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Multiplying a matrix and vector ===> vector
by Vipin Varma 29 Oct '12

29 Oct '12

Dear all, My basic requirement is to multiply a matrix and a vector and then to store it into a vector using Boost's UBLAS. When I multiply a boost::numeric::ublas::compressed_matrix with a boost::numeric::ublas::vector using prod(matrix, vector), the output is a boost::numeric::ublas::matrix_vector_binary1. E.g. <PSEUDOCODE> boost::numeric::ublas::compressed_matrix m; boost::numeric::ublas::vector x; boost::numeric::ublas::matrix_vector_binary1<compressed_matrix, vector, ? > tmp; tmp = prod(m,x); <PSEUDOCODE> The problem is that in the third field --- which expects the operation type --- in line 3, I do not know what to enter or how to specify the type of operation; I tried '*' and 'prod' and 'vector' and 'compressed_matrix' but none work. Alternatively, I can avoid the tmp variable altogether and get a working program to copy the result of matrix-vector multiplication onto a new vector y but then I would need two multiplications. E.g. <CODE> std::copy(prod(m,x).begin(), prod(m,x).end(), y.begin()); <CODE> Any suggestions on how to declare a matrix_vector_binary1 correctly or how to get the finaly result efficiently onto a vector will be appreciated. Regards, Vipin

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build process of boost code & lib creation
by danianton＠libero.it 29 Oct '12

29 Oct '12

Hi, I’am using boost in my application. I need an explanation about build process and library creation. I’d know if there is an alternative to bjam, could I use a make file made by me? It’s difficult to implement a build process? The .lib files generated by b2 process are created from the source file contained in the archive file? Thanks. Best regards, Daniele.

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[Thread] Win32 TLS problem with dynamic libraries
by Сергей Захарченко 29 Oct '12

29 Oct '12

Hello, I need to build a shared plugin library with Boost libraries linked statically into it. As many may know, there's a problem with having a .tls section in Win32 dynamic libraries which are to be loaded via LoadLibrary, but Boost.Thread insists on having one. Assuming that I can guarantee that no Boost.Thread functions are called from non-Boost.Thread threads, it shouldn't be needed. Apart from patching the Boost.Thread sources, or the resulting binaries, what's the best way of eliminating it? I assume that I need to eliminate tss_pe.cpp from linkage, but I don't seem to be able to. Adding a namespace boost { void tss_cleanup_implemented() {} } to one of the library's sources doesn't help, as it results in a multiply defined symbol error (compiler MSVC2008 from Express edition). Any suggestions? Thank you, -- Sergey Zakharchenko

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Boost installation inquiry
by mega deth 29 Oct '12

29 Oct '12

Hello Boost User Community, I am a big fan of boost C++ having used it for a college class to do threading. I want to get back into it and I previously installed boost on a windows machine, now dealing with a Linux machine would like some help as I have run into difficulties with the installation process. First off, I would like to build threads and regex libraries. I have gotten the first example show below to work correctly: #include <boost/lambda/lambda.hpp> #include <iostream> #include <iterator> #include <algorithm> int main() { using namespace boost::lambda; typedef std::istream_iterator<int> in; std::for_each( in(std::cin), in(), std::cout << (_1 * 3) << " " ); } My main issue is the next part. I have Boost is located in /usr/local/boost_1_51_0 I have run the following steps: 1. Go to the directory tools/build/v2/. 2. Run bootstrap.sh 3. Run b2 install --prefix=PREFIX where PREFIX is the directory where you want Boost.Build to be installed 4. Add PREFIX/bin to your PATH environment variable. For the 3rd step, I ran b2 as follows: b2 --build-dir=~/bin/Boos tC++1.51/ toolset=gcc stage My PATH looks like this: > echo $PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/root/bin :/root/bin/BoostC++1.51/bin/ g++ I- /root/boost/ /root/bin/repos/c-projects/c++/C++Projects/Boost/testLinkToBoostLib.cpp -o example \ > ~/boost/stage/lib/libboost_ libboost_chrono.a libboost_regex.a libboost_chrono.so libboost_regex.so libboost_chrono.so.1.51.0 libboost_regex.so.1.51.0 libboost_filesystem.a libboost_system.a libboost_filesystem.so libboost_system.so libboost_filesystem.so.1.51.0 libboost_system.so.1.51.0 libboost_program_options.a libboost_thread.a libboost_program_options.so libboost_thread.so libboost_program_options.so.1.51.0 libboost_thread.so.1.51.0 Finally this is my issue: When I try to compile the test regex code with boost, I am unable to find the correct library to include. I fear that because I have this issue, that my thread library is not built as well. Is there a way to check? Can you provide what worked for you to install boost on your linux machine. c++ -I path/to/boost_1_51_0 example.cpp -o example \ ~/boost/stage/lib/libboost_regex-gcc34-mt-d-1_36.a I am unable to find or even create this: libboost_regex-gcc34-mt-d-1_36.a If you have any advise or direction please let me know. Thank you! There was some talk about checking the configuration of the user-config.jam if there are linker or compile issues. But I do not think those could be the issues at the moment. Thank you in advance for looking at my issue! ~Jake

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Boost random not looking so random
by Robin Rowe 28 Oct '12

28 Oct '12

I'm using boost to shuffle an array, but it's not looking as random as I would expect. Am I not using it right? The code below outputs sequences that look random mostly, but I see patterns such as 7 7 12 12 11. boost::random::mt19937 rng; boost::minstd_rand lcggen; lcggen.seed(clockTime); rng.seed(lcggen); unsigned min=1; unsigned max=15; for(unsigned i=0;i<5;i++) { boost::random::uniform_int_distribution<> dist(min,max); const int j = dist(rng); ... code that shuffles stuff using j ... min++; cout<<j<<' '; } Suggestions? Thanks! Robin -- www.cinepaint.org

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cygwin build error on boost filesystem
by Kraus Philipp 27 Oct '12

27 Oct '12

Hello, I try to build the Boost 1.51 on the latest Cygwin version: I'm using this commands: export BZIP2_BINARY=bz2 export ZLIB_BINARY=z export ZLIB_INCLUDE=/cygdrive/c/Users/Administrator/Documents/zlib/1.2.7/include export ZLIB_LIBPATH=/cygdrive/c/Users/Administrator/Documents/zlib/1.2.7/lib export BZIP2_INCLUDE=/cygdrive/c/Users/Administrator/Documents/bzip2/1.0.6/include export BZIP2_LIBPATH=/cygdrive/c/Users/Administrator/Documents/bzip2/1.0.6/lib cd library/boost_1_51_0 ./bootstrap.sh ./b2 --with-exception --with-filesystem --with-math --with-random --with-regex --with-date_time --with-thread --with-system --with-program_options --with-serialization --with-iostreams --layout=system link=shared runtime-link=shared threading=multi variant=release install --prefix=../boost/1.51.0 ./boost/filesystem/path_traits.hpp: At global scope: ./boost/filesystem/path_traits.hpp:224: error: `std::wstring' has not been declared ./boost/filesystem/path_traits.hpp:228: error: ISO C++ forbids declaration of `to' with no type In file included from ./boost/filesystem/operations.hpp:25, from libs\filesystem\src\unique_path.cpp:20: ./boost/filesystem/path.hpp:378: error: ISO C++ forbids declaration of `wstring' with no type ./boost/filesystem/path.hpp:378: error: invalid use of `::' ./boost/filesystem/path.hpp:378: error: expected `;' before '&' token ./boost/filesystem/path.hpp:379: error: expected `;' before "const" ./boost/filesystem/path.hpp:379: error: ISO C++ forbids declaration of `wstring' with no type ./boost/filesystem/path.hpp:379: error: invalid use of `::' ./boost/filesystem/path.hpp:379: error: expected `;' before '&' token ./boost/filesystem/path.hpp:400: error: expected `;' before "template" ./boost/filesystem/path.hpp:409: error: ISO C++ forbids declaration of `wstring' with no type ./boost/filesystem/path.hpp:409: error: invalid use of `::' ./boost/filesystem/path.hpp:409: error: expected `;' before "generic_wstring" ... The Boost filesystem is not build on the command the full build process is stop with the error Is this an error on my installation and how can I solve the problem? Thanks a lot Phil

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use boost preprocessor to generate T1 t1, T2 t2 ...
by weiqingh 27 Oct '12

27 Oct '12

hi there, I would like to use boost preprocessor to generate something like this: (for n from 0 to N with n = 2 in the following example) template <typename T1, typename T2> void foo(T1 t1, T2 t2) I have tried to use BOOST_PP_ENUM_PARAMS but cannot figure out how to get both T_i and t_i changed each time. is there some other macros I can use? any help is highly appreciated. Thanks, -- View this message in context: http://boost.2283326.n4.nabble.com/use-boost-preprocessor-to-generate-T1-t1… Sent from the Boost - Users mailing list archive at Nabble.com.

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Re: [Boost-users] [boost] Fwd: Re: [system] symbol visibility and GCC vs. Clang
by Michel Morin 26 Oct '12

26 Oct '12

Fixed in r81068. Since dllexport/dllimport are not fully supported on clang (see http://llvm.org/bugs/show_bug.cgi?id=11170 ), I didn't add the macros (BOOST_SYMBOL_EXPORT/BOOST_SYMBOL_IMPORT) for the Windows platform. Regards, Michel

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[unique_ptr] How should I assign unique_ptr returned from a factory function, possibly using boost::move, in C++03
by Adam Romanek 26 Oct '12

26 Oct '12

Hi, the question is: how should I assign boost::interprocess::unique_ptr returned from a factory function, possibly using boost::move, in C++03? Here's an example: --- #include <boost/interprocess/smart_ptr/unique_ptr.hpp> using namespace boost::interprocess; class my_class { public: my_class() {} }; struct my_class_deleter { void operator()(my_class *p) {} }; typedef unique_ptr<my_class, my_class_deleter> uptr; uptr create() { return uptr(); } int main() { uptr x; x = create(); // return 0; } --- The problem is that gcc fails to compile the above code saying: main.cpp:22: error: ambiguous overload for ‘operator=’ in ‘x = create()()’ ../../boost_latest/boost/interprocess/smart_ptr/unique_ptr.hpp:211: note: candidates are: boost::interprocess::unique_ptr<T, D>& boost::interprocess::unique_ptr<T, D>::operator=(boost::rv<boost::interprocess::unique_ptr<T, D> >&) [with T = my_class, D = my_class_deleter] ../../boost_latest/boost/interprocess/smart_ptr/unique_ptr.hpp:249: note: boost::interprocess::unique_ptr<T, D>& boost::interprocess::unique_ptr<T, D>::operator=(int boost::interprocess::unique_ptr<T, D>::nat::*) [with T = my_class, D = my_class_deleter] I use gcc v4.4.3 and Boost v1.51.0. BTW: I posted the same question on StackOverflow: http://stackoverflow.com/questions/13086428/how-should-i-assign-boostinterp…

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Re: [Boost-users] boost wave memory leak
by Hartmut Kaiser 26 Oct '12

26 Oct '12

> I apologize if this is not standard procedure (not quite sure what > that is) but I was wondering if you've been able to reproduce the issue > using the information from my last email. Sorry, I have not had any time to look into this issue. Regards Hartmut --------------- http://boost-spirit.com http://stellar.cct.lsu.edu > > Rob Conde > > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Hartmut Kaiser > Sent: Monday, October 22, 2012 8:00 PM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] boost wave memory leak > > > I'm getting a report of a memory leak when using boost wave. I see a > > similar problem at: > > > > https://svn.boost.org/trac/boost/ticket/4346 > > > > but supposedly that is fixed for a while. > > > > The call stack is: > > How did you get that call stack? What do I need to do to reproduce this > problem? > > Regards Hartmut > --------------- > http://boost-spirit.com > http://stellar.cct.lsu.edu > > > > > > MyDll.dll!operator new(unsigned int count, const std::nothrow_t & > > __formal) > > Line 18 + 0x9 bytes C++ > > > > MyDll.dll!operator new[](unsigned int count, const std::nothrow_t & x) > > Line > > 15 + 0xd bytes C++ > > > > MyDll.dll!boost::default_user_allocator_new_delete::malloc(const > unsigned > > int bytes) Line 97 + 0xe bytes C++ > > > > MyDll.dll!boost::pool<boost::default_user_allocator_new_delete>::mallo > > c_ne > > ed > > _resize() Line 693 + 0x9 bytes C++ > > > > > MyDll.dll!boost::pool<boost::default_user_allocator_new_delete>::malloc() > > Line 432 C++ > > > > MyDll.dll!boost::singleton_pool<boost::fast_pool_allocator_tag,12,boos > > t::d > > ef > > ault_user_allocator_new_delete,boost::mutex,32,0>::malloc() Line 137 > > + 0xb > > bytes C++ > > > > > MyDll.dll!boost::fast_pool_allocator<std::_List_nod<boost::wave::cpplexer: > > :l > > ex_token<boost::wave::util::file_position<boost::wave::util::flex_stri > > ng<c > > ha > > r,std::char_traits<char>,std::allocator<char>,boost::wave::util::CowSt > > ring > > <b > > oost::wave::util::AllocatorStringStorage<char,std::allocator<char> > > >,char *> > > > > > > >,boost::fast_pool_allocator<boost::wave::cpplexer::lex_token<boost::w > > >av > > >e::u > > til::file_position<boost::wave::util::flex_string<char,std::char_trait > > s<ch > > ar > > >,std::allocator<char>,boost::wave::util::CowString<boost::wave::util: > > >:A > > >lloc > > atorStringStorage<char,std::allocator<char> >,char *> > > > > >,boost::default_user_allocator_new_delete,boost::mutex,32,0> > > >::_Node,boost::default_user_allocator_new_delete,boost::mutex,32,0>:: > > >al > > >loca > > te(const unsigned int n) Line 419 + 0xb bytes C++ > > > > MyDll.dll!std::list<boost::wave::cpplexer::lex_token<boost::wave::util > > ::fi > > le > > > _position<boost::wave::util::flex_string<char,std::char_traits<char>,std:: > > al > > locator<char>,boost::wave::util::CowString<boost::wave::util::Allocato > > rStr > > in > > gStorage<char,std::allocator<char> >,char *> > > > > >,boost::fast_pool_allocator<boost::wave::cpplexer::lex_token<boost::w > > >av > > >e::u > > til::file_position<boost::wave::util::flex_string<char,std::char_trait > > s<ch > > ar > > >,std::allocator<char>,boost::wave::util::CowString<boost::wave::util: > > >:A > > >lloc > > atorStringStorage<char,std::allocator<char> >,char *> > > > > >,boost::default_user_allocator_new_delete,boost::mutex,32,0> > > >>::_Buynode() > > Line 1172 + 0x7 bytes C++ > > > > MyDll.dll!std::list<boost::wave::cpplexer::lex_token<boost::wave::util > > ::fi > > le > > > _position<boost::wave::util::flex_string<char,std::char_traits<char>,std:: > > al > > locator<char>,boost::wave::util::CowString<boost::wave::util::Allocato > > rStr > > in > > gStorage<char,std::allocator<char> >,char *> > > > > >,boost::fast_pool_allocator<boost::wave::cpplexer::lex_token<boost::w > > >av > > >e::u > > til::file_position<boost::wave::util::flex_string<char,std::char_trait > > s<ch > > ar > > >,std::allocator<char>,boost::wave::util::CowString<boost::wave::util: > > >:A > > >lloc > > atorStringStorage<char,std::allocator<char> >,char *> > > > > >,boost::default_user_allocator_new_delete,boost::mutex,32,0> > > >::list<boost::wave::cpplexer::lex_token<boost::wave::util::file_posit > > >io > > >n<bo > > ost::wave::util::flex_string<char,std::char_traits<char>,std::allocato > > r<ch > > ar > > >,boost::wave::util::CowString<boost::wave::util::AllocatorStringStora > > >ge > > ><cha > > r,std::allocator<char> >,char *> > > > > >,boost::fast_pool_allocator<boost::wave::cpplexer::lex_token<boost::w > > >av > > >e::u > > til::file_position<boost::wave::util::flex_string<char,std::char_trait > > s<ch > > ar > > >,std::allocator<char>,boost::wave::util::CowString<boost::wave::util: > > >:A > > >lloc > > atorStringStorage<char,std::allocator<char> >,char *> > > > > >,boost::default_user_allocator_new_delete,boost::mutex,32,0> >() Line > > >436 > > + 0x68 bytes C++ > > > > MyDll.dll!`dynamic initializer for > > > 'boost::wave::util::impl::gen_unput_queue_iterator<boost::wave::cpplexer:: > > le > > x_iterator<boost::wave::cpplexer::lex_token<boost::wave::util::file_po > > siti > > on > > <boost::wave::util::flex_string<char,std::char_traits<char>,std::alloc > > ator > > <c > > har>,boost::wave::util::CowString<boost::wave::util::AllocatorStringSt > > har>or > > har>age< > > char,std::allocator<char> >,char *> > > > > > >,boost::wave::cpplexer::lex_token<boost::wave::util::file_position<bo > > >os > > >t::w > > ave::util::flex_string<char,std::char_traits<char>,std::allocator<char > > >,bo > > os > > t::wave::util::CowString<boost::wave::util::AllocatorStringStorage<cha > > r,st > > d: > > :allocator<char> >,char *> > > > > >,std::list<boost::wave::cpplexer::lex_token<boost::wave::util::file_p > > >os > > >itio > > n<boost::wave::util::flex_string<char,std::char_traits<char>,std::allo > > cato > > r< > > char>,boost::wave::util::CowString<boost::wave::util::AllocatorStringS > > char>to > > char>rage > > <char,std::allocator<char> >,char *> > > > > >,boost::fast_pool_allocator<boost::wave::cpplexer::lex_token<boost::w > > >av > > >e::u > > til::file_position<boost::wave::util::flex_string<char,std::char_trait > > s<ch > > ar > > >,std::allocator<char>,boost::wave::util::CowString<boost::wave::util: > > >:A > > >lloc > > atorStringStorage<char,std::allocator<char> >,char *> > > > > >,boost::default_user_allocator_new_delete,boost::mutex,32,0> > > > >>::last''() > > Line 155 + 0x28 bytes C++ > > > > msvcr90d.dll!__initterm() + 0x1c bytes > > > > > > _______________________________________________ > > Boost-users mailing list > > Boost-users(a)lists.boost.org > > http://lists.boost.org/mailman/listinfo.cgi/boost-users > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please visit http://www.symanteccloud.com > ______________________________________________________________________ > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users

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