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Re: [Boost-users] seed for pseudo-random generator
by Neil Nelson 26 Aug '12

26 Aug '12

For a little more entropy you can add the seconds from time to the process PID (UUID). That will give you a difference each run at the seconds numeric scale that would tend to repeat at the PID cycle rate. You could add in microseconds from http://www.boost.org/doc/libs/1_51_0/doc/html/date_time/posix_time.html (Linux gettimeofday) for additional entropy. On Linux with some additional work you can use /dev/random and /dev/urandom (better). Neil Nelson > I create within a class the MT object with > > static boost::mt19937 m_random; > > so I need for a static variable for the initialization value, so I do this with > > boost::mt19937 tools::random::m_random( time(NULL) );= > > Now: My question is, can I use the time() value for initialization the MT object, so that the MT object returns values with a good entropie or > should I need another initialization value like a UUID of the OS? > > Because the time function (http://www.cplusplus.com/reference/clibrary/ctime/time/ ) returns a time_t value, so is this value good for initialization or should I need another value, if yes, which value if a good choice for > initialize the MT object?

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seed for pseudiorandom generator
by Kraus Philipp 26 Aug '12

26 Aug '12

Hello, I'm updating some algorithms and I need a tip for initialisation of the boost mersenne twister. I think the ctime is not a very good initialization. I think about a uuid value of the OS. I use also the non-deterministic generator, but I need an idea for the mersenne twister initialization. Do you have an idea? Thanks Phil

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Re: [Boost-users] Announce: Boost 1.51 installer for 32/64-bit Windows now available
by niXman 26 Aug '12

26 Aug '12

2012/8/24 niXman: > Why not to add libraries for MinGW? ping? -- Regards, niXman ___________________________________________________ Dual-target(32 & 64 bit) MinGW compilers for 32 and 64 bit Windows: http://sourceforge.net/projects/mingwbuilds/

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Re: [Boost-users] asio HTTP Server 3 example memory leak
by admin＠thefireflyproject.us 25 Aug '12

25 Aug '12

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Boost 1.44.0 with Python 2.7.1
by Sunil Thomas 25 Aug '12

25 Aug '12

Hi! I've built and installed successfull Python 2.7.1 that I've separately tested for an application with a boost-1.45.0 build that I also installed successfully. But for another application, I needed to build and install boost-1.44.0 and here I also I've been able to build/install boost successfully using the documentation (bootstrap/bjam after specifying prefix and with-python arguments). But when I build the (C++) application which invokes *Py_Init(...)*, I am getting the following error: *Linking CXX executable ../../../myapp_exec ../../../../../config/cmake/platforms/../../../../3rdparty/2012/package/rh5_x86_64_gcc-4.1.2/boost-1.44.0/lib/libboost_python-gcc41-1_44.so: undefined reference to `Py_InitModule4' collect2: ld returned 1 exit status gmake[2]: *** [myapp_exec] Error 1 * I am completely stuck here and would greatly appreciate any ideas to help understand and try to resolve this. I can easily do another boost-1.44.0 build with an older version of python to see if that helps. Thanks in advance for your time and please let me know if you have any questions. Thanks, -Sunil.

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Can we tell the version of Python used from boost-python pre-compiled library?
by Sunil Thomas 24 Aug '12

24 Aug '12

Hi! As the subject indicates, would appreciate, if someone can let me know how we can figure out the version of Python used in building a pre-compiled boost-python library? Thanks, -Sunil

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Re: [Boost-users] Announce: Boost 1.51 installer for 32/64-bit Windows now available
by Lemay.Steve 24 Aug '12

24 Aug '12

Visual C++ v11? It has released to manufacturing. - Sent via iPhone -----Original Message----- From: John Wiegley [johnw(a)boostpro.com<mailto:johnw@boostpro.com>] Sent: Thursday, August 23, 2012 10:07 PM Pacific Standard Time To: boost-announce(a)lists.boost.org; boost(a)lists.boost.org; boost-users(a)lists.boost.org Cc: Dave Abrahams; Luann Abrahams Subject: [Boost-users] Announce: Boost 1.51 installer for 32/64-bit Windows now available BoostPro is happy to announce that we now have free 32-bit and 64-bit installers for Windows available for download: http://www.boostpro.com/download This version libraries and/or DLLs for the following compilers: Visual C++ 7.1 (Visual Studio 2003) [32-bit only] Visual C++ 8.0 (Visual Studio 2005 SP1) Visual C++ 9.0 (Visual Studio 2008 SP1) Visual C++ 10.0 (Visual Studio 2010 SP1) -- John Wiegley BoostPro Computing Software Development Training http://www.boostpro.com Clang/LLVM/EDG Compilers C++ Boost _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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Announce: Boost 1.51 installer for 32/64-bit Windows now available
by John Wiegley 24 Aug '12

24 Aug '12

BoostPro is happy to announce that we now have free 32-bit and 64-bit installers for Windows available for download: http://www.boostpro.com/download This version libraries and/or DLLs for the following compilers: Visual C++ 7.1 (Visual Studio 2003) [32-bit only] Visual C++ 8.0 (Visual Studio 2005 SP1) Visual C++ 9.0 (Visual Studio 2008 SP1) Visual C++ 10.0 (Visual Studio 2010 SP1) -- John Wiegley BoostPro Computing Software Development Training http://www.boostpro.com Clang/LLVM/EDG Compilers C++ Boost

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[Review] Boost.Contract Review Starts Today(*)
by Dave Abrahams 23 Aug '12

23 Aug '12

The review period for Lorenzo Caminiti's Boost.Contract library runs from today through August 31st. I'm pleased to serve as review manager. ,----[ Important Notes ] | - Please begin your review's subject line with "[Review:Algorithms]" | - Please do not post your review or discussion as a reply to this | message. | - Please feel free to note any individual issues in the issue | tracker at https://sourceforge.net/apps/trac/contractpp/report/3 | (you'll need to log in at Sourceforge to add a ticket) and make | reference to them from your review. | - Please see below for *further* important notes `---- THE LIBRARY Boost.Contract implements Contract Programming (a.k.a., Design by Contracts) for C++. In addition, the library implements virtual specifiers, concept checking, and named parameters. Documentation: http://contractpp.sourceforge.net Source: http://sourceforge.net/projects/contractpp/files/latest/download All N1962 requirements and Eiffel features are supported by the library, among others: 1) Support for preconditions, postconditions, class invariants, block invariants, and loop variants. 2) Subcontract derived classes (with support for pure virtual functions and multiple inheritance). 3) Access expression old values and function return value in postconditions. 4) Optional compilation and checking of preconditions, postconditions, class invariants, block invariants, and loop variants. 5) Customizable actions on contract assertion failure (terminate by default but it can throw, exit, etc). This library is implemented for C++03 and it does not require C++11. Obviously, if the library is accepted, all macros will be prefixed by BOOST_... and other symbols will go under the boost::... namespace. Potential Interactions with Existing Boost Libraries ==================================================== This submission potentially interacts with the following existing Boost libraries: * parameter - http://boost.org/libs/parameter * static_assert - http://www.boost.org/libs/static_assert * MPL - http://www.boost.org/libs/mpl * Concept - http://www.boost.org/libs/concept_check Reviewers should consider these potential interactions. What to include in Review Comments ================================== - Keep your criticism constructive. Constructive criticism usually comes with specific suggestions for improvement. - If you identify problems along the way, please note if they are minor, serious, or showstoppers. - Please *do* vote on whether the library should be accepted. Everyone who takes the time to look at the library is qualified to vote, and every vote is valuable. - Other questions you might want to answer in your review: * What is your evaluation of the design? * What is your evaluation of the implementation? * What is your evaluation of the documentation? * What is your evaluation of the potential usefulness of the library? * Did you try to use the library? With what compiler? Did you have any problems? * How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? * Are you knowledgeable about the problem domain? (*) Well, OK, the review period officially started yesterday. Sorry for the delayed announcement -- Dave Abrahams BoostPro Computing Software Development Training http://www.boostpro.com Clang/LLVM/EDG Compilers C++ Boost

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build under MSVC with changed library name
by Kraus Philipp 23 Aug '12

23 Aug '12

Hello, I'm using Boost under MSVC (build from source). Can I change the output library name of the compiled libs? Under unix systems the libs are named: libboost_<sublib>.so Under Windows ( http://www.boost.org/doc/libs/1_50_0/more/getting_started/windows.html#or-s… ) there are a lot of other information in the filename. So I need only a special build type (no debug, mt, etc), so I would like to tell b2, that the name of the libraries are only boost_<sublib>.dll under Windows. How can I do this renaming on the compiling call? Thanks Phil

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