November 2008 - Boost-users

Multidimensional distributions in the math toolkit?
by jesseperla＠gmail.com 12 Nov '08

12 Nov '08

Hi, I realize that it isn't in the released version, but has any thinking or progress been made on multidimensional distributions extending the math toolkit distributions? I would love to have a bi-normal, bi-lognormal, and a discrete 2-dim Markov distribution? Thanks, Jesse

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boost timer with sleep
by Andre Paim Lemos 12 Nov '08

12 Nov '08

The following code: #include <iostream> #include <boost/timer.hpp> #include <unistd.h> int main() { boost::timer t; sleep(1); std::cout << t.elapsed() << std::endl; t.restart(); sleep(3); std::cout << t.elapsed() << std::endl; return(0); } Returns (compiled with gcc 4.2.4 on Ubuntu Linux 8.04 using boost 1.36): andre@andre-desktop:~/test$ ./timer_test 0 0 Is this result expected? Why? There is another timer implementation that works with sleep? []'s Andre Paim Lemos

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I have a crash when I included serialization in my Mixed C++ project
by Raj Prasan 12 Nov '08

12 Nov '08

I had a project using both native and CLR code C++.Net. I added serialization to it. Its just crashing. I checked RTTI IS enabled.. I had this problem earlier. I had split the serialization function to both .h and .cpp files. Then it disappered when I wrote it in the class declaration in the .h file. But after I did the same to all the classes (almost 20) that needed serialization. It compiles fine, but crashes even before starting.. Debug information ============= //below the msg box that appears --------------------------- Microsoft Visual C++ Debug Library --------------------------- Debug Assertion Failed! Program: g:\Development\R50\Debug\New Rapid Vision.exe File: f:\dd\vctools\crt_bld\self_x86\crt\src\dbgheap.c Line: 1511 Expression: _CrtIsValidHeapPointer(pUserData) For information on how your program can cause an assertion failure, see the Visual C++ documentation on asserts. (Press Retry to debug the application) --------------------------- Abort Retry Ignore --------------------------- //stack trace msvcr90d.dll!_msize_dbg(void * pUserData=0xdc9ffce0, int nBlockUse=2) Line 1511 + 0x30 bytes C++ msvcr90d.dll!_dllonexit_nolock(int (void)* func=0xdcd983c0, void (void)* * * pbegin=0x0012eecc, void (void)* * * pend=0x0012eec4) Line 295 + 0xd bytes C msvcr90d.dll!__dllonexit(int (void)* func=0xdcd983c0, void (void)* * * pbegin=0x0012eecc, void (void)* * * pend=0x0012eec4) Line 273 + 0x11 bytes C New Rapid Vision.exe!_onexit(int (void)* func=0x00467f20) Line 110 + 0x1b bytes C New Rapid Vision.exe!atexit(void (void)* func=0x00467f20) Line 127 + 0x9 bytes C New Rapid Vision.exe!boost::serialization::singleton<boost::archive::detail::`anonymous namespace'::oserializer_map<boost::archive::xml_oarchive> >::get_instance() Line 104 + 0x34 bytes C++ New Rapid Vision.exe!`dynamic initializer for 'boost::serialization::singleton<boost::archive::detail::`anonymous namespace'::oserializer_map<boost::archive::xml_oarchive> >::instance''() Line 121 + 0x8 bytes C++ [Managed to Native Transition] New Rapid Vision.exe!_initterm(void** pfbegin = 0x004683C4, void pfend = ) Line 130 C++ New Rapid Vision.exe!<CrtImplementationDetails>::LanguageSupport::InitializeNative() Line 534 C++ New Rapid Vision.exe!<CrtImplementationDetails>::LanguageSupport::_Initialize() Line 657 C++ New Rapid Vision.exe!<CrtImplementationDetails>::LanguageSupport::Initialize() Line 855 C++ New Rapid Vision.exe!?.cctor@@$$FYMXXZ() Line 901 + 0x9 bytes C++ [Frames below may be incorrect and/or missing, no symbols loaded for mscorwks.dll] kernel32.dll!7c83971e() kernel32.dll!7c809a69() kernel32.dll!7c83971e() kernel32.dll!7c809a69() mscoree.dll!7900b1b3() kernel32.dll!7c816fd7() -- With best Regards Rajavanya S Twitter me @ https://twitter.com/quakeboy I Blog @ http://www.techtola.com Call me @ 9916-90-93-92 ---------------------------------------------------------------------------------------------- "True love is knowing a person's faults, And loving them even more for them."

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Re: [Boost-users] [graph] predecessor_recorder and VertexList=listS
by M. Siebeneicher 12 Nov '08

12 Nov '08

Hello Andrew, thank you for your suggestions. Unfortunately I still have compile problems. I tried both ways, indexing by bundled properties and by using an external map. Inside the call of breadth_first_search(...) both ways end with the same compiler error (partially in german) : boost_1_35_0\boost\graph\visitors.hpp(160): error C2664: 'void put<std::allocator<_Ty>::value_type,Vertex>(T * ,ptrdiff_t,const V & )': Konvertierung des Parameters 2 von 'boost::adjacency_list_traits<OutEdgeListS,VertexListS,DirectedS>::vertex_descriptor ' in 'ptrdiff_t' nicht möglich with [ _Ty=boost::detail::adj_list_gen<boost::adjacency_list<boost::listS,boost::listS,boost::bidirectionalS,boost::property<boost::vertex_distance_t,unsigned int,de::audi::scenetree::VertexContainer>,GeoTrafo::cPose>,boost::listS,boost::listS,boost::bidirectionalS,boost::detail::retag_property_list<boost::vertex_bundle_t,boost::property<boost::vertex_distance_t,unsigned int,de::audi::scenetree::VertexContainer>>::type,boost::detail::retag_property_list<boost::edge_bundle_t,GeoTrafo::cPose>::type,boost::no_property,boost::listS>::config::vertex_ptr , Vertex=boost::adjacency_list_traits<boost::listS,boost::listS,boost::bidirectionalS>::vertex_descriptor, T=std::allocator<boost::detail::adj_list_gen<boost::adjacency_list<boost::listS,boost::listS,boost::bidirectionalS,boost::property<boost::vertex_distance_t,unsigned int,de::audi::scenetree::VertexContainer>,GeoTrafo::cPose>,boost::listS,boost::listS,boost::bidirectionalS,boost::detail::retag_property_list<boost::vertex_bundle_t,boost::property<boost::vertex_distance_t,unsigned int,de::audi::scenetree::VertexContainer>>::type,boost::detail::retag_property_list<boost::edge_bundle_t,GeoTrafo::cPose>::type,boost::no_property,boost::listS>::config::vertex_ptr >::value_type, V=boost::adjacency_list_traits<boost::listS,boost::listS,boost::bidirectionalS>::vertex_descriptor ] and [ OutEdgeListS=boost::listS, VertexListS=boost::listS, DirectedS=boost::bidirectionalS ] Diese Konvertierung erfordert einen reinterpret_cast-Operator oder eine Typumwandlung im C- oder Funktionsformat For example index and property map definition with bundled property: typedef unsigned int VertexID; class SCENETREELIB_API VertexContainer { public: VertexID m_idVertex; } typedef property_map<BGLGraph, VertexID VertexContainer::*>::type IndexMap; // Build the property map IndexMap im = get(&VertexContainer::m_idVertex, graphIn); std::vector<BGLVertexDescriptor> p(num_vertices(graphIn)); Any further suggestions? greetz Manuel -- Ist Ihr Browser Vista-kompatibel? Jetzt die neuesten Browser-Versionen downloaden: http://www.gmx.net/de/go/browser

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using boost with Visual Studio 2005
by Natalie Happenhofer 12 Nov '08

12 Nov '08

Hi! I need to use boost with Microsoft Visual Studio C++ 5.0, but I get the error D:\Boost\boost_1_36_0\boost/config/compiler/visualc.hpp(186) : fatal error C1189: #error : "Compiler not supported or configured - please reconfigure" Is there any possibility that it might work if I changed the configure files for boost? If so, Which file do I have to alter and how? If not.. I need to use boost\multi_array, is there any older version of boost which works for my Visual Studio 5.0 and includes the multi_array class? I´d be very grateful for advice, thx, Natalie Happenhofer _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/

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[boost-users][bind, signal] binding a weak_ptr?
by Igor R 12 Nov '08

12 Nov '08

Hello, When using shared_ptr, we usually take an advantage of weak_ptr to break the "cycles". But sometimes the "forth connection" between the objects is by means of shared_ptr, while the "back connection" is by means of signal-slot connection. Like this: shared_ptr<Class1> o1; shared_ptr<Class2> o2; o1->someSignal_->connect(bind(&Class2::responder, o2)); // besides, o2 has a shared_ptr to o1 I'd like this signal-slot to be "weak", i.e. instead of "bind(&Class2::responder, o2)" I wish it could be "bind(&Class2::responder, weak_ptr(o2))" - which is illegal. Of course, I can define (and connect to the signal) a wrapping functor that would store a weak_ptr to the wrapped object, and would try to lock it in operator(). But probably boost already have some off-the-shelf solution for this issue? Thanks!

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[BGL] brandes betweenness vs networkx
by Matthew Galati 12 Nov '08

12 Nov '08

What is the rationale behind division by 2 for the undirected Brandes calcuation? Also, can someone show me how to get the weighted version of brandes? The following code calculates the unweighted version. #include "boost/graph/adjacency_list.hpp" #include "boost/graph/graph_utility.hpp" #include "boost/graph/betweenness_centrality.hpp" using namespace boost; int main(int argc, char * argv[]){ const int N = 6; typedef property < edge_weight_t, double > WeightMap; typedef property < vertex_centrality_t, double > CentralityMap; typedef adjacency_list<vecS, vecS, undirectedS, CentralityMap, WeightMap> UndirectedGraph; UndirectedGraph g(N); add_edge(0, 1, 3, g); add_edge(0, 2, 2, g); add_edge(0, 3, 6, g); add_edge(0, 4, 4, g); add_edge(1, 3, 5, g); add_edge(1, 5, 5, g); add_edge(2, 4, 1, g); add_edge(3, 4, 2, g); add_edge(3, 5, 1, g); add_edge(4, 5, 4, g); print_graph(g); brandes_betweenness_centrality(g, get(vertex_centrality,g), get(edge_weight, g) ); boost::property_map<UndirectedGraph, vertex_centrality_t>::type b = get(vertex_centrality, g); graph_traits < UndirectedGraph >::vertex_iterator vi, vi_end; for (tie(vi, vi_end) = vertices(g); vi != vi_end; ++vi) { printf("BRANDES centr[%d] = %g\n", *vi, b[*vi]); } } Boost/graph gives the following: 0 <--> 1 2 3 4 1 <--> 0 3 5 2 <--> 0 4 3 <--> 0 1 4 5 4 <--> 0 2 3 5 5 <--> 1 3 4 I AM HERE dispatch2 CALLING UNWEIGHTED BRANDES centr[0] = 1.83333 BRANDES centr[1] = 0.333333 BRANDES centr[2] = 0 BRANDES centr[3] = 0.666667 BRANDES centr[4] = 1.83333 BRANDES centr[5] = 0.333333 While networkx gives: http://networkx.lanl.gov/reference/generated/networkx.betweenness_centralit… {0: 3.6666666666666665, 1: 0.66666666666666663, 2: 0.0, 3: 1.3333333333333333, 4: 3.6666666666666661, 5: 0.66666666666666663} So, boost is exactly 1/2 of networkx's solution. Is one version wrong? Or is this some kind of convention that boost and networkx disagree on? Thanks, Matt

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Fw: [signals2][review] The review of the signals2library (formerly thread_safe_signals) begins today, Nov 1st
by vicente.botet 12 Nov '08

12 Nov '08

forwarding to boost(a)list.boost.org ----- Original Message ----- From: "Frank Mori Hess" <frank.hess(a)nist.gov> To: <boost-users(a)lists.boost.org> Sent: Monday, November 10, 2008 4:25 PM Subject: Re: [Boost-users] [signals2][review] The review of the signals2library (formerly thread_safe_signals) begins today, Nov 1st > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On Monday 10 November 2008 05:30 am, Fabio Fracassi wrote: >> * Automatic connection management: >> This is great, even if it wasn't required for thread safety reasons, I >> prefer using shared_ptr based connection tracking over boost::trackable, >> since it enables me to track (and thus safely use) 3d party classes. > > One issue that has occurred to me with the shared_ptr use, is it requires > the > use of boost::shared_ptr. So, if someone's program is instead always > using > std::shared_ptr for example, that could be a bit of an annoyance. One > solution would be to make it support anything that provides the > shared_ptr/weak_ptr interface by making slotN::track() a template and > doing > some type erasure inside the library. Unfortunately, neither the > shared_ptr > or weak_ptr interface provides a typedef for it's associated > weak_ptr/shared_ptr type, and I would need to get both the weak_ptr and > shared_ptr type from the single argument passed to slotN::track(). So, > I'd > have to add some template traits classes that could determine if a class > is a > shared_ptr or weak_ptr, and the type of its associated weak_ptr or > shared_ptr. I could provide specializations of the traits classes for the > shared_ptr/weak_ptr implementations I know about (boost, std, tr1, etc), > otherwise the user would have to provide a specialization. > > The other option would be to add yet another template parameter to the > signal > class for the shared_ptr type, but it has too many parameters already. > >> I haven't done a comparison, but the Docu seems to be mostly the same as >> the original signals. Thus for the usecases that are documentated there >> its high quality, but I miss the same for the new features: >> >> * I miss tutorial quality examples for some of the new features: >> ** Howto use boost::threads with signals2 >> ** Howto use postconstructors/predestructors (and what for?) >> ** An example using signal::extended_slot_type > > Yes, it seems clear I'm not going to get away with the minimal porting job > I > did on the Boost.Signals documentation. Speaking of the postconstructor > stuff, I'm not entirely happy with the deconstruct_ptr interface. Maybe > I'd > like it better if it looked more like make_shared/allocate_shared and had > a > helper for declaring it as a friend, as has been recently proposed on > boost-devel for make/allocate_shared. > >> * The class reference pages (e.g. >> doc/html/boost/signals2/connection.html) are missing from the TOC > > That's just how boostbook does it. The TOC links to the header synopsis, > and > the class names in the header synopsis link to the class reference pages. > I > do remember having a little trouble navigating through it myself initially > though. > >> * Do the portable syntax examples need to be supported (... so >> prominently)? Maybe they could be moved to an appendix? > > I agree they don't, although most of the other additions to the docs > people > have been asking for would seem to take precedence. > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.6 (GNU/Linux) > > iD8DBQFJGFJu5vihyNWuA4URAsUpAJ0TVggC9K9Zy76p1AxtfnxA1VomsgCeL1Z8 > TrXkG8+WbKkBDS7SiUF+0+Y= > =zb8l > -----END PGP SIGNATURE----- > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

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Boost Static Linking Woes
by Brian Dawn 12 Nov '08

12 Nov '08

Hello everyone! I current have the latest boost compiled with bjam, I have a complete build. I am also using MS Visual C++ 2008 express. So far everything works out perfectly, however when the compiled application was run on another computer I got a classic "This application has failed to start because its side-by-side configuration is incorrect." error. So instead of generating a multithreaded DLL I changed it to just multithreaded. However I then got this error message "Mixing a dll boost library with a static runtime is a really bad idea...". So it seems autolink wasn't finding my libraries. In order to get around this I then disabled the boost autolink feature and linked to the static libraries manually. The application was then able to compile correctly but I then received a runtime error complaining about a corrupt heap, my code ran just fine before. Is there any way I can get around this? I would like my application to be multithreaded rather than multithreaded DLL to avoid the side-by-side configuration error when distributing my exe. Thanks, Brian.

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Re: [Boost-users] boost 1.37, tr1 and gcc 4.x
by Sergey Sadovnikov 12 Nov '08

12 Nov '08

Hello, Acsoft. Tuesday, November 11, 2008 at 6:24:51 PM you wrote: > Hello, > I am using boost 1.37 and gcc 4.3.2. > I am getting a very nasty error when I mix up boost headers and tr1 > headers in one compilation unit. Some time ago I encountered the same problem with VS 2008 SP1 and shared_ptr. Solution which I found was not to expose boost namespace into global namespace. This is ugly but works. -- Best Regards, Sergey mailto:ssadovnikov@egopolis.com

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