- Boost-users - lists.boost.org

[logging]Logging from an exe and dll's
by Vladimir Kiryazev 30 Sep '08

30 Sep '08

Hi, I am still using the logging library by John Torjo. My program consist of an exe and several dll's. I need to log from within each of these. How does one do this? TIA.

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bjam?
by Peter H. Hodges 29 Sep '08

29 Sep '08

I will be using an Intel C++ compiler. What version of bjam should I download? Peter Hodges TBU 309-494-3457

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regex vc8-stlport.mak missing in 1.33?
by Rob Maidment 29 Sep '08

29 Sep '08

I'm upgrading from 1_33_1 to 1_36_0 (windows) and I've noticed that vc8-stlport.mak is missing from the libs\regex\build folder. Is this intentional? If so, how do I go about building for VC8 and stlport? My previous build script ran bjam with the option "-sTOOLS=vc-8_0-stlport". This now results in the warning: "no toolsets are configured". Does this relate to the above missing file? Thanks, Rob CUSTOMER TESTIMONIAL OF THE WEEK ---------------------------------------------------------------- Tomaž Gorjup, CIO, Studio Moderna d.o.o., Ljubljana, Slovenien: “We had been looking for an anti-spam solution that would effectively protect us from flooding spam, globally and selectively using various criteria. MIMEsweeper fulfilled all our expectations with additional security layer and effective email traffic analysis.” ---------------------------------------------------------------- Do your defenses have what it takes? Prove it. ... try the Clearswift Threat Test today! – www.clearswift.com/threattest Clearswift monitors, controls and protects all its messaging traffic in compliance with its corporate email policy using Clearswift products. Find out more about Clearswift, its solutions and services at http://www.clearswift.com This communication is confidential and may contain privileged information intended solely for the named addressee(s). It may not be used or disclosed except for the purpose for which it has been sent. If you are not the intended recipient, you must not copy, distribute or take any action in reliance on it. Unless expressly stated, opinions in this message are those of the individual sender and not of Clearswift. If you have received this communication in error, please notify Clearswift by emailing support(a)clearswift.com quoting the sender and delete the message and any attached documents. Clearswift accepts no liability or responsibility for any onward transmission or use of emails and attachments having left the Clearswift domain. This footnote confirms that this email message has been swept by MIMEsweeper for Content Security threats, including computer viruses.

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[Thread][win32, msvc] Mutexes
by Alexander Gutenev 29 Sep '08

29 Sep '08

Hi I consider changing from win32 CRITICAL_SECTIONs to Boost.Thread mutexes. boost::mutex isn't CRITICAL_SECTION, but boost::detail::lightweight_mutex is. Does this mean that boost::mutex is heavy-weight ? If so, what's the reason for heavy-weight implementation which has the same capabilities that lightweight CRITICAL_SECTION has ? If not so, what's the reason for boost::detail::lightweight_mutex to exist ? Thanks.

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Boost Serlialization on XScale problem
by lee nookx 29 Sep '08

29 Sep '08

Hi, I am having a strange problem with the Boost Serilalizartion library on an XScale platform. I am using v1.34.1 of the libraries and I'm seeing segfaults when creating an archive object, but only under some circumstances. The problem occurs in several different projects, but I've been able to reproduce it using the most simple case from the tutorial (http://www.boost.org/doc/libs/1_36_0/libs/serialization/doc/index.html) The problem that I see is that the code segfaults at these lines, and a core dump shows this error is occuring down on malloc_trim(): std::ifstream ifs("filename"); boost::archive::text_iarchive ia(ifs); // <--- causes a segfault. However, if I move the "std::ifstream ifs("filename");" further up the code (next to the initialisation of the ofs object, then the code works fine. Has anyone else seen any problems like this before? We have been using Boost::Thread, and Boost::Date-Time without any problems for a while, so I believe that this may just be a serialization library problem. I am also going to give v1.36.0 a try to see if it's something subtle that's been fixed already. (I have a core dump that I can make available if anyone needs it....) --lee --

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serialization: confusing exceptions
by Ivan Godard 29 Sep '08

29 Sep '08

The exception "unregistered_cast" carries the message "unregistered void cast" when thrown, which is nowhere documented and requires reading the source to discover the relationship. The doc lists the internal names of the exceptions, whereas the user sees the associated messages. Either the doc should instead (also?) list the actual messages, or the internal and external names should be the same.

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[Statechart] Passing Arguments in the Events Concept
by Babi Seal 29 Sep '08

29 Sep '08

Hi, I have been researching the Boost archives, Tutorials, examples and I do find references to the fact that it is possible to provide arguments along with Events that a custom_reaction (in self-transition) can selectively "react" on based on the value of the argument but I am unable to articulate it using the Boost Statechart library. As reference I took the BitMachine/Performance library where the Events seemed to take a class BitNo as a parameter but I could not adapt it for my application. I am trying to control a box which has many interfaces. Each interface has an InterfaceID . I have statemachines for Box and Interface. When an interface is removed, the statemachine of the interface sends first an InterfaceDeleteTrigger event to get the Box in the InterfaceDelete_Pending state Then the Interface would like to send the actual interface Event InterfaceDelete with the Id to the Box so that the box can trigger the appropriate actions to remove the Interface. (PS - I am using two events because I read that it is not good design to try to extract triggering events and event arguments for state entry. So I tried to enter the state with a trigger event and used another instate event with actual interface id to find the actual interface). I tried something like this for the Box StateMachine : template <class InterfaceID> struct EvInterfaceDelete : sc::event< EvInterfaceDelete < InterfaceID > > {}; : : struct InterfaceDelete_Pending : sc::state < InterfaceDelete_Pending, BoxStateMachine> { typedef mpl::list< sc::custom_reaction < EvInterfaceDelete < InterfaceID> >> reactions; sc::result reaction (const EvInterfaceDelete <InterfaceID> &) { //// Sorry for my ignorance - but how I access the class InterfaceID internals so I can do something like : Box pBox = outermost_context().box; uint64_t id = InterfaceID.GetID(); pBox->DeleteInterface(id); } Thanks and I greatly appreciate if someone could point me to some examples of code where the events are passed with arguments and the values of the arguments are examined for processing. Thanks again

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Serialize dynamic_bitset?
by Simon Fraser 29 Sep '08

29 Sep '08

Does anyone have any code available to serialize dynamic_bitset? I'm guessing it would be most efficient to use from_block_range/ to_block_range and serialize the blocks one by one, or would it be reasonable to use to_string and the string constructor? I worry that care needs to be taken to avoid endianness issues. Thanks Simon

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Re: [Boost-users] [Thread] Not able to compile a program with Thread library on ARM
by Rudi Dittrich 28 Sep '08

28 Sep '08

> > Dear all, > > > > I've got the following problem: I want to use the boost threading > library provided in version 1.36 on an arm (imx31) based evaluation board with > MontaVista linux and g++ version 4.2.0 on it. > > When I try to compile the following example with my arm-g++ compiler > > > > I ran into this same problem on ARM. Sounds like you've found the > fix, but FYI: I just made Boost short-circuit the tests for > GCC-specific atomic code on ARM, and use the generic pthreads versions > instead. See the attached patch. > Hi Matthew, I compiled boost thread with your patch but I got lots of compilation errors. Maybe I haven't set-up my boost environment correctly. So could you please give me some further details / advices on your compilation setting (flags, etc.) and how I have to compile the thread library. I've added a patch which includes two specialized implementations of 'atomic_count' and 'sp_counted_base' for ARMv6 and higher which are used by shared_ptr. In my mind, this could be an optimal implementation for these architectures as I used LDREX and STREX instructions within each atomic operation. This means, that I load (using LDREX) a particular value from memory, operate on it, e.g.: increment the value, and write it back to the memory with STREX. During this computation the system assumes that no one else writes to this address. This is a very optimistic approach and does not block the external bus of the processor. Thus, others could continue with their computations which could possibly lead to a performance gain. STREX indicates whether someone has changed the value of this address during our atomic operation. If so, we have to jump back to the beginning of the operation and start the operation again. Note: I tried to implement the __sync_add...() functions which are used in the ...sync.hpp files. For a detailed description of these functions, please refer to http://www.mcs.vuw.ac.nz/cgi-bin/info2www?(gcc)Atomic+Builtins Best regards, Rudi Dittrich > -- > Matthew L. Creech >

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Re: [Boost-users] Help istalling Boost python binding
by Danilo Tomasoni 28 Sep '08

28 Sep '08

2008/9/28 David Abrahams <dave(a)boostpro.com> > on Sun Sep 28 2008, "Danilo Tomasoni" <tomasoni-AT-fbk.eu> wrote: > > > 2008/9/26 David Abrahams <dave(a)boostpro.com> > > > > on Fri Sep 26 2008, "Danilo Tomasoni" <tomasoni-AT-fbk.eu> wrote: > > > > > Dear all. > > > I have some problems installing this fantastic libraries.. > > > I have downloaded the svn version (revision 338) and the 0.9 > relased version, > > > but either haven't a setup.py file that work. > > > In bindist/ folder, there is a setup.py file, that try to install > all files in > > > bin/* > > > directory.. > > > but this folder does not exists! in bindist folder exists only > setup.py file. > > > > > > So.. how can I install python bindings for boost on my fedora 9 > machine?? > > > Thank you for advice! > > > > Please work your way through > > http://www.boost.org/doc/libs/1_36_0/more/getting_started/index.html; > it > > should help. Please also note that Boost doesn't include Python > > bindings for every library in the collection. > > > > Many thanks David for your advice! > > I have tried to follow your advice but I have encountered a little > problem, > > and I can't find the solution on documentation. > > > > When I tried to install bgl-python-0.9 (boost.graph bindigs) > > I retrieved this error: > > > > [root@ciropom bgl-python-0.9]bjam > --build-dir=/home/ciropom/Scaricati/bgl-python-0.9 > > / --toolset=gcc --build-type=complete stage > > Unable to load Boost.Build: could not find "boost-build.jam" > > --------------------------------------------------------------- > > Attempted search from /home/ciropom/Scaricati/bgl-python-0.9 up to the > root > > and in these directories from BOOST_BUILD_PATH and BOOST_ROOT: > /usr/share/ > > boost-build. > > > > So how can I load correctly Boost.Build? > > > > The documentation speak only about a "IO streams library error", and in > this case it > > isn't the problem. > > > > The documentation recommend to ask in mailing list.. > > I hope that you can help me... > > > > Many thanks for the time you spent for me! > > Well, I'm only guessing here :( > because AFAIK bgl-python isn't actually > part of Boost at all... Really? ...and.. what is AFAIK? Can you explain yourself? but if you place your bgl-python-0.9 folder > somewhere inside your Boost directory tree and then try to build from > there, you *should* have better luck. > I'll try... many thanks for your help. Tomasoni Danilo -- http://ciropom.homelinux.net L'apprendere molte cose, non insegna l'intelligenza. -- Eraclito

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