February 2011 - Boost-users - lists.preview.boost.org

Subject: Formal Review of Proposed Boost.Process library starts tomorrow
by Marshall Clow 19 Feb '11

19 Feb '11

It's my pleasure to announce that the review of Boris Schäling's Process library starts tomorrow, February 7th and lasts until February 20, 2011, unless an extension occurs. What is it? =========== Boost.Process is a library to manage system processes. It can be used to: • create child processes • run shell commands • setup environment variables for child processes • setup standard streams for child processes (and other streams on POSIX platforms) • communicate with child processes through standard streams (synchronously or asynchronously) • wait for processes to exit (synchronously or asynchronously) • terminate processes Getting the library =================== The library is available at: http://www.highscore.de/boost/gsoc2010/process.zip with documentation at: http://www.highscore.de/boost/gsoc2010/ There was a quite involved "informal review" on the mailing list this past summer. That thread is archived here: http://thread.gmane.org/gmane.comp.lib.boost.devel/207594 Writing a review ================ If you feel this is an interesting library, then please submit your review to the developer list (preferably), or to the review manager (me!) Here are some 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? And finally, every review should answer this question: - Do you think the library should be accepted as a Boost library? Be sure to say this explicitly so that your other comments don't obscure your overall opinion. -- Marshall Review Manager for the proposed Boost.Process library

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[proto] Expressive C++ articles for offline reading
by Ravi 19 Feb '11

19 Feb '11

Hi, Is there a way to get the cpp-next articles on proto in a form readable offline? The best times for me to read them tend to be on buses and trains where I do not have access to the internet. There is too much (AJAX?) magic in the HTML sources for my poor browser to render the sources offline. Regards, Ravi

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[thread] Double Buffer Example
by Christian Henning 18 Feb '11

18 Feb '11

Hi there, I have some example code for boost::thread that illustrates a common multi-threaded design pattern. It's called Double Buffering which, I believe, is commonly used when a consumer is likely to be much slower processing items than a producer producing them. In this case a message queue is not really needed since a two element queue is as good as n element queue. Just imagine the case when a saving_to_database thread operates at 10MBit per second while a producer thread generates database rows at a 15MBit per second. For this example I decided to create a class binary_semaphore which simulates an event object that can either be set or unset. BTW, wouldn't a semaphore class be a nice addition to boost::thread? The code can be found here: http://pastebin.com/ASJp0t5h The code for the example is here: http://pastebin.com/VchGg8ci I think it would be great idea to add some simple pattern examples in the boost/libs/thread/example folder. Please let me know if there is a bug or potential race condition in the example. Regards, Christian

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[ICL] intersects(interval_set< int >, int) doesn't compile
by John Reid 18 Feb '11

18 Feb '11

AFAICT from the docs the following should compile: #include <boost/icl/interval_set.hpp> namespace icl = ::boost::icl; void interval_set_intersects() { icl::intersects( icl::interval_set< int >(), 1 ); } but I get a no match error: gcc.compile.c++ bin/gcc-4.4.3/debug/src/sandbox.o src/sandbox.cpp: In function ‘void interval_set_intersects()’: src/sandbox.cpp:7: error: No match for ‘intersects(boost::icl::interval_set<int, less, boost::icl::discrete_interval<int, less>, allocator> &, int)’ I'm using ICL in boost SVN revision 68965 John.

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installataion boost
by Faruk Kuşcan 18 Feb '11

18 Feb '11

hello, i need a quick answer. I downloaded boost_1_45_0.zip to my linux. I want to compile and build all the library. what should I do? can you explain step by step? thanks faruk

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Boost Asio and CYGWIN
by Jacques, Eduardo 18 Feb '11

18 Feb '11

Hi all, I am trying to build a simple application that uses boost::asio on netbeans using CYGWIN. But the compiler is giving me some link errors: Reading specs from /usr/lib/gcc/i686-pc-cygwin/3.4.4/specs Configured with: /managed/gcc-build/final-v3-bootstrap/gcc-3.4.4-999/configure --verbose --program-suffix=-3 --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --enable-languages=c,ada,c++,d,f77,pascal,java,objc --enable-nls --without-included-gettext --enable-version-specific-runtime-libs --without-x --enable-libgcj --disable-java-awt --with-system-zlib --enable-interpreter --disable-libgcj-debug --enable-threads=posix --enable-java-gc=boehm --disable-win32-registry --enable-sjlj-exceptions --enable-hash-synchronization --enable-libstdcxx-debug Thread model: posix gcc version 3.4.4 (cygming special, gdc 0.12, using dmd 0.125) /usr/lib/gcc/i686-pc-cygwin/3.4.4/cc1plus.exe -quiet -v -I../../../cygwin/usr/include/Common -I../../../cygwin/usr/include/Communication -MMD build/Debug/Cygwin-Windows/main.d -MF build/Debug/Cygwin-Windows/main.o.d -MP -MQ build/Debug/Cygwin-Windows/main.o -D__CYGWIN32__ -D__CYGWIN__ -Dunix -D__unix__ -D__unix -idirafter /usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../../include/w32api -idirafter /usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../../i686-pc-cygwin/lib/../../include/w32api -D __USE_W32_SOCKETS -D _WIN32_WINNT=0x0501 main.cpp -quiet -dumpbase main.cpp -mtune=pentiumpro -auxbase-strip build/Debug/Cygwin-Windows/main.o -g -version -o /cygdrive/c/DOCUME~1/jacqueed/LOCALS~1/Temp/cccKQ1O6.s ignoring nonexistent directory "/usr/local/include" ignoring nonexistent directory "/usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../../i686-pc-cygwin/include" ignoring duplicate directory "/usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../../i686-pc-cygwin/lib/../../include/w32api" #include "..." search starts here: #include <...> search starts here: ../../../cygwin/usr/include/Common ../../../cygwin/usr/include/Communication /usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++ /usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/i686-pc-cygwin /usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/backward /usr/lib/gcc/i686-pc-cygwin/3.4.4/include /usr/include /usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../../include/w32api End of search list. GNU C++ version 3.4.4 (cygming special, gdc 0.12, using dmd 0.125) (i686-pc-cygwin) compiled by GNU C version 3.4.4 (cygming special, gdc 0.12, using dmd 0.125). GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 /usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../../i686-pc-cygwin/bin/as.exe -o build/Debug/Cygwin-Windows/main.o /cygdrive/c/DOCUME~1/jacqueed/LOCALS~1/Temp/cccKQ1O6.s mkdir -p dist/Debug/Cygwin-Windows g++.exe -D __USE_W32_SOCKETS -D _WIN32_WINNT=0x0501 -v -o dist/Debug/Cygwin-Windows/quickfasttest build/Debug/Cygwin-Windows/main.o -L../../../cygwin/usr/lib -L../../Downloads/quickfast_win_src_1_2/Output/Release -lboost_thread-mt -lboost_filesystem-mt -lboost_serialization-mt -lboost_regex-mt -lboost_system-mt -lboost_filesystem-mt -lwsock32 -lwinmm -lws2_32 -lQuickFAST Reading specs from /usr/lib/gcc/i686-pc-cygwin/3.4.4/specs Configured with: /managed/gcc-build/final-v3-bootstrap/gcc-3.4.4-999/configure --verbose --program-suffix=-3 --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --enable-languages=c,ada,c++,d,f77,pascal,java,objc --enable-nls --without-included-gettext --enable-version-specific-runtime-libs --without-x --enable-libgcj --disable-java-awt --with-system-zlib --enable-interpreter --disable-libgcj-debug --enable-threads=posix --enable-java-gc=boehm --disable-win32-registry --enable-sjlj-exceptions --enable-hash-synchronization --enable-libstdcxx-debug Thread model: posix gcc version 3.4.4 (cygming special, gdc 0.12, using dmd 0.125) /usr/lib/gcc/i686-pc-cygwin/3.4.4/collect2.exe -Bdynamic --dll-search-prefix=cyg -o dist/Debug/Cygwin-Windows/quickfasttest.exe /usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../crt0.o -L../../../cygwin/usr/lib -L../../Downloads/quickfast_win_src_1_2/Output/Release -L/usr/lib/gcc/i686-pc-cygwin/3.4.4 -L/usr/lib/gcc/i686-pc-cygwin/3.4.4 -L/usr/lib/gcc/i686-pc-cygwin/3.4.4/../../.. build/Debug/Cygwin-Windows/main.o -lboost_thread-mt -lboost_filesystem-mt -lboost_serialization-mt -lboost_regex-mt -lboost_system-mt -lboost_filesystem-mt -lwsock32 -lwinmm -lws2_32 -lQuickFAST -lstdc++ -lgcc -lcygwin -luser32 -lkernel32 -ladvapi32 -lshell32 -lgcc build/Debug/Cygwin-Windows/main.o: In function `_ZStorSt13_Ios_FmtflagsS_': /usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/bits/ios_base.h:(.text$_ZN9QuickFAST13Communication14AsynchReceiverD2Ev[QuickFAST::Communication::AsynchReceiver::~AsynchReceiver()]+0x4a): undefined reference to `__imp___ZN9QuickFAST13Communication11AsioServiceD1Ev' /usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/bits/ios_base.h:(.text$_ZN9QuickFAST13Communication14AsynchReceiverC2ERN5boost4asio10io_serviceE[QuickFAST::Communication::AsynchReceiver::AsynchReceiver(boost::asio::io_service&)]+0x63): undefined reference to `__imp___ZN9QuickFAST13Communication11AsioServiceC1ERN5boost4asio10io_serviceE' /usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/bits/ios_base.h:(.text$_ZN9QuickFAST13Communication14AsynchReceiver4stopEv[QuickFAST::Communication::AsynchReceiver::stop()]+0x1d): undefined reference to `__imp___ZN9QuickFAST13Communication11AsioService11stopServiceEv' /usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/bits/ios_base.h:(.text$_ZN9QuickFAST13Communication14AsynchReceiverD0Ev[QuickFAST::Communication::AsynchReceiver::~AsynchReceiver()]+0x4a): undefined reference to `__imp___ZN9QuickFAST13Communication11AsioServiceD1Ev' /usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/bits/ios_base.h:(.text$_ZN9QuickFAST13Communication14AsynchReceiverD1Ev[QuickFAST::Communication::AsynchReceiver::~AsynchReceiver()]+0x4a): undefined reference to `__imp___ZN9QuickFAST13Communication11AsioServiceD1Ev' /usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/bits/ios_base.h:(.text$_ZN9QuickFAST13Communication14AsynchReceiver11joinThreadsEv[QuickFAST::Communication::AsynchReceiver::joinThreads()]+0x12): undefined reference to `__imp___ZN9QuickFAST13Communication11AsioService11joinThreadsEv' /usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/bits/ios_base.h:(.text$_ZN9QuickFAST13Communication14AsynchReceiver10runThreadsEjb[QuickFAST::Communication::AsynchReceiver::runThreads(unsigned Does anyone have an idea about what is going on? Eduardo Jacques BTG Pactual - IT Front Office BM&F Praia de Botafogo, 501/5º andar, Botafogo 22250-040 Rio de Janeiro, RJ, Brasil Telefone +55-21 3262 9617 Fax +55-21 3262 8600 eduardo.jacques(a)btgpactual.com www.btgpactual.com ********************************************************************** Visit our website at http://www.btgpactual.com The content of this message is confidential and was intended solely to its recipient. In case this message is received by mistake, please destroy it and notify the sender immediately. Electronic mails are not a safe channel for data transmission and the sender accepts NO liability for eventual errors, delays, loss, interception or virus infection. When necessary, the receiver must request a hard-copy version. O conteúdo desta mensagem é confidencial e destinado exclusivamente aos destinatários. Caso a receba por engano, favor destruí-la e notificar o remetente de imediato. 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[boost::pool] Re: Offering a possible replacement for boost::pool
by Lang Stefan 18 Feb '11

18 Feb '11

Thanks Joel, I would gladly chime in and share my insights. Where should I go to contribute? Stefan ------------------------------ Message: 3 Date: Thu, 17 Feb 2011 19:17:08 +0100 From: Joel Falcou <joel.falcou(a)lri.fr> To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] Offering a possible replacement for boost::Pool Message-ID: <4D5D6624.7030202(a)lri.fr> Content-Type: text/plain; charset=ISO-8859-1; format=flowed THere is currently an effort aroudn boost.pool to amend it to a more usable & maintained state. Care to participate ? ------------------------------

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Building 64-bit with Visual Studio 2010
by Greg Hickman 18 Feb '11

18 Feb '11

I can start a 32-bit VS command line and build boost_1_45_0, but the 64-bit command line build fails and I can't tell why. I'm running VS 2010 Ultimate on Windows 7 Professional, and here's the boost-build invocation I'm using: \.bjam -j 4 *^* More? *--build-dir=*"c:\temp" *^* More? *--build-type=complete* *msvc-10.0* architecture=x86 address-model=64 stage64 ...but I can't tell what is going wrong looking at the output. Can anyone suggest how to ascertain the problem? Perhaps a particular switch to see wha'ts failing? Thanks, Greg

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detecting the compiling platform
by Sean Farrow 18 Feb '11

18 Feb '11

Hi: I'm currently involved in a project which needs to detect the platform (windows/mac currently) on which is it being compiled. Does boost.Configuration have anything to allow this to be done? Cheers Sean.

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[boost.filesystem] notifications when a directory contents changes
by Sean Farrow 18 Feb '11

18 Feb '11

Hi: I know on windows there is a way to determine when the contents of a directory changes and for what reason the change has occurred, file created/deleted etc. Is there an equivalent in the boost.filesystem library? Cheers Sean.

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