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Problems compiling on Windows......
by Marcus MacWilliam 24 Jul '13

24 Jul '13

Hello, I am a boost newbie, and this is my first post :-) I am inserting boost into my application using pre-compiled headers on Windows. The pre-compiled header looks like this: #ifndef PRECOMPILEDHEADERS_WINRT_SRC_MAIN_INCLUDE_PRE_COMPILED_H_ #define PRECOMPILEDHEADERS_WINRT_SRC_MAIN_INCLUDE_PRE_COMPILED_H_ // Standard integer types #include <stdint.h> // Includes for d2d libraries #include <wrl.h> #include <d3d11_1.h> #include <d2d1_1.h> #include <d2d1effects.h> #include <d2d1_1helper.h> #include <dwrite_1.h> #include <wincodec.h> #include <math.h> #include <agile.h> // Includes for STL types #include <string> #include <vector> #include <set> #include <map> #include <memory> #include <exception> #include <collection.h> // Includes for Windows error #include <winerror.h> // Includes for Boost libraries #include "boost/exception/all.hpp" #include "boost/optional.hpp" #include "boost/variant.hpp" #include "boost/exception_ptr.hpp" #include "boost/date_time/posix_time/posix_time_types.hpp" #include "boost/archive/text_oarchive.hpp" #include "boost/archive/text_iarchive.hpp" #include "boost/serialization/access.hpp" #include "boost/serialization/vector.hpp" #include "boost/serialization/string.hpp" // Includes for devices communications #include "boost/interprocess/sync/named_mutex.hpp" #include "boost/interprocess/sync/scoped_lock.hpp" #include "boost/archive/binary_oarchive.hpp" #include "boost/archive/binary_iarchive.hpp" #endif // PRECOMPILEDHEADERS_WINRT_SRC_MAIN_INCLUDE_PRE_COMPILED_H_ However when I attempt to compile this through maven, using the maven-nar-plugin, on a Windows 8 machine, I get the following error: [INFO] --- maven-nar-plugin:2.25:nar-compile (default-nar-compile) @ precompiledheaders-winrt --- [INFO] Compiling 1 native files [INFO] Looking for WinRT dependencies [ERROR] C:\Users\marcusma\Source\1edit-prism\precompiledheaders\winrt\external-sources\boost/interprocess/detail/os_file _functions.hpp(94) : error C2039: 'getenv' : is not a member of 'std' [ERROR] C:\Users\marcusma\Source\1edit-prism\precompiledheaders\winrt\external-sources\boost/interprocess/detail/os_file _functions.hpp(94) : error C3861: 'getenv': identifier not found This appears to be correct, getenv according to the MSDN documentation is not available when compiling code for WinRT, using Visual Studio 12, on a Windows 8 machine. I understood that boost was supposed to be multi-platform, so why is std::getenv being used, which is not available for Windows? Can someone suggest what I need to do to get my pre-compiled headers to compile. Cheers, -- Marcus A.T MacWilliam, Senior Software Engineer. 1Spatial Ltd. Tel: +44 (0)1223 420414, ext 2289, Mob: +44 (0)7803 706597. E-Mail: marcus.macwilliam(a)1spatial.com Skype:marcus.macwilliam Tennyson House, 7 Cambridge Business Park, Cambridge, CB4 0WZ. Registered in England No. 4785688, VAT Reg. No. 135539408. Website: http://www.1spatial.com/ E-mail: info(a)1spatial.com

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Boost for Windows
by Haroogan 24 Jul '13

24 Jul '13

Hello fellows, Boost for Windows <https://bitbucket.org/Haroogan/boost-for-windows> has just been updated. It features the latest Boost (1.54.0) binaries for the latest MinGW-w64 (4.8.1). Note that SJLJ variants are not present as they seem to lose popularity these days. Nevertheless, if someone urgently needs SJLJ builds, just let me know. Finally, the guide on building Boost was updated too. Kind regards, Haroogan

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Persistent graphs with boost::graph
by Maurizio Vitale 24 Jul '13

24 Jul '13

Hello boost-users, is anybody aware of a library for building persistent graphs (graphs that allow access to a certain number of previous versions of the graph) on top of boost::graph? I don't really need access to versions after every modification, but rather I consider a new version as obtained by a set of modifications that are committed as a vlock, database style. I'm interested in large graphs, so memory sharing across versions is critical. Changes between versions are minimal (few nodes/edges in graphs with O(1M) nodes each with very few edges) Thanks, Maurizio

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Can't get boost log example to link
by Jarrett Chisholm 24 Jul '13

24 Jul '13

hey all I'm having trouble getting this simple boost log example to link: #include <boost/log/trivial.hpp> int main(int, char*[]) { BOOST_LOG_TRIVIAL(trace) << " a trace message "; } I can compile it ok, but linking causes the below issues: g++ -o build/main.o -c -std=c++11 -Wall -g -O0 src/main.cpp g++ -o build/test build/main.o -lboost_log -lboost_log_setup -lboost_date_time -lboost_thread -lboost_wave -lboost_regex -lboost_program_options -lboost_system -lboost_filesystem -lpthread build/main.o: In function `main': /home/jarrett/projects/chisholmsoft/logtest/src/main.cpp:5: undefined reference to `boost::log::v2s_mt_posix::trivial::logger::get()' /home/jarrett/projects/chisholmsoft/logtest/src/main.cpp:5: undefined reference to `boost::log::v2s_mt_posix::trivial::logger::get()' build/main.o: In function `boost::log::v2s_mt_posix::record::reset()': /usr/local/include/boost/log/core/record.hpp:153: undefined reference to `boost::log::v2s_mt_posix::record_view::public_data::destroy(boost::log::v2s_mt_posix::record_view::public_data const*)' build/main.o: In function `boost::log::v2s_mt_posix::record boost::log::v2s_mt_posix::sources::basic_composite_logger<char, boost::log::v2s_mt_posix::sources::severity_logger_mt<boost::log::v2s_mt_posix::trivial::severity_level>, boost::log::v2s_mt_posix::sources::multi_thread_model<boost::log::v2s_mt_posix::aux::light_rw_mutex>, boost::log::v2s_mt_posix::sources::features<boost::log::v2s_mt_posix::sources::severity<boost::log::v2s_mt_posix::trivial::severity_level> > >::open_record<boost::parameter::aux::tagged_argument<boost::log::v2s_mt_posix::keywords::tag::severity, boost::log::v2s_mt_posix::trivial::severity_level const> >(boost::parameter::aux::tagged_argument<boost::log::v2s_mt_posix::keywords::tag::severity, boost::log::v2s_mt_posix::trivial::severity_level const> const&)': /usr/local/include/boost/log/sources/basic_logger.hpp:457: undefined reference to `boost::log::v2s_mt_posix::core::get_logging_enabled() const' build/main.o: In function `boost::log::v2s_mt_posix::aux::record_pump<boost::log::v2s_mt_posix::sources::severity_logger_mt<boost::log::v2s_mt_posix::trivial::severity_level> >::~record_pump()': /usr/local/include/boost/log/sources/record_ostream.hpp:278: undefined reference to `boost::log::v2s_mt_posix::aux::unhandled_exception_count()' build/main.o: In function `boost::log::v2s_mt_posix::aux::record_pump<boost::log::v2s_mt_posix::sources::severity_logger_mt<boost::log::v2s_mt_posix::trivial::severity_level> >::record_pump(boost::log::v2s_mt_posix::sources::severity_logger_mt<boost::log::v2s_mt_posix::trivial::severity_level>&, boost::log::v2s_mt_posix::record&)': /usr/local/include/boost/log/sources/record_ostream.hpp:259: undefined reference to `boost::log::v2s_mt_posix::aux::stream_provider<char>::allocate_compound(boost::log::v2s_mt_posix::record&)' /usr/local/include/boost/log/sources/record_ostream.hpp:259: undefined reference to `boost::log::v2s_mt_posix::aux::unhandled_exception_count()' build/main.o: In function `boost::log::v2s_mt_posix::aux::record_pump<boost::log::v2s_mt_posix::sources::severity_logger_mt<boost::log::v2s_mt_posix::trivial::severity_level> >::auto_release::~auto_release()': /usr/local/include/boost/log/sources/record_ostream.hpp:243: undefined reference to `boost::log::v2s_mt_posix::aux::stream_provider<char>::release_compound(boost::log::v2s_mt_posix::aux::stream_provider<char>::stream_compound*)' build/main.o: In function `boost::log::v2s_mt_posix::sources::aux::severity_level<boost::log::v2s_mt_posix::trivial::severity_level>::set_value(boost::log::v2s_mt_posix::trivial::severity_level)': /usr/local/include/boost/log/sources/severity_feature.hpp:135: undefined reference to `boost::log::v2s_mt_posix::sources::aux::get_severity_level()' build/main.o: In function `boost::log::v2s_mt_posix::record boost::log::v2s_mt_posix::sources::basic_logger<char, boost::log::v2s_mt_posix::sources::severity_logger_mt<boost::log::v2s_mt_posix::trivial::severity_level>, boost::log::v2s_mt_posix::sources::multi_thread_model<boost::log::v2s_mt_posix::aux::light_rw_mutex> >::open_record_unlocked<boost::parameter::aux::tagged_argument<boost::log::v2s_mt_posix::keywords::tag::severity, boost::log::v2s_mt_posix::trivial::severity_level const> >(boost::parameter::aux::tagged_argument<boost::log::v2s_mt_posix::keywords::tag::severity, boost::log::v2s_mt_posix::trivial::severity_level const> const&)': /usr/local/include/boost/log/sources/basic_logger.hpp:260: undefined reference to `boost::log::v2s_mt_posix::core::open_record(boost::log::v2s_mt_posix::attribute_set const&)' build/main.o: In function `boost::log::v2s_mt_posix::core::push_record(boost::log::v2s_mt_posix::record&&)': /usr/local/include/boost/log/core/core.hpp:308: undefined reference to `boost::log::v2s_mt_posix::core::push_record_move(boost::log::v2s_mt_posix::record&)' collect2: error: ld returned 1 exit status I using the latest boost-trunk code from svn on Debian 7 Stable 64bit. Anyone have any ideas? Cheers Jarrett

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regex icu library (thread safety)
by PingShan Li 24 Jul '13

24 Jul '13

I need to build boost regex library with ICU support. I followed instruction in: http://www.boost.org/doc/libs/1_46_1/libs/regex/doc/html/boost_regex/instal… First I downloaded ICU library and compiled it without any problem. Then I ran the following command: cd /opt/third_party_libraries/boost_1_46_1/libs/regex/build/ (Boost source code is in "/opt/third_party_libraries/boost_1_46_1") [root@pli-dc-build build]# /opt/third_party_libraries/boost_1_46_1/bjam include=/usr/local/ --toolset=gcc install Performing configuration checks - has_icu builds : yes ...patience... ... ... gcc.compile.c++ ../../../bin.v2/libs/regex/build/gcc-3.4.6/debug/usinstances.o gcc.link.dll ../../../bin.v2/libs/regex/build/gcc-3.4.6/debug/libboost_regex.so.1.46.1 common.copy /opt/third_party_libraries/boost_1_46_1/lib/libboost_regex.so.1.46.1 ln-UNIX /opt/third_party_libraries/boost_1_46_1/lib/libboost_regex.so ln-UNIX /opt/third_party_libraries/boost_1_46_1/lib/libboost_regex.so.1 ln-UNIX /opt/third_party_libraries/boost_1_46_1/lib/libboost_regex.so.1.46 ...updated 22 targets... The build process is successful and I can find the library in "/opt/third_party_libraries/boost_1_46_1/lib/libboost_regex.so.1.46.1". The question is: does this library support multiple threads? I did some research on this topic, it seems like even though the name does not contain "mt", it is actually thread safe. Or do I have to pass extra parameter to generate thread safe version? The normal boost build process generates regex library with name like: libboost_regex-gcc34-mt-1_46_1.so.1.46.1 (http://www.boost.org/doc/libs/1_46_1/more/getting_started/unix-variants.html) From the name, I know if the library supports multiple threads. My development box: uname -a Linux 2.6.18-308.1.1.el5PAE #1 SMP Wed Mar 7 04:57:46 EST 2012 i686 i686 i386 GNU/Linux gcc --version gcc (GCC) 3.4.6 20060404 (Red Hat 3.4.6-4.1) Copyright (C) 2006 Free Software Foundation, Inc. Thanks

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Is MultiIndex right for me?
by Sensei 23 Jul '13

23 Jul '13

Hello everyone, I was playing with std::unordered_multimap trying to achieve the following. I need to store values in no particular order. I need to find, however, all values (let's assume they are integers) that satisfy some given criteria that is NOT the simple equality. For example, I'd like to store integers, and find all integers that are equal modulo p, for instance given two integers u, v, I may write the equality predicate as return (u % p) == (v % p). This requirement might change (at compile time, of course), for example, in another map I'd like to find all integers that have a particular bit set to 1. I tried, as I said, with std::unordered_multimap, but I was told (correctly, AFAIK) that the ISO requires that items matching values MUST match also with hash values. Of course, in my case matching integers do not possess matching hashes. I was wondering if boost might be handy here. Thanks & Cheers!

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[multiprecision] Compiler Warnings
by Michael Olea 23 Jul '13

23 Jul '13

Hi. I'm getting compiler warnings for narrowing conversions when I write a cpp_int to a stream. This is with boost 1_53_0 on OS X 10.8.3 using Xcode version 4.6.2 with clang: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang --version Apple LLVM version 4.2 (clang-425.0.28) (based on LLVM 3.2svn) Target: x86_64-apple-darwin12.3.0 Thread model: posix Here's a short example causing the problem: // // main.cpp // #include <boost/multiprecision/cpp_int.hpp> #include <iostream> int main(int argc, const char * argv[]) { using namespace boost::multiprecision; cpp_int u = 1; for(unsigned i = 1; i <= 100; ++i) u *= i; std::cout << "100! using arbitrary precision cpp_int:\n"; std::cout << u << std::endl; // prints 100! return 0; } The short compiler messages: In file included from /Users/olea/code/mjaal/learn/boost/build/xcode/mp_warner/mp_warner/main.cpp:5: /usr/local/include/boost/multiprecision/cpp_int.hpp:1573:34: warning: implicit conversion loses integer precision: 'unsigned long' to 'int' [-Wshorten-64-to-32] int pos = result.size() - 1; ~~~ ~~~~~~~~~~~~~~^~~ /usr/local/include/boost/multiprecision/cpp_int.hpp:1653:14: note: in instantiation of member function 'boost::multiprecision::backends::cpp_int_backend<0, 0, 1, 0, std::__1::allocator<unsigned int> >::do_get_string' requested here return do_get_string(f, trivial_tag()); ^ /usr/local/include/boost/multiprecision/number.hpp:576:24: note: in instantiation of member function 'boost::multiprecision::backends::cpp_int_backend<0, 0, 1, 0, std::__1::allocator<unsigned int> >::str' requested here return m_backend.str(digits, f); ^ /usr/local/include/boost/multiprecision/number.hpp:1650:22: note: in instantiation of member function 'boost::multiprecision::number<boost::multiprecision::backends::cpp_int_backend<0, 0, 1, 0, std::__1::allocator<unsigned int> >, 1>::str' requested here std::string s = r.str(d, os.flags()); ^ /Users/olea/code/mjaal/learn/boost/build/xcode/mp_warner/mp_warner/main.cpp:16:12: note: in instantiation of function template specialization 'boost::multiprecision::operator<<<boost::multiprecision::backends::cpp_int_backend<0, 0, 1, 0, std::__1::allocator<unsigned int> >, 1>' requested here std::cout << u << std::endl; // prints 100! ^ In file included from /Users/olea/code/mjaal/learn/boost/build/xcode/mp_warner/mp_warner/main.cpp:5: /usr/local/include/boost/multiprecision/cpp_int.hpp:1606:34: warning: implicit conversion loses integer precision: 'unsigned long' to 'int' [-Wshorten-64-to-32] int pos = result.size() - 1; ~~~ ~~~~~~~~~~~~~~^~~ /usr/local/include/boost/multiprecision/cpp_int.hpp:1639:23: warning: implicit conversion loses integer precision: 'size_type' (aka 'unsigned long') to 'unsigned int' [-Wshorten-64-to-32] unsigned n = result.find_first_not_of('0'); ~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 3 warnings generated. The compile command: CompileC /Users/olea/Library/Developer/Xcode/DerivedData/mp_warner-fvjhjlwtkmsewtfsdqsuzhczhlxd/Build/Intermediates/mp_warner.build/Debug/mp_warner.build/Objects-normal/x86_64/main.o mp_warner/main.cpp normal x86_64 c++ com.apple.compilers.llvm.clang.1_0.compiler cd /Users/olea/code/mjaal/learn/boost/build/xcode/mp_warner setenv LANG en_US.US-ASCII /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -x c++ -arch x86_64 -fmessage-length=0 -std=gnu++11 -stdlib=libc++ -Wno-trigraphs -fpascal-strings -O0 -Wno-missing-field-initializers -Wno-missing-prototypes -Wreturn-type -Wno-non-virtual-dtor -Wno-overloaded-virtual -Wno-exit-time-destructors -Wformat -Wno-missing-braces -Wparentheses -Wswitch -Wno-unused-function -Wno-unused-label -Wno-unused-parameter -Wunused-variable -Wunused-value -Wempty-body -Wuninitialized -Wno-unknown-pragmas -Wno-shadow -Wno-four-char-constants -Wno-conversion -Wconstant-conversion -Wint-conversion -Wenum-conversion -Wshorten-64-to-32 -Wno-newline-eof -Wno-c++11-extensions -DDEBUG=1 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk -fasm-blocks -fstrict-aliasing -Wdeprecated-declarations -Winvalid-offsetof -mmacosx-version-min=10.8 -g -fvisibility-inlines-hidden -Wno-sign-conversion -iquote /Users/olea/Library/Developer/Xcode/DerivedData/mp_warner-fvjhjlwtkmsewtfsdqsuzhczhlxd/Build/Intermediates/mp_warner.build/Debug/mp_warner.build/mp_warner-generated-files.hmap -I/Users/olea/Library/Developer/Xcode/DerivedData/mp_warner-fvjhjlwtkmsewtfsdqsuzhczhlxd/Build/Intermediates/mp_warner.build/Debug/mp_warner.build/mp_warner-own-target-headers.hmap -I/Users/olea/Library/Developer/Xcode/DerivedData/mp_warner-fvjhjlwtkmsewtfsdqsuzhczhlxd/Build/Intermediates/mp_warner.build/Debug/mp_warner.build/mp_warner-all-target-headers.hmap -iquote /Users/olea/Library/Developer/Xcode/DerivedData/mp_warner-fvjhjlwtkmsewtfsdqsuzhczhlxd/Build/Intermediates/mp_warner.build/Debug/mp_warner.build/mp_warner-project-headers.hmap -I/Users/olea/Library/Developer/Xcode/DerivedData/mp_warner-fvjhjlwtkmsewtfsdqsuzhczhlxd/Build/Products/Debug/include -I/usr/local/include -I/Users/olea/Library/Developer/Xcode/DerivedData/mp_warner-fvjhjlwtkmsewtfsdqsuzhczhlxd/Build/Intermediates/mp_warner.build/Debug/mp_warner.build/DerivedSources/x86_64 -I/Users/olea/Library/Developer/Xcode/DerivedData/mp_warner-fvjhjlwtkmsewtfsdqsuzhczhlxd/Build/Intermediates/mp_warner.build/Debug/mp_warner.build/DerivedSources -F/Users/olea/Library/Developer/Xcode/DerivedData/mp_warner-fvjhjlwtkmsewtfsdqsuzhczhlxd/Build/Products/Debug -MMD -MT dependencies -MF /Users/olea/Library/Developer/Xcode/DerivedData/mp_warner-fvjhjlwtkmsewtfsdqsuzhczhlxd/Build/Intermediates/mp_warner.build/Debug/mp_warner.build/Objects-normal/x86_64/main.d --serialize-diagnostics /Users/olea/Library/Developer/Xcode/DerivedData/mp_warner-fvjhjlwtkmsewtfsdqsuzhczhlxd/Build/Intermediates/mp_warner.build/Debug/mp_warner.build/Objects-normal/x86_64/main.dia -c /Users/olea/code/mjaal/learn/boost/build/xcode/mp_warner/mp_warner/main.cpp -o /Users/olea/Library/Developer/Xcode/DerivedData/mp_warner-fvjhjlwtkmsewtfsdqsuzhczhlxd/Build/Intermediates/mp_warner.build/Debug/mp_warner.build/Objects-normal/x86_64/main.o

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Re: [Boost-users] [graph] in-depth parsing and modifications of the graph
by Orianne Siret 23 Jul '13

23 Jul '13

Thanks a lot, it worked ! Le 12/07/2013 20:54, boost-users-request(a)lists.boost.org a écrit : > Send Boost-users mailing list submissions to > boost-users(a)lists.boost.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.boost.org/mailman/listinfo.cgi/boost-users > or, via email, send a message with subject or body 'help' to > boost-users-request(a)lists.boost.org > > You can reach the person managing the list at > boost-users-owner(a)lists.boost.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Boost-users digest..." > > > Today's Topics: > > 1. [msm] access to root fsm (Alexander Mingalev) > 2. Re: issues compiling Boost 1.54 thread on AIX5.2 > (Vicente J. Botet Escriba) > 3. [boost format] Not getting expected errors (Rob Conde) > 4. Re: [graph] in-depth parsing and modifications of the graph > (Jeremiah Willcock) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 12 Jul 2013 20:29:36 +0400 > From: Alexander Mingalev <infest21h(a)gmail.com> > To: boost-users(a)lists.boost.org > Subject: [Boost-users] [msm] access to root fsm > Message-ID: <51E02EF0.4010202(a)gmail.com> > Content-Type: text/plain; charset="iso-8859-1"; Format="flowed" > > I have main fsm with two sub-levels. > The problem is, the sub-fsms need data which is held in root fsm, like: > > struct SomeAction > { > template <typename EVT, typename FSM, typename > SourceState, typename TargetState> > void operator()(EVT&, FSM& fsm, SourceState&, > TargetState&) const > { > // ... > } > }; > > Instance of fsm here might be root fsm as well as sub-fsm. > I see two possible solutions: > > 1. use sm_ptr policy and store parent pointer in each sub-fsm > In this case access might look like this: > > fsm.parent_->data; (access from 1-level fsm) > fsm.parent_->parent_->data; (access from 2-level fsm) > > doesn't look so nice, besides, documentation states that using sm_ptr is > deprecated. > > 2. recursively traverse all states, detect fsm's and store root pointer > > typedef RootFSM::stt stt; > typedef boost::msm::back::generate_state_set<stt>::type all_states; > > boost::mpl::for_each<all_states, boost::msm::wrap<mpl::placeholders::_1> > > (find_sub_fsm<stt>()); > > template <typename stt> > struct find_sub_fsm > { > template <class StateType> > void operator()(boost::msm::wrap<StateType>& state) const > { > // ??? > // state.root_ = &g_root; > // do the recurs > } > }; > > How to detect that StateType is sub-fsm? > > 3. Maybe, there is a easier way to communicate between sub-fsm's? > >

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Announcing boost dependency analyzer
by Jens Weller 23 Jul '13

23 Jul '13

Hello to the boost community, I'd like to announce the release of a small tool, that allows you analyze the dependencies in boost. It is based on bcp, requirement is that you have bcp build and well a version of boost to analyze installed. Simply select the boost directory (the tool also might find BOOST_ROOT) and the location of bcp, and the tool will start. This will take a little time, depending on your machine, on my multicore intel ist 90 seconds - 2 minute. The tool will store this information into a database, so that with the next start, this will be a lot shorter. The tool allows to analyze the dependcies of a single boost library, but also of all of boost. Its build with Qt for the UI and processing part, and uses boost graph for the layout. Full information + download you'll find at my blogpost: http://www.meetingcpp.com/index.php/br/items/boost-dependency-analyzer.html Current Issues: What libraries might be missing? I'm reading the libs from maintainers.txt, which isn't all the boost libs. For example, lexical_cast is missing, and function_types is twice in there. (C&P error or missing library?) So far Windows is supported, linux support planned and improving, currently ownly the (beta) binaries for linux available. kind regards, Jens Weller

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[icl] joining two simple intervals
by Olaf Krzikalla 23 Jul '13

23 Jul '13

Hi, I just tried and failed to find a simple way to compute the upper and lower bounds of some interval_sets: typedef boost::icl::interval_set<int> list_type; typedef list_type::value_type interval; void add_region(interval& av, const list_type& reg) { av += reg; // didn't work if (!reg.empty()) { // didn't work either: av += tAddressInterval( reg.begin()->lower(), (--reg.end())->upper())); // this one works: av = tAddressInterval(std::min(av.lower(), reg.begin()->lower()), std::max(av.lower(), (--reg.end())->upper())); } } My workaround doesn't even respect the boundary types. I wonder if there is not a simpler way for such a fundamental tasks. Best regards Olaf

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[msm] access to root fsm
by Alexander Mingalev 23 Jul '13

23 Jul '13

I have main fsm with two sub-levels. The problem is, the sub-fsms need data which is held in root fsm, like: struct SomeAction { template <typename EVT, typename FSM, typename SourceState, typename TargetState> void operator()(EVT&, FSM& fsm, SourceState&, TargetState&) const { // ... } }; Instance of fsm here might be root fsm as well as sub-fsm. I see two possible solutions: 1. use sm_ptr policy and store parent pointer in each sub-fsm In this case access might look like this: fsm.parent_->data; (access from 1-level fsm) fsm.parent_->parent_->data; (access from 2-level fsm) doesn't look so nice, besides, documentation states that using sm_ptr is deprecated. 2. recursively traverse all states, detect fsm's and store root pointer typedef RootFSM::stt stt; typedef boost::msm::back::generate_state_set<stt>::type all_states; boost::mpl::for_each<all_states, boost::msm::wrap<mpl::placeholders::_1> > (find_sub_fsm<stt>()); template <typename stt> struct find_sub_fsm { template <class StateType> void operator()(boost::msm::wrap<StateType>& state) const { // ??? // state.root_ = &g_root; // do the recurs } }; How to detect that StateType is sub-fsm? 3. Maybe, there is a easier way to communicate between sub-fsm's?

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packaged_task returning boost::any with BOOST_THREAD_VERSION>=3
by Nicolas P 22 Jul '13

22 Jul '13

Hello, I'm trying to enable boost (1.54) thread version >=3 with my code and i run into a package_task compilation issue I reduced my issue to a minimal test program that compiles fine on windows 7, but fails to compile on osx and linux (compilers info bellow) with BOOST_THREAD_VERSION = 3 or 4 (fine with boost thread version 2) test succeded on - Windows 7 with Visual 2010 Express sp1 with SDK 7.1 ok test failed on - Mac os x 10.6 Xcode 4.2 : gcc 4.2.1 and clang 3.0 - Mac os x 10.7 Xcode 4.4 : gcc and clang 4.0 - Ubuntu 13.04 gcc 4.7.4 The minimal test program : #define BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK #define BOOST_THREAD_VERSION 4 #include <boost/any.hpp> #include <boost/thread.hpp> #include <boost/function.hpp> boost::any process() { return 1; } int main() { boost::function< boost::any () > f = &process ; //boost::packaged_task< boost::any () > task(&process); // Works fine boost::packaged_task< boost::any () > task(f); return 0; } // Replacing 'boost::any' with 'int' make it compile. Error log with clang on os x 10.6 : In file included from /tmp/packaged_task_test/main.cpp:5: In file included from boost/thread.hpp:24: boost/thread/future.hpp:2298:27: error: no matching member function for call to 'set_value_at_thread_exit' this->set_value_at_thread_exit(f()); ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ boost/thread/future.hpp:2857:33: note: in instantiation of member function 'boost::detail::task_object<boost::function<boost::any ()>, boost::any ()>::do_apply' requested here task = task_ptr(new task_object_type(f)); ^ /tmp/packaged_task_test/main.cpp:17:43: note: in instantiation of function template specialization 'boost::packaged_task<boost::any ()>::packaged_task<boost::function<boost::any ()> >' requested here boost::packaged_task< boost::any () > task(f); ^ boost/thread/future.hpp:673:18: note: candidate function not viable: no known conversion from 'result_type' (aka 'boost::any') to 'source_reference_type' (aka 'boost::any &') for 1st argument void set_value_at_thread_exit(source_reference_type result_) ^ boost/thread/future.hpp:687:18: note: candidate function not viable: no known conversion from 'result_type' (aka 'boost::any') to 'rvalue_source_type' (aka 'rv<boost::any> &') for 1st argument void set_value_at_thread_exit(rvalue_source_type result_) ^ boost/thread/future.hpp:2329:25: error: no matching member function for call to 'mark_finished_with_result' this->mark_finished_with_result(f()); ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~ boost/thread/future.hpp:2857:33: note: in instantiation of member function 'boost::detail::task_object<boost::function<boost::any ()>, boost::any ()>::do_run' requested here task = task_ptr(new task_object_type(f)); ^ /tmp/packaged_task_test/main.cpp:17:43: note: in instantiation of function template specialization 'boost::packaged_task<boost::any ()>::packaged_task<boost::function<boost::any ()> >' requested here boost::packaged_task< boost::any () > task(f); ^ boost/thread/future.hpp:627:18: note: candidate function not viable: no known conversion from 'result_type' (aka 'boost::any') to 'source_reference_type' (aka 'boost::any &') for 1st argument void mark_finished_with_result(source_reference_type result_) ^ boost/thread/future.hpp:633:18: note: candidate function not viable: no known conversion from 'result_type' (aka 'boost::any') to 'rvalue_source_type' (aka 'rv<boost::any> &') for 1st argument void mark_finished_with_result(rvalue_source_type result_) ^ 2 errors generated. Am i missing something ? Regards, Nicolas

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[property_tree] Parsing vectors of objects
by Michael Powell 21 Jul '13

21 Jul '13

Hello, I want to parse to and from Xml (or possibly Json) using the property tree. I've got a simple POCO parsing, but now I need to include vectors of objects. Furthermore, I understand the property tree paths are pretty cumbersome. Not so much through a thin vernier, template function, something like that, but anywho... Here's the desired output I want in Xml, something like this: <output> <apples> <apple grower="red" /> <apple grower="green" /> <apple grower="golden" /> </apples> <oranges> <orange freshness="picked" /> <orange freshness="market" /> <orange freshness="store" /> </oranges> <items> <item name="" id="">1234</item> <item name="" id="">1234</item> <item name="" id="">1234</item> </items> </output> I understand the tree path might look something like this "output.apples.apple.<xmlattr>.grower", but what about the vector? Probably want to be trimming white spaces, indenting, as well. Regards, Michael Powell

2 2

Boost integration in Visual Studio 2010
by Georg.Kellerer＠lfu.bayern.de 20 Jul '13

20 Jul '13

Hi, we're using boost inour projects and all works fine. Our projects are standing under version control in a subversion repository. Our problem is that every developper had installed boost in a diferent place. Is their a way to get the reference to boost in a user speciffic configuration place? At the moment we have a fix path c:\dev\boost... but that does not fit for every developpers machine. Thanks for help, Georg ---------------------------------------------- Bayerisches Landesamt für Umwelt Referat Z6: IuK-Steuerung, Aufbau von Informationssystemen Hans-Högn-Str. 12 95030 Hof/Saale Tel.: 09281/1800-4572

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[boost-users][Container] Compilation error using new "static_vector".
by Jupp Tscheak 20 Jul '13

20 Jul '13

Hello boost users, Please consider the following example: [code] #include "CGAL/Cartesian.h" #include "CGAL/Polygon_2.h" #include "boost/container/static_vector.hpp" typedef CGAL::Cartesian<double> Kernel; typedef Kernel::Point_2 Point2d; typedef CGAL::Polygon_2<Kernel, boost::container::static_vector<Point2d, 100> > Polygon2d; Polygon2d p; p = Polygon2d(); [/code] Compiling this code snippet with GCC results in following error message: [error] error: no match for 'operator=' in 'p = CGAL::Polygon_2<CGAL::Cartesian<double>, boost::container::static_vector<CGAL::Point_2<CGAL::Cartesian<double> >, 100u> >((*(const Traits*)(& CGAL::Polygon_2<CGAL::Cartesian<double>, boost::container::static_vector<CGAL::Point_2<CGAL::Cartesian<double> >, 100u> >::Traits())))' note: candidate is: CGAL-4.2/include/CGAL/Polygon_2.h:68:7: note: CGAL::Polygon_2<CGAL::Cartesian<double>, boost::container::static_vector<CGAL::Point_2<CGAL::Cartesian<double> >, 100u> >& CGAL::Polygon_2<CGAL::Cartesian<double>, boost::container::static_vector<CGAL::Point_2<CGAL::Cartesian<double> >, 100u> >::operator=(CGAL::Polygon_2<CGAL::Cartesian<double>, boost::container::static_vector<CGAL::Point_2<CGAL::Cartesian<double> >, 100u> >&) CGAL-4.2/include/CGAL/Polygon_2.h:68:7: note: no known conversion for argument 1 from 'sensor::Polygon2d {aka CGAL::Polygon_2<CGAL::Cartesian<double>, boost::container::static_vector<CGAL::Point_2<CGAL::Cartesian<double> >, 100u> >}' to 'CGAL::Polygon_2<CGAL::Cartesian<double>, boost::container::static_vector<CGAL::Point_2<CGAL::Cartesian<double> >, 100u> >&' [/error] I apologize for this concrete example using CGAL, but maybe someone has advice for me? Thanks in advance! Jupp Tscheak

2 2

Boost::thread instantiation and clean up
by Riskybiz 19 Jul '13

19 Jul '13

I have a C++ DLL written in Visual Studio for use on Windows 7 using Boost 1_53_0. The following two functions, CREATE & DESTROY, are called to launch and shutdown a simple ZeroMQ server (code below). The thread is launched and the server on that thread goes into a continuous listening loop (as intended). When it comes time to shut down the server then the thread is interrupted to cause thread termination (though I cannot tell if the interrupt is actually working as I get no output from the catch block). The boost::thread object is then deleted. Problem is that the 3rd party application which this DLL is designed for is prone to crashing after DESTROY is called and I think it's because either the boost::thread resources are not being freed/cleared up properly or the boost::thread is not interrupting. Have I properly handled thread instantiation, interruption and object destruction here? With thanks, Riskybiz. static bool createCalled = false;//initialise static variable static bool destroyCalled = false;//initialise static variable static boost::thread *serverThread = nullptr; int __stdcall CREATE() { if(createCalled == false) { createCalled = true; OutputDebugStringA("TestDataAccess: CREATE"); serverThread = new boost::thread(ListenOnReplySocket);//create instance of boost::thread object return 0; } return 1; } int __stdcall DESTROY() { if(createCalled == true && destroyCalled == false) { destroyCalled = true; OutputDebugStringA("TestDataAccess: DESTROY"); serverThread->interrupt();//set flag for interruption delete serverThread; return 0; } return 1; } Simple ZeroMQ server: #ifndef ZMQ_COMMUNICATIONS_H//if not defined already #define ZMQ_COMMUNICATIONS_H//then define it #define _WINSOCK2API_ //stops windows.h including winsock2.h #include <zmq.hpp> #include "boost\thread.hpp" int ListenOnReplySocket() { // Prepare our context and socket zmq::context_t context (1); zmq::socket_t socket (context, ZMQ_REP); socket.bind ("tcp://*:5555"); boost::this_thread::interruption_enabled(); try { while (true) { zmq::message_t request; // Wait for next request from client socket.recv (&request); char buffer[50]; int j; j = sprintf_s(buffer, 50, "TestDataAccess: ZMQComms: Hello"); OutputDebugStringA(buffer); // Do some 'work' Sleep (1000); // Send reply back to client zmq::message_t reply (5); memcpy ((void *) reply.data (), "World", 5); socket.send (reply); boost::this_thread::interruption_point();//check iterruption flag } } catch(boost::thread_interrupted) { char buffer[100]; int j; j = sprintf_s(buffer, 100, "TestDataAccess: ZMQComms: Server Thread Interrupted"); OutputDebugStringA(buffer); return 0; } } #endif

3 2

[fusion] how to get the tuple of min values of 2 tuples whatever their length?
by Frédéric Bron 18 Jul '13

18 Jul '13

I have two tuples: typedef boost::tuple<double, int, std::string> Key; Key k1, k2; I would like to get the tuple of the min values for each corresponding value between k1 and k2: Key min=Key(std::min(k1.get<0>(), k2.get<0>()), std::min(k1.get<1>(), k2.get<1>()), std::min(k1.get<2>(), k2.get<2>())); but I do not know the length of the tuple so I am looking for a generic algorithm... Is this possible with boost::fusion or boost::mpl? I have tried with boost::fusion::accumulate but I need to now in the functor the index of the value that is currently accessed to compare to the right one in k1. Frédéric

5 7

Named condition not behaving as expected
by rudasi 18 Jul '13

18 Jul '13

I have 2 processes (producer and consumer) sharing an int deque in shared memory, I have the producer process put 2 numbers in the deque and then it gets in a wait state losing its mutex lock. I then have the consumer process removing the numbers and printing them. It then does a notify on the condition which the producer is waiting on. The consumer then goes on its own wait on a second condition. After this case the producer does not wake up. I am using the same mutex between the processes. I have removed some of the code where i set up the shared memory and create the mutex and conditions. Producer process: int main() { scoped_lock<named_mutex> lock(mutex); while(1) { while (MyDeque->size() == 2) { full.wait(lock); std::cout << "unlocked producer" << std::endl; } if (MyDeque->size() == 0) { *a = 2; MyDeque->push_back(a); } if (MyDeque->size() == 1) { *b = 4; MyDeque->push_back(b); empty.notify_one(); } } } Consumer process: int main() { scoped_lock<named_mutex> lock(mutex); while(1) { //volatile int size = MyDeque->size(); while (MyDeque->size() == 0) { empty.wait(lock); } if (MyDeque->size() == 2) { std::cout << "Consumer: " << *MyDeque->front() << std::endl; MyDeque->pop_front(); } if (MyDeque->size() == 1) { std::cout << "Consumer: " << *MyDeque->front() << std::endl; MyDeque->pop_front(); full.notify_one(); } } } While debugging things seem to go ok for the first iteration, the producer puts numbers 2 and 4 on the deque then waits on the full condition. The Consumer then gets the lock, prints these numbers, does a notify_one on the full condition and then goes into a wait. After this the producer does not wake up. -- View this message in context: http://boost.2283326.n4.nabble.com/Named-condition-not-behaving-as-expected… Sent from the Boost - Users mailing list archive at Nabble.com.

1 0

[serialization] platform independence (32 & 64bit windows)
by आशीष वर्मन् 18 Jul '13

18 Jul '13

Hi We are using boost serialization our product which was 32bit only till now. Now we have started building it on 64bit as well. On finding that boost::binary_archive is not platform independent, we seem to have 2 options: 1. Use text_archive - (but are worried about performance since the serialized data is approx 500MB even after gzip compression) 2. Use the eos portable archive - (but it is updated only till boost 1.49. We are using 1.53) So my questions are: 1. One (and only one) of our archives created by our 32 bit executable is successfully read in by the 64 bit executable while the rest throw exception on reading the archive signature. If the platform is encoded in the signature, why is that one archive being read in successfully. 2. Which of the above two approaches would be better and why. Thanks in advance. Yours Sincerely Ashish Varman

3 3

Boost::Interprocess mutex with condition variable
by Riskybiz 17 Jul '13

17 Jul '13

I'm trying to get a working implementation of a boost::interprocess named_mutex with a named_condition_variable. I have created the following toy console applications to try and understand what's necessary. The console application 'Sleeper' is run first; it simply creates some resources and then goes to sleep. Then 'Waker' is run with the intention that it would cause the 'Sleeper' instance to resume execution and print out a further message. Ultimately the intention is to have one Waker process and several Sleeper processes. When each application is run in a separate terminal window then the Sleeper process sleeps and the Waker process tries to wake; but it is ineffective. Can anyone advise what is wrong here and how to get the notify_all() to take effect? Thanks Riskybiz. // Sleeper.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include <boost/interprocess/managed_shared_memory.hpp> #include <boost/interprocess/sync/named_mutex.hpp> #include <boost/interprocess/sync/named_condition.hpp> #include <iostream> int _tmain(int argc, _TCHAR* argv[]) { using namespace boost::interprocess; //Clean up resources from any prior instances named_condition::remove("msm_named_condition"); named_mutex::remove("msm_named_mutex"); //shared_memory_object::remove("msm"); //Setup shared memory resources managed_shared_memory *msm = new managed_shared_memory(create_only, "msm", 10000); named_mutex *nm = new named_mutex(create_only, "msm_named_mutex"); named_condition *nc = new named_condition(create_only, "msm_named_condition"); try { scoped_lock<named_mutex> lock(*nm);//acquire scoped lock for mutex std::cout << "Going to sleep now...." << std::endl; nc->wait(lock);//induce wait std::cout << "Wide awake and back in the room" << std::endl;//print this out on waking up } catch(interprocess_exception &ipe) { std::cout << "Error in Sleeper process: interprocess_exception: "<< ipe.what() << std::endl; } //Clean up delete msm; delete nm; delete nc; return 0; } // Waker.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include <boost/interprocess/managed_shared_memory.hpp> #include <boost/interprocess/sync/named_mutex.hpp> #include <boost/interprocess/sync/named_condition.hpp> #include <iostream> int _tmain(int argc, _TCHAR* argv[]) { using namespace boost::interprocess; //Setup shared memory resources managed_shared_memory *msm = new managed_shared_memory(open_only, "msm"); named_mutex *nm = new named_mutex(open_only, "msm_named_mutex"); named_condition *nc = new named_condition(open_only, "msm_named_condition"); try { scoped_lock<named_mutex> lock(*nm);//acquire scoped lock for mutex std::cout << "Going to Notify...." << std::endl; nc->notify_all();//notify to release the wait condition std::cout << "Wakey Wakey....Notified...." << std::endl; } catch(interprocess_exception &ipe) { std::cout << "Error in Waker process: interprocess_exception: "<< ipe.what() << std::endl; } //Clean up delete msm; delete nm; delete nc; return 0; }

2 1

multi_index_container with protected constructor
by Horváth Imre 17 Jul '13

17 Jul '13

Hi, I want to use boost::multi_index_container with a class that have protected constructors, but the compile fails. I think I should make multi_index_container a friend of my class, but I don't know how. #include <iostream> #include <boost/shared_ptr.hpp> #include <boost/multi_index_container.hpp> #include <boost/multi_index/ordered_index.hpp> #include <boost/multi_index/composite_key.hpp> #include <boost/multi_index/mem_fun.hpp> class Item { public: typedef boost::shared_ptr<Item> P; static P create() { return P(new Item()); } static P create(P item) { return P(new Item(item)); } protected: Item() { } Item(P item) : source(item->get_source()) , target(item->get_target()) { } public: std::string source; std::string target; std::string get_source() const {return source;} std::string get_target() const {return target;} struct key : boost::multi_index::composite_key< P, boost::multi_index::const_mem_fun<Item, std::string, &Item::get_source>, boost::multi_index::const_mem_fun<Item, std::string, &Item::get_target> >{}; typedef boost::multi_index_container< P, boost::multi_index::indexed_by< boost::multi_index::ordered_non_unique< key, boost::multi_index::composite_key_result_less<key::result_type> > > > index_t; }; int main() { Item::index_t index; Item::P t1 = Item::create(); index.insert(t1); return 0; } Thanks in advance: Imre Horvath

2 2

[Boost.Log] Example tutorial_fmt_stream.cpp does not compile
by Mario Knezović 17 Jul '13

17 Jul '13

I am trying to change date formatting exactly in the way as described in the tutorial, sub-section "Specialized formatters": http://www.boost.org/doc/libs/1_54_0/libs/log/doc/html/log/tutorial/formatt… What I want to achieve is pretty simple, change month output from the default "Abbreviated month name" (%b): [2013-Jul-08 10:51:00.989235] to "Month name as a decimal 01 to 12" (%m): [2013-07-08 10:51:00.989235] Unfortunately this does not compile, nor does the example from which the snipped is taken: "tutorial_fmt_stream.cpp". The interesting part in the example source is commented out by default. (But this was the case with other examples too.) The part I'm interested in is in line 60 (from current Boost 1.54.0): expr::format_date_time< boost::posix_time::ptime >("TimeStamp", "%Y-%m-%d %H:%M:%S") The errors I get (Win7, 64-bit, MS VC++ 2010): error C2027: use of undefined type "boost::log::v2s_mt_nt5::expressions::aux::date_time_formatter_generator_traits<T,CharT>" d:\boost\boost_1_54_0\boost\log\expressions\formatters\date_time.hpp 94 error C3861: "parse": Identifier not found. d:\boost\boost_1_54_0\boost\log\expressions\formatters\date_time.hpp 94 I hope somebody can help or point me in the right direction. Thank you! Mario Knezović

1 1

[log, spirit] phoenix version conflict
by Yi Ding 17 Jul '13

17 Jul '13

It looks like Boost.Log conflicts with Boost.Spirit because they're using different version of Boost Phoenix? Take this example file: #include <boost/log/common.hpp> #include <boost/log/sinks.hpp> #include <boost/spirit/include/karma.hpp> int main() { } We get this warning: In file included from /opt/boost_1_54_0/include/boost/log/detail/custom_terminal_spec.hpp:21, /opt/boost_1_54_0/include/boost/spirit/include/phoenix_core.hpp:13:1: warning: "BOOST_PHOENIX_DEFINE_CUSTOM_TERMINAL" redefined /opt/boost_1_54_0/include/boost/phoenix/core/terminal.hpp:22:1: warning: this is the location of the previous definition There are a bunch of errors that result as well.

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How to build libboost_filesystem-vc110-mt-sgd-1_54.lib with VS2012 x64?
by Amann, Julian 17 Jul '13

17 Jul '13

I have some trouble building the boost filesystem lib using VS2012 x64. I use the following instructions to build it: 1. Download boost 1.54.0 from http://www.boost.org/ 2. Extract files (e.g. "C:\thirdparty\vs2013\x64\boost_1_54_0") 3. Start Visual Studio 2012 x64 command prompt 4. Change to boost directory (e.g. "cd C:\thirdparty\vs2010\x64\boost_1_54_0") 5. Execute .\bootstrap.bat 6. Execute b2 address-model=64 toolset=msvc-11.0 --build-type=complete stage --with-filesystem --with-signals --with-system Unfortunately the file "libboost_filesystem-vc110-mt-sgd-1_54.lib" is not build Previously I used boost 1.51.0, 1.52.0 and 1.53.0. In this releases the libboost_filesystem-vc110-mt-sgd-1_5x.lib was always build without any problems. Did anybody mange to build this lib using VS2012? Which instructions do you use to build it? Best regards, Julian

1 0

[log] operator<< best practices
by Yi Ding 16 Jul '13

16 Jul '13

I noticed boost log has a helper function for operator<< template< typename CharT, typename TraitsT, typename AllocatorT, typename T > inline basic_formatting_ostream< CharT, TraitsT, AllocatorT >& operator<< (basic_formatting_ostream< CharT, TraitsT, AllocatorT >& strm, T const& value) { strm.stream() << value; return strm; } which is useful because a lot of code has operator<< overloads specifically for std::ostream. Recently we've moved our code to use a generic template <class stream, int N> inline stream& operator<<(stream& os, const BlahClass& value) which conflicts with the boost log helper function, but is useful for our own ostream-like classes. What's the best practice here? Can we make the two mesh by using traits of some sort? Should we do all of our type to string conversions ahead of time using something like folly::to? Cheers, Yi

1 0

[Boost.Log] An update on severity level issue
by Leo Carreon 16 Jul '13

16 Jul '13

Hi all, I am still having the issue with the missing severity level string in the logs and have decided to give you my latest code. Here is my current code: #include <iostream> #include <iomanip> #include <cstdlib> #include <fstream> #include <boost/log/core.hpp> #include <boost/log/sources/global_logger_storage.hpp> #include <boost/log/sources/severity_logger.hpp> #include <boost/log/sources/record_ostream.hpp> #include <boost/log/attributes/clock.hpp> #include <boost/log/attributes/current_process_name.hpp> #include <boost/log/attributes/current_process_id.hpp> #include <boost/log/attributes/current_thread_id.hpp> #include <boost/log/utility/setup/file.hpp> #include <boost/log/utility/setup/from_stream.hpp> #include <boost/log/utility/manipulators/to_log.hpp> #include <boost/log/utility/formatting_ostream.hpp> using namespace std; namespace logging = boost::log; namespace keywords = boost::log::keywords; namespace expr = boost::log::expressions; namespace attr = boost::log::attributes; namespace src = boost::log::sources; #define LFC1_LOG_TRACE(logger) BOOST_LOG_SEV(logger, trace) << "(" << __FILE__ << ", " << __LINE__ << ") " #define LFC1_LOG_DEBUG(logger) BOOST_LOG_SEV(logger, debug) << "(" << __FILE__ << ", " << __LINE__ << ") " #define LFC1_LOG_INFO(logger) BOOST_LOG_SEV(logger, info) << "(" << __FILE__ << ", " << __LINE__ << ") " #define LFC1_LOG_WARNING(logger) BOOST_LOG_SEV(logger, warning) << "(" << __FILE__ << ", " << __LINE__ << ") " #define LFC1_LOG_ERROR(logger) BOOST_LOG_SEV(logger, error) << "(" << __FILE__ << ", " << __LINE__ << ") " static const auto RET_SUCCESS = 0; static const auto RET_FAIL = 1; static const auto LOGGING_ENVIRONMENT_NAME = "LOGGING_CONFIG_FILE_NAME"; static const auto DEFAULT_LOGGING_CONFIG_FILE_NAME = "config/LogSettings.txt"; enum ESeverityLevel { trace, debug, info, warning, error }; BOOST_LOG_ATTRIBUTE_KEYWORD(severity, "Severity", ESeverityLevel) ostream& operator<<(ostream& arStream, ESeverityLevel avLevel) { static const char* pStrings[] = { "trace", "debug", "info", "warning", "error" }; if (static_cast<size_t>(avLevel) < sizeof(pStrings) / sizeof(*pStrings)) { arStream << pStrings[avLevel]; } else { arStream << static_cast<int>(avLevel); } return arStream; } logging::formatting_ostream& operator<< ( logging::formatting_ostream& arStream, logging::to_log_manip<ESeverityLevel, tag::severity> const& arManip ) { static const char* pStrings[] = { "TRACE", "DEBUG", "INFO", "WARNING", "ERROR" }; ESeverityLevel vLevel = arManip.get(); if (static_cast<size_t>(vLevel) < sizeof(pStrings) / sizeof(*pStrings)) { arStream << pStrings[vLevel]; } else { arStream << static_cast<int>(vLevel); } return arStream; } BOOST_LOG_INLINE_GLOBAL_LOGGER_DEFAULT(SLogger, src::severity_logger<ESeverityLevel>) static void gvLoggingInit(const char* apConfigFileName = nullptr) { // Obtain the name of the logging configuration file. if (apConfigFileName == nullptr || apConfigFileName[0] == 0) { if ((apConfigFileName = getenv(LOGGING_ENVIRONMENT_NAME)) == 0 || apConfigFileName[0] == 0) { apConfigFileName = DEFAULT_LOGGING_CONFIG_FILE_NAME; } } // Open the logging configuration file. ifstream vConfigFile(apConfigFileName); if (!vConfigFile.is_open()) { // TODO: throw an exception } // Read the contents of the logging configuration file. logging::init_from_stream(vConfigFile); // Add the logging attributes that we require. auto pCore = logging::core::get(); pCore->add_global_attribute("TimeStamp", attr::local_clock()); pCore->add_global_attribute("Process", attr::current_process_name()); pCore->add_global_attribute("ProcessID", attr::current_process_id()); pCore->add_global_attribute("ThreadID", attr::current_thread_id()); pCore->set_filter(severity >= info); } int main() { auto vRetVal = RET_SUCCESS; try { gvLoggingInit(); auto& vLogger = SLogger::get(); LFC1_LOG_TRACE(vLogger) << "A trace severity message"; LFC1_LOG_DEBUG(vLogger) << "A debug severity message"; LFC1_LOG_INFO(vLogger) << "An informational severity message"; LFC1_LOG_WARNING(vLogger) << "A warning severity message"; LFC1_LOG_ERROR(vLogger) << "An error severity message"; } catch (exception& crException) { cerr << crException.what() << endl; vRetVal = RET_FAIL; } catch (...) { cerr << "Unknown exception" << endl; vRetVal = RET_FAIL; } return vRetVal; } Here is what’s in the settings file: [Core] Filter="%Severity% >= 2" DisableLogging=false [Sinks.File] Destination=TextFile FileName=log/test_logging_%N.log RotationSize=1048576 Target=logs MaxSize=10485760 ScanForFiles=All Format="%TimeStamp% [%Severity%] %Process%:%ProcessID%:%ThreadID% %Message%" As mentioned in a previous post, the issue I’m having is this is how the resulting log records look like: 2013-Jul-16 11:24:59.758177 [] test_logging:000000x9f3:0x403cc6c0 (src/test_logging.cpp, 240) An informational severity message 2013-Jul-16 11:24:59.758812 [] test_logging:000000x9f3:0x403cc6c0 (src/test_logging.cpp, 241) A warning severity message 2013-Jul-16 11:24:59.758851 [] test_logging:000000x9f3:0x403cc6c0 (src/test_logging.cpp, 242) An error severity message Note that the severity string is missing from the above log records. Does anyone know I can fix the code to make the severity string show up in the log records? Another question I have is how do I change the format of the date in the timestamp from YYY-MMM-DD to YYYY-MM-DD. I am sticking to using logging settings from a file because I want an application user to be able to control where log records go. However, I am open to the idea of setting the format within the code but at the moment there is no option of setting the format when a settings file is used. It would be nice to have a function within the logging core which allows us to obtain a pointer/reference to the existing sinks. Kind regards, Leo

1 0

Problems include the RANDOM LIBRARIES, in a console project, in Windows.
by Alberto Aliberti 16 Jul '13

16 Jul '13

I used the Random libraries of Boost collection. I have implemented it in my program. A program for the chess analysis . Now, at compile time I have no problem. Everything ok, the console project is compiled without errors. During run time, the functions of Boost Random libraries, correctly generate a random number. But after a few repetitions of the loop (from 2/3 to a few tens of loops), the program crashes. The strange thing that the crash does not occur in the functions where I use the random functions, but occurs in the chess engine that does not use these functions, and thus in theory should not be influenced by it. But if I do not use the functions of Boost library and use the basic function of C + + (rand ();) I have no problems. I work in Windows. My project is a console project compiled with VC + +2010. Also I have wrote a test program with VC + +2010, which generates a sequence of random numbers, using Boost libraries. In this case I have no problems. Only when I implement the libraries in the chess program I have problems. So it seems that your libraries are in conflict with the chess engine. What do you recommend for the search for the cause of the problem? The headers and the function use by me in my program: #include <boost/random/mersenne_twister.hpp> #include <boost/random/uniform_smallint.hpp> // initializes boost random generator seed boost::random::mt19937 gen; // random function int ransel(int minr,int maxr) { boost::random::uniform_smallint <> dist(minr, maxr); return dist(gen); } ________ Then I call the ransel() function in the loop of my program to select the chess moves.

2 2

quick threading query
by Sean Farrow 15 Jul '13

15 Jul '13

Hi all, I have a quick threading query. I'm in the process of rewriting an application to take advantage of concurrency. This application is cross-platform so I'm looking at the boost threading library to solve the issue. When the window is created I'm creating a thread, then when the user chooses to quit I need to notify the created thread to stop running. Would a future do the job, if this is the case where should this be stored in the class that represents the window or in the class that represents the thread, I'm really not wanting to store this globally. Any help appreciated. Cheers Sean.

2 1

1.54.0 breaks bcp-produced partial builds?
by Bruce Stephens 15 Jul '13

15 Jul '13

Back in 1.53.0, I could do the following: ./bootstrap.sh (cd tools/bcp; ../../b2) bin.v2/.../bcp build filesystem .../temp Then in .../temp run ./bootstrap.sh and ./b2 to build just filesystem (or whatever else I copied). In 1.54.0, the copy doesn't build: brs% ./b2 Building the Boost C++ Libraries. /auto/tmpfs/temp/tools/build/v2/build/targets.jam:397: in find-really *** argument error * rule project.is-registered-id ( id ) * called with: ( ) * missing argument id /auto/tmpfs/temp/tools/build/v2/build/project.jam:600:see definition of rule 'project.is-registered-id' being called /auto/tmpfs/temp/tools/build/v2/build/targets.jam:457: in class(a)project-target.find /auto/tmpfs/temp/tools/build/v2/build/targets.jam:841: in resolve-reference /auto/tmpfs/temp/tools/build/v2/build/targets.jam:858: in targets.generate-from-reference /auto/tmpfs/temp/tools/build/v2/build/targets.jam:1245: in generate-dependencies /auto/tmpfs/temp/tools/build/v2/build/targets.jam:1302: in class(a)basic-target.generate /auto/tmpfs/temp/tools/build/v2/build/targets.jam:757: in generate-really /auto/tmpfs/temp/tools/build/v2/build/targets.jam:729: in class(a)main-target.generate /auto/tmpfs/temp/tools/build/v2/build/targets.jam:272: in class(a)project-target.generate /auto/tmpfs/temp/tools/build/v2/build/targets.jam:874: in targets.generate-from-reference /auto/tmpfs/temp/tools/build/v2/build/targets.jam:1245: in generate-dependencies /auto/tmpfs/temp/tools/build/v2/build/targets.jam:1302: in class(a)basic-target.generate /auto/tmpfs/temp/tools/build/v2/build/targets.jam:757: in generate-really /auto/tmpfs/temp/tools/build/v2/build/targets.jam:729: in class(a)main-target.generate /auto/tmpfs/temp/tools/build/v2/build/targets.jam:874: in targets.generate-from-reference /auto/tmpfs/temp/tools/build/v2/build/targets.jam:1245: in generate-dependencies /auto/tmpfs/temp/tools/build/v2/build/targets.jam:1302: in alias-target-class.generate /auto/tmpfs/temp/boostcpp.jam:391: in build-multiple /auto/tmpfs/temp/boostcpp.jam:353: in class(a)top-level-target.generate /auto/tmpfs/temp/tools/build/v2/build/targets.jam:757: in generate-really /auto/tmpfs/temp/tools/build/v2/build/targets.jam:729: in class(a)main-target.generate /auto/tmpfs/temp/tools/build/v2/build/targets.jam:874: in targets.generate-from-reference /auto/tmpfs/temp/tools/build/v2/build/targets.jam:1245: in generate-dependencies /auto/tmpfs/temp/tools/build/v2/build/targets.jam:1302: in alias-target-class.generate /auto/tmpfs/temp/boostcpp.jam:391: in build-multiple /auto/tmpfs/temp/boostcpp.jam:353: in class(a)top-level-target.generate /auto/tmpfs/temp/tools/build/v2/build/targets.jam:757: in generate-really /auto/tmpfs/temp/tools/build/v2/build/targets.jam:729: in class(a)main-target.generate /auto/tmpfs/temp/tools/build/v2/build/targets.jam:272: in class(a)project-target.generate /auto/tmpfs/temp/tools/build/v2/build-system.jam:707: in load /auto/tmpfs/temp/tools/build/v2/kernel/modules.jam:289: in import /auto/tmpfs/temp/tools/build/v2/kernel/bootstrap.jam:139: in boost-build /auto/tmpfs/temp/boost-build.jam:17: in module scope

1 1

Re: [Boost-users] [Boost.Log] More queries
by Leo Carreon 15 Jul '13

15 Jul '13

From: Leo Carreon Sent: Saturday, July 13, 2013 3:51 PM To: Boost Users Mailing List Subject: [Boost.Log] More queries Hi everyone, As I have mentioned in a previous post, I have been trying to learn how to use Boost.Log. I have been experimenting with logging to a file with filtering and specifying the log formatting in three different ways, namely: 1. Specifying the log formatting using a lambda type expression. 2. Specifying the log formatting using a plain text string with placeholders for the attributes that I have defined. 3. Specifying the log formatting in a settings file. (However, the formatting string is exactly the same as in 2 above.) I have attached a copy of my source code and settings file. Note that I comment out parts of the source code file depending on which option I use above. The problem I’m encountering is when I use options 2 & 3 above, the severity level string does not appear in the log. But if I use option 1, the severity level string appears as expected. It is my understanding that severity level is a pre-defined attribute when using a severity_logger. Am I missing something when using options 2 & 3? If I decide to use my own severity level enumeration, what do I need to do? Kind regards, Leo Hi again everyone, I have managed to use my own severity level enumeration but the severity level string is still not appearing in the log. Regards again, Leo

2 4

boost-libs failed to be built (via pkgsrc)
by Isaac Isao Saito 15 Jul '13

15 Jul '13

Hi boost-users, during source installation of `boost-libs` (link to cvs repo[0]), I get the following at the very end of long output of bmake (`make` that's used in the package manager `pkgsrc` that I use) and build seems to fail: ...skipped <pbin.v2/libs/wave/build/gcc-4.4.2/release/link-static/threading-multi>libboost_wave.a for lack of <pbin.v2/libs/wave/build/gcc-4.4.2/release/link-static/threading-multi>instantiate_cpp_exprgrammar.o... ...skipped <pstage/lib>libboost_wave.a for lack of <pbin.v2/libs/wave/build/gcc-4.4.2/release/link-static/threading-multi>libboost_wave.a... ...failed updating 181 targets... ...skipped 280 targets... *** Error code 1 Stop. bmake: stopped in /usr/pkgsrc/devel/boost-libs *** Error code 1 I noticed, out of thousands of output lines (full output[1]), some lines of error repeatedly appear. I just except some (note that they don't occur back to back like the following): g++: unrecognized option '-pthread' ./boost/cstdint.hpp:74: error: 'intleast8_t' in namespace '::' does not name a type ./boost/cstdint.hpp:76: error: 'uintleast8_t' in namespace '::' does not name a type ./boost/chrono/detail/inlined/posix/chrono.hpp:23: error: '::clock_gettime' has not been declared ./boost/chrono/detail/inlined/posix/chrono.hpp:36: error: '::clock_gettime' has not been declared ./boost/chrono/detail/inlined/posix/process_cpu_clocks.hpp:31: error: '::sysconf' has not been declared ./boost/chrono/detail/inlined/posix/process_cpu_clocks.hpp:31: error: '_SC_CLK_TCK' was not declared in this scope /usr/qnx650/host/qnx6/x86/usr/bin/ntox86-ld: cannot find -lrt ./boost/smart_ptr/detail/yield_k.hpp:123: error: 'nanosleep' was not declared in this scope ./boost/thread/pthread/timespec.hpp:84: error: '::clock_gettime' has not been declared ./boost/thread/pthread/mutex.hpp:275: error: 'boost::chrono::steady_clock' has not been declared libs/filesystem/src/operations.cpp: In function 'bool<unnamed>::remove_directory(const boost::filesystem::path&)': libs/filesystem/src/operations.cpp:345: error: '::rmdir' has not been declared libs/filesystem/src/operations.cpp:348: error: '::unlink' has not been declared libs/filesystem/src/operations.cpp:427: error: no matching function for call to 'stat::stat(const char*, stat*)' libs/filesystem/src/operations.cpp:1003: error: '::symlink' has not been declared ``` Other `boost`-related packages (namely boost-headers, boost-jam, boost-docs, boost-build) are already built and installed. `boost-python` fails to be built, but I assume it's not depended by boost-libs. Using `QNX` 6.5.0 SDP SP1. boost seems to be 1.53.0 What could be wrong? Thank you very much. [0] http://cvsweb.netbsd.org/bsdweb.cgi/pkgsrc/devel/boost-libs/#dirlist [1] http://pastebin.com/ZMU3ddXf -- Isaac

1 0

From Big-endian to Little-endian.
by Mauro Ziliani 15 Jul '13

15 Jul '13

Hi all. This is my first post. I'm working with boost::asio::ip::tcp to dialogate with a peripheral which send frames grouped in words (16 bit values). The peripheral uses a big-endian byte-order, while the host uses a little-endian byte-order. Is there some template which makes the swap automatically? Best regards, Mauro

1 0

VS2012: libboost_filesystem-vc110-mt-gd-1_54.lib missing
by Amann, Julian 15 Jul '13

15 Jul '13

Hello, I built boost 1.54.0 with Visual Studio 2012 x64. I tried to build a small demo that is using boost filesystem: ///////////////////////////////////////////////////////////////////// #include <iostream> #include <boost/filesystem.hpp> using namespace boost::filesystem; int main(int argc, char* argv[]) { if (argc < 2) { std::cout << "Usage: tut1 path\n"; return 1; } std::cout << argv[1] << " " << file_size(argv[1]) << '\n'; return 0; } ///////////////////////////////////////////////////////////////////// CMake is used to setup the corresponding project for VS2012 x64: ################################################# CMAKE_MINIMUM_REQUIRED(VERSION 2.8.9) PROJECT(FilesystemTest) set_property(GLOBAL PROPERTY USE_FOLDERS ON) SET(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/build/) # Visual Studio 2010 Pro Standard: /DWIN32 /D_WINDOWS /W3 /Zm1000 /EHsc /GR SET(CMAKE_CXX_FLAGS "/DWIN32 /D_WINDOWS /W4 /Zi /EHsc /GR- /MP /openmp") SET(CMAKE_DEBUG_POSTFIX "d") FIND_PACKAGE(Boost COMPONENTS filesystem system REQUIRED) # Unicode rules! ADD_DEFINITIONS(-D_UNICODE) include_directories(${Boost_INCLUDE_DIR}) LINK_DIRECTORIES( ${Boost_LIBRARY_DIRS} ) file(GLOB FilesystemTest_SOURCES src/*.*) # Create a target for the library ADD_EXECUTABLE(FilesystemTest ${FilesystemTest_SOURCES}) ################################################# But when compiling I get 'libboost_filesystem-vc110-mt-gd-1_54.lib' is missing. Previously I used boost 1.53.0 - everything was working perfect when using boost 1.53.0. When looking into the boost 1.54 lib folder there is only a 'boost_filesystem-vc110-mt-gd-1_54.lib' and a 'libboost_filesystem-vc110-mt-sgd-1_54.lib' I compiled boost using this instructions: 1. Download boost 1.54.0 from http://www.boost.org/ 2. Extract files (e.g. "C:\thirdparty\vs2013\x64\boost_1_54_0") 3. Start Visual Studio 2012 x64 command prompt 4. Change to boost directory (e.g. "cd C:\thirdparty\vs2010\x64\boost_1_54_0") 5. Execute .\bootstrap.bat 6. Execute b2 address-model=64 toolset=msvc-11.0 --build-type=complete stage BTW: If only certain libraries (for instance filesystem) are need step 6 can be replaced by this: b2 address-model=64 toolset=msvc-11.0 --build-type=complete stage --with-filesystem --with-signals --with-system I could not figure out what is working wrong. Any ideas? Best regards Julian

1 0

issues compiling Boost 1.54 thread on AIX5.2
by Gert 15 Jul '13

15 Jul '13

Any clues here? Regards, Gert vacpp.compile.c++ bin.v2/libs/thread/build/vacpp/debug/address-model-64/link-static/runtime-link-static/threading-multi/pthread/thread.o xlC_r -c -DBOOST_ALL_NO_LIB=1 -DBOOST_SYSTEM_STATIC_LINK=1 -DBOOST_THREAD_BUILD_LIB=1 -DBOOST_THREAD_DONT_USE_CHRONO -DBOOST_THREAD_POSIX -qcpluscmt -qNOOPTimize -qnoinline -q64 -g -qfullpath -qfuncsect -qeh -qrtti -I"." -o "bin .v2/libs/thread/build/vacpp/debug/address-model-64/link-static/runtime-link-static/threading-multi/pthread/thread.o" "libs/thread/src/pthread/thread.cpp" "./boost/smart_ptr/shared_ptr.hpp", line 82.43: 1540-0403 (S) "template <class T, std::size_t N> struct boost::detail::sp_element<T [N]>" is already defined. "./boost/smart_ptr/shared_ptr.hpp", line 75.28: 1540-0425 (I) "sp_element<T []>" is defined on line 75 of "./boost/smart_ptr/shared_ptr.hpp". "./boost/smart_ptr/shared_ptr.hpp", line 131.43: 1540-0403 (S) "template <class T, std::size_t N> struct boost::detail::sp_dereference<T [N]>" is already defined. "./boost/smart_ptr/shared_ptr.hpp", line 124.28: 1540-0425 (I) "sp_dereference<T []>" is defined on line 124 of "./boost/smart_ptr/shared_ptr.hpp". "./boost/smart_ptr/shared_ptr.hpp", line 156.43: 1540-0403 (S) "template <class T, std::size_t N> struct boost::detail::sp_member_access<T [N]>" is already defined. "./boost/smart_ptr/shared_ptr.hpp", line 149.28: 1540-0425 (I) "sp_member_access<T []>" is defined on line 149 of "./boost/smart_ptr/shared_ptr.hpp". "./boost/smart_ptr/shared_ptr.hpp", line 181.43: 1540-0403 (S) "template <class T, std::size_t N> struct boost::detail::sp_array_access<T [N]>" is already defined. "./boost/smart_ptr/shared_ptr.hpp", line 174.28: 1540-0425 (I) "sp_array_access<T []>" is defined on line 174 of "./boost/smart_ptr/shared_ptr.hpp". "./boost/thread/detail/async_func.hpp", line 94.58: 1540-0711 (S) Too few template arguments have been specified. "./boost/thread/detail/async_func.hpp", line 166.54: 1540-0711 (S) Too few template arguments have been specified. "./boost/thread/detail/async_func.hpp", line 231.50: 1540-0711 (S) Too few template arguments have been specified. "./boost/thread/detail/async_func.hpp", line 291.46: 1540-0711 (S) Too few template arguments have been specified. "./boost/thread/detail/async_func.hpp", line 346.42: 1540-0711 (S) Too few template arguments have been specified. "./boost/thread/detail/async_func.hpp", line 396.38: 1540-0711 (S) Too few template arguments have been specified. "./boost/thread/detail/async_func.hpp", line 441.34: 1540-0711 (S) Too few template arguments have been specified. "./boost/thread/detail/async_func.hpp", line 481.30: 1540-0711 (S) Too few template arguments have been specified. "./boost/thread/detail/async_func.hpp", line 516.26: 1540-0711 (S) Too few template arguments have been specified. "./boost/thread/detail/async_func.hpp", line 546.22: 1540-0711 (S) Too few template arguments have been specified. "./boost/thread/cv_status.hpp", line 23.3: 1540-0219 (S) The call to "operator==" has no best match. "./boost/thread/cv_status.hpp", line 23.3: 1540-1229 (I) Argument number 1 is an rvalue of type "boost::cv_status::enum_type". "./boost/thread/cv_status.hpp", line 23.3: 1540-1229 (I) Argument number 2 is an rvalue of type "boost::cv_status::enum_type". "./boost/thread/cv_status.hpp", line 23.3: 1540-1202 (I) No candidate is better than "builtin operator==(int, int)". "./boost/thread/cv_status.hpp", line 23.3: 1540-1231 (I) The conversion from argument number 1 to "int" uses "an integral promotion". "./boost/thread/cv_status.hpp", line 23.3: 1540-1231 (I) The conversion from argument number 2 to "int" uses "an integral promotion". "./boost/thread/cv_status.hpp", line 23.3: 1540-1202 (I) No candidate is better than "boost::operator==(self_type, enum_type)". "./boost/thread/cv_status.hpp", line 23.3: 1540-1231 (I) The conversion from argument number 1 to "boost::cv_status" uses the user-defined conversion "boost::cv_status::cv_status(enum_type)" followed by "an lvalue-to-rvalue transformatio n". ... ... -- View this message in context: http://boost.2283326.n4.nabble.com/issues-compiling-Boost-1-54-thread-on-AI… Sent from the Boost - Users mailing list archive at Nabble.com.

4 4

[serialization] unregistered class exception during serialization from DLL
by Andreas Mainik 14 Jul '13

14 Jul '13

Hello All, I have some classes needed to be serialized (A.HPP und A.CPP below). The serialization happens over the pointer to the base class. The code is called in the function (FUNC.CPP below). The files A.HPP, A.CPP and FUNC.CPP are constituents of a bigger DLL-library. If my test application is linked dynamical against the DLL-libary then the code throws an exception "unregistered class - derived class not registered or exported". What is wrong in my code? The code is compiled with Visual Studio 2012 (default settings). Boost: 1.53.0 If I look into BOOST_SERIALIZATION_DECL(const extended_type_info *) extended_type_info_typeid_0::get_extended_type_info( const std::type_info & ti ) const { typeid_system::extended_type_info_typeid_arg etia(ti); const tkmap & t = singleton<tkmap>::get_const_instance(); const tkmap::const_iterator it = t.find(& etia); if(t.end() == it) return NULL; return *(it); } then I see that Ord<Options> is not registered in singleton<tkmap>::get_const_instance(). Moreover, I am not able to set breakpoint into Ord<Options>::serialize(). According to MSVC debugger the breakpoint will not be hit. Additional remarks: 1) If I uncomment the code lines in FUNC.CPP then everything works. 2) If I link the code statical to my test application then everything is also fine. -----------------------A.HPP----------------------------------------------- #include "archive.hpp" // includes the required headers struct OrdBasis { virtual ~OrdBasis() {} virtual bool is_base_of(const boost::shared_ptr<OrdBasis>& derived_ptr) { return true; } private: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int /* file_version */){ } }; template<typename P> struct Ord; struct Options { Options() {} friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int /* file_version */){ } }; template<> class Ord<Options> : public OrdBasis { typedef Ord<Options> P; bool is_base_of(const boost::shared_ptr<OrdBasis>& derived_ptr) { const boost::shared_ptr<P> base_ptr = boost::dynamic_pointer_cast<P>(derived_ptr); bool result = (base_ptr) ? true : false; return result; } private: friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int /* file_version */){ ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(OrdBasis); } }; BOOST_CLASS_EXPORT_KEY(Ord<Options>) -----------------------A.HPP------------------------------------------- -----------------------A.CPP------------------------------------------- #include "A.hpp" BOOST_CLASS_EXPORT_IMPLEMENT(Ord<Options>) -----------------------A.CPP------------------------------------------- I serialize with following sequence ---------------------FUNC.CPP------------------------------------------ void serializeFunc() { namespace io = boost::iostreams; typedef std::vector<char> buffer_type; buffer_type buffer; buffer.reserve(2000000); { buffer.clear(); io::stream<io::back_insert_device<buffer_type> > output_stream(buffer); boost::archive::binary_oarchive oa(output_stream, boost::archive::no_header); // begin //if the following lines are commented out then everything works //boost::shared_ptr<Ord<Options>> testOptOrd(new Ord<Options>); //oa & testOptOrd; //end boost::shared_ptr<OrdBasis> testOptOrdB(new Ord<Options>); oa & testOptOrdB; } { io::basic_array_source<char> source(&buffer[0],buffer.size()); io::stream<io::basic_array_source <char> > input_stream(source); boost::archive::binary_iarchive ia(input_stream, boost::archive::no_header); boost::shared_ptr<OrdBasis> testOptOrd; // begin linked to the above code block //ia & testOptOrd; // end ia & testOptOrd; int i = 0; } } -----------------------FUNC.CPP------------------------------------ -- Using Opera's revolutionary email client: http://www.opera.com/mail/

2 3

[Boost.Geometry] - Union generates polygon with punctures
by Olivier Heriveaux 14 Jul '13

14 Jul '13

Hello ! I'm trying to use Boost.Geometry library to implement Minkowsky algorithm (i.e. polygon convolution). I try to implement it in the same way Boost.Polygon does, but during the algorithm execution, a boost::geometry::overlay_invalid_input_exception is raised. It seems that one of the input polygons to the union_ function is invalid. To understand my mistake, I outputed the operand polygons to SVG files and I discovered punctures in one of them. I believe Boost.Geometry thinks my polygon is self-intersecting (may be due to precision error with floats ?) - but this polygon itself is the result of a previous union operation. For info, I attached the SVG file (use inkscape to see it completely since segments are out of the box due to negative coordinates). I don't know if solutions to this problem exists or if the library is faulty (the bad polygon is the result of an union operation). One workaround would be to detect punctures and remove them, but it's kind of ugly imho... Some more details: - point coordinates type is float, - I use custom class instead of point_xy model, - polygon winding is counter-clockwise. Thank you in advance for any help, Olivier

2 5

[multi_index][ann] Boost.MultiIndex 1.55 preview: major update with C++11 capabilities
by Joaquín Mª López Muñoz 14 Jul '13

14 Jul '13

Dear Boost.MultiIndex user: I've completed a major update of Boost.MultiIndex retrievable from the SVN repository, trunk branch, or at: https://www.dropbox.com/s/xipv129az88vgd1/multi_index_130713.zip This update includes many C++11 capabilities (most emulated by various means in pre-C++11 compilers,) among them the following: * multi_index_container is now efficiently movable employee_set extract_employees(const std::string& db); employee_set cont=extract_employees("employees.dat"); // no data copying * Initializer lists supported (if the compiler provides them) employee_set es8{{0,"Rose",40,4512},{1,"Mary",38,3345},{2,"Jo",25,7102}}; * Emplace functions es.emplace(0,"Joe",31,1123); es.get<3>().emplace_back(3,"Judy",39,6201); * Non-copyable elements allowed typeded multi_index_container< std::unique_ptr<employee>, indexed_by<...> > employee_ptr_set; How does this update affect you? 1. Of course, you can now begin using the new capabilities, even in non-C++11 compilers with some limitations (explained at the documentation). 2. Your code can get some transparent performance gain without you doing anything es.insert(employee(4,"Jill",52,3379)); // temporary's moved rather than copied 3. The internal code has been refactored to implement the new features, and this refactoring touches on preexisting functionality, hopefully without producing regressions --this has been thoroughly tested, but: It is now #3 that worries me the most: if you use Boost.MultiIndex and have some time to test this preview with your code, please do so and report the results. The more this update is tested before the official release, the less problems it will cause (ideally none.) As the update is major, every bit of testing helps. Hope you enjoy the new features. Best regards, Joaquín M López Muñoz Telefónica Digital ________________________________ Este mensaje se dirige exclusivamente a su destinatario. Puede consultar nuestra política de envío y recepción de correo electrónico en el enlace situado más abajo. This message is intended exclusively for its addressee. We only send and receive email on the basis of the terms set out at: http://www.tid.es/ES/PAGINAS/disclaimer.aspx

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Boost.Log SimpleEventLog question
by Pieter 13 Jul '13

13 Jul '13

LS, I am currently configuring my logging configuration using a property tree. When I include a SimpleEventLog sink, how can I apply an event type mapping to that sink? In the stated example this is done before the sink is added to the core: typedef sinks::synchronous_sink< sinks::simple_event_log_backend > sink_t; boost::shared_ptr< sink_t > sink(new sink_t()); sinks::event_log::custom_event_type_mapping< severity_level > mapping("Severity"); // . define mapping here . sink->locked_backend()->set_event_type_mapper(mapping); // Add the sink to the core logging::core::get()->add_sink(sink); but adding the sink happens behind the scenes when using the configuration utilities. BTW, in the section "Simplified library initialization tools" of the documentation Table 1.15 seems to miss a 'Format' parameter that I assume is still needed? Many thanks, Pieter

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[Boost.Log] More queries
by Leo Carreon 13 Jul '13

13 Jul '13

Hi everyone, As I have mentioned in a previous post, I have been trying to learn how to use Boost.Log. I have been experimenting with logging to a file with filtering and specifying the log formatting in three different ways, namely: 1. Specifying the log formatting using a lambda type expression. 2. Specifying the log formatting using a plain text string with placeholders for the attributes that I have defined. 3. Specifying the log formatting in a settings file. (However, the formatting string is exactly the same as in 2 above.) I have attached a copy of my source code and settings file. Note that I comment out parts of the source code file depending on which option I use above. The problem I’m encountering is when I use options 2 & 3 above, the severity level string does not appear in the log. But if I use option 1, the severity level string appears as expected. It is my understanding that severity level is a pre-defined attribute when using a severity_logger. Am I missing something when using options 2 & 3? If I decide to use my own severity level enumeration, what do I need to do? Kind regards, Leo

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Re: [Boost-users] Query on Boost.Log
by Leo Carreon 13 Jul '13

13 Jul '13

From: Leo Carreon Sent: Friday, July 12, 2013 8:42 AM To: Boost Users Mailing List Subject: Query on Boost.Log Hi everyone, I’m trying to learn how to use Boost.Log from Boost 1.54.0 on Fedora 18. When I attempt to call boost::log::init_from_stream() even with BOOST_LOG_DYN_LINK defined, I get the error message”undefined reference to `void boost::log::v2_mt_posix::init_from_stream<char>(std::basic_istream<char, std::char_traits<char> >&)'” for the line where I called the function. Note that I have included the header file “boost/log/utility/setup/from_stream.hpp” and added –lboost_log to my link command line. Am I missing something. I have noticed that boost::log::init_from_stream() is a template. Is an instance of this template added into the shared library? Kind regards, Leo Hi again everyone, FYI. I built Boost 1.54.0 using the following bjam options – link=shared runtime-link=shared I have also checked the build logs from the above and discovered that not all of the .cpp files in libs/log/src have been included during the build. Kind regards, Leo

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[exception] exception_ptr missing virtual base parameters
by Michael Caisse 13 Jul '13

13 Jul '13

The basic problem I'm experiencing is that getting an exception_ptr results inherited parameters getting lost when virtual inheritance is used. The code below demonstrates a simple example. "bar" is lost in the print. Changing derived_except to be: struct derived_except : base_except { int i; }; will cause the inherited values to be copied into the exception_ptr; however, this has all the standard problems associated that come with not using virtual inheritance. This looks like a bug to me. The C++11 equivalent behaves has expected and inherited values are maintained in the exception_ptr. Any thoughts? michael -------------- boost::exception_ptr version -------------- #include <boost/exception/all.hpp> #include <string> #include <iostream> struct base_except { std::string s; }; struct derived_except : virtual base_except { int i; }; int main() { derived_except e; e.i = 8; e.s = "bar"; boost::exception_ptr ptr = boost::copy_exception(e); try { boost::rethrow_exception(ptr); } catch(derived_except & e) { std::cout << "derived_except: " << e.s << " " << e.i << std::endl; } catch(...) {} return 0; } -------------- c++11 version --------------------- #include <exception> #include <string> #include <iostream> struct base_except { std::string s; }; struct derived_except : virtual base_except { int i; }; int main() { derived_except e; e.i = 8; e.s = "bar"; std::exception_ptr ptr = std::make_exception_ptr(e); try { std::rethrow_exception(ptr); } catch(derived_except & e) { std::cout << "derived_except: " << e.s << " " << e.i << std::endl; } catch(...) {} return 0; } -- Michael Caisse ciere consulting ciere.com

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Re: [Boost-users] [graph] in-depth parsing and modifications of the graph
by Orianne Siret 12 Jul '13

12 Jul '13

I mean traverse when i said parse. So the problem is i can't traverse in depth-first order my graph and modify node (or edge) properties. I wrote a basic case which doesn't work. ----------------------------------------- // Begin main.cpp #include <boost/graph/adjacency_list.hpp> #include <boost/graph/depth_first_search.hpp> #include <vector> // Node properties struct MyNode { int node_id; MyNode() : node_id() {} MyNode(int id) : node_id(id) {} }; //Edge Properties struct MyEdge { int edge_id; MyEdge() : edge_id() {} MyEdge(int id) : edge_id(id) {} }; // Graph definition typedef boost::adjacency_list< boost::vecS, boost::vecS, boost::directedS, MyNode, MyEdge > MyGraph; typedef boost::graph_traits<MyGraph>::vertex_descriptor MyGraphVD; //My idiot visitor class my_dfs_visitor : public boost::default_dfs_visitor { public: template < typename Vertex, typename Graph > void discover_vertex(Vertex u, Graph & g) { // here i cant assign 0 to m node_id. however g is not cont.. I didn't find a code with a depth-first traversal and assign ment. g[u].node_id = 0; } }; int main() { MyGraph g; MyGraphVD vd0 = boost::add_vertex(MyNode(0), g); MyGraphVD vd1 = boost::add_vertex(MyNode(1), g); boost::add_edge(vd0, vd1, MyEdge(), g); boost::add_edge(vd1, vd0, MyEdge(), g); my_dfs_visitor visitor; boost::depth_first_search(g, boost::visitor(visitor)); return 0; } // end ------------------------------------------ This code doesn't work. I have the following error : ../main.cpp:35:3: erreur: assignment of member 'MyNode::node_id' in read-only object. (I do: "g++ -O3 -Wall -c -o main.o main.cpp " for compilation, i run on linux ubuntu 12.04 with gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3) I didn't find any example on the web.. Thanks for spending time on my problem. It is very nice of you. Best regards. Orianne Siret

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BOOST_STATIC_ASSERT with boost::array.static_size
by Anton Daneyko 12 Jul '13

12 Jul '13

Dear boost users, could someone tell me why this short program does not compile? #include <boost/array.hpp> #include <boost/static_assert.hpp> int main(int argc, const char *argv[]) { boost::array<int, 3> a1 = {{1, 1, 1}}; BOOST_STATIC_ASSERT(a1.static_size == 3); return 0; } With g++ (4.3.4) I get the following error: tmp.cpp: In function ‘int main(int, const char**)’: tmp.cpp:7: error: ‘a1’ cannot appear in a constant-expression tmp.cpp:7: error: `.' cannot appear in a constant-expression tmp.cpp:7: error: template argument 1 is invalid With icc (12.1.6) I get the following error: tmp.cpp(7): error: this operator is not allowed in a template argument expression BOOST_STATIC_ASSERT(a1.static_size == 3); ^ tmp.cpp(7): error: incomplete type is not allowed BOOST_STATIC_ASSERT(a1.static_size == 3); ^ compilation aborted for tmp.cpp (code 2) However I can compile using IBM xlC compiler. I thought that static_size is a compile time constant and can be used in this context...

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Query on Boost.Log
by Leo Carreon 11 Jul '13

11 Jul '13

Hi everyone, I’m trying to learn how to use Boost.Log from Boost 1.54.0 on Fedora 18. When I attempt to call boost::log::init_from_stream() even with BOOST_LOG_DYN_LINK defined, I get the error message”undefined reference to `void boost::log::v2_mt_posix::init_from_stream<char>(std::basic_istream<char, std::char_traits<char> >&)'” for the line where I called the function. Note that I have included the header file “boost/log/utility/setup/from_stream.hpp” and added –lboost_log to my link command line. Am I missing something. I have noticed that boost::log::init_from_stream() is a template. Is an instance of this template added into the shared library? Kind regards, Leo

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Procedure entry point _ZNSt16invalid_argumentD2Ev could not be located in the dynamic link library libstdc++-6.dll
by Joe Hays 11 Jul '13

11 Jul '13

Hello all, I have a newbie question for you. I'm trying Boost for the very first time. I'm also not terribly experienced with C++. I'm using, Eclipse Kepler (latest) Mingw 3.20 (latest) Boost_1_54_0 on a 64-bit Windows 7 machine. I followed this tutorial to configure Boost to be used with Mingw and Eclipse: http://theseekersquill.wordpress.com/2010/08/24/howto-boost-mingw/ Sections 1-6 performed as expected. The 7th and final step is when a "hello world" like application finally compiles and links Boost into a .exe. I cut-n-paste the following code from Boost's Getting Started tutorial ( http://www.boost.org/doc/libs/1_54_0/more/getting_started/windows.html) <snip> #include <boost/regex.hpp> #include <iostream> #include <string> int main() { std::string line; boost::regex pat( "^Subject: (Re: |Aw: )*(.*)" ); while (std::cin) { std::getline(std::cin, line); boost::smatch matches; if (boost::regex_match(line, matches, pat)) std::cout << matches[2] << std::endl; } } </snip> The output of the build is, <snip> 12:20:46 **** Rebuild of configuration Debug for project BoostRegexExample1 **** Info: Internal Builder is used for build g++ "-Ic:\\boost_1_54_0" -O0 -g3 -Wall -c -fmessage-length=0 -o BoostRegexExample1.o "..\\BoostRegexExample1.cpp" g++ "-LC:\\boost_1_54_0\\stage\\lib" -o BoostRegexExample1.exe BoostRegexExample1.o -lboost_regex-mgw46-mt-1_54 12:20:52 Build Finished (took 5s.992ms) </snip> If I try to run that application within Eclipse the terminal simply states the application terminated. If I go to a terminal and run the .exe (using a text file as in input as directed in the Getting Started document) I get, *"Procedure entry point _ZNSt16invalid_argumentD2Ev could not be located in the dynamic link library libstdc++-6.dll"* Any ideas why this is happening? And, what I can do to get past this? Thanks, Joe

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boost::uuid
by John Emmas 11 Jul '13

11 Jul '13

Hello there, I'm developing an app (originally written for Linux) which uses some UUID functionality that originally came from a set of e2fs utilities for Linux. I'm porting the app to Windows so naturally, the e2fs stuff doesn't build. I need to find a UUID implemntation that's more cross-platform - and of course, the obvious one to try is boost::uuid. I first installed boost when it was at version 1.40 (1-2 years ago?) Anyway, my installed version doesn't include UUID so I decided to update to a more recent version. The most recent Windows installer I could find was for version 1.51, from BoostPro:- http://www.boostpro.com/download/ Unfortunately, it probably isn't the absolute latest because BoostPro is apparently now discontinued - but it should be recent enough to include the UUID modules. From what I can gather, boost::uuid has been around since at least version 1.42. However, I hit a couple of problems:- 1) Firstly, I seem to get errors, no matter which mirror I use. I'll try again later, in case the errors go away. 2) Despite the errors, something does seem to get downloaded. However, rather than installing all the source files / DLLs etc, I just get a subdirectory called "lib" which contains a bunch of zip files (over 100). My original (1.40) installation seemed to unpack everything for me. 3) AFAICT even ver 1.51 doesn't include any UUID functionality. There was nothing for UUID that was selectable in the installer - and none of the modules look like UUID. I seem to have boost::regex, boost::filesystem, boost:date_time and a whole load of other stuff - but no boost::uuid :-( I then came across this web page which seems to suggest that all I need to do is add one header file to my existing installation (boost/uuid.hpp). Am I over-thinking this?? Is that all there is to it?? Thanks. John

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[graph] in-depth parsing and modifications of the graph
by Orianne Siret 11 Jul '13

11 Jul '13

Hello, I would like to know if it is possible to parse a boost graph in depth while being able to modify the properties of the verices you parse ? I saw there is a in-depth parser but it seems to not allow the modifications of properties ? Thanks in advance for your help ! Orianne Siret

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[asio] Incorrect reporting of bytes transferred in write handler in 1.54
by Darren 11 Jul '13

11 Jul '13

Is anybody else seeing problems with the bytes_transferred reported to the write_handler after a successful async_write? I am seeing a value of zero despite the fact that the peer receives the bytes and no error is reported to the write_handler. My example code when built against 1.54 exhibits the problem whereas building against 1.53 works correctly. I am running on Windows 7 with MSVC 2010. A couple of notes: * I only see the problem when the number of threads is > 1, even though the handlers are invoked on a strand. * Defining BOOST_ASIO_DISABLE_IOCP makes everything work properly. When running my code a failure shows itself like this: Client: Writing value 85 Server: Received 4 bytes, value 85 Client: bytesWritten = 0 In other words, the client used async_write to send 4 bytes with long value 85 the server. The server received these bytes. The client write_handler was called with no error but a bytes_transferred value of 0. Is there something I don't understand or is this a problem introduced in 1.54? #include <boost/asio.hpp> #include <boost/thread.hpp> #include <boost/thread/mutex.hpp> #include <iostream> using namespace boost::asio; const std::size_t NumThreads = 2; const unsigned short Port = 12345; // Prevent interleaved output boost::mutex logMutex; struct Server { Server(io_service& svc) : m_socket(svc), m_acceptor(svc, ip::tcp::endpoint(ip::tcp::v4(), Port)), m_buffer(0) { } void Run() { m_acceptor.accept(m_socket); // Simple blocking reads while(std::size_t bytesRead = read(m_socket, buffer(&m_buffer, sizeof(m_buffer)))) { boost::mutex::scoped_lock lock(logMutex); std::cout << "Server: Received " << bytesRead << " bytes, value " << m_buffer << std::endl; } } ip::tcp::socket m_socket; ip::tcp::acceptor m_acceptor; unsigned long m_buffer; }; struct Client { Client(io_service& svc) : m_strand(svc), m_socket(svc), m_buffer(0) { m_socket.connect( ip::tcp::endpoint(ip::address_v4::from_string("127.0.0.1"), Port)); ScheduleWrite(); } void WriteHandler(const boost::system::error_code& err, std::size_t bytesWritten) { assert(!err); if(bytesWritten != sizeof(m_buffer)) { boost::mutex::scoped_lock lock(logMutex); std::cout << "Client: bytesWritten = " << bytesWritten << std::endl; return; } ScheduleWrite(); } void ScheduleWrite() { { boost::mutex::scoped_lock lock(logMutex); std::cout << "Client: Writing value " << ++m_buffer << std::endl; } async_write(m_socket, buffer(&m_buffer, sizeof(m_buffer)), m_strand.wrap( std::bind(&Client::WriteHandler, this, std::placeholders::_1, std::placeholders::_2))); } io_service::strand m_strand; ip::tcp::socket m_socket; unsigned long m_buffer; }; int main(int argc, char* argv[]) { boost::asio::io_service svc; Server server(svc); Client client(svc); boost::thread_group threads; for(int n = 0; n < NumThreads; ++n) threads.create_thread(std::bind(&io_service::run, &svc)); server.Run(); return 0; }

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Using boost with cray c++
by avib369 . 11 Jul '13

11 Jul '13

Does any one have any experience of using boost with cray C++ compiler ? Are any known problematic areas/issues ? Ok I know its not in the official list of supported compilers, but neither is the HPUX acc, which seems to work fine for most libs. Any help appreciated . Ta, Avi

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[Boost.Log] Some few newbee questions
by Ovanes Markarian 10 Jul '13

10 Jul '13

Hi *, Thanks for the really great logging library. Just used it a bit and was amazed how useful and easy to use it was. As I start using it more and more I have some questions... 1. In my application I would like to start with the trivial logger and extend this logger with more options, i.e. attributes etc. Currently I see the following input when doing a trace: [2013-07-03 22:17:32.462265] [0x76f73180] [trace] thread_pool: creating 1 threads[2013-07-03 22:17:32.462303] [0x76f73180] [trace] thread_pool: created thread number: 1[2013-07-03 22:17:32.462312] [0x76f73180] [trace] thread_pool: all threads started[2013-07-03 22:17:32.462320] [0x76f73180] [trace] thread_pool: constructor finished My question is what is the second attribute? Thread id? As my code runs on a 64bit machine, that does not seem to be an address... 2. Is it possible to use a scoped logging with the trivial logger? I tried to do it as described in the example but see not output. How can I produce the output from the scoped logger? 3. In my example I wrote thread_pool prefix before each log entry. Can I do it automatically? How would I go on if I only have trivial logging? May be I misunderstand some concepts, like how to use multiple loggers and connect them with each other? Any help is very appreciated. Thanks, Ovanes

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