March 2013 - Boost-users - lists.boost.org

Trying to cross compile Boost.Python using mingw
by Leonardo Sá 18 Mar '13

18 Mar '13

Hello all, I'm trying to cross compile boost python under linux to windows using the mingw32 compiler. Static linking works great, but when trying to make a dll, I get the following errors: gcc.link.dll bin.v2/libs/python/build/gcc-mingw-mingw32/release/target-os-windows/threadapi-win32/threading-multi/libboost_python-mt.dll.a /usr/bin/i686-w64-mingw32-ld: cannot find -lutil /usr/bin/i686-w64-mingw32-ld: cannot find -lpthread /usr/bin/i686-w64-mingw32-ld: cannot find -ldl collect2: ld returned 1 exit status My compile line is: b2 --with-system --with-date_time --with-python --with-filesystem --with-program_options -j 4 toolset=gcc-mingw32 target-os=windows threadapi=win32 variant=release --layout=tagged -sNO_BZIP2=1 -sNO_ZLIB=1 link=shared All the other libraries (system, date_time, program_options) generate dlls sucessfully. Any help is appreciated. Thanks!

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linker error when using from_simple_string()
by Phil Huffman 18 Mar '13

18 Mar '13

Hello, This line of code: date birthday(from_simple_string(s)); causes this error: Undefined symbols for architecture x86_64: "boost::gregorian::greg_month::get_month_map_ptr()", referenced from: unsigned short boost::date_time::month_str_to_ushort<boost::gregorian::greg_month>(std::string const&) in boost2-aLwtLt.o ld: symbol(s) not found for architecture x86_64 Any help will be appreciated. Thanks. Regards, Phil

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how to reuse a thread
by Victor Yankee 17 Mar '13

17 Mar '13

Hello, I would like to create a boost thread that can be reused to run a variety of functions each with different number of args of different types. I am using C++11 gnu compiler and so maybe a solution using variadics might work? I posted to here: http://stackoverflow.com/questions/15237426/can-a-thread-be-reused-to-run-v… But I am not understanding how. Thank you

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[boost] [arm] Building for ARM
by Michael Powell 17 Mar '13

17 Mar '13

Hello, I wonder, has anyone built Boost for ARM? Specifically, we've got an ARM5 for which I want to use Boost for many of those features, a key one is Spirit2 for at least one domain-specific-language (DSL) exposure, possibly two or three. That I can say, we're working with Mentor Graphics, Code Sourcery Code Bench for ARM for the moment. I think they've got current GCC language support through 4.7.2 if it matters. My only questions are, how feasible a cross compile is Boost? Does the inclusion and linkage go about as smoothly as for any other ARM-destined output? Thanks much in advance. Regards, Michael Powell

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[lexical_cast] Some code that was compiling in 1.50 stopped compiling in 1.53
by Alain Leblanc 17 Mar '13

17 Mar '13

Here's some code that has been compiling till at least 1.50, and starting long before. I isolated the part that breaks to create a program. Here it is: Just taking a std::vector of int and copying into strings. #include <boost/lexical_cast.hpp> #include <vector> #include <string> using namespace std; int main (int, char **) { vector<int> values; vector<string> ret; std::transform(values.begin(), values.end(), ret.begin(), boost::lexical_cast<std::string, int>); } And compiling on fedora 18, gcc 4.7 (Got same issues, I believe, with MSVC 10) I get the output at the bottom. Anyone has an idea on what the problem could be? Thanks, a [aleblanc@localhost base]$ gcc -c TestLexicalCast.cc [aleblanc@localhost base]$ gcc -c -I/home/aleblanc/local/boost_1_53/include/ TestLexicalCast.cc TestLexicalCast.cc: In function ‘int main(int, char**)’: TestLexicalCast.cc:10:98: error: no matching function for call to ‘transform(std::vector<int>::iterator, std::vector<int>::iterator, std::vector<std::basic_string<char> >::iterator, <unresolved overloaded function type>)’ TestLexicalCast.cc:10:98: note: candidates are: In file included from /usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/algorithm:63:0, from /home/aleblanc/local/boost_1_53/include/boost/utility/swap.hpp:24, from /home/aleblanc/local/boost_1_53/include/boost/swap.hpp:10, from /home/aleblanc/local/boost_1_53/include/boost/array.hpp:45, from /home/aleblanc/local/boost_1_53/include/boost/lexical_cast.hpp:158, from TestLexicalCast.cc:1: /usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/bits/stl_algo.h:4940:5: note: template<class _IIter, class _OIter, class _UnaryOperation> _OIter std::transform(_IIter, _IIter, _OIter, _UnaryOperation) /usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/bits/stl_algo.h:4940:5: note: template argument deduction/substitution failed: TestLexicalCast.cc:10:98: note: could not resolve address from overloaded function ‘lexical_cast<std::string, int>’ In file included from /usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/algorithm:63:0, from /home/aleblanc/local/boost_1_53/include/boost/utility/swap.hpp:24, from /home/aleblanc/local/boost_1_53/include/boost/swap.hpp:10, from /home/aleblanc/local/boost_1_53/include/boost/array.hpp:45, from /home/aleblanc/local/boost_1_53/include/boost/lexical_cast.hpp:158, from TestLexicalCast.cc:1: /usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/bits/stl_algo.h:4977:5: note: template<class _IIter1, class _IIter2, class _OIter, class _BinaryOperation> _OIter std::transform(_IIter1, _IIter1, _IIter2, _OIter, _BinaryOperation) /usr/lib/gcc/x86_64-redhat-linux/4.7.2/../../../../include/c++/4.7.2/bits/stl_algo.h:4977:5: note: template argument deduction/substitution failed: TestLexicalCast.cc:10:98: note: could not resolve address from overloaded function ‘lexical_cast<std::string, int>’ [aleblanc@localhost base]$

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[interprocess] message_queue has non const get_num_msg(). Why?
by Gábor Márton 16 Mar '13

16 Mar '13

In 1.53, get_num_msg() is non const. Does it really modify the object? Thanks, Gabor

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[fusion] Defining pixel formats
by Christian Henning 16 Mar '13

16 Mar '13

Hi all, ever since Jang Tongary suggested to use boost::fusion to define pixel types I wondered what he meant by that. I never had the opportunity to get myself familiar with fusion so I started learning it and I'm really amazed how easy the library is to use. I think I'm at a point where I would like to reach to the community for some advice. Let's say I wanna create a homogeneous three channel pixel type, like RGB. For that I would use a fusion map since I want to access channel by name. I also would like to be able to swap channels around to create BGR. How would I do that? namespace boost { namespace gil_3 { struct red_t; struct green_t; struct blue_t; } } // namespace boost::gil_3 void foo() { typedef fusion::map< fusion::pair< gil_3::red_t , boost::uint8_t > , fusion::pair< gil_3::green_t, boost::uint8_t > , fusion::pair< gil_3::blue_t , boost::uint8_t > > rgb8_pixel_t; // not working typedef fusion::reverse_view< rgb8_pixel_t >::type bgr8_pixel_t; rgb8_pixel_t a( 10, 20, 30 ); bgr8_pixel_t b( 30, 20, 10 ); boost::uint8_t red_a = fusion::at_key< gil_3::red_t >( a ); boost::uint8_t red_b = fusion::at_key< gil_3::red_t >( b ); } Thanks! Christian

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[MPL] How to use a mpl::map
by Daniele Barzotti 15 Mar '13

15 Mar '13

Hi, I'm new to MPL and I have difficulties to use the map container. I need to map (and then retrieve) some types based on they ID: I try the following code but it does not work.. sturct MSG_METHOD_CONNECT { .... } template<class MESSAGE> class PBMessage { public: PBMessage() {}; /* ... other methods ... */ private: MESSAGE m_Msg; }; // Map of types. The key is the Message opCode typedef typename mpl::map< mpl::pair<mpl::int_[100], PBMessage<MSG_METHOD_CONNECT> >, mpl::pair<mpl::int_[101], PBMessage<MSG_EVENT_CONNECT> >, > TMessageMap; // The Message type template < typename MessageMap, int opCode > typedef typename mpl::at<MessageMap, mpl::int_<opCode> >::type::value TMessage; And to retrieve the type: TMessage<TMessageMap, opCode> msg; Could someone give me some suggestions? Regards, Daniele.

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[serialization, archive] Serialize boost::shared_ptr to custom archive
by Silviu P 15 Mar '13

15 Mar '13

Hi, I'm trying to serialize a boost::shared_ptr to a custom archive. The compiler complains about the archive missing methods 'append' and 'reset'. Does anyone know where I should look to find out more information about these two methods? I wasn't able to find any documentation when looking at the Archive Concept about these two methods, and text_iarchive, together with its base classes, don't seem to declare it. On the other hand, boost::archive::text_iarchive compiles fine. Here are the compile errors I see: /usr/include/boost/serialization/shared_ptr.hpp:133:9: error: ‘class my_iarchive’ has no member named ‘append’ /usr/include/boost/serialization/shared_ptr.hpp:139:5: error: ‘class my_iarchive’ has no member named ‘reset’ My boost version is 1.46 (which comes with openSuse 12.1) Thank you in advance.

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[graph][PBGL] Remove edge broken reference
by Borja Miñano 15 Mar '13

15 Mar '13

Hello, I had a problem after removing some edges from my graph. I am using the graph_parallel library. And this problem did not happened me when using the serial one. I use a predicate to remove edges, and it seems to work, it deletes the local edges and the crossing edges (source local -> target ghost). But if after that I want to iterate over the in_edges The iterator returns references to edges that does not exists any more. For example, if I had 30 in_edges and the removing process eliminate 20, then the in_edge iterator iterates over 10, but with wrong references. Could anyone help debugging this problem? I think it might be an own problem, but I don't know how to check it. -- Un saludo, Borja Miñano IAC3 - Universitat de les Illes Balears ParcBit - Edifici 17 (Disset); Local D7 Cra. Valldemossa km. 7,4 E-07121 Palma de Mallorca. Balears. Spain. Phone: +34 871 967 434

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Review Wizard Status Report for March 2013
by Ronald Garcia 14 Mar '13

14 Mar '13

============================================== Review Wizard Status Report for March 2013 ============================================== News ==== 1. Boost 1.52.0 Released. No New Libraries. 2. Boost 1.53.0 Released. New Libraries: Atomic, Coroutine, Lockfree, Multiprecision, Odeint. Open Issues =========== The following libraries have review managers, but have not yet been scheduled for review: * Range Extensions - added May 2012; review manager: Neil Groves. The following libraries have been reviewed and await reports from their review managers: * Predef - reviewed February 2012; review manager: Joel Falcou. The following libraries have been accepted to Boost, but have not yet been submitted to SVN: * Constrained Value - accepted September 2010; author: Robert Kawulak. * GIL.IO - accepted January 2011; author: Christian Henning. * Contract - accepted September 2012; author: Lorenzo Caminiti. The following libraries have been accepted and submitted to SVN, but have not yet appeared in a release: * Type Traits Introspection - accepted August 2011; author: Edward Diener. * Type Erasure - accepted August 2012; author: Steven Watanabe The following libraries have been accepted provisionally to Boost, but have not been submitted for mini-review and full acceptance: * Endian - accepted provisionally November 2011; author: Beman Dawes. * Log - accepted provisionally March 2010; author: Andrey Semashev. General Announcements ===================== As always, we need experienced review managers. Please take a look at the list of libraries in need of managers and check out their descriptions. In general review managers are active boost participants, including library contributors, infrastructure contributors, and other mailing list participants with a substantial track record of constructive participation. If you can serve as review manager for any of them, email Ron Garcia or John Phillips, "rxg at cs dot cmu dot edu" and "phillips at pacific dot mps dot ohio-state dot edu" respectively. We are also suffering from a lack of reviewers. While we all understand time pressures and the need to complete paying work, the strength of Boost is based on the detailed and informed reviews submitted by you. If you are interested in reviewing a library but won't have time during the review period, you can always prepare your review ahead of time. No rule says you can only work on a review during the review period. A link to this report will be posted to www.boost.org. If you would like us to make any modifications or additions to this report, please email Ron or John. The review schedule is an unordered list of the libraries awaiting review. As such, any library on the schedule can be reviewed once the developer is ready, a review manager has been secured, and the manager, developer, and wizards agree on a date to schedule the review. Review Schedule =============== * Join (M) * Pimpl (M) * Sorting (M) * Quaternions, Vectors, Matrices (M) * Variadic Macro Data (M) * Block Pointer (M) * Singularity (M) * Extended Complex Numbers (M) * Metaparse (M) * Range Extensions * Nowide (M) * Array (M) * TypeIndex (M) * STL Extensions (M) * Countertree (M) * Process (M) ``(M)`` marks libraries that need review managers. -------------------- Join ---- :Author: Yigong Liu :Review Manager: Needed :Download: http://channel.sourceforge.net/ :Description: Join is an asynchronous, message based C++ concurrency library based on join calculus. It is applicable both to multi-threaded applications and to the orchestration of asynchronous, event-based applications. It follows Comega's design and implementation and builds with Boost facilities. It provides a high level concurrency API with asynchronous methods, synchronous methods, and chords which are "join-patterns" defining the synchronization, asynchrony, and concurrency. Pimpl ----- :Author: Vladimir Batov :Review Manager: Needed :Download: https://github.com/boost-vault/Miscellaneous/blob/master/Pimpl.zip :Description: The Pimpl idiom is a simple yet robust technique to minimize coupling via the separation of interface and implementation and then implementation hiding. This library provides a convenient yet flexible and generic deployment technique for the Pimpl idiom. It's seemingly complete and broadly applicable, yet minimal, simple and pleasant to use. Sorting ------- :Author: Steven Ross :Review Manager: Needed :Download: https://github.com/boost-vault/Sorting :Description: A grouping of 3 templated hybrid radix/comparison-based sorting algorithms that provide superior worst-case and average-case performance to std::sort: integer_sort, which sorts fixed-size data types that support a rightshift (default of >>) and a comparison (default of <) operator. float_sort, which sorts standard floating-point numbers by safely casting them to integers. string_sort, which sorts variable-length data types, and is optimized for 8-bit character strings. All 3 algorithms have O(n(k/s + s)) runtime where k is the number of bits in the data type and s is a constant, and limited memory overhead (in the kB for realistic inputs). In testing, integer_sort varies from 35% faster to 2X as fast as std::sort, depending on processor, compiler optimizations, and data distribution. float_sort is roughly 70% faster than std::sort. string_sort is roughly 2X as fast as std::sort. Quaternions, Vectors, Matrices ------------------------------ :Author: Emil Dotchevski :Review Manager: Needed :Download: http://www.revergestudios.com/boost-qvm/ :Description: QVM defines a set of generic functions and operator overloads for working with quaternions, vectors and matrices of static size. The library also defines vector and matrix data types, however it allows users to introduce their own types by specializing the q_traits, v_traits and m_traits templates. Variadic Macro Data ------------------- :Author: Edward Diener :Review Manager: Needed :Download: `Boost Sandbox <http://svn.boost.org/svn/boost/sandbox/variadic_macro_data/>`__ :Description: This library adds support and functionality for variadic macros to Boost as well as integrating variadic macros with the Boost PP library without changing the latter library in any way. Block Pointer ------------- :Author: Phil Bouchard :Review Manager: Needed :Download: https://svn.boost.org/svn/boost/sandbox/block_ptr/ :Description: Deterministic memory manager of constant complexity capable of handling cyclic collections. Singularity ----------- :Author: Ben Robinson :Review Manager: Needed :Download: https://github.com/cppmaven/Singularity :Description: The Singularity Design Pattern allows you to restrict any class to a single instance. Unlike the infamous Singleton, Singularity gives you direct control over the lifetime of the object, does not require you to grant global access to the object, nor does it limit you to the default constructor for that object. Extended Complex Numbers ------------------------ :Author: Matthieu Schaller :Review Manager: Needed :Download: http://code.google.com/p/cpp-imaginary-numbers/ :Description: The library is an extension of the std::complex class addressing two issues: 1. The standard does not guaranty the behaviour of the complex class if instantiated with types other than float/double/long double. 2. Some calculation where pure imaginary numbers (i.e. multiples of sqrt(-1)) appear are unnecessarily slowed down due to the lack of support for these numbers. The code I submit contains two interleaved classes boost::complex and boost::imaginary which can be instantiated with any type T provided T overloads the usual arithmetic operators and some basic (real) mathematical functions depending on which complex function will be used. It is thus an extended version of Thorsten Ottosen's n1869 proposal (http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2005/n1869.html) Metaparse --------- :Author: Abel Sinkovics :Review Manager: Needed :Download: http://abel.web.elte.hu/metaparse/metaparse.zip :Description: Metaparse is a library for constructing parsers parsing at compile-time based on template metaprogramming. The parsers built with the library take boost::mpl::strings as input and can produce - types - objects (types with public static members) - callable C++ functions (types with public static method) - template metafunction classes as output (based on the input being parsed). On compilers supporting constexpr the library provides the following syntactic sugar for writing the input of the parsers: BOOST_STRING("this is a string") The library can be used for implementing DSLs in C++, including DSLs making C++ template metaprogramming easier (see examples). Range Extensions ---------------- :Author: Akira Takahashi :Review Manager: Neil Groves :Download: https://github.com/faithandbrave/OvenToBoost :Description: This project adds some features of the Oven Range Library to Boost.Range. Features: - Additional Range Adaptors (taken, taken_while, dropped, dropped_while, elements, elements_key, memoized, outdirected) - Extensions for using Lambda (regular function, regular operator) - Infinite Range (iteration function) - and additional range utilities. Nowide ------ :Author: Artyom Beilis :Review Manager: Needed :Download: http://cppcms.com/files/nowide/ :Description: This library makes cross platform Unicode aware programming easier. It provides an implementation of standard C and C++ library functions, such that their inputs are UTF-8 aware on Windows without requiring to use Wide API. Array ----- :Author: Brian Smith :Review Manager: Needed :Download: https://github.com/BrianJSmith/Array :Description: The array class is a C++11 compatible implementation of static multidimensional arrays. TypeIndex --------- :Author: Antony Polukhin :Review Manager: Needed :Download: https://github.com/apolukhin/type_index :Description: TypeIndex is an extended C++11 type_index library, that * works with disabled RTTI * can store const-volatile-reference info about types (if user requested it) * has all the functionality of std::type_index * has portable across compilers and platforms functionality for getting demangled type names * works across modules/shared libraries * does not require C++11 to work STL Extensions -------------- :Author: Vadim Stadnik :Review Manager: Needed :Download: https://github.com/vstadnik/stl_ext_adv_review :Description: The proposed library [stl_ext_adv] offers augmented array based B+ trees and STL containers that support the interfaces of the C++03 sequences and associative containers. The library offers a number of extensions and performance improvements that are not available in C++03 and C++11 standard containers. Countertree ----------- :Author: Francisco Jose Tapia :Review Manager: Needed :Download: https://dl.dropbox.com/u/8437476/works/countertree_code_doc.zip :Description: This library is an implementation of a binary red-black counter tree. This tree have an additional counter in each leaf. This permit the access to the elements by the position, like in a vector. It is a random access container with random access iterators. COUNTERTREE This kind of trees have an additional counter in each leaf. This permit the access to the elements by the position, like in a vector. It is a random access container with random access iterators. With unordered information we have a vector with the same speed inserting and deleting in any position (O(log N)). With ordered information, we have the classes set, multiset, map and multimap, with identical interface than the STL classes, with the plus of access to the elements by position, like in a vector. The iterators are random access , and you can subtract them. SUBALLOCATOR The suballocator is a layer between the allocator and the data structures, compatible with any allocator with the STL definition. The suballocator replace to the allocator in the allocation of equal size elements. It provides speed, return the unused memory and decrease the memory used by the program and improve the cache performance due to the data locality improvement ( 30% of improvement of speed respect the std::allocator with GCC 4.7) Process ------- :Author: Boris Schaeling :Download: http://www.highscore.de/boost/process0.5/process.zip :Description: Boost.Process is a library to manage system processes. It can be used to: * create child processes * setup streams for child processes * communicate with child processes through streams (synchronously or asynchronously) * wait for processes to exit (synchronously or asynchronously) * terminate processes Libraries under development =========================== See http://svn.boost.org/trac/boost/wiki/LibrariesUnderConstruction for a current listing of libraries under development.

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Problems linking on Mac OSX 10.8
by Tim Burgess 14 Mar '13

14 Mar '13

Hi, I have a project within XCode 4.6 on Mac OSX 10.8 that won't link against the static serialisation library (the project also uses some other Boost binaries, which link fine). My Boost build options are: macosx-version=10.3 maxosx-vesion-min=10.6 architecture=combined threading=multi link=static address-model=32_64 The project uses the XCode GCC compiler option, as it also uses the wxWidgets libraries, which won't work with the default compiler. The errors take the form: Undefined symbols for architecture x86_64: "boost::archive::basic_xml_iarchive<boost::archive::xml_wiarchive>::load_sta rt(char const*)", referenced from: void boost::archive::basic_xml_iarchive<boost::archive::xml_wiarchive>::load_over ride<std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> > >(boost::serialization::nvp<std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> > > const&, int)in SurfaceFrame.o Can anybody offer any advice, please? I've read a lot of articles on StackOverflow that seem to discuss this problem, but none have pointed to a solution. Best wishes. Tim Burgess Raised Bar Ltd. Tel: +44 (0)1827 719822 Web: http://www.raisedbar.net We can supply Roland and Avid products with specialist pre and post-sales support for visually-impaired users - just drop us a line for a quote. Don't forget to sign our on-line petition to lobby for improved access to music education and music technology at: http://www.raisedbar.net/petition.htm

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[posix_time] time_from_string Not Thread-Safe?
by Hering Cheng 14 Mar '13

14 Mar '13

Hi, If I invoke boost::posix_time::time_from_string() from multiple threads I get a core dump: #0 0x00000000006ded78 in std::_Rb_tree<std::string, std::pair<std::string const, unsigned short>, std::_Select1st<std::pair<std::string const, unsigned short> >, std::less<std::string>, std::allocator<std::pair<std::string const, unsigned short> > >::_M_insert_unique(std::pair<std::string const, unsigned short> const&) [clone .constprop.93] () (gdb) where #0 0x00000000006ded78 in std::_Rb_tree<std::string, std::pair<std::string const, unsigned short>, std::_Select1st<std::pair<std::string const, unsigned short> >, std::less<std::string>, std::allocator<std::pair<std::string const, unsigned short> > >::_M_insert_unique(std::pair<std::string const, unsigned short> const&) [clone .constprop.93] () #1 0x00000000006df400 in boost::gregorian::greg_month::get_month_map_ptr() () #2 0x00007f0dfbc590cd in boost::date_time::month_str_to_ushort<boost::gregorian::greg_month> (s=...) at /home/chenher/projects/cactus_strategies/cactus_includes/boost/date_time/date_parsing.hpp:67 #3 0x00007f0dfbc29115 in boost::date_time::parse_date<boost::gregorian::date> (s=..., order_spec=0) at /home/chenher/projects/cactus_strategies/cactus_includes/boost/date_time/date_parsing.hpp:143 #4 0x00007f0dfbc7b96f in parse_delimited_time<boost::posix_time::ptime> (s=..., sep=<optimized out>) at /home/chenher/projects/cactus_strategies/cactus_includes/boost/date_time/time_parsing.hpp:175 #5 time_from_string (s=...) at /home/chenher/boost/date_time/posix_time/time_parsers.hpp:31 Looking at *libs/date_time/src/gregorian/greg_month.cpp*:37, it is apparent that the use of a static variable renders the *month_map *not thread-safe: greg_month::month_map_ptr_type greg_month::get_month_map_ptr() { static month_map_ptr_type month_map_ptr(new greg_month::month_map_type()); if(month_map_ptr->empty()) { std::string s(""); for(unsigned short i = 1; i <= 12; ++i) { greg_month m(static_cast<month_enum>(i)); s = m.as_long_string(); s = date_time::convert_to_lower(s); month_map_ptr->insert(std::make_pair(s, i)); s = m.as_short_string(); s = date_time::convert_to_lower(s); month_map_ptr->insert(std::make_pair(s, i)); } } return month_map_ptr; } Is there any way around this? Is there a general initialization routine I can call to get all such use of static initialized by a single thread? Thanks. Hering Cheng

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[graph][BGL] Why can not I use edge_index_t?
by bminano 14 Mar '13

14 Mar '13

Hello, I want to create an iterator_property_map to iterate over the edges, but I cannot declare the following: typedef property_map<Graph, edge_index_t>::const_type EdgeIndexMap; The compilation gives me an error. I am using an adjacency list with vertex and edge properties. I can use a vertex_index_t, so I assumed that I could use the equivalent for edges. But I don't understand why I can't. This is my adjacency list: typedef boost::adjacency_list<vecS, distributedS<mpi_process_group, vecS>, bidirectionalS, property<vertex_index_t, int>, EdgeProperties> Graph; Have anyone deal with something similar? Thank you -- View this message in context: http://boost.2283326.n4.nabble.com/graph-BGL-Why-can-not-I-use-edge-index-t… Sent from the Boost - Users mailing list archive at Nabble.com.

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[Interprocess] robust mutex support
by Gábor Márton 14 Mar '13

14 Mar '13

Hi, I would like to take the advantages of the robust pthread mutex attribute. Is it possible in 1.53? If no, are there any plans to implement robust mutex support in Interprocess, in future releases? Note: I've found the following discussion http://boost.2283326.n4.nabble.com/boost-interprocess-gt-1-45-robust-mutexe… Based on this, I should modify the file boost/interprocess/sync/posix/pthread_helpers.hpp, but I don't want to create an unofficial patch to the boost libs. Thanks, Gabor

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[Smart pointers] BOOST_SP_HAS_SYNC undefined on ARM
by Vaclav Barta 14 Mar '13

14 Mar '13

Hi, I've been looking at some traces of our Android app (which is mostly native and extensively uses boost) and was surprised to find it uses spinlocks around the reference count of boost::shared_ptr. So I've checked the boost sources and found boost/smart_ptr/detail/atomic_count.hpp choosing the implementation depending on platform and other #defines, of which BOOST_SP_HAS_SYNC sounded like it should be turned on (Google recommends using gcc __sync_* intrinsics on Android). But, boost/smart_ptr/detail/sp_has_sync.hpp requires either __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 (which the Google cross-compiler apparently doesn't have), or (for recent gcc) #define BOOST_SP_HAS_SYNC #if defined( __arm__ ) || defined( __armel__ ) #undef BOOST_SP_HAS_SYNC #endif Why not use the intrinsics on ARM? Are they broken? For all ARM variants, or just some (ideally some old ones - I cound ignore them then)? Or are the intrinsics' semantics incompatible with the way boost atomic count needs? Bye Vasek -- http://www.mangrove.cz/

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Supressing GCCs 'MACRONAME' is not defined [-Wundef]
by Roman Himmes 13 Mar '13

13 Mar '13

Hi! After compiling boost_1_53_0 I got a lot of MACROS are not defined messages compiling my project. To suppress those warnings I changed the boost/config.hpp and appended: #define BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION 0 #define BOOST_MPL_HAS_XXX_NO_WRAPPED_TYPES 0 #define BOOST_MPL_HAS_XXX_NO_EXPLICIT_TEST_FUNCTION 0 #define BOOST_MPL_HAS_XXX_NEEDS_TEMPLATE_SFINAE 0 #define BOOST_PP_VARIADICS_MSVC 0 #define BOOST_IOSTREAMS_GCC_WORKAROUND_GUARD 0 #define BOOST_SELECT_BY_SIZE_MAX_CASE 0 #define BOOST_PP_VARIADICS_MSVC 0 #define BOOST_FT_CC_IMPLICIT 0 #define BOOST_FT_CC_CDECL 0 #define BOOST_FT_CC_STDCALL 0 #define BOOST_FT_CC_PASCAL 0 #define BOOST_FT_CC_FASTCALL 0 #define BOOST_FT_CC_CLRCALL 0 #define BOOST_FT_CC_THISCALL 0 #define BOOST_FT_CC_IMPLICIT_THISCALL 0too I realize that this is very dangerous and definitly not the way to go. Any Idea how to suppress those warnings correctly? I am using Arch-Linux with gcc-4.7.2. I compiled boost with (as far as I remember): ./b2 toolset=gcc cxxflags=-std=c++11 link=static stage Best Regards, Roman Himmes -- Softwareentwicklung iDev GmbH Spichernstr. 73 50672 Köln Tel: +49 221 / 222 858-0 Fax: +49 221 / 222 858-20 E-Mail: himmes(a)idev.de WWW: www.idev.de AG Köln HRB 58720 Geschäftsführung: Michael Mertens

3 2

[serialization] C alternative for boost serialization
by Arash Abghari 13 Mar '13

13 Mar '13

Hi, We are heavily using boost serialization and verty happy with that. But we need to port some of our code to an embedded system where there is no c++ compiler available. Can anyone suggest an alternative C library for serialization? Thanks, Arash

3 3

[Format] NaN values?
by John M. Dlugosz 13 Mar '13

13 Mar '13

Hmm, might boost::format("%.1f") be producing a result of "-1.$" when fed a NAN? It looks suspiciously like the string "-1.#INF" mentioned in printf formatting documentation.

1 0

Building Boost for iOS projects
by Daniel Ford 12 Mar '13

12 Mar '13

I'm trying to use some of the compiled boost libraries for an iOS project. Ideally, it would be nice to get a framework, but getting anything which works would be great. I've tried following the instructions here http://goodliffe.blogspot.com/2010/09/building-boost-framework-for-ios-ipho…<http://www.google.com/url?q=http%3A%2F%2Fgoodliffe.blogspot.com%2F2010%2F09…> to build a boost framework, making the obvious changes to the version numbers of the SDK and Boost, and swapping the compiler to llvm-gcc-4.2 because I don't seem to have gcc-4.2. However, I get errors like this: boostoniphone/src/boost_1_52_0/tools/build/v2/build/feature.jam:767: in expand-composites from module feature error: explicitly-specified values of non-free feature <toolset-darwin:version> conflict error: existing values: 4.2.1~iphonesim 6.0.0~iphonesim error: value from expanding <toolset-darwin:version>6.0.0~iphonesim : 6.0.0~iphonesim I've also been trying this approach here http://www.a-coding.com/2011/01/building-boost-for-ios.html<http://www.google.com/url?q=http%3A%2F%2Fwww.a-coding.com%2F2011%2F01%2Fbui…> which seems to be building most of the .a files OK. I'm not particularly experienced with build systems and libraries (I do algorithms and statistics usually) so I have a few of questions: Is there some obvious way to make the framework script work? Is there some way to just use the .a files I'm getting from the second approach and bundle them up? Or do I just add the .a files generated by the second approach to my project and be done with it? Has anyone else done this by another method, or can suggest how to set user-config.jam to get the libraries I want? Thanks, Daniel

1 0

program_options - example will not compile
by Neil Sutton 12 Mar '13

12 Mar '13

I have the following: 1. */usr/local/lib/* which contains libboost_program_options.a libboost_program_options.so libboost_program_options.so_1.53.0 2. /usr/local/include/boost that contains program_options.hpp I want to compile this file which can be found in boost /libs/program_options/examples: ---------------------------------- // Copyright Vladimir Prus 2002-2004. // Distributed under the Boost Software License, Version 1.0. // (See accompanying file LICENSE_1_0.txt // or copy at http://www.boost.org/LICENSE_1_0.txt) /* The simplest usage of the library. */ #include <boost/program_options.hpp> namespace po = boost::program_options; #include <iostream> #include <iterator> using namespace std; int main(int ac, char* av[]) { try { po::options_description desc("Allowed options"); desc.add_options() ("help", "produce help message") ("compression", po::value<double>(), "set compression level") ; po::variables_map vm; po::store(po::parse_command_line(ac, av, desc), vm); po::notify(vm); if (vm.count("help")) { cout << desc << "\n"; return 0; } if (vm.count("compression")) { cout << "Compression level was set to " << vm["compression"].as<double>() << ".\n"; } else { cout << "Compression level was not set.\n"; } } catch(exception& e) { cerr << "error: " << e.what() << "\n"; return 1; } catch(...) { cerr << "Exception of unknown type!\n"; } return 0; } ----------------------------- A. g++ error. This is the command I am using with g++ g++ first.cpp -o first -L/usr/local/lib/libboost_program_options.so and this is the error output: ------------ /tmp/cctMoqyr.o: In function `main': first.cpp:(.text+0x1a): undefined reference to `boost::program_options::options_description::m_default_line_length' first.cpp:(.text+0x2a): undefined reference to `boost::program_options::options_description::m_default_line_length' first.cpp:(.text+0x72): undefined reference to `boost::program_options::options_description::options_description(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned int, unsigned int)' first.cpp:(.text+0xed): undefined reference to `boost::program_options::options_description::add_options()' first.cpp:(.text+0x10b): undefined reference to `boost::program_options::options_description_easy_init::operator()(char const*, char const*)' first.cpp:(.text+0x127): undefined reference to `boost::program_options::options_description_easy_init::operator()(char const*, boost::program_options::value_semantic const*, char const*)' first.cpp:(.text+0x135): undefined reference to `boost::program_options::variables_map::variables_map()' first.cpp:(.text+0x191): undefined reference to `boost::program_options::store(boost::program_options::basic_parsed_options<char> const&, boost::program_options::variables_map&, bool)' first.cpp:(.text+0x1e6): undefined reference to `boost::program_options::notify(boost::program_options::variables_map&)' first.cpp:(.text+0x28b): undefined reference to `boost::program_options::operator<<(std::basic_ostream<char, std::char_traits<char> >&, boost::program_options::options_description const&)' /tmp/cctMoqyr.o: In function `boost::program_options::error_with_option_name::~error_with_option_name()': first.cpp:(.text._ZN5boost15program_options22error_with_option_nameD2Ev[boost::program_options::error_with_option_name::~error_with_option_name()]+0xd): undefined reference to `vtable for boost::program_options::error_with_option_name' /tmp/cctMoqyr.o: In function `boost::program_options::validation_error::validation_error(boost::program_options::validation_error::kind_t, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)': first.cpp:(.text._ZN5boost15program_options16validation_errorC1ENS1_6kind_tERKSsS4_i[boost::program_options::validation_error::validation_error(boost::program_options::validation_error::kind_t, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)]+0x1d): undefined reference to `boost::program_options::validation_error::get_template(boost::program_options::validation_error::kind_t)' first.cpp:(.text._ZN5boost15program_options16validation_errorC1ENS1_6kind_tERKSsS4_i[boost::program_options::validation_error::validation_error(boost::program_options::validation_error::kind_t, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)]+0x47): undefined reference to `boost::program_options::error_with_option_name::error_with_option_name(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)' /tmp/cctMoqyr.o: In function `boost::program_options::value_semantic_codecvt_helper<char>::value_semantic_codecvt_helper()': first.cpp:(.text._ZN5boost15program_options29value_semantic_codecvt_helperIcEC2Ev[boost::program_options::value_semantic_codecvt_helper<char>::value_semantic_codecvt_helper()]+0x16): undefined reference to `vtable for boost::program_options::value_semantic_codecvt_helper<char>' /tmp/cctMoqyr.o: In function `boost::program_options::value_semantic_codecvt_helper<char>::~value_semantic_codecvt_helper()': first.cpp:(.text._ZN5boost15program_options29value_semantic_codecvt_helperIcED2Ev[boost::program_options::value_semantic_codecvt_helper<char>::~value_semantic_codecvt_helper()]+0xb): undefined reference to `vtable for boost::program_options::value_semantic_codecvt_helper<char>' /tmp/cctMoqyr.o: In function `boost::program_options::variables_map::operator[](std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const': first.cpp:(.text._ZNK5boost15program_options13variables_mapixERKSs[boost::program_options::variables_map::operator[](std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const]+0x14): undefined reference to `boost::program_options::abstract_variables_map::operator[](std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const' /tmp/cctMoqyr.o: In function `boost::program_options::variables_map::~variables_map()': first.cpp:(.text._ZN5boost15program_options13variables_mapD1Ev[boost::program_options::variables_map::~variables_map()]+0xd): undefined reference to `vtable for boost::program_options::variables_map' /tmp/cctMoqyr.o: In function `boost::program_options::basic_command_line_parser<char>::basic_command_line_parser(int, char const* const*)': first.cpp:(.text._ZN5boost15program_options25basic_command_line_parserIcEC1EiPKPKc[boost::program_options::basic_command_line_parser<char>::basic_command_line_parser(int, char const* const*)]+0x6b): undefined reference to `boost::program_options::detail::cmdline::cmdline(std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&)' /tmp/cctMoqyr.o: In function `boost::program_options::basic_command_line_parser<char>::options(boost::program_options::options_description const&)': first.cpp:(.text._ZN5boost15program_options25basic_command_line_parserIcE7optionsERKNS0_19options_descriptionE[boost::program_options::basic_command_line_parser<char>::options(boost::program_options::options_description const&)]+0x14): undefined reference to `boost::program_options::detail::cmdline::set_options_description(boost::program_options::options_description const&)' /tmp/cctMoqyr.o: In function `boost::program_options::basic_command_line_parser<char>::style(int)': first.cpp:(.text._ZN5boost15program_options25basic_command_line_parserIcE5styleEi[boost::program_options::basic_command_line_parser<char>::style(int)]+0x14): undefined reference to `boost::program_options::detail::cmdline::style(int)' /tmp/cctMoqyr.o: In function `boost::program_options::basic_command_line_parser<char>::extra_parser(boost::function1<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&>)': first.cpp:(.text._ZN5boost15program_options25basic_command_line_parserIcE12extra_parserENS_9function1ISt4pairISsSsERKSsEE[boost::program_options::basic_command_line_parser<char>::extra_parser(boost::function1<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&>)]+0x28): undefined reference to `boost::program_options::detail::cmdline::set_additional_parser(boost::function1<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&>)' /tmp/cctMoqyr.o: In function `boost::program_options::basic_command_line_parser<char>::run()': first.cpp:(.text._ZN5boost15program_options25basic_command_line_parserIcE3runEv[boost::program_options::basic_command_line_parser<char>::run()]+0x12): undefined reference to `boost::program_options::detail::cmdline::get_canonical_option_prefix()' first.cpp:(.text._ZN5boost15program_options25basic_command_line_parserIcE3runEv[boost::program_options::basic_command_line_parser<char>::run()]+0x3d): undefined reference to `boost::program_options::detail::cmdline::run()' /tmp/cctMoqyr.o: In function `std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > boost::program_options::to_internal<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >(std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&)': first.cpp:(.text._ZN5boost15program_options11to_internalISsEESt6vectorISsSaISsEERKS2_IT_SaIS5_EE[std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > boost::program_options::to_internal<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >(std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&)]+0x3c): undefined reference to `boost::program_options::to_internal(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)' /tmp/cctMoqyr.o:(.rodata._ZTVN5boost15program_options11typed_valueIdcEE[vtable for boost::program_options::typed_value<double, char>]+0x1c): undefined reference to `boost::program_options::value_semantic_codecvt_helper<char>::parse(boost::any&, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, bool) const' /tmp/cctMoqyr.o:(.rodata._ZTVN5boost15program_options20invalid_option_valueE[vtable for boost::program_options::invalid_option_value]+0x10): undefined reference to `boost::program_options::error_with_option_name::what() const' /tmp/cctMoqyr.o:(.rodata._ZTVN5boost15program_options20invalid_option_valueE[vtable for boost::program_options::invalid_option_value]+0x18): undefined reference to `boost::program_options::error_with_option_name::substitute_placeholders(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const' /tmp/cctMoqyr.o:(.rodata._ZTVN5boost15program_options16validation_errorE[vtable for boost::program_options::validation_error]+0x10): undefined reference to `boost::program_options::error_with_option_name::what() const' /tmp/cctMoqyr.o:(.rodata._ZTVN5boost15program_options16validation_errorE[vtable for boost::program_options::validation_error]+0x18): undefined reference to `boost::program_options::error_with_option_name::substitute_placeholders(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const' /tmp/cctMoqyr.o:(.rodata._ZTIN5boost15program_options11typed_valueIdcEE[typeinfo for boost::program_options::typed_value<double, char>]+0x10): undefined reference to `typeinfo for boost::program_options::value_semantic_codecvt_helper<char>' /tmp/cctMoqyr.o:(.rodata._ZTIN5boost15program_options16validation_errorE[typeinfo for boost::program_options::validation_error]+0x8): undefined reference to `typeinfo for boost::program_options::error_with_option_name' /tmp/cctMoqyr.o: In function `boost::program_options::typed_value<double, char>::name() const': first.cpp:(.text._ZNK5boost15program_options11typed_valueIdcE4nameEv[boost::program_options::typed_value<double, char>::name() const]+0x1f): undefined reference to `boost::program_options::arg' /tmp/cctMoqyr.o: In function `void boost::program_options::validate<double, char>(boost::any&, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, double*, long)': first.cpp:(.text._ZN5boost15program_options8validateIdcEEvRNS_3anyERKSt6vectorISbIT0_St11char_traitsIS5_ESaIS5_EESaIS9_EEPT_l[void boost::program_options::validate<double, char>(boost::any&, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, double*, long)]+0xf): undefined reference to `boost::program_options::validators::check_first_occurrence(boost::any const&)' first.cpp:(.text._ZN5boost15program_options8validateIdcEEvRNS_3anyERKSt6vectorISbIT0_St11char_traitsIS5_ESaIS5_EESaIS9_EEPT_l[void boost::program_options::validate<double, char>(boost::any&, std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, double*, long)]+0x92): undefined reference to `boost::program_options::invalid_option_value::invalid_option_value(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)' /tmp/cctMoqyr.o: In function `boost::program_options::error_with_option_name::error_with_option_name(boost::program_options::error_with_option_name const&)': first.cpp:(.text._ZN5boost15program_options22error_with_option_nameC2ERKS1_[boost::program_options::error_with_option_name::error_with_option_name(boost::program_options::error_with_option_name const&)]+0x1f): undefined reference to `vtable for boost::program_options::error_with_option_name' /tmp/cctMoqyr.o:(.rodata._ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_15program_options16validation_errorEEEEE[vtable for boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::program_options::validation_error> >]+0x14): undefined reference to `boost::program_options::error_with_option_name::what() const' /tmp/cctMoqyr.o:(.rodata._ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_15program_options16validation_errorEEEEE[vtable for boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::program_options::validation_error> >]+0x1c): undefined reference to `boost::program_options::error_with_option_name::substitute_placeholders(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const' /tmp/cctMoqyr.o:(.rodata._ZTVN5boost16exception_detail19error_info_injectorINS_15program_options16validation_errorEEE[vtable for boost::exception_detail::error_info_injector<boost::program_options::validation_error>]+0x10): undefined reference to `boost::program_options::error_with_option_name::what() const' /tmp/cctMoqyr.o:(.rodata._ZTVN5boost16exception_detail19error_info_injectorINS_15program_options16validation_errorEEE[vtable for boost::exception_detail::error_info_injector<boost::program_options::validation_error>]+0x18): undefined reference to `boost::program_options::error_with_option_name::substitute_placeholders(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const' /tmp/cctMoqyr.o:(.rodata._ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_15program_options20invalid_option_valueEEEEE[vtable for boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::program_options::invalid_option_value> >]+0x14): undefined reference to `boost::program_options::error_with_option_name::what() const' /tmp/cctMoqyr.o:(.rodata._ZTVN5boost16exception_detail10clone_implINS0_19error_info_injectorINS_15program_options20invalid_option_valueEEEEE[vtable for boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::program_options::invalid_option_value> >]+0x1c): undefined reference to `boost::program_options::error_with_option_name::substitute_placeholders(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const' /tmp/cctMoqyr.o:(.rodata._ZTVN5boost16exception_detail19error_info_injectorINS_15program_options20invalid_option_valueEEE[vtable for boost::exception_detail::error_info_injector<boost::program_options::invalid_option_value>]+0x10): undefined reference to `boost::program_options::error_with_option_name::what() const' /tmp/cctMoqyr.o:(.rodata._ZTVN5boost16exception_detail19error_info_injectorINS_15program_options20invalid_option_valueEEE[vtable for boost::exception_detail::error_info_injector<boost::program_options::invalid_option_value>]+0x18): undefined reference to `boost::program_options::error_with_option_name::substitute_placeholders(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const' collect2: ld returned 1 exit status ---------------------- B. Clang error. I tried using clang instead with this command: clang first.cpp -o first -L/usr/local/lib/libboost_program_options.so and this is the error I get: In file included from first.cpp:9: In file included from /usr/local/include/boost/program_options.hpp:15: In file included from /usr/local/include/boost/program_options/options_description.hpp:13: In file included from /usr/local/include/boost/program_options/value_semantic.hpp:14: In file included from /usr/local/include/boost/lexical_cast.hpp:151: /usr/include/c++/4.4/cmath:518:14: error: cannot compile this builtin function yet return __builtin_isinf(__type(__f)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 diagnostic generated. ---------------------------- How can this be fixed?

2 1

[fusion] filter_if at run-time???
by Jeff Flinn 12 Mar '13

12 Mar '13

I've got a fusion set say: set<int, optional<double>, bool> s(...) I'd like to filter out empty optional<double> values when streaming out: std::cout << s; so for s(1, 2.0, true) ==> (1,2.0,true) and for s(3, optional<double>(), false) ==> (2,false) filter_if's predicate is an a Metafunction returning mpl::bool_ so it looks to me like this won't support run time? Is there another facility that would achieve the above? Thanks, Jeff

2 2

Compiled Boost with MPI
by julien.plu＠redaction-developpez.com 12 Mar '13

12 Mar '13

Hi, For my project I saw today that I needed MPI too. So I installed MPICH2 and Changed my < user-config.jam > file like that : import toolset : using ; using python : 2.7 : "C:/Python273" : "C:/Python273/include" : "C:/Python273/libs" ; using mpi : : <find-static-library>mpi <library-path>"C:/librairies/MPICH2-3.0.2/lib" <include>"C:/librairies/MPICH2-3.0.2/include" : "\"C:\\librairies\\MPICH2-3.0.2\\bin\\mpiexec\"" ; So I compile Boost with this command line : b2 toolset=gcc --j4 --layout=system release --prefix=C:\librairies\boost-1.53.0 --user-config=user-config.jam install And the error is in the out.txt file in attachment. Anyone know what's happenned ? Thanks in advance. Julien.

5 14

[geometry] Documentation error regarding geographical coordinate system?
by Jason 12 Mar '13

12 Mar '13

In the "Quick Start" section of the Boost.Geometry documentation, there is the following note under the "Non-Cartesian" header: Boost.Geometry supports a geographical coordinate system, but that is in an extension and not released in the current Boost release. boost::geometry::cs::geographic does seem to be in the v1.53 release. Is this just a remnant from legacy documentation, or are there some gotchas to be expected with the geographic coordinate system support? Jason -- View this message in context: http://boost.2283326.n4.nabble.com/geometry-Documentation-error-regarding-g… Sent from the Boost - Users mailing list archive at Nabble.com.

1 0

Meeting C++ 2013 - Call for Papers
by Jens Weller 12 Mar '13

12 Mar '13

Hello C++ & boost Community! Today, the 2nd Edition of the Meeting C++ conference has been announced! We will meet in Düsseldorf again at the 2nd November Weekend for two days full of C++! Call for Papers: http://www.meetingcpp.com/index.php/newsreader/items/call-for-papers-124.ht… Announcement with further Details on the conference: http://www.meetingcpp.com/index.php/newsreader/items/meeting-cpp-2013-annou… Talks about boost, C++11/14 are very welcome to the conference! kind regards, Jens Weller

1 0

Boost.Interprocess accessing an unordered_map in shared memory.
by lazylabs＠gmail.com 12 Mar '13

12 Mar '13

Hi, I am trying to create a unordered_map in shared memory using Boost Interprocess library. Here, is the code, which I'm trying to use (taking examples from Boost Interprocess documentation): #include <boost/interprocess/managed_shared_memory.hpp> #include <boost/interprocess/allocators/allocator.hpp> #include <functional> #include <boost/functional/hash.hpp> #include <boost/unordered_map.hpp> #include <iostream> #include <string> #include <boost/interprocess/containers/string.hpp> namespace bipc = boost::interprocess; typedef bipc::allocator<char, bipc::managed_shared_memory::segment_manager> CharAllocator; typedef bipc::basic_string<char, std::char_traits<char>, CharAllocator> ShmemString; struct Person { int age; ShmemString name; double salary; Person(int i, double sal, const char* s, const char_allocator& a) : age(i), name(s, a), salary(sal) { } void print() {} } typedef ShmemString KeyType; typedef Person MappedType; typedef std::pair< KeyType, MappedType > MapPersonType; typedef bipc::allocator< MapPersonType, bipc::managed_shared_memory::segment_manager > ShMemAllocator; typedef boost::unordered_map< KeyType, MappedType, boost::hash<KeyType>, std::equal_to<KeyType>, ShMemAllocator > PersonMap; In the main reader program, I create a map in the shared memory and I insert an object in this map: int main() { bipc::managed_shared_memory segment(bipc::create_only, "MySharedMemory", 65536); PersonMap *persons = segment.construct<PersonMap>("MyHashMap") ( 3, boost::hash<ShmemString>(), std::equal_to<ShmemString>() , segment.get_allocator<MapPersonType>()); char_allocator alloc(segment.get_allocator<char>()); Person p1(20, 10000, "ABC", alloc); persons->insert(MapPersonType(ShmemString("Person1", alloc), p1)); } However, when I am trying to access the map in the reader program, I need to use a syntax like persons->at(ShmemString("H", segment.get_allocator<char>())).print(); However, I would prefer to do this with a std::string, which results in compilation errors: persons->at(std::string("H")).print(); Is it possible to write the above statement, i.e. accessing the map allocated in shared memory with std::string? Thanks.

3 4

Using SSL
by ustulation 11 Mar '13

11 Mar '13

Hello. this will be the first time i'll be writing an SSL and am using boost::asio::ssl. I've gone through the articles over the net and somewhat understand how ssl works. I've created 3 files at server end as of now: privateKey.pem, unsignedCertificate.csr and signedCertificate.pem. I used the server's privateKey.pem to sign the certificate (hence the generated 3rd file). Hence Server itself is a Certification Authority in this case (CA). Now what i understand from theory is: <1> During handshake client will request server's certificate. <2> on reception the client must verify if the ceritficate is signed by the mentioned trusted Certification Authority (CA) in the certificate. Since CA will have used a private key to sign the certificate client will need CA's public key stored somewhere on its machine. Use that public key file to verify that mentioned CA did indeed sign it. <3> if it is, then verify the certificate as a whole. In my case, the server had used it's own private key to self-sign the certificate. questions: <1> if CA was one of the trusted third parties the O.S would have stored it's public key in default locations. In that case i guess all i needed was ssl::context::set_default_verify_paths() and boost would have used all files there to match against the CA and use its public key. In this case however i need Server's public key file. Am i right? How do i get that (server's public key)? Do i use one of the 3 files above at the client end too? Is it load_verify_file("..") that i need to call pointing to server's public key? <2> context::set_verify_callback : does this get called during handshake? The handler must return bool. Suppose i return false, who will check it and what will it do? What i am guessing is: handshake -> blocks and runs a pre-verification test -> calls the supplied handler -> if handler returns true, handshake is successful otherwise either the handshake throws or fills the error code with non-zero value depending on what flavour of handshake(...) was called. Is this correct? <3> if i use ssl::rfc2818_verification("hostname") as verify_callback handler, what do i pass in place of hostname if there is no hostname (ie., i only know the server ip address). <4> do i have to use chain of files in this case? Because the server would just send one certificate file - the one that is signed right? -- View this message in context: http://boost.2283326.n4.nabble.com/Using-SSL-tp4644012.html Sent from the Boost - Users mailing list archive at Nabble.com.

1 0

[graph][parallel] Problem distributed property map synchronization
by bminano 11 Mar '13

11 Mar '13

Hello, I need help. I have a distributed graph with a distributed property map for an edge value. The problem is that the synchronize procedure does not synchronize my ghost edges values. I have a loop that reads from the property, synchronizes, modifies its value and synchronizes it. What I see is that the value is not being synchronized for the ghost edges. for (int t = 0; t < 2; t++) { myfile<<rank<<":Time "<<t<<endl; BGL_FORALL_VERTICES(v, g, Graph) { for (boost::tie(ei_i,edge_end_i) = in_edges(v, g); ei_i != edge_end_i; ++ei_i) { remote_key_e k(rank, *ei_i); myfile<<"value "<<d_index[source(*ei_i, g)]<<" -> "<<d_index[target(*ei_i, g)]<<" valor "<<get(d_ecash, k)<<endl; } } synchronize(d_ecash); BGL_FORALL_VERTICES(v, g, Graph) { for (boost::tie(ei,edge_end) = out_edges(v, g); ei != edge_end; ++ei) { remote_key_e k(rank, *ei); put(d_ecash, k, t + 1); } } synchronize(d_ecash); } Could anyone tell me what I am doing wrong? I attach the full code if someone want to look at them. <nabble_a href="sync.cpp">sync.cpp -- View this message in context: http://boost.2283326.n4.nabble.com/graph-parallel-Problem-distributed-prope… Sent from the Boost - Users mailing list archive at Nabble.com.

3 3

[Graph][parallel] Scale-free graph generator without self-loops
by bminano 11 Mar '13

11 Mar '13

Hello, Does anyone knows if there is possible to generate a scale-free graph that does not generate self-loops (edges with the same vertex for source and target)? I am using the unique_rmat_iterator, but it generates some self-loops. I could remove them, but for the graph remains inconsistent because of a bug. I will apreciate your help. -- View this message in context: http://boost.2283326.n4.nabble.com/Graph-parallel-Scale-free-graph-generato… Sent from the Boost - Users mailing list archive at Nabble.com.

3 5

can't get first example in boost tutorial to work
by 7stud 11 Mar '13

11 Mar '13

I'm trying to install boost on mac osx 10.4.7. I followed the tutorial "Getting Started on Unix Variants" found here: http://www.boost.org/doc/libs/1_35_0/ more/getting_started/unix-variants.html Following the instructions in the tutorial, I installed boost in /usr/local as instructed, so my directory structure is: /usr/local/boost_1_34_1/boost But when I run the first example in the tutorial: #include <boost/lambda/lambda.hpp> #include <iostream> #include <iterator> #include <algorithm> int main() { using namespace boost::lambda; typedef std::istream_iterator<int> in; std::for_each(in(std::cin), in(), std::cout << (_1 * 3) << " " ); } I get the error(among others): error: boost/lambda/lambda.hpp: No such file or directory If I change the include path to: #include </user/local/boost_1_34_1/boost/lambda/lambda.hpp> I get the error(among others): error: boost/lambda/core.hpp: No such file or directory But core.hpp is in the lambda directory: /usr/local/boost_1_34_1/boost/lambda$ ls algorithm.hpp control_structures.hpp lambda.hpp bind.hpp core.hpp loops.hpp casts.hpp detail numeric.hpp closures.hpp exceptions.hpp switch.hpp construct.hpp if.hpp I'm using the Xcode 2.4 IDE to run my C++ programs. I also tried to execute the program from the command line with the original include path: #include <boost/lambda/lambda.hpp> but I get the same error: ~/2testing/dir1$ g++ prog1.cpp prog1.cpp:1:35: error: boost/lambda/lambda.hpp: No such file or directory prog1.cpp: In function 'int main()': prog1.cpp:8: error: 'boost' has not been declared prog1.cpp:8: error: expected namespace-name before ';' token prog1.cpp:8: error: '<type error>' is not a namespace prog1.cpp:11: error: '_1' was not declared in this scope I get the same errors again with the full include path: #include </user/local/boost_1_34_1/boost/lambda/lambda.hpp> $ g++ prog1.cpp In file included from prog1.cpp:1: /usr/local/boost_1_34_1/boost/lambda/lambda.hpp:14:33: error: boost/lambda/core.hpp: No such file or directory /usr/local/boost_1_34_1/boost/lambda/lambda.hpp:21:52: error: boost/lambda/detail/operator_actions.hpp: No such file or directory /usr/local/boost_1_34_1/boost/lambda/lambda.hpp:22:61: error: boost/lambda/detail/operator_lambda_func_base.hpp: No such file or directory /usr/local/boost_1_34_1/boost/lambda/lambda.hpp:23:63: error: boost/lambda/detail/operator_return_type_traits.hpp: No such file or directory /usr/local/boost_1_34_1/boost/lambda/lambda.hpp:26:45: error: boost/lambda/detail/operators.hpp: No such file or directory /usr/local/boost_1_34_1/boost/lambda/lambda.hpp:30:46: error: boost/lambda/detail/member_ptr.hpp: No such file or directory prog1.cpp: In function 'int main()': prog1.cpp:8: error: 'boost' has not been declared prog1.cpp:8: error: expected namespace-name before ';' token prog1.cpp:8: error: '<type error>' is not a namespace prog1.cpp:11: error: '_1' was not declared in this scope What path should I be using? Or, should I set an environment variable somewhere?

6 16

adjacency matrix subgraph enumeration
by headupinclouds 09 Mar '13

09 Mar '13

What is the best way in boost to enumerate all connected subgraphs of an adjacency matrix? I know in advance that all nodes of the graph are connected and that it is cyclic. For the following graph: (0 <-> 1) (1 <-> 2) (2 <-> 3) (3 <-> 0) I want to enumerate the node list of all unique connected subgraphs: (0, 1) (0, 1, 2) (0, 1, 2, 3) (1, 2) (1, 2, 3) (2, 3) (0, 3) (0, 3, 2) -- View this message in context: http://boost.2283326.n4.nabble.com/adjacency-matrix-subgraph-enumeration-tp… Sent from the Boost - Users mailing list archive at Nabble.com.

1 0

is_foo_type naming rule
by Niitsuma Hirotaka 09 Mar '13

09 Mar '13

There are two type is_foo_type functor For example is_double can be --------- template<typename T> struct is_double_template : boost::is_same<T,double> {}; --------- or --------- struct is_double_runtime { template<typename T> bool operator()(T x){return false;} bool operator()(double x){return true;} }; --------- Are there any standard naming rule distinguish these functor? is_foo_runtime is_foo_compiletime ? The compile-time functor can convert to runtime factor using : --------- template<typename IsTemplateMplLambda> struct is_templated_type_to_runtime { typedef struct is_templated_type_runtime { template<typename T> bool operator()(T) { return boost::mpl::apply<IsTemplateMplLambda,T>::type::value; } } type; }; --------- usage --------- typedef boost::mpl::lambda<is_double_template<boost::mpl::_1 > >::type is_double_mpl_lambda; double x=1.1; int i=2; is_templated_type_to_runtime<is_double_mpl_lambda>::type is_double_runtime_object; std::cout << is_double_runtime_object(x) << std::endl; std::cout << is_double_runtime_object(i) << std::endl; ---------

3 3

newbie needs help with a linker problem
by Phil Huffman 09 Mar '13

09 Mar '13

Hello, I just installed Boost and GMP on my Mac, using all defaults. I want to use GMP via Boost, but there is a problem with the linker. I'm sure that clang is getting a bit lost looking for GMP's object modules. Any help will be gratefully accepted. Thanks. When I compile the below program: #include <boost/multiprecision/gmp.hpp> using namespace boost::multiprecision; int main() { mpz_int v = 1; for (unsigned i = 1; i <= 1000; ++i) { v *= i; } std::cout << "1000! = " << v << std::endl; // prints 1000! return 0; } using this command: c++ -I /usr/local/boost_1_53_0 mpz1.cpp -o mpz1 -v I get this: Apple clang version 4.1 (tags/Apple/clang-421.11.66) (based on LLVM 3.1svn) Target: x86_64-apple-darwin12.2.0 Thread model: posix "/usr/bin/clang" -cc1 -triple x86_64-apple-macosx10.8.0 -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -main-file-name mpz1.cpp -pic-level 1 -mdisable-fp-elim -relaxed-aliasing -masm-verbose -munwind-tables -target-cpu core2 -target-linker-version 134.9 -v -resource-dir /usr/bin/../lib/clang/4.1 -I /usr/local/boost_1_53_0 -fmodule-cache-path /var/folders/hj/zc5pjqjd6gxgq2sw77xghkyh0000gn/T/clang-module-cache -fdeprecated-macro -fdebug-compilation-dir /Users/56phil/Dev/boostTest -ferror-limit 19 -fmessage-length 272 -stack-protector 1 -mstackrealign -fblocks -fobjc-runtime-has-arc -fobjc-runtime-has-weak -fobjc-dispatch-method=mixed -fobjc-default-synthesize-properties -fcxx-exceptions -fexceptions -fdiagnostics-show-option -fcolor-diagnostics -o /var/folders/hj/zc5pjqjd6gxgq2sw77xghkyh0000gn/T/mpz1-KE6NKq.o -x c++ mpz1.cpp clang -cc1 version 4.1 based upon LLVM 3.1svn default target x86_64-apple-darwin12.2.0 ignoring nonexistent directory "/usr/include/c++/4.2.1/i686-apple-darwin10/x86_64" ignoring nonexistent directory "/usr/include/c++/4.0.0" ignoring nonexistent directory "/usr/include/c++/4.0.0/i686-apple-darwin8/" ignoring nonexistent directory "/usr/include/c++/4.0.0/backward" #include "..." search starts here: #include <...> search starts here: /usr/local/boost_1_53_0 /usr/include/c++/4.2.1 /usr/include/c++/4.2.1/backward /usr/local/include /usr/bin/../lib/clang/4.1/include /usr/include /System/Library/Frameworks (framework directory) /Library/Frameworks (framework directory) End of search list. "/usr/bin/ld" -demangle -dynamic -arch x86_64 -macosx_version_min 10.8.0 -o mpz1 /var/folders/hj/zc5pjqjd6gxgq2sw77xghkyh0000gn/T/mpz1-KE6NKq.o -lstdc++ -lSystem /usr/bin/../lib/clang/4.1/lib/darwin/libclang_rt.osx.a Undefined symbols for architecture x86_64: "___gmp_get_memory_functions", referenced from: boost::multiprecision::backends::gmp_int::str(long, std::_Ios_Fmtflags) const in mpz1-KE6NKq.o "___gmpz_clear", referenced from: boost::multiprecision::backends::gmp_int::~gmp_int() in mpz1-KE6NKq.o "___gmpz_get_str", referenced from: boost::multiprecision::backends::gmp_int::str(long, std::_Ios_Fmtflags) const in mpz1-KE6NKq.o "___gmpz_init", referenced from: boost::multiprecision::backends::gmp_int::operator=(long) in mpz1-KE6NKq.o boost::multiprecision::backends::gmp_int::gmp_int() in mpz1-KE6NKq.o "___gmpz_mul_ui", referenced from: boost::multiprecision::backends::eval_multiply(boost::multiprecision::backends::gmp_int&, unsigned long) in mpz1-KE6NKq.o "___gmpz_set_si", referenced from: boost::multiprecision::backends::gmp_int::operator=(long) in mpz1-KE6NKq.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

2 1

building with iostreams and a non-standard zlib location
by James Amundson 09 Mar '13

09 Mar '13

Hi, I'm trying to do a bjam build of boost packages including iostreams. I have zlib installed under /unusual/location ./bjam include=/unusual/location/include install fails because it cannot find -lz. Obviously, I need to specify that libz is in /unusual/location/lib, but I don't see how to do that. I realize this seems obvious. Which part of the documentation am I missing? Thanks, Jim Amundson

4 3

VS2012 C4503 warning (decorated name length exceeded, name was truncated) with boost 1.52
by legalize+jeeves＠mail.xmission.com 08 Mar '13

08 Mar '13

[Please do not mail me a copy of your followup] I'm using boost 1.52. If you see this thread on stack overflow: <http://stackoverflow.com/questions/9669071/warning-c4503-when-using-pragma-…> You'll see a comment down at the bottom where someone has increased the warning level for their project and they are getting tons of these C4503 warnings when using boost includes. I have verified on my project that if I don't change the warning level and don't specifically disable this warning project-wide, then including using boost in my project does not generate the warning. However, if I increase the warning level beyond the default, to 3 in my case whereas the poster on stack overflow had used 4, then I get the warning. I, like the commenter on stack overflow, would like to know if there's a boost-friendly way to tell boost to disable the warning for boost headers where the boost authors have decided it's innocuous, while still retaining the high warning setting for my own code. Any suggestions? Thanks in advance. -- "The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline> The Computer Graphics Museum <http://computergraphicsmuseum.org> The Terminals Wiki <http://terminals.classiccmp.org> Legalize Adulthood! (my blog) <http://legalizeadulthood.wordpress.com>

2 2

Scale-free networks generation
by davidrey123 08 Mar '13

08 Mar '13

Hello, I would to use Boost librairies to generate scale-free networks and I am not sure what is the best approach. I am currently using the PLOD generator, but the graphs generated are generally multigraphs, that is, graphs with multiple edges between two nodes. Although I would like to generate graphs with bidirectionnal edges between nodes, I also would like to bound the maximum number of possible edges between a pair of nodes to 2. In other words, if edges (i,j) and (j,i) are generated between nodes i and j, I do not want any additional edge between those nodes to be generated. Hence, I would like to know; 1-Is it possible to generate such graphs using the PLOD generator? If it is, do I need to remove "multi-edges" after the graph is generated or is there a smarter way to do so? 2-If using the PLOD generator is not the best option, is there any other random graph generator in Boost that can be adapted to design scale-free networks? In particular, is there a graph generator implementing the Barabasi-Albert model (I have looked up the forum for an answer to that question and it seems that the answer is "no", but things may have changed since)/ 3-I read somewhere that Compressed Sparse Row (CSR) graphs could be used to represent scale-free networks, is there a way to use the corresponding Boost class to do so? Thank you, -David -- View this message in context: http://boost.2283326.n4.nabble.com/Scale-free-networks-generation-tp4643888… Sent from the Boost - Users mailing list archive at Nabble.com.

3 4

[type traits / MPL] check whether a class has a certain member function
by Stefan Strasser 08 Mar '13

08 Mar '13

Hi, I'm looking for a boost functionality to determine whether a given type has a member function of a given name (or name + signature). this seems to be possible using SFINAE, but all I can find is BOOST_MPL_HAS_XXX_TRAIT_DEF which only works for nested types, not functions. I could of course implement it myself using SFINAE but BOOST_MPL_HAS_XXX_TRAIT_DEF has a lot of compiler bug workarounds it seems, so I guess this will cause problems. Is there such a functionality in boost? I want to use it to determine the defaults of a traits class, similar to C++11 pointer_traits::difference_type. But the determining factor for the default is a function in my case, not a type. Thanks

4 6

Using BOOST_*_EQUAL on bit-fields?
by Chris Cleeland 07 Mar '13

07 Mar '13

I'm using the Boost Unit Test Framework and have a struct with bitfields declared in it. When I compile a unit test with code like this StructWithBitfields mystruct; StructWithBitfields otherstruct; BOOST_CHECK_EQUAL(mystruct.bitfield, otherstruct.bitfield); I get a compiler errors error: non-const reference cannot bind to bit-field 'bitfield' referring to both arguments to the macro. Is there a preferred way for comparing bitfield values via unit test macros? -- Chris Cleeland

1 0

Boost.Function compile error
by gast128 07 Mar '13

07 Mar '13

Dear all, i got a compilation error with vstudio 2010 and Boost.Function: 1) pass functor in constructor 2) pass functor as assignment 3) use Boost.Ref 4) temporary function void foo() { std::identity<int> bla; boost::function<int (int)> fc(bla); boost::function<int (int)> fc2 = bla; boost::function<int (int)> fc(boost::ref(bla)); boost::function<int (int)>(bla); //<-- } first 3 are ok, but the last one vstudio sees this as redefintion of bla of type 'boost::function<int (int)>. What (and why) do I wrong or should use an explicit cast in the last case?

3 8

Re: [Boost-users] asio: async ops in multithreading environment
by Marat Abrarov 06 Mar '13

06 Mar '13

> 1) One thread issues scatter-gather boost::asio::async_write() for > boost::array<boost::asio::const_buffer, 2> on socket A. > 2) Another thread closes socket A after that. > 3) Meantime (simultaneously with 2), first buffer write is completed and > one of the threads running io_service::run() starts to execute second part > of async_write from 1). > > The problem is: second write which is issued internally by boost cannot be > protected by the same mutex which is used for protected access to the > socket in my code. At first, RTFM: 1. http://www.boost.org/doc/libs/1_53_0/doc/html/boost_asio/reference/Handler.h tml ~~~~~~~~~~~~~~ asio_handler_invoke(f, &h); ~~~~~~~~~~~~~~ 2. http://www.boost.org/doc/libs/1_53_0/doc/html/boost_asio/overview/core/stran ds.html ~~~~~~~~~~~~~~ In the case of composed asynchronous operations, such as async_read() or async_read_until(), if a completion handler goes through a strand, then all intermediate handlers should also go through the same strand. This is needed to ensure thread safe access for any objects that are shared between the caller and the composed operation (in the case of async_read() it's the socket, which the caller can close() to cancel the operation). This is done by having hook functions for all intermediate handlers which forward the calls to the customisable hook associated with the final handler: ~~~~~~~~~~~~~~ Than google some more: 3. https://github.com/boostcon/2011_presentations/raw/master/mon/thinking_async hronously.pdf See template <class Handler> struct mutex_wrapper at page 95. 4. http://asio-samples.blogspot.ru/2011/06/design-journeys-with-asio.html Sorry, it's in Russian. Regards, Marat Abrarov.

1 0

icu libraries renamed in icu-50-*
by koala01 06 Mar '13

06 Mar '13

Hello, I just have compiled a personnal build of mingw-w64 (gcc 4.8) and different extern libraries, as icu-50.1.2 (the last release of that library) on windows vista When trying to compile boost (1-53-0), it appears that icu is not found, due to following name changes in icu: * icudata library is now named icudt * icui18n library is now named icuin (i dont know if those change are recent or not :S) We can, of course, provide a copy of those libraries with the correct / needed names, but shouldn't it better to make a conditionnal choice on the icu version to know if we have to use one or other name, to ensure that icu would be correctly detected ? I expect that such test should simply take place in a jamfile or in another, am i wrong?

3 2

1.53, Bjam fails when adding arguments [Beginner]
by wespaugh 06 Mar '13

06 Mar '13

I'm trying to build 1.53 for use with an android platform, using some configuration code provided kindly provided by one of the community. (Android shouldn't be relevant to the problem, but it seemed noteworthy). My user-config.jam is: import os ; if [ os.name ] = CYGWIN || [ os.name ] = NT { androidPlatform = windows ; } androidNDKRoot = /cygdrive/c/Android/android-ndk-r8d ; using gcc:android:$(androidNDKRoot)/toolchains/arm-linux-androideabi/prebuilt/$(androidPlatform)/bin/arm-linux-androideabi-g++ <compileflags>--sysroot=$(androidNDKRoot)/platforms/android-8/arch-arm/ <compileflags>-I$(androidNDKRoot)/sources/cxx-stl/gnu-libstdc++/4.7/include <compileflags>-I$(androidNDKRoot)/sources/cxx-stl/gnu-libstdc++/4.7/libs/armeabi/include <archiver>$(androidNDKRoot)/toolchains/arm-linux-androideabi-4.7/prebuilt/$(androidPlatform)/bin/arm-linux-androideabi/ar <ranlib>$(androidNDKRoot)/toolchains/arm-linux-androideabi-4.7/prebuilt/$(androidPlatform)/bin/arm-linux-androideabi-ranlib ; And I am trying to build with the following command: b2 release --with-serialization --with-thread --with-date_time --with-system --with-filesystem --layout=system threading=multi link=static runtime-link=static toolset=gcc-android target-os=linux threadapi=pthread stage When I try to run, however, I get .../user-config.jam:109: in modules.load *** argument error * rule using ( toolset-module : * ) * called with: ( gcc:android:/cygdrive/c/Android/android-ndk-r8d/toolchains/arm-linux-androideabi/prebuilt/windows/bin/arm-linux-androideabi <compileflags>--sysroot=/cygdrive/c...{Rest of my compiler flags go here} * extra argument <compileflags>--sysroot=/cygdrive/c/Android/android-ndk-r8d/...{Rest of my compiler flags go here} /{...}/build/project.jam:886: see definition of rule 'using' being called /{...}/build-system.jam:257: in load-config /{...}/build-system.jam:399: in load-configuration-files /{...}/build-system.jam:555: in load /{...}/kernel/modules.jam:284: in import /{...}/kernel/bootstrap.jam:142: in boost-build /{...}/boost-build.jam:8: in module scope >From what I can tell, it doesn't like something about how my compile flags are passed in. I found some documentation on boost.org suggesting that the proper way to define them is like this: compileflags="--sysroot=/cygdrive/c/Android/{...}/ -I$(androidNDKRoot)/toolchains/{...} etc" But that gave me the same error. There's a strong chance that this is in TFM somewhere I just need to R. If so, I apologize, because I cannot find the manual. I would greatly appreciate any assistance in finding where to learn what I need to know about these config files. I would even more greatly appreciate some assistance with this specific problem. -- View this message in context: http://boost.2283326.n4.nabble.com/1-53-Bjam-fails-when-adding-arguments-Be… Sent from the Boost - Users mailing list archive at Nabble.com.

2 3

boost::filesystem create directory fail
by albert 06 Mar '13

06 Mar '13

I use the code below to create directories, but it fails. What is the correct way to do it? Thanks in advance. try { string logdirname("./notexistdir/logdir/"); boost::filesystem::path logdir(logdirname.c_str()); boost::filesystem::file_status s = boost::filesystem::status(logdir); if( !boost::filesystem::is_directory(s) ) { cout<< "not a directory, mkdir" <<endl; if(boost::filesystem::create_directory(logdir)) { cout<<"directory create ok" <<endl; } else { cout<<"directory create fail" <<endl; } } else { cout<<"is a directory" <<endl; } } catch(exception& ex) { cout<< "exception caught[" << ex.what() <<"]" <<endl; }

2 1

asio: async ops in multithreading environment
by Max Dmitrichenko 06 Mar '13

06 Mar '13

Hi! I have strange crashes of my application that uses async ops in multiple threads. Before I describe my vision of the problem I point the following: 1) I'm aware that shared access to the same socket from multiple threads is unsafe. 2) All operations which my code issues on the same socket are made under mutex. As far as I understand, the following happens: 1) One thread issues scatter-gather boost::asio::async_write() for boost::array<boost::asio::const_buffer, 2> on socket A. 2) Another thread closes socket A after that. 3) Meantime (simultaneously with 2), first buffer write is completed and one of the threads running io_service::run() starts to execute second part of async_write from 1). In this place application segfaults: #0 0x00007fa3a3a2c4eb in boost::asio::detail::epoll_reactor::start_op (this=0x19c3410, op_type=1, descriptor=27, descriptor_data=@0x7f9dfc013260, op=0x7f9dfc2d2130, allow_speculative=true) at boost-1_51/boost/asio/detail/impl/epoll_reactor.ipp:219 #1 0x00007fa3a3a2bf63 in boost::asio::detail::reactive_socket_service_base::start_op (this=0x19c4338, impl=..., op_type=1, op=0x7f9dfc2d2130, is_non_blocking=true, noop=false) at boost-1_51/boost/asio/detail/impl/reactive_socket_service_base.ipp:211 #2 0x00007fa3a3af4ec5 in boost::asio::detail::reactive_socket_service_base::async_send (this=0x19c4338, impl=..., buffers=..., flags=0, handler=...) at boost-1_51/boost/asio/detail/reactive_socket_service_base.hpp:212 #3 0x00007fa3a3af90bf in boost::asio::stream_socket_service<boost::asio::ip::tcp>::async_send (this=0x19c4310, impl=..., buffers=..., flags=0, handler=...) at boost-1_51/boost/asio/stream_socket_service.hpp:298 #4 0x00007fa3a3b05992 in boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >::async_write_some (this=0x7f9dfc013250, buffers=..., handler=...) at boost-1_51/boost/asio/basic_stream_socket.hpp:676 because descriptor_data equals null-pointer here. The problem is: second write which is issued internally by boost cannot be protected by the same mutex which is used for protected access to the socket in my code. So, the question is: how can I safely close the socket? -- Max

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Problem with the parallel graph
by Yeni Lora 06 Mar '13

06 Mar '13

I am student of Computer Science in Universidad de Oriente from Cuba, and I have a problem with the parallel graph, when I am adding edge betwen two procesors and one of them change any property of my edge, the other processor not update the property . for example my code is : #include "mpi.h" #include <boost/config.hpp> #include <boost/graph/use_mpi.hpp> #include <boost/graph/distributed/mpi_process_group.hpp> #include <boost/graph/distributed/adjacency_list.hpp> #include <boost/property_map/parallel/distributed_property_map.hpp> #include <boost/serialization/list.hpp> #include <list> using namespace std; //===============================Vertex================================ struct Vertex{ int id; // Serialization support is required! template<typename Archiver> void serialize(Archiver& ar, const unsigned int ) { ar & id ; } Vertex(int id = 0): id(id){} }; //===============================Edge================================ struct Edge{ int type; Edge( int type = 0): type(type){ } // Serialization support is required! template<typename Archiver> void serialize(Archiver& ar,const unsigned int ) { ar & type; } }; using namespace boost; using boost::graph::distributed::mpi_process_group; typedef adjacency_list < listS, distributedS<mpi_process_group, listS>, undirectedS, Vertex, Edge > Graph; typedef typename Graph::edge_descriptor edge_descriptor; typedef typename Graph::vertex_descriptor vertex_descriptor; int main (int argc, char ** argv){ boost::mpi::environment env(argc,argv); mpi::communicator world; Graph g; vertex_descriptor vi,vj; property_map<Graph, int Edge::*>::type type1 = get(&Edge::type, g); if (g.processor()==0) vi = add_vertex(Vertex(1),g); if (g.processor()==1) vj = add_vertex(Vertex(2),g); broadcast(world, vj, 1); broadcast(world, vi, 0); if (g.processor()==0){ pair<edge_descriptor,bool> p = add_edge(vi, vj, Edge(1), g); std::cout<<"Process "<<g.processor()<<std::endl; std::cout<<"Process owner of edge "<<owner(p.first)<<std::endl; std::cout<<"Property type of edge :"<<get(type1,p.first)<<std::endl; } synchronize(g); if (g.processor()==1){ pair<edge_descriptor,bool> p = edge(vi, vj, g); if(p.second){ std::cout<<"\nProcess "<<g.processor()<<std::endl; std::cout<<"Process owner of edge "<<owner(p.first)<<std::endl; put(type1,p.first,3); std::cout<<"Change property type of edge :"<<get(type1,p.first)<<std::endl; } } synchronize(g); if (g.processor()==0){ pair<edge_descriptor,bool> p = edge(vi, vj, g); std::cout<<"\nProcess "<<g.processor()<<std::endl; std::cout<<"Property type of edge :"<<get(type1,p.first)<<std::endl; } return 0; } The output: Process 0 Process owner of edge 0 Property type of edge :1 Process 1 Process owner of edge 1 Change property type of edge :3 Process 0 Property type of edge :1 What can I do for resolve the problem?

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boost.MSM: No member function 'process_any_event' declared
by RaRi 05 Mar '13

05 Mar '13

Hi Christophe, In case a class is derived from the msm::back::state_machine class and used with the favor_compile_time policy I get the following error: *No member function 'process_any_event' declared* Please consider the following code snippets to get more details: *// MasterStateMachine.hpp* struct Master_: mgp_state_machine_def<Master_> { // ... } *class MasterStateMachine : public msm::back::state_machine<Master_, msm::back::favor_compile_time>{ public: MasterStateMachine () { // some stufff }; } *// MasterStateMachine.cpp* #include "MasterStateMachine.hpp" BOOST_MSM_BACK_GENERATE_PROCESS_EVENT(MasterStateMachine) Why does the compiler complains although the class MasterStateMachine inherits the "process_any_event" method from the *msm::back::state_machine<Master_, msm::back::favor_compile_time>* back-end? The point of matter is the *BOOST_MSM_BACK_GENERATE_PROCESS_EVENT(MasterStateMachine)* macro. In case it is uncomment, everythin works fine, but unfortunately without the support of the favor_compile_time policy. Background: I need to derive the class *MasterStateMachine * from the the mentioned back-end as singleton semantic has to be added to the *MasterStateMachine * class. *Not using* the favor_compile_policy is not a option! I have already tried to overload the *process_any_event* method in the derived "MasterStateMachine" class to comply with the compilers needs: class MasterStateMachine : public msm::back::state_machine<Master_, msm::back::favor_compile_time>{ private: static MasterStateMachine *m_Instance; // Constructor to avoid instantiation from the outside MasterStateMachine() {}; // Constructor to avoid copy-constructing MasterStateMachine(const MasterStateMachine&) {} // Constructor to avoid assignation MasterStateMachine& operator = (const MasterStateMachine&) { return *this; } ~MasterStateMachine() {}; public: static MasterStateMachine* getInstance(); static void release(); msm::back::HandledEnum process_any_event(const boost::any & evt) { return this->process_any_event(evt); } };* Unfortunately the error remains! Does anybody ;) have a clue? Thanks in advanced! Regards, Rafael -- View this message in context: http://boost.2283326.n4.nabble.com/boost-MSM-No-member-function-process-any… Sent from the Boost - Users mailing list archive at Nabble.com.

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[thread] Using lambda with unique_future
by Christian Henning 05 Mar '13

05 Mar '13

Hi all, I'm toying around with futures and I'm stumbling with the Visual Studio 2010 compiler. The following doesn't compile: #include <iostream> #include <boost/thread/future.hpp> int main() { boost::unique_future<int> the_answer = boost::async( [] () ->int { return 42; } ); std::cout << the_answer.get() << std::endl; return 0; } the error is: 1>c:\gil_contributions\sdl_test\async_test.cpp(9): error C2440: 'initializing' : cannot convert from 'boost::unique_future<R>' to 'boost::unique_future<R>' 1> with 1> [ 1> R=void 1> ] 1> and 1> [ 1> R=int 1> ] 1> No constructor could take the source type, or constructor overload resolution was ambiguous clang works just fine: http://liveworkspace.org/code/1gOYwa$2 Is this a compiler error or am I doing something wrong? Thanks, Christian

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Flyweights: compute a hash from them
by Akim Demaille 05 Mar '13

05 Mar '13

Hi all, My parser is building string_t = flyweight<std::string> for identifiers, and it works very well. Now, I would like to make an unordered_map <string_t, foo_t>, but I have to define a hash function for string_t. I can do it but since the whole point of flyweight is to make unique instances, it would be a pity to hash the value. So I hash the address of the result of get(). Is this ok? So far everything is fine, but I might have missed something. In particular, I don't understand why their is no standard hash function defined for flyweights. Thanks in advance!

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Re: [Boost-users] [parallel graph] error building parallel BGL
by The Maschine 05 Mar '13

05 Mar '13

*Hi,* * * *Yes it compiled in xcode, no problems.* * * *Process 0 on power-zmkl.local* *pi is approximately 3.1416009869231254, Error is 0.0000083333333323* *wall clock time = 0.000034* * * *When I try to use the same setup with the:* * * // Example usage of breadth_first_search algorithm For the lib/parallel_graph/exmaples I again have this error: /usr/local/include/boost/graph/distributed/mpi_process_group.hpp:419:28: No viable conversion from 'shared_ptr<boost::graph::distributed::mpi_process_group::impl>' to 'bool' On a linux (mint) that I have, everything compiled without problems. Any workaround for the Mac? Thanks, Tasos

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Re: [Boost-users] build error boost 1.53.0
by Dev Guy 05 Mar '13

05 Mar '13

After reading another post for build errors, I got the hint from it to install python-dev and everything now builds without errors. To install the missing python headers on Ubuntu, just type: sudo apt-get install python-dev On Mon, Mar 4, 2013 at 9:12 PM, Dev Guy <devguy.ca(a)gmail.com> wrote: > I attached my build.log, however here are the type of build errors I am > getting: > > gcc.compile.c++ > bin.v2/libs/program_options/build/gcc-4.7/release/threading-multi/winmain.o > gcc.compile.c++ > bin.v2/libs/program_options/build/gcc-4.7/release/threading-multi/split.o > gcc.link.dll > bin.v2/libs/program_options/build/gcc-4.7/release/threading-multi/libboost_program_options.so.1.53.0 > common.copy stage/lib/libboost_program_options.so.1.53.0 > ln-UNIX stage/lib/libboost_program_options.so > common.mkdir bin.v2/libs/python > common.mkdir bin.v2/libs/python/build > common.mkdir bin.v2/libs/python/build/gcc-4.7 > common.mkdir bin.v2/libs/python/build/gcc-4.7/release > common.mkdir bin.v2/libs/python/build/gcc-4.7/release/threading-multi > gcc.compile.c++ > bin.v2/libs/python/build/gcc-4.7/release/threading-multi/numeric.o > In file included from ./boost/python/detail/prefix.hpp:13:0, > from ./boost/python/numeric.hpp:8, > from libs/python/src/numeric.cpp:6: > ./boost/python/detail/wrap_python.hpp:75:24: fatal error: patchlevel.h: No > such file or directory > compilation terminated. > > Not sure how to fix? A quick search shows the missing file is located at: > > /home/yadav/dev/cpp/boost_1_53_0/tools/build/v2/engine/patchlevel.h > > I am building from /home/yadav/dev/cpp/boost_1_53_0 > > > > On Sat, Feb 23, 2013 at 12:17 AM, Dev Guy <devguy.ca(a)gmail.com> wrote: > >> Hello I got the following build errors on my linux box building version >> 1.53.0 >> >> gcc.compile.c++ >> bin.v2/libs/wave/build/gcc-4.7/release/link-static/threading-multi/cpplexer/re2clex/aq.o >> gcc.compile.c++ >> bin.v2/libs/wave/build/gcc-4.7/release/link-static/threading-multi/cpplexer/re2clex/cpp_re.o >> gcc.archive >> bin.v2/libs/wave/build/gcc-4.7/release/link-static/threading-multi/libboost_wave.a >> common.copy /home/yadav/dev/cpp/boost_1.53.0/lib/libboost_wave.a >> ...failed updating 56 targets... >> ...skipped 6 targets... >> ...updated 10989 targets... >> >> >> Linux version is: >> uname -a >> Linux karma 3.5.0-23-generic #35-Ubuntu SMP Thu Jan 24 13:15:40 UTC 2013 >> x86_64 x86_64 x86_64 GNU/Linux >> >> GCC Version >> gcc -v >> Using built-in specs. >> COLLECT_GCC=gcc >> COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.7/lto-wrapper >> Target: x86_64-linux-gnu >> Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro >> 4.7.2-2ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs >> --enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr >> --program-suffix=-4.7 --enable-shared --enable-linker-build-id >> --with-system-zlib --libexecdir=/usr/lib --without-included-gettext >> --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7 >> --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu >> --enable-libstdcxx-debug --enable-libstdcxx-time=yes >> --enable-gnu-unique-object --enable-plugin --enable-objc-gc >> --disable-werror --with-arch-32=i686 --with-tune=generic >> --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu >> --target=x86_64-linux-gnu >> Thread model: posix >> gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-2ubuntu1) >> >> Thanks! >> > > > > -- > Kind Regards, > Rajinder Yadav > > SafetyNet Test Driven Development > http://safetynet.devmentor.org > -- Kind Regards, Rajinder Yadav SafetyNet Test Driven Development http://safetynet.devmentor.org

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