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[asio] Assertion failed at run time
by Sawe Sun 25 Jun '07

25 Jun '07

Hi,I'm new to boost and asio. I'm trying to use the ssl support of asio in a simple client.This is the code that i'm using to connect to the server: boost::asio::io_service io_service; boost::asio::ssl::context * ctx; boost::asio::ssl::stream<boost::asio::ip::tcp::socket> * socket; boost::asio::error Error; boost::asio::ip::tcp::resolver resolver(io_service); boost::asio::ip::tcp::resolver::query query(boost::asio::ip::tcp::v4(),hostname,port ); boost::asio::ip::tcp::resolver::iterator endpoint_iterator = resolver.resolve(query,boost::asio::assign_error(Error)); boost::asio::ip::tcp::resolver::iterator end; if(Error) return false; ctx = new boost::asio::ssl::context(io_service, boost::asio::ssl::context::sslv23); boost::asio::ip::tcp::endpoint endpoint = *endpoint_iterator; socket = new boost::asio::ssl::stream<boost::asio::ip::tcp::socket>(io_service,*ctx); Error = boost::asio::error::host_not_found; while (Error && endpoint_iterator != end) { socket->lowest_layer().close(); socket->lowest_layer().connect(endpoint,boost::asio::assign_error(Error)); } if (Error) return false; socket->handshake(boost::asio::ssl::stream_base::client,boost::asio::assign_error(Error)); if (Error) return false; else return true;That compiles fine but at run time i have this assertion exception:Assertion failed!Program:... //it is written like thatFile: (PATH)\boost-1_33_1\...\shared_ptr.hLine: 253Expression: px != 0I'm using vs2005. i can't see what is happening because evenif i'm using the "Step Into new Instance" mode to run the program in debug mode, the exception is fired before any step. This is the call stack: msvcr80d.dll!_wassert(const wchar_t * expr=0x0093888c, const wchar_t * filename=0x009388a0, unsigned int lineno=253) Line 384 C CTest.exe!boost::shared_ptr<boost::asio::ssl::detail::openssl_init<1>::do_init>::operator->() Line 253 + 0x1f bytes C++ CTest.exe!boost::asio::ssl::detail::openssl_init<1>::do_init::openssl_locking_func(int mode=5, int n=16, const char * file=0x009401dc, int line=271) Line 83 + 0x37 bytes C++ CTest.exe!_CRYPTO_lock() + 0x81 bytes C CTest.exe!_ssl_load_ciphers() + 0x113 bytes C CTest.exe!_SSL_COMP_get_compression_methods() + 0x5 bytes C CTest.exe!_SSL_library_init() + 0x129 bytes C CTest.exe!boost::asio::ssl::detail::openssl_init<1>::do_init::do_init() Line 57 C++ CTest.exe!boost::asio::ssl::detail::openssl_init<1>::do_init::instance() Line 74 + 0x4a bytes C++ CTest.exe!boost::asio::ssl::detail::openssl_init<1>::openssl_init<1>() Line 96 + 0x5a bytes C++ CTest.exe!`dynamic initializer for 'boost::asio::ssl::detail::openssl_init<1>::instance_''() Line 69 + 0x28 bytes C++ msvcr80d.dll!_initterm(void (void)* * pfbegin=0x00937234, void (void)* * pfend=0x00937f0c) Line 855 C CTest.exe!__tmainCRTStartup() Line 501 + 0xf bytes C CTest.exe!WinMainCRTStartup() Line 403 C kernel32.dll!7c816ff7() [Frames below may be incorrect and/or missing, no symbols loaded for kernel32.dll] CTest.exe!boost::asio::ip::basic_endpoint<boost::asio::ip::tcp>::basic_endpoint<boost::asio::ip::tcp>(const boost::asio::ip::address & addr={...}, unsigned short port_num=111) Line 155 + 0x21 bytes C++ CTest.exe!boost::asio::ip::basic_endpoint<boost::asio::ip::tcp>::basic_endpoint<boost::asio::ip::tcp>(const boost::asio::ip::address & addr={...}, unsigned short port_num=115) Line 155 + 0x21 bytes C++ CTest.exe!boost::asio::ip::basic_endpoint<boost::asio::ip::tcp>::basic_endpoint<boost::asio::ip::tcp>(const boost::asio::ip::address & addr={...}, unsigned short port_num=111) Line 155 + 0x42 bytes C++ CTest.exe!boost::asio::ip::basic_endpoint<boost::asio::ip::tcp>::basic_endpoint<boost::asio::ip::tcp>(const boost::asio::ip::address & addr={...}, unsigned short port_num=54) Line 155 + 0x21 bytes C++ CTest.exe!wxFileName::Assign(const wxFileName & filepath={...}) Line 310 C++ CTest.exe!boost::asio::ip::basic_endpoint<boost::asio::ip::tcp>::basic_endpoint<boost::asio::ip::tcp>(const boost::asio::ip::address & addr={...}, unsigned short port_num=111) Line 155 + 0x42 bytes C++ CTest.exe!boost::asio::ip::basic_endpoint<boost::asio::ip::tcp>::basic_endpoint<boost::asio::ip::tcp>(const boost::asio::ip::address & addr={...}, unsigned short port_num=54) Line 155 + 0x21 bytes C++ CTest.exe!wxFileName::Assign(const wxFileName & filepath={...}) Line 310 C++ CTest.exe!boost::asio::ip::basic_endpoint<boost::asio::ip::tcp>::basic_endpoint<boost::asio::ip::tcp>(const boost::asio::ip::address & addr={...}, unsigned short port_num=57) Line 155 + 0x42 bytes C++ CTest.exe!_RSA_padding_check_PKCS1_type_1() + 0xf2 bytes C CTest.exe!boost::asio::ip::basic_endpoint<boost::asio::ip::tcp>::basic_endpoint<boost::asio::ip::tcp>(const boost::asio::ip::address & addr={...}, unsigned short port_num=897) Line 155 + 0x21 bytes C++ 02840448() dbghelp.dll!03020004() Can somebody tell me what i'm doing wrong?Thanks _________________________________________________________________ David Guetta a réuni les sons les plus connus de Messenger dans le Mix Messenger, le son de l’été ! Téléchargez-le gratuitement ! http://specials.divertissements.fr.msn.com/mixmessenger

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[program_options] bad_any_cast problem with strings in variables_map
by Jeffrey Schmidt 25 Jun '07

25 Jun '07

(apologies if this comes through multiple times, I'm having subscription issues) I'm a novice Boost user attempting to use program_options. As far as I can tell from the docs and sample code, this should work (only relevant code included): po::options_description desc("Allowed options"); desc.add_options() ("client", po::value<string>(), "set client name") ("test", "tool test mode, dump command line options only") ; po::variables_map vm; po::store(po::parse_command_line(ac, av, desc), vm); po::notify(vm); if (vm.count("test")) { if (vm.count("client")) cout << "client set to " << vm["client"].as<string>() << "\n"; else cout << "client not set\n"; } However, when I run with "--client testclient --test", the as<string> call generates a bad_any_cast exception. What am I missing or misunderstanding? -- Jeffrey Schmidt, senior software architect MultiAd(r) Creator and Creator Server jschmidt(a)multiad.com

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Question
by question boost 25 Jun '07

25 Jun '07

Hi, using Code Blocks i get the folowing message. ld.exe "Cannot find -lboost_filesystem-mgw-mt-s-l_33_l" How and where can I get this file? Thank You _________________________________________________________________ David Guetta a réuni les sons les plus connus de Messenger dans le Mix Messenger, le son de l’été ! Téléchargez-le gratuitement ! http://specials.divertissements.fr.msn.com/mixmessenger

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Sunpro CC 5.8, -library=stlport4, multi_index, one last time
by Benson Margulies 25 Jun '07

25 Jun '07

I beg the indulgence of the maintainers to clarify the support intentions here and then I'll go back to my cave. The facts are: 1) The regression tests run reasonably on CC 5.8, with or without -library=stlport4 2) I have a seemingly simple example of using multi_index that won't compile with CC 5.8 unless I'm using -library=stlport4. The compile error, for what it's worth, does not point to one of the weaknesses of the 'old Sun STL' in any obvious way. But it could easily be that some ifdef that is trying to compensate for the old STL is in turn creating the conditions for the failure. (I'm not entirely sure about #1.) The question is: "Is it the intention of the maintainers to support CC 5.8 without -library=stlport4?" If the answer is 'yes', then I will nudge to get this case included in the regression, and I will invest some time in trying to unscrew the inscrutable error. If the answer is 'no', then I will concentrate on moving our Apatosaurus of a code-base to getting itself compiled with -library=stlport4 as soon as I can, and defer use of boost until that can accomplish itself.

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tokenizer
by david bautista garcia 25 Jun '07

25 Jun '07

Hello: somebody can say me that it makes this code, mainly the option : sep (: , "", boost:: keep_empty_tokens) typedef boost::tokenizer<boost::char_separator<char> > tokenizer; boost::char_separator<char> sep(":", "", boost::keep_empty_tokens); tokenizer tokens(str, sep); tokenizer::iterator tok_iter = tokens.begin(); //cout << "TOKEN " << (*tok_iter) << endl; the input is: BSIC=4-6,BCCHFREQ=784,SYSID=DCS1800,MSTXPMAXGSM=<NULL>,MSTXPMAXDCS=0,MSTXPMAXPCS=<NULL>,CELLGLID="214"-"03"-6004-1519,RACODE=137,RACOL=0,GRXLAMI=6,GMSTXPMAC=15; What's de output? Thanks -------------------------------------------------------------------------------------------- ¿Ya sabes con quién vas? ¿Héroe o Villano? Prepárate para la batalla final en http://friki.ozu.es -------------------------------------------------------------------------------------------- Correo enviado desde http://www.ozu.es

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[Preprocessor] Expand to nothin - BOOST_PP_SEQ_PUSH_BACK
by Manuel Jung 24 Jun '07

24 Jun '07

Hi The BOOST_PP_SEQ_PUSH_BACK Macro expands to the seq with the extra element. But i don't want it to expand. I want to use the sequence later instead. How can i supress the expanding? I looked through the docs, but didn't find the right clue. I'm new too Preprocessorprogramming, so please excuse, if my question is stupid. Not the easiest thing, starting Preprocessor and Metaprogramming from nothing but the docs. Kind Regards Manuel Jung

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Boost.graph : 3D graphics primitives hierarchy (scenegraph)
by Nicholas Yue 23 Jun '07

23 Jun '07

Hi, I am considering using boost::graph to represent a DAG of 3D graphics primitive hierarchy, much like a scenegraph in games with the exception that no drawing code is embedded with this structure. The DAG is important in that I will be injecting changes to certain nodes which than affects/updates all it's child nodes. The intention is to allow me to write tools to work with this hierarchy. Eventually, these geometries may be turned into renderable entities (via some visitor iterator) for visualization/verification but that is not the main purpose. I am very new to boost::graph and hope someone can point me at information or open source project that is relevant to my exploration. Regards

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Dijkstra Visitor - Accessing the priority queue
by Jonas Gabriel 23 Jun '07

23 Jun '07

Good morning, I'm trying to make a single pair shortest path function using the goal-directed search technique based on dijkstra_shortest_paths and Visitors. In some point when the target vertex is processed, I would like to exit dijkstra_shortest_paths.To do that I 'm thinking trying to empty the priority queue. Can I access the priority queue inside a visitor using something like an extern declaration, since none of the Dijkstra Visitor's methods gets the priority queue as an argument ? With regards, Jonas Gabriel

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How to "splice" function arguments?
by Zeljko Vrba 23 Jun '07

23 Jun '07

I have the following situation with parallel overloaded functions: void f(X *x) | void f(int g, X *x) { { | { Impl<false>::f(-1, x); | Impl<true>::f(g, x); } | } template<bool F> struct Impl { typedef Detail<F> detail; void f(int g, X *x) { // CODE X *t = detail::smth(g, x); // CODE } }; In the "false" case, the argument g of Impl::f is not used and I want to get rid of it in compile-time as an optimization. The rest of the CODE is completely identical. In other words, I want to transform the "false" case, at compile-time, to the following: void f(X *x) { Impl<false>::f(x); } template<> struct Impl<false> { typedef Detail<false> detail; void f(X *x) { // CODE X *t = detail::smth(x); // CODE } }; Now, I could manually duplicate all of the code in Impl::f(int, X*) into Impl::f(X*) and remove the extra argument in the call to detail::smth. Doing such specialization manually seems _very_ inelegant and error-prone (I'm not really a fan of copy-pasting the code :)) Is there a better way; ie. doing it automatically? If so, how? It is acceptable to manually overload the top-level f() function, as it has no other code except the dispatch to Impl::f. I want full compile-time solution; ie. I do not want the stack space for the unneeded integer parameter ever to be allocated. [The code for the "false" case will be called on every function invocation, so YES, performance DOES matter even without apriori profiling.] Signatures in the implementation of Impl and Detail are flexible and I can change them if it helps solving the problem. The only thing that I do not want to change are the signatures of top-level f() function overloads. Thanks, Zeljko.

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[boost.test] Provoking a core-dump
by Zeljko Vrba 23 Jun '07

23 Jun '07

I'm using the boost minimal testing facility - mostly because I do not want to build full boost. [I spent one day about an hour trying to figure out how to build a 64-bit version on Solaris with SunCC and failed. So I gave up. Besides, minimal testing facility is enough for me.] Is it possible to configure BOOST_CHECK or BOOST_REQUIRE to behave as assert? BOOST_REQUIRE throws an exception which eventually gets caught and the test just prints "failed". That's not what I want. I want that the message is printed and abort() immediately called so that I can inspect the core-dump and debug the problem. A quick&dirty fix is to add something like the following on top of each test: #ifdef BTEST_OVERRIDE #define BOOST_REQUIRE assert #define BOOST_CHECK assert #endif Is there another possibility? Ideally, there would be a command-line switch to toggle this behaviour at runtime. So the first run of tests in "normal" mode just gives a quick overview of everything, and another "diagnostic" mode (running with a hypothetical "-abort" switch) calls abort() as soon as any CHECK or REQUIRE fails.

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