April 2005 - Boost-users - lists.preview.boost.org

Bug in type_traits (CVS checkout)
by Elvanör 16 Apr '05

16 Apr '05

Hello, I don't know if this mailing list is the best place to file a bug report (maybe better on the boost-developers mailing list, or on bugzilla if there is one) to get something fixed, but I have a problem with type_traits. I am not using type_traits directly, only through use of the BGL. I got the following error (which was posted in a previous message related to the BGL, before I discovered that the error was in type_traits - sorry!): In file included from /Users/elvanor/Development/boost/boost/type_traits/extent.hpp:14, from /Users/elvanor/Development/boost/boost/type_traits.hpp:61, from /Users/elvanor/Development/boost/boost/detail/numeric_traits.hpp:64, from /Users/elvanor/Development/boost/boost/iterator/counting_iterator.hpp: 9, from /Users/elvanor/Development/boost/boost/pending/integer_range.hpp:14, from /Users/elvanor/Development/boost/boost/graph/detail/adjacency_list.hpp: 18, from /Users/elvanor/Development/boost/boost/graph/adjacency_list.hpp:281, from /Users/elvanor/Development/probabilisticgraphicalmodels/src/ GraphAlgorithms.h:4, from /Users/elvanor/Development/probabilisticgraphicalmodels/src/ GraphAlgorithms.cc:7: /Users/elvanor/Development/boost/boost/type_traits/detail/ size_t_trait_def.hpp:33:1: "BOOST_TT_AUX_SIZE_T_TRAIT_DEF1" redefined In file included from /Users/elvanor/Development/boost/boost/type_traits/rank.hpp:14, from /Users/elvanor/Development/boost/boost/type_traits.hpp:60, from /Users/elvanor/Development/boost/boost/detail/numeric_traits.hpp:64, from /Users/elvanor/Development/boost/boost/iterator/counting_iterator.hpp: 9, from /Users/elvanor/Development/boost/boost/pending/integer_range.hpp:14, from /Users/elvanor/Development/boost/boost/graph/detail/adjacency_list.hpp: 18, from /Users/elvanor/Development/boost/boost/graph/adjacency_list.hpp:281, from /Users/elvanor/Development/probabilisticgraphicalmodels/src/ GraphAlgorithms.h:4, from /Users/elvanor/Development/probabilisticgraphicalmodels/src/ GraphAlgorithms.cc:7: /Users/elvanor/Development/boost/boost/type_traits/detail/ size_t_trait_def.hpp:33:1: this is the location of the previous definition I have looked in the file producing the error (multiple defines). It doesn't include a header guard, but the file specifically says that this is intentional. Thus, I am not qualified enough to get a quick fix for my situation, and this is a problem since I really need the CVS version of Boost for my project... I tried replacing the whole type_traits directory from CVS with the one from Boost 1.32 (because i hadn't any problems with typetraits and Boost Graph Library until today, when I replaced 1.32 with CVS) , but I then get tons of compiler errors when compiling my project so obviously it isn't a good idea. Jean-Noël Rivasseau

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RE: Boost thread problem
by C. Michailidis 16 Apr '05

16 Apr '05

> I think the bug might lie in the copy-assignment operator for CFXTrade. > std::vector<CFXTrade> may use that whereas std::queue<CFXTrade> > probably will not. This is a very keen observation Ben! Whether or not this is the case, it certainly is motivation to make sure that sample code posted to the list is free from all references to proprietary code. In addition, I would say that before submitting code samples to boost-users we should make every effort possible to simplify the sample to the bare minimum required to reproduce the bug/problem in question. We should also consider that by submitting proprietary code to the list, we may be in violation of confidentiality agreements had w/ our employers or customers. Remember, this list is archived and could (theoretically) be the kind of proof an employer/customer needs to fire/sue you. After all, the boost-users list is about helping users w/ boost - not with 3rd party (and possibly proprietary) code. I think we all know that the quality of open-source peer-reviewed codes can be dramatically higher than that of closed-source; can boost-users really afford to help track down a multitude of problems in a potentially huge number of proprietary apps/libs? Oh, and always use protection when having promiscuous sex! Signed, a hard-liner ;-)

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RE: [Boost-users] RE: Boost thread problem
by Sliwa, Przemyslaw (London) 15 Apr '05

15 Apr '05

Hi, Thanks for help, On a Linux box I have to link against libc_r too? Probably yes, but could you confirm this? Thanks for help, Pshemek -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of C. Michailidis Sent: 15 April 2005 00:02 To: boost-users(a)lists.boost.org Subject: [Boost-users] RE: Boost thread problem > It seems the usage of the vector cases problems with the multithreaded programs on the multiprocessor machines. > I have changed it to queue and the bug has been resolved. I cannot reproduce it now. Huh, that's interesting! I suppose it may no longer be a major issue for you then (even though vectors and queues have different algorithms under the hood). Because you mentioned that the problem seems to be limited to true SMP systems, I tried your code again (this time on a dual cpu system) and I still couldn't reproduce it. I must admit that the process didn't seem to bounce between cpus though, so perhaps something is lost in the shuffle in that regard. The dual cpu system was configured similarly to the first machine that I tried it on (FreeBSD 5.3 + boost 1.32.0_2). The first machine (although not a 'true' smp system) is using hyperthreading w/ an SMP kernel so as far as the OS is concerned it too is a multiprocessor machine. If you still want to isolate the problem that you *were* having (using vector) then you may be interested in the details of thread-safe CRTs. The "-lc_r" indicates that (on FreeBSD) the re-entrant C library (i.e. thread-safe) should be linked against. On Windows I believe the analog is called something like 'msvcrtmt.dll' (C RunTime - MultiThreaded). I would hope that the .NET compiler uses this 'msvcrtmt.dll' when 'multithreaded support is on', but I couldn't tell you for sure. If you're statically linking, I think the name is just 'msvcrtmt.lib'. The thread-unsafe version doesn't have 'mt' appended to the library filename. The glamour of MSFT development has been largely replaced with a desire to actually get stuff working so... most of my development has been on FreeBSD lately. Therefore some of this MSFT specific information may not be exactly correct. Oh how the cobwebs accumulate! Anyway, you could probably double check for the 'msvcrtmt' library by looking at the detailed linker settings, that is if my suspicion concerns you and you're still interested in isolating the problem. In any case, I'm glad you found a work-around! C. Michailidis Balston Research LLC _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users -------------------------------------------------------- If you are not an intended recipient of this e-mail, please notify the sender, delete it and do not read, act upon, print, disclose, copy, retain or redistribute it. Click here for important additional terms relating to this e-mail. http://www.ml.com/email_terms/ --------------------------------------------------------

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boost::mpl::vector example?
by Stephen Gross 15 Apr '05

15 Apr '05

Hi all... I'm trying to learn more about mpl vectors. I've found plenty of *reference* information, but no straightforward tutorials / examples. Does anyone know of any? Thanks, --Steve Stephen Gross Case Western School of Medicine Cleveland, OH "The large print giveth and the small print taketh away." - Tom Waits

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RE: Boost thread problem
by C. Michailidis 15 Apr '05

15 Apr '05

> On a Linux box I have to link against libc_r too? > Probably yes, but could you confirm this? Your pthread man page is probably a better authority than I am ;-) C. Michailidis Balston Research LLC

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Building boost on AIX with GCC -- pthread problems
by Dan Katz 15 Apr '05

15 Apr '05

Hi - I'm trying to build boost on an AIX box using GCC, and am having pthread issues. In particular: ------------------------------------------------------------------------ $ uname -a AIX dev-app-a00 2 5 00089FFC4C00 unknown unknown AIX $ gcc -v Reading specs from /usr/local/lib/gcc-lib/powerpc-ibm-aix5.1.0.0/3.3.3/specs Configured with: ../gcc-3.3.3/configure --disable-nls Thread model: aix gcc version 3.3.3 $ bjam -v Boost.Jam Version 3.1.10. OS=AIX. [... elided copyright stuff ...] $ bjam [... elided PYTHON stuff here ...] ...found 7231 targets... ...updating 840 targets... gcc-C++-action bin/boost/libs/date_time/build/libboost_date_time.so/gcc/debug/shared-linkable-true/greg_month.o In file included from /home/dkatz/dev/Engine/Agorai/Boost/boost/detail/lwm_pthreads.hpp:20, from /home/dkatz/dev/Engine/Agorai/Boost/boost/detail/lightweight_mutex.hpp:92, from /home/dkatz/dev/Engine/Agorai/Boost/boost/detail/shared_count.hpp:28, from /home/dkatz/dev/Engine/Agorai/Boost/boost/shared_ptr.hpp:26, from /home/dkatz/dev/Engine/Agorai/Boost/boost/date_time/gregorian/greg_month.hpp:14, from /home/dkatz/dev/Engine/Agorai/Boost/libs/date_time/src/gregorian/greg_month.cpp:14: /usr/include/pthread.h:554: error: `pthread_rwlock_t' was not declared in this scope /usr/include/pthread.h:554: error: parse error before `)' token [... lots more pthread problems of this sort ...] ^C...interrupted $ ------------------------------------------------------------------------ Should I be configuring the gcc build with some other thread model maybe? Any insight would be useful. I've been googling around a bit, but haven't found much for this particular issue... Thanks. Dan

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How to install only subset of header files
by Marcel Loose 15 Apr '05

15 Apr '05

Hi, Last week I mailed a question about how to install only a few libraries, but I did'nt get any replies. Maybe I didn't clearly enough explain what I wanted to ask. So I'll try again. Is it possible to only install a subset of all boost *header files*? More specifically, only the header files that are needed when installing one or more libraries. For example, suppose I only want to use Boost Smart Pointers and Boost.Threads. I would like Bjam to only install the header files that are needed for those two libraries, not *all* Boost header files. I know that you can and should use the bjam option --with-<library>, but, AFAIK, this only works for the library, not for the header files. Any help would be appreciated. Kind regards, Marcel Loose.

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swapping keys in multiindex
by David Gruener 15 Apr '05

15 Apr '05

Hello, how can one swap keys in an *ordered* index of a multi index container? Well, you cannot say something like: blah.modify_key(blah.find(foo1), _1 = foo2); // from now index contains one element fewer, since // keys must be uniq blah.modify_key(blah.find(foo2), _1 = foo1); I dind't found a way in the manual to swap directly. --David

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Question About Thread-Safety of boost::bind Library
by john.davison＠americas.bnpparibas.com 15 Apr '05

15 Apr '05

When I see placeholder variables ("_1", "_2", etc.) in Boost.Bind, the first thing that comes to my mind is, what are the effects of this on reentrancy and thread-safety in the Boost.Bind library? What must one watch out for when attempting to use the Boost.Bind library in a multithreaded program? Is it possible to make effective use of the Boost.Bind library while ignoring the ("_1", "_2", etc.) placeholder variables? The "Proposal to Add an Enhanced Binder to the Library Technical Report" of 2003-02-28 doesn't address these concerns, so I'm asking them here. Thanks. This message and any attachments (the "message") is intended solely for the addressees and is confidential. If you receive this message in error, please delete it and immediately notify the sender. Any use not in accord with its purpose, any dissemination or disclosure, either whole or partial, is prohibited except formal approval. The internet can not guarantee the integrity of this message. BNP PARIBAS (and its subsidiaries) shall (will) not therefore be liable for the message if modified. --------------------------------------------- Ce message et toutes les pieces jointes (ci-apres le "message") sont etablis a l'intention exclusive de ses destinataires et sont confidentiels. Si vous recevez ce message par erreur, merci de le detruire et d'en avertir immediatement l'expediteur. Toute utilisation de ce message non conforme a sa destination, toute diffusion ou toute publication, totale ou partielle, est interdite, sauf autorisation expresse. L'internet ne permettant pas d'assurer l'integrite de ce message, BNP PARIBAS (et ses filiales) decline(nt) toute responsabilite au titre de ce message, dans l'hypothese ou il aurait ete modifie.

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better patch for auto_unit_test.hpp "enhancement"
by Oliver Schoenborn 15 Apr '05

15 Apr '05

This is the same as last (http://article.gmane.org/gmane.comp.lib.boost.user/10508) except that it fixes a problem that would prevent a multi-unit auto unit test to run (i.e. if one of the test files did NOT have a BOOST_AUTO_TEST_MAIN). $ diff -u boost_1_32_0/boost/test/auto_unit_test.hpp patches/boost-1_32/boost/test/auto_unit_test.hpp --- /home/oschoenborn/downloads/boost_1_32_0/boost/test/auto_unit_test.hpp Mon Jul 19 09:12:40 2004 +++ /c/Boost/include/boost-1_32/boost/test/auto_unit_test.hpp Thu Apr 7 16:16:19 2005 @@ -19,6 +19,17 @@ // Boost.Test #include <boost/test/unit_test.hpp> +#define BOOST_AUTO_TEST_SUITE_DEFAULT_NAME "Auto Unit Test" +#ifdef BOOST_AUTO_TEST_MAIN + #ifndef BOOST_AUTO_TEST_SUITE_NAME + #define BOOST_AUTO_TEST_SUITE_NAME suiteName(BOOST_AUTO_TEST_MAIN) + #endif +#else + #ifndef BOOST_AUTO_TEST_SUITE_NAME + #define BOOST_AUTO_TEST_SUITE_NAME BOOST_AUTO_TEST_SUITE_DEFAULT_NAME + #endif +#endif + // ************************************************************************** // // ************** auto_unit_test_registrar ************** // // ************************************************************************** // @@ -27,10 +38,17 @@ namespace unit_test { namespace ut_detail { +inline const char* +suiteName(const char* name = NULL) +{ + return name ? name : BOOST_AUTO_TEST_SUITE_DEFAULT_NAME; +} + inline boost::unit_test::test_suite* auto_unit_test_suite() { - static boost::unit_test::test_suite* inst = BOOST_TEST_SUITE( "Auto Unit Test" ); + static boost::unit_test::test_suite* inst + = BOOST_TEST_SUITE( BOOST_AUTO_TEST_SUITE_NAME ); return inst; }

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