October 2013 - Boost-users - lists.preview.boost.org

[serialization] map of shared_ptr
by Sebastian Messerschmidt 03 Oct '13

03 Oct '13

Hi folks, I stumbled over a strange behavior in the serialization. Basically I want to write multiple entries into the same archive. The data is a map of an index and some shared_ptr for the values. Writing/reading are working but produce wrong results with the provided minimal example. I'm using boost 1.49 under Visual Studio 2010 64bit. I've also tried the code without the use of shared_ptr and without a map. Both version are working fine. The combination however fails. What am I doing wrong? cheers Sebastian <snip> #include <map> #include <fstream> #include <boost/shared_ptr.hpp> #include <boost/serialization/access.hpp> #include <boost/serialization/map.hpp> #include <boost/serialization/shared_ptr.hpp> #include <boost/archive/binary_iarchive.hpp> #include <boost/archive/binary_oarchive.hpp> struct Test { template <class Archive> void serialize(Archive& ar, const unsigned int /*version*/) { ar & c; } Test() :c(0) {} int c; }; typedef std::map<int, boost::shared_ptr<Test>> TestMap; void save(const TestMap& m) { static std::ofstream os("d:/tmp/somedata.bin", std::ios_base::binary); static boost::archive::binary_oarchive oa(os); oa << m; } void load(TestMap& m) { static std::ifstream is("d:/tmp/somedata.bin", std::ios_base::binary); static boost::archive::binary_iarchive ia(is); ia >> m; } int main(int argc, char** argv) { TestMap t; t.insert(std::make_pair(1, new Test())); //save #if 1 for (unsigned int i = 0; i< 100; ++i) { t[1]->c++; save(t); std::cout << t[1]->c << std::endl; } #else //load //This fails, c will always be the first serialized value for (unsigned int i = 0; i< 100; ++i) { load(t); std::cout << t[1]->c << std::endl; } #endif } </snip>

2 2

calc2_ast.cpp
by Olivier Austina 03 Oct '13

03 Oct '13

Hi, this is a basic question (I am sorry). I am try to undestand the calc2_ast.cpp example at http://www.boost.org/doc/libs/1_41_0/libs/spirit/example/qi/calc2_ast.cpp I think the instruction expression_ast() : expr(nil()){} is an inheritance. Where can I find the definition of expr()? This is the code struct expression_ast { typedef boost::variant< nil // can't happen! , unsigned int , boost::recursive_wrapper<expression_ast> , boost::recursive_wrapper<binary_op> , boost::recursive_wrapper<unary_op> > type; * expression_ast() : expr(nil()){};* template <typename Expr> expression_ast(Expr const& expr) : expr(expr) {} expression_ast& operator+=(expression_ast const& rhs); expression_ast& operator-=(expression_ast const& rhs); expression_ast& operator*=(expression_ast const& rhs); expression_ast& operator/=(expression_ast const& rhs); type expr; }; //expression_ast bbb; struct binary_op { binary_op( char op , expression_ast const& left , expression_ast const& right) : op(op), left(left), right(right) {} char op; expression_ast left; expression_ast right; }; Thank you. Regards Olivier

2 2

[Program_Options] Why multiple_occurrences::get_option_name() and validation_error::what() disappear since 1.50 version?
by Romain LEGUAY 03 Oct '13

03 Oct '13

Hello everyone, I make a library using Boost Program Options (version 1.44). I have some "Undefined symbols" (for multiple_occurrences::get_option_name() and validation_error::what()) when I try to use my library with Boost version 1.5x. Does anyone know why those two methods disappear? Thank you! -- *Romain LEGUAY* Ingénieur Jeune Diplômé Projet Realopt A33-IMB Bureau 270 Tel: +33 5 40 00 21 35

1 0

Valgrind errors with ASIO
by Bo Jensen 03 Oct '13

03 Oct '13

Hi, I have build a job queue with a combination io_service, io_service::work, packaged_task and a thread group. I am seeing randomly either segfaults or strange asserts in pthread or even malloc, which suggest to me memory is being corrupted somehow. The problem is it does not show in debug mode running under valgrind, but if I run valgrind on the non debug version I get valgrind errors in pthreads called from asio. I try to downgrade my boost lib from 1.54 to 1.52, but still the same. I am completely stuck on this, does anyone have some hints to possible causes ? I can not show the complete source since it's not possible to isolate, but here's the types I have : std::vector<boost::shared_ptr<ExceptionTransfer> > io_error_; std::vector<boost::shared_future<BasisSelectRet> > io_future_; boost::asio::io_service io_service_threads_; boost::shared_ptr<boost::asio::io_service::work> io_work_; boost::thread_group io_threads_; I am calling it ala like this : /* Create new tasks */ basistasks_[workerid] = boost::make_shared<boost::packaged_task<BasisSelectRet> >(boost::bind(&CallBasisSelection,&worker,boost::ref(io_error_[workerid]))); /* Make threads */ io_service_threads_.post(boost::bind(&boost::packaged_task<BasisSelectRet>::operator(),basistasks_[workerid])); io_future_[workerid] = basistasks_[workerid]->get_future().share(); The called function is defined as follows (BasisSelectRet is just a enum) : /* Helper function */ BasisSelectRet CallBasisSelection(TreeWorker *worker, boost::shared_ptr<ExceptionTransfer> &error) { BasisSelectRet ret = BasisSelectRetOk; try { worker->BasisSelection(); } catch( ... ) { error->SetException(boost::current_exception()); } return ret; } I can wait for a job to finish like this : boost::wait_for_any(io_future_.begin(),io_future_.end()); Here's the val grind errors : ==3723== by 0xB5D77BF: ??? ==3723== ==3723== Thread 5: ==3723== Invalid read of size 4 ==3723== at 0x6506C01: __pthread_mutex_cond_lock (pthread_mutex_lock.c:50) ==3723== by 0x65010B2: pthread_cond_wait@@GLIBC_2.3.2 (pthread_cond_wait.S:203) ==3723== by 0x5F27B73: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x5EEAA2A: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c334 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid read of size 4 ==3723== at 0x6506C36: __pthread_mutex_cond_lock (pthread_mutex_lock.c:61) ==3723== by 0x65010B2: pthread_cond_wait@@GLIBC_2.3.2 (pthread_cond_wait.S:203) ==3723== by 0x5F27B73: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x5EEAA2A: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c328 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid read of size 4 ==3723== at 0x6506C40: __pthread_mutex_cond_lock (pthread_mutex_lock.c:62) ==3723== by 0x65010B2: pthread_cond_wait@@GLIBC_2.3.2 (pthread_cond_wait.S:203) ==3723== by 0x5F27B73: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x5EEAA2A: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c330 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid write of size 4 ==3723== at 0x6506C4C: __pthread_mutex_cond_lock (pthread_mutex_lock.c:125) ==3723== by 0x65010B2: pthread_cond_wait@@GLIBC_2.3.2 (pthread_cond_wait.S:203) ==3723== by 0x5F27B73: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x5EEAA2A: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c330 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid read of size 1 ==3723== at 0x5F27B2B: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0xDD41297: ??? ==3723== Address 0x670c360 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid read of size 4 ==3723== at 0x6500311: __pthread_mutex_unlock_usercnt (pthread_mutex_unlock.c:37) ==3723== by 0x5EEAA58: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c334 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid write of size 4 ==3723== at 0x650032F: __pthread_mutex_unlock_usercnt (pthread_mutex_unlock.c:46) ==3723== by 0x5EEAA58: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c330 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid read of size 4 ==3723== at 0x6500360: __pthread_mutex_unlock_usercnt (pthread_mutex_unlock.c:49) ==3723== by 0x5EEAA58: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c338 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid read of size 4 ==3723== at 0x6500340: __pthread_mutex_unlock_usercnt (pthread_mutex_unlock.c:52) ==3723== by 0x5EEAA58: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c328 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid write of size 4 ==3723== at 0x6503C55: __lll_unlock_wake (lowlevellock.S:374) ==3723== by 0x5EEAA58: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c328 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Syscall param futex(futex) points to unaddressable byte(s) ==3723== at 0x6503C7C: __lll_unlock_wake (lowlevellock.S:380) ==3723== by 0x5EEAA58: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0x670c328 is not stack'd, malloc'd or (recently) free'd ==3723== <Log> 20 0 20 -3.05198e+02 - - - 1127 31.18 ==3723== Thread 3: ==3723== Invalid read of size 8 ==3723== at 0x4E0ED3F: __intel_ssse3_memcpy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x7439DF7: ??? ==3723== Address 0x66f3b58 is 112 bytes inside a block of size 116 alloc'd ==3723== at 0x4024F20: malloc (vg_replace_malloc.c:236) ==3723== by 0x582A7B6: _ZN3slm6Matrix16ResizeVecsInternEiPKib. (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x7439DF7: ??? ==3723== ==3723== Invalid read of size 8 ==3723== at 0x4E0ED6F: __intel_ssse3_memcpy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x7439DF7: ??? ==3723== Address 0x66f5d48 is 136 bytes inside a block of size 140 alloc'd ==3723== at 0x4024F20: malloc (vg_replace_malloc.c:236) ==3723== by 0x582A7B6: _ZN3slm6Matrix16ResizeVecsInternEiPKib. (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x7439DF7: ??? ==3723== <Log> 20 0 20 -3.05198e+02 -2.68521e+02* 12.0 1 1139 36.72 ==3723== Thread 4: ==3723== Invalid read of size 4 ==3723== at 0x6506C01: __pthread_mutex_cond_lock (pthread_mutex_lock.c:50) ==3723== by 0x65010B2: pthread_cond_wait@@GLIBC_2.3.2 (pthread_cond_wait.S:203) ==3723== by 0x5F27B73: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x5EEA9C5: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0xb93ffac is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid read of size 4 ==3723== at 0x6506C36: __pthread_mutex_cond_lock (pthread_mutex_lock.c:61) ==3723== by 0x65010B2: pthread_cond_wait@@GLIBC_2.3.2 (pthread_cond_wait.S:203) ==3723== by 0x5F27B73: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x5EEA9C5: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0xb93ffa0 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid read of size 4 ==3723== at 0x6506C40: __pthread_mutex_cond_lock (pthread_mutex_lock.c:62) ==3723== by 0x65010B2: pthread_cond_wait@@GLIBC_2.3.2 (pthread_cond_wait.S:203) ==3723== by 0x5F27B73: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x5EEA9C5: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0xb93ffa8 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Invalid write of size 4 ==3723== at 0x6506C4C: __pthread_mutex_cond_lock (pthread_mutex_lock.c:125) ==3723== by 0x65010B2: pthread_cond_wait@@GLIBC_2.3.2 (pthread_cond_wait.S:203) ==3723== by 0x5F27B73: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x5EEA9C5: boost::asio::io_service::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0x4C160F9: boost::detail::thread_data<boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boost::asio::io_service*> > > >::run() (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x4E25DAB: thread_proxy (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulumnet20.so) ==3723== by 0x64FC96D: start_thread (pthread_create.c:300) ==3723== by 0x65DD98D: clone (clone.S:130) ==3723== Address 0xb93ffa8 is not stack'd, malloc'd or (recently) free'd ==3723== ==3723== Thread 5: ==3723== Invalid read of size 1 ==3723== at 0x5F27B2B: boost::asio::detail::task_io_service::do_run_one(boost::asio::detail::scoped_lock<boost::asio::detail::posix_mutex>&, boost::asio::detail::task_io_service::thread_info&, boost::system::error_code const&) (in /home/bj/sulum/root/src/bjam/bin/intel-linux/release/address-model-32/threading-multi/libsulum20.so) ==3723== by 0xCD40297: ??? ==3723== Address 0xb93ffd8 is not stack'd, malloc'd or (recently) free'd ==3723==

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[Spirit/qi] parsing order, exact matches
by beet 02 Oct '13

02 Oct '13

Dear Boost-User list, I have modified the calc6-example from the Spirit docs, so that it uses double variables rather than integers. I have then added a number of mathematical functions. The rule for the unary functions (reduced to just sin and sinh here for readability) is: unary_function_rule_ = (string_("sin") > '(' > expression_rule_ > ')') | (string_("sinh") > '(' > expression_rule_ > ')') ; I would have expected the "sin" part of the rule to trigger only when there is a "sin" string, which is immediately followed by a '('. This works o.k. when the function in question really contains a sin(). However, when I pass a "sinh()", I get an error message that it failed parsing a "h(", so the "sin" part of the message has triggered. Changing the order of sinh and sin in the rule cures the problem. Still I would like to understand how I can make the sin-part of the rule only trigger for expressions like "sin(3.14)", but not for e.g. "sinh(2)". Thanks and best regards, Beet

2 1

[Geometry] Triangulation?
by David Hynd 02 Oct '13

02 Oct '13

Hi, I want to use the boolean/CSG operations of the Geometry library of Boost, but I need the resultant polygons to be triangles (it's 3D data, by the way). Is there a way to achieve this with Boost? Or if not, what recommendations would you have for me? This is my first ever mailing list post, so forgive me if I didn't get it right :) Thanks, David

2 2

[Iostreams] Zlib compression sometimes creates corrupt data on OSX
by Michael Jung 02 Oct '13

02 Oct '13

Hello, I’m having the following problem with my program: If I save data on OSX using a boost::iostreams::filtering_ostream with a boost::iostreams::zlib_compressor() the resulting file is sometimes corrupted. The following example code reproduces the problem: #include <fstream> #include <iostream> #include <vector> #include <boost/iostreams/filtering_stream.hpp> #include <boost/iostreams/filter/zlib.hpp> int main(int argc, char** argv) { if (argc != 2) return 1; std::ifstream file(argv[1]); if (file) { file.seekg(0, std::ios::end); std::streampos length = file.tellg(); file.seekg(0, std::ios::beg); std::vector<char> buffer1(length); std::vector<char> buffer2(length); file.read(&buffer1[0], length); { std::ofstream ofs("test.dat", std::ios_base::binary); boost::iostreams::filtering_ostream fos; fos.push(boost::iostreams::zlib_compressor()); fos.push(ofs); fos.write(&buffer1[0], length); } { std::ifstream ifs("test.dat", std::ios_base::binary); boost::iostreams::filtering_istream fis; fis.push(boost::iostreams::zlib_decompressor()); fis.push(ifs); fis.read(&buffer2[0], length); } std::cout << (buffer1 == buffer2 ? "equal" : "not equal") << std::endl; } } This piece of code reads a file that is specified as command line argument, compresses and saves it to “test.dat”, reloads and decompresses it and then compares the result with the content of the original file. Using it with two files linked below leads to the following output: $ ./bugtest example1_working.txt equal $ ./bugtest example1_not_working.txt not equal i.e. in the second case the compression creates corrupt data. I verified that the problem is in the compression part by trying to decompress test.dat on Linux using zlib-flate which gives an error (incorrect data check). If I compress the file manually on Linux using zlib-flate and decompress it on OSX with code similar to the above, the input file is reproduced correctly. The two files used above are save files of my software. You can download them from: http://neptun.iup.uni-heidelberg.de/files/example1_working.txt http://neptun.iup.uni-heidelberg.de/files/example1_not_working.txt Another pair of files with the problem is: http://neptun.iup.uni-heidelberg.de/files/example2_working.txt http://neptun.iup.uni-heidelberg.de/files/example2_not_working.txt I haven’t been able to find out what is special about the ones causing the problem, so I just put them up as they are. The files are quite similar, but show a few differences on every (or almost every?) line. If needed, I can create other pairs of files showing the same problem. I compiled the above code in the following way: c++ -stdlib=libc++ -std=c++11 test.cpp -I /Users/michael/projects/boost-svn-build/include/ -c c++ -stdlib=libc++ -std=c++11 -o test test.o /Users/michael/projects/boost-svn-build/lib/libboost_iostreams.a -lz The boost libraries were built from svn as follows: ./bootstrap.sh --prefix=../boost-svn-build --with-libraries=iostreams --with-toolset=clang ./b2 -j6 link=static toolset=clang cxxflags="-std=c++11 -stdlib=libc++" linkflags="-stdlib=libc++" install Clang version is: “Apple LLVM version 4.2 (clang-425.0.28) (based on LLVM 3.2svn)” I am running OS X 10.8.2. The same files are compressed correctly with the above code on Linux, compiled with GCC 4.6.3. I think this problem might be a bug in boost or maybe also in the llvm libraries (c.f. https://svn.boost.org/trac/boost/ticket/8150 , which looks like a similar problem). Compiling boost with zlib 1.2.8 instead of using zlib 1.2.5, which is shipped with OSX, leads to the same problem. Both Boost 1.54.0 and the svn version are affected. Should I create a ticket for this on the bug tracker? Or is this just me using the library incorrectly?? Best regards, Michael -- Michael Jung michaeljung(a)mailhaven.com

2 1

virtual memory exhausted: cannot allocate memory
by rahul baruah 02 Oct '13

02 Oct '13

Has anyone found solution to the problem. When i include many statemachine, i get this error while compile. Urgently need help Regards Rahul

1 0

Boost.Coroutine + objects
by Van Pers 02 Oct '13

02 Oct '13

Hello guys, I am using Boost Coroutines but I would like to use them in a Objected-Oriented way. So, I tried to rewrite parallel.cpp (boost/libs/coroutine/example) using the example functions like class methods, but it did not work. This is my code, anybody can help me? My code: typedef boost::coroutines::coroutine< void() > coroutine_t; class Abc{ public: void first( coroutine_t::caller_type & self) { std::cout << "started first! "; for ( int i = 0; i < 10; ++i) { self(); std::cout << "a" << i; } } void second( coroutine_t::caller_type & self) { std::cout << "started second! "; for ( int i = 0; i < 10; ++i) { self(); std::cout << "b" << i; } } void third(){ coroutine_t c1( boost::bind( first, _1) ); coroutine_t c2( boost::bind( second, _1) ); while ( c1 && c2) { c1(); std::cout << " "; c2(); std::cout << " "; } } }; int main( int argc, char * argv[]) { Abc* myabc = new Abc(); myabc->third(); std::cout << "\nDone" << std::endl; return EXIT_SUCCESS; } Thank you, Van

2 1

returning range adaptor generator
by Nick Stokes 02 Oct '13

02 Oct '13

What should be the return type for a function that returns an adapted range? E.g. template<class Range> xxx getIndirected( const Range& r ) { return r | boost::adaptors::indirected; } The use case being, providing a API with these little useful helpers without forcing the user to know about Boost.Range at all. Like so: #include <myapi.hpp> #include <boost/foreach.hpp> LegacyPointerContainers f; // contains Foo pointers BOOST_FOREACH( Foo& f, TraverseFoo( f ) ) { } /// where in myapi.hpp xxx TraverseFoo( LegacyPointerContainers& f ) { return getIndirected( makeRange(f) ) ; } PS: This is all C++03. No autos. Thanks Nick

3 3