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Boost compatibility with Green Hills Integrity RTOS and Windows CE
by Vikas Goel 04 Feb '09

04 Feb '09

Hi, I am planning to use Boost libraries with Green Hills Integrity RTOS and Windows CE. Please let me know if there are any known issues (like build, compilation, etc) in running Boost on Green Hills Integrity RTOS and Win CE. Any comment regarding usage of Boost with any other RTOS is also welcome. Thanks & Regards, Vikas **************** CAUTION - Disclaimer ***************** This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful. This e-mail may contain viruses. Infosys has taken every reasonable precaution to minimize this risk, but is not liable for any damage you may sustain as a result of any virus in this e-mail. You should carry out your own virus checks before opening the e-mail or attachment. Infosys reserves the right to monitor and review the content of all messages sent to or from this e-mail address. Messages sent to or from this e-mail address may be stored on the Infosys e-mail system. ***INFOSYS******** End of Disclaimer ********INFOSYS***

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[signals (thread safe)] Scope of slot_call_iterator (or how to implement deferred signals)
by Fabio Fracassi 04 Feb '09

04 Feb '09

Hi, I am currently trying to implement deferred signals using boost signals (well thread safe signals). I had the (crazy?) idea that it might be possible to hijack the combiner interface to do this. The design rational said that during the signal call the state (including the arguments that were passed) are cached for the combiner. So, what I tried to do was to copy and store the first and last iterater out of the combiner, to iterate over them at a later time, to call the slots. What I don't know is whether the slot_call_iterator (and the data it uses ) stays in scope after the signal call (i.e. signal...::operator() ) returns. Here is what I tried: #include <boost/signal.hpp> #include <boost/tr1/memory.hpp> #include <queue> struct signal_queue { signal_queue() : m_signals() {} template <typename InputIterator> void add_signal(InputIterator first, InputIterator last) { m_signals.push( std::tr1::shared_ptr<sig_iterator_range_placeholder>( new sig_iterator_range_holder<InputIterator>(first, last))); } bool process_one_signal() { if (!m_signals.empty()) { std::tr1::shared_ptr<sig_iterator_range_placeholder> sig = m_signals.front(); m_signals.pop(); sig->send(); return true; } return false; } private: struct sig_iterator_range_placeholder { virtual void send() = 0; }; template <typename InputIterator> struct sig_iterator_range_holder : sig_iterator_range_placeholder { sig_iterator_range_holder( InputIterator first, InputIterator last) : m_first( first ), m_last( last ) {} virtual void send () { while (m_first != m_last) { *m_first++; } return; } private: InputIterator m_first; InputIterator m_last; }; std::queue< std::tr1::shared_ptr<sig_iterator_range_placeholder> > m_signals; }; struct defered_send { typedef void result_type; template<typename InputIterator> void operator()(InputIterator first, InputIterator last) const { s_signalQueue.add_signal( first, last ); } static signal_queue s_signalQueue; }; signal_queue defered_send::s_signalQueue = signal_queue(); // Tests struct test_slots { void operator()() const { std::cout << "exec Slot()" << std::endl; } void operator()(int t1, int t2) const { std::cout << "exec Slot(" << t1 << ", " << t2 << ")" << std::endl; } }; int main () { boost::signal<void ( int, int ), defered_send> def_ii; test_slots test; def_ii.connect(test); std::cout << "Send Defered Signals ... " << std::endl; def_ii(42, 24); // <- Point 1 std::cout << "Entering 'event loop' ... " << std::endl; while ( defered_send::s_signalQueue.process_one_signal() ) {} std::cout << "Done." << std::endl << std::flush; return EXIT_SUCCESS; } The good news is that it doesn't crash, though I suspect that this is pure luck. After the slot call (Point 1) some things go out of scope (most notably the cache variable in slot_call_iterator). Now to make a long story short. Is what I am trying to do possible? If not should it? Or do I have to find another way to achive this? If so does someone have a hint? Regards Fabio

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Re: [Boost-users] Transferring files across a network.
by Andrew Maclean 04 Feb '09

04 Feb '09

To all those who helped, especially Rahul who very kindly made some sample code available and put me on the right track. I now have a client and a server that can handle multiple files being sent over the network. The files are attached for your interest. If anyone can improve them I really will welcome their comments. If there is a need, it is Ok to include them as examples in the ASIO documentation. I have no issues with this. Thanks once again to everyone who helped. Regards Andrew

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Problem transforming a vector<bool> to a vector<any>
by Fabrice_CBA 04 Feb '09

04 Feb '09

Hi everyone, I am working on a project in which I'm using a "simplified" version of the boost::any library. By simplified, I mean that I got rid of the #defines and made it independent from the rest of boost. The changes are very small, and in my opinion shouldn't impact much the class, since the general structure is still there. My implementation is attached to this message. http://www.nabble.com/file/p21822878/Any.h Any.h However I am having a problem transferring a vector<bool> into a vector<any>. It works for any other types I've tested, only booleans fail. Here is an example: std::vector<std::string> source0(1, "SomeString"); std::vector<long> source1(1, 666); std::vector<bool> source2(1, true); std::vector<double> source3(1, 6.66); std::vector<any> destination; destination.push_back(source0[0]); destination.push_back(source1[0]); destination.push_back(source2[0]); destination.push_back(source3[0]); When checking what is in destination[2], it seems it only holds {...}, and not the original {true}. Whereas it works perfectly for the other values. Any idea on what I'm doing wrong? Any help appreciated. Thanks, Fabrice -- View this message in context: http://www.nabble.com/Problem-transforming-a-vector%3Cbool%3E-to-a-vector%3… Sent from the Boost - Users mailing list archive at Nabble.com.

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How to convert boost::posix_time::ptime to FILETIME structure?
by Archie14 03 Feb '09

03 Feb '09

Is there any helper function to convert boost::posix_time::ptime to FILETIME? I am trying to pass datetime value from boost-based app to another (C#). Looks like that FILETIME (that can be represented as long) is a good option, besides string. May be there is better alternative?

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Nullary metafunction
by er 03 Feb '09

03 Feb '09

Hi All, I'm looking for template<typename> class F such that F<T>::type is T::type if it exists, T itself otherwise. I was hoping apply<T>::type would work, by analogy with the well known example apply<std::vector<_>,X>::type, but apparently not.

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Thread locks
by Larry E. Ramey 03 Feb '09

03 Feb '09

Under 1.33.1 we used to do this: boost::try_mutex::scoped_try_lock lock(m_mutex); if (lock.locked() && m_threadState == UploadMap) { I'm not sure, but I think under 1.37 I should do: boost::try_mutex::scoped_try_lock lock(m_mutex); if (lock.owns_lock() && m_threadState == UploadMap) { When I do that, I get a crash when I exit that I never used to have. Any ideas? Larry

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[boost-users][lambda] crash in std::for_each
by Igor R 03 Feb '09

03 Feb '09

The following code crashes in for_each when trying to output the 1st pair. What's wrong with it? Thanks! namespace bl = boost::lambda; std::map<std::string, std::string> temp; temp["a"] = "1"; temp["b"] = "2"; const std::map<std::string, std::string> attrs(temp); typedef std::pair<std::string, std::string> string_pair; std::stringstream stream; std::for_each(attrs.begin(), attrs.end(), stream << bl::bind(&string_pair::first, bl::_1) << bl::bind(&string_pair::second, bl::_1));

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[asio] Cloning a WSA socket (windows)
by Tore Halvorsen 03 Feb '09

03 Feb '09

Hi, I am trying to clone a socket from process to another, mostly for having one process per client in a network server. Some legacy stuff makes this the only design possible, so the threaded approach is simply not feasible... Anyway, when I'm trying to create a boost socket from a cloned WSA socket I get an exception. class boost::exception_detail::clone_impl< struct boost::exception_detail::error_info_injector< class boost::system::system_error > > : The parameter is incorrect This same happens for this example program, using boost 1.37 Does anyone have an idea why this does not work? #ifndef _WIN32_WINNT #define _WIN32_WINNT 0x0501 #endif #define WIN32_LEAN_AND_MEAN #define NOMINMAX #include <windows.h> #include <winsock2.h> #pragma comment(lib, "ws2_32") #include <boost/asio.hpp> namespace ip = boost::asio::ip; int main_impl(int argc, char* argv[]) { boost::asio::io_service ios; ip::tcp::socket s(ios); ip::tcp::acceptor a(ios, ip::tcp::endpoint(ip::tcp::v4(), 1777)); a.accept(s); WSAPROTOCOL_INFO info; if (WSADuplicateSocket(s.native(), GetCurrentProcessId(), &info)) { std::cerr << "WSAError: " << WSAGetLastError() << std::endl; return EXIT_FAILURE; } // pass info over a pipe to the client... SOCKET copy(WSASocket(FROM_PROTOCOL_INFO, FROM_PROTOCOL_INFO , FROM_PROTOCOL_INFO, &info, NULL, NULL)); ip::tcp::socket scopy(ios, ip::tcp::v4(), copy); return EXIT_SUCCESS; } int main(int argc, char* argv[]) { try { return main_impl(argc, argv); } catch(std::exception const& ex) { std::cerr << typeid(ex).name() << ":" << ex.what() << std::endl; return EXIT_FAILURE; } } -- Eld på åren og sol på eng gjer mannen fegen og fjåg. [Jøtul] <demo> 2009 Tore Halvorsen || +052 0553034554

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[mpi] Non-default arguments for running regression tests through bjam
by Pete Bartlett 03 Feb '09

03 Feb '09

Dear Boosters, I am just going through the learning curve for Boost.MPI. My underlying target platform is MPICH2 on Windows XP/Vista. Given I am taking baby-steps I would like run the regression tests to check my install. Mpirun doesn't exist in my install - mpiexec is required instead. The docs and mpi.jam comments say "The (optional) fourth argument configures Boost.MPI for running regression tests. These parameters specify the executable used to launch jobs (default: "mpirun") followed by any necessary arguments to this to run tests and tell the program to expect the number of processors to follow (default: "-np")." I'm no jam expert, but that suggests that my user-config.jam should change to using mpi : : <find-shared-library>cxx <find-shared-library>mpi <library-path>C:/MPICH2/lib <include>C:/MPICH2/include : : mpiexec -n ; where the " : : mpiexec -n " is the new part. However this results in a slew of jam errors. I am able to run the regression tests by hacking mpi.jam to change the defaults, however I'd prefer to know the correct syntax in user-config.jam please. Thanks in advance for any help, Pete Bartlett

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