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

[Serialization] seg fault with BOOST_CLASS_EXPORT
by fab 01 Feb '10

01 Feb '10

Hi, Simply by adding BOOST_CLASS_EXPORT(MyClass), all executables, unit tests, etc. which compile with this class failed at the end of the execution with a seg fault. All the process is done but the application exit with a seg fault. I encounter this problem with some classes and not with others... I don't understand where the error comes from and I don't arrived to reproduce on a simple test. Best regards, Fabien Castan Program received signal SIGSEGV, Segmentation fault. strcmp () at ../sysdeps/i386/i686/strcmp.S:40 40 ../sysdeps/i386/i686/strcmp.S: Aucun fichier ou dossier de ce type. in ../sysdeps/i386/i686/strcmp.S Current language: auto The current source language is "auto; currently asm". (gdb) bt #0 strcmp () at ../sysdeps/i386/i686/strcmp.S:40 #1 0x004ed2c1 in boost::serialization::extended_type_info::key_unregister() () from /usr/lib/libboost_serialization.so.1.40.0 #2 0x004ed3e4 in boost::serialization::extended_type_info::~extended_type_info() () from /usr/lib/libboost_serialization.so.1.40.0 #3 0x004edc98 in boost::serialization::detail::extended_type_info_typeid_0::~extended_type_info_typeid_0() () from /usr/lib/libboost_serialization.so.1.40.0 #4 0x0805861b in boost::serialization::extended_type_info_typeid<tuttle::host::ofx::attribute::OfxhClipDescriptor>::~extended_type_info_typeid() ( this=0x8189470) at /usr/include/boost/smart_ptr/detail/shared_count.hpp:221 #5 0x080586e5 in boost::serialization::detail::singleton_wrapper<boost::serialization::extended_type_info_typeid<tuttle::host::ofx::attribute::OfxhClipDescriptor> >::~singleton_wrapper() (this=0x8189470) at /usr/include/boost/smart_ptr/detail/shared_count.hpp:221 #6 0x0054f05f in __run_exit_handlers (status=0, listp=0x661304, run_list_atexit=true) at exit.c:78 #7 0x0054f0cf in *__GI_exit (status=0) at exit.c:100 #8 0x00536b5e in __libc_start_main (main=0x80561fa <main>, argc=1, ubp_av=0xbffff3a4, init=0x8126f80 <__libc_csu_init>, fini=0x8126f70 <__libc_csu_fini>, rtld_fini=0x198d20 <_dl_fini>, stack_end=0xbffff39c) at libc-start.c:252 #9 0x08052501 in _start () at ../sysdeps/i386/elf/start.S:119

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[thread] why crash launching a thread?
by David M. Cotter 01 Feb '10

01 Feb '10

i'm launching a new thread from an existing background thread, BUT it is crashing. i don't know if it happens often yet, but was wondering what could possibly cause this? Thread 10 Crashed: 0 libSystem.B.dylib 0x96ce435d usleep$NOCANCEL$UNIX2003 + 0 1 libSystem.B.dylib 0x96d05a50 abort + 105 2 libstdc++.6.dylib 0x96bb2fda __gnu_cxx::__verbose_terminate_handler() + 433 3 libstdc++.6.dylib 0x96bb117a __cxxabiv1::__terminate(void (*)()) + 10 4 libstdc++.6.dylib 0x96bb11ba __cxxabiv1::__unexpected(void (*)()) + 0 5 libstdc++.6.dylib 0x96bb12b8 __gxx_exception_cleanup(_Unwind_Reason_Code, _Unwind_Exception*) + 0 6 libboost_thread.dylib 0x006af933 boost::thread::start_thread() + 195 7 com.kjams.kjams 0x001281d1 CThreads::Fork(APP_ThreadType, long (*)(void*, long), long (*)(void*, long), void*, char const*) + 1521 8 com.kjams.kjams 0x0012858b CT_Preemptive::call(char const*) + 91 9 com.kjams.kjams 0x00139fc2 CSpooler::Fork_Spool(CSpooler*, bool) + 290 10 com.kjams.kjams 0x0027fd05 CSongImporter::EncodeSong(CSI_PersistantQueData*, CSpooler*) + 1109

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BoostCon 2010 preliminary program
by Hartmut Kaiser 01 Feb '10

01 Feb '10

Hey all, please find below a list of accepted submissions to BoostCon 2010. A tentative, fully scheduled program will be available soon. The keynote will be held by Maurice Herlihy. Maurice Herlihy is a computer scientist active in the field of multiprocessor synchronization. Herlihy has contributed to the design of concurrent algorithms, and in particular to the exposition and quantification of the properties and uses of hardware synchronization operations. He is currently (2009) a professor of computer science at Brown University and one of the leading visionaries in the field of transactional memory. Following up on this keynote we will have a full day sessions and panel discussion where we plan for 4 different groups to talk about their work on transactional memory (Mark Moir (Sun), Tatiana Shpeisman (Intel), Michael Wong (IBM), Vicente Botet (TBoost.STM)) In addition we have a high quality, distinctive, fully packed, and very diverse list of accepted talks: João P. R. Abecasis: Cross-platform development with Qt and Boost Ruediger Berlich: Distributed parametric optimization with the Geneva library Dean Michael Berris: Techniques in Flexible Header-Only C++ Network Library Implementations Michael Caisse: Using Spirit 2.1: Qi and Karma An Asio Based Flash XML Server Marshall Clow: A (proposed) MIME library for Boost Tony Van Eerd: The Basics of Lock-free Programming Joel Falcou and Jean-Thierry Lapresté: The Numerical Template Toolbox: BOOST'ed Generic Array Library for High Performance Computing Joachim Faulhaber: Boost.Alabaster (proposed): A Law Based Tester Barend Gehrels, Bruno Lalande and Mateusz Loskot: Generic Programming for Geometry Justin Gottschlich: TBoost.STM's Engine: An Efficient Software Transactional Memory Using Commit-Time Invalidatio Douglas Gregor: Clang: An Open-Source C++ Compiler Library C++ Tool-Builders Workshop Christophe Henry: Tutorial: The Meta State Machine Library V2 Ken Joyner: Revisiting Guidelines to Using Exceptions in C++ Hartmut Kaiser and Joel de Guzman: RAD Spirit Spirit History and Evolution Zachary Laine and Matt Calabrese: Instantiations Must Go! Stephan Lavavej: Data Structure Visualizers in Visual Studio 2010 Nevin Liber: Type Erasure Eric Niebler: Practical DSEL Design with Proto Roshan Naik: Logic Paradigm for C++ Stjepan Rajko: Patterns Library: a generic library for modeling, recognition, and synthesis of sequential patterns Gennadiy Rozental: Production use of Boost.Test David Sankel: Functional Programming in C++ Jeremy Siek: Generic Programming and the Boost Graph Library Robert Ramey: Is Boost Broken? Michael Wong: C++0x Update C++0x Concurrency We believe this program is reason enough to come to BoostCon this year (Aspen, CO, USA, May 10-14th)! For registration, accommodation, and more information please visit the conference website at http://www.boostcon.com. Please note the reduced early registration fee! Regards Hartmut Program Chair BoostCon 2010 --------------- Meet me at BoostCon www.boostcon.com

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[log] Release Candidate 4 released
by Andrey Semashev 01 Feb '10

01 Feb '10

I'm proud to announce that I've released the fourth candidate of Boost.Log for the review. There were many improvements since the passed year of development. Many of them reflect the discussion of RC3. Here's a short list of major changes: * Substantial documentation improvement. The tutorial section has been reorganized. * Removed rotating file stream. As a replacement, a new file sink has been added, which allows to achieve the same results ans adds a few more features. It is now possible to collect rotated log files in a dedicated directory. * Added a new multifile sink backend. * Added a new ordering asynchronous sink frontend. * The syslog sink backend is now supported on Windows, too. The sink no longer requires native support for POSIX API for syslog, but is able to send syslog packets to a remote server over UDP. * Added support for scoped logging. There is now a distinct log record entity, which is returned by the core as a result of filtring. * Added support for exception control. * Added a new mode of logging, called trivial logging. The more complete change log is available here: http://tinyurl.com/ybcghuf The library with docs, tests and examples has been updated in Boost.Vault: http://tinyurl.com/cm9lum There's SVN repository available on SourceForge project page: http://tinyurl.com/ye23wyh The docs are also available online here: http://tinyurl.com/5e4fd7 Comments are welcome.

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Boost.Atomic request for review/inclusion
by Helge Bahmann 01 Feb '10

01 Feb '10

Hello, First of all I would like to thank for the comments that I have received so far, I have incorporated almost all of them I think. Boost.Atomic is now in a form that I consider calling it a release. It has support for "true" atomic variables on: - gcc/x86, 32-bit (tested on Linux, FreeBSD) - gcc/x86, 64-bit (tested on Linux) - gcc/powerpc32 (tested on Linux, Mac OS X) - gcc/powerpc64 (untested) - generic Win32 (tested with Visual Studio Express on Win XP) For all others it falls back gracefully to locked operation. There is proper quickbook documentation, including a hopefully illustrative example section. If you have an unsupported platform, contact me and I will attempt to provide support for it (usually it is just a matter of testing). Otherwise I would like to request considering the library for inclusion and appreciate any further comments. Everything available as usual at: http://www.chaoticmind.net/~hcb/projects/boost.atomic Best regards Helge

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[1.42.0] OK to build RC?
by Beman Dawes 01 Feb '10

01 Feb '10

If anyone knows of any 1.42.0 showstoppers, please post something right away. Otherwise we will start to put a release candidate together in a couple of hours. --Beman

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