- Boost-users - lists.boost.org

[Exceptions] Boost exception relationship with std exception & streams
by joel falcou 22 Jun '10

22 Jun '10

I'm about to use boost.exception in a library which may require to be built in environnement where using std is eitehr impossible or has huge penalty one may want to avoid. My main idea was to use the BOOST_THROW_EXCEPTION and the error_info to build the diagnostic infos into exception class then: - if BOOST_NO_EXCEPTIONS is not set, process normally - if BOOST_NO_EXCEPTIONS is set, then jump into a throw_exception function that just stream diagnsotic_info to cerr or some such - if BOOST_NO_EXCEPTIONS and NT2_NO_STREAM is set, jump to a throw_exception that fprintf the diagnostic_info to stderr My question is: how deeply std elements ar eintegrated in boost::exception and is this kind of scheme workable with current version ?

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[statechart] Somebody aware of a graphical uml tool?
by Dietmar Hummel 22 Jun '10

22 Jun '10

Hi all! Does somebody know a graphical uml modelling tool which ist able to create template code for boost::statechart? Thanks in advance... Dietmar

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posix_time io slow
by Hite, Christopher 22 Jun '10

22 Jun '10

I'm in the process of writing a logging library and I noticed that each call to print out ptime took about ~50us. Even just printing out the duration time_of_day cost ~20us. I'm using boost1.43 with g++ (GCC) 4.4.3 g++ -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -pthread -DNDEBUG I was able to do the same thing for <1us not using stream ops (see code below). Does anyone care to optimize this stuff? I'm considering specializing my own boost::date_time::ostream_time_duration_formatter to override to slow impl. template<typename int_t> void printDecimal(int_t d,int places,char* out){ int_t rest=d; for(int i=0;i<places;i++){ out[places-i-1]= '0'+(rest%10); rest/=10; } } void printDuration(const boost::posix_time::time_duration& d,char* out){ int64_t ticks=d.ticks(); int64_t us=ticks%1000000; int64_t r1=ticks/1000000; int64_t s=r1%60; int64_t r2=r1/60; int64_t m=r2%60; int64_t h=r2/60; printDecimal(h,2,out); out[2]=':'; printDecimal(m,2,out+3); out[5]=':'; printDecimal(s,2,out+6); out[8]='.'; printDecimal(us,6,out+9); } .. char buf[32]; printDuration(pt.time_of_day(),buf); std::cout<< buf <<" -\n"; // <1us //std::cout<< pt.time_of_day() <<" -\n"; // ~15us Chris

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Most efficient way to use boost::asio
by Dmytro Ovdiienko 22 Jun '10

22 Jun '10

Hello All, I'm implementing high performance network application and looking for the tutorial how to use boost asio library in _most_ efficient way. One part of application is TCP server/client. It should support SSL (if remote site supports SSL). Also it should support synchronous and asynchronous modes to write/read to/from socket to get best latency/throughput results (I'm not sure though if there any sense in synchronous mode). Another part is UDP client. It uses asynchronous IO. I noticed that null_buffers, shared_ptr make application slower. Are there other stuffs I should avoid? Thank you for assistance. Dima

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Re: [Boost-users] Serializing to .csv files
by alfC 22 Jun '10

22 Jun '10

On Jun 13, 7:37 pm, "Sean Farrow" <sean.far...(a)seanfarrow.co.uk> wrote: > Hi: > > Has anyone ever written extra classes to serialize c++ datatypes to .csv > files using boost.Serialization. this is the closest (and still not quite) thing I found to what you are looking for http://code.google.com/soc/2008/boost/appinfo.html?csaid=BE3EEB904A90B03A serialization to YAML format. I don't know more details, but it can be useful to use as an example on how to do .cvs serialization. On the other hand what you can actually serialize with .cvs is limited to list of numbers, isn't it? (is there even a formal specification what a cvs file should be like?) Alfredo

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Re: [Boost-users] boost-io streams building with zlib/bzip2 again
by Johan Nilsson 22 Jun '10

22 Jun '10

Sean Farrow wrote: > Hi: > Ok, This is now sorted, but in the process, I may have found a bug, > if I specify a path on windows using a full path: > C:\progrma files\zlib\ I assume that's another typo? > This doesn't work I get a c1083 error. > But if I use "c:\progra~1\zlib\" as the path this works fine. > Is this a bug, or intended beheavour? It's a problem related to passing variables containing spaces to bjam. See if this helps: http://www.boost.org/doc/tools/build/doc/html/jam/usage.html#jam.usage.opti… Regards / Johan

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Re: [Boost-users] boost-io streams building with zlib/bzip2 again
by Mikko Vainio 22 Jun '10

22 Jun '10

It's probably a typo: you misspelled "program" in your full path invocation. Cheers, Mikko On 06/22/2010 08:05 AM, Sean Farrow wrote: > Hi: > Ok, This is now sorted, but in the process, I may have found a bug, if I > specify a path on windows using a full path: > C:\progrma files\zlib\ > This doesn't work I get a c1083 error. > But if I use "c:\progra~1\zlib\" as the path this works fine. > Is this a bug, or intended beheavour? > Regards > Sean. > > -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Steven Watanabe > Sent: 22 June 2010 05:10 > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] boost-io streams building with zlib/bzip2 again > > AMDG > > Sean Farrow wrote: >> Error 2 doesn't make sense, can you elaborate? >> > > It's Perl syntax for regex replacement. i.e. replace progrma with > program. > >> Sean Farrow wrote: >> >>> Bjam toolset=msvc stage -SZLIB_SOURCE="c:\progrma files\zlib\" >>> >> >> Error 1: lowercase -s, -sZLIB_SOURCE... >> Error 2: s/progrma/program/ >> > > In Christ, > Steven Watanabe > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > --

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Re: [Boost-users] boost-io streams building with zlib/bzip2 again
by Steven Watanabe 22 Jun '10

22 Jun '10

AMDG Sean Farrow wrote: > Error 2 doesn't make sense, can you elaborate? > It's Perl syntax for regex replacement. i.e. replace progrma with program. > Sean Farrow wrote: > >> Bjam toolset=msvc stage -SZLIB_SOURCE="c:\progrma files\zlib\" >> > > Error 1: lowercase -s, -sZLIB_SOURCE... > Error 2: s/progrma/program/ > In Christ, Steven Watanabe

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Re: [Boost-users] boost-io streams building with zlib/bzip2 again
by Richard Clokie 22 Jun '10

22 Jun '10

On 22/06/2010 4:21 p.m., Sean Farrow wrote: > Ok, so what should the correct zlib_source path be given that is it in > c:\program files\zlib\ > Cheers > Sean. You typoed the 'program' in "c:\progrma files\zlib\" in your bjam invocation.

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Re: [Boost-users] boost-io streams building with zlib/bzip2 again
by Steven Watanabe 22 Jun '10

22 Jun '10

AMDG Sean Farrow wrote: > Following the previous message, > > I've altered the command line used to: > > Bjam toolset=msvc stage -SZLIB_SOURCE="c:\progrma files\zlib\" > > This still doesn't find the zlib.h file which is in c;\program files\zlib. > > Can someone give me a command line under windows that builds this > successfully, or tell me what is going wrong, as I appear to have followed > instructions in the IO streams docs. > Error 1: lowercase -s, -sZLIB_SOURCE... Error 2: s/progrma/program/ In Christ, Steven Watanabe

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