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Re: [Boost-users] [bjam]BorlandC++BuilderX problem staging Boost
by Jerry Schreiber 14 Dec '06

14 Dec '06

Rene Rivera wrote: >Use: > bjam -sTOOLS=borland stage >Or possibly: > bjam -sTOOLS=borland-5_6_4 stage >Or perhaps you just made a mistake in typing in "Borland" instead of >"borland" above? I tried "borland", worked the same as "Borland" which I used before, but "borland-5_6_4" made a substantial difference. Rene Rivera wrote: >You need to add that directory to your library search path when linking >your own programs. I've added the C:\Boost\boost_1_33_1\libs to the "-L" library search path (only had the parent directory previously). But I still get: Fatal: Unable to open file 'LIBBOOST_FILESYSTEM-BCB-S-1_33_1.LIB' In examining the output from the bjam using borland-5_6_4, I now see references to "HardLink stage\lib\libboost_filesystem-bcb56-s.lib", but no references to "libboost_filesystem-bcb-s-1_1_33_1.lib". I also see several "...skipped <@boost!lib>boost_filesystem-bcb56.lib for lack of <@boost!lib>boost_filesystem-bcb56-1_33_1.lib..." I'll attach all of the bjam output which I was able to trap. Jerry Schreiber

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Boost: issue with Threads and Mutexes
by Séverin Lemaignan 14 Dec '06

14 Dec '06

Hello, I'm Severin Lemaignan, software engineer at the INRIA french public research center. We are working on automation in public transportation. All our project is currently a pretty big C++/CLI-based piece of software, and we are relying more and more on Boost for low-level operations like threading. We ran very recently into a problem with Boost mutexes: We compile the project with Visual Studio 2005 (with the /clr flag), and everything was fine until we (re-)enabled precompiled headers. After that, the program still compiled and linked but it crashed as soon as started with a 0xc000007b error (namely "The application failed to initialize properly"). After futher investigation, we discovered it's due to the way we use "#pragma unmanaged" and "#pragma managed". The Boost headers were simply included in a "managed" part of the code while Boost methods (especially mutexes) were called in a "unmanaged" part. Hence causing the crash. The Boost library never complained at compile time. Maybe it should detect inconsistent use of managed/unmanaged pragma and warn the user ? We found another pratical (but unexpected) solution to the issue: instanciate a Boost::thread before the mutex. It solved the run-time crash. If someone has an explaination... Best regards, Séverin Lemaignan

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in-depth iterator
by Guillaume Chereau 14 Dec '06

14 Dec '06

Hello everyone, I have a question concerning the boost::iterator library. Here is my situation : I have a Tree structure that looks like that : template<class T> struct Node : public std::vector<Node<T> > { T value; }; I'd like to create an iterator that would yield all the values of such a structure. And also being able to prevent the iterator from going into some branches. The interface should look like this : template<class T> struct Policy { bool go_inside(const Node& node) { return True; }; }; Node<int> my_tree; ... depth_iter<int, Policy> iter(my_tree, Policy()); for (; depth_iter++; depth_iter != my_tree.end()) { .... } I can't find an easy way to create this "depht_iter" class. Doesn't the boost::iterator library gives some way to create in-depth iterators ? Is there a way to use the boost::graph library ? Thanks in advance Guillaume

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updating mpl::map to 1.34
by Ovanes Markarian 14 Dec '06

14 Dec '06

Hi! I would like to update mpl::map and mpl algorithms to 1.34 release candidate libs. What is the best way to do it? If there an archive of currently tested boost libs available or which CVS label should I use for new mpl version. Is it sufficient to replace boost/mpl directory in the installed boost libs? Currently I have problems when iterating (mpl::for_each, mpl::max_element) through mpl::map sequences. With Kind Regards, Ovanes Markarian

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threads / scoped_lock
by Goroll, Torsten 14 Dec '06

14 Dec '06

Hi, as I understand the scoped_lock, it locks every ressource in a code block. What if I dont want to lock a ressource all the time the method is running? Do I have to create a new method? Example: boost::mutex a_mutex; ... { boost::mutex::scoped_lock lock(a_mutex); cou<<"bla"; //much of code where cout dont has to be locked ... } Torsten -----Ursprüngliche Nachricht----- Von: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org]Im Auftrag von boost-users-request(a)lists.boost.org Gesendet: Donnerstag, 14. Dezember 2006 14:55 An: boost-users(a)lists.boost.org Betreff: Boost-users Digest, Vol 1117, Issue 1 Send Boost-users mailing list submissions to boost-users(a)lists.boost.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.boost.org/mailman/listinfo.cgi/boost-users or, via email, send a message with subject or body 'help' to boost-users-request(a)lists.boost.org You can reach the person managing the list at boost-users-owner(a)lists.boost.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Boost-users digest..."

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Re: [Boost-users] [bjam]BorlandC++BuilderX problem staging Boost
by Jerry Schreiber 14 Dec '06

14 Dec '06

I have experimented further with bjam input syntax, trying to follow the examples in http://www.boost.org/tools/build/v1/build_system.htm. Since I am currently interested in the filesystem library only, I added "--with-filesystem". This reduced the amount of output so that the CMD window's capacity was not exceeded. I discovered that the first thing going wrong was: borland-C++-action bin\boost\libs\filesystem\build\boost_filesystem.dll\borland- 5_6_4\debug\exception.obj C:\Boost\boost_1_33_1\libs\filesystem\build\../src/exception.cpp: Fatal F1003 C:\Boost\boost_1_33_1\boost/filesystem/config.hpp 23: Error directive: Dynamic linking Boost.Filesystem does not work for Borland; use static linking instead *** 1 errors in Compile *** I have tried variations on -sBUILD=runtime-link-static and -sBUILD=<runtime-link>static, but to no avail; I keep getting the message that the borland-C++-action is requesting Dynamic linking, which does not work with Borland. What is the precise syntax to get only static linking from bjam? Jerry Schreiber

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building 64-bit Windows using MVC 8.0
by Rusty Jones 14 Dec '06

14 Dec '06

Hi, I have found some information on building 64-bit versions of boost along with people's experience, but I don't seem to have a clear understanding of the state of 64-bit support. 1. How do you build boost 1.33.1 to build as a 64-bit version in MVC 8.0? Can you use bjam or do you have to do something else? 2. Will version 1.34 support 64-bit windows? The regression tests for RC_1_34_0 used to have columns for 64-bit windows but I don't see them there anymore ( http://engineering.meta-comm.com/boost-regression/CVS-RC_1_34_0/developer/s… ). Any information would be appreciated. I need to make our software 64-bit compatible and getting 64-bit compatible boost is essential to do this. Cheers, Rusty

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mapped_file_source
by Victor Morales-Duarte 14 Dec '06

14 Dec '06

Hi all, I'm trying to use boost::iostream::mapped_file_source directly, but I can't close and then re-open the file without getting an exception. Here is an example. ********************************************************************************************** #include <boost/iostreams/device/mapped_file.hpp> int main( void ) { std::string fileName( "SomeFile.ext" ); int osAlignment = boost::iostreams::mapped_file_source::alignment(); boost::iostreams::mapped_file_source fileMap( fileName, 2 * osAlignment, 0 ); // Load data to application memory using fileMap.data(); fileMap.close(); // The following line throws because fileMap.is_open() returns true fileMap.open( fileName, 1024 * osAlignment, 1024 * osAlignment ); // Load more data to application memory using fileMap.data(); return 0; } ***************************************************************************************** What I truly don't understand is why a call to is_open() woud return true immediately after a call to close(). What do I need to do to be able to map different parts of the same file? I can't map the whole file because the number of files that I need to process is large enough that I'd run out of allocation space for my process. Thanks guys. Victor I'm using boost 1.33.1 with Visual Studio 2003 on WinXP SP2. --------------------------------- Cheap Talk? Check out Yahoo! Messenger's low PC-to-Phone call rates.

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Re: [Boost-users] threads / scoped_lock
by Goroll, Torsten 14 Dec '06

14 Dec '06

But why so simple if I could do it intricately too? ;o) Thank you -----Ursprüngliche Nachricht----- Von: Ovanes Markarian [mailto:om_boost@keywallet.com] Gesendet: Donnerstag, 14. Dezember 2006 15:20 An: boost-users(a)lists.boost.org Betreff: Re: [Boost-users] threads / scoped_lock Hi! you could define a scope where to lock ;) Just like this: boost::mutex a_mutex; ... { { boost::mutex::scoped_lock lock(a_mutex); //lock cout<<"bla"; }//end of scope => unlock //much of code where cout dont has to be locked ... } With Kind Regards, Ovanes Markarian On Thu, December 14, 2006 15:12, Goroll, Torsten wrote: > Hi, > > as I understand the scoped_lock, it locks every ressource in a code block. What if I dont want to > lock a ressource all the time the method is running? Do I have to create a new method? > > Example: > > boost::mutex a_mutex; > ... > { > boost::mutex::scoped_lock lock(a_mutex); > cou<<"bla"; > > //much of code where cout dont has to be locked > ... > } > > Torsten > > -----Ursprüngliche Nachricht----- > Von: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org]Im Auftrag von > boost-users-request(a)lists.boost.org > Gesendet: Donnerstag, 14. Dezember 2006 14:55 > An: boost-users(a)lists.boost.org > Betreff: Boost-users Digest, Vol 1117, Issue 1 > > > Send Boost-users mailing list submissions to > boost-users(a)lists.boost.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.boost.org/mailman/listinfo.cgi/boost-users > or, via email, send a message with subject or body 'help' to > boost-users-request(a)lists.boost.org > > You can reach the person managing the list at > boost-users-owner(a)lists.boost.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Boost-users digest..." > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

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BOOST_ASSERT and others
by abir basak 14 Dec '06

14 Dec '06

Hi, Hi, if any assert is there like BOOST_ASSERT or assert where I can pass a custom message to print on assert failure ? i.e. something like BOOST_ASSERT(condition, message) Also, is there any debug print version for boost? Something like, I want a message should be printed only when the application is running in DEBUG version (whatever flag the system provides for that). The message can be cout or printf kind of thing. A little safety is better sometimes like debug print can't change the value of the variable etc. Thanks -- Abir Basak, Member IEEE Software Engineer, Read Ink Technologies B. Tech, IIT Kharagpur email: abir(a)abirbasak.com homepage: www.abirbasak.com

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