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Writing a dynamic string into a shared memory using Boost Library
by Hany Assasa 09 Jun '14

09 Jun '14

I want to share a dynamic array of characters between two processes using Boost Shared Memory. I use the following two pieces of code to do that: *Producer Process:* char *data;unsigned int share_length;unsigned int offset; std::string data_to_share(data + offset, data + offset + share_length); boost::interprocess::managed_shared_memory managed_shm(boost::interprocess::create_only, "SomeName", 1024*1024);typedef boost::interprocess::allocator<char, boost::interprocess::managed_shared_memory::segment_manager> CharAllocator;typedef boost::interprocess::basic_string<char, std::char_traits<char>, CharAllocator> my_string; managed_shm.construct<my_string>("DataToShare")(data_to_share.c_str(), managed_shm.get_segment_manager()); *Consumer Process:* boost::interprocess::managed_shared_memory managed_shm(boost::interprocess::open_read_only, "SomeName");typedef boost::interprocess::allocator<char, boost::interprocess::managed_shared_memory::segment_manager> CharAllocator;typedef boost::interprocess::basic_string<char, std::char_traits<char>, CharAllocator> my_string; std::pair<my_string *, size_t > data = managed_shm.find<my_string>("DataToShare"); cout << "Data Size=" << data.first->length() << endl; The problem is when I try to print the length of the DataToShare in the Consumer Process it is wrong, so what is the problem in my code, is it in the Producer Part since I am doing data_to_share.c_str()which is a std::string type instead of of my_string type? *Possible Answer:* I believe the answer to my question is, converting std::string into my_string type. so can anyone tell me how to do that?

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[mpl] Cannot open include file
by Christian Henning 09 Jun '14

09 Jun '14

I have the following error when using Visual Studio 2013 on the boost master branch: 1>c:\boost\boost\mpl\vector\aux_\include_preprocessed.hpp(49): fatal error C1083: Cannot open include file: 'boost/mpl/vector/aux_/preprocessed/plain/vector10.hpp': No such file or directory I have run "b2 headers". Here is the code I'm trying to compile: // cpp_test.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include <boost/mpl/vector_c.hpp> int _tmain(int argc, _TCHAR* argv[]) { return 0; } Manually I can find vector10.hpp in C:\boost\boost\mpl\vector but I don't have the folder c:/boost/mpl/vector/aux_/preprocessed/plain/ Any ideas? Thanks, Christian Regards, Christian

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Using a vertex type
by Mads Jensen 09 Jun '14

09 Jun '14

Hi, I'm planning on writing an implementation of the Gomory Hu cut tree algorithm (for learning purposes, and as a side bonus, have some code in open source), but have some initial difficulties. I posted some code at: http://codepad.org/yTt3xNsK I had tried something like: template<class OrdinaryVertex> struct gomory_hu_vertex { std::vector<OrdinaryVertex> vertices; }; and the graph definition: typedef adjacency_list<listS, vecS, undirectedS, GHVertex> GHGraph; but with the insert operation, I get a compiler error. When I get it working, I want to submit it to the boost library. Are there restrictions on what type of features you can use, e.g., anything from C++11 is ruled out? Thank you, Mads

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[serialization] serialize object tree and values
by Daniel Krikun 07 Jun '14

07 Jun '14

Hello, I have an application which creates some objects connected between them using boost::shared_ptr and then executes a main loop. The object graph structure is almost constant over time but primitive member fields of the objects change over time. I would like to serialize the whole object graph *each cycle* saving both the object graph structure and primitive member fields. Currently I don't know how to achieve this: when I try to serialize via pointer only first value is saved. Also, I'm not sure if I should turn object tracking off, because indeed it should be a single instance of each, it just should be modified over time. Thanks!

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Re: [Boost-users] Boost-users Digest, Vol 3819, Issue 2
by David Frank 06 Jun '14

06 Jun '14

Thanks Nat. I'm wondering if there is a powerpc built binary including context to download? On Thursday, June 5, 2014 8:25 AM, "boost-users-request(a)lists.boost.org" <boost-users-request(a)lists.boost.org> wrote: 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..." Today's Topics: 1. Re: [Python]compiling python library (Mikl?s T?th) 2. Re: is boost context supported on powerpc?- (Nat Goodspeed) 3. Re: Fwd: Lexical cast between narrow and wide strings (Nat Goodspeed) 4. Re: [Python]compiling python library (Erik H) ---------------------------------------------------------------------- Message: 1 Date: Thu, 5 Jun 2014 13:18:44 +0200 From: Mikl?s T?th <spiralfuzet(a)gmail.com> To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] [Python]compiling python library Message-ID: <CAHsDByksou9LpheA6g-Napu6GPKjbAdtYFZeC2psuRhRCUDivQ(a)mail.gmail.com> Content-Type: text/plain; charset="utf-8" Hi Erik, Unfortunatly Visual Studio is not an option for me. I didn't find this page but as I understand it helps to install python libs (extensions) with mingw. What I try to do is build python from src to get an appropriate static library. I can link it with my Qt toolchain (Mingw 4.6.3) and it compiles without error, but it fails to run. I double check it. All of my libs and tools are 32-bit. Thank you very much for your help. Regards, Mikl?s 2014-06-04 18:50 GMT+02:00 Erik H <ice.rikh(a)gmail.com>: > This is educational for me; to minimize pain, I settled on visual studio + > intel compiler long ago whenever I am coerced into windows development. > > You mentioned that did some surfing; did you encounter this page > <http://www.secker.nl/2012/03/08/setup-python-2-7-2-and-mingw-on-windows-xp/>? > Apparently, mingw should be able to link against the standard, visual > studio compiled python lib. Which would be a blessing for you if it > works... Are you trying to build 32-bit binaries linked against 64-bit > python libs by any chance? > > If you don't get any joy, I'll try setting up an official python binaries > + mingw environment on my windwoes system at home after work today or > tomorrow. Are you strictly targeting 2.7? > > -Erik > > > On Wed, Jun 4, 2014 at 3:07 AM, Mikl?s T?th <spiralfuzet(a)gmail.com> wrote: > >> Hi Erik, >> >> Thanks for the response. >> Yes I'm using makefile but I think the problem is different. >> Here is the gcc command that fails: >> gcc -c -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall >> -Wstrict-prototypes -I. -IInclude -I./Include -DPy_BUILD_CORE -o >> Python/asdl.o Python/asdl.c >> It has a -I./Include argument. >> >> So, I surf the Internet (a lot) and I found that at initial there were no >> autotool support for installing python from source. >> Later I found a Python 3.4 page were I could download an src setup for >> mingw installation. Unfortunatly that doesn't work either. >> So I reinstalled my Python and somehow I could link the library to my >> project. (I don't know how this possible, but the latest version of 2.7 >> works with my project. Blind luck I guess.) I could use >> PyRun_SimpleString but the PyRun_SimpleFileEx call crashes for some >> reason. >> Than I tried boost::python and it crashes aswell at the first object >> result = eval("5/2"); call. >> (I didn't forget to call Py_Initialize();). >> >> Any suggestions? >> >> Thanks, >> Mikl?s >> >> >> 2014-06-03 23:18 GMT+02:00 Erik H <ice.rikh(a)gmail.com>: >> >> Hi Mikl?s, >>> >>> Are you using a makefile? If so, it looks like you need to >>> add -I/cygdrive/e/INSTALL/python_src/Python-2.7.6/Include to the Makefile's >>> CFLAGS or CC variable, or somehow ensure that >>> -I/cygdrive/e/INSTALL/python_src/Python-2.7.6/Include is passed to the >>> compiler in any case. >>> >>> Regards, >>> Erik >>> >>> >>> On Mon, Jun 2, 2014 at 3:17 AM, Mikl?s T?th <spiralfuzet(a)gmail.com> >>> wrote: >>> >>>> Hi! >>>> >>>> Any updates on this? >>>> I get the following error: >>>> >>>> /cygdrive/e/INSTALL/python_src/Python-2.7.6 >>>> $ mingw32-make >>>> process_begin: CreateProcess(NULL, /usr/bin/mkdir -p Include, ...) failed. >>>> make (e=2): The system cannot find the file specified. >>>> mingw32-make: *** [Include/graminit.h] Error 2 >>>> >>>> but the corresponding file is there: >>>> >>>> /cygdrive/e/INSTALL/python_src/Python-2.7.6 >>>> $ ls Include/g*Include/genobject.h Include/graminit.h Include/grammar.h >>>> >>>> What am I missing? Any thoughts? >>>> >>>> Thanks, >>>> Mikl?s >>>> >>>> >>>> 2014-05-27 14:06 GMT+02:00 Mikl?s T?th <spiralfuzet(a)gmail.com>: >>>> >>>> Hi All, >>>>> I want to embed python in my c++ code using boost.python library. >>>>> As far as I understand I need python headers and libs. >>>>> So my python27.lib is "incompatible". I want to compile it from code >>>>> but I failed with mingw32. >>>>> Could you give me some advice, or links to achieve my goal? >>>>> I'm using gcc4.6.3 and qt 4.8.2 and boost 1.49 on windows 7. >>>>> Thanks, >>>>> Mikl?s >>>>> >>>> >>>> >>>> _______________________________________________ >>>> Boost-users mailing list >>>> Boost-users(a)lists.boost.org >>>> http://lists.boost.org/mailman/listinfo.cgi/boost-users >>>> >>> >>> >>> _______________________________________________ >>> Boost-users mailing list >>> Boost-users(a)lists.boost.org >>> http://lists.boost.org/mailman/listinfo.cgi/boost-users >>> >> >> >> _______________________________________________ >> Boost-users mailing list >> Boost-users(a)lists.boost.org >> http://lists.boost.org/mailman/listinfo.cgi/boost-users >> > > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

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Boost program_options - is there a way to make abbreviations for short options
by tenspd137 . 06 Jun '14

06 Jun '14

Hi all, I was trying to figure out if there is a way to make the short options use more than one letter to create an abbrieviation. For example: desc.add_options() ("resolution","re","Choose resolution") ("raster-level,"rl","Chhose raster mode") .... I know that by convention and definition, short options are just -(letter), so that when you ask to print help, you get something like: -r [--resolution] arg -r [--raster-level] arg but I would like to find a way to have -re [--resolution] arg -rl [--raster-level] arg Point is, I have some options that start with the same letter, so being able to make short abbreivations or acronyms for them would be helpful. If this is possible, it isn't real clear to me how, and I haven't turned up much in google. Any suggestions? Thanks!

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Boost.Pimpl upcoming formal review (June 15 - June 24)
by Glen Fernandes 05 Jun '14

05 Jun '14

The formal review period of Boost.Pimpl by Vladimir Batov is scheduled to begin later this month, on June 15th, and will conclude on June 24th, and we welcome your participation. Vladimir's library provides a mechanism for implementing this popular, and still very relevant, idiom. To borrow his words from the documentation: [quote] In the domain of commercial large-scale software development the following design principles come to the fore: - component-based, modular and API-centered design, - separation of concerns, - implementation hiding, - minimization of compilation and component dependencies, - consistent and recognizable deployment and implementation patterns, multi-platform support. The Pimpl idiom can help great deal achieving those goals. It is a simple yet robust programming technique to minimize coupling via the separation of public interface and private implementation and then implementation hiding. [/quote] Please feel encouraged to browse the source code, documentation, and tests, before the review commences. Any feedback you have prior to the review period is also very appreciated. Source: https://github.com/yet-another-user/boost.pimpl/ Documentation: http://yet-another-user.github.io/boost.pimpl/ Download: https://github.com/yet-another-user/boost.pimpl/archive/master.zip If you would like to submit a review earlier, please provide your thoughts on the following topics: - 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? As well as information on the following questions: - 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 most importantly: - Do you think the library should be accepted as a Boost library? Best, Glen

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is boost context supported on powerpc?-
by David Frank 05 Jun '14

05 Jun '14

Greetings, If it is supported how do I cross compile it from x86 machine, especially the assembler code part? Thanks, Frank

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Sanity check please?: Boost 1_55_0 and building VS2012 static libs?
by g4＠novadsp.com 04 Jun '14

04 Jun '14

Revisiting Boost after a long absence. Any thoughts on the following problem(s)? W7x64 with VS2008,2010,2012 and 2013 installed. VS2012 preferred for regular use. Built with boostrap and b2 b2 -link=static -runtime-link=static -toolset=msvc-11.0. I compile a debug test app with /MTd and attempt to link with libboost_system-vc110-mt-gd-1_55.lib which is the only library close to matching the ABI tag specified here : http://www.boost.org/doc/libs/1_55_0/more/getting_started/windows.html#id46 Ensuing link errors are: 1>libboost_system-vc110-mt-gd-1_55.lib(error_code.obj) : error LNK2038: mismatch detected for '_ITERATOR_DEBUG_LEVEL': value '2' doesn't match value '0' in tcpproxy_server.obj 1>libboost_system-vc110-mt-gd-1_55.lib(error_code.obj) : error LNK2038: mismatch detected for 'RuntimeLibrary': value 'MDd_DynamicDebug' doesn't match value 'MT_StaticRelease' in tcpproxy_server.obj 1>LINK : warning LNK4098: defaultlib 'MSVCRTD' conflicts with use of other libs; use /NODEFAULTLIB:library Many thanks.

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Re: [Boost-users] [serialization] deserialized instance empty even though proper serialize methods called [Honeywell Internal]
by Hickman, Steve (AdvTech) 03 Jun '14

03 Jun '14

Classification: Honeywell Internal All serialize methods (except the base class serialize method) have as their first three lines code like this (with the appropriate BOOST_LOG_TRIVIAL(trace) << CLASS_METHOD << " called"; boost::serialization::void_cast_register<derived, base>( static_cast<derived *>(nullptr), static_cast<base *>(nullptr) ); ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(base); If that's what you're referring to, it didn't fix the problem --- Steve H. ============================================================================================================================================================================================================ This message classified as Honeywell Internal by Hickman, Steve (AdvTech) on Tuesday, June 03, 2014 at 3:34:21 AM. The above classification labels are in accordance with the Honeywell Corporate Classification Policy. The information contained in this electronic message is confidential and intended only for the use of the individual/entity named above, and the information may be privileged. If you, the reader of this message, are not the intended recipient or an employee or agent responsible to deliver this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender and delete the original message. ============================================================================================================================================================================================================ From: Robert Ramey [mailto:robertmacleranramey@gmail.com] Sent: Sunday, June 01, 2014 11:22 AM To: boostusers(a)googlegroups.com Cc: robertmacleranramey(a)gmail.com; boost-users(a)lists.boost.org; Hickman, Steve (AdvTech) Subject: Re: [Boost-users] [serialization] deserialized instance empty even though proper serialize methods called On Saturday, May 31, 2014 2:50:35 PM UTC-7, Robert Ramey wrote: I woke up in the middle of the night. The "registration" base/derived pair is a side effect of class Base { virtual~Base(); template<class Archive); void serialize(Archive ar, const unsigned int version); }; class Derived { virtual~Derived(); template<class Archive); void serialize(Archive ar, const unsigned int version); }; template<class Archive); void Derived::serialize(Archive ar, const unsigned int version){ ar & boost::serialization::base_object<Base &>( *this); // side effect void_cast_register(Base, Derived) which updates the table when DLL is loaded } So I'm guessing that you're not calling the base class serialization so the Base/Derived pair isn't being registered. Solution: explicitly declare, define and call the Base class serialization even though it is empty. or explicitly invoke register void_cast::register base/derived - i forget the exact name. I'll be surprised if that doesn't solve your problem. RObert Ramey

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