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regex memory leaks
by jamich - Post 08 Nov '11

08 Nov '11

I have problem with memory leaks. I use boost version 1.47. I compiled boost libray by Visual Studio 2010 SP1. My testing code is here: #include "stdafx.h" #include <stdio.h> #include <boost/regex.hpp> void Memtest() { boost::regex e("^(\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3})(:\\d{1,5})?$"); if ( boost::regex_match("1.a.1.1", e) ) std::cout << "ok" << std::endl; if ( boost::regex_match("1.1.1.1", e) ) std::cout << "ok" << std::endl; } int main(int argc, _TCHAR* argv[]) { _CrtSetReportMode( _CRT_ERROR, _CRTDBG_MODE_DEBUG ); _CrtMemState state; _CrtMemCheckpoint(&state); Memtest(); _CrtMemState newState, diff; _CrtMemCheckpoint(&newState); if(_CrtMemDifference(&diff, &state, &newState)) { _CrtMemDumpStatistics(&diff); } return 0; } This code comes from simple console based project. Debugger gives me these output: 0 bytes in 0 Free Blocks. 5544 bytes in 16 Normal Blocks. 0 bytes in 0 CRT Blocks. 0 bytes in 0 Ignore Blocks. 0 bytes in 0 Client Blocks. Largest number used: 9333 bytes. Total allocations: 13620 bytes. Could anyone help me to resolve these memory leaks? Thanks, Michal

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Re: [Boost-users] [locale] Quick questions.
by Jookia 08 Nov '11

08 Nov '11

>> Use std::locale::global(locale_you_need_to_install) That's what I've originally been doing (You can see the code at http://sprunge.us/ULEV ), but it doesn't work. Also, I'm new to mailing lists. How do I specifically reply to a post properly? Currently I'm just typing "Re: [Boost-users] [locale] Quick questions." in the subject bar.

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[locale] Quick questions
by Jookia 07 Nov '11

07 Nov '11

Hey! I have some small questions about Boost.Locale. 1. Is it safe to assume that Boost.Locale API methods (like gettext) return UTF-8 strings, or are they locale dependent? 2. I use a custom domain, but when calling gettext("...") I still get lovely English text. However, calling gettext("...", std::locale()) fixes that. Is there some way to set the default domain/locale for gettext so I can simply write gettext("...")? 3. What's the deal with the whole locale/$LANG/LC_MESSAGES/$domain.mo folder structure? I know it has Unix heritage, but why is it explicity forced? It seems like a complex structure compared to locale/$LANG-$domain.mo.

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multi-array and pdes
by petros 07 Nov '11

07 Nov '11

Hi, These can very well be very naive questions, since I am relatively new to this - apologies..: I am trying to write a pde solver for a 3D problem. Multi-array seems like a very natural choice for a data structure to store the functtion values. The method I am trying to use is operrator splitting. This amounts to solving a tridiagonal system for each dimension in sequence. Suppose then that I have a MA( M, N, L ): It is highly desirable to maintain this xyz (let's call it) "logical" system of reference since incorporation of boundary conditions and stencil calculations would be conceptually straightforward -otherwise very complicated. The idea being that, I would then have the tridiagonal opertator ( and rhs) in the "rotated" system and all other calculations in the "logical" one. Therefore, I need some fascility to rotate my MA, from the xyz to yzx etc (cyclically). Is there functionality ( as a view to the data ) that would allow me to do this off-the-shelve? Also, a couple of other points: -If I wanted to use views to subgrids, in parallelized calculations, are there memory allocations that happen under the hood for which I should worry (for performance)? -Is a one dimensional MA usable? -Are there adapters between 2D MAs and uBlas matrices? Thank you very much for your help in advance! P-

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[atomic] review results
by Tim Blechmann 07 Nov '11

07 Nov '11

hi all, unfortunately only few reviews of boost.atomic arrived in time, however i count 3 YES and no NO, so i am happy to say: Helge Bahmann's boost.atomic library is ACCEPTED. since the library is an implementation of a c++11 feature for c++03, design, API and semantics are mostly fixed. many comments are going into details of the implementation, so i won't sum them all up ... iac, helge already said he wants to address the raised issues, the main points are summarized below. full implementation of the c++11 interface: the library currently only implements a subset of the c++11 library. it lacks the functional interface for integral atomic types and the ATOMIC_VAR_INIT / ATOMIC_FLAG_INIT macro. quickly consulting the latest draft that i currently have at hand the following two functions are missing as well: template <class T> T kill_dependency(T y); void atomic_signal_fence(memory_order); i encourage helge to provide a full implementation of the interface. documentation: the documentation is currently lacking a good API reference. i would therefore encourage helge to provide a doxygen-generated reference section. there were some concerns that it assumes that readers will have to be familiar with concurrency. maybe it is a good idea to point to some literature/tutorials about concurrent programming and/or to c++11 atomics. the section of real-world examples could probably include a link to shavit/herlihy's book `the art of multiprocessor programming'. it would also be helpful to have a detailed specification, if a platform/compiler combination supports a specific type natively (with run-time dispatching or specific compiler flags) ... maybe in form of a table. shared memory support/multi-module support: in multi-module applications and when using shared memory, the blocking emulation of atomics can cause troubles. for multi-module applications this can be resolved by placing the spinlock pool inside a shared library. shared- memory support could be realized by associating a (spin)lock with each blocking atomic<> instead of using a pool of spinlocks. boost should definitely provide atomics which support shared memory, either by default or by an additional implementation which is placed in the boost::interprocess namespace. i would like to thank helge for implementing boost.atomic and submitting it to boost and everyone who participated in the review. cheers, tim review manager

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[Boost.PropertyTree] Is it possible to populate a tree with user defined parser?
by Gábor Márton 07 Nov '11

07 Nov '11

Hi, I would like to use PropertyTree as a higher level interface to access our project's config data. However, the config data can be accessed only through C API calls, so I cannot use the XML or INI parser. I suppose that PropertyTree has a polimorfic implementataion, which provides an interface for which a parser must conform, am I right? Thanks, Gabor

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bcp doesn't work as expected
by Max Limper 06 Nov '11

06 Nov '11

Hi everyone, I'm trying to use boosts shared_ptr class, and only that one - I was happy to see that boosts provides such a cool tool as bcp. However, it seems that the installation that bcp performs is not complete in my case. When compiling my project, I first found out that "boost/config/user.hpp" was missing. So I copied that one manually and assumed that it was just a little bug since that one does just includes comments and might therefore have been ignored by bcp for some reason. But now, I still find that "boost/config/compiler/visualc.hpp" is missing and my project is unable to compile. According to the bcp description ( http://www.boost.org/doc/libs/1_37_0/tools/bcp/bcp.html) I was assuming that bcp should install all compiler configs that might be necessary for any random platform. Here's how I used bcp after I built it (Windows7, VC10): "{path-to-the-bcp-build-dir}/bsp.exe shared_ptr.hpp E:\SDK\boost_1_47_0_dependencies" , invoked from the root of the freshly downloaded boost directory E:\SDK\boost_1_47_0. Did I make a mistake, or is this a bug? Thanks a lot in advance! Regards, Max

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[variant] is the which() function part of variant's public API?
by Nathan Ridge 06 Nov '11

06 Nov '11

which() is a public member function of variant, but I don't see any mention of it in the documentation. Can I assume this is part of the public API (i.e. it won't go away, won't change its behaviour in future releases) or not? (For example, I am writing a function to serialize a variant and thinking that one implementation might be to write the which() followed by the object). Thanks, Nate

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boost::filesystem::path in UTF-8 on Windows
by John M. Dlugosz 05 Nov '11

05 Nov '11

If I have a string that is in UTF-8, how do I tell the path constructor? path p1 ("my utf8 data", SOME_CODECVT); I think it is a matter of passing the right SOME_CODECVT. What is it? The |path::value_type| is |wchar_t, according to the docs. —John |

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Re: [Boost-users] [Gil] TIFF file with mixed 8/16 bit channel
by Corinna Kinchin 05 Nov '11

05 Nov '11

Christian, You're wonderful - thanks for getting back so promptly and helpfully. I'm just downloading the latest boost version (am using 1.42 at the moment which doesn't seem to have the cymk16161688_image_t you refer to) and will try out your suggestion. And this is almost certainly an RTFM question but how does one know which input image type to use? If you had a moment to point me in the right direction or to jot down an elegant code snippet to get me on the right track for reading different flavours of TIFF files I'd be eternally grateful ... Meanwhile I'll go RTFM ;) Thanks a million for taking the time to help. All the best, ... Corinna > > Corinna, this has to wait until tomorrow. Hope that's ok with you. > > But I can see from the source code that the input image should be > cymk16161688_image_t and not just cymk8_image_t.

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