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Wrong header in libs/iostreams/src/file_times.cpp
by Mathieu Peyréga 08 Aug '08

08 Aug '08

In 48033 SVN : libs/iostreams/src/file_times.cpp #include <ctime> #include <boost/iostreams/detail/config/windows_posix.hpp> #include <boost/iostreams/detail/file_times.hpp> #include <boost/iostreams/detail/system_failure.hpp> should now be (I guess there was some file renaming) #include <ctime> #include <boost/iostreams/detail/config/windows_posix.hpp> #include <boost/iostreams/detail/file_handle.hpp> #include <boost/iostreams/detail/system_failure.hpp> otherwise iostreams libs do not compile.... regards, Mathieu -- http://www.incub.net/

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[spirit] finish parser from actor
by piotr270977＠interia.pl 08 Aug '08

08 Aug '08

Hi All I have to finish parser with error from actor. Is it possible ? for example: rule<> r = (int_p[do_push] >> *('.' >> int_p[do_push])) [do_act] | ................... | ................... ; How to stop parsing in do_act function and exit parser with error pronounce in parse_info<> ? ---------------------------------------------------------------------- Taniej na zagraniczne komorki! Sprawdz >>> http://link.interia.pl/f1ece

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File Handling
by Ankur Srivastava 08 Aug '08

08 Aug '08

Hi All, I am new to the boost library. I was trying to handle file operation using boost like.. 1- Create a file. 2- Open a file in different modes. 3- Read/write operations on the file with special international character support. I was wondering if anyone have any sample code for the same problem. Please reply at the earliest. Thanks, Ankur

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boost program options - notifier function 0 arguments
by Aljaz 08 Aug '08

08 Aug '08

Hello I've been wondering how its possible to call a notifier function with an option that doesnt require arguments. Something like: po::options_description desc("Allowed options"); desc.add_options() ("help", po::value<>()->notifier(&_help_function), "produce help message"); Whats the proper way of doing this? Many thanks in advance Aljaz

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too many arguments to function ‘boost::fusion::vector
by Peng Yu 08 Aug '08

08 Aug '08

Hi, I got the following error, when I try to define a boost::fusion::vector of many elements. Can somebody let me know how to increase the limit of the number of elements? Thanks, Peng /usr/include/boost/fusion/container/generation/make_vector.hpp|40| error: too many arguments to function 'boost::fusion::vector<boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_, boost::fusion::void_> boost::fusion::make_vector()'

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Re: [Boost-users] [boost-users] crash of visual studio compiler with boost bind
by Alan M. Carroll 08 Aug '08

08 Aug '08

Shouldn't that _2 be _1? Otherwise, isn't the third argument to the outer bind a binary functor? If so, could that syntax error be the cause of the crash? At 03:59 AM 8/7/2008, you wrote: >Hello, >the following code makes the VC++ compiler (VS 2005) crash, >but only when I am trying a release build ! The debug builds work fine. > >std::sort(l_vec.begin(),l_vec.end(),boost::bind(std::less<int>(),boost::bind(&CLayer::GetPrio,_1),boost::bind(&CLayer::GetPrio,_2)));

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[graph] Is there a way to detect circles in graphs using boost?
by Martin Mann 07 Aug '08

07 Aug '08

Hi, I would like to know if there is an easy/straight-forward way to get all circles of a graph using the boost::graph facilities? And if so where to look or how to do? Thanks a lot, Martin

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[Boost.thread] Simultaneously starting thread execution
by Ruediger Berlich 07 Aug '08

07 Aug '08

Hi there, I'm trying to find a way to let a number of threads start execution simultaneously, and in any case not before a certain condition has come true. I would also like to terminate them within a relatively short time frame. I can not use the Boost.Thread barrier class, as I do not know the number of threads in advance (users register consumer-type objects, and I do not know how many there will be). I also believe I do not have to use a condition variable, as the different threads need to synchronize their access to a data ressource anyway, and I can use the same mutex to block them in the beginning. I have thus come up with something like the code quoted below. Are there easier ways to do this with the Boost.Thread library ? One of the problems (which seems to be unrelated to the code below) is that the three threads do not get called equally often. In one run, one thread was called 14564 times, another 1607 times and the third one 8676 times. Thanks and Best Regards, Ruediger /***********************************************************************/ #include <iostream> #include <boost/cstdint.hpp> #include <boost/bind.hpp> #include <boost/thread/mutex.hpp> #include <boost/thread/condition.hpp> #include <boost/thread/condition_variable.hpp> #include <boost/thread/thread.hpp> using namespace std; class test { public: test() :lock(helloMutex_), jointData_(0), MAXJOINTDATA(10000), thread1(boost::bind(&test::sayHello, this)), thread2(boost::bind(&test::sayHello, this)), thread3(boost::bind(&test::sayHello, this)) { /* nothing */ } void startAndStopThreads(){ lock.unlock(); while(true){ boost::unique_lock<boost::mutex> local_lock(helloMutex_); if(jointData_ >= MAXJOINTDATA){ thread1.interrupt(); thread2.interrupt(); thread3.interrupt(); break; } } thread1.join(); thread2.join(); thread3.join(); } void sayHello(){ for(;;){ if(boost::this_thread::interruption_requested()) break; boost::unique_lock<boost::mutex> local_lock(helloMutex_); std::cout << "Hello world Nr. " << jointData_++ << " from thread " << boost::this_thread::get_id() << std::endl; } } private: boost::mutex helloMutex_; boost::unique_lock<boost::mutex> lock; uint32_t jointData_; const uint32_t MAXJOINTDATA; boost::thread thread1, thread2, thread3; }; main(){ test Test; Test.startAndStopThreads(); std::cout << "Done ..." << std::endl; }

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How to get the port number and the address of a boost::asio::ip::tcp:acceptor object
by Jean-Sebastien Stoezel 07 Aug '08

07 Aug '08

Hi, How to get the port number and ip address of an acceptor? I tried this: boost::asio::ip::tcp::acceptor acceptor(m_IoService); boost::asio::ip::tcp::acceptor myEndPoint(m_IoService); acceptor.get_option(myEndPoint); But this does not compile, Iget a couple of errors in win_iocp_socket_service.hpp like this one: Error 8 error C2039: 'level' : is not a member of 'boost::asio::basic_socket_acceptor<Protocol>' Thanks, Jean

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[filesystem] strange linker error
by Matthias Schabel 07 Aug '08

07 Aug '08

Using the 1.36 beta libs on OS X and linking to libboost_system- gcc40-1_36.a and libboost_filesystem-gcc40-1_36.a I get : "boost::system::error_code::message() const", referenced from: boost::system::system_error::what() constin main_mpi.o boost ::filesystem ::basic_filesystem_error <boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >::what() constin main_mpi.o ld: symbol(s) not found Any ideas what I'm doing wrong here? Matthias

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