- Boost-users - lists.boost.org

Re: [Boost-users] [asio] how to specify a timeout?
by Andrea Bartoli 05 Dec '07

05 Dec '07

Yes, timeout and read event have two different callback, in read callback you have to m_timer->cancel() to avoid receive timeout also. ----- Messaggio originale ----- Da: Arkadiy Vertleyb <vertleyb(a)hotmail.com> A: boost-users(a)lists.boost.org Inviato: Martedì 4 dicembre 2007, 16:14:40 Oggetto: Re: [Boost-users] [asio] how to specify a timeout? Hello Andrea, "Andrea Bartoli" <bartols2000(a)yahoo.it> wrote > Use an asio::deadline_timer > > Example: > > asio::io_service m_ioService; > asio::deadline_timer * m_timer; > m_timer = new asio::deadline_timer(m_ioService); > > m_timer->expires_from_now( boost::posix_time::seconds(t) ); > m_timer->async_wait( boost::bind(&Foo:handle_timeout, this, > asio::placeholders::error) ); > asio::async_read( *m_socket, > asio::buffer( m_msg.header(), > m_msg.header_length() ), > boost::bind(&Foo::handle_read_header, > this, asio::placeholders::error) ); Thanks for your response. Still, it's not clear to me how to use it. In your example it seems that read operation and timeout are two independent things. How do I make sure only one of these two fires? Is it possile to cancel read operation once timout has been recieved? Thanks, Arkadiy _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users ___________________________________ L'email della prossima generazione? Puoi averla con la nuova Yahoo! Mail: http://it.docs.yahoo.com/nowyoucan.html

2 1

Re: [Boost-users] Building Boost 1.33.0 with bjam --v2 failes underHP-UX 11.23
by Vinokurov, Aleksandr 05 Dec '07

05 Dec '07

"Vladimir Prus" <ghost(a)cs.msu.su> wrote in message news:<fj3pej$14q$1(a)ger.gmane.org>... > Vinokurov, Aleksandr wrote: > > > > > > > Hello all, > > > > I'm trying to build boost 1.33 64-bit libraries under HP-UX 11.23 with the > > help of gcc 4.1.1 thru bjam. I was confused trying to supply -mlp64 > > compiler and linker option to the gcc though bjam options. By default > > calling ``bjam'' uses Boost.Build v.1, and setting ``bjam --v2'' -- will > > do v.2. Uncommenting "using gcc ;" in ./tools/build/v2/ user-config.jam > > file led bjam to "learn" this toolset, but calling ``bjam --v2'' from the > > boost_1_33_0/ folder splashes this: > > > > # bjam --v2 gcc > > ... > > > warning: Python location is not configured > > warning: the Boost.Python library won't be built > > Building Boost.Regex with the optional Unicode/ICU support disabled. > > Please refer to the Boost.Regex documentation for more information > > (and if you don't know what ICU is then you probably don't need it). > > /home/avinokur/boost_1_33_0/tools/build/v2/build/virtual-target.jam:868: > > in virtual-target.register-actual-name from module virtual-target error: > > Duplicate name of actual target: > > <pstage>libboost_date_time-gcc-d-1_33.so.1.33.0 error: previous virtual > > target { > > common%common.copy-libboost_date_time-gcc-d-1_33.so.1.33.0.SHARED_LIB { > > .... > > > Finally the only way to get this 64-bit libs was this hack: ``GXX="g++ > > -mlp64" bjam''. Does anybody knows what the heck is with the bjam --v2 and > > why it is unable to build boost from-the-box? > > Probably an answer with a question is in order -- what's the heck with trying > to build outdated version of Boost, in the first place? Second, Boost.Build > V2 is officially used started with 1.34. Surely, even if had bug in 1.33, > nobody's going to fix that. > > - Volodya > Okay: 1. I have no free time (just now) to spend upgrading my current project from Boost 1.33 to latest one and finding/fixing misplaces and new bugs. 2. If Boost.Build v2 official release was in 1.34, why it was shipped with Boost 1.33 archive? And there are no documentation (looked on the site) on how to force compiler option when using v1 Boost.Build? Sincerely yours, Aleksandr > > > > > > Aleksandr. > > > > > > PS. This is my gcc version, but seems it is not clued anyway: > > > > # gcc -v > > Using built-in specs. > > Target: ia64-hp-hpux11.23 > > Configured with: ../gcc/configure > > Thread model: posix > > gcc version 4.1.1

1 0

Iterator over values of std::map<K, V>
by John Kiopela 04 Dec '07

04 Dec '07

Hi all, I have been browsing through the docs, but I couldn't find anything useful. Does Boost have a std::map<K, V>::iterator adaptor which iterates over the values of the map only. That is, I would like to have an iterator of which operator*() function returns V, instead of std::pair<K, V>. My data is stored in a std::map<K, V> and I would to allow my users to iterate over the values. If it's not here, I'll make one myself. It shouldn't be that hard. Thanks in advance. Kind regards, John

5 8

Building Boost 1.33.0 with bjam --v2 failes under HP-UX 11.23
by Vinokurov, Aleksandr 04 Dec '07

04 Dec '07

Hello all, I'm trying to build boost 1.33 64-bit libraries under HP-UX 11.23 with the help of gcc 4.1.1 thru bjam. I was confused trying to supply -mlp64 compiler and linker option to the gcc though bjam options. By default calling ``bjam'' uses Boost.Build v.1, and setting ``bjam --v2'' -- will do v.2. Uncommenting "using gcc ;" in ./tools/build/v2/ user-config.jam file led bjam to "learn" this toolset, but calling ``bjam --v2'' from the boost_1_33_0/ folder splashes this: # bjam --v2 gcc warning: Python location is not configured warning: the Boost.Python library won't be built Building Boost.Regex with the optional Unicode/ICU support disabled. Please refer to the Boost.Regex documentation for more information (and if you don't know what ICU is then you probably don't need it). /home/avinokur/boost_1_33_0/tools/build/v2/build/virtual-target.jam:868: in virtual-target.register-actual-name from module virtual-target error: Duplicate name of actual target: <pstage>libboost_date_time-gcc-d-1_33.so.1.33.0 error: previous virtual target { common%common.copy-libboost_date_time-gcc-d-1_33.so.1.33.0.SHARED_LIB { gcc%gcc.link.dll-libboost_date_time-gcc-d-1_33.so.1.33.0.SHARED_LIB { gcc%gcc.compile.c++-greg_month.o.OBJ { gregorian/greg_month.cpp.CPP } } { gcc%gcc.compile.c++-greg_weekday.o.OBJ { gregorian/greg_weekday.cpp.CPP } } { gcc%gcc.compile.c++-date_generators.o.OBJ { gregorian/date_generators.cpp.CPP } } } } error: created from ./stage error: another virtual target { common%common.copy-libboost_date_time-gcc-d-1_33.so.1.33.0.SHARED_LIB { common%common.copy-libboost_date_time-gcc-d-1_33.so.1.33.0.SHARED_LIB { gcc%gcc.link.dll-libboost_date_time-gcc-d-1_33.so.1.33.0.SHARED_LIB { gcc%gcc.compile.c++-greg_month.o.OBJ { gregorian/greg_month.cpp.CPP } } { gcc%gcc.compile.c++-greg_weekday.o.OBJ { gregorian/greg_weekday.cpp.CPP } } { gcc%gcc.compile.c++-date_generators.o.OBJ { gregorian/date_generators.cpp.CPP } } } } } error: created from ./stage error: added properties: none error: removed properties: none /home/avinokur/boost_1_33_0/tools/build/v2/build/virtual-target.jam:175: in actualize-no-scanner from module object(file-target)@269 /home/avinokur/boost_1_33_0/tools/build/v2/build/virtual-target.jam:110: in object(file-target)(a)269.actualize from module object(file-target)@269 /home/avinokur/boost_1_33_0/tools/build/v2/build-system.jam:285: in load from module build-system /home/avinokur/boost_1_33_0/tools/build/v2/kernel/modules.jam:259: in import from module modules /home/avinokur/boost_1_33_0/tools/build/v2/kernel/bootstrap.jam:153: in boost-build from module /home/avinokur/boost_1_33_0/boost-build.jam:12: in module scope from module Calling v.1 Boost.Built with "cxxflags=-mlp64" got no luck too: # bjam cxxflags=-mlp64 --------------------------------------------------------------------- *** If you don't need Boost.Python, you can ignore this section *** *** pass --without-python to suppress this message in the future *** skipping Boost.Python library build due to missing or incorrect configuration couldn't find Python.h in "/usr/local/include/python2.2" You can configure the location of your python installation by setting: PYTHON_ROOT - currently "/usr/local" PYTHON_VERSION - The 2-part python Major.Minor version number (e.g. "2.2", NOT "2.2.1") - currently "2.2" The following are automatically configured from PYTHON_ROOT if not otherwise set: PYTHON_LIB_PATH - path to Python library object; currently "/usr/local/lib/python2.2/config" PYTHON_INCLUDES - path to Python #include directories; currently "/usr/local/include/python2.2" --------------------------------------------------------------------- Building Boost.Regex with the optional Unicode/ICU support disabled. Please refer to the Boost.Regex documentation for more information (and if you don't know what ICU is then you probably don't need it). don't know how to make cxxflags=-mlp64 ...found 1 target... ...can't find 1 target... Finally the only way to get this 64-bit libs was this hack: ``GXX="g++ -mlp64" bjam''. Does anybody knows what the heck is with the bjam --v2 and why it is unable to build boost from-the-box? Aleksandr. PS. This is my gcc version, but seems it is not clued anyway: # gcc -v Using built-in specs. Target: ia64-hp-hpux11.23 Configured with: ../gcc/configure Thread model: posix gcc version 4.1.1

3 2

C++ Performance
by nisha kannookadan 04 Dec '07

04 Dec '07

Hi everybody Im a quite new boost user and I wonder, why C++ Program is so slow. I wrote a program, and I have the same program in Matlab, I expected that my C++ version is much faster, but its not. I use matrices, vectors, matrix- and vector proxies. Do some solving and compute calculations with prod, element_div, etc.. Is boost in general slower than matlab, should I use something else? Id be real happy about any help. Regards Nisha K PS: This question was already in the developer forum. _________________________________________________________________ Invite your mail contacts to join your friends list with Windows Live Spaces. It's easy! http://spaces.live.com/spacesapi.aspx?wx_action=create&wx_url=/friends.aspx…

9 22

program_options: Printing description problem
by sj＠sjcomp.com 03 Dec '07

03 Dec '07

Hello, When I try to output options_description to cout (response to --help option, to show all available options) I get an assertion in in xstring header file. It's caused by execution format_paragraph function in option_description.cpp line 381. I narrowed down the problem to the length of the description for an option. This is the code: #include <boost/program_options.hpp> namespace po = boost::program_options; int main(int argc, char **argv){ po::options_description desc("t"); desc.add_options()("h", "1234567890qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZ"); po::variables_map vm; po::store(po::parse_command_line(argc, argv, desc), vm); po::notify(vm); if(vm.count("h")){std::cout<<desc<<"\n"; return 1;} return 0; } If I remove last Z in the description of h parameter the program works, otherwise it crashes. If I replace the message with some words, meaning if spaces are present, it still crashes (that's how I originally discovered the problem). What am I doing wrong, or how can I avoid this situation (other than decreasing the length of the descriptions for all of my parameters). I'm using boost 1.33.1 (how can I find out what was done to program_options in 1.34.1?) and Microsoft Visual Studio 2005 Professional. The project is compiled as Multi-threaded DLL Thanks. -- Regards, Alexander. http://sjcomp.com

2 1

Problems with boost::parameter macros &
by StephQ 03 Dec '07

03 Dec '07

I have the following 3 problems: 1) I can not use BOOST_PARAMETER_MEMBER_FUNCTION (and the const version) inside a template class. The following code: #include <boost/parameter.hpp> BOOST_PARAMETER_NAME(mu) BOOST_PARAMETER_NAME(sigma) template<class T1> class mah { private: int t1; int t2; public: BOOST_PARAMETER_MEMBER_FUNCTION( (void), set, tag, (optional (mu, *, 1) (sigma, *, 2) ) ) { t1 = mu; t2 = sigma; } }; int main() { mah<int> chissa; chissa.set( 2, 1 ); } Results in (with MSVC, similar error with gcc 3.4 cygwin): 1>c:\develop\essl_alpha\essl\test\parametertest1.cpp(27) : warning C4346: 'boost::parameter::aux::argument_pack<mah<T1>:: boost_param_params_27set<int>>::type' : dependent name is not a type 1> prefix with 'typename' to indicate a type 1> c:\develop\essl_alpha\essl\test\parametertest1.cpp(32) : see reference to class template instantiation 'mah<T1>' being compiled 1>c:\develop\essl_alpha\essl\test\parametertest1.cpp(27) : error C2923: 'mah<T1>::boost_param_result_27set' : 'boost::parameter::aux::argument_pack<mah<T1>:: boost_param_params_27set<int>>::type' is not a valid template type argument for parameter 'Args' 1>c:\develop\essl_alpha\essl\test\parametertest1.cpp(27) : warning C4346: 'mah<T1>::boost_param_result_27set::type' : dependent name is not a type 1> prefix with 'typename' to indicate a type 1>c:\develop\essl_alpha\essl\test\parametertest1.cpp(27) : error C2146: syntax error : missing ';' before identifier 'set' 1>c:\develop\essl_alpha\essl\test\parametertest1.cpp(27) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int 1>c:\develop\essl_alpha\essl\test\parametertest1.cpp(27) : warning C4183: 'set': missing return type; assumed to be a member function returning 'int' 2) I would like to create a class template for a "named tuple", something like: named_tuple<int,double,mu,sigma> n; // mu, sigma previously declared, maybe BOOST_PARAMETER_NAME? // should contain two variables of type int, double. Would be really nice if they are named exactly _mu and _sigma, so I need boost PP or something? n.set( _mu=1, _sigma=2.0 ); // set internal variables n.set( _mu=1 ); double x = n.get( _sigma ); n.get( _mu, _sigma ); // This returns a tuple with the internal values. I think a class like this could be really usefull, and it would be really nice to see tuples get this extension. IMHO they are very clear from a user point of view. The problem (apart from problem 1) is that the macro BOOST_PARAMETER_MEMBER_FUNCTION does not play nicely if I just put a template parameter (say N1 of named_tuple<T1,T2,N1,N2>) instead of mu in BOOST_PARAMETER_MEMBER_FUNCTION( (void), set, tag, (optional (mu, *, 1) (sigma, *, 2) ) Again I suspect I need boost PP or use directly ArgumentPack. 3) How should I consider the overloading of a BOOST_PARAMETER_MEMBER_FUNCTION? Is it fine to just write the following? class mah2 : public mah // mah as before but with no templates. { public: template<class A1, class A2> void set( A1 a1, A2 a2 ) // need to supply defaults here... { mah<int,int>::set( a1, a2 ); } }; As usual any help is extremely appreciated. Thank you in advance. Best Regards StephQ

1 0

[asio] how to specify a timeout?
by Arkadiy Vertleyb 03 Dec '07

03 Dec '07

Hi all, Is it possible in asio to supply a timeout for a read/write operation? Thanks, Arkadiy _________________________________________________________________ You keep typing, we keep giving. Download Messenger and join the i’m Initiative now. http://im.live.com/messenger/im/home/?source=TAGLM

1 0

The Memory leak occurs with intrusive_ptr<T> and a class which containing wstring member variable.
by Youhei Murakami 03 Dec '07

03 Dec '07

Hello everyone. I had met a memory leak error runnnin program generated from a source which is attached to this mail. [flow] --The "sampleclass"-class has a wstring object as a member variable and a setter and a getter for this variable. --A sampleclass instance generated by the default new. --A pointer to sampleclass instance attached to intrusive_ptr<sampleclass>. --Make wstring instance with string L"0123456789abcdef". --The wstring instance set to a sampleclass instance using the sampleclass's setter. --Finish this program and a memory leak occurs. [emvironment] WindowsXP 64bit VisualStudio2005 sp1 boost-1_34_1 Unicode Charset #include "stdafx.h" #include <iostream> #include <boost/intrusive_ptr.hpp> #include <boost/detail/atomic_count.hpp> #include <boost/config.hpp> using namespace std; using namespace boost; #ifdef _DEBUG #define _CRTDBG_MAP_ALLOC #include <stdlib.h> #include <crtdbg.h> #define new ::new(_NORMAL_BLOCK, __FILE__, __LINE__) #endif namespace test { class countable { public: countable() : refcount(0) { } void add_ref( void ) { ++refcount; } void release( void ) { if( 0 == --refcount ) { delete this; } } int getcount() { return static_cast<long>(refcount); } private: boost::detail::atomic_count refcount; }; class sampleclass : public countable { wstring message; public: sampleclass(){} sampleclass( const wstring &mes ) : message(mes) {} void setmessage( const wstring &mes ) { message = mes; } wstring getmessage() { return message; } }; }; namespace boost { using namespace test; inline void intrusive_ptr_add_ref(countable *p) { p->add_ref(); } inline void intrusive_ptr_release(countable *p) { p->release(); } } int _tmain(int argc, _TCHAR* argv[]) { _CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF|_CRTDBG_LEAK_CHECK_DF); using namespace test; { intrusive_ptr<sampleclass> intrusive_( new sampleclass(wstring(L"initial")) ); //---------- memory leak prone ------------------------// wstring mes( L"0123456789abcdef" ); intrusive_->setmessage( mes ); //---------- memory leak prone ------------------------// wcout << intrusive_->getmessage().c_str() << endl; } getchar(); return EXIT_SUCCESS; }

2 1

[unordered] Remainder: Unordered review will start December 7
by Ion Gaztañaga 03 Dec '07

03 Dec '07

Hi to all, We have several reviews on December and just between two fast-track reviews, Unordered library will be reviewed December 7-16. For those interested in the library: *Description*: An implementation of the unordered containers specified in TR1, with most of the changes from the recent draft standards. *Author*: Daniel James *Download*: http://www.boost-consulting.com/vault/index.php?action=downloadfile&filenam… The documentation is in the zip file. Regards, Ion

1 0