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Boost ASIO on Windows Mobile 5, asynchronous functions not working
by James Pritts 28 Aug '09

28 Aug '09

I was able to compile boost asio for Windows Mobile 5 using VC 9.0 and STL Port 5.2.1. The synchronous socket functions seem to be working, but the asynchronous functions never call the provided handlers. Does anyone know if asio's asunchronous socket functions work on WinMo5? I know that WinMo 5 does not have i/o completion ports, but the reactors don't seem to be working either. Is asynchronous i/o not possible on Windows Mobile ?. I used the following functions: client_socket_.async_connect(...); client_socket_.async_read_some(...); The async_connect call establishes a connection, but my connect handler is never called. Thanks, Jimmy.

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[serialization] Linker errors in trunk
by Hartmut Kaiser 28 Aug '09

28 Aug '09

Since the latest changes in trunk I'm seeing linker errors while linking with the serialization library (VS2005 SP1, boost_serialization-vc80-mt-gd-1_40.lib): runtime_support.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: __thiscall boost::archive::archive_exception::archive_exception(enum boost::archive::archive_exception::_exception_code,char const *,char const *)" (__imp_??0archive_exception@archive@boost@@QAE@W4_exception_code@012@PBD1@Z) (note the leading underscore in _exception_code) Which is really strange as this symbol is the only missing one. OTOH, the library exports the symbol: boost::archive::archive_exception::archive_exception( enum boost::archive::archive_exception::exception_code, char const *,char const *); (note the missing underscore in exception_code) If I change the first parameter of the archive_exception constructor to be a 'int' everything builds fine. Any clues? Compiler issue? Regards Hartmut

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[lambda] Can I use lambda::bind to a functor with a parametric return type?
by Jesse Perla 28 Aug '09

28 Aug '09

Thanks for the rapid response on the previous question. Now for my real question: I am using an autodifferentiation library and want to use lambda's bind, but still return a generic type. Is this possible? Here is the function I wrote : struct test_function_impl { //result_of supprt template<typename Sig> struct result; template<typename This, typename Arg1, typename Arg2> struct result<This(Arg1, Arg2)> { typedef typename boost::remove_reference<Arg1>::type::value_type type; }; template<typename Vector, typename IntT> typename Vector::value_type //The type in the vector... can be a double or AD type operator()(const Vector& x, IntT y) const{ return x[0] * x[0] + y; } }; The function works on its own, and now std::tr1::result_of seems to work as well. However, I cannot bind to this: using namespace boost::lambda; ublas::bounded_vector<double, 1> x; x[0] = 1.0; int int_value = 1; //THIS FAILS! Not sure if lambda's bind is using result_of? Obviously, can't use the ret<> approach here. auto f = bind(test_function_impl(), _1, int_value); Does lambda support this usage, or should I turn to Phoenix (if so, I am recognizing a trend here). -Jesse

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: Re: How to use the "type" member template pattern for using result_of?
by Jesse Perla 28 Aug '09

28 Aug '09

Thanks to all, Now I was playing around with Phoenix on my binding problem here as well (which is part of the reason for my confusion)... am I right to think that phoenix has a "result" template incompatible with result_of? The following seems to work when using Phoenix lazy functions, etc., but the standard result template did not. struct test_function_impl { //For phoenix... not sure if necessary for template<typename Arg1, typename Arg2> struct result { //typedef typename Arg1::value_type type; }; template<typename Vector, typename IntT> typename Vector::value_type //The type in the vector... can be a double or AD type operator()(const Vector& x, IntT y) const{ return x[0] * x[0] + y; } }; Thanks, Jesse

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Formal Review of Boost.Polygon is halfway through and no actual reviews so far
by Fernando Cacciola 28 Aug '09

28 Aug '09

Dear Developers, The formal review of the Boost.Polygon is halfway through and, while there was some useful discussion, there are still no "actual" reviews (where you clearly vote for inclusion and rejection). If you are interested in a geometric oriented library please try to make the time to post a formal review by the end of September 2 :) Best regards Fernando Cacciola Review Manager

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Linux build of boost using Intel C++ compiler 11.1 or 11.0 and g++ 4.3.3
by Bill O'Hara 28 Aug '09

28 Aug '09

Hi, I guess this may be a known problem but I wonder if there is any straightforward workaround. I need to install boost on our development machines which run Linux and have g++ 4.3.3 installed. We are wondering about also support the Intel c++ compiler (version 11.1). When trying to build boost 1.39 we get many errors during compilation due to g++ builtins like __builtin_isfinite not being found. Example below. Perhaps I've missed something but using the intel toolset when building still seems to involve using these g++ specific features. Is there a workaround? Thanks Bill For example: "icpc" -c -xc++ -O3 -w1 -inline-level=2 -pthread -fPIC -DBOOST_ALL_NO_LIB=1 -DBOOST_MATH_TR1_DYN_LINK=1 -DNDEBUG -I"." -c -o "bin.v2/libs/math/build/intel-linux-11.1/release/threading-multi/lround.o" "libs/math/build/../src/tr1/lround.cpp" ...failed intel-linux.compile.c++ bin.v2/libs/math/build/intel-linux-11.1/release/threading-multi/lround.o... intel-linux.compile.c++ bin.v2/libs/math/build/intel-linux-11.1/release/threading-multi/nextafter.o /usr/include/c++/4.3.3/cmath(522): error: identifier "__builtin_isfinite" is undefined return __builtin_isfinite(__type(__f)); ^ detected during: instantiation of "__gnu_cxx::__enable_if<std::__is_arithmetic<_Tp>::__value, int>::__type std::isfinite(_Tp) [with _Tp=double]" at line 262 of "./boost/math/special_functions/fpclassify.hpp" instantiation of "bool boost::math::detail::isfinite_impl(T, const boost::math::detail::native_tag &) [with T=double]" at line 310 of "./boost/math/special_functions/fpclassify.hpp" instantiation of "bool boost::math::isfinite(T) [with T=double]" at line 56 of "./boost/math/special_functions/next.hpp" instantiation of "T boost::math::float_next(const T &, const Policy &) [with T=double, Policy=c_policies::c_policy]" at line 153 of "./boost/math/special_functions/next.hpp" instantiation of "T boost::math::nextafter(const T &, const T &, const Policy &) [with T=double, Policy=c_policies::c_policy]" at line 27 of "libs/math/build/../src/tr1/c_policy.hpp" instantiation of "T c_policies::nextafter(const T &, const T &) [with T=double]" at line 15 of "libs/math/build/../src/tr1/nextafter.cpp" compilation aborted for libs/math/build/../src/tr1/nextafter.cpp (code 2)

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Re: [Boost-users] [ANN] Boost 1.39.0
by Tom Kent 28 Aug '09

28 Aug '09

I've built windows libraries (vc7.1, vc8, vc9) off of this, if you want them, you can get them from my website: http://boost.teeks99.com Tom > Subject: [Boost-users] [ANN] Boost 1.39.0 > From: Beman Dawes (bdawes_at_[hidden]) > Date: 2009-05-02 16:57:10 > > Boost 1.39.0 is available for download from SourceForge. > > See > http://sourceforge.net/project/showfiles.php?group_id=7586&package_id=8041&… > > New Libraries: Signals2. > > Updated Libraries: Asio, Flyweight, Foreach, Hash, Interprocess, > Intrusive, Program.Options, Proto, PtrContainer, Range, Unordered, > Xpressive. > > Updated Tools: Boostbook, Quickbook. > > Plus the usual bug fixes to numerous libraries. > > Please report any problems to the Boost users or developers mailing > list. > > Thanks, > > --Beman Dawes, Daniel James, and all the other Boosters who help get > releases out

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How to use the "type" member template pattern for using result_of?
by Jesse Perla 28 Aug '09

28 Aug '09

Take the following function: struct test_function { template<typename Vector, typename IntType> typename Vector::value_type operator()(const Vector& x, IntType bound_value) const{ return x[0] * x[0] + bound_value; } }; I wasn't sure exactly how the "type" member template pattern works so that result_of will work. I tried the following, but can't figure out how to extract the type of the arguments or convert to an MPL sequence? Is there some trick I am missing? struct test_function { template<typename Args> struct result { //HOW TO CONVERT TO MPL SEQUENCE OR ANOTHER APPROACH? typedef typename boost::mpl::at_c<Args, 0 >::type::value_type type; }; template<typename Vector, typename IntType> typename Vector::value_type //The type in the vector... can be a double or AD type operator()(const Vector& x, IntType bound_value) const{ return x[0] * x[0] + bound_value; } }; Thanks, Jesse

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[interprocess] remove
by Moritz 28 Aug '09

28 Aug '09

Hi, I have a question concerning the remove function of managed_shared_memory. Actually I am not able to remove a segment of shared memory. See the following example. It writes 0 to the output stream. But why? #include <boost/interprocess/managed_shared_memory.hpp> #include <iostream> int main() { boost::interprocess::managed_shared_memory * managed_shm; managed_shm = new boost::interprocess::managed_shared_memory(boost::interprocess::open_or_create, "TestMem", 1024); delete managed_shm; std::cerr << boost::interprocess::shared_memory_object::remove("TestMem") << std::endl; }

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boost::function unusable as overloadable function argument
by Peter Soetens 28 Aug '09

28 Aug '09

Hi, I had this situation in a bigger program, where a user could supply a string or a function object: <code> #include <boost/function.hpp> #include <string> void foo1(int i, std::string a); void foo1(int i, boost::function<void(void)> foo ); int main(int argc, char** argv) { //boost::function<void(void)> foo = "hello"; // this line won't compile foo1( 3, "hello" ); //error: call of overloaded ‘foo1(int, const char [6])’ is ambiguous return 0; } </code> Although constructing a boost::function from a C string is nonsense, the compiler does consider it as an alternative when trying to find the right foo1. Is there any work around to keep the overloads without requiring the user to write foo1(3, string("hello")); or is this a compiler bug (g++ (Ubuntu 4.3.3-5ubuntu4) 4.3.3)? Thanks for any insights, Peter

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[unit_test_framework] checkpoints for BOOST_CHECK*?
by rozelak＠volny.cz 28 Aug '09

28 Aug '09

Hallo, I need to write an unit test checking several various inputs. As there may be larger number of the inputs, I thought about a loop. The problem is how to know the input for which the test failed (if it failed). I wanted to write something like this: .... BOOST_AUTO_TEST_CASE(....) { // each tested_variant may be quite complicated structure for (tested_variants::iterator i) { BOOST_TEST_CHECKPOINT("variant:" << i); // not usable for what I need :-( BOOST_CHECK_EQUAL(i.expected, tested_method(i.data)); } } .... However, BOOST_TEST_CHECKPOINT() does not work in this situation (well, according to the documentation it works for exceptions only). Is there a way how to achieve what I am looking for? Thank you very much, Dan T.

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Copy of a C++ object extended with Boost.Python
by 4ian 28 Aug '09

28 Aug '09

I have a simple C++ object, exposed to python with Boost.python, like this : ------------------------------------------------- BOOST_PYTHON_MODULE(MyModule) { class_<MyObject>("MyObject")... } ------------------------------------------------- I call then python, making an instance of MyObject accessible : ------------------------------------------------- MyObject anInstance; object main_module((handle<>( borrowed( PyImport_AddModule ( "__main__" ) ) ) ) ); object main_namespace = main_module.attr( "__dict__" ); object myModule( (handle<>(PyImport_ImportModule("MyModule"))) ); main_namespace["anInstance"] = ptr(&anInstance); try { handle<> ignored(( PyRun_String( "anInstance.aNewMember = 1;print anInstance.aNewMember;", Py_file_input, main_namespace.ptr(), main_namespace.ptr() ) ) ); } catch ( error_already_set ) { PyErr_Print(); } ------------------------------------------------- You can observe that I've added a member ( aNewMember ) to MyObject instance. But if I make a copy of my object : ------------------------------------------------- MyObject anotherInstance = anInstance; main_namespace["anotherInstance"] = ptr(&anotherInstance); try { handle<> ignored(( PyRun_String( "print anotherInstance.aNewMember;", Py_file_input, main_namespace.ptr(), main_namespace.ptr() ) ) ); } catch ( error_already_set ) { PyErr_Print(); } ------------------------------------------------- I have a error saying that MyObject hasn't any "aNewMember" member. What I have added with python has not been copied/transfered. Is there a workaround to add permanently some new members to wrapped objects ?

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pathological regex?
by Michał Nowotka 28 Aug '09

28 Aug '09

Hello, I use boost regex v 1.37 on Ubuntu 9.04, g++-4.3. Because of performance issues i replaced defaut matching algorithm to BOOST_REGEX_RECURSIVE but then my program dont't work properly. So, is this expression pathological: (https?://)?([^/@]*[\\.@])?google.com[/\\?&#]* ? -- Regards Michał Nowotka

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Define a callback member function inside the object instance
by Daniele Barzotti 28 Aug '09

28 Aug '09

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, I would ask you a suggestion. In according with the FAQ (http://www.parashift.com/c++-faq-lite/pointers-to-members.html#faq-33.2) is better to not set a non-static member function like a callback. But If I need to pass that callback inside my object, I'm pretty sure that the object itself exist! So if I have a callback signature like this: int my_callback(void *outputBuffer, void *inputBuffer, unsigned int nFrames, double streamTime, int status, void *userData ) And I want to bind it to a member function: int MyObject::my_callback(....) Now, inside the object I have something like: MyObject::OneMethod() { p_AnotherObject->SetCallBack( ???? ); } How can I pass my MyObject::my_callback to SetCallBack using boost::function and/or boost::bind? Thanks! Daniele. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (MingW32) iD8DBQFKl65//l+kMioSZwgRAkA8AKCdk44mlTXESXQJUG7vzqVnUHFoXgCghGW5 Icf+E8uX8cLwwfkdnCFmoKs= =s1nk -----END PGP SIGNATURE-----

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Problem with serialization, load_wrapper
by Mikael Carlsson 28 Aug '09

28 Aug '09

Dear group, I am working with a observer pattern in a simulator and would like to restore the simulators state. This means that I need to restore the pointers to the observers in the subject. My simple example contains a composite that holds pointers to base class of the observers. The observable hold one of the observers using a base class pointer. The save part is OK but when I introduce restore I get compile time errors. Compiling (dbg) main.cpp obj/main.o /home/ecarmik/boost/include/boost-1_39/boost/archive/detail/iserializer.hpp: In function 'void boost::archive::load(Archive&, const T&) [with Archive = boost::archive::text_iarchive, T = composite]': /home/ecarmik/boost/include/boost-1_39/boost/archive/detail/common_iarchive.hpp:59: instantiated from 'void boost::archive::detail::common_iarchive<Archive>::load_override(T&, int) [with T = const composite, Archive = boost::archive::text_iarchive]' /home/ecarmik/boost/include/boost-1_39/boost/archive/basic_text_iarchive.hpp:62: instantiated from 'void boost::archive::basic_text_iarchive<Archive>::load_override(T&, int) [with T = const composite, Archive = boost::archive::text_iarchive]' /home/ecarmik/boost/include/boost-1_39/boost/archive/text_iarchive.hpp:65: instantiated from 'void boost::archive::text_iarchive_impl<Archive>::load_override(T&, int) [with T = const composite, Archive = boost::archive::text_iarchive]' /home/ecarmik/boost/include/boost-1_39/boost/archive/detail/interface_iarchive.hpp:61: instantiated from 'Archive& boost::archive::detail::interface_iarchive<Archive>::operator>>(T&) [with T = const composite, Archive = boost::archive::text_iarchive]' main.cpp:24: instantiated from here /home/ecarmik/boost/include/boost-1_39/boost/archive/detail/iserializer.hpp:560: error: no matching function for call to 'load_wrapper(boost::archive::text_iarchive&, const composite&, boost::serialization::is_wrapper<composite>)' make: *** [obj/main.o] Error 1 Is it possible to re-create objects during restore from file. Please note that composite class only contains base class pointers. Do I need to create a separate load to do this with constructors? Where can I read about this or even better, find an example? Please find the files included. / Mikael

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[asio] serial_port::async_read_some() and scalable buffers
by Robert Dailey 28 Aug '09

28 Aug '09

Hello, I have a std::vector of bytes that I am passing into boost::asio::buffer(). The vector originally is of size 0. Basically, I want the vector to be resized by asio depending on how much data is read in. I don't want to choose an arbitrary upper-limit for the buffer. Is this possible? Below is an example of what I am doing: std::vector<boost::uint8_t> stream; m_port.async_read_some( boost::asio::buffer( stream ), boost::bind( &SerialClient::ReadCompleted, this, stream, error, bytes_transferred ) ); However, the above code will never read any data because my vector is 0 and it expects it to have a size. --------- Robert Dailey

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Generically comparing structs
by Bill Buklis 28 Aug '09

28 Aug '09

Frequently I have to write comparison functions (usually of the "less" variety) that involve multiple keys or members of a struct. For example: struct s { A a; B b; C c; D d; // there may be other members not used in the comparison }; // operator< function or an equivalent function object bool operator<( const s& lhs, const s& rhs ) { if( lhs.a < rhs.a ) return(true); else if( lhs.a == rhs.a ) { if( lhs.b < rhs.b ) return(true); else if( lhs.b == rhs.b ) //and so on... } return(false); } This gets quite repetitive, especially if I have to write alternate sort orders (e.g. b,a,c,d or c,d,a,b) I'm thinking there has to an easier way to do this or a way to do a generic algorithm for this. Is there anything in boost that would help? I had an idea that one might be able to fill a vector with binders for each element and then call lexicographical_compare, but I'm not sure how to make it work.

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[iostreams] problems with operator<<
by Robert Dailey 28 Aug '09

28 Aug '09

Hello, I'm using the container_device class provided in the documentation. I'm creating my stream and device like so: typedef boost::iostreams::stream< container_device<std::vector<boost::uint8_t > > > ByteStream; ByteStream stream; stream << "Hello"; This compiles fine, however when I run this code I get an assertion deep inside of the << operator, which is in the std namespace. I thought that boost::iostreams would have its own global << and >> operators? I was expecting the << operator to directly call my device's write() method, but it doesn't. Perhaps I just don't understand how this works. I'm trying to write out binary data. The string should translate to a series of bytes in the container. The assertion I'm hitting is in optional.hpp in Boost. I'm using MSVC9 as my compiler: T& operator*() { assert(initialized_); return *static_cast<T*>(address()); } Above contains the code snippet where the assertion is happening. I have no idea what this assert means. Below is my callstack: > VFDTester.exe!boost::iostreams::detail::optional<boost::iostreams::detail::concept_adapter<container_device<std::vector<unsigned char,std::allocator<unsigned char> > > > >::operator*() Line 55 + 0x1f bytes C++ VFDTester.exe!boost::iostreams::detail::indirect_streambuf<container_device<std::vector<unsigned char,std::allocator<unsigned char> > >,std::char_traits<unsigned char>,std::allocator<unsigned char>,boost::iostreams::seekable>::obj() Line 104 + 0x19 bytes C++ VFDTester.exe!boost::iostreams::detail::indirect_streambuf<container_device<std::vector<unsigned char,std::allocator<unsigned char> > >,std::char_traits<unsigned char>,std::allocator<unsigned char>,boost::iostreams::seekable>::overflow(long c=72) Line 301 + 0x15 bytes C++ VFDTester.exe!std::basic_streambuf<unsigned char,std::char_traits<unsigned char> >::sputc(unsigned char _Ch='H') Line 163 + 0x4c bytes C++ VFDTester.exe!std::operator<<<unsigned char,std::char_traits<unsigned char> >(std::basic_ostream<unsigned char,std::char_traits<unsigned char> > & _Ostr={...}, const char * _Val=0x0074a7b0) Line 679 + 0x32 bytes C++ VFDTester.exe!MainFrame::OnConnectPressed(wxCommandEvent & event={...}) Line 82 + 0x36 bytes C++ --------- Robert Dailey

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[boost.function] conflict with tr1::function shipped with VC++10
by Tan, Tom (Shanghai) 28 Aug '09

28 Aug '09

Hi, I found a problem in using boost.function with VC++ 10, the code below reproduces the problem: #include <boost/function.hpp> #include <vector> typedef std::vector<int> test_type; template<class T> struct S { void test_g() { typedef S<T> this_class; boost::function<void (this_class*, test_type)> s(&this_class::g); } void g(test_type){} }; int main() { S<int> s; s.test_g(); } This code is OK with VC++ 2008, but with VC++ 2010, it yields the following message. Is there anything that I can do to solve the ambiguity? Thanks. C:\Boost\include\boost-1_39_0\boost/function/function_template.hpp(538) : error C2668: 'boost::mem_fn' : ambiguous call to overloaded function C:\Boost\include\boost-1_39_0\boost/bind/mem_fn_cc.hpp(25): could be 'bo ost::_mfi::mf1<R,T,A1> boost::mem_fn<void,S<int>,test_type>(R (__thiscall S<int> ::* )(A1))' with [ R=void, T=S<int>, A1=test_type ] C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\xxmem_fn(32): o r 'std::tr1::_Mem_fn2<_Rx,_Pmf,_Arg0,_Arg1> std::tr1::mem_fn<void,S<T>,tes t_type>(_Rx (__thiscall S<T>::* )(_Arg1))' [found using argument-dependent looku p] with [ _Rx=void, _Pmf=void (__thiscall S<int>::* )(test_type), _Arg0=S<int>, _Arg1=test_type, T=int ] while trying to match the argument list '(void (__thiscall S<T>::* )(tes t_type))' with [ T=int ] .....

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using embedded stringstream on a single line.
by Avi Bahra 27 Aug '09

27 Aug '09

Is there anything in boost/design pattern that can help with following: std::stringstream ss; ss << "SUBMIT: Task(" << absPath << ") "; log( Log::DBG, ss ); The code I am working on does this all over the place, what I would like is : log( Log::DBG, "SUBMIT: Task(" << absPath << ") " ); Best regards, Ta, Avi

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Feedback on units use
by Noah Roberts 27 Aug '09

27 Aug '09

Is there a better way to do the following? The purpose is to provide a conversion from a pressure to a head given the density of the fluid the head should be in. Head is "hydrostatic pressure" and is a measure of the length a fluid can be pushed up a column at pressure X. The value is a function of the fluid and of the pressure acted upon that fluid. Object is to do this in any system. Part of the equation is the constant "g", which is acceleration due to gravity. We're modeling objects on earth so the value of g is 9.80665 m/s^2. The conversion equation is very basic: h = p / (d * g) where h is the headloss in length, p is pressure, d is mass density, and g is the gravitational constant. #include <boost/units/quantity.hpp> #include <boost/units/physical_dimensions.hpp> template < typename T, typename System > struct acceleration_due_to_gravity; template < typename T, typename System > boost::units::quantity< boost::units::unit<boost::units::length_dimension, System>, T > pressure_to_head( boost::units::quantity< boost::units::unit<boost::units::pressure_dimension, System>, T > press , boost::units::quantity< boost::units::unit<boost::units::mass_density_dimension, System>, T> density) { return press / (density * acceleration_due_to_gravity<T,System>::value()); } #include <boost/units/systems/si.hpp> template < typename T > struct acceleration_due_to_gravity<T, boost::units::si::system> { typedef boost::units::si::system System; static boost::units::quantity< boost::units::unit< boost::units::acceleration_dimension, System>, T> value() { return boost::units::quantity<boost::units::unit< boost::units::acceleration_dimension, System>, T>::from_value(9.80665); } };

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Re: [Boost-users] Compiling python extensions examples fail
by Dan Sanduleac 27 Aug '09

27 Aug '09

I had the same issue, trying to compile latest svn trunk of boost. When I bootstrap.sh-ed, it created project-config.jam which had my python configuration in it (I provided --with-python-root=). Now, I also had ~/user-config.jam which had the exact same line ("using python : 2.6 : /home/dan/stackless ;") and bjam wasn't sure which one of those to choose, even though they were identical. The solution for me was to remove the superfluous user-config.jam from my home directory. Sean Snyders wrote: > > Hi, > > I've compiled Boost 1.39 locally (to a folder > '/local1/installs/boost_1_39_0') such that I can try out building python > extensions without disrupting the current system setup. I compiled it with > gcc 4.3.3 64bit and with python 2.5.2 64bit. > > My system details are: > Ubuntu 7.04 > Linux 2.6.25.18-20081021 x86_64 GNU/Linux > > I've setup my jam configs as follows: > file: ~/boost-build.jam > containing: boost-build /local1/installs/boost_1_39_0/tools/build/v2 ; > > file: /local1/installs/boost_1_39_0/tools/build/v2/site_config.jam > containing: > using gcc : : /vol/apps/gcc-4.3.3_64/bin/g++ ; > using python : : /vol/apps/python-2.5.2_64/bin/python ; > > I'm trying to compile the python tutorial > 'boost_1_39_0/libs/python/example/tutorial' using bjam and get the > following errors when running it: > ------- > error: No best alternative for /python_for_extensions > next alternative: required properties: <python>2.5 <target-os>linux > matched > next alternative: required properties: <python>2.5 <target-os>linux > matched > /local1/installs/boost_1_39_0/tools/build/v2/build/property.jam:613: in > find-replace from module object(property-map)@1 > error: Ambiguous key <target-type>PYTHON_EXTENSION > .... > .. > . > ------ > > Here is the full output that is given with the '--debug-configuration' > option: > ---------------------------------------------- > ssnyders@machine:/local1/installs/boost_1_39_0/libs/python/example/tutorial > {650} > /local1/ssnyders/boost_1_39_0/bin/bjam --debug-configuration > notice: found boost-build.jam at > /local1/installs/boost_1_39_0/libs/python/example/boost-build.jam > notice: loading Boost.Build from > /local1/installs/boost_1_39_0/tools/build/v2 > notice: Searching /etc /usr/home/ssnyders > /local1/installs/boost_1_39_0/libs/python/example/../../../tools/build/v2 > /usr/share/boost-build /local1/installs/boost_1_39_0/tools/build/v2/kernel > /local1/installs/boost_1_39_0/tools/build/v2/util > /local1/installs/boost_1_39_0/tools/build/v2/build > /local1/installs/boost_1_39_0/tools/build/v2/tools > /local1/installs/boost_1_39_0/tools/build/v2/contrib > /local1/installs/boost_1_39_0/tools/build/v2/. for site-config > configuration file site-config.jam . > notice: Loading site-config configuration file site-config.jam from > /local1/installs/boost_1_39_0/tools/build/v2/site-config.jam . > notice: will use '/vol/apps/gcc-4.3.3_64/bin/g++' for gcc, condition > <toolset>gcc-4.3.3 > notice: using gcc libraries :: <toolset>gcc-4.3.3 :: > /vol/apps/gcc-4.3.3_64/bin /vol/apps/gcc-4.3.3_64/lib > /vol/apps/gcc-4.3.3_64/lib32 /vol/apps/gcc-4.3.3_64/lib64 > notice: using gcc archiver :: <toolset>gcc-4.3.3 :: ar > warning: toolset gcc initialization: can not find tool windres > warning: initialized from > /local1/installs/boost_1_39_0/tools/build/v2/build/project.jam:874 > notice: using rc compiler :: <toolset>gcc-4.3.3 :: as > notice: [python-cfg] Configuring python... > notice: [python-cfg] user-specified cmd-or-prefix: > "/vol/apps/python-2.5.2_64/bin/python" > notice: [python-cfg] Checking interpreter command > "/vol/apps/python-2.5.2_64/bin/python"... > notice: [python-cfg] running command > '"/vol/apps/python-2.5.2_64/bin/python" -c "from sys import *; print > 'version=%d.%d\nplatform=%s\nprefix=%s\nexec_prefix=%s\nexecutable=%s' % > (version_info[0],version_info[1],platform,prefix,exec_prefix,executable)" > 2>&1' > notice: [python-cfg] ...requested configuration matched! > notice: [python-cfg] Details of this Python configuration: > notice: [python-cfg] interpreter command: > "/vol/apps/python-2.5.2_64/bin/python" > notice: [python-cfg] include path: > "/vol/apps/python-2.5.2_64/include/python2.5" > notice: [python-cfg] library path: > "/vol/apps/python-2.5.2_64/lib/python2.5/config" > "/vol/apps/python-2.5.2_64/lib" > notice: Searching /usr/home/ssnyders > /local1/installs/boost_1_39_0/libs/python/example/../../../tools/build/v2 > /usr/share/boost-build /local1/installs/boost_1_39_0/tools/build/v2/kernel > /local1/installs/boost_1_39_0/tools/build/v2/util > /local1/installs/boost_1_39_0/tools/build/v2/build > /local1/installs/boost_1_39_0/tools/build/v2/tools > /local1/installs/boost_1_39_0/tools/build/v2/contrib > /local1/installs/boost_1_39_0/tools/build/v2/. for user-config > configuration file user-config.jam . > notice: Loading user-config configuration file user-config.jam from > /usr/home/ssnyders/user-config.jam . > notice: Searching ../../../.. for project-config configuration file > project-config.jam . > notice: Loading project-config configuration file project-config.jam from > ../../../../project-config.jam . > notice: [python-cfg] Configuring python... > notice: [python-cfg] user-specified version: "2.5" > notice: [python-cfg] user-specified cmd-or-prefix: > "/vol/apps/python-2.5.2_64" > notice: [python-cfg] Checking interpreter command > "/vol/apps/python-2.5.2_64/bin/python2.5"... > notice: [python-cfg] running command > '"/vol/apps/python-2.5.2_64/bin/python2.5" -c "from sys import *; print > 'version=%d.%d\nplatform=%s\nprefix=%s\nexec_prefix=%s\nexecutable=%s' % > (version_info[0],version_info[1],platform,prefix,exec_prefix,executable)" > 2>&1' > notice: [python-cfg] ...requested configuration matched! > notice: [python-cfg] Details of this Python configuration: > notice: [python-cfg] interpreter command: > "/vol/apps/python-2.5.2_64/bin/python2.5" > notice: [python-cfg] include path: > "/vol/apps/python-2.5.2_64/include/python2.5" > notice: [python-cfg] library path: > "/vol/apps/python-2.5.2_64/lib/python2.5/config" > "/vol/apps/python-2.5.2_64/lib" > notice: iostreams: using prebuilt zlib > notice: iostreams: using prebuilt bzip2 > error: No best alternative for /python_for_extensions > next alternative: required properties: <python>2.5 <target-os>linux > matched > next alternative: required properties: <python>2.5 <target-os>linux > matched > /local1/installs/boost_1_39_0/tools/build/v2/build/property.jam:613: in > find-replace from module object(property-map)@1 > error: Ambiguous key <target-type>PYTHON_EXTENSION <asynch-exceptions>off > <debug-symbols>on <exception-handling>on <extern-c-nothrow>off > <hardcode-dll-paths>true <host-os>linux <inlining>off > <install-dependencies>off <link>shared <main-target-type>PYTHON_EXTENSION > <optimization>off <os>LINUX <pch>on <preserve-test-targets>on > <profiling>off <python-debugging>off > <python.interpreter>/vol/apps/python-2.5.2_64/bin/python > <python.interpreter>/vol/apps/python-2.5.2_64/bin/python2.5 <python>2.5 > <rtti>on <runtime-debugging>on <runtime-link>shared <stdlib>native > <suppress-import-lib>true <symlink-location>project-relative > <target-os>linux <target>object(file-target)@408 <threadapi>pthread > <threading>single <toolset-gcc:version>4.3.3 <toolset>gcc > <user-interface>console <variant>debug <warnings-as-errors>off > <warnings>on > /local1/installs/boost_1_39_0/tools/build/v2/build/property.jam:590: in > object(property-map)(a)1.find from module object(property-map)@1 > /local1/installs/boost_1_39_0/tools/build/v2/build/type.jam:335: in > generated-target-ps-real from module type > /local1/installs/boost_1_39_0/tools/build/v2/build/type.jam:359: in > generated-target-ps from module type > /local1/installs/boost_1_39_0/tools/build/v2/build/type.jam:270: in > type.generated-target-suffix from module type > /local1/installs/boost_1_39_0/tools/build/v2/build/virtual-target.jam:501: > in virtual-target.add-prefix-and-suffix from module virtual-target > /local1/installs/boost_1_39_0/tools/build/v2/build/virtual-target.jam:460: > in _adjust-name from module object(file-target)@408 > /local1/installs/boost_1_39_0/tools/build/v2/build/virtual-target.jam:243: > in abstract-file-target.__init__ from module object(file-target)@408 > /local1/installs/boost_1_39_0/tools/build/v2/build/virtual-target.jam:553: > in object(file-target)(a)408.__init__ from module object(file-target)@408 > /local1/installs/boost_1_39_0/tools/build/v2/kernel/class.jam:88: in > class.new from module class > /local1/installs/boost_1_39_0/tools/build/v2/build/generators.jam:565: in > generator.generated-targets from module object(gcc-linking-generator)@403 > /local1/installs/boost_1_39_0/tools/build/v2/tools/builtin.jam:893: in > linking-generator.generated-targets from module > object(gcc-linking-generator)@403 > /local1/installs/boost_1_39_0/tools/build/v2/tools/unix.jam:67: in > generated-targets from module object(gcc-linking-generator)@403 > /local1/installs/boost_1_39_0/tools/build/v2/build/generators.jam:462: in > construct-result from module object(gcc-linking-generator)@403 > /local1/installs/boost_1_39_0/tools/build/v2/build/generators.jam:415: in > run-really from module object(gcc-linking-generator)@403 > /local1/installs/boost_1_39_0/tools/build/v2/build/generators.jam:390: in > generator.run from module object(gcc-linking-generator)@403 > /local1/installs/boost_1_39_0/tools/build/v2/tools/builtin.jam:808: in > linking-generator.run from module object(gcc-linking-generator)@403 > /local1/installs/boost_1_39_0/tools/build/v2/tools/unix.jam:41: in > unix-linking-generator.run from module object(gcc-linking-generator)@403 > /local1/installs/boost_1_39_0/tools/build/v2/tools/gcc.jam:506: in > object(gcc-linking-generator)(a)403.run from module > object(gcc-linking-generator)@403 > /local1/installs/boost_1_39_0/tools/build/v2/build/generators.jam:1000: in > try-one-generator-really from module generators > /local1/installs/boost_1_39_0/tools/build/v2/build/generators.jam:1062: in > try-one-generator from module generators > /local1/installs/boost_1_39_0/tools/build/v2/build/generators.jam:1274: in > construct-really from module generators > /local1/installs/boost_1_39_0/tools/build/v2/build/generators.jam:1346: in > generators.construct from module generators > /local1/installs/boost_1_39_0/tools/build/v2/build/targets.jam:1437: in > construct from module object(typed-target)@77 > /local1/installs/boost_1_39_0/tools/build/v2/build/targets.jam:1250: in > object(typed-target)(a)77.generate from module object(typed-target)@77 > /local1/installs/boost_1_39_0/tools/build/v2/build/targets.jam:710: in > generate-really from module object(main-target)@385 > /local1/installs/boost_1_39_0/tools/build/v2/build/targets.jam:682: in > object(main-target)(a)385.generate from module object(main-target)@385 > /local1/installs/boost_1_39_0/tools/build/v2/build/targets.jam:258: in > object(project-target)(a)74.generate from module object(project-target)@74 > /local1/installs/boost_1_39_0/tools/build/v2/build-system.jam:700: in load > from module build-system > /local1/installs/boost_1_39_0/libs/python/example/../../../tools/build/v2/kernel/modules.jam:283: > in import from module modules > /local1/installs/boost_1_39_0/libs/python/example/../../../tools/build/v2/kernel/bootstrap.jam:138: > in boost-build from module > /local1/installs/boost_1_39_0/libs/python/example/boost-build.jam:7: in > module scope from module > > ---------------------------------------------- > -- View this message in context: http://www.nabble.com/Compiling-python-extensions-examples-fail-tp24526932p… Sent from the Boost - Users mailing list archive at Nabble.com.

1 0

Race condition with Boost::Thread
by Rob Yull 27 Aug '09

27 Aug '09

I've been writing a thread pool class as kind of an experiment with boost.threads, boost.bind, and boost.function. The code below is the worker thread, that will eventually pull jobs from a queue, execute them, then look and see if there is another job in the queue. I think I've got an interesting race condition. The problem I'm having is when the class goes out of scope. I'm getting an access violation from the run() member function (which is function being run by m_Thread). Right now, run() is just entering and leaving (no actual queue checking). By the time run() is getting executed, the class is starting to execute the destructor. I thought that having the join() call in the destructor should allow the thread to finish before the class data is destroyed. In Visual Studio 2005's debugger, when it is getting to run(), it looks like the object has already been destroyed (this = 0x7fffffff), so the access violation is coming from the assignment to the m_Running member variable. If I take out the assignment, and run the debug, when it is entering run(), the this pointer is still showing as invalid, but the function completes and ends up back at the join() in the destructor, where the this pointer in the destructor is valid again. So as far as the destructor seems to be conserned, the class hasn't been destroyed yet, but as far as the member class is, it has been destroyed already. If I do pad some instructions/time before the class goes out of scope, run() executes just fine (this pointer is valid). I have also tried moving the creation of m_Thread outside of the constructor to a separate member function call, but the result is the same. I know debugging multithreaded apps can be difficult. Is there right out something I'm doing wrong here or making some kind of bad assumpion about the execution of run()? #include <boost/config.hpp> #include <boost/thread.hpp> #include <boost/functional.hpp> class WorkerThread { public: typedef boost::function<void ()> JobType; WorkerThread() { m_Thread = boost::thread(boost::bind(&WorkerThread::run, boost::ref(this))); m_Running = true; } ~WorkerThread() { m_Thread.join(); } const bool isRunning() const { return m_Running; } private: volatile bool m_Running; boost::thread m_Thread; void run() { m_Running = false; // Access violation here } private: WorkerThread(const WorkerThread& rhs); WorkerThread& operator = (const WorkerThread& rhs); }; int main() { WorkerThread wt; // new thread should start executing here return 0; } -Rob Yull

4 6

generic programming : variadic virtual function
by Stephen Nuchia 27 Aug '09

27 Aug '09

I'm finally doing something nontrivial with templates and I've painted myself into an interesting corner. boost::enable_if looks like it might be a solution but I've not made it work yet. extracting the essence of the situation: template<typename S, typename W> class baseclass { virtual void operator()(S s, W w) = 0; } template<typename S> class baseclass<S,void> { virtual void operator()(S s) = 0; } template<typename S, typename W = void> class derived : public baseclass<S,W> { void operator()(S s); // if W is void void operator()(S s, W w); // otherwise } How can I make this work? MSVC9, if that makes a difference. I tried adapting some examples from the enable_if documentation but that led to wandering around aimlessly making random changes to the text. TIA, -swn

3 4

[serialization] skipping top node "<boost_serialization signature...>"
by Sebastian Mach 27 Aug '09

27 Aug '09

Good morning everyone I'd like to use boost::serialization for the generation of xml-files. The format of those files shall not be specific to or dependent of boost, i.e. I'd like boost to not write the root-node of "<boost_serialization signature="serialization::archive" version=...>". E.g., instead of <?xml version="1.0" encoding="UTF-8" standalone="yes" ?> <!DOCTYPE boost_serialization> <boost_serialization signature="serialization::archive" version="4"> <picogen-qt-scene class_id="0" tracking_level="0" version="0"> <comment>hello world!</comment> <fenum>two</fenum> </picogen-qt-scene> </boost_serialization> I would prefer <?xml version="1.0" encoding="UTF-8" standalone="yes" ?> <picogen-qt-scene class_id="0" tracking_level="0" version="0"> <comment>hello world!</comment> <fenum>two</fenum> </picogen-qt-scene> . I wonder if this is possible without tweakage of boost components (meaning that I would have to fork or write patches). I tried the serialization-documentation and google, but could not find appropriate information (or maybe I missed the right words). Best Regards Sebastian Mach http://picogen.org

3 5