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Main thread not exiting
by developer1 31 Oct '08

31 Oct '08

Hi, I have created a thread pool library which maintains a worker thread queue and a work queue. Any Application class using this library passes functors to ThreadPool. I am using a ThreadGroup to manage all threads. I use the thread_group.join_all(), to wait for all threads to finish before the main thread exits. But on joining the threads in the thread_group, the main thread fails to exit. Am i missing something. -- View this message in context: http://www.nabble.com/Main-thread-not-exiting-tp20264225p20264225.html Sent from the Boost - Users mailing list archive at Nabble.com.

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How to find: best integer type for processor
by Daryle Walker 31 Oct '08

31 Oct '08

Is there a macro and/or typedef that will tell me bit-length used for a processor and/or the best integer type for said processor? The "int" type is supposed to be that type, and it was in the 16- and 32- bit eras. (I learned C programming with the former in the... early 1990s!) However, the powers-that-be decided, for "backwards compatibility," to freeze "int" and "long" at 32 bits and use a new type, "long long," for 64 bits, which should be the optimized integer type for 64-bit processors. (If they kept to the plan, "int" would be 64 bits, "long" either 64 or 128, "short" up to 32, and the new type will be "short short" at 16.) I want to know the best type so, when I build multi-integer arrays for various purposes, I don't pick an element type that causes a slow down, whether to focus on a fraction of a register (if the chosen type is too small) to handle two registers at once (if the chosen type is too large). -- Daryle Walker Mac, Internet, and Video Game Junkie darylew AT hotmail DOT com

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[multi-index] Container of polymorphic pointers
by Daniel Dilts 31 Oct '08

31 Oct '08

I'm am using boost::multi_index to hold a set of polymorphic entities. Due to efficiency concerns, I have to be able sort the container based on actual type. I was planning on sorting based on the return result of typeid. When I try this I get errors in <functional>. I am using VC++ 2005 Standard Edition SP1. What am I doing wrong, or, what is a better way of accomplishing what I am trying to do? #ifndef ENTITIES_ENTITYCONTAINER_H_ #define ENTITIES_ENTITYCONTAINER_H_ #include <boost/multi_index_container.hpp> #include <boost/multi_index/ordered_index.hpp> #include "Entity.h" namespace Entities { struct type{}; struct extractType { typedef const type_info& result_type; result_type operator()(const Entity * r)const // operator() must be const { return typeid(*r); } }; typedef boost::multi_index::multi_index_container< Entity *, boost::multi_index::indexed_by< boost::multi_index::ordered_non_unique<boost::multi_index::tag<type>, extractType> > > EntityContainer; }; #endif

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warning C4005: 'AF_IPX' : macro redefinition" +"ws2def.h" (converting from MS 6.0 to MS 2008 (9.0))
by Joseph Marks 30 Oct '08

30 Oct '08

RE: http://lists.boost.org/boost-users/2007/11/31965.php I don't see any public answer to this. What is the best solution. On another site, someone recommended: #define WIN32_LEAN_AND_MEAN And/or #define _WINSOCKAPI_ However, this solution did not work for me. Has anyone solved this problem? Thanks in Advance, Joseph [brand new to this list] The preceding e-mail message (including any attachments) contains information that may be confidential, or constitute non-public information. It is intended only for the designated recipient. If you are not the named addressee, you should not disseminate, distribute or copy this e-mail. If you have received this e-mail by mistake, please notify the sender immediately by replying to this message and delete this e-mail from your system. Use, dissemination, distribution or reproduction of this message by unintended recipients is not authorized and may be unlawful.

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Problem linking boost filesystem 1_36_0 on ubuntu gcc 4.2
by Kevin Stevens 30 Oct '08

30 Oct '08

Hello, when I am trying to link boost::filesystem into my program I am receiving link errors. I am trying to convert from boost 1_34_1 to 1_36_0- previously this built against 1_34_1 without any issue. When I link I get the following error: /home/kstevens/code/CrossingEngine/../lib/libtypes.a(Config_Constants.o): In function `boost::enable_if<boost::filesystem::is_basic_path<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >, bool>::type boost::filesystem::exists<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >(boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> const&)': /usr/include/boost/filesystem/operations.hpp:279: undefined reference to `boost::filesystem::detail::status_api(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int&)' I did an objdump -CT on libboost_filesystem-gcc42-mt-1_36.so and got the following two functions as output but not the one the linker appears to be looking for: 000000000000c4e0 g DF .text 00000000000000e3 Base boost::filesystem::detail::status_api(std::string const&, boost::system::error_code&) 000000000000c720 g DF .text 00000000000000e3 Base boost::filesystem::detail::symlink_status_api(std::string const&, boost::system::error_code&) Could this be a bad build? Am I missing something- perhaps I need to link another file in? I built 1_36_0 myself using a default configuration other than telling it where to put the output libs. I have ensured that I am linking against and including headers from 1_36_0, and have also made a clean build. Is there anything else I should try? Thank you, -Kevin This is my code snippet that uses boost::filesystem: //Create Directory if it does not already exist. if(!boost::filesystem::exists(reportFilePath)) { cout << "output path: " << reportFilePath << " did not exist, which may indicate a different configuration than was intended, creating directory now." << endl; try { boost::filesystem::path path(reportFilePath); boost::filesystem::create_directory(path); } catch(boost::filesystem::filesystem_error e) { cout << "Error: " << e.what() << endl; } }

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non-greedy regex
by Jeff Anderson 30 Oct '08

30 Oct '08

Hello, I'm using boost's regex for a school project (they encourage us to use boost) Boost 1.34 is what is available on the school computers (unless fedora 9 promotes a newer version out of testing before Tuesday.) I'm trying to use a non-greedy quantifier in a regex. Here is an example from my code: string input=string("/blog/2008/../"); string expr=string("/.*?/\\.\\./"); string replacement=string("/"); std::ostringstream stream(std::ios::out | std::ios::binary); std::ostream_iterator<char, char> stream_iterator(stream); boost::regex pattern(expr, boost::regex::perl); boost::regex_replace(stream_iterator, input.begin(), input.end(), pattern, replacement, boost::match_default | boost::format_all); string result=stream.str(); The expected output is "/blog/". I am getting "/". I've played with different arguments to the boost::regex constructor, but I can't seem to get it to output a correct result. I did notice that in the notes for the boost regex library in 1.34 that there was a bug fixed related to non-greedy quantifiers, so I'm fairly confident that I just have a problem with my own code. A tarball can be provided with a "ready-to-compile" example snippet and test case. Then again, it could just as likely be a problem with the regular expression itself, though I checked, re-checked, and double checked that this is the correct syntax for the perl mode in the boost regex library. Thanks for any input! Jeff Anderson

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boost + stlport : Failed to specialize function template
by gatotkaca 30 Oct '08

30 Oct '08

Hello! I'm trying to compile following code (msvc8 + boost1.36.0 + stlport5.1.7) #include <boost/range/size.hpp> #include <iostream> #include <vector> template< class InputRng, class T > inline T accumulate( const InputRng& r, T init ) { return std::accumulate( boost::begin(r), boost::end(r), init ); } template <typename Range> typename boost::range_iterator<Range>::type::value_type mean(const Range &range, typename boost::range_iterator<Range>::type::value_type init= #ifndef BOOST_MSVC typename #endif boost::range_iterator<Range>::type::value_type()) { return typename boost::range_iterator<Range>::type::value_type( boost::accumulate(range, init)/boost::size(range)); } int main(){ std::cout << "test" << std::endl; std::vector<double> data; data.push_back(1); data.push_back(2); data.push_back(3); double m = mean(data); std::cout << m << std::endl; return 0; } It keeps giving me: error C2893: Failed to specialize function template 'boost::range_iterator<C>::type::value_type mean(const Range &,boost::range_iterator<C>::type::value_type)' ..\my works\misc\mean_range_test\testapp.cpp 35 BUT, if I remove the dependency to the STLport (and use MSVC's STL), it works fine! Unfortunately, I need this STLport to work on. I really appreciate for any helps. Thank you! Best, Dio -- View this message in context: http://www.nabble.com/boost-%2B-stlport-%3A-Failed-to-specialize-function-t… Sent from the Boost - Users mailing list archive at Nabble.com.

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Installing Boost.MPI [bjam]
by Raymond Wan 30 Oct '08

30 Oct '08

Hi all, I need some help with building Boost.MPI. My system is a Debian testing (lenny) system and I'm following the instructions at [lenny uses 1.35 and not 1.36]: http://www.boost.org/doc/libs/1_35_0/doc/html/mpi/getting_started.html I'm using Open MPI and I can compile and run the test implementation fine (mpi-test.cpp). So, I moved to the next step on configuring and building. My bjam is 3.1.16. I copied user-config.jam to my home directory, with the line "using mpi ;" added at the end. Then, I ran "bjam --with-mpi" in the "top-level Boost directory" [*] and I get this error: error: no Jamfile in current directory found, and no target references specified. Firstly, I'm not sure if I have everything installed... But I also don't know what the "top-level Boost directory" is. I've tried these locations: /usr/share/boost-build/ /usr/share/boost-build/build/ /usr/share/boost-build/tools/ [it had an mpi.jam file in it] /usr/include/boost/ And also replaced "using mpi ;" with "using mpi : /usr/bin/mpic++ ;". I'm currently trying this as root user, so I don't think root privileges is the problem. (bjam came with a "Hello World" example and that compiled fine; so I don't think it's something wrong with bjam.) Any help would be appreciated... Thanks! Ray

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bind for_each and a range of functors
by Michael Marcin 30 Oct '08

30 Oct '08

Let's say I have a std::list of a functor with a member function virtual operator()( int, int ) Is there an easy way to call each function in this list using for_each? Intuitively I'd expect to be able to do something like: void call_each( std::list<functor>& l ) { std::for_each( l.begin(), l.end(), boost::bind(_1,5,20) ); } Thanks -- Michael Marcin

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Question about Protocols and boost::asio::ip::tcp::iostream
by Charles Milutinovic 30 Oct '08

30 Oct '08

I am trying to put together a program that needs a very simple networking component, esentially just dumping a lot of data from iostreams into a socket, unformatted, and tcp::iostream looked perfect for it. I have a question about its usage though. Every example I've seen looks something like tcp::iostream s("server", "protocol"). So far I've seen "http" and "daytime" as protocols. I am wondering exactly where these constants are defined. Also, for my purposes, how hard would it be to extend a previously defined protocol (i.e. telnet) since all I really need to do is connect to a port of my choosing and dump data.

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