June 2010 - Boost - lists.preview.boost.org

Re: [boost] [GIL] kth_channel_view
by fabien.castan＠free.fr 03 Aug '10

03 Aug '10

>A good example of using kth_channel_view is this: > > rgb8_image_t img( 100, 100 ); > typedef typename kth_channel_view_type< 0, const rgb8_view_t>::type view_t; > view_t first = kth_channel_view<0>( const_view( img )); Another interesting possibility is: typedef kth_channel_view_type< 0, const rgb8_view_t> KthChannelView; typename KthChannelView::type first = KthChannelView::make( const_view(img) ); It can be a good thing to directly use channel type, like this: typedef channel_view_type< red_t, const rgb8_view_t>::type view_t; view_t first = channel_view<red_t>( const_view( img )); I have written some code to do that, based on kth_channel_view_type. It's maybe intersting to include in gil. Regards, Fabien namespace boost { namespace gil { template <typename Channel, typename View> struct channel_type_to_index { static const int value = gil::detail::type_to_index< typename color_space_type<View>::type, // color (mpl::vector) Channel // channel type >::type::value; //< index of the channel in the color (mpl::vector) }; template <typename Channel, typename View> struct channel_view_type : public kth_channel_view_type<channel_type_to_index<Channel,View>::value, View> { static const int index = channel_type_to_index<Channel,View>::value; typedef kth_channel_view_type<index, View> parent_t; typedef typename parent_t::type type; static type make(const View& src) { return parent_t::make(src); } }; /// \ingroup ImageViewTransformationsKthChannel template <typename Channel, typename View> typename channel_view_type<Channel,View>::type channel_view(const View& src) { return channel_view_type<Channel,View>::make(src); } }}

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Vault - multiple C/C++ files versus a compressed one
by vicente.botet 13 Jul '10

13 Jul '10

Hi, "jvd" you have uploaded all these files on the vault. It would be great if you upload a compressed file at once instead, and remove the C/C++ files. Best, Vicente sobol.hpp Home/Random 11.8 Kb 17.06.2010 20:56 niederreiter_base2.hpp Home/Random 13.38 Kb 17.06.2010 20:56 faure.hpp Home/Random 10.26 Kb 17.06.2010 20:56 gray_coded_qrng_base.hpp Home/Random/detail 3.03 Kb 17.06.2010 20:45 out-sobol.png Home/Random/images 19.31 Kb 17.06.2010 20:31 out-niederreiter_base2.png Home/Random/images 19.6 Kb 17.06.2010 20:30 out-faure.png Home/Random/images 11.84 Kb 17.06.2010 20:30 0 dim2demo.cpp Uses all quasi random kernels to output quasi-randomly distributed points. Home/Random 2.54 Kb 17.06.2010 20:29 4 quasi_random_number_generator_base.hpp Home/Random/detail 4.69 Kb 17.06.2010 20:27 _____________________ Vicente Juan Botet Escribá http://viboes.blogspot.com/

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[xint] Design Question
by Chad Nelson 09 Jul '10

09 Jul '10

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I'm adding an "unsigned" option to the XInt library, so that fixed-length integers act exactly like their built-in counterparts. That in itself is not a problem, since unsigned fixed-length integers have a well-known and standard behavior. The problem is: what should the library do if the user asks for an unsigned *non*-fixed-length integer? The options I've come up with so far, in order of my personal preference: A: Make the unsigned option part of the fixed-length option, so it *can't* be specified separately. (The most elegant solution, but perhaps not the most useful.) B: Refuse to compile (or if I can't find a way to do that, instantiate) it, on the grounds that the combination can't logically be supported. C: Throw an exception if any calculation results in a negative number. (Not very useful, but logical because under the built-in types' unsigned rules, a negative number in an unlimited-length library would be infinitely long.) D: Force any negative numbers to a different value, such as zero or maybe their positive counterparts. (I can't think of any use for this, I just put it here for completeness.) Can anyone think of a potential reason for options C or D? Or a reason to prefer option B? Or maybe come up with a different idea entirely? - -- Chad Nelson Oak Circle Software, Inc. * * * -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkwY2EYACgkQp9x9jeZ9/wSZuACgqIjJ85p0wUrwhCR/tcvY8QUL bagAniFZU/UGwKfpK7juhuWYxXwMb2Ar =qvcJ -----END PGP SIGNATURE-----

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[Fusion] Permission to update release branch and roll in dependencies
by Tobias Schwinger 08 Jul '10

08 Jul '10

Dear release team, we're about to freeze the next release. I'd like to kindly ask for your permission to address the issues discussed in this thread http://thread.gmane.org/gmane.comp.lib.boost.devel/198532/ before it's too late, again. Reportedly the outdated files do - other than hoped in that thread - NOT work anymore - and neither do the new and documented ones for the lack of dependencies. So, what I'd like to do is: o merge trunk changes into the Functional module of Fusion o add Forward o optionally add Factory Please check the new mini libraries for "release compliance" and give me a go on the fix. Would be too bad to go with a partially defunct Fusion in two releases for bureaucratic reasons. Please also note that rolling back to a proper previous version might involve more changes and will complicate future merges for us. Regards, Tobias

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[mpi] Boost.MPI broken
by Jeremiah Willcock 03 Jul '10

03 Jul '10

Almost all of the regression tests for Boost.MPI on the Boost trunk are failing, and this is leading to failures in Boost.Graph.Parallel as well. Is this a known problem? Could someone please work on fixing it? Thank you. -- Jeremiah Willcock

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[intro] Preview: Introspection library
by Stefan Strasser 02 Jul '10

02 Jul '10

Hi, I'd be interested in comments on an introspection library I've been developing. there has been no "Is there any interest..."-e-mail yet, as it was started out of necessity in "namespace detail" of another library, so you're also welcome to express interest/disinterest in a library like this, without any specific comments. source code: https://svn.boost.org/trac/boost/browser/sandbox/intro/boost/intro/ the library defines a concept that exposes the members of a class, for introspection algorithms to work with. e.g. the "print" algorithm applied to a simple object implementing the concept yields the following results: intro::print(a,std::cout); ---- { A_base = { int member_of_base = 789; }; int a = 123; float b = 456.7; vector<int,class std::allocator<int> > vec = {2, 4, 6, 8, 10}; } --- other algorithms that are currently implemented: - apply_members[_binary]: apply a user-supplied functor to each member - apply_recursive: follow pointers, references, STL container elements, etc. - serialize: serialization of an object tree of 1M objects: 80 ms. Boost.Serialization: 330 ms. serialization of an object graph of 1M objects: 410 ms. Boost.Serialization: 2700 ms. - move: move-construct an object - reset_shared planned or not yet in the sandbox are deserialize, print_recursive, copy_deep, copy_shallow, equal_deep, equal_shallow. an implementation of the concept looks like this: template<class Mapping> friend void introspect(Mapping mapping,type<A>){ mapping (base_class<A_base>() ) (member<A,int ,&A::m_a>() ) (member<A,float ,&A::m_b>() ) (member<A,std::vector<int>,&A::m_vec>()) (); } members can also be associated with tags or data, and can be assigned semantics (e.g. polymorphic, shared/unique for pointers), but I won't go into too much detail for now. Best, Stefan

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[RFC] string inserter/extractor "q u o t i n g"
by Beman Dawes 01 Jul '10

01 Jul '10

This is a request for comments on a delimited string inserter/extractor facility for Boost. The initial motivation is a need for Boost.Filesystem class path inserters and extractors to handle paths with embedded spaces. The problems stems from standard library stream I/O not round-tripping strings with embedded spaces, so a general solution might be of interest. It is a bit surprising that Boost doesn't seem to already have such a utility. The general solution presented here follows very common practice as to the format: strings are enclosed in delimiters on output and the delimiters (if present) are stripped on input. In the external format, an escape character precedes itself or the delimiter character should either be present in the string. The default delimiter character is the double-quote (") and the default escape character is the backslash (\). These defaults can be overridden. Example: const std::string expected("foo\\bar, \" *"); std::cout << delimit(expected); std::string actual; std::stringstream ss; ss << delimit(expected); ss >> undelimit(actual); assert(expected == actual); The output to cout is "foo\\bar, \" *" A prototype is available at http://svn.boost.org/svn/boost/branches/filesystem3/boost/delimit_string.hpp. It is a header only implementation. Do you think this component, with suitable documentation, tests, etc., should become a part of Boost? If so, What library should it be part of? Seems too small to be a library all of its own. Where should the header live? What namespace should it be in? Are delimit() and undelimit() suitable names for the functions? Any other comments? Thanks, --Beman

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Regression tests machines
by Joel Falcou 01 Jul '10

01 Jul '10

I am managing some spare machine with reasonable performances and compiler selection that are basically underused at the moment (including various i64, AMD and PowerPC server blade) with both gcc and icc. I guessed they could be used to run the boost regression test on a dialy or weekly basis. I found out about the : http://www.boost.org/development/running_regression_tests.html page but I wanted to know if there is any speficic need in term of paltofrm/compiler coverage or if I can just run whatever and push the regression result up ?

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[Boost.Test] error when running
by FIXED-TERM Lay Seak Meng (CR/RTC1.2-NA) 01 Jul '10

01 Jul '10

Hi, I am new to Boost Test framework. I wrote a small test case and put it as a post build event. #include "stdafx.h" BOOST_AUTO_TEST_CASE(Test1) { BOOST_REQUIRE(false); } I got this error after linking. 1>Running Unit Tests 1>'c:\Documents' is not recognized as an internal or external command, 1>operable program or batch file. Anyone knows how to fix this? Thanks

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Re: [boost] Status of (boost) lockfree?
by mikexu 30 Jun '10

30 Jun '10

Hi, I ran into exactly the same issue with Microsoft Visual Studio 2010. Here is the error I got: u:\development\thirdparty\boost_1_43_0\boost\atomic.hpp(167): warning C4800: 'intptr_t' : forcing value to bool 'true' or 'false' (performance warning) 1>u:\development\thirdparty\boost_1_43_0\boost\atomic\detail\integral-casts.hpp(228): error C2621: member 'boost::detail::atomic::platform_atomic<T>::e' of union 'boost::detail::atomic::platform_atomic<T>::<unnamed-tag>' has copy constructor 1> with 1> [ 1> T=boost::lockfree::tagged_ptr<boost::lockfree::detail::fifo<int,boost::lockfree::caching_freelist_t,std::allocator<int>>::node> 1> ] 1> u:\development\thirdparty\boost_1_43_0\boost\atomic\detail\base.hpp(63) : see reference to class template instantiation 'boost::detail::atomic::platform_atomic<T>' being compiled 1> with 1> [ 1> T=boost::lockfree::tagged_ptr<boost::lockfree::detail::fifo<int,boost::lockfree::caching_freelist_t,std::allocator<int>>::node> 1> ] 1> u:\development\thirdparty\boost_1_43_0\boost\atomic.hpp(20) : see reference to class template instantiation 'boost::detail::atomic::internal_atomic<T>' being compiled 1> with 1> [ 1> T=boost::lockfree::tagged_ptr<boost::lockfree::detail::fifo<int,boost::lockfree::caching_freelist_t,std::allocator<int>>::node> 1> ] 1> u:\development\thirdparty\boost_1_43_0\boost\lockfree\fifo.hpp(202) : see reference to class template instantiation 'boost::atomic<T>' being compiled 1> with 1> [ 1> T=boost::lockfree::tagged_ptr<boost::lockfree::detail::fifo<int,boost::lockfree::caching_freelist_t,std::allocator<int>>::node> 1> ] 1> u:\development\thirdparty\boost_1_43_0\boost\lockfree\fifo.hpp(223) : see reference to class template instantiation 'boost::lockfree::detail::fifo<T,freelist_t,Alloc>' being compiled 1> with 1> [ 1> T=int, 1> freelist_t=boost::lockfree::caching_freelist_t, 1> Alloc=std::allocator<int> 1> ] 1> u:\development\thirdparty\concurrencytest\fifotest\fifo.cpp(15) : see reference to class template instantiation 'boost::lockfree::fifo<T>' being compiled 1> with 1> [ 1> T=int 1> ] 1>u:\development\thirdparty\boost_1_43_0\boost\atomic\detail\integral-casts.hpp(228): error C2621: member 'boost::detail::atomic::platform_atomic<T>::e' of union 'boost::detail::atomic::platform_atomic<T>::<unnamed-tag>' has copy constructor 1> with 1> [ 1> T=boost::lockfree::tagged_ptr<boost::lockfree::caching_freelist<boost::lockfree::detail::fifo<int,boost::lockfree::caching_freelist_t,std::allocator<int>>::node,std::allocator<boost::lockfree::detail::fifo<int,boost::lockfree::caching_freelist_t,std::allocator<int>>::node>>::freelist_node> 1> ] 1> u:\development\thirdparty\boost_1_43_0\boost\atomic\detail\base.hpp(63) : see reference to class template instantiation 'boost::detail::atomic::platform_atomic<T>' being compiled 1> with 1> [ 1> T=boost::lockfree::tagged_ptr<boost::lockfree::caching_freelist<boost::lockfree::detail::fifo<int,boost::lockfree::caching_freelist_t,std::allocator<int>>::node,std::allocator<boost::lockfree::detail::fifo<int,boost::lockfree::caching_freelist_t,std::allocator<int>>::node>>::freelist_node> 1> ] 1> u:\development\thirdparty\boost_1_43_0\boost\atomic.hpp(20) : see reference to class template instantiation 'boost::detail::atomic::internal_atomic<T>' being compiled 1> with 1> [ 1> T=boost::lockfree::tagged_ptr<boost::lockfree::caching_freelist<boost::lockfree::detail::fifo<int,boost::lockfree::caching_freelist_t,std::allocator<int>>::node,std::allocator<boost::lockfree::detail::fifo<int,boost::lockfree::caching_freelist_t,std::allocator<int>>::node>>::freelist_node> 1> ] 1> u:\development\thirdparty\boost_1_43_0\boost\lockfree\detail\freelist.hpp(131) : see reference to class template instantiation 'boost::atomic<T>' being compiled 1> with 1> [ 1> T=boost::lockfree::tagged_ptr<boost::lockfree::caching_freelist<boost::lockfree::detail::fifo<int,boost::lockfree::caching_freelist_t,std::allocator<int>>::node,std::allocator<boost::lockfree::detail::fifo<int,boost::lockfree::caching_freelist_t,std::allocator<int>>::node>>::freelist_node> 1> ] 1> u:\development\thirdparty\boost_1_43_0\boost\lockfree\fifo.hpp(208) : see reference to class template instantiation 'boost::lockfree::caching_freelist<T,Alloc>' being compiled 1> with 1> [ 1> T=boost::lockfree::detail::fifo<int,boost::lockfree::caching_freelist_t,std::allocator<int>>::node, 1> Alloc=std::allocator<boost::lockfree::detail::fifo<int,boost::lockfree::caching_freelist_t,std::allocator<int>>::node> 1> ] 1> 1>Build FAILED. 1> 1>Time Elapsed 00:00:10.46 ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== Have you found a solution yet? -Mike Andrey Zhdanov wrote: > > > > >> i don't have access to other compilers, so i need to rely on other >> people's >> report >> > > > Hello Tim, > > MSVC 9.0 complains about lockfree/fifo - does not like tagged_ptr to have > copy constructor: > > > > 1>e:\work\201003\10.lock_free\boost-lf\boost\atomic\detail\integral-casts.hpp(228) > : error C2621: member 'boost::detail::atomic::platform_atomic<T>::e' of > union 'boost::detail::atomic::platform_atomic<T>::<unnamed-tag>' has copy > constructor > > 1> with > > 1> [ > > 1> > T=boost::lockfree::tagged_ptr<boost::lockfree::detail::fifo<EU_DATA,boost::lockfree::caching_freelist_t,std::allocator<EU_DATA>>::node> > > 1> ] > > 1> e:\work\201003\10.lock_free\boost-lf\boost\atomic\detail\base.hpp(63) : > see reference to class template instantiation > 'boost::detail::atomic::platform_atomic<T>' being compiled > > 1> with > > 1> [ > > 1> > T=boost::lockfree::tagged_ptr<boost::lockfree::detail::fifo<EU_DATA,boost::lockfree::caching_freelist_t,std::allocator<EU_DATA>>::node> > > 1> ] > > 1> e:\work\201003\10.lock_free\boost-lf\boost\atomic.hpp(20) : see > reference to class template instantiation > 'boost::detail::atomic::internal_atomic<T>' being compiled > > 1> with > > 1> [ > > 1> > T=boost::lockfree::tagged_ptr<boost::lockfree::detail::fifo<EU_DATA,boost::lockfree::caching_freelist_t,std::allocator<EU_DATA>>::node> > > 1> ] > > 1> e:\work\201003\10.lock_free\boost-lf\boost\lockfree\fifo.hpp(202) : see > reference to class template instantiation 'boost::atomic<T>' being > compiled > > 1> with > > 1> [ > > 1> > T=boost::lockfree::tagged_ptr<boost::lockfree::detail::fifo<EU_DATA,boost::lockfree::caching_freelist_t,std::allocator<EU_DATA>>::node> > > 1> ] > > > > Though, after commening copy contructor, there is another error: > > > > 1>e:\work\201003\10.lock_free\boost-lf\boost\atomic\detail\integral-casts.hpp(228) > : error C2620: member 'boost::detail::atomic::platform_atomic<T>::e' of > union 'boost::detail::atomic::platform_atomic<T>::<unnamed-tag>' has > user-defined constructor or non-trivial default constructor > > 1> with > > 1> [ > > 1> > T=boost::lockfree::tagged_ptr<boost::lockfree::detail::fifo<EU_DATA,boost::lockfree::caching_freelist_t,std::allocator<EU_DATA>>::node> > > 1> ] > > 1> e:\work\201003\10.lock_free\boost-lf\boost\atomic\detail\base.hpp(63) : > see reference to class template instantiation > 'boost::detail::atomic::platform_atomic<T>' being compiled > > 1> with > > 1> [ > > 1> > T=boost::lockfree::tagged_ptr<boost::lockfree::detail::fifo<EU_DATA,boost::lockfree::caching_freelist_t,std::allocator<EU_DATA>>::node> > > 1> ] > > 1> e:\work\201003\10.lock_free\boost-lf\boost\atomic.hpp(20) : see > reference to class template instantiation > 'boost::detail::atomic::internal_atomic<T>' being compiled > > 1> with > > 1> [ > > 1> > T=boost::lockfree::tagged_ptr<boost::lockfree::detail::fifo<EU_DATA,boost::lockfree::caching_freelist_t,std::allocator<EU_DATA>>::node> > > 1> ] > > 1> e:\work\201003\10.lock_free\boost-lf\boost\lockfree\fifo.hpp(202) : see > reference to class template instantiation 'boost::atomic<T>' being > compiled > > 1> with > > 1> [ > > 1> > T=boost::lockfree::tagged_ptr<boost::lockfree::detail::fifo<EU_DATA,boost::lockfree::caching_freelist_t,std::allocator<EU_DATA>>::node> > > 1> ] > > > > Thanks, > > Andrey > > > > _________________________________________________________________ > Hotmail: Free, trusted and rich email service. > http://clk.atdmt.com/GBL/go/201469228/direct/01/ > _______________________________________________ > Unsubscribe & other changes: > http://lists.boost.org/mailman/listinfo.cgi/boost > > -- View this message in context: http://old.nabble.com/Status-of-%28boost%29-lockfree--tp27733138p29029331.h… Sent from the Boost - Dev mailing list archive at Nabble.com.

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