June 2008 - Boost-users - lists.boost.org

Boost support for consoles? (X360, PS3)
by JF Charron 02 Jul '08

02 Jul '08

I am currently developping software for Windows. I'd like to use boost as I have used it before and liked it. However, in the near future, I expect to also develop for the Xbox 360 and the PlayStation 3 consoles. Currently I make different projects when doing non portable Windows stuff. However, if boost can be used on the X360 and PS3, it could be really usefull as I could do, I suppose, pretty portable code between the 3 platforms with minimum changes. So my question is: Is Boost working on Xbox 360 and PlayStation3? Thanks! JFC

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bjam, mingw and cross-compiling
by Paul 02 Jul '08

02 Jul '08

Hi, I find the bjam documentation and configuration files very frustrating... it seems to almost do what you want, but it doesn't finish the job and tell you how to actually do it correctly. I have been trying to cross-compile boost 1.35.0 for windows, on a linux host. The gcc.jam file mentions cross-compiling, but does not mention how to get it done. I almost got it to work with a user-config.jam: using gcc : mingw : /home/paul/mingw/bin/mingw32-g++ : <flavor>mingw32 <root>"/home/paul/mingwj/" ; and then hacking away at the gcc.jam file, which checks the os.system variable to decide how to link object files and use the -fPIC flag... around line 703: if [ os.on-windows ] change to... if [ modules.peek : UNIX ] to force it to use -mthreads instead of -pthreads if [ os.name ] != CYGWIN && [ os.name ] != NT change to if [ os.name ] = CYGWIN && [ os.name ] != NT to correct -fPIC it almost did the right thing, except for the extensions... i assume if i hack these lines, I'll get what i want... type.set-generated-target-suffix STATIC_LIB : <toolset>gcc <target-os>cygwin : a ; type.set-generated-target-suffix IMPORT_LIB : <toolset>gcc <target-os>cygwin : dll.a ; type.set-generated-target-prefix IMPORT_LIB : <toolset>gcc <target-os>cygwin : lib ; BUT then I'll have to fight to use the mingw32-ar and mingw32-windres and other programs. Isn't there an easier way? *please* I'm giving up on 1.35 as I've just read about the serialization vector bug, so I'll attempt to use 1.34.1 thanks, Paul

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Re: [Boost-users] yet another logging library
by Maarten Nieber 01 Jul '08

01 Jul '08

Hi Mojmir, I think you would need to explain the advantages of your (future) library over existing logging libraries. In what circumstances would your library be the better choice? Best regards, Maarten ----- Original Message ---- From: Mojmir Svoboda <mojmir.svoboda(a)illusionsoftworks.com> To: boost-users(a)lists.boost.org Sent: Wednesday, June 4, 2008 5:07:14 PM Subject: [Boost-users] yet another logging library Hello, i'm trying to create a logging library framework. It is my second attempt, the first can be seen at http://www.codeplex.com/flog . There is some documentation in the doc directory that is perhaps worth reading. The first version used boost::iostreams and not very smart locking mechanism in mt environment (in terms of performance mainly), but served more as a verification 'it can be done and it is not that ugly as i thought' than a real library candidate. Now i'd like to focus on performance and code size, so I made a sketch of the next version. It is really small and is rather a model than anything usable, but before I start implementation, I'd like to know opinion of library writers and users - what do you think about the concept? is it worth continuing, or i'd better go doing something better? :) The sketch of the next version can be seen at http://www.codeplex.com/fflog It's meant to be illustration of the interface and it's usage itself. Short summary of the design: User specifies compile-time vector of requested filters that apply to the logged text. Each filter requiring user's input is tagged and when logging function is invoked, the supplied types are checked against expected type, set to filter and later written to a buffer. Buffers are managed by the sink_manager and likely is one of few places that has to be mt-safe, as the rest is on the stack. I thought about some lock-free queues of buffers that are assigned to caller and filled returned back to write. The actual write of the buffer can be performed in dedicated lower-priority thread. Run-time filtering like level or context is possible, but not implemented yet. The main idea can be seen in the 1st version in runtime_filtering.hpp. Again, runtime values are shared among threads, so they have to be protected in mt environment. Many thanks for your attention, Mojmir _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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Using std::bitset with boost::assign::assign_map_list_of
by Sean Farrow 01 Jul '08

01 Jul '08

Hi: How can I assign a std::bitset to the first parameter (key) of a map using boost::assign::assign_map_list_of, do I have to construct a bitset or can I use one on the fly? In want to be able to say: Map =boost::assign::Assign_Map_list_of(bitset, int); How can I do this for multiple values? Sean. __________ Information from ESET NOD32 Antivirus, version of virus signature database 3228 (20080630) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com

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Tips/primers on writing graph adapters
by Alex Dow 01 Jul '08

01 Jul '08

Hello, I'm looking for an online primer or tutorial on writing graph adapters. I read "Converting Existing Graphs to BGL" from the BGL documentation, as well as the docs for several of the existing graph adapters (subgraph, edge_list), but I'm still not getting it. Any leads would be helpful. Thanks!

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Boost::GIL
by Martin Fisher 01 Jul '08

01 Jul '08

I'm trying to get the GIL examples to compile: using gcc 4.3.0 on a Fedora 9 system with a recent download of boost 1_35 So far I have tried mandelbrot and x_gradient - "as is" in each case. I get compilation errors at lines 46 and 160 of bit_aligned_pixel_reference.hpp: At line 46 bit_aligned_pixel_reference.hpp changes meaning of bit_range from class boost::gil::bit_range<boost::gil::bit_aligned_reference<B,C,L,M>::bit_size, isMutable>" and at line 160 - bit_aligned_pixel_reference.hpp declaration for const boost::gil::bit_aligned_pixel_reference<B,C,L,M>::bit_size,isMutable>&boost::gil::bit_aligned_pixel_refernce<B,C,L,M>::bit_range( ) const Any suggestions as to why things are as expected? I was also getting errors in GIL algorithm.hpp - bad_cast is not a member of std. I "fixed" this by including boost/cast.hpp - this maybe (most likely) is the wrong way to go ? Many thanks Martin

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Re: [Boost-users] _4 in Boost.Lambda ?
by Hui Li 01 Jul '08

01 Jul '08

What is phoenix? On 6/29/08 12:00 PM, "boost-users-request(a)lists.boost.org" <boost-users-request(a)lists.boost.org> wrote: > Message: 2 > Date: Sun, 29 Jun 2008 10:42:03 +0800 > From: Joel de Guzman <joel(a)boost-consulting.com> > Subject: Re: [Boost-users] _4 in Boost.Lambda ? > To: boost-users(a)lists.boost.org > Message-ID: <g46srj$ocf$1(a)ger.gmane.org> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Steven Watanabe wrote: >> AMDG >> >> Hui Li wrote: >>> How do I get _4, _5, etc out of Boost.Lambda? >>> Currently I have only _1, _2, and _3 . >> >> It can't be done without fairly major surgery to lambda. > > Use phoenix :-) > > Regards, > -- > Joel de Guzman > http://www.boostpro.com > http://spirit.sf.net

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[tuple][hash] Hashing a tuple question
by Milosz Marian Hulboj 30 Jun '08

30 Jun '08

Hello, I'm looking for advice on hashing the tuples. For my task it seems to be enough to just take every element from the tuple and apply boost::hash_combine to each of the elements. However I am currently thinking of a clever way of writing it in a generic form. Has anyone done something like that and could give some hints? Cheers, Milosz

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Fwd: [Date_Time] time_from_string bug ?
by Judicaël Bedouet 30 Jun '08

30 Jun '08

Hello, When I do std::cout << boost::posix_time::time_from_string ("2008-06-26 0"); output is 2008-Jun-26 00:00:00 But when I do std::cout << boost::posix_time::time_from_string ("2008-06-26"); output is 2008-Sep-17 16:06:26 Isn't a bug ? Even if this format is not accepted, should not it throw an exception ? J. Bedouet

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recuring through / with boost filesystem
by brad＠16systems.com 30 Jun '08

30 Jun '08

Wondering if someone could suggest how to skip Linux Kernel related filesystems (like proc, sysFS stuff, etc) when using boost::filesystem to recurse thru / I've tried this: if (boost::filesystem::is_regular(itr->status()) && !boost::filesystem::is_empty(itr->path()) &&!boost::filesystem::symbolic_link_exists(itr->path())) But I still get hung up on some files in proc and sys. My goal is to read every readable file... starting at root. Silly goal, I know. Just experimenting with boost::filesystem. Any tips of clue-by-fours are appreciated. BTW, I can do this and it works: // Skip leafs with certain names. Leafs may be folders or files. if (itr->path().leaf() == "sys") { std::clog << "Skip: " << itr->path() << std::endl; continue; } But I'd like a more automated approach to skip these 'oddball' directories. Thanks, Brad

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