July 2010 - Boost-users - lists.preview.boost.org

About naming of integer log in base 2
by Murilo Adriano Vasconcelos 16 Aug '10

16 Aug '10

Hi all, I implemented a function [0] wich computes the logarithm in base two of integers and want to know what naming is most appropriated: ilog2 or simply log2 [0] - http://svn.boost.org/svn/boost/sandbox/SOC/2010/bits_and_ints/boost/integer… Best, -- Murilo Adriano Vasconcelos http://murilo.wordpress.com

5 19

shared_ptr vs pass object by reference
by Max S. Kaznady 11 Aug '10

11 Aug '10

If I can pass the object by reference to a function, then is there a need to use shared pointers? I demonstrated 3 ways of passing by reference below, but my main concern is just passing a shared_ptr by value VS passing an object reference. #include<iostream> #include <boost/numeric/ublas/matrix.hpp> #include <boost/numeric/ublas/io.hpp> #include <boost/shared_ptr.hpp> // If I can just pass an object like this, this do I really need to use shared pointers? void pass_obj_ref(boost::numeric::ublas::matrix<double> &m) { for (unsigned i = 0; i < m.size1(); ++i) for (unsigned j = 0; j < m.size2(); ++j) m(i, j) = 3 * i + j; } // This is the correct way to pass a pointer, because we create a copy of the pointer inside // the function and we cannot do something to the pointer outside of the scope of the function call void pass_ptr_by_val( boost::shared_ptr<boost::numeric::ublas::matrix<double> > const m) { for (unsigned i = 0; i < m->size1(); ++i) for (unsigned j = 0; j < m->size2(); ++j) (*m)(i, j) = 3 * i + j; } // This is not good since we can modify the pointer within the function, and then // another developer wouldn't know what to do after the function call void pass_ptr_by_ref( boost::shared_ptr<boost::numeric::ublas::matrix<double> > const &m) { for (unsigned i = 0; i < m->size1(); ++i) for (unsigned j = 0; j < m->size2(); ++j) (*m)(i, j) = 3 * i + j; } int main(void) { unsigned s1 = 10, s2 = 20; // regular matrix boost::numeric::ublas::matrix<double> m1(s1, s2); // pass pointer by value boost::shared_ptr<boost::numeric::ublas::matrix<double> > m2( new boost::numeric::ublas::matrix<double>(s1, s2)); // pass pointer by reference boost::shared_ptr<boost::numeric::ublas::matrix<double> > m3( new boost::numeric::ublas::matrix<double>(s1, s2)); pass_obj_ref(m1); pass_ptr_by_val(m2); pass_ptr_by_ref(m3); std::cout << m1 << std::endl; std::cout << *m2 << std::endl; std::cout << *m3 << std::endl; }

4 8

Problem with enable_shared_from_this and shared_ptr
by Ryan McConnehey 06 Aug '10

06 Aug '10

If class "Pool" inherits from enable_shared_from_this the documentation says I'm able to do the following. shared_ptr<Pool> aPool = shared_from_this(); The minimal code I've included shows that this isn't happening. The code compiles but I get this error "tr1::bad_weak_ptr". What should I be doing different? Ryan [CODE] //C++ Includes #include <exception> #include <iostream> #include <vector> #include <algorithm> //Boost Includes #include <boost/shared_ptr.hpp> #include <boost/enable_shared_from_this.hpp> class pool : public boost::enable_shared_from_this< pool > { private: using boost::enable_shared_from_this< pool >::shared_from_this; public: boost::shared_ptr<int> get(void) { boost::shared_ptr<pool> aPool = shared_from_this(); //This is where the tr1::bad_weak_ptr happens. return boost::shared_ptr<int>(new int); } }; int main(int argc, char * argv[]) { try { pool * myPool = new pool; boost::shared_ptr<int> a = myPool->get(); } catch (std::exception & exception) { std::cout << exception.what() << std::endl; } return 0; }

6 13

[distributions]: Inverse Gamma
by Thomas Mang 05 Aug '10

05 Aug '10

Hi, any plans of implementing the inverse gamma distribution as part of the distributions library ? What about multivariate (in particular the multivariate normal and t distributions and Wishart and Dirichlet ) ? thanks, Thomas

4 10

[GIL] Warnings when compiling items in channel_algorithms.hpp
by Nathan Crookston 04 Aug '10

04 Aug '10

All, While writing some image conversion code using scoped_channel_value I encountered several compiler warnings. The following minimal code demonstrates: Compiled with VC8, command line: "cl simple.cpp /Iboost /W3 /EHsc" ////// BEGIN CODE ///////////////////////////// #include "boost/gil/gil_all.hpp" namespace boost { namespace gil { const boost::uint16_t bits12_max_val = 0xFFF; struct bits12_min { static boost::uint16_t apply() { return 0; } }; struct bits12_max { static boost::uint16_t apply() { return bits12_max_val; } }; typedef boost::gil::scoped_channel_value<boost::uint16_t, bits12_min, bits12_max> bits12; namespace detail { template <> struct unsigned_integral_max_value<bits12> : public mpl::integral_c<uint32_t,bits12_max_val> {}; template <> struct unsigned_integral_num_bits<bits12> : public mpl::int_<12> {}; }//end detail GIL_DEFINE_BASE_TYPEDEFS(12, gray) const boost::uint16_t bits14_max_val = 0x3FFF; struct bits14_min { static boost::uint16_t apply() { return 0; } }; struct bits14_max { static boost::uint16_t apply() { return bits14_max_val; } }; typedef boost::gil::scoped_channel_value<boost::uint16_t, bits14_min, bits14_max> bits14; namespace detail { template <> struct unsigned_integral_max_value<bits14> : public mpl::integral_c<uint32_t,bits14_max_val> {}; template <> struct unsigned_integral_num_bits<bits14> : public mpl::int_<14> {}; }//end detail GIL_DEFINE_BASE_TYPEDEFS(14, gray) } } //end gil, boost using namespace boost::gil; int main() { gray14_image_t img14(2,2); color_converted_view<gray12_pixel_t>(view(img14))(1,0); gray32f_image_t img32f(2,2); color_converted_view<gray12_pixel_t>(view(img32f))(1,0); return 0; } ////// END CODE /////////////////////////////// It produces the following warnings, trimmed to only those I thought relevant: ///////////////// BEGIN Relevant Warnings ////////////////////////////////////// c:\cygwin\home\ncrookston\boost\boost\gil\channel_algorithm.hpp(257) : warning C 4244: 'argument' : conversion from 'const double' to 'boost::uint16_t', possible loss of data c:\cygwin\home\ncrookston\boost\boost\gil\channel_algorithm.hpp(252) : w hile compiling class template member function 'boost::gil::scoped_channel_value< BaseChannelValue,MinVal,MaxVal> boost::gil::detail::channel_converter_unsigned_i ntegral_nondivisible<SrcChannelV,DstChannelV,SrcLessThanDst,CannotFitInInteger>: :operator ()(SrcChannelV) const' with [ BaseChannelValue=boost::uint16_t, MinVal=boost::gil::bits12_min, MaxVal=boost::gil::bits12_max, SrcChannelV=boost::gil::scoped_channel_value<boost::uint16_t,boost:: gil::bits14_min,boost::gil::bits14_max>, DstChannelV=boost::gil::scoped_channel_value<boost::uint16_t,boost:: gil::bits12_min,boost::gil::bits12_max>, SrcLessThanDst=false, CannotFitInInteger=false ] <snip lots of instantiation backtrace> c:\cygwin\home\ncrookston\boost\boost\gil\channel_algorithm.hpp(268) : warning C 4244: 'argument' : conversion from 'float' to 'boost::uint16_t', possible loss o f data c:\cygwin\home\ncrookston\boost\boost\gil\channel_algorithm.hpp(268) : w hile compiling class template member function 'boost::gil::scoped_channel_value< BaseChannelValue,MinVal,MaxVal> boost::gil::channel_converter_unsigned<SrcChanne lV,DstChannelV>::operator ()(boost::gil::bits32f) const' with [ BaseChannelValue=boost::uint16_t, MinVal=boost::gil::bits12_min, MaxVal=boost::gil::bits12_max, SrcChannelV=boost::gil::scoped_channel_value<float,boost::gil::float _zero,boost::gil::float_one>, DstChannelV=boost::gil::scoped_channel_value<boost::uint16_t,boost:: gil::bits12_min,boost::gil::bits12_max> ] <snip lots more instantiation backtrace> /////////////////////// END Relevant Warnings ////////////////////////////////////////////////// Interestingly, g++ doesn't have an issue with the code. The following patch corrects the problem. I'd be happy to create a trac ticket, write some tests, etc. Please advise. ////////////// BEGIN Patch ////////////////////////////////////// Index: channel_algorithm.hpp =================================================================== --- channel_algorithm.hpp (revision 63088) +++ channel_algorithm.hpp (working copy) @@ -243,7 +243,18 @@ } }; +// Determines the base type of the channel. +template <typename Channel> +struct base_channel { typedef Channel type; }; +template <typename BaseChannelValue, typename MinVal, typename MaxVal> +struct base_channel<scoped_channel_value<BaseChannelValue,MinVal,MaxVal> > +: public base_channel<BaseChannelValue> {}; + +template <int NumBits> +struct base_channel<packed_channel_value<NumBits> > +{ typedef typename packed_channel_value<NumBits>::integer_t type; }; + // Both source and destination are unsigned integral channels, // the dst max value is less than (or equal to) the src max value, // and the src max value is not divisible by the dst max value @@ -253,8 +264,8 @@ typedef typename unsigned_integral_max_value<SrcChannelV>::value_type integer_t; static const double div = unsigned_integral_max_value<SrcChannelV>::value / double(unsigned_integral_max_value<DstChannelV>::value); - static const integer_t div2 = integer_t(div/2); - return DstChannelV((src + div2) / div); + static const integer_t div2 = static_cast<integer_t>(div/2); + return static_cast<typename base_channel<DstChannelV>::type>((src + div2) / div); } }; @@ -265,7 +276,8 @@ ///////////////////////////////////////////////////// template <typename DstChannelV> struct channel_converter_unsigned<bits32f,DstChannelV> : public std::unary_function<bits32f,DstChannelV> { - DstChannelV operator()(bits32f x) const { return DstChannelV(x*channel_traits<DstChannelV>::max_value()+0.5f); } + DstChannelV operator()(bits32f x) const { return + static_cast<typename detail::base_channel<DstChannelV>::type>(x*channel_traits<DstChannelV>::max_value()+0.5f); } }; template <typename SrcChannelV> struct channel_converter_unsigned<SrcChannelV,bits32f> : public std::unary_function<SrcChannelV,bits32f> { //////// END patch //////////////// Thanks, Nate

2 8

[Serialization] Diamond shaped inheritance and serialization methods specialization
by Robert Bigaignon 02 Aug '10

02 Aug '10

Hi all, I'm having trouble with Boost's serialization library that I'm trying to integrate with an existing class hierarchy that used MFC toolkit as the archiver. It seems that when a serializable class defines a specialized save (or load or serialize for that matter) in addition to the generic method, the serialization library gets confused and ends up not identify properly that the hierarchy of serializable classes uses multiple inheritance and in particular diamond-shaped inheritance. I've reproduced the problem using the test_diamond code example provided with Boost 1.43 using MS VC 9.0 by adding a save method specialized for archive::text_oarchive to the derived1 class defined in test_diamond.cpp. The following diff shows the implementation of this specialized method: -----8<----- --- ../temp/boost_1_43_0/boost_1_43_0/libs/serialization/test/test_diamond.cpp Wed Jul 14 11:28:02 2010 +++ ../serializationProto.cpp Wed Jul 28 13:05:47 2010 @@ -95,6 +97,13 @@ ar << BOOST_SERIALIZATION_BASE_OBJECT_NVP(base); } + template<> + void save(boost::archive::text_oarchive &ar, const unsigned int i) const + { + std::cout << "Saving (Text) derived1\n"; + ar << BOOST_SERIALIZATION_BASE_OBJECT_NVP(base); + } + template<class Archive> void load(Archive & ar, const unsigned int /* file_version */) { @@ -122,6 +131,7 @@ } BOOST_SERIALIZATION_SPLIT_MEMBER() + }; class final : public derived1, public derived2 { @@ -202,3 +212,219 @@ return EXIT_SUCCESS; } ----->8----- Adding the following function definition to will result in an access violation (see call stack bellow) in access.hpp @ line 136. Any idea as to what is intrinsically wrong with code or how to fix this issue is most welcome. Call stack: > serializationProtoArchiversWrappers.exe!boost::serialization::access::cast_reference<base const ,derived2 const >(const derived2 & u={...}) Line 136 + 0x1a bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::base_object<base,derived2 const >(const derived2 & d={...}) Line 105 + 0x9 bytes C++ serializationProtoArchiversWrappers.exe!derived2::save<boost::archive::text_oarchive>(boost::archive::text_oarchive & ar={...}, const unsigned int __formal=0) Line 134 + 0x9 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::access::member_save<boost::archive::text_oarchive,derived2 const >(boost::archive::text_oarchive & ar={...}, const derived2 & t={...}, const unsigned int file_version=0) Line 94 C++ serializationProtoArchiversWrappers.exe!boost::serialization::detail::member_saver<boost::archive::text_oarchive,derived2>::invoke(boost::archive::text_oarchive & ar={...}, const derived2 & t={...}, const unsigned int file_version=0) Line 43 + 0x11 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::split_member<boost::archive::text_oarchive,derived2>(boost::archive::text_oarchive & ar={...}, derived2 & t={...}, const unsigned int file_version=0) Line 69 + 0x11 bytes C++ serializationProtoArchiversWrappers.exe!derived2::serialize<boost::archive::text_oarchive>(boost::archive::text_oarchive & ar={...}, const unsigned int file_version=0) Line 144 + 0x34 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::access::serialize<boost::archive::text_oarchive,derived2>(boost::archive::text_oarchive & ar={...}, derived2 & t={...}, const unsigned int file_version=0) Line 119 C++ serializationProtoArchiversWrappers.exe!boost::serialization::serialize<boost::archive::text_oarchive,derived2>(boost::archive::text_oarchive & ar={...}, derived2 & t={...}, const unsigned int file_version=0) Line 74 + 0x11 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::serialize_adl<boost::archive::text_oarchive,derived2>(boost::archive::text_oarchive & ar={...}, derived2 & t={...}, const unsigned int file_version=0) Line 133 + 0x18 bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::oserializer<boost::archive::text_oarchive,derived2>::save_object_data(boost::archive::detail::basic_oarchive & ar={...}, const void * x=0x0034de3c) Line 152 + 0x3e bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::basic_oarchive_impl::save_object(boost::archive::detail::basic_oarchive & ar={...}, const void * t=0x0034de3c, const boost::archive::detail::basic_oserializer & bos={...}) Line 285 C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::basic_oarchive::save_object(const void * x=0x0034de3c, const boost::archive::detail::basic_oserializer & bos={...}) Line 434 C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::save_non_pointer_type<boost::archive::text_oarchive>::save_standard::invoke<derived2>(boost::archive::text_oarchive & ar={...}, const derived2 & t={...}) Line 259 C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::save_non_pointer_type<boost::archive::text_oarchive>::invoke<derived2>(boost::archive::text_oarchive & ar={...}, const derived2 & t={...}) Line 308 + 0xd bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::save<boost::archive::text_oarchive,derived2 const >(boost::archive::text_oarchive & ar={...}, const derived2 & t={...}) Line 525 + 0xd bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::common_oarchive<boost::archive::text_oarchive>::save_override<derived2 const >(const derived2 & t={...}, int __formal=0) Line 69 + 0x15 bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::basic_text_oarchive<boost::archive::text_oarchive>::save_override<derived2 const >(const derived2 & t={...}, int __formal=0) Line 81 C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::interface_oarchive<boost::archive::text_oarchive>::operator<<<derived2 const >(const derived2 & t={...}) Line 64 C++ serializationProtoArchiversWrappers.exe!boost::serialization::nvp<derived2 const >::save<boost::archive::text_oarchive>(boost::archive::text_oarchive & ar={...}, const unsigned int __formal=0) Line 80 C++ serializationProtoArchiversWrappers.exe!boost::serialization::access::member_save<boost::archive::text_oarchive,boost::serialization::nvp<derived2 const > const >(boost::archive::text_oarchive & ar={...}, const boost::serialization::nvp<derived2 const > & t={...}, const unsigned int file_version=0) Line 94 C++ serializationProtoArchiversWrappers.exe!boost::serialization::detail::member_saver<boost::archive::text_oarchive,boost::serialization::nvp<derived2 const > >::invoke(boost::archive::text_oarchive & ar={...}, const boost::serialization::nvp<derived2 const > & t={...}, const unsigned int file_version=0) Line 43 + 0x11 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::split_member<boost::archive::text_oarchive,boost::serialization::nvp<derived2 const > >(boost::archive::text_oarchive & ar={...}, boost::serialization::nvp<derived2 const > & t={...}, const unsigned int file_version=0) Line 69 + 0x11 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::nvp<derived2 const >::serialize<boost::archive::text_oarchive>(boost::archive::text_oarchive & ar={...}, const unsigned int file_version=0) Line 89 + 0x34 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::access::serialize<boost::archive::text_oarchive,boost::serialization::nvp<derived2 const > >(boost::archive::text_oarchive & ar={...}, boost::serialization::nvp<derived2 const > & t={...}, const unsigned int file_version=0) Line 119 C++ serializationProtoArchiversWrappers.exe!boost::serialization::serialize<boost::archive::text_oarchive,boost::serialization::nvp<derived2 const > >(boost::archive::text_oarchive & ar={...}, boost::serialization::nvp<derived2 const > & t={...}, const unsigned int file_version=0) Line 74 + 0x11 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::serialize_adl<boost::archive::text_oarchive,boost::serialization::nvp<derived2 const > >(boost::archive::text_oarchive & ar={...}, boost::serialization::nvp<derived2 const > & t={...}, const unsigned int file_version=0) Line 133 + 0x18 bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::save_non_pointer_type<boost::archive::text_oarchive>::save_only::invoke<boost::serialization::nvp<derived2 const > >(boost::archive::text_oarchive & ar={...}, const boost::serialization::nvp<derived2 const > & t={...}) Line 245 + 0xf bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::save_non_pointer_type<boost::archive::text_oarchive>::invoke<boost::serialization::nvp<derived2 const > >(boost::archive::text_oarchive & ar={...}, const boost::serialization::nvp<derived2 const > & t={...}) Line 308 + 0xd bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::save<boost::archive::text_oarchive,boost::serialization::nvp<derived2 const > const >(boost::archive::text_oarchive & ar={...}, const boost::serialization::nvp<derived2 const > & t={...}) Line 525 + 0xd bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::common_oarchive<boost::archive::text_oarchive>::save_override<boost::serialization::nvp<derived2 const > const >(const boost::serialization::nvp<derived2 const > & t={...}, int __formal=0) Line 69 + 0x15 bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::basic_text_oarchive<boost::archive::text_oarchive>::save_override<boost::serialization::nvp<derived2 const > const >(const boost::serialization::nvp<derived2 const > & t={...}, int __formal=0) Line 81 C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::interface_oarchive<boost::archive::text_oarchive>::operator<<<boost::serialization::nvp<derived2 const > const >(const boost::serialization::nvp<derived2 const > & t={...}) Line 64 C++ serializationProtoArchiversWrappers.exe!final::save<boost::archive::text_oarchive>(boost::archive::text_oarchive & ar={...}, const unsigned int __formal=0) Line 159 C++ serializationProtoArchiversWrappers.exe!boost::serialization::access::member_save<boost::archive::text_oarchive,final const >(boost::archive::text_oarchive & ar={...}, const final & t={...}, const unsigned int file_version=0) Line 94 C++ serializationProtoArchiversWrappers.exe!boost::serialization::detail::member_saver<boost::archive::text_oarchive,final>::invoke(boost::archive::text_oarchive & ar={...}, const final & t={...}, const unsigned int file_version=0) Line 43 + 0x11 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::split_member<boost::archive::text_oarchive,final>(boost::archive::text_oarchive & ar={...}, final & t={...}, const unsigned int file_version=0) Line 69 + 0x11 bytes C++ serializationProtoArchiversWrappers.exe!final::serialize<boost::archive::text_oarchive>(boost::archive::text_oarchive & ar={...}, const unsigned int file_version=0) Line 169 + 0x34 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::access::serialize<boost::archive::text_oarchive,final>(boost::archive::text_oarchive & ar={...}, final & t={...}, const unsigned int file_version=0) Line 119 C++ serializationProtoArchiversWrappers.exe!boost::serialization::serialize<boost::archive::text_oarchive,final>(boost::archive::text_oarchive & ar={...}, final & t={...}, const unsigned int file_version=0) Line 74 + 0x11 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::serialize_adl<boost::archive::text_oarchive,final>(boost::archive::text_oarchive & ar={...}, final & t={...}, const unsigned int file_version=0) Line 133 + 0x18 bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::oserializer<boost::archive::text_oarchive,final>::save_object_data(boost::archive::detail::basic_oarchive & ar={...}, const void * x=0x0034de38) Line 152 + 0x3e bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::basic_oarchive_impl::save_object(boost::archive::detail::basic_oarchive & ar={...}, const void * t=0x0034de38, const boost::archive::detail::basic_oserializer & bos={...}) Line 265 C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::basic_oarchive::save_object(const void * x=0x0034de38, const boost::archive::detail::basic_oserializer & bos={...}) Line 434 C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::save_non_pointer_type<boost::archive::text_oarchive>::save_standard::invoke<final>(boost::archive::text_oarchive & ar={...}, const final & t={...}) Line 259 C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::save_non_pointer_type<boost::archive::text_oarchive>::invoke<final>(boost::archive::text_oarchive & ar={...}, const final & t={...}) Line 308 + 0xd bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::save<boost::archive::text_oarchive,final const >(boost::archive::text_oarchive & ar={...}, const final & t={...}) Line 525 + 0xd bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::common_oarchive<boost::archive::text_oarchive>::save_override<final const >(const final & t={...}, int __formal=0) Line 69 + 0x15 bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::basic_text_oarchive<boost::archive::text_oarchive>::save_override<final const >(const final & t={...}, int __formal=0) Line 81 C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::interface_oarchive<boost::archive::text_oarchive>::operator<<<final const >(const final & t={...}) Line 64 C++ serializationProtoArchiversWrappers.exe!boost::serialization::nvp<final>::save<boost::archive::text_oarchive>(boost::archive::text_oarchive & ar={...}, const unsigned int __formal=0) Line 80 C++ serializationProtoArchiversWrappers.exe!boost::serialization::access::member_save<boost::archive::text_oarchive,boost::serialization::nvp<final> const >(boost::archive::text_oarchive & ar={...}, const boost::serialization::nvp<final> & t={...}, const unsigned int file_version=0) Line 94 C++ serializationProtoArchiversWrappers.exe!boost::serialization::detail::member_saver<boost::archive::text_oarchive,boost::serialization::nvp<final> >::invoke(boost::archive::text_oarchive & ar={...}, const boost::serialization::nvp<final> & t={...}, const unsigned int file_version=0) Line 43 + 0x11 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::split_member<boost::archive::text_oarchive,boost::serialization::nvp<final> >(boost::archive::text_oarchive & ar={...}, boost::serialization::nvp<final> & t={...}, const unsigned int file_version=0) Line 69 + 0x11 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::nvp<final>::serialize<boost::archive::text_oarchive>(boost::archive::text_oarchive & ar={...}, const unsigned int file_version=0) Line 89 + 0x34 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::access::serialize<boost::archive::text_oarchive,boost::serialization::nvp<final> >(boost::archive::text_oarchive & ar={...}, boost::serialization::nvp<final> & t={...}, const unsigned int file_version=0) Line 119 C++ serializationProtoArchiversWrappers.exe!boost::serialization::serialize<boost::archive::text_oarchive,boost::serialization::nvp<final> >(boost::archive::text_oarchive & ar={...}, boost::serialization::nvp<final> & t={...}, const unsigned int file_version=0) Line 74 + 0x11 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::serialize_adl<boost::archive::text_oarchive,boost::serialization::nvp<final> >(boost::archive::text_oarchive & ar={...}, boost::serialization::nvp<final> & t={...}, const unsigned int file_version=0) Line 133 + 0x18 bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::save_non_pointer_type<boost::archive::text_oarchive>::save_only::invoke<boost::serialization::nvp<final> >(boost::archive::text_oarchive & ar={...}, const boost::serialization::nvp<final> & t={...}) Line 245 + 0xf bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::save_non_pointer_type<boost::archive::text_oarchive>::invoke<boost::serialization::nvp<final> >(boost::archive::text_oarchive & ar={...}, const boost::serialization::nvp<final> & t={...}) Line 308 + 0xd bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::save<boost::archive::text_oarchive,boost::serialization::nvp<final> const >(boost::archive::text_oarchive & ar={...}, const boost::serialization::nvp<final> & t={...}) Line 525 + 0xd bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::common_oarchive<boost::archive::text_oarchive>::save_override<boost::serialization::nvp<final> const >(const boost::serialization::nvp<final> & t={...}, int __formal=0) Line 69 + 0x15 bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::basic_text_oarchive<boost::archive::text_oarchive>::save_override<boost::serialization::nvp<final> const >(const boost::serialization::nvp<final> & t={...}, int __formal=0) Line 81 C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::interface_oarchive<boost::archive::text_oarchive>::operator<<<boost::serialization::nvp<final> const >(const boost::serialization::nvp<final> & t={...}) Line 64 C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::pointer_oserializer<boost::archive::text_oarchive,final>::save_object_ptr(boost::archive::detail::basic_oarchive & ar={...}, const void * x=0x0034de38) Line 202 C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::basic_oarchive_impl::save_pointer(boost::archive::detail::basic_oarchive & ar={...}, const void * t=0x0034de38, const boost::archive::detail::basic_pointer_oserializer * bpos_ptr=0x005967c8) Line 403 C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::basic_oarchive::save_pointer(const void * t=0x0034de38, const boost::archive::detail::basic_pointer_oserializer * bpos_ptr=0x005967c8) Line 442 C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::save_pointer_type<boost::archive::text_oarchive>::polymorphic::save<base>(boost::archive::text_oarchive & ar={...}, base & t={...}) Line 445 C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::save_pointer_type<boost::archive::text_oarchive>::save<base>(boost::archive::text_oarchive & ar={...}, const base & t={...}) Line 460 + 0xd bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::save_pointer_type<boost::archive::text_oarchive>::invoke<base const *>(boost::archive::text_oarchive & ar={...}, const base * const t=0x0034de38) Line 473 + 0xd bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::save<boost::archive::text_oarchive,base const * const>(boost::archive::text_oarchive & ar={...}, const base * const & t=0x0034de38) Line 525 + 0xf bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::common_oarchive<boost::archive::text_oarchive>::save_override<base const * const>(const base * const & t=0x0034de38, int __formal=0) Line 69 + 0x15 bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::basic_text_oarchive<boost::archive::text_oarchive>::save_override<base const * const>(const base * const & t=0x0034de38, int __formal=0) Line 81 C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::interface_oarchive<boost::archive::text_oarchive>::operator<<<base const * const>(const base * const & t=0x0034de38) Line 64 C++ serializationProtoArchiversWrappers.exe!boost::serialization::nvp<base const *>::save<boost::archive::text_oarchive>(boost::archive::text_oarchive & ar={...}, const unsigned int __formal=0) Line 80 C++ serializationProtoArchiversWrappers.exe!boost::serialization::access::member_save<boost::archive::text_oarchive,boost::serialization::nvp<base const *> const >(boost::archive::text_oarchive & ar={...}, const boost::serialization::nvp<base const *> & t={...}, const unsigned int file_version=0) Line 94 C++ serializationProtoArchiversWrappers.exe!boost::serialization::detail::member_saver<boost::archive::text_oarchive,boost::serialization::nvp<base const *> >::invoke(boost::archive::text_oarchive & ar={...}, const boost::serialization::nvp<base const *> & t={...}, const unsigned int file_version=0) Line 43 + 0x11 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::split_member<boost::archive::text_oarchive,boost::serialization::nvp<base const *> >(boost::archive::text_oarchive & ar={...}, boost::serialization::nvp<base const *> & t={...}, const unsigned int file_version=0) Line 69 + 0x11 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::nvp<base const *>::serialize<boost::archive::text_oarchive>(boost::archive::text_oarchive & ar={...}, const unsigned int file_version=0) Line 89 + 0x34 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::access::serialize<boost::archive::text_oarchive,boost::serialization::nvp<base const *> >(boost::archive::text_oarchive & ar={...}, boost::serialization::nvp<base const *> & t={...}, const unsigned int file_version=0) Line 119 C++ serializationProtoArchiversWrappers.exe!boost::serialization::serialize<boost::archive::text_oarchive,boost::serialization::nvp<base const *> >(boost::archive::text_oarchive & ar={...}, boost::serialization::nvp<base const *> & t={...}, const unsigned int file_version=0) Line 74 + 0x11 bytes C++ serializationProtoArchiversWrappers.exe!boost::serialization::serialize_adl<boost::archive::text_oarchive,boost::serialization::nvp<base const *> >(boost::archive::text_oarchive & ar={...}, boost::serialization::nvp<base const *> & t={...}, const unsigned int file_version=0) Line 133 + 0x18 bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::save_non_pointer_type<boost::archive::text_oarchive>::save_only::invoke<boost::serialization::nvp<base const *> >(boost::archive::text_oarchive & ar={...}, const boost::serialization::nvp<base const *> & t={...}) Line 245 + 0xf bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::save_non_pointer_type<boost::archive::text_oarchive>::invoke<boost::serialization::nvp<base const *> >(boost::archive::text_oarchive & ar={...}, const boost::serialization::nvp<base const *> & t={...}) Line 308 + 0xd bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::save<boost::archive::text_oarchive,boost::serialization::nvp<base const *> const >(boost::archive::text_oarchive & ar={...}, const boost::serialization::nvp<base const *> & t={...}) Line 525 + 0xd bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::common_oarchive<boost::archive::text_oarchive>::save_override<boost::serialization::nvp<base const *> const >(const boost::serialization::nvp<base const *> & t={...}, int __formal=0) Line 69 + 0x15 bytes C++ serializationProtoArchiversWrappers.exe!boost::archive::basic_text_oarchive<boost::archive::text_oarchive>::save_override<boost::serialization::nvp<base const *> const >(const boost::serialization::nvp<base const *> & t={...}, int __formal=0) Line 81 C++ serializationProtoArchiversWrappers.exe!boost::archive::detail::interface_oarchive<boost::archive::text_oarchive>::operator<<<boost::serialization::nvp<base const *> const >(const boost::serialization::nvp<base const *> & t={...}) Line 64 C++ serializationProtoArchiversWrappers.exe!test_main(int __formal=1, int __formal=1) Line 210 C++ serializationProtoArchiversWrappers.exe!main(int argc=1, char * * argv=0x0034e198) Line 180 + 0xd bytes C++ -- Robert Bigaignon

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[Graph] Problems with in-edges for a user defined AdjacencyList
by Berit Løfstedt 31 Jul '10

31 Jul '10

Hi, I am fairly new to boost and I have a problem using the in_edges(v, G) function. I have defined a graph of type AdjacencyList: typedef adjacency_list< vecS, vecS, directedS, VertexProperties, EdgeProperties > mcf_graph; The following code with m_current_network being a private class variable of type mcf_graph void best_insertion::search() { vertex_descriptor v,u,w; edge_descriptor e; graph_traits<mcf_graph>::in_edge_iterator in_e, in_end; graph_traits<mcf_graph>::out_edge_iterator out_e, out_end; edge_index_map_t edge_indices=get ( edge_index, m_current_network ); edge_type_map_t edge_types= get(edge_type, m_current_network); capacity_map_t edge_capacities=get ( edge_capacity, m_current_network ); vector<int> indices; vector<int>::iterator it, it_end; //select vertex v to reinsert //find_edge_indices of vertex v for ( tie ( in_e, in_end ) = in_edges(v, m_current_network ); in_e != in_end; in_e++ ) { e=*in_e; indices.push_back ( edge_indices[e] ); } for ( tie ( out_e, out_end ) = out_edges( v, m_current_network ); out_e != out_end; out_e++ ) { e=*out_e; indices.push_back ( edge_indices[e] ); } produces the error: error: no matching function for call to 'in_edges(vertex_descriptor&, mcf_graph&)' The problem does not occur for out_edges. From the examples I have seen AdjacencyList should support both functions. Can anybody explain to me why in_edges do not work for this example? -- Best Regards, Berit Løfstedt PhD. Student DTU Management Engineering, Operations Research Technical University of Denmark Department of Management Engineering Produktionstorvet, Bygning 426 2800 Kgs. Lyngby blof(a)man.dtu.dk <mailto:blof@man.dtu.dk> www.or.man.dtu.dk <http://www.or.man.dtu.dk>

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How often is boost::interprocess::message_queue::receive signaled?
by Andre Kirchner 31 Jul '10

31 Jul '10

Hi all, How often is method boost::interprocess::message_queue::receive signaled assuming there is data in the queue? Is it just at the end/beginning of a time-slice? I have been debugging a piece of code that is showing that receive is signaled at intervals of 15, 30 or 45 ms, and 15 ms is the duration of the time-slice of the of Windows OS when running on a multicore machine. Is there a way to increase the priority of the thread that is blocked at a receive method in a way that it would be executed right after it's signaled? Or if not possible, what other mechanism could be used? Thanks, Andre

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[Asio] Dispatch question
by Malinka Rellikwodahs 31 Jul '10

31 Jul '10

Hello List, Attached is a piece of sample code in which I'm trying to use Boost.Asio to dispatch a call that will cause the program to shutdown, however for some reason the io_service is not ever calling the handle_stop method, so the program does not shutdown. Any help would be greatly appreciated.

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std::fill with boost::numeric::ublas::triangular_matrix
by Max S. Kaznady 31 Jul '10

31 Jul '10

I am trying to figure out a way of doing the following (initialize a lower-triangular matrix P with 0's and fill the last row with 1's) using iterators: int n = 10; boost::numeric::ublas::triangular_matrix<double, lower>P(n, n); P = boost::numeric::ublas::zero_matrix<double>(n,n); for (unsigned col = 0; col < n; ++col) P(n, col) = 1.0; I want to try and use std::fill, so something like std::fill(P.begin1(), P.end() - (adjust pointer to not include the last row), 0.0); std::fill(P.begin2(), P.end2(), 1.0); I can't seem to find any examples though on how to use iterators for Boost lower triangular matrices. I know how to do this using STL vector, that's easy, but I'm not sure how to adjust the iterator pointer in this case. Thanks in advance for your help. Cheers, Max

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