January 2004 - Boost-users - lists.preview.boost.org

RE: [Boost-users] Weird freeze with boost::thread on Win2K
by Yarwood, Martin (UK) 12 Jan '04

12 Jan '04

Have you done a sleep(0) or similar to give up thread control so the threading control gives the other one some processor time? > -----Original Message----- > From: Viktor Lundström [mailto:d99-vlu@nada.kth.se] > Sent: 09 January 2004 10:47 > To: boost-users(a)lists.boost.org > Subject: [Boost-users] Weird freeze with boost::thread on Win2K > > > *** WARNING *** > > This mail has originated outside your organization, > either from an external partner or the Global Internet. > Keep this in mind if you answer this message. > > Hi! > I'm using boost::thread on MSVC6/Win2k. > When I start two processes which both use boost::thread, > the second process waits for up to a minute or two before starting. > The process doesn't bug, it just hangs there for a while and then > starts. > Is this a known problem? > > Regards, > Viktor Lundström > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > > ******************************************************************** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. ********************************************************************

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Weird freeze with boost::thread on Win2K
by Viktor Lundström 10 Jan '04

10 Jan '04

Hi! I'm using boost::thread on MSVC6/Win2k. When I start two processes which both use boost::thread, the second process waits for up to a minute or two before starting. The process doesn't bug, it just hangs there for a while and then starts. Is this a known problem? Regards, Viktor Lundström

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NEWBIE QUESTIONS ABOUT BGL
by Hugues Joly 09 Jan '04

09 Jan '04

Hi, I've read most of the online documentation about the Boost Graph Library and I've tried a few examples but some questions remain unanswered: Properties: - Once we have a property map for vertices or edges, do we have to assign a value to each vertex (or edge) of the graph? (My preliminary tests tell me that we have to.) - Is the graph the only mean to iterate through all the elements of a property map that it owns? - What is the difference between a graph and a property graph: when would we choose to use a graph interface instead of a property graph? - How can I attach a local property to an element of a subgraph and still have the original property unchanged for the corresponding element on the parent graph? (At the time beeing it seems impossible to do so.) - How can I define a custom property within a specific namespace? PROBLEMS: It seems that there are compilers' limitations regarding the number of properties (and their value type) that can be attached to an adjacency_list (at least with CodeWarrior). Thanks in advance. __________________________________________________________ Lèche-vitrine ou lèche-écran ? magasinage.yahoo.ca

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MAKING A SEARCHABLE ARCHIVE OF THE boost-users' MAILING LIST
by Hugues Joly 09 Jan '04

09 Jan '04

Hi, I think that a searchable archive would be a big help in providing newcomers with answers on basic topics. At least, a downloadable archive would do the job. Who could take care of that? __________________________________________________________ Lèche-vitrine ou lèche-écran ? magasinage.yahoo.ca

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RE: [Boost-users] MAKING A SEARCHABLE ARCHIVE OF THE boost-users' MAILINGLIST
by John Wilkinson 09 Jan '04

09 Jan '04

This list is available through Gmane (http://www.gmane.org), which is an NNTP interface for mailing lists. They have an archive of about 5100 messages for this list. Other boost lists are also available (http://news.gmane.org/index.php?prefix=gmane.comp.lib.boost). John -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Hugues Joly Sent: Friday, January 09, 2004 10:53 AM To: boost-users(a)lists.boost.org Subject: [Boost-users] MAKING A SEARCHABLE ARCHIVE OF THE boost-users' MAILINGLIST Hi, I think that a searchable archive would be a big help in providing newcomers with answers on basic topics. At least, a downloadable archive would do the job. Who could take care of that? __________________________________________________________ Lèche-vitrine ou lèche-écran ? magasinage.yahoo.ca _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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Building from MSVC
by Phil Hornby 09 Jan '04

09 Jan '04

Okay I know that there is this nice build tool called bjam - but I am a simple man and like using my nice friendly IDEs....so I was wondering if anyone has an MSVC 7.1 project that they have set up to build the libraries, i.e. the dlls that bjam produces? If so can I grab a copy as my first quick try didn't work...but then I only put 5 mins into it... -- Phil "Requirements - what are they I just hack something together that does what I think they want" ;)

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boost::signals + pthreads = seg fault on Linux
by Uwe Sander 09 Jan '04

09 Jan '04

Hi, I have a problem with boost::signals when I try to use them in multi threaded projects. I have tried gcc 3.2.3 and gcc 3.3.2, on two different Linux boxes, with the same result. The following test program works fine w/o threads and crashes after the 17th call to connect if I add -pthread to the compile command: #include <boost/signal.hpp> void on_do_something () { } int main () { boost::signal<void ()> sig; for (int i = 0; i < 100; ++i) sig.connect (&on_do_something); } I have tried electric fence, then it crashes immediatly in the first call to pthread_mutex_init, but I can't see any reason for that crash with gdb. Once again, even with electric fence, everything works fine w/o threads, so I see no mem corruption or any reason why it should not work _with_ threads. Any idea? Thanks Uwe

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Test library fails to link on OS X 10.3 Panther
by Scott Lamb 08 Jan '04

08 Jan '04

I've downloaded boost-1.30.2 and boost-jam-3.1.7 to my PowerBook running Mac OS X 10.3 (Panther). After installing boost-jam without problems, I'm attempting to build the boost test library as follows: $ uname -a Darwin spiff.local 7.2.0 Darwin Kernel Version 7.2.0: Thu Dec 11 16:20:23 PST 2003; root:xnu/xnu-517.3.7.obj~1/RELEASE_PPC Power Macintosh powerpc $ gcc_select Current default compiler: gcc version 3.3 20030304 (Apple Computer, Inc. build 1495) $ cd boost-1.30.2/libs/test/build $ bjam -sTOOLS=darwin It chugs for a while, but gets link failures. It gives a warning about undefined symbols and dies. The symbols are cpp_main, test_main, and init_unit_test_suite. It doesn't really look like this is a fatal error - it says it's just a warning and that prebinding is disabled. And I think these are to be defined by the user of the library, so isn't it normal for them to be undefined here? In any case, this is the only error I see other than bjam complaining that the command failed. Any ideas how to fix it? Thanks, Scott Lamb The first of the failed commands did this: darwin-Link-DyLib-action ../../../libs/test/build/bin/libboost_prg_exec_monitor. dylib/darwin/debug/runtime-link-static/shared-linkable-true/ libboost_prg_exec_mo nitor.dylib ld: warning prebinding disabled because of undefined symbols ld: Undefined symbols: cpp_main(int, char**) export DYLD_LIBRARY_PATH ld -dynamic -m -r -d -o "../../../libs/test/build/bin/libboost_prg_exec_moni tor.dylib/darwin/debug/runtime-link-static/shared-linkable-true/ libboost_prg_exe c_monitor.lo" "../../../libs/test/build/bin/libboost_prg_exec_monitor.dylib/dar win/debug/runtime-link-static/shared-linkable-true/execution_monitor.o" "../../. ./libs/test/build/bin/libboost_prg_exec_monitor.dylib/darwin/debug/ runtime-link- static/shared-linkable-true/cpp_main.o" \ && \ c++ -static-libgcc -g -Wl,-dynamic -nostartfiles -Wl,-dylib -Wl,-ldylib1.o -Wl,-dylib_compatibility_version,1.30.2 -W,l-dylib_current_version,1.30.2 -o ". ./../../libs/test/build/bin/libboost_prg_exec_monitor.dylib/darwin/ debug/runtime -link-static/shared-linkable-true/libboost_prg_exec_monitor.dylib" "../../../li bs/test/build/bin/libboost_prg_exec_monitor.dylib/darwin/debug/runtime- link-stat ic/shared-linkable-true/libboost_prg_exec_monitor.lo" \ \ \ && \ rm -f "../../../libs/test/build/bin/libboost_prg_exec_monitor.dylib/darwin/d ebug/runtime-link-static/shared-linkable-true/ libboost_prg_exec_monitor.lo" ...failed darwin-Link-DyLib-action ../../../libs/test/build/bin/libboost_prg_exe c_monitor.dylib/darwin/debug/runtime-link-static/shared-linkable-true/ libboost_prg_exec_monitor.dylib...

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Problems compiling Boost.Function using gcc-3.3 on MacOS X (Jaguar)
by Jens Lindblad 08 Jan '04

08 Jan '04

Hello, I am trying to move a project of mine from gcc-3.1 to gcc-3.3 under MacOS X Jaguar. I'm using Apple's developer tools with the December 2002 updater which included gcc-3.3. Everything compiles just fine under 3.1 but I really need to use precompiled headers which does not work very well. I have managed to precompile my prefix header using 3.3 and I can also compile most of my source files using it. However, as soon as the compiler encounters a source file where Boost.Function is used I get an internal compiler error. So, I wrote a small program (included at the end of this email) which demonstrates the error. It works just fine under 3.1 but not under 3.3. Using preferred or portable syntax makes no difference. Has anyone else experienced this problem, or has it been fixed in Xcode? Perhaps I'm just doing something wrong? I'd really like to know before I file a bug. (I did a couple of searches on lists.boost.org but didn't find anything of interest.) Thanks in advance, Jens ------------------------------------------------------------ #include <iostream> #include <boost/function.hpp> void test( int x ) { std::cout << x << std::endl; } int main( int argc, char* argv[] ) { boost::function<void (int)> __test(test); __test(5); return 0; } ------------------------------------------------------------ Which gives the following error: /Development/Libraries/boost-1.30.2/boost/function/ function_template.hpp: In member function `void boost::function1<R, T0, Allocator>::assign_to(FunctionPtr, boost::detail::function::function_ptr_tag) [with FunctionPtr = void (*)(int), R = void, T0 = int, Allocator = std::allocator<void>]': /Development/Libraries/boost-1.30.2/boost/function/ function_template.hpp:432: instantiated from `void boost::function1<R, T0, Allocator>::assign_to(Functor) [with Functor = void (*)(int), R = void, T0 = int, Allocator = std::allocator<void>]' /Development/Libraries/boost-1.30.2/boost/function/ function_template.hpp:293: instantiated from `boost::function1<R, T0, Allocator>::function1(Functor, typename boost::detail::function::enable_if<boost::type_traits::ice_not<boost::is _same<Functor, int>::value>::value, int>::type) [with Functor = void (*)(int), R = void, T0 = int, Allocator = std::allocator<void>]' /Development/Libraries/boost-1.30.2/boost/function/ function_template.hpp:602: instantiated from `boost::function<R ()(T0), Allocator>::function(Functor, typename boost::detail::function::enable_if<boost::type_traits::ice_not<boost::is _same<Functor, int>::value>::value, int>::type) [with Functor = void (*)(int), R = void, T0 = int, Allocator = std::allocator<void>]' test.cpp:12: instantiated from here /Development/Libraries/boost-1.30.2/boost/function/ function_template.hpp:451: internal compiler error: in c_expand_expr, at c-common.c:4752 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://developer.apple.com/bugreporter> for instructions.

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Using regex with Visual Studio. NET 2003
by Hans Merkl 07 Jan '04

07 Jan '04

Hi, I am porting a project that uses regex from Visual Studio 6 to Visual Studio .NET 2003. It works fine with VS6, but now I am getting linker errors: TestConsole.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall boost::reg_expression<char,class boost::regex_traits<char>,class std::allocator<char> >::~reg_expression<char,class boost::regex_traits<char>,class std::allocator<char> >(void)" (__imp_??1?$reg_expression@DV?$regex_traits@D@boost@@V?$allocator@D@std@@@ boost@@QAE@XZ) referenced in function _main TestConsole.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall boost::reg_expression<char,class boost::regex_traits<char>,class std::allocator<char> >::reg_expression<char,class boost::regex_traits<char>,class std::allocator<char> >(char const *,unsigned int,class std::allocator<char> const &)" (__imp_??0?$reg_expression@DV?$regex_traits@D@boost@@V?$allocator@D@std@@@ boost@@QAE@PBDIABV?$allocator@D@std@@@Z) referenced in function _main I have changed the C-runtime library settings, I have set BOOST_REGEX_STATIC_LINK to make sure I link against the static version, but nothing worked. Looking at the error messages, it seems I am still linking against the DLL version (dllimport). Does anybody have regex working with .NET 2003? Thanks Hans Merkl

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RE: [Boost-users] Spirit Example does not build
by rip snorta 06 Jan '04

06 Jan '04

Hi Ben, >From: "Ben Hutchings" <ben.hutchings(a)businesswebsoftware.com> >Reply-To: Boost Users mailing list <boost-users(a)lists.boost.org> >To: "Boost Users mailing list" <boost-users(a)lists.boost.org> >Subject: RE: [Boost-users] Spirit Example does not build >Date: Tue, 6 Jan 2004 16:27:54 -0000 > > >This is a problem with the standard library implementation. Although >VC++ 6 has some support for template member functions, the library that >comes with it was written for an earlier version that did not and was >not updated to include template member functions. So it does not >define the constructor template for std::deque that takes two iterators >(though it does define a constructor that takes two const T * pointers, >where T is the element type). > >I think the example will work if you install STLPort or Dinkumware's >newer library as a (partial) replacement for VC++ 6's standard library. >_______________________________________________ This was one of the next things I was thinking of doing. I just wanted to see if there was anything simple I was missing before I installed one of the other STLs. Looks like STLPort is the go then! cheers John _________________________________________________________________ Worried about inbox overload? Get MSN Extra Storage now! http://join.msn.com/?PAGE=features/es

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RE: [Boost-users] Spirit Example does not build
by Ben Hutchings 06 Jan '04

06 Jan '04

John <ripsnorta(a)operamail.com> wrote: > I have been trying to get one of the spirit examples, regex_convert > to build using VC6, service pack 5. I am using boost 1-30.2 for this > exercise. I get the following error message. > > error C2664: '__thiscall std::deque<char,class std::allocator<char> > >::std::deque<char,class std::allocator<char> >(unsigned int,const > char&,const class std::allocator<char> &)' That means a constructor for std::deque. > : cannot convert parameter 1 from 'class std::istreambuf_iterator< > char,struct std::char_traits<char> >' to 'unsigned int' > No user-defined-conversion operator available that can > perform this conversion, or the operator cannot be called > > I was wondering if this was a known issue, or if there was something > else that I needed to do. This is a problem with the standard library implementation. Although VC++ 6 has some support for template member functions, the library that comes with it was written for an earlier version that did not and was not updated to include template member functions. So it does not define the constructor template for std::deque that takes two iterators (though it does define a constructor that takes two const T * pointers, where T is the element type). I think the example will work if you install STLPort or Dinkumware's newer library as a (partial) replacement for VC++ 6's standard library.

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Problem Building boost for cygwin g++ with stlport on WinXP
by Markus Ruettimann 06 Jan '04

06 Jan '04

Hi all I'm an enthusiastic user of boost since quite a long time. I used MSVC6.0 so far. How ever, I changed to cygwin g++ 3.3.1 for project reasons. I have succesfuly built the latest STLPort version (4.6) and I also use it successfully. How ever, I am not able to build the toolset gcc-stlport. There are errors in the threadding lib and elsewhere, and such ugly things as "to long path names" errors in the console. Does anybody know how to build this toolset and link them together as one static lib? I use boost-1.30.2 with cygwin g++ 3.3.1 on winXP professional. PS: When I build the bjam stuff, what builds without any errors, it uses the MSVC compiler (the output it creates looks like this). Is this a problem? Thanks for your help Markus. -- Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/

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Spirit Example does not build
by John 06 Jan '04

06 Jan '04

Hi, I have been trying to get one of the spirit examples, regex_convert to build using VC6, service pack 5. I am using boost 1-30.2 for this exercise. I get the following error message. error C2664: '__thiscall std::deque<char,class std::allocator<char> >::std::deque<char,class std::allocator<char> >(unsigned int,const char &,const class std::allocator<char> &)' : cannot convert parameter 1 from 'class std::istreambuf_iterator<char,struct std::char_traits<char> >' to 'unsigned int' No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called I was wondering if this was a known issue, or if there was something else that I needed to do. cheers John

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Longest path in a DAG using BGL
by Ramprasad Natrajan 03 Jan '04

03 Jan '04

Hi, I am trying to find the longest path in a DAG using the BGL Dijkstra function. The call I used is: dijkstra_shortest_paths(hcg, s, &p[0], &d[0], weightmap, indexmap, std::greater<int>(), closed_plus<int>(), 0,MAXINT,dijkstra_visitor<null_visitor>()); where MAXINT is set high enough to be greater than the maximum path length. This doesn't seem to do the trick. Any suggestions? Thanks a real lot, Ram _________________________________________________________________ Feeling like a vacation? Then you are in the right place. http://www.msn.co.in/Travel/ Get the best travel deals here!

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how to get started? (not in documentation)
by Tom Weber 01 Jan '04

01 Jan '04

Hello, I downloaded boost today so regard me as a newbie. Boost seems great, but the documentation doesn't mention how I should install boost on my system (redhat 9), and how to link against the built libraries. Sure I can include it in every project (though it's huge!), and make the makefiles link into strange locations such as libs/test/build/bin/libboost_unit_test_framework.a/gcc/debug/runtime-link-static/threading-single/libboost_unit_test_framework.a Is there an easier way? Why aren't packages like boost-[devel-]VERSION.PLATFORM.rpm made? Why aren't all built libraries put in the same directory, with a simple path name? Why isn't the thread library built statically? Is putting a "lib" section with BOOST_THREAD_BUILD_STATIC=1 in the Jamfile a legal fix? (seems to work) Also... I think boost should have a network library. Can anyone recommend a platform-independent network library? I'm thankful for any answer... -- Cheers, Tom Weber http://www.dd.chalmers.se/~np98towe/

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