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

[variant] Efficiency
by Olivier Tournaire 17 Jun '09

17 Jun '09

Hi all, I need to store in a class an object which type is within a predefined set. As I would like to avoid the overhead of virtual functions, I am wondering if variant could help me. Moreover, I would like to know what is the runtime cost of using such a type (instead of base class pointers), and the cost of the apply_visitor. Hope you could help. Regards, Olivier

5 6

Problem with Serialization in Boost 1.37
by Christoph Mayer 08 Jun '09

08 Jun '09

Hi, when using Boost v1.37 I get a problem with the serialization library that did not appear before. The following linker error occurs: > undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' The error does not appear when I omit the class registration using BOOST_CLASS_EXPORT_GUID. As far as I understand the error, the linker can't find the d'tor for the singleton where the classes get registered. Below you can find the complete linker output. Any help is appreciated, Chris libtool: link: g++ -g -O2 -rdynamic -o distack distack-Distack.o base/Timer.o base/SubnetCounterTree.o base/GenericRoutingTable.o messages/MessageAddressDistribution.o -lboost_thread-gcc43-mt -lboost_serialization-gcc43-mt -lboost_signals-gcc43-mt -lboost_system-gcc43-mt -L/simfs/users/gamer/distack_sabine/libs/lib base/libbase.a messages/libmessage.a /usr/lib/libltdl.so -ldl -lxerces-c -lpcap -lpthread base/libbase.a(RemoteMessagingSystem.o): In function `boost::serialization::detail::singleton_wrapper<boost::archive::detail::poi nter_oserializer<boost::archive::detail::polymorphic_oarchive_route<boost::a rchive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageTimer> >::~singleton_wrapper()': RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization6detail17singleton_ wrapperINS_7archive6detail19pointer_oserializerINS4_26polymorphic_oarchive_r outeINS3_20binary_oarchive_implINS3_15binary_oarchiveEcSt11char_traitsIcEEEE E12MessageTimerEEED0Ev[boost::serialization::detail::singleton_wrapper<boost ::archive::detail::pointer_oserializer<boost::archive::detail::polymorphic_o archive_route<boost::archive::binary_oarchive_impl<boost::archive::binary_oa rchive, char, std::char_traits<char> > >, MessageTimer> > >::~singleton_wrapper()]+0x1d): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::serialization::detail::singleton_wrapper<boost::archive::detail::poi nter_oserializer<boost::archive::detail::polymorphic_oarchive_route<boost::a rchive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageTimer> >::~singleton_wrapper()': RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization6detail17singleton_ wrapperINS_7archive6detail19pointer_oserializerINS4_26polymorphic_oarchive_r outeINS3_20binary_oarchive_implINS3_15binary_oarchiveEcSt11char_traitsIcEEEE E12MessageTimerEEED1Ev[boost::serialization::detail::singleton_wrapper<boost ::archive::detail::pointer_oserializer<boost::archive::detail::polymorphic_o archive_route<boost::archive::binary_oarchive_impl<boost::archive::binary_oa rchive, char, std::char_traits<char> > >, MessageTimer> > >::~singleton_wrapper()]+0x19): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::archive::detail::pointer_oserializer<boost::archive::detail::polymor phic_oarchive_route<boost::archive::binary_oarchive_impl<boost::archive::bin ary_oarchive, char, std::char_traits<char> > >, MessageTimer>::~pointer_oserializer()': RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE12MessageTimerED0Ev[boost::archive::detail:: pointer_oserializer<boost::archive::detail::polymorphic_oarchive_route<boost ::archive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageTimer>::~pointer_oserializer()]+0x13): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::archive::detail::pointer_oserializer<boost::archive::detail::polymor phic_oarchive_route<boost::archive::binary_oarchive_impl<boost::archive::bin ary_oarchive, char, std::char_traits<char> > >, MessageTimer>::~pointer_oserializer()': RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE12MessageTimerED1Ev[boost::archive::detail:: pointer_oserializer<boost::archive::detail::polymorphic_oarchive_route<boost ::archive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageTimer>::~pointer_oserializer()]+0xf): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::serialization::detail::singleton_wrapper<boost::archive::detail::poi nter_oserializer<boost::archive::detail::polymorphic_oarchive_route<boost::a rchive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageAggregateIntervalValues> > >::~singleton_wrapper()': RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization6detail17singleton_ wrapperINS_7archive6detail19pointer_oserializerINS4_26polymorphic_oarchive_r outeINS3_20binary_oarchive_implINS3_15binary_oarchiveEcSt11char_traitsIcEEEE E30MessageAggregateIntervalValuesEEED0Ev[boost::serialization::detail::singl eton_wrapper<boost::archive::detail::pointer_oserializer<boost::archive::det ail::polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost:: archive::binary_oarchive, char, std::char_traits<char> > >, MessageAggregateIntervalValues> >::~singleton_wrapper()]+0x1d): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' base/libbase.a(RemoteMessagingSystem.o):RemoteMessagingSystem.cpp:(.text._ZN 5boost13serialization6detail17singleton_wrapperINS_7archive6detail19pointer_ oserializerINS4_26polymorphic_oarchive_routeINS3_20binary_oarchive_implINS3_ 15binary_oarchiveEcSt11char_traitsIcEEEEE30MessageAggregateIntervalValuesEEE D1Ev[boost::serialization::detail::singleton_wrapper<boost::archive::detail: :pointer_oserializer<boost::archive::detail::polymorphic_oarchive_route<boos t::archive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageAggregateIntervalValues> > >::~singleton_wrapper()]+0x19): more undefined references to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' follow base/libbase.a(RemoteMessagingSystem.o): In function `boost::serialization::detail::singleton_wrapper<boost::archive::detail::poi nter_iserializer<boost::archive::polymorphic_binary_iarchive, MessageTimer> > >::~singleton_wrapper()': RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization6detail17singleton_ wrapperINS_7archive6detail19pointer_iserializerINS3_27polymorphic_binary_iar chiveE12MessageTimerEEED0Ev[boost::serialization::detail::singleton_wrapper< boost::archive::detail::pointer_iserializer<boost::archive::polymorphic_bina ry_iarchive, MessageTimer> >::~singleton_wrapper()]+0x1d): undefined reference to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::~archive_pointer_iserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::serialization::detail::singleton_wrapper<boost::archive::detail::poi nter_iserializer<boost::archive::polymorphic_binary_iarchive, MessageTimer> > >::~singleton_wrapper()': RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization6detail17singleton_ wrapperINS_7archive6detail19pointer_iserializerINS3_27polymorphic_binary_iar chiveE12MessageTimerEEED1Ev[boost::serialization::detail::singleton_wrapper< boost::archive::detail::pointer_iserializer<boost::archive::polymorphic_bina ry_iarchive, MessageTimer> >::~singleton_wrapper()]+0x19): undefined reference to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::~archive_pointer_iserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::archive::detail::pointer_iserializer<boost::archive::polymorphic_bin ary_iarchive, MessageTimer>::~pointer_iserializer()': RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_iserializ erINS0_27polymorphic_binary_iarchiveE12MessageTimerED0Ev[boost::archive::det ail::pointer_iserializer<boost::archive::polymorphic_binary_iarchive, MessageTimer>::~pointer_iserializer()]+0x13): undefined reference to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::~archive_pointer_iserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::archive::detail::pointer_iserializer<boost::archive::polymorphic_bin ary_iarchive, MessageTimer>::~pointer_iserializer()': RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_iserializ erINS0_27polymorphic_binary_iarchiveE12MessageTimerED1Ev[boost::archive::det ail::pointer_iserializer<boost::archive::polymorphic_binary_iarchive, MessageTimer>::~pointer_iserializer()]+0xf): undefined reference to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::~archive_pointer_iserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::serialization::detail::singleton_wrapper<boost::archive::detail::poi nter_iserializer<boost::archive::polymorphic_binary_iarchive, MessageAggregateIntervalValues> >::~singleton_wrapper()': RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization6detail17singleton_ wrapperINS_7archive6detail19pointer_iserializerINS3_27polymorphic_binary_iar chiveE30MessageAggregateIntervalValuesEEED0Ev[boost::serialization::detail:: singleton_wrapper<boost::archive::detail::pointer_iserializer<boost::archive ::polymorphic_binary_iarchive, MessageAggregateIntervalValues> > >::~singleton_wrapper()]+0x1d): undefined reference to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::~archive_pointer_iserializer()' base/libbase.a(RemoteMessagingSystem.o):RemoteMessagingSystem.cpp:(.text._ZN 5boost13serialization6detail17singleton_wrapperINS_7archive6detail19pointer_ iserializerINS3_27polymorphic_binary_iarchiveE30MessageAggregateIntervalValu esEEED1Ev[boost::serialization::detail::singleton_wrapper<boost::archive::de tail::pointer_iserializer<boost::archive::polymorphic_binary_iarchive, MessageAggregateIntervalValues> >::~singleton_wrapper()]+0x19): more undefined references to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::~archive_pointer_iserializer()' follow base/libbase.a(RemoteMessagingSystem.o): In function `boost::archive::detail::pointer_oserializer<boost::archive::detail::polymor phic_oarchive_route<boost::archive::binary_oarchive_impl<boost::archive::bin ary_oarchive, char, std::char_traits<char> > >, MessageAggregateWatchValues>::pointer_oserializer()': RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE27MessageAggregateWatchValuesEC2Ev[boost::ar chive::detail::pointer_oserializer<boost::archive::detail::polymorphic_oarch ive_route<boost::archive::binary_oarchive_impl<boost::archive::binary_oarchi ve, char, std::char_traits<char> > >, MessageAggregateWatchValues>::pointer_oserializer()]+0x1d): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::archive_pointer_oserializer(boost::serialization::extended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE27MessageAggregateWatchValuesEC2Ev[boost::ar chive::detail::pointer_oserializer<boost::archive::detail::polymorphic_oarch ive_route<boost::archive::binary_oarchive_impl<boost::archive::binary_oarchi ve, char, std::char_traits<char> > >, MessageAggregateWatchValues>::pointer_oserializer()]+0x7a): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::archive::detail::pointer_oserializer<boost::archive::detail::polymor phic_oarchive_route<boost::archive::binary_oarchive_impl<boost::archive::bin ary_oarchive, char, std::char_traits<char> > >, MessageLastSuspiciousAggregate>::pointer_oserializer()': RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE30MessageLastSuspiciousAggregateEC1Ev[boost: :archive::detail::pointer_oserializer<boost::archive::detail::polymorphic_oa rchive_route<boost::archive::binary_oarchive_impl<boost::archive::binary_oar chive, char, std::char_traits<char> > >, MessageLastSuspiciousAggregate>::pointer_oserializer()]+0x1d): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::archive_pointer_oserializer(boost::serialization::extended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE30MessageLastSuspiciousAggregateEC1Ev[boost: :archive::detail::pointer_oserializer<boost::archive::detail::polymorphic_oa rchive_route<boost::archive::binary_oarchive_impl<boost::archive::binary_oar chive, char, std::char_traits<char> > >, MessageLastSuspiciousAggregate>::pointer_oserializer()]+0x7a): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::archive::detail::pointer_oserializer<boost::archive::detail::polymor phic_oarchive_route<boost::archive::binary_oarchive_impl<boost::archive::bin ary_oarchive, char, std::char_traits<char> > >, MessageTimer>::pointer_oserializer()': RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE12MessageTimerEC1Ev[boost::archive::detail:: pointer_oserializer<boost::archive::detail::polymorphic_oarchive_route<boost ::archive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageTimer>::pointer_oserializer()]+0x1d): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::archive_pointer_oserializer(boost::serialization::extended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE12MessageTimerEC1Ev[boost::archive::detail:: pointer_oserializer<boost::archive::detail::polymorphic_oarchive_route<boost ::archive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageTimer>::pointer_oserializer()]+0x7a): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::archive::detail::pointer_oserializer<boost::archive::detail::polymor phic_oarchive_route<boost::archive::binary_oarchive_impl<boost::archive::bin ary_oarchive, char, std::char_traits<char> > >, MessageAggregateIntervalValues>::pointer_oserializer()': RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE30MessageAggregateIntervalValuesEC2Ev[boost: :archive::detail::pointer_oserializer<boost::archive::detail::polymorphic_oa rchive_route<boost::archive::binary_oarchive_impl<boost::archive::binary_oar chive, char, std::char_traits<char> > >, MessageAggregateIntervalValues>::pointer_oserializer()]+0x1d): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::archive_pointer_oserializer(boost::serialization::extended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE30MessageAggregateIntervalValuesEC2Ev[boost: :archive::detail::pointer_oserializer<boost::archive::detail::polymorphic_oa rchive_route<boost::archive::binary_oarchive_impl<boost::archive::binary_oar chive, char, std::char_traits<char> > >, MessageAggregateIntervalValues>::pointer_oserializer()]+0x7a): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::archive::detail::pointer_oserializer<boost::archive::detail::polymor phic_oarchive_route<boost::archive::binary_oarchive_impl<boost::archive::bin ary_oarchive, char, std::char_traits<char> > >, MessageAlert>::pointer_oserializer()': RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE12MessageAlertEC2Ev[boost::archive::detail:: pointer_oserializer<boost::archive::detail::polymorphic_oarchive_route<boost ::archive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageAlert>::pointer_oserializer()]+0x1d): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::archive_pointer_oserializer(boost::serialization::extended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE12MessageAlertEC2Ev[boost::archive::detail:: pointer_oserializer<boost::archive::detail::polymorphic_oarchive_route<boost ::archive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageAlert>::pointer_oserializer()]+0x7a): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::archive::detail::pointer_oserializer<boost::archive::detail::polymor phic_oarchive_route<boost::archive::binary_oarchive_impl<boost::archive::bin ary_oarchive, char, std::char_traits<char> > >, MessageLastAnomalyType>::pointer_oserializer()': RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE22MessageLastAnomalyTypeEC1Ev[boost::archive ::detail::pointer_oserializer<boost::archive::detail::polymorphic_oarchive_r oute<boost::archive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageLastAnomalyType>::pointer_oserializer()]+0x1d): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::archive_pointer_oserializer(boost::serialization::extended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE22MessageLastAnomalyTypeEC1Ev[boost::archive ::detail::pointer_oserializer<boost::archive::detail::polymorphic_oarchive_r oute<boost::archive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageLastAnomalyType>::pointer_oserializer()]+0x7a): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::serialization::singleton<boost::archive::detail::pointer_iserializer <boost::archive::polymorphic_binary_iarchive, MessageAggregateWatchValues> > >::get_instance()': RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization9singletonINS_7arch ive6detail19pointer_iserializerINS2_27polymorphic_binary_iarchiveE27MessageA ggregateWatchValuesEEE12get_instanceEv[boost::serialization::singleton<boost ::archive::detail::pointer_iserializer<boost::archive::polymorphic_binary_ia rchive, MessageAggregateWatchValues> >::get_instance()]+0x6f): undefined reference to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::archive_pointer_iserializer(boost::serialization::ext ended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization9singletonINS_7arch ive6detail19pointer_iserializerINS2_27polymorphic_binary_iarchiveE27MessageA ggregateWatchValuesEEE12get_instanceEv[boost::serialization::singleton<boost ::archive::detail::pointer_iserializer<boost::archive::polymorphic_binary_ia rchive, MessageAggregateWatchValues> >::get_instance()]+0xe3): undefined reference to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::~archive_pointer_iserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::serialization::singleton<boost::archive::detail::pointer_iserializer <boost::archive::polymorphic_binary_iarchive, MessageTimer> > >::get_instance()': RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization9singletonINS_7arch ive6detail19pointer_iserializerINS2_27polymorphic_binary_iarchiveE12MessageT imerEEE12get_instanceEv[boost::serialization::singleton<boost::archive::deta il::pointer_iserializer<boost::archive::polymorphic_binary_iarchive, MessageTimer> >::get_instance()]+0x6f): undefined reference to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::archive_pointer_iserializer(boost::serialization::ext ended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization9singletonINS_7arch ive6detail19pointer_iserializerINS2_27polymorphic_binary_iarchiveE12MessageT imerEEE12get_instanceEv[boost::serialization::singleton<boost::archive::deta il::pointer_iserializer<boost::archive::polymorphic_binary_iarchive, MessageTimer> >::get_instance()]+0xe3): undefined reference to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::~archive_pointer_iserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::serialization::singleton<boost::archive::detail::pointer_iserializer <boost::archive::polymorphic_binary_iarchive, MessageAlert> > >::get_instance()': RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization9singletonINS_7arch ive6detail19pointer_iserializerINS2_27polymorphic_binary_iarchiveE12MessageA lertEEE12get_instanceEv[boost::serialization::singleton<boost::archive::deta il::pointer_iserializer<boost::archive::polymorphic_binary_iarchive, MessageAlert> >::get_instance()]+0x6f): undefined reference to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::archive_pointer_iserializer(boost::serialization::ext ended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization9singletonINS_7arch ive6detail19pointer_iserializerINS2_27polymorphic_binary_iarchiveE12MessageA lertEEE12get_instanceEv[boost::serialization::singleton<boost::archive::deta il::pointer_iserializer<boost::archive::polymorphic_binary_iarchive, MessageAlert> >::get_instance()]+0xe3): undefined reference to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::~archive_pointer_iserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::serialization::singleton<boost::archive::detail::pointer_iserializer <boost::archive::polymorphic_binary_iarchive, MessageLastAnomalyType> > >::get_instance()': RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization9singletonINS_7arch ive6detail19pointer_iserializerINS2_27polymorphic_binary_iarchiveE22MessageL astAnomalyTypeEEE12get_instanceEv[boost::serialization::singleton<boost::arc hive::detail::pointer_iserializer<boost::archive::polymorphic_binary_iarchiv e, MessageLastAnomalyType> >::get_instance()]+0x6f): undefined reference to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::archive_pointer_iserializer(boost::serialization::ext ended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization9singletonINS_7arch ive6detail19pointer_iserializerINS2_27polymorphic_binary_iarchiveE22MessageL astAnomalyTypeEEE12get_instanceEv[boost::serialization::singleton<boost::arc hive::detail::pointer_iserializer<boost::archive::polymorphic_binary_iarchiv e, MessageLastAnomalyType> >::get_instance()]+0xe3): undefined reference to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::~archive_pointer_iserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::serialization::singleton<boost::archive::detail::pointer_iserializer <boost::archive::polymorphic_binary_iarchive, MessageLastSuspiciousAggregate> >::get_instance()': RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization9singletonINS_7arch ive6detail19pointer_iserializerINS2_27polymorphic_binary_iarchiveE30MessageL astSuspiciousAggregateEEE12get_instanceEv[boost::serialization::singleton<bo ost::archive::detail::pointer_iserializer<boost::archive::polymorphic_binary _iarchive, MessageLastSuspiciousAggregate> >::get_instance()]+0x6f): undefined reference to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::archive_pointer_iserializer(boost::serialization::ext ended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization9singletonINS_7arch ive6detail19pointer_iserializerINS2_27polymorphic_binary_iarchiveE30MessageL astSuspiciousAggregateEEE12get_instanceEv[boost::serialization::singleton<bo ost::archive::detail::pointer_iserializer<boost::archive::polymorphic_binary _iarchive, MessageLastSuspiciousAggregate> >::get_instance()]+0xe3): undefined reference to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::~archive_pointer_iserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::serialization::singleton<boost::archive::detail::pointer_iserializer <boost::archive::polymorphic_binary_iarchive, MessageAggregateIntervalValues> >::get_instance()': RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization9singletonINS_7arch ive6detail19pointer_iserializerINS2_27polymorphic_binary_iarchiveE30MessageA ggregateIntervalValuesEEE12get_instanceEv[boost::serialization::singleton<bo ost::archive::detail::pointer_iserializer<boost::archive::polymorphic_binary _iarchive, MessageAggregateIntervalValues> >::get_instance()]+0x6f): undefined reference to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::archive_pointer_iserializer(boost::serialization::ext ended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost13serialization9singletonINS_7arch ive6detail19pointer_iserializerINS2_27polymorphic_binary_iarchiveE30MessageA ggregateIntervalValuesEEE12get_instanceEv[boost::serialization::singleton<bo ost::archive::detail::pointer_iserializer<boost::archive::polymorphic_binary _iarchive, MessageAggregateIntervalValues> >::get_instance()]+0xe3): undefined reference to `boost::archive::detail::archive_pointer_iserializer<boost::archive::polymor phic_binary_iarchive>::~archive_pointer_iserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::archive::detail::pointer_oserializer<boost::archive::detail::polymor phic_oarchive_route<boost::archive::binary_oarchive_impl<boost::archive::bin ary_oarchive, char, std::char_traits<char> > >, MessageLastSuspiciousAggregate>::pointer_oserializer()': RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE30MessageLastSuspiciousAggregateEC2Ev[boost: :archive::detail::pointer_oserializer<boost::archive::detail::polymorphic_oa rchive_route<boost::archive::binary_oarchive_impl<boost::archive::binary_oar chive, char, std::char_traits<char> > >, MessageLastSuspiciousAggregate>::pointer_oserializer()]+0x22): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::archive_pointer_oserializer(boost::serialization::extended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE30MessageLastSuspiciousAggregateEC2Ev[boost: :archive::detail::pointer_oserializer<boost::archive::detail::polymorphic_oa rchive_route<boost::archive::binary_oarchive_impl<boost::archive::binary_oar chive, char, std::char_traits<char> > >, MessageLastSuspiciousAggregate>::pointer_oserializer()]+0x11e): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::archive::detail::pointer_oserializer<boost::archive::detail::polymor phic_oarchive_route<boost::archive::binary_oarchive_impl<boost::archive::bin ary_oarchive, char, std::char_traits<char> > >, MessageAggregateWatchValues>::pointer_oserializer()': RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE27MessageAggregateWatchValuesEC1Ev[boost::ar chive::detail::pointer_oserializer<boost::archive::detail::polymorphic_oarch ive_route<boost::archive::binary_oarchive_impl<boost::archive::binary_oarchi ve, char, std::char_traits<char> > >, MessageAggregateWatchValues>::pointer_oserializer()]+0x22): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::archive_pointer_oserializer(boost::serialization::extended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE27MessageAggregateWatchValuesEC1Ev[boost::ar chive::detail::pointer_oserializer<boost::archive::detail::polymorphic_oarch ive_route<boost::archive::binary_oarchive_impl<boost::archive::binary_oarchi ve, char, std::char_traits<char> > >, MessageAggregateWatchValues>::pointer_oserializer()]+0x11e): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::archive::detail::pointer_oserializer<boost::archive::detail::polymor phic_oarchive_route<boost::archive::binary_oarchive_impl<boost::archive::bin ary_oarchive, char, std::char_traits<char> > >, MessageAlert>::pointer_oserializer()': RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE12MessageAlertEC1Ev[boost::archive::detail:: pointer_oserializer<boost::archive::detail::polymorphic_oarchive_route<boost ::archive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageAlert>::pointer_oserializer()]+0x22): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::archive_pointer_oserializer(boost::serialization::extended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE12MessageAlertEC1Ev[boost::archive::detail:: pointer_oserializer<boost::archive::detail::polymorphic_oarchive_route<boost ::archive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageAlert>::pointer_oserializer()]+0x11e): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::archive::detail::pointer_oserializer<boost::archive::detail::polymor phic_oarchive_route<boost::archive::binary_oarchive_impl<boost::archive::bin ary_oarchive, char, std::char_traits<char> > >, MessageTimer>::pointer_oserializer()': RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE12MessageTimerEC2Ev[boost::archive::detail:: pointer_oserializer<boost::archive::detail::polymorphic_oarchive_route<boost ::archive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageTimer>::pointer_oserializer()]+0x22): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::archive_pointer_oserializer(boost::serialization::extended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE12MessageTimerEC2Ev[boost::archive::detail:: pointer_oserializer<boost::archive::detail::polymorphic_oarchive_route<boost ::archive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageTimer>::pointer_oserializer()]+0x11e): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::archive::detail::pointer_oserializer<boost::archive::detail::polymor phic_oarchive_route<boost::archive::binary_oarchive_impl<boost::archive::bin ary_oarchive, char, std::char_traits<char> > >, MessageAggregateIntervalValues>::pointer_oserializer()': RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE30MessageAggregateIntervalValuesEC1Ev[boost: :archive::detail::pointer_oserializer<boost::archive::detail::polymorphic_oa rchive_route<boost::archive::binary_oarchive_impl<boost::archive::binary_oar chive, char, std::char_traits<char> > >, MessageAggregateIntervalValues>::pointer_oserializer()]+0x22): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::archive_pointer_oserializer(boost::serialization::extended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE30MessageAggregateIntervalValuesEC1Ev[boost: :archive::detail::pointer_oserializer<boost::archive::detail::polymorphic_oa rchive_route<boost::archive::binary_oarchive_impl<boost::archive::binary_oar chive, char, std::char_traits<char> > >, MessageAggregateIntervalValues>::pointer_oserializer()]+0x11e): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' base/libbase.a(RemoteMessagingSystem.o): In function `boost::archive::detail::pointer_oserializer<boost::archive::detail::polymor phic_oarchive_route<boost::archive::binary_oarchive_impl<boost::archive::bin ary_oarchive, char, std::char_traits<char> > >, MessageLastAnomalyType>::pointer_oserializer()': RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE22MessageLastAnomalyTypeEC2Ev[boost::archive ::detail::pointer_oserializer<boost::archive::detail::polymorphic_oarchive_r oute<boost::archive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageLastAnomalyType>::pointer_oserializer()]+0x22): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::archive_pointer_oserializer(boost::serialization::extended_type_info const&)' RemoteMessagingSystem.cpp:(.text._ZN5boost7archive6detail19pointer_oserializ erINS1_26polymorphic_oarchive_routeINS0_20binary_oarchive_implINS0_15binary_ oarchiveEcSt11char_traitsIcEEEEE22MessageLastAnomalyTypeEC2Ev[boost::archive ::detail::pointer_oserializer<boost::archive::detail::polymorphic_oarchive_r oute<boost::archive::binary_oarchive_impl<boost::archive::binary_oarchive, char, std::char_traits<char> > >, MessageLastAnomalyType>::pointer_oserializer()]+0x11e): undefined reference to `boost::archive::detail::archive_pointer_oserializer<boost::archive::detail: :polymorphic_oarchive_route<boost::archive::binary_oarchive_impl<boost::arch ive::binary_oarchive, char, std::char_traits<char> > > > >::~archive_pointer_oserializer()' collect2: ld returned 1 exit status make[2]: *** [distack] Fehler 1 make[2]: Verlasse Verzeichnis '/simfs/users/gamer/distack_sabine/src' make[1]: *** [all-recursive] Fehler 1 make[1]: Verlasse Verzeichnis '/simfs/users/gamer/distack_sabine/src' make: *** [all-recursive] Fehler 1

4 20

Boost.Process article: Tutorial and request for comments
by Boris Schaeling 01 Jun '09

01 Jun '09

I've written an article about Boost.Process: http://www.highscore.de/cpp/process/ I've also fixed a few bugs in Boost.Process (which is now 0.31): http://www.highscore.de/boost/process.zip And the latest source code can also be found in the sandbox: https://svn.boost.org/svn/boost/sandbox/process/ For developers not familar with Boost.Process the article is a tutorial to get more easily started. For developers familiar with Boost.Process it is a request for comments. I've been looking at the big picture finally trying to find out where and how Boost.Process should be changed and in which direction it should move to become a complete library one day. As not everyone will read the entire article here are my thoughts: 1) Boost.Process is based on a few concepts like 'process' and 'context'. While those make sense there are other concepts where I wonder if they should be dropped: * 'executable' is the executable name which in practice must be a std::string. I think the original idea was to support numerous string types. This leads to the question how to support different Unicode encodings which I think is still unanswered in the Boost community. Other libraries, eg. Boost.Interprocess, simply stick to one string type (typically std::string). * 'handle' is the underlying native file handle of a stream (file descriptor on POSIX systems, handle on Windows). The concept is based on a class in the detail namespace of Boost.Process. There is just one class and it's not meant to be used by users of the library either. Thus I'm not sure what's the benefit of having an explicit 'handle' concept at all. 2) Environment variables must be sorted on Windows but not on POSIX systems. On Windows the type environment could be a typedef for std::map and on POSIX systems for std::unordered_map. Currently it's always a typedef for std::map. Is that ok? Should it be changed? Should a macro be provided in case developers want to use different typedefs? 3) Currently Boost.Process is really only useful for creating child processes. It's not possible for example to detect and iterate over other processes on a system. I guess Boost.Process should be enhanced here. Then one day the well-known utility 'ps' on POSIX systems could be implemented in Boost C++. Any comments? 4) When a process is created the standard streams (stdin, stdout and stderr) are closed by default. Is this a good choice? If it isn't what should happen otherwise? Inherting standard streams (which is the default behavior with fork on POSIX systems)? 5) Boost.Process requires to specify an absolute path to an executable which should be started. There is a helper function which returns the absolute path for an executable name (it uses the environment variable PATH). The question is if this should be done automatically if no absolute path is given? 6) When a stream of a child process is captured Boost.Process automatically creates a pipe. As pipes don't support asynchronous operations on Windows a named pipe is required (called FIFO on POSIX systems). Currently a macro must be defined to make Boost.Process use a named pipe on Windows. It might make more sense to enable developers to choose either a pipe or a FIFO explicitly - not only on Windows but on all platforms. Any comments? 7) It's possible to capture and access streams of a child process. Those streams are derived from std::istream and std::ostream and thus only support blocking I/O operations. Currently the underlying handle has to be fetched to initialize a generic I/O object from Boost.Asio to use asynchronous I/O operations. How should the library be changed to make it easier to use asynchronous I/O? 8) There is a method wait() which makes it possible to wait for another process to exit. Currently wait() is provided by the class child though. Shouldn't it really be defined by the class process (so you can wait not only for child processes to exit)? 9) As wait() blocks an asynchronous alternative should be provided. 10) The Windows-specific classes all start with win32_ (eg. win32_child). Wouldn't it make more sense to use windows_ instead (like windows_child) or a windows namespace? First other libraries use windows_ (see Boost.Interprocess). Second there should be no reason why a class like win32_child can't be used on a 64-bit Windows. Boris

4 5

make_argpack(vec_kwd, make_vector(arg[0], ..., arg[n-1]))
by er 29 May '09

29 May '09

Hi All, Any suggestion for this? typedef typename mpl::transform<range_c<0,n>,meta::kwd >::type vec_kwd_t; arg_list< tagged_argument<tag<0>,A<0> >, ... arg_list< tagged_argument<tag<n-1>,A<n-1> >, empty_arg_list > > make_argpack(vec_kwd,make_vector(arg[0],...,arg[n-1])){ // Step 1: get a vector of tagged_argument vec_tagged_arg_t vec_tagged_arg = fusion::transform( kwds, args, binary_f() ); //OK // Step 2: // recursively construct args_list_t from vec_tagged_arg using // arg_list(TaggedArg arg, Next const& tail) // : Next(tail) // // , arg(arg) // // {} // // A little tedious. Before I go ahead : is this the proper way? // A better solution altogether? } Thanks.

2 4

[thread] getting thread id number
by Hipatia 27 May '09

27 May '09

Hi! I'm trying to get the id number of a thread just to write it to the standard output. Since I'm not an expert in c++ programming, let me explain what I do (even if it's quite simple): a create an instance as follows, boost::thread::id thread_id= boost::this_thread::get_id(); By debugging my code with Visual Studio, I see that 'thread_id' has an 'unsigned int' object member called 'id', so I would like to display this value. Unfortunately, I cannot find in the boost documentation any function member of boost::thread::id class that returns its value. Thanks, Hipatia. -- View this message in context: http://www.nabble.com/-thread--getting-thread-id-number-tp23222717p23222717… Sent from the Boost - Users mailing list archive at Nabble.com.

5 6

[Boost.MPI] SendingReceiving an array "view"
by Joel Falcou 27 May '09

27 May '09

I have a small class view<T> that containes a T* and a size. When I send/receive view using Boost.MPI, I want transfert the actual n data pointed by the view pointer and send the size. On receiving, i will receive the size, checks if they are compatible and receive the data into the zone pointed by the pointer of the receiving view. Of course, I may do something more complex than send/Receive, like all_2_all etc. So i was thinking to give view<T> a proper serialize function so boost.serialization may kick in. As the behavior of sending and receiving is different, I use the load/save idiom to separate the behavior. The question is then, how to serialize the n elements poitned by a raw pointer to those data in an efficient way ? Regards

4 4

[wave] assertion failed - multithread issue?
by Ein Held 23 May '09

23 May '09

Hello when parsing some cpp files via boost.wave using multiple threads, I randomly get a failed assertion. "Assertion failed: static_cast<RefCountType>(*d.begin()) != 0, file C:\projekte\libs\boost\include\boost-1_38/boost/wave/util/flex_string.hpp, line 1216" I am pretty sure that this is a multi-thread issue, as when using only one thread to parse the files, everything works fine. Unfortunately I cannot give you more specific information as I cannot get gdb to run on my system. I am using gcc 4.3.3 Thank you

2 2

Design for boost::serialization of STL iterators.
by Carlo Wood 23 May '09

23 May '09

On Sat, Mar 11, 2006 at 11:45:36PM +0200, Peter Dimov wrote: > Carlo Wood wrote: > > > 1) WHY does boost::serialization not support serialization > > of iterators? > > It's very hard, if not impossible, in general. It is either impossible or possible. When it is possible, it can't be hard :p I think that at the moment of serialization, the actual container needs to be known. So, only concentrating on the syntax of the code that serializes an iterator, the following cannot work: ar & iter; However, the container will be known at that point (or at least, we might as well assume that). Therefore, I could imagine a syntax like: ar & foobar(container, iter); where 'foobar' is some template function (that will be part of boost::serialization in the future). Lets start with the last one (have to start somewhere). In order to deserialize the iterator (and taken into account that we already have the container) -- which makes me think that it might be better to pass a functor to operator& above. In other words, (at least for writing), use: template<class Container> struct Foobar { Foobar(Container const&, typename Container::const_iterator& iter) : M_container(container), M_iter(iter); private: Container const& M_container; Container::const_iterator& M_iter; }; and then assign to M_iter, whatever we find in M_container. > If you have access to the container to which the iterator i refers: > > a) if the container is a map, you can serialize i->first, then on > deserialization look up the key in the map using .find(); > > b) if the container is a sequence, and it has the same contents on > deserialization as it does on serialization, you can serialize the index of > the element - distance( c.begin(), i ). I don't think that it is a requirement that the whole container has to be read: either it's a map or set, in which case later insertions will not invalidate the container, or it is a vector, in which case we use an index, from which we can construct the end iterators before the whole container is reconstructed. Therefore, the following syntax can work imho: ar & FooBar(container, iter); Would you agree? There are a zillion questions and implementation details open - but I'd like to get anyones feedback about this type of interface for iterators before continuing. Current questions: What is a good name for Foobar? Am I right when I think that Foobar needs to be declared in boost::serialization? Now the hard part (for me) is that part that involves the internals of the boost library. At the moment one tries to serialize an iterator, it is possible (though not necessarily) that the object that the iterator points to is already serialized. In the case that we are dealing with an associative container (map or set etc), we don't want to store the contents of the object (or key part, in the case of a map) again: I'd like to just store that once, and store a reference in the archive at the other place. How can I make the library store an object only the first time and the store a reference the second time? This would be for an object of arbitrary type thus. I think that it is only feasible to do this when it's actually the same object (same memory address), which is the case; but while storing the object element of the container, the address of it isn't stored as well, is it? Is there a way to make: std::set<SomeData> s; [...] ar << s; Store the address of s (&s) along with the contents of s? And would that then automatically cause the library to not store that same object again when I do: std::set<SomeData>::iterator iter = s.find(...); [...] ar << *iter; Because then, &*iter would again be the same memory address as what was stored before. -- Carlo Wood <carlo(a)alinoe.com>

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[test] Ignoring SIGCHLD for signal codes other than CLD_EXITED
by Gevorg Voskanyan 20 May '09

20 May '09

I could not find a response to the following message: http://lists.boost.org/boost-users/2008/09/40618.php , which proposes to modify ignore_sigchild() implementation to account for a proposed BOOST_TEST_IGNORE_SIGCHLD preprocessor switch. I am seconding this request. Has it ever been considered? Or was it the message simply went unnoticed? Thanks, Gevorg

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Serialization Archive Incompatibility between Boost Versions
by David Graf 19 May '09

19 May '09

Hello How is it possible to load serialized objects with a newer boost version than they have been saved with. I have installed boost version 1.36 and I cannot read archives that have been save with boost 1.35. This is not possible because boost 1.35 puts 'serialization::archive 4' into the files but boost 1.36 needs the archive version 5. I found some information in the documentation that is must be possible to read old archives. But I am not able to do it. I always get exceptions. Thank you in advance for help! David

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