July 2005 - Boost-users - lists.preview.boost.org

1.33 pointer to object serialization
by Chris Coleman 07 Aug '05

07 Aug '05

Hi, I'm having trouble with serializing an object through a pointer to it. The code below works in 1.32, but in 1.33 it gives the errors below. I am using Mac OS X 10.4.2, gcc 4.0. I've had a look at the headers, but my template programming isn't good enough to make too much sense of them. It seems that there is a check to ensure T is not a pointer on line 549 of oserializer.hpp, which is the reason the static assert is failing? Is it correct that objects shouldn't be serializable by pointers to them, or not? Cheers Chris gps_position* p_g = new gps_position(35, 59, 24.567f); oa << p_g; // causes the error's below g++ -o test test.cpp -lboost_serialization-d-1_33 /usr/local/include/boost/archive/detail/oserializer.hpp: In function 'void boost::archive::save(Archive&, T&) [with Archive = boost::archive::text_oarchive, T = gps_position*]': /usr/local/include/boost/archive/basic_text_oarchive.hpp:78: instantiated from 'void boost::archive::basic_text_oarchive<Archive>::save_override(T&, int) [with T = gps_position*, Archive = boost::archive::text_oarchive]' /usr/local/include/boost/archive/detail/interface_oarchive.hpp:85: instantiated from 'Archive& boost::archive::detail::interface_oarchive<Archive>::operator<<(T&) [with T = gps_position*, Archive = boost::archive::text_oarchive]' hash_test.cpp:130: instantiated from here /usr/local/include/boost/archive/detail/oserializer.hpp:560: error: invalid application of 'sizeof' to incomplete type 'boost::STATIC_ASSERTION_FAILURE<false>' This message has been checked for viruses but the contents of an attachment may still contain software viruses, which could damage your computer system: you are advised to perform your own checks. Email communications with the University of Nottingham may be monitored as permitted by UK legislation.

4 14

Linker Problems with VC 7.1/ Boost 1.32 / Stlport 4.61
by Adrian Grigore 02 Aug '05

02 Aug '05

Hi, I've been happily using Boost 1.32 with Visual C++ 7.1 for a few months. Now I'd like to switch to STLPort, but can’t get my project to compile with STLPort due to linker errors (LNK2019 and LNK2001) in every boost library I use (signals, filesystem, thread). First I installed STLPort and to make sure that it is working properly with a dummy (boostless) project. Then I re-compiled boost with the stlport toolset: bjam "-sTOOLS=vc-7_1-stlport" "-sSTLPORT_PATH=C:\Programme\Microsoft Visual Studio .NET 2003\add-ons" "-sSTLPORT_VERSIONS=4.6.1" "-sPYTHON_ROOT=c:/Programme/Python24" install Last but not least, I recompiled my project (multithreaded, static runtime) which is using boost. I got 9 errors such as these: WxNonogram error LNK2001: unresolved external symbol "public: __thiscall boost::signals::detail::signal_base::signal_base(class boost::function2<bool,class boost::any,class boost::any,class _STL::allocator<class boost::function_base> > const &,class boost::any const &)" (??0signal_base@detail@signals@boost@@QAE@ABV?$function2@_NVany@boost@@V12@V?$allocator@Vfunction_base@boost@@@_STL@@@3@ABVany@3@@Z) WxNonogram error LNK2019: unresolved external symbol "bool __cdecl boost::filesystem::native(class _STL::basic_string<char,class _STL::char_traits<char>,class _STL::allocator<char> > const &)" (?native@filesystem@boost@@YA_NABV?$basic_string@DV?$char_traits@D@_STL@@V?$allocator@D@2@@_STL@@@Z) referenced in function "public: virtual bool __thiscall CMyWxApp3_wxstaticApp::OnInit(void)" (?OnInit@CMyWxApp3_wxstaticApp@@UAE_NXZ) I also defined BOOST_LIB_DIAGNOSTIC to see which libraries are linked against to. Strangely enough, it seems to link to the correct libraries as I got messages such as these: "Linking to lib file: libboost_signals-vc71-mt-sgdp-1_32.lib" and it still complains about signals not being resolved after linking. Unfortunately I do not have a clue on how to proceed. Any help would be appreciated. Thanks! :-) - Adrian

2 3

Re: [Boost-users] shared_array EXC_BAD_ACCESS
by Christopher Hunt 02 Aug '05

02 Aug '05

>> When UTFStringHolder is instantiated, I get an EXC_BAD_ACCESS and my >> stack trace shows that pthread_mutex_init is being called. Here's the >> complete stack trace: >> >> #0 0x90012730 in _pthread_mutex_init >> #1 0x00088424 in boost::detail::lightweight_mutex::lightweight_mutex() >> at lwm_pthreads.hpp:47 > > These things usually happen when you have inconsistent definitions of > BOOST_HAS_THREADS in the source files or libraries that form your > program. > Does the code still fail when you try it as a single self-contained > source > file? If it does, can you post a minimal example that fails? Unfortunately it is not reproducible in a single self-contained file... which is interesting isn't it... Also, I've managed successfully to have a shared_array member as part of another class's instantiation. The only difference that I see is the timing of when they're instantiated. Could it be anything to do with the initialisation of my pthread environment? (what initialises pthreads?) I'll do some experiments around this. If it is of interest, this is all being done in a Mac OS X Cocoa Objective-C environment. Cocoa likes to know when it is going multi-threaded (http://developer.apple.com/documentation/Cocoa/Conceptual/ Multithreading/articles/CocoaDetaching.html) and I do let it know, but maybe I should let it know earlier. Thanks for your help. I'll do some more experimentation around the timing of instantiation. Cheers, -C

2 4

boost python + vc 7.1
by Uwe Schmitt 01 Aug '05

01 Aug '05

Hi, I have a problem with compiling an application using boost python. I use Microsofts VC++ version 7.1. The following lines describe my problem: cl /EHsc /TP /IC:\Python24\include /ID:\home\Administrator\svn_local\public.procoders.net\pcsvm /IC:\boost\include\boost-1_32 /c pythonAdapter.cpp /FopythonAdapter.obj pythonAdapter.cpp C:\Boost\include\boost-1_32\boost\python\operators.hpp(209) : fatal error C1001: INTERNER COMPILERFEHLER (Compilerdatei 'msc1.cpp', Zeile 2701) Whlen Sie im Men '?' von Visual C++ den Befehl 'Software Service', oder ffnen Sie die Hilfedatei fr den Software Service, um weitere Informationen zu erhalten Any hints what to do ? Greetings, Uwe

2 1

Include boost in software distribution?
by Joseph Turian 01 Aug '05

01 Aug '05

Hi, I'm packaging some software for distribution, and the software depends upon the 'program_options' library. I don't want to assume that the user has boost installed, or ever jam. So I was wondering about the potential for automagically building and using the 'program_options' library if it is not already present on the user's system. I would include the source files in libs/program_options/, and write a small Makefile for it. I would also include all the Boost headers. Is this sufficient, even though it wouldn't run the Boost configure script to determine system-specific settings? Can you see any problems in building this library without doing a full Boost install? Thanks! Joseph -- http://www.cs.nyu.edu/~turian/

4 5

Problem using boost::bind and ecore_ipc from Enlightenment
by Offlein 31 Jul '05

31 Jul '05

Hi all, i just subscribed to this List ;) I have a Problem with C++ Member Functions and Pointers to this Member Functions so that they fit into a Function with take a normal Function. I guess i'm a Newbie, otherwise i should have already solved it, i think. ;) I want to use IPC Stuff from Ecore. But before you can make use of ecore_ipc you must initialize it, as far as i can see. I atached 4 Files, where i build a little Scenario: 1. Example.cpp // The Main Program 2. Testclass.hpp 3. Testclass.cpp 4. Makefile // Perhaps you must adjust some of the Variables I commented the important Points in the Code again. So i must first call ecore_ipc_init() // Testclass Line 68 and must supply 3 Functions to ecore for handling Events 1. A Function that is called, when a new IPC Server is added 2. A Function that is called, when a IPC Server is deleted 3. A Function that is called, when some Message is sent Namely: ecore_event_handler_add( ECORE_IPC_EVENT_SERVER_ADD, ipc_server_add, NULL ); ecore_event_handler_add( ECORE_IPC_EVENT_SERVER_DEL, ipc_server_del, NULL ); ecore_event_handler_add( ECORE_IPC_EVENT_SERVER_DATA, ipc_server_data, NULL ); "ipc_server_add", "ipc_server_del" and "ipc_server_data" are the functions that are available outside the Class Testclass The Example Program as it is compiles and i can start it, the ecore_pic_init() succeds the 3 Functions get "registered" but this 3 submitted Functions are standing outside my Testclass, but my Target is to have they inside my Testclass. That's my Problem, i didn't get the Clue to give these MemberFunctions to these 3 Functions: ecore_event_handler_add( ECORE_IPC_EVENT_SERVER_ADD, ipc_server_add, NULL ); ecore_event_handler_add( ECORE_IPC_EVENT_SERVER_DEL, ipc_server_del, NULL ); ecore_event_handler_add( ECORE_IPC_EVENT_SERVER_DATA, ipc_server_data, NULL ); I tried Things like that, but that didn't helped me: ecore_event_handler_add( ECORE_IPC_EVENT_SERVER_DEL, boost::bind( boost::type<int>(), &Testclass::ipc_server_add ), NULL ); ecore_event_handler_add( ECORE_IPC_EVENT_SERVER_DEL, boost::bind( boost::type<int>(), &Testclass::ipc_server_add, _1, _2, _3 ), NULL ); So i want to ask to the Mailinglist in Hope somebody knows how to do this Task in the right Way. ;) Thanks for your help and Greets to all, Christian

1 0

cvs bjam fails to build for vc7
by Serge Skorokhodov 31 Jul '05

31 Jul '05

Hi, The version of bjam from cvs fails to build for vc7 due to the file 'execunix.c: file unistd.h not found'. It is now: ... #if defined(sun) || defined(__sun) #include <wait.h> #endif ... but it used to be: ... #if defined(sun) || defined(__sun) #include <unistd.h> /* need to include unistd.h on sun for the vfork prototype*/ #include <wait.h> #endif ... TIA -- Serge

2 1

Re: [Boost-users] boost::shared_ptr vs. NULL
by Merrill Cornish 31 Jul '05

31 Jul '05

Thore, >>> To set it to 0, use reset(): Thanks. That's what I need. Merrill

1 0

anyone can help me about using regex++
by huatao 31 Jul '05

31 Jul '05

I'm developing a windows application using regex++3.0 to solve regulare expression, but i don't know how to add unicode support to it, anyone can give me some advice about it, thanks a lot.

2 1

boost::shared_ptr vs. NULL
by Merrill Cornish 31 Jul '05

31 Jul '05

I'm running Boost 1.32.0 under MinGW, so NULL is 0 rather than (void*)0. While I understand what smart pointers are all about, this is the first time I've tried converting code with conventional pointers to use smart pointers. My original application had class data members such as Node *mParent; which were initialized to NULL in the class constructor initialization lists. Later, the data members were assigned pointers to real Node objects. In particular, the application needs at various times to detect whether the data member is NULL or a "real" node and to occassionally set real nodes to NULL. OK, now I'm trying to convert to shared_ptrs. So, I have a typedef for notation convenience: typedef boost::shared_ptr<Node> NodePtr; The class data member declaration now looks like NodePtr mParent; but, how do I initialize it to NULL? In the smart pointer world *is* there such a thing as a generic NULL that can be assigned to all smart pointers. Or, will I need something like NodePrt NullNodePtr; // never initialized then assign mParent = NullNodePtr; This would mean that I would been a NullXPtr for every smart pointer type X I have. If that's the way it must be, then OK, but I would like to know how things are supposed to be done. Merrill

2 1