August 2009 - Boost-users - lists.preview.boost.org

boost 1.40 beta libs, no longer include compiler version/boost version ?
by Avi Bahra 20 Aug '09

20 Aug '09

When building boost 1.40 the libraries produced don't include compiler version or boost version any more ? i.e boost 1.38 bjam --build-dir=./tmpBuildDir toolset=gcc stage link=static --with-date_time libboost_date_time-gcc42-mt.a -> libboost_date_time-gcc42-mt-1_38.a with boost 1.40 beta bjam --build-dir=./tmpBuildDir toolset=gcc stage link=static --with-date_time libboost_date_time.a Is this expected or a bug ? Best regards, Ta, Avi

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[Help] crash in boost::asio::detail::time_queue
by zong jinliang 20 Aug '09

20 Aug '09

My code use boost::asio and log4cplus. There is any memory write error(as follow) which is detected by valgrind. And i can't fix the question. I have used log4cplus for a long time, and detect my program in valgrind in time, havn't found that there is memory error in log4cplus. This is the first time to use boost::asio. Anybody meet crash in boost::asio::detail::time_queue? ==4743== ==4743== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 18 from 1) ==4743== ==4743== 1 errors in context 1 of 2: ==4743== Invalid write of size 4 ==4743== at 0x805BD6B: boost::asio::detail::timer_queue<boost::asio::time_traits<boost::posix_time::ptime> >::remove_timer(boost::asio::detail::timer_queue<boost::asio::time_traits<boost::posix_time::ptime> >::timer_base*) (timer_queue.hpp:401) ==4743== by 0x805C1D2: boost::asio::detail::timer_queue<boost::asio::time_traits<boost::posix_time::ptime> >::dispatch_timers() (timer_queue.hpp:119) ==4743== by 0x80619C9: boost::asio::detail::epoll_reactor<false>::run(bool) (epoll_reactor.hpp:553) ==4743== by 0x8061D4F: boost::asio::detail::task_io_service<boost::asio::detail::epoll_reactor<false> >::do_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service<boost::asio::detail::epoll_reactor<false> >::idle_thread_info*, boost::system::error_code&) (task_io_service.hpp:260) ==4743== by 0x8061F49: boost::asio::detail::task_io_service<boost::asio::detail::epoll_reactor<false> >::run(boost::system::error_code&) (task_io_service.hpp:103) ==4743== by 0x8061FFD: boost::asio::io_service::run() (io_service.ipp:58) ==4743== by 0x8050392: CohService::start() (CohService.cpp:29) ==4743== by 0x8064101: boost::_mfi::mf0<void, CohService>::operator()(CohService*) const (mem_fn_template.hpp:49) ==4743== by 0x8064151: void boost::_bi::list1<boost::_bi::value<CohService*> >::operator()<boost::_mfi::mf0<void, CohService>, boost::_bi::list0>(boost::_bi::type<void>, boost::_mfi::mf0<void, CohService>&, boost::_bi::list0&, int) (bind.hpp:246) ==4743== by 0x8064194: boost::_bi::bind_t<void, boost::_mfi::mf0<void, CohService>, boost::_bi::list1<boost::_bi::value<CohService*> > >::operator()() (bind_template.hpp:20) ==4743== by 0x80641AD: boost::detail::thread_data<boost::_bi::bind_t<void, boost::_mfi::mf0<void, CohService>, boost::_bi::list1<boost::_bi::value<CohService*> > > >::run() (thread.hpp:56) ==4743== by 0x80B0F4C: thread_proxy (in /home/zjl/test/trunk/cohcommand/test) ==4743== Address 0x4f2d2f8 is 32 bytes inside a block of size 33 free'd ==4743== at 0x40052BC: operator delete(void*) (vg_replace_malloc.c:342) ==4743== by 0x57A813C: std::string::_Rep::_M_destroy(std::allocator<char> const&) (in /usr/lib/libstdc++.so.6.0.8) ==4743== by 0x57A9F64: std::string::_M_mutate(unsigned int, unsigned int, unsigned int) (in /usr/lib/libstdc++.so.6.0.8) ==4743== by 0x57A9FB9: std::string::_M_replace_safe(unsigned int, unsigned int, char const*, unsigned int) (in /usr/lib/libstdc++.so.6.0.8) ==4743== by 0x80AF5B5: std::string& std::string::_M_replace_dispatch<__gnu_cxx::__normal_iterator<char*, std::vector<char, std::allocator<char> > > >(__gnu_cxx::__normal_iterator<char*, std::string>, __gnu_cxx::__normal_iterator<char*, std::string>, __gnu_cxx::__normal_iterator<char*, std::vector<char, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char*, std::vector<char, std::allocator<char> > >, __false_type) (basic_string.tcc:643) ==4743== by 0x80AEF19: log4cplus::helpers::Time::getFormattedTime(std::string const&, bool) const (basic_string.h:1374) ==4743== by 0x80A236D: log4cplus::pattern::DatePatternConverter::convert(log4cplus::spi::InternalLoggingEvent const&) (patternlayout.cxx:385) ==4743== by 0x80A4AC7: log4cplus::pattern::PatternConverter::formatAndAppend(std::ostream&, log4cplus::spi::InternalLoggingEvent const&) (patternlayout.cxx:234) ==4743== by 0x80A4E57: log4cplus::PatternLayout::formatAndAppend(std::ostream&, log4cplus::spi::InternalLoggingEvent const&) (patternlayout.cxx:742) ==4743== by 0x8093078: log4cplus::RollingFileAppender::append(log4cplus::spi::InternalLoggingEvent const&) (fileappender.cxx:315) ==4743== by 0x8083F72: log4cplus::Appender::doAppend(log4cplus::spi::InternalLoggingEvent const&) (appender.cxx:207) ==4743== by 0x80826BD: log4cplus::helpers::AppenderAttachableImpl::appendLoopOnAppenders(log4cplus::spi::InternalLoggingEvent const&) const (appenderattachableimpl.cxx:159) ==4743== ==4743== 1 errors in context 2 of 2: ==4743== Thread 1: ==4743== Invalid write of size 4 ==4743== at 0x807CB59: bool boost::asio::detail::timer_queue<boost::asio::time_traits<boost::posix_time::ptime> >::enqueue_timer<boost::asio::detail::deadline_timer_service<boost::asio::time_traits<boost::posix_time::ptime>, boost::asio::detail::epoll_reactor<false> >::wait_handler<boost::_bi::bind_t<void, boost::_mfi::mf1<void, CohClientConn, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<CohClientConn*>, boost::arg<1> (*)()> > > >(boost::posix_time::ptime const&, boost::asio::detail::deadline_timer_service<boost::asio::time_traits<boost::posix_time::ptime>, boost::asio::detail::epoll_reactor<false> >::wait_handler<boost::_bi::bind_t<void, boost::_mfi::mf1<void, CohClientConn, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<CohClientConn*>, boost::arg<1> (*)()> > >, void*) (timer_queue.hpp:80) ==4743== by 0x807CCC6: void boost::asio::detail::epoll_reactor<false>::schedule_timer<boost::asio::time_traits<boost::posix_time::ptime>, boost::asio::detail::deadline_timer_service<boost::asio::time_traits<boost::posix_time::ptime>, boost::asio::detail::epoll_reactor<false> >::wait_handler<boost::_bi::bind_t<void, boost::_mfi::mf1<void, CohClientConn, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<CohClientConn*>, boost::arg<1> (*)()> > > >(boost::asio::detail::timer_queue<boost::asio::time_traits<boost::posix_time::ptime> >&, boost::asio::time_traits<boost::posix_time::ptime>::time_type const&, boost::asio::detail::deadline_timer_service<boost::asio::time_traits<boost::posix_time::ptime>, boost::asio::detail::epoll_reactor<false> >::wait_handler<boost::_bi::bind_t<void, boost::_mfi::mf1<void, CohClientConn, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<CohClientConn*>, boost::arg<1> (*)()> > >, void*) (epoll_reactor.hpp:414) ==4743== by 0x807CD9F: void boost::asio::detail::deadline_timer_service<boost::asio::time_traits<boost::posix_time::ptime>, boost::asio::detail::epoll_reactor<false> >::async_wait<boost::_bi::bind_t<void, boost::_mfi::mf1<void, CohClientConn, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<CohClientConn*>, boost::arg<1> (*)()> > >(boost::asio::detail::deadline_timer_service<boost::asio::time_traits<boost::posix_time::ptime>, boost::asio::detail::epoll_reactor<false> >::implementation_type&, boost::_bi::bind_t<void, boost::_mfi::mf1<void, CohClientConn, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<CohClientConn*>, boost::arg<1> (*)()> >) (deadline_timer_service.hpp:185) ==4743== by 0x807CE01: void boost::asio::deadline_timer_service<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime> >::async_wait<boost::_bi::bind_t<void, boost::_mfi::mf1<void, CohClientConn, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<CohClientConn*>, boost::arg<1> (*)()> > >(boost::asio::detail::deadline_timer_service<boost::asio::time_traits<boost::posix_time::ptime>, boost::asio::detail::epoll_reactor<false> >::implementation_type&, boost::_bi::bind_t<void, boost::_mfi::mf1<void, CohClientConn, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<CohClientConn*>, boost::arg<1> (*)()> >) (deadline_timer_service.hpp:157) ==4743== by 0x807CE35: void boost::asio::basic_deadline_timer<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime>, boost::asio::deadline_timer_service<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime> > >::async_wait<boost::_bi::bind_t<void, boost::_mfi::mf1<void, CohClientConn, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<CohClientConn*>, boost::arg<1> (*)()> > >(boost::_bi::bind_t<void, boost::_mfi::mf1<void, CohClientConn, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<CohClientConn*>, boost::arg<1> (*)()> >) (basic_deadline_timer.hpp:374) ==4743== by 0x80720B3: CohClientConn::CohClientConn(ICohCommand*, boost::asio::io_service&, std::string const&, unsigned int, std::string const&, int, int) (CohClientConn.cpp:28) ==4743== by 0x80500D2: CohService::start_conn(ICohCommand*, std::string const&, unsigned int, std::string const&) (CohService.cpp:34) ==4743== by 0x8064C3A: ICohCommand::DoRequest(std::string const&, unsigned int, std::string const&) (ICohCommand.cpp:5) ==4743== by 0x804C9C8: GetConfig::Run() (GetConfig.cpp:18) ==4743== by 0x804D0E5: ICohAgent::DoGetConfig(void*, std::string const&, std::string const&, std::string const&, std::string const&, std::string const&, std::string const&) (ICohAgent.cpp:7) ==4743== by 0x804D64D: main (test.cpp:23) ==4743== Address 0x4f2d2f8 is 32 bytes inside a block of size 33 free'd ==4743== at 0x40052BC: operator delete(void*) (vg_replace_malloc.c:342) ==4743== by 0x57A813C: std::string::_Rep::_M_destroy(std::allocator<char> const&) (in /usr/lib/libstdc++.so.6.0.8) ==4743== by 0x57A9F64: std::string::_M_mutate(unsigned int, unsigned int, unsigned int) (in /usr/lib/libstdc++.so.6.0.8) ==4743== by 0x57A9FB9: std::string::_M_replace_safe(unsigned int, unsigned int, char const*, unsigned int) (in /usr/lib/libstdc++.so.6.0.8) ==4743== by 0x80AF5B5: std::string& std::string::_M_replace_dispatch<__gnu_cxx::__normal_iterator<char*, std::vector<char, std::allocator<char> > > >(__gnu_cxx::__normal_iterator<char*, std::string>, __gnu_cxx::__normal_iterator<char*, std::string>, __gnu_cxx::__normal_iterator<char*, std::vector<char, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char*, std::vector<char, std::allocator<char> > >, __false_type) (basic_string.tcc:643) ==4743== by 0x80AEF19: log4cplus::helpers::Time::getFormattedTime(std::string const&, bool) const (basic_string.h:1374) ==4743== by 0x80A236D: log4cplus::pattern::DatePatternConverter::convert(log4cplus::spi::InternalLoggingEvent const&) (patternlayout.cxx:385) ==4743== by 0x80A4AC7: log4cplus::pattern::PatternConverter::formatAndAppend(std::ostream&, log4cplus::spi::InternalLoggingEvent const&) (patternlayout.cxx:234) ==4743== by 0x80A4E57: log4cplus::PatternLayout::formatAndAppend(std::ostream&, log4cplus::spi::InternalLoggingEvent const&) (patternlayout.cxx:742) ==4743== by 0x8093078: log4cplus::RollingFileAppender::append(log4cplus::spi::InternalLoggingEvent const&) (fileappender.cxx:315) ==4743== by 0x8083F72: log4cplus::Appender::doAppend(log4cplus::spi::InternalLoggingEvent const&) (appender.cxx:207) ==4743== by 0x80826BD: log4cplus::helpers::AppenderAttachableImpl::appendLoopOnAppenders(log4cplus::spi::InternalLoggingEvent const&) const (appenderattachableimpl.cxx:159)

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[fusion] "real" return types
by Stefan Strasser 19 Aug '09

19 Aug '09

I have a problem with boost.fusion I can't figure out from the documentation. consider the following example: template<class Vector> ? function(Vector vec){ return fusion::push_back(vec,123); } what is the return type ? the return type is supposed to be a random access sequence, so result_of::push_back<Vector,int>::type is not an option, because push_back only returns a forward sequence. so I have to construct a new vector from the view that push_back returns. if Vector was vector<char,short> I need to find the type vector<char,short,int>, preferrably without an own MPL algorithm since this is only a simple test case, the real return type is much more complex and based on more than one transformation function. thank you

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[python] raw pointer data members
by Igor Mikushkin 19 Aug '09

19 Aug '09

Hello Boosters, I'm trying to use Boost Python that way: template<class Key> struct Node { Node(Key key): key(key) {} Node* parent; Node* left; Node* right; Key key; }; ..... BOOST_PYTHON_MODULE(tree) { class_<Node>("Node", init<int>()) .def_readwrite("parent", &Node::parent) .def_readwrite("left", &Node::left) .def_readwrite("right", &Node::right) .def_readwrite("key", &Node::key); }; But then I can't use parent, left and right properties in Python code. Is there a way to convert these raw pointers to common object reference in Python? Thanks in advance, Igor

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[Pool] Thoughts about new pool class
by Roman Shmelev 19 Aug '09

19 Aug '09

Hi! I've got an idea about memory allocation situation. 1) User needs to allocate memory chunks of random length during the program run (or significant part of that run); 2) User will need to free all chunks together, not some of them. I guess, it is rather simple for programmer to write such class-allocator (I've written one). But I guess I'm not professional enough to write class that could be included to Boost. More, does anybody need one? Does anybody want to handle such task? so curious..

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Re: [Boost-users] [Proto] Building a mpl::vector from an expression
by christophe henry 19 Aug '09

19 Aug '09

Hi Eric, > You could use reverse_fold instead of reversing the whole list after the > transform. Or you could use reverse_fold_tree to get the vector and then > pop the attribute_ off the front. That's probably fastest and simplest. I must be doing something wrong (I suppose it has something to do with my second "when") because parsing: attributes_ << int() << bool() << string() With the above given grammar gives me a mpl::vector<string,bool,int>, which is normal, but if I simply and naively replace fold by reverse_fold, all I get is a mpl::vector<int>. Am I missing something obvious? Thanks, Christophe _________________________________________________________________ More than messages–check out the rest of the Windows Live™. http://www.microsoft.com/windows/windowslive/

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Re: [Boost-users] boost 1.40 beta, serialization via base pointer crashes
by Avi Bahra 19 Aug '09

19 Aug '09

> Is the "latest AIX v10.1 compiler" the same as the IBM VaCPP used in the trunk tests? These > tests show that compiler failing a number of tests which use export. This has been traced >to the compiler optimizing out code not explicitly referred to. > >Robert Ramey I am not familiar with the trunk tests. However XL 10.1.0.3 AIX is the latest C++ compiler. This use vacpp as the bjam toolset argument. But internally I gather it uses xlC. When I ran the sample in the Totalview(debugger) it shows the following. Can't read type info for "basic_pointer_oserializer": Expecting mangled name, and didn't find one. Can't read type info for "basic_pointer_iserializer": Expecting mangled name, and didn't find one. Can't read type info for "singleton<boost__archive__detail__<unnamed>__guid_initializer<RepeatBase> >": Expecting ":", and didn't find one. Can't read type info for "singleton<boost__archive__detail__<unnamed>__guid_initializer<RepeatDerived> >": Expecting ":", and didn't find one. Can't read type info for "singleton_wrapper<boost__archive__detail__<unnamed>__guid_initializer<RepeatBase> >": Expecting ":", and didn't find one. Can't read type info for "singleton_wrapper<boost__archive__detail__<unnamed>__guid_initializer<RepeatDerived> >": Expecting ":", and didn't find one. Can't read type info for "error_info_container": Expecting mangled name, and didn't find one. Can't read type info for "init_guid<RepeatBase>": Expecting ":", and didn't find one. Can't read type info for "init_guid<RepeatDerived>": Expecting ":", and didn't find one. >From your reply your saying that this is a compiler bug Do you know if any defect report has been raised ? Is there any workaround that stops the compiler doing these optimisation. If not is there possibility of changing the serialization code ? Best regards, Ta, Avi

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Compiling errors
by Leandro Santos de Lima 19 Aug '09

19 Aug '09

Hi, I'm trying to compile my program code using boost phoenix but I'm receiving this error messages: \boost/spirit/home/classic/utility/grammar_def.hpp(107) : error C2039: > 'nil_t' : is not a member of 'boost::phoenix' \boost/spirit/home/classic/utility/grammar_def.hpp(110) : error C2039: > 'nil_t' : is not a member of 'boost::phoenix' \boost/spirit/home/classic/utility/grammar_def.hpp(180) : error C2143: > syntax error : missing ';' before '<' I guess this errors are caused by some wrong define or include but I don't know how to fix it. Thanks, Leandro Lima

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[boost-users][conversion] 1.34.1 upgrade to 1.39 lexical_cast
by Ryan McConnehey 19 Aug '09

19 Aug '09

I have code that converts, using lexical_cast, some numeric values to strings. When upgrading from boost 1.34.1 to 1.39 some of my float and double test values changed. For example the numeric value 1111.11 converts to the string value "1111.11" in boost 1.34.1. In boost 1.39 the numeric value 1111.11 converts to the string value "1111.1099999999999". I find it odd that some values give this long string representation but other values convert exactly (1222.22 for example). Can someone tell me what changed from 1.34.1 to 1.39. I'm pretty sure it has to be the underling code in boost since I used Microsoft Visual Studio 2005 IDE for building my project with both boost versions. The code I'm using is as follows: template <typename T> std::string convertValueToText(T const& value) const { return boost::lexical_cast<std::string>( value ); } Ryan

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Re: [Boost-users] [Proto] Building a mpl::vector from an expression
by christophe henry 19 Aug '09

19 Aug '09

"Eric Niebler" schrieb im Newsbeitrag news:<4A8BB56F.7050706(a)boostpro.com>... > Steven Watanabe wrote: > > christophe henry wrote: > >> I am trying to build a mpl::vector from an expression like > >> > >> (string(),ClassA(),ClassB()) > >> > >> To get a mpl::vector > >> > >> > >> Is there a way to do this or I should give up the idea? > > > > Does fold_tree help? > > It does. > *snip* Ah It see. Thanks a lot, I think I got the idea. I just have a concern with: template<class T> struct is_my : mpl::false_ {}; template<> struct is_my<std::string> : mpl::true_ {}; template<> struct is_my<ClassA> : mpl::true_ {}; template<> struct is_my<ClassB> : mpl::true_ {}; As it forces extra declarations which not everybody is willing to make. But based on the same fold idea I can allow something like: attributes_ << int() << std::map<int,int>() << bool() Where attributes_ is made a proto terminal<my_tag> with proto::extends and the following grammar (which I shamelessly stole from the doc): struct BuildAttributes : proto::or_< // Don't add the flag terminal to the list proto::when< proto::terminal< my_tag > , proto::_state > // Put all other terminals at the head of the // list that we're building in the "state" parameter , proto::when< proto::terminal<proto::_> , fusion::cons<proto::_value, proto::_state>(proto::_value, proto::_state) > // For left-shift operations, first fold the right // child to a list using the current state. Use // the result as the state parameter when folding // the left child to a list. , proto::when< proto::shift_left<BuildAttributes, BuildAttributes> , proto::fold< proto::_ , fusion::nil() , BuildAttributes>() > > {}; I then just have to invert the order again as it gets reversed (ok a few seconds more to compile...): boost::mpl::copy<typename boost::result_of<BuildAttributes(Attr)>::type,boost::mpl::front_inserter<boost::mpl::vector<> > >::type Correct? Thanks a lot, Christophe _________________________________________________________________ Drag n’ drop—Get easy photo sharing with Windows Live™ Photos. http://www.microsoft.com/windows/windowslive/products/photos.aspx

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