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shared_ptr on aix
by Vojtech Fried 30 Oct '12

30 Oct '12

Hi, What is the status of boost/smart_ptr/detail/sp_counted_base_aix.hpp? It is not #included by default in sp_counted_base_aix.hpp. Is it safe to use or is it just an exprerimental version? We have a multiplatform application and I am trying to make some improvements for it on AIX platform. One candidate right now is to utilize sp_counted_base_aix.hpp (boost/smart_ptr/detail/sp_counted_base_aix.hpp). It implements atomic counter without (pthread) mutexes. Using it improves performance of our app up to 10%. But sp_counted_base_aix.hpp is not used by default. I had to add an #ifed to sp_counted_base.hpp to make it work. I tested the implementation with a small sample program that copied and removed shared_ptrs in multiple threads and it works. But I am still concerned. How widely is this AIX specific implementation used? How risky is it for us to use it? Best regards Vojtech

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Boost.Test ordering
by John M. Dlugosz 30 Oct '12

30 Oct '12

If I make unit tests in different source files, I need to declare a BOOST_AUTO_TEST_SUITE in each one, right? At link time, these appear in some undetermined order. How can I cause them to be run in the desired order instead? —John

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boost::container::vector fails to compile with C++03 compiler
by mark pashley 30 Oct '12

30 Oct '12

The following example compiles fine when using GCC 4.4.6 with the --std=c++0x flag but fails to compile in C++03 mode. #include <stdint.h> #include <boost/container/vector.hpp> struct data { int i_; boost::container::vector<data> v_; }; int main( int argc, char** argv ) { data myData; myData.i_ = 10; data myData2; myData2.i_ = 30; myData.v_.push_back( myData2 ); return 0; } It compiles successfully with g++ --std=c++0x test-cont.cpp However if I remove the --std=c++0x I get the following errors: g++ test-cont.cpp In file included from include/c++/4.4.6/memory:49, boost/container/container_fwd.hpp:36, boost/container/vector.hpp:20, from test-cont.cpp:2: include/c++/4.4.6/bits/stl_algobase.h: In static member function static _OI std::__copy_move<false, false, std::random_access_iterator_tag>:: __copy_m(_II, _II, _OI) [with _II = boost::container::constant_iterator<data, long int>, _OI = data*]: include/c++/4.4.6/bits/stl_algobase.h:397: instantiated from _OI std::__copy_move_a(_II, _II, _OI) [with bool _IsMove = false, _II = boost::container::constant_iterator<data, long int>, _OI = data*] include/c++/4.4.6/bits/stl_algobase.h:436: instantiated from _OI std::__copy_move_a2(_II, _II, _OI) [with bool _IsMove = false, _II = boost::container::constant_iterator<data, long int>, _OI = data*] include/c++/4.4.6/bits/stl_algobase.h:468: instantiated from _OI std::copy(_II, _II, _OI) [with _II = boost::container::constant_iterator<data, long int>, _OI = data*] boost/move/move.hpp:1147: instantiated from boost::copy_or_move(I, I, F, typename boost::move_detail::disable_if< boost::move_detail::is_move_iterator, void>::type*) [with I = boost::container::constant_iterator<data, long int>, F = data*] boost/container/detail/advanced_insert_int.hpp:58: instantiated from void boost::container::container_detail::advanced_insert_aux_proxy<A, FwdIt, Iterator>::copy_remaining_to(Iterator) [with A = std::allocator<data>, FwdIt = boost::container::constant_iterator<data, long int>, Iterator = data*] test-cont.cpp:21: instantiated from here include/c++/4.4.6/bits/stl_algobase.h:343: error: no match for operator= in * __result = __first.boost::container::constant_iterator<T, Difference>::operator* [with T = data, Difference = long int]() test-cont.cpp:5: note: candidates are: data& data::operator=(data&) It looks like boost::container::vector requires move semantics which I assumed would automatically use boost::move when compiled with a c++03 compiler. If I manually modify the struct data to define: a default constructor a copy constructor an assignment operator an emulated move constructor using BOOST_RV_REF an emulated move assignment operator using BOOST_RV_REF The example compiles. Having to manually add these move/copy constructors and assignment operators for C++03 is laborious. Is this a bug with boost::container? -- View this message in context: http://boost.2283326.n4.nabble.com/boost-container-vector-fails-to-compile-… Sent from the Boost - Users mailing list archive at Nabble.com.

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Visual Studio Debugger "renderer" support for Boost.Container ?
by John M. Dlugosz 29 Oct '12

29 Oct '12

MS Visual Studio's Debugger comes pre-loaded with "renderers" (I forget what S.T.L. actually called them) for the containers and smart pointers supplied with the compiler. Looking at a Boost Container in the debugger is not nearly so nice. Has anyone looked into adding renderers for them?

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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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