develop a C++ parsing library. In the future, I would like to develop an UML tool with round-trip engineering capabilities. Such a library would be the cornerstone of that project. Before I started to develop it, I obviously looked for an similar project in the Internet. I've found this page : http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl?BoostSpiritC… which was out of date… until recently. Since BoostSpiritCXXParser seems to start again, I though it could be a good idea to talk about my work with the contributors of this project. First of all, here is a place where you could find a snapshot of my source code: https://git.berlios.de/cgi-bin/gitweb.cgi?p=cppparser;a=summary (Note that the most recent revisions are located on my computer, thanks to GIT). The Spirit grammar is located in src/cppparser/grammar.h file. I'd be pleased to have some comments about it. Regards. Florian

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Re: [Boost-users] [Thread] Beginner question regarding thread
by Michel Lestrade 25 Aug '08

25 Aug '08

Hi, So if I understand your suggestion, I should create a container holding rays yet to be processed and then run a while loop until this queue/container is empty. Within that loop, I create a smaller number of threads by popping rays from the queue and let the threads run until they finish before going on to the next iteration. Did I understand you correctly ? It's a good idea and, from the little I know on the subject, it sounds a lot like a "thread pool". Guess I misunderstood the concept behind thread_group since I thought it was doing that already ... There's even a hardware_concurrency() function to determine the number of cores/cpus which I thought was intended to control how many threads were to be running at once. Regards, Michel Lestrade Crosslight Software > ------------------------------ > > Message: 7 > Date: Sun, 24 Aug 2008 21:56:49 -0400 > From: "Scott McMurray" <me22.ca+boost(a)gmail.com> > Subject: Re: [Boost-users] [Thread] Beginner question regarding thread > groups > To: boost-users(a)lists.boost.org > Message-ID: > <fa28b9250808241856l384711bfw658deaa79ae77d96(a)mail.gmail.com> > Content-Type: text/plain; charset=UTF-8 > > On Sun, Aug 24, 2008 at 18:58, Michel Lestrade > <michel.lestrade(a)crosslight.com> wrote: > >> > >> > I am considering rewriting part of our ray tracing code to use the Boost >> > thread library. As many of you might know, ray tracing is a task that lends >> > itself well to a parallel approach since each ray is independent from the >> > other. However, the code right now is in Fortran which doesn't support task >> > level parallelism easily ... The thread_group class seems ideally suited to >> > my needs (one thread == one ray) but there is at least one problem I >> > envision that I would like to solve before embarking on this fairly >> > time-consuming rewrite. >> > >> > > It's worth pointing out that, as I recall, you don't really want more > continually-active threads than, say, twice your number of cores. It > would be nice to run one thread per ray, but the switching and OS > management overhead will kill you if you attempt to run thousands of > threads at once, which I assume you'd need with 1:1. (Erlang, for > example, which is conceptually based on many, many communicating > processes, uses its own implementation, rather than OS threads of > processes.) > > I think you'd be much better off creating a "ray queue" of some sort, > then using a thread_group with cores+1 threads that all continually > poll the ray queue for which one to work on. > > So that's not exactly an answer to the question you asked, but I think > that's the usual wisdom with regards to threads. > > HTH, > ~ Scott > > > ------------------------------

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[System] compile error
by Paul Heil 25 Aug '08

25 Aug '08

I'm trying to compile Boost 1.36.0 with Microsoft Visual Studio 9.0 for Windows Mobile 5. Unfortunately, I'm getting a compile error on the system library (below). Can anybody suggest what I may be doing wrong? The command line I'm using to compile boost is: C:\boost\boost_1_36_0>bjam --without-python --without-mpi msvc-WM5/variant=debug,release/threading=multi/*stdlib*=stlport/link=shared,static/runtime-link=static stage The output from the -d2 flag, as it relates to the System library is: file bin.v2\libs\system\build\msvc-WM5\debug\link-static\runtime-link-static\* stdlib*-stlport\threading-multi\error_code.obj.rsp "libs\system\src\error_code.cpp" -Fo"bin.v2\libs\system\build\msvc-WM5\debug\link-static\runtime-link-static\ *stdlib*-stlport\threading-multi\error_code.obj" -TP /Z7 /Od /Ob0 /W3 /GR /MTd /Zc:forScope /Zc:wchar_t /wd4675 /EHs -D_CRT_SECURE_NO_WARNINGS -D_WIN32_WCE=0x501 -DUNDER_CE=0x501 -DWIN32_WCE_PSPC -D_MSC_VER=1500 -DWINCE -DARM -D_ARM_ -DARMV4I -D_LITTLE_ENDIAN -DUNICODE -D_UNICODE -DPOCKETPC2003_UI_MODEL -c -DBOOST_ALL_NO_LIB=1 -DBOOST_SYSTEM_STATIC_LINK=1 -D_STLP_DEBUG=1 -D_STLP_DEBUG_UNINITIALIZED=1 "-I." "-IC:STLPortSTLport-5.1.5stlport" compile-c-c++ bin.v2\libs\system\build\msvc-WM5\debug\link-static\runtime-link-static\* stdlib*-stlport\threading-multi\error_code.obj cl /Zm800 -nologo @"bin.v2\libs\system\build\msvc-WM5\debug\link-static\runtime-link-static\* stdlib*-stlport\threading-multi\error_code.obj.rsp" error_code.cpp Unknown EVC++ compiler version - please run the configure tests and report the results libs\system\src\error_code.cpp(83) : error C2039: '*strerror*' : is not a member of '*stlpd_std*' libs\system\src\error_code.cpp(83) : error C3861: '*strerror*': identifier not found ...failed compile-c-c++ bin.v2\libs\system\build\msvc-WM5\debug\link-static\runtime-link-static\* stdlib*-stlport\threading-multi\error_code.obj... ...skipped <pbin.v2\libs\system\build\msvc-WM5\debug\link-static\runtime-link-static\* stdlib*-stlport\threading-multi>libboost_system-vc-mt-sgdp-1_36.lib for lack of <pbin.v2\libs\system\build\msvc-WM5\debug\link-static\runtime-link-static\* stdlib*-stlport\threading-multi>error_code.obj... ...skipped <pstage\lib>libboost_system-vc-mt-sgdp-1_36.lib for lack of <pbin.v2\libs\system\build\msvc-WM5\debug\link-static\runtime-link-static\* stdlib*-stlport\threading-multi>libboost_system-vc-mt-sgdp-1_36.lib... For reference, my user-config.jam file: using msvc : WM5 : "cl.exe" : <compileflags>-D_CRT_SECURE_NO_WARNINGS <compileflags>-D_WIN32_WCE=0x501 <compileflags>-DUNDER_CE=0x501 <compileflags>-DWIN32_WCE_PSPC <compileflags>-D_MSC_VER=1500 <compileflags>-DWINCE <compileflags>-DARM <compileflags>-D_ARM_ <compileflags>-DARMV4I <compileflags>-D_LITTLE_ENDIAN <compileflags>-DUNICODE <compileflags>-D_UNICODE <compileflags>-DPOCKETPC2003_UI_MODEL <linkflags>/subsystem:windowsce,5.01 <linkflags>/machine:arm <linkflags>/NODEFAULTLIB:oldnames.lib <linkflags>/STACK:262144,4096 <linkflags>coredll.lib <linkflags>corelibc.lib <linkflags>ole32.lib <linkflags>oleaut32.lib <linkflags>uuid.lib <linkflags>commctrl.lib <architecture>arm <instruction-set>armv4 <interface>wince <assembler>"armasm.exe" ; using stlport : : C:\STLPort\STLport-5.1.5\stlport C:\STLPort\STLport-5.1.5\lib ; Thanks, PaulH

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