June 2007 - Boost - lists.preview.boost.org

issue in mapped_file.hpp
by Igor Okulist 07 Jun '07

07 Jun '07

Appears as an issue in mapped_file.hpp if used with std::ios::in. Issue appears as a copy paste problem from mapped_file_source class. Issue manifest that const_begin() always return 0 (zero) and const_end() return 0+size(). To correct the problem const_data() method shall be called instead of data(). Below is diff with current version: --- \boost\include\boost-1_33_1\boost\iostreams\device\mapped_file.hpp.org +++ \boost\include\boost-1_33_1\boost\iostreams\device\mapped_file.hpp @@ -191,9 +191,9 @@ } const char* const_data() const { return delegate_.data(); } iterator begin() const { return data(); } - const_iterator const_begin() const { return data(); } + const_iterator const_begin() const { return const_data(); } iterator end() const { return data() + size(); } - const_iterator const_end() const { return data() + size(); } + const_iterator const_end() const { return const_data() + size(); } Please enter into bug database (do i need to subscribe to Track to do it myself?). Thanks, Igor

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[fusion] implementing distance_impl<>
by Eric Niebler 06 Jun '07

06 Jun '07

In proto, I have a specialization of fusion::extension::distance_impl<> that looks like this: template<> struct distance_impl<proto::proto_ref_iterator_tag> { template<typename IteratorFrom, typename IteratorTo> struct apply { typedef mpl::long_< IteratorTo::index::value - IteratorFrom::index::value > type; }; }; This worked fine until fairly recently. But now there is code in algorithm/iteration/detail/for_each.hpp like this: for_each_unrolled< result_of::distance<begin, end>::value >::call(fusion::begin(seq), f); The problem is with distance<begin, end>::value. My distance_impl<> doesn't provide a nested value. It provides a nested type. If this were distance<begin, end>::type::value, it works. It also works if I change my distance_impl<> specialization, but I don't think I should have to. Bug? -- Eric Niebler Boost Consulting www.boost-consulting.com

1 0

Warning in multi_index_container/1.34.0/GCC-4.2.0
by Richter, Jörg 06 Jun '07

06 Jun '07

Compiling some code using Boost 1.34.0 and GCC 4.2.0, I get this warning with -O1: multi_index/ordered_index.hpp: In member function ...multi_index_base_type...insert_ multi_index/ordered_index.hpp:566 'inf.side' may be used uninitialized in this function It looks like the only position where inf.side is not initialized is line 830. But I can't tell if line 574 will be executed in this case (where inf.side is used) But I hope you can fix this warning in the next release. Joerg

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Boost inspection notification (2007-06-06/RC_1_34_0) *LC*
by Rene Rivera 06 Jun '07

06 Jun '07

Boost Inspection Report Run Date: 16:08:23 UTC, Wednesday 06 June 2007 An inspection program <http://www.boost.org/tools/inspect/index.html> checks each file in the current Boost CVS for various problems, generating this as output. Problems detected include tabs in files, missing copyrights, broken URL's, and similar misdemeanors. Totals: 11453 files scanned 909 directories scanned (including root) 1059 problems reported Problem counts: 661 files missing Boost license info or having wrong reference text 398 files missing copyright notice Summary: any (1) archive (1) build (68) concept_check (22) conversion (5) doc (1) filesystem (2) function (1) graph (1) inspect (1) integer (9) lambda (10) libs (6) logic (2) math (1) more (13) mpl (417) multi_array (13) numeric (188) optional (1) people (4) program_options (35) property_map (15) ptr_container (8) python (14) rational (5) regex (4) regression (118) release (2) serialization (16) signals (2) smart_ptr (8) test (3) timer (1) tr1 (2) tuple (5) utility (12) variant (42) Details: *L* missing Boost license info, or wrong reference text *C* missing copyright notice |any| libs/any/doc/ any.xml: *L* |archive| boost/archive/detail/ utf8_codecvt_facet.hpp: *L* |build| tools/build/v2/build/ build-request.jam: *L* modifiers.jam: *L* tools/build/v2/doc/ Jamfile.v2: *C* *L* 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[interprocess] Minor documentation errors
by Matt Doyle 06 Jun '07

06 Jun '07

Hi Ion, If your going to post an updated version here are a couple of doc errors I encountered. In the section about Named and Anonymous Synchronization Mechanisms, the comments and code are swapped. //Open the synchronization utility. If it does not previously //exist, throws an error. NamedUtility(open_or_create, ...) //Open the synchronization utility. If it does not previously //exist, create it. NamedUtility(open_only, ...) And in the section about Mutexes, I think, the second occurrence of interprocess_mutex was supposed to be interprocess_recursive_mutex #include <boost/interprocess/sync/interprocess_mutex.hpp> boost::interprocess::interprocess_mutex: A non-recursive, anonymous mutex that can be placed in shared memory or memory mapped files. #include <boost/interprocess/sync/interprocess_recursive_mutex.hpp> boost::interprocess::interprocess_mutex: A recursive, anonymous mutex that can be placed in shared memory or memory mapped files. Thanks, Matt P.S. This is a really great library! Good work. -- Matt Doyle Advanced Motion Control To the optimist, the glass is half full. To the pessimist, the glass is half empty To the engineer, the glass is twice as big as it needs to be. //move the out going tag out of the way Scanned by McAfee GroupShield {X3BTB534}

2 1

Languishing review requests
by Tom Brinkman 06 Jun '07

06 Jun '07

Thanks John for starting this thread. Our preference has always been to assign the "Review Manager" role to those that have already submitted a library, or at-least an active contributer to boost in some capacity. If no one with this background volunteers, and the proposed library has had sufficient time on the list, we would make the "Review Manager" role available to others. Typically, we would do a search on the mailing list to get a feel for how actively the volunteer has participated in some previous discussions. Often, we will read their comments and make an assessment if they would be a good match for a given library. We have tried to set the "bar" pretty high. It should also be stated that the library author has the responsibility to generate interest in his library. Just having the library added to the "Review Queue" is not enough. He must regularly post comments to this list about issues that are relevant to his library and of interest to boost developers. He should attempt to create a small community of people that have an interest in having the library added. He must be an advocate for his library and tell "us" why it would be a good addition. Successfully submitting a library to boost can be a career changing accomplishment for some. If a library has been on the queue for over six months, and no one has steped up to volunteer to be the "review-manager", there could be a problem with the library and it may not ready for review. Every situation is different. We have no difficulty finding "qualified" review managers for the larger high-profile libraries. However, its the smaller, obscure libraries, that dont have an obvious use-case that have troubles. A little bit of "salesmanship" by the authors of the smaller libraries is often all that is needed to get other developers to take a look at it. Also, many of us like to read discussion threads about the proposed libraries well in advance of the actual review. As far as I can tell, very little of this has been done for the libraries that are currently languashing in the "review queue". In the case of John Phillips, even though he hasn't sumbitted a library; (if I recall correctly), he is a Professor of Mathmatics and has contributed regularly to many discussion on various topics on the boost mailing list. His reviews have always been among the most thoughtful and relevant. We could only hope that all "reviews" are handeled as well his. We are fortunate that he has also voluntered to be the "Review Manager" for the upcoming "review" of Eric Neibler's "Time-series" library. We have had many discussions behind the scenes about how to improve the review process. Hopefully, this thread will start another such discussion.

5 6

Boost inspection notification (2007-06-06/RC_1_34_0) *X*
by Rene Rivera 06 Jun '07

06 Jun '07

Boost Inspection Report Run Date: 16:08:16 UTC, Wednesday 06 June 2007 An inspection program <http://www.boost.org/tools/inspect/index.html> checks each file in the current Boost CVS for various problems, generating this as output. Problems detected include tabs in files, missing copyrights, broken URL's, and similar misdemeanors. Totals: 11453 files scanned 909 directories scanned (including root) 193 problems reported Problem counts: 0 files with invalid line endings 0 bookmarks with invalid characters 3 invalid urls 101 broken links 21 unlinked files 22 file/directory names issues 2 files with tabs 9 violations of the Boost min/max guidelines 35 usages of unnamed namespaces in headers (including .ipp files) Summary: archive (3) bind (1) boost-root (1) build (1) date_time (1) doc (2) filesystem (33) graph (3) iostreams (2) lambda (3) math (8) more (4) mpl (4) multi_array (2) ptr_container (1) python (8) regex (1) regression (32) serialization (1) test (81) type_traits (1) Details: *R* invalid (cr only) line-ending *A* invalid bookmarks, invalid urls, broken links, unlinked files *N* file/directory names issues *T* tabs in file *M* uses of min or max that have not been protected from the min/max macros, or unallowed #undef-s *U* unnamed namespace in header |archive| 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libs/filesystem/doc/tr2_proposal.html: *A* invalid URL (hardwired file): file:///C|/boost/site/libs/filesystem/doc/operations.htm#complete_note |graph| boost/graph/relax.hpp: *T* libs/graph/example/file_dependencies.cpp: *M* violation of Boost min/max guidelines on line 139 libs/graph/test/serialize.cpp: *T* |iostreams| libs/iostreams/doc/concepts/multi-character.html: *A* unlinked file libs/iostreams/doc/installation.html: *A* broken link: ../../../tools/build/v1/build_system.htm |lambda| boost/lambda/core.hpp: *U* unnamed namespace at line 62 boost/lambda/detail/lambda_functors.hpp: *U* unnamed namespace at line 25 boost/lambda/exceptions.hpp: *U* unnamed namespace at line 24 |math| libs/math/test/common_factor_test.cpp: *M* violation of Boost min/max guidelines on line 146 *M* violation of Boost min/max guidelines on line 147 *M* violation of Boost min/max guidelines on line 193 *M* violation of Boost min/max guidelines on line 194 |more| more/cvs.html: *A* unlinked file 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[interprocess] Interprocess build fails on 64-bit MSVC 8
by Aaron W. LaFramboise 06 Jun '07

06 Jun '07

On a 64-bit build on MSVC 8 (CL 14.00.50727.762 for x64) with Boost CVS 2007-06-03, building a program that uses Boost.Interprocess fails. Please see the attachment at the end of the message for the compiler output. The problem is in rbtree_best_fit::SizeHolder: > unsigned m_prev_size : sizeof(std::size_t)*CHAR_BIT - 1; 'unsigned' which is 32-bit is not large enough to hold a 64-bit size_t. If I change 'unsigned' to 'std::size_t' compile is successful without any other errors. When linking, I get: aaron.obj : error LNK2019: unresolved external symbol __imp_InterlockedCompareExchange referenced in function "long __cdecl boost::interprocess::winapi::interlocked_compare_exchange(long volatile *,long,long)" (?interlocked_compare_exchange@winapi@interprocess@boost@@YAJPECJJJ@Z) I was able to fix this by using BOOST_INTERLOCKED_COMPARE_EXCHANGE instead of InterlockedCompareExchange in winapi::interlocked_compare_exchange() in w32_api.h. I had to make a similar translation for InterlockedExchange. With these changes, it appears to compile and link. I can't guarantee yet that it actually works, though. 1>include\boost/interprocess/mem_algo/rbtree_best_fit.hpp(83) : error C2034: 'boost::interprocess::rbtree_best_fit<MutexFamily,VoidPointer>::SizeHolder::m_prev_size' : type of bit field too small for number of bits 1> include\boost/interprocess/mem_algo/rbtree_best_fit.hpp(80) : see reference to class template instantiation 'boost::interprocess::rbtree_best_fit<MutexFamily,VoidPointer>::SizeHolder' being compiled 1> include\boost/interprocess/mem_algo/rbtree_best_fit.hpp(282) : see reference to class template instantiation 'boost::interprocess::rbtree_best_fit<MutexFamily,VoidPointer>' being compiled 1>include\boost/interprocess/mem_algo/rbtree_best_fit.hpp(85) : error C2034: 'boost::interprocess::rbtree_best_fit<MutexFamily,VoidPointer>::SizeHolder::m_size' : type of bit field too small for number of bits 1>include\boost/interprocess/mem_algo/rbtree_best_fit.hpp(83) : error C2034: 'boost::interprocess::rbtree_best_fit<MutexFamily>::SizeHolder::m_prev_size' : type of bit field too small for number of bits 1> with 1> [ 1> MutexFamily=boost::interprocess::mutex_family 1> ] 1> include\boost/interprocess/mem_algo/rbtree_best_fit.hpp(91) : see reference to class template instantiation 'boost::interprocess::rbtree_best_fit<MutexFamily>::SizeHolder' being compiled 1> with 1> [ 1> MutexFamily=boost::interprocess::mutex_family 1> ] 1> include\boost/interprocess/mem_algo/rbtree_best_fit.hpp(269) : see reference to class template instantiation 'boost::interprocess::rbtree_best_fit<MutexFamily>::block_ctrl' being compiled 1> with 1> [ 1> MutexFamily=boost::interprocess::mutex_family 1> ] 1> include\boost/interprocess/detail/managed_memory_impl.hpp(87) : see reference to class template instantiation 'boost::interprocess::rbtree_best_fit<MutexFamily>' being compiled 1> with 1> [ 1> MutexFamily=boost::interprocess::mutex_family 1> ] 1> include\boost/interprocess/managed_windows_shared_memory.hpp(54) : see reference to class template instantiation 'boost::interprocess::detail::basic_managed_memory_impl<CharType,MemoryAlgorithm,IndexType>' being compiled 1> with 1> [ 1> CharType=char, 1> MemoryAlgorithm=boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, 1> IndexType=boost::interprocess::iset_index 1> ] 1> aaron.hpp(85) : see reference to class template instantiation 'boost::interprocess::basic_managed_windows_shared_memory<CharType,AllocationAlgorithm,IndexType>' being compiled 1> with 1> [ 1> CharType=char, 1> AllocationAlgorithm=boost::interprocess::rbtree_best_fit<boost::interprocess::mutex_family>, 1> IndexType=boost::interprocess::iset_index 1> ] 1>include\boost/interprocess/mem_algo/rbtree_best_fit.hpp(85) : error C2034: 'boost::interprocess::rbtree_best_fit<MutexFamily>::SizeHolder::m_size' : type of bit field too small for number of bits 1> with 1> [ 1> MutexFamily=boost::interprocess::mutex_family 1> ]

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Computing Random Points on Sphere
by more effective thinking in the exceptional C++ programming language 06 Jun '07

06 Jun '07

Dear, I'm a newcomer on the boost list. I subscribed to share the results of my experiments on picking random points on sphere. This procedure is often a bottleneck for very fast Monte-Carlo simulations of physical process where you must pick vectors in random directions. I compiled a document that explain the experiments and the results. The conclusion contains some propositions to modify boost::random_on_sphere and I would like to know if a new implementation following the presented ideas would be welcome. Colas Schretter

4 6

[serialization] 1.34.0 bug
by Sergey Skorniakov 06 Jun '07

06 Jun '07

basic_binary_iprimitive.hpp, basic_binary_iprimitive<Archive, Elem, Tr>::load_binary: std::streamsize s = count / sizeof(Elem); std::streamsize scount = m_sb.sgetn( static_cast<Elem *>(address), s ); if(count != static_cast<std::size_t>(s)) boost::throw_exception( archive_exception(archive_exception::stream_error) ); If sizeof(Elem) != 1, exception will be thrown. Looks like wide binary iarchives was never been tested.

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