February 2008 - Boost-users - lists.preview.boost.org

date_time with pre and post 2007 US time zones
by Michael Albert 10 Feb '08

10 Feb '08

Greetings! I would like to use boost::date_time to convert between U.S. time zones and GMT, with dates spanning the year-2007 change of rules. There is a "custom time zone", but that takes a Posix string which, if I understand correctly, can't handle both pre- and post-2007 simultaneously. I did see a dst_calc_engine, but there doesn't seem to be a way to connect that to a dst_day_calc_rule, at least not a method standardized in the library. Am I missing something? I guess I could just derive from dst_day_class_rule and override the start_rule_as_string() and stop_rule_as_string() to be something "random"? Thank you in advance. The Boost libraries really are wonderful. (Although I guess us users tend to only write when we hit a wall :-)). Thanks! -Mike

1 0

Boost.Serialization [For MPI] Crashes
by Aydin Buluc 10 Feb '08

10 Feb '08

Hi all, I have been using the serialization library since it is the way to go for communicating whole classes in Boost.MPI. Previously, I didn't have any problems. However, I now experience a strange problem. I have successfully ran all my code in SDSC's Teragrid cluster (A cluster of Itanium processors, running intel-linux), but when I tried to do the same thing in NCSA's cluster (which is similarly composed of Itaniums with same OS) I just can't build serialization library successfully. It says: intel-linux.link.dll bin.v2/libs/serialization/build/intel-linux/release/libboost_serialization-il-1_35.so.1.35.0 OBJREAD Error: Could not create mapping for "bin.v2/libs/serialization/build/intel-linux/release/basic_oarchive.o". icpc: error: problem during multi-file optimization compilation (code 1) Both clusters use the same kernel (2.4.21), same compiler suite (icc 9.1), same architecture, same mpixx (/usr/local/apps/mpich-gm-1.2.6..14b-intel-r2/bin/mpicxx). So, that was a little frustrating. But the fact is that, it creates the multithreaded library (libboost_serialization-il-mt-1_35) even after the error. I gave it a try. Compilation is flawless, but during runtime, main() is even not called [it seg faults immediately].When I debug it, I get the following backtrace: This GDB was configured as "ia64-suse-linux"... (gdb) run Starting program: /home/ac/aydinb/ParSPGEMM/testpar Program received signal SIGSEGV, Segmentation fault. 0x6000000000011ef0 in typeinfo for boost::serialization::detail::extended_type_info_typeid_0 () (gdb) bt #0 0x6000000000011ef0 in typeinfo for boost::serialization::detail::extended_type_info_typeid_0 () #1 0x4000000000103610 in boost::serialization::detail::extended_type_info_typeid_0::less_than(boost::serialization::extended_type_info const&) const (this=0x6000000000018650, rhs=@0x6000000000018910) at libs/serialization/src/extended_type_info_typeid.cpp:22 (gdb) I said fine. Maybe the library was broken due to errors in make / make install. Since we have the same settings, I copied the libraries from SDSC (which works perfectly). Same error, same lines from the gdb :( Any insight why this might be the case? Thanks, -- Aydin

2 1

[boost-users] [errors installing boost from trunk version]
by chun ping wang 10 Feb '08

10 Feb '08

Hi I svn the boost file from the trunk version. I get the following errors. error: default build must be identical in all alternatives error: main target is ./prg_exec_monitor error: with <link>shared <link>static <runtime-link>shared <runtime-link>static <threading>multi <threading>single <variant>debug <variant>release error: differing from previous default build <link>shared <runtime-link>shared < threading>multi <variant>release C:/boost_1_34_1/tools/build/v2/build\targets.jam:450: in build-main-targets from module object(project-target)@35 C:/boost_1_34_1/tools/build/v2/build\targets.jam:317: in main-target from module object(project-target)@35 C:/boost_1_34_1/tools/build/v2/build\targets.jam:375: in find-really from module object(project-target)@35 C:/boost_1_34_1/tools/build/v2/build\targets.jam:408: in object(project-target)@ 35.find from module object(project-target)@35 C:/boost_1_34_1/tools/build/v2\build-system.jam:620: in load from module build-s ystem C:\boost_1_34_1\tools\build\v2/kernel\modules.jam:267: in import from module mod ules C:\boost_1_34_1\tools\build\v2/kernel/bootstrap.jam:132: in boost-build from mod ule C:\boost_1_34_1\boost-build.jam:11: in module scope from module the orginal 1.34.1 works for me.. this doesn't/

1 0

[program_options] crash due to bug in ~variables_map ??
by ope 10 Feb '08

10 Feb '08

Hi, the following drives my mad: ---8<--- class CommandLineOptions { public: CommandLineOptions( int argc, char** argv ); bool option( const std::string& arg ) const; ... private: po::options_description generic_options; po::options_description hidden_options; po::options_description usage_options; po::options_description cmdline_options; po::positional_options_description pos_options; po::variables_map vm; }; --->8--- ---8<--- bool CommandLineOptions::option( const std::string& arg ) const { return vm.count( arg ); } --->8--- int main( int argc, char **argv ) { try { CommandLineOptions cmdline( argc, argv ); running using gdb (on return of main()): Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0xb6f826c0 (LWP 16599)] 0x08051cb2 in std::_Rb_tree<std::string, std::string, std::_Identity<std::string>, std::less<std::string>, std::allocator<std::string> >::_S_right (__x=0x11) at /usr/include/c++/4.2/bits/stl_tree.h:510 510 { return static_cast<_Link_type>(__x->_M_right); } (gdb) bt #0 0x08051cb2 in std::_Rb_tree<std::string, std::string, std::_Identity<std::string>, std::less<std::string>, std::allocator<std::string> >::_S_right (__x=0x11) at /usr/include/c++/4.2/bits/stl_tree.h:510 #1 0x0805291d in std::_Rb_tree<std::string, std::string, std::_Identity<std::string>, std::less<std::string>, std::allocator<std::string> >::_M_erase (this=0xbfb95e48, __x=0x11) at /usr/include/c++/4.2/bits/stl_tree.h:1323 #2 0x0805292c in std::_Rb_tree<std::string, std::string, std::_Identity<std::string>, std::less<std::string>, std::allocator<std::string> >::_M_erase (this=0xbfb95e48, __x=0x80c61b0) at /usr/include/c++/4.2/bits/stl_tree.h:1323 #3 0x0805297b in ~_Rb_tree (this=0xbfb95e48) at /usr/include/c++/4.2/bits/stl_tree.h:592 #4 0x080529cb in ~set (this=0xbfb95e48) at /usr/include/c++/4.2/bits/stl_set.h:94 #5 0x08052b83 in ~variables_map (this=0xbfb95e28) at /usr/local/include/boost/program_options/variables_map.hpp:139 #6 0x0805316d in ~CommandLineOptions (this=0xbfb95cac) at src/eda/workbench/CommandLineOptions.hpp:23 #7 0x080515c3 in main (argc=1, argv=0xbfb961c4) at src/eda/workbench/main.cpp:75 writing main() as: ---8<--- int main( int argc, char **argv ) { try { CommandLineOptions cmdline( argc, argv ); if (cmdline.option( "version" )) { std::cout << ... } running using gdb: Starting program: /home/opetzold/Projects/cpp/eda2/eda -v ... Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0xb6f716c0 (LWP 16883)] 0x08051d7e in std::_Rb_tree<std::string, std::pair<std::string const, boost::program_options::variable_value>, std::_Select1st<std::pair<std::string const, boost::program_options::variable_value> >, std::less<std::string>, std::allocator<std::pair<std::string const, boost::program_options::variable_value> > >::_S_right (__x=0xb0012) at /usr/include/c++/4.2/bits/stl_tree.h:510 510 { return static_cast<_Link_type>(__x->_M_right); } (gdb) bt #0 0x08051d7e in std::_Rb_tree<std::string, std::pair<std::string const, boost::program_options::variable_value>, std::_Select1st<std::pair<std::string const, boost::program_options::variable_value> >, std::less<std::string>, std::allocator<std::pair<std::string const, boost::program_options::variable_value> > >::_S_right (__x=0xb0012) at /usr/include/c++/4.2/bits/stl_tree.h:510 #1 0x08052b9f in std::_Rb_tree<std::string, std::pair<std::string const, boost::program_options::variable_value>, std::_Select1st<std::pair<std::string const, boost::program_options::variable_value> >, std::less<std::string>, std::allocator<std::pair<std::string const, boost::program_options::variable_value> > >::_M_erase ( this=0xbfe2c0a8, __x=0xb0012) at /usr/include/c++/4.2/bits/stl_tree.h:1323 #2 0x08052bae in std::_Rb_tree<std::string, std::pair<std::string const, boost::program_options::variable_value>, std::_Select1st<std::pair<std::string const, boost::program_options::variable_value> >, std::less<std::string>, std::allocator<std::pair<std::string const, boost::program_options::variable_value> > >::_M_erase ( this=0xbfe2c0a8, __x=0xb6fceb2c) at /usr/include/c++/4.2/bits/stl_tree.h:1323 #3 0x08052bfd in ~_Rb_tree (this=0xbfe2c0a8) at /usr/include/c++/4.2/bits/stl_tree.h:592 #4 0x08052c4d in ~map (this=0xbfe2c0a8) at /usr/include/c++/4.2/bits/stl_map.h:94 #5 0x08052cb6 in ~variables_map (this=0xbfe2c0a0) at /usr/local/include/boost/program_options/variables_map.hpp:139 #6 0x0805327f in ~CommandLineOptions (this=0xbfe2bf24) at src/eda/workbench/CommandLineOptions.hpp:23 #7 0x0805170a in main (argc=2, argv=0xbfe2c444) at src/eda/workbench/main.cpp:75 Each time it crash in ~variables_map. Is it a bug?? I'm using gcc-Version 4.2.3 20080114 (prerelease) (Debian 4.2.2-7) Thanks, Olaf

2 3

Unresolved symbol in boost::filesystem lib with MS VC++ 2005 Pro
by Noud de Beijer 08 Feb '08

08 Feb '08

Hi all, I’m using boost version 1.34.1 (downloaded from http://www.boost-consulting.com/) with Visual C++ 2005 Professional. Everything worked fine (even boost::filesystem) until I started using boost::filesystem::directory_iterator. I’m trying to compile the example below and get a unresolved symbol: "unsigned int boost::filesystem::detail::not_found_error". *) Of course, I’m linking against the boost filesystem library (if I don’t I get even more unresolved symbols). *) I do define BOOST_ALL_NO_LIB but if I don’t I still get the unresolved symbol. *) Under Linux the same example compiles, links and runs fine! *) I checked and the symbol exists in the library. *) I’m using the correct runtime *) If I comment out the boost::filesystem::directory_iterator line (so only boost::filesystem::exists()) then the example compiles, links, and runs fine! Can anybody point me in the right direction? Is this a problem with my Visual Studio setup? Or is this a problem in the boost consulting stuff? Regards, Noud <code> #include "boost/filesystem.hpp" #include <string> int main() { std::string myDirString="C:\\"; boost::filesystem::exists(myDirString); boost::filesystem::directory_iterator myIter(myDirString); return 0; } </code ___________________________________________________________ Support the World Aids Awareness campaign this month with Yahoo! For Good http://uk.promotions.yahoo.com/forgood/

2 1

degine MutableGraph
by BomBielFil 08 Feb '08

08 Feb '08

Hi I would use "copy_graph" function, How can I define an empty MutableGraph?? Best Regards -Bombielfil-

1 0

silly newbies problem with date_time...
by joh3＠lithophile.com 07 Feb '08

07 Feb '08

I am sure this will get me slapping my head with my own stuidity, can some one tell me why i am getting this message when i try to compile my application.. /usr/include/boost/date_time/c_time.hpp:49:70: error: macro "localtime" passed 2 arguments, but takes just 1 /usr/include/boost/date_time/c_time.hpp:57:67: error: macro "gmtime" passed 2 arguments, but takes just 1 In file included from /usr/include/boost/date_time/gregorian/gregorian_types.hpp:26, from /usr/include/boost/date_time/gregorian/gregorian.hpp:20, from ./call_asf_import.h:25, i am using a ubuntu linux box with gcc >Target: x86_64-linux-gnu >Configured with: ../src/configure -v >--enable-languages=c,c++,fortran,objc,obj-c++,treelang --prefix=/usr >--enable-shared --with-system-zlib --libexecdir=/usr/lib >--without-included-gettext --enable-threads=posix --enable-nls >--with-gxx-include-dir=/usr/include/c++/4.1.3 --program-suffix=-4.1 >--enable-__cxa_atexit --enable-clocale=gnu --enable-libstdcxx-debug >--enable-mpfr --enable-checking=release x86_64-linux-gnu >Thread model: posix >gcc version 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2) i include the following boost lines in the header... #include <boost/filesystem/path.hpp> #include <boost/filesystem/operations.hpp> // includes path.hpp #include <boost/filesystem/convenience.hpp> // includes all needed //Boost.Filesystem declarations #include "boost/date_time/gregorian/gregorian.hpp" #include "boost/date_time/posix_time/posix_time.hpp" #include "boost/date_time/local_time/local_time.hpp" .... and the gcc line looks like this.... g++ -g -ggdb -Wall -fmessage-length=0 -fPIC -DPIC -fexceptions -I/usr/include/mysql -DBIG_JOINS=1 -I/usr/include -I/usr/include/libxml++-2.6 -I/usr/lib/libxml++-2.6/include -I/usr/include/libxml2 -I/usr/include/glibmm-2.4 -I/usr/lib/glibmm-2.4/include -I/usr/include/sigc++-2.0 -I/usr/lib/sigc++-2.0/include -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -DDEBIAN -fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/lib/perl/5.8/CORE -DPERL_NO_SHORT_NAMES -pthread -fmessage-length=0 -c call_asf_import.cxx -I/export/mirror/joes-stuff/PS_code//include/external -I/export/mirror/joes-stuff/PS_code//include/native -I/export/mirror/joes-stuff/PS_code//obj -I/export/mirror/joes-stuff/PS_code//src -I . -I/usr/include/boost -I/usr/include/stlsoft -I/usr/include/mysql any help would be greatly appreciated. Cheers Joe

1 0

Does boost have a float-to-integer conversion?
by linux＠celticblues.com 07 Feb '08

07 Feb '08

Does boost have a float-to-integer conversion? I need a routine to convert a 32 bit single precision float (1S 8E 23M) to integer, with the end goal being that I can take the integer break it down into bytes... i.e.bits 0-7, 8-15,16-23,24-31.

6 5

need help configuring Boost for CodeSourcery ARM g++ compiler
by Rob Desbois 07 Feb '08

07 Feb '08

I need to compile Boost for an embedded target running GNU/Linux on an ARM CPU. The toolchain for this is proprietary, compiler executable names are like "arm-none-linux-gnueabi-g++". I'm having trouble compiling with this toolchain though - I can't figure out (even with the documentation) what I'm doing wrong, but AFAICT Boost.Build keeps using my default gcc toolchain. In case it's relevant I'm on Cygwin using a self-compiled bjam executable, Boost is v1.34.1 My user-config.jam looks like this: <<<<<<<<<< # Compiler configuration # using gcc ; using gcc : : arm-none-linux-gnueabi-gcc ; using g++ : : arm-none-linux-gnueabi-g++ ; # Python configuration using python : 2.5 : /usr ; >>>>>>>>>> A dry run of the compilation with command: ./bjam --with-iostreams --with-regex --with-serialization --with-test --with-thread --toolset=gcc stage -n Produces a lot of output along these lines: <<<<<<<<<< Building Boost.Regex with the optional Unicode/ICU support disabled. Please refer to the Boost.Regex documentation for more information (don't panic: this is a strictly optional feature). ...patience... ...found 2215 targets... ...updating 977 targets... [--- snipped a load of 'MkDir1' lines ---] gcc.compile.c++ bin.v2/libs/serialization/build/gcc-3.4.4/release/threading-multi/basic_archive.o "g++" -ftemplate-depth-128 -O3 -finline-functions -Wno-inline -Wall -mthreads -DBOOST_ALL_NO_LIB=1 -DBOOST_SERIALIZATION_DYN_LINK=1 -DNDEBUG -I"." -c -o "bin.v2\libs\serialization\build\gcc-3.4.4\release\threading-multi\basic_archive.o" "libs\serialization\src\basic_archive.cpp" >>>>>>>>>> Why is it continuing to use "g++" when i've specified a different g++ executable to be used? Can anyone help me please? TIA, --rob

3 7

[bind] argument binding to templated function
by Sebastian Weber 07 Feb '08

07 Feb '08

Hello, I'm quite puzzled howto bind arguments to the put-function from the property maps-library. I tried a lot, but I do not know what is wrong with: boost::function< void () > ua = lambda::bind(&boost::put<Property, Value>, p, k, val); Here Property ist the type of the PropertyMap, Value the type of the value. p is the PropertyMap, k the key into it, and val the value I want to save there. However, this gives me (boost 1.34.1, g++ 4.1.2) an "unresolved overloaded function type" error, but whats wrong here? Any help would be great. Thanks in advance. Sebastian

1 0

put problem 2 whit graph
by BomBielFil 07 Feb '08

07 Feb '08

Hi I've a problem whit "put" function. My simple code is: -------------------------- typedef Is_finite<Triangulation> Filter; typedef boost::filtered_graph<Triangulation,Filter,Filter> Finite_triangulation; typedef boost::graph_traits<Finite_triangulation>::vertex_descriptor vertex_descriptor; typedef boost::graph_traits<Finite_triangulation>::vertex_iterator vertex_iterator; typedef boost::graph_traits<Finite_triangulation>::edge_descriptor edge_descriptor; typedef boost::graph_traits<Finite_triangulation>::edge_iterator edge_iterator; int main(int,char*[]) { Triangulation t; Filter is_finite(t); Finite_triangulation ft(t, is_finite, is_finite); //graph t.insert(Point(0.4, 1)); t.insert(Point(1, 0.3)); t.insert(Point(0.0, -0.9)); t.insert(Point(-1, 0)); t.insert(Point(1, 2)); boost::property_map<Triangulation,boost::edge_weight_t>::type weight_map=get(boost::edge_weight,ft); edge_iterator eit,eend; for (boost::tie(eit,eend)=boost::edges(ft); eit!=eend; ++eit) { std::cout << "PESO: " << get(weight_map,*eit) << "\n"; put(weight_map,*eit ,100); std::cout << "PESO2: " << get(weight_map,*eit) << "\n"; } return 0; } ------ at compile time I've: "/property_map.hpp:319: error: invalid lvalue in assignment" Why get is right and put no??Can help me?? Best regards -Bombielfil-

2 3

A strange local facet error.
by Yeti_RO 07 Feb '08

07 Feb '08

Well shortly presented. We have this code form the Boost [url=http://www.boost.org/libs/serialization/doc/codecvt.html]site.[/url] // My encoding type typedef wchar_t ucs4_t; std::locale old_locale; std::locale utf8_locale(old_locale,new utf8_codecvt_facet<ucs4_t>); // Set a New global locale std::locale::global(utf8_locale); // Send the UCS-4 data out, converting to UTF-8 { std::wofstream ofs("data.ucd"); ofs.imbue(utf8_locale); std::copy(ucs4_data.begin(),ucs4_data.end(), std::ostream_iterator<ucs4_t,ucs4_t>(ofs)); } And the error messages: : error C2661: 'std::locale::facet::operator new' : no overloaded function takes 3 arguments : error C2059: syntax error : ')' : error C2065: 'utf8_locale' : undeclared identifier : error C2065: 'ucs4_data' : undeclared identifier : error C2228: left of '.begin' must have class/struct/union Any ideas why ? ANd mainly how to fix it ? Am I using something wrong. Any other advice. -- View this message in context: http://www.nabble.com/A-strange-local-facet-error.-tp15249652p15249652.html Sent from the Boost - Users mailing list archive at Nabble.com.

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Crash while using binary_oarchive on Sol86 with Forte 11 and stlport
by Sharad Gaur 07 Feb '08

07 Feb '08

Hi all, Following piece of code is crashing for us on Sol86 with Forte 11 compiler and stlport. Let me know if someone has any idea about this. SunOS insol8614 5.10 Generic_118855-33 i86pc i386 i86pc CC: Sun C++ 5.8 Patch 121018-11 2007/05/02 int main() { using namespace std; const std::string s("Test..................\n") ; ofstream file("hello.gz", ios::binary); boost::iostreams::filtering_ostream ofilter; ofilter.push(boost::iostreams::gzip_compressor()) ; ofilter.push(file); boost::archive::binary_oarchive oar(ofilter) ; oar << s; } Here is the stack trace. std::basic_streambuf<char,std::char_traits<char> >::pubsync(0x8046730) boost::iostreams::detail::flush_device_impl<boost::iostreams::ostream_tag>::flush<std::basic_ostream<char,std::char_traits<char> > >(t = CLASS) boost::iostreams::flush<std::basic_ostream<char,std::char_traits<char> > >(t = CLASS) boost::iostreams::detail::close_impl<boost::iostreams::any_tag>::close<std::basic_ostream<char,std::char_traits<char> > >(t = CLASS, which = 24) boost::iostreams::close<boost::reference_wrapper<std::basic_ostream<char,std::char_traits<char> > > >(t = CLASS, which = 24) boost::iostreams::detail::mode_adapter<boost::iostreams::output,std::basic_ostream<char,std::char_traits<char> > >::close(this = 0x80f56d8, which = 24) boost::iostreams::detail::close_impl<boost::iostreams::closable_tag>::close<boost::iostreams::detail::mode_adapter<boost::iostreams::output,std::basic_ostream<char,std::char_traits<char> > > >(t = CLASS, which = 16) boost::iostreams::close<boost::iostreams::detail::mode_adapter<boost::iostreams::output,std::basic_ostream<char,std::char_traits<char> > > >(t = CLASS, which = 16) boost::iostreams::detail::device_wrapper_impl<boost::iostreams::any_tag>::close<boost::iostreams::detail::mode_adapter<boost::iostreams::output,std::basic_ostream<char,std::char_traits<char> > >,boost::iostreams::detail::linked_streambuf<char,std::char_traits<char> > >(dev = CLASS, _ARG2 = (nil), which = 16) boost::iostreams::detail::concept_adapter<boost::iostreams::detail::mode_adapter<boost::iostreams::output,std::basic_ostream<char,std::char_traits<char> > > >::close<boost::iostreams::detail::linked_streambuf<char,std::char_traits<char> > >(this = 0x80f56d8, which = 16, dev = (nil)) boost::iostreams::detail::indirect_streambuf<boost::iostreams::detail::mode_adapter<boost::iostreams::output,std::basic_ostream<char,std::char_traits<char> > >,std::char_traits<char>,std::allocator<char>,boost::iostreams::output>::close(this = 0x80f56a0, which = 16) boost::iostreams::detail::chain_base<boost::iostreams::chain<boost::iostreams::output,char,std::char_traits<char>,std::allocator<char> >,char,std::char_traits<char>,std::allocator<char>,boost::iostreams::output>::close(b = 0x80f56a0, m = 16) boost::iostreams::detail::chain_base<boost::iostreams::chain<boost::iostreams::output,char,std::char_traits<char>,std::allocator<char> >,char,std::char_traits<char>,std::allocator<char>,boost::iostreams::output>::closer::operator()(this = 0x8046470, b = 0x80f56a0) std::for_each<std::_List_iterator<boost::iostreams::detail::linked_streambuf<char,std::char_traits<char> >*,std::_Nonconst_traits<boost::iostreams::detail::linked_streambuf<char,std::char_traits<char> >*> >,boost::iostreams::detail::chain_base<boost::iostreams::chain<boost::iostreams::output,char,std::char_traits<char>,std::allocator<char> >,char,std::char_traits<char>,std::allocator<char>,boost::iostreams::output>::closer>(__first = STRUCT, __last = STRUCT, __f = STRUCT) boost::iostreams::detail::chain_base<boost::iostreams::chain<boost::iostreams::output,char,std::char_traits<char>,std::allocator<char> >,char,std::char_traits<char>,std::allocator<char>,boost::iostreams::output>::chain_impl::close(this = 0x80b13e0) boost::iostreams::detail::chain_base<boost::iostreams::chain<boost::iostreams::output,char,std::char_traits<char>,std::allocator<char> >,char,std::char_traits<char>,std::allocator<char>,boost::iostreams::output>::chain_impl::~chain_impl(this = 0x80b13e0) boost::checked_delete<boost::iostreams::detail::chain_base<boost::iostreams::chain<boost::iostreams::output,char,std::char_traits<char>,std::allocator<char> >,char,std::char_traits<char>,std::allocator<char>,boost::iostreams::output>::chain_impl>(x = 0x80b13e0) boost::detail::sp_counted_impl_p<boost::iostreams::detail::chain_base<boost::iostreams::chain<boost::iostreams::output,char,std::char_traits<char>,std::allocator<char> >,char,std::char_traits<char>,std::allocator<char>,boost::iostreams::output>::chain_impl>::dispose(this = 0x80b26a8) boost::detail::sp_counted_base::release(this = 0x80b26a8) boost::detail::shared_count::~shared_count(this = 0x80466c8) boost::shared_ptr<boost::iostreams::detail::chain_base<boost::iostreams::chain<boost::iostreams::output,char,std::char_traits<char>,std::allocator<char> >,char,std::char_traits<char>,std::allocator<char>,boost::iostreams::output>::chain_impl>::~shared_ptr(0x80466c4) boost::iostreams::detail::chain_base<boost::iostreams::chain<boost::iostreams::output,char,std::char_traits<char>,std::allocator<char> >,char,std::char_traits<char>,std::allocator<char>,boost::iostreams::output>::~chain_base(0x80466c4) boost::iostreams::chain<boost::iostreams::output,char,std::char_traits<char>,std::allocator<char> >::~chain(0x80466c4) boost::iostreams::detail::filtering_stream_base<boost::iostreams::chain<boost::iostreams::output,char,std::char_traits<char>,std::allocator<char> >,boost::iostreams::public_>::~filtering_stream_base(0x80466b8, 0x80b07b4) boost::iostreams::filtering_stream<boost::iostreams::output,char,std::char_traits<char>,std::allocator<char>,boost::iostreams::public_>::~filtering_stream(this = 0x80466b8) main()

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Another desperate request for help with a simple IOStreams sink and filter
by Stefan Arentz 07 Feb '08

07 Feb '08

I'm looking for some help with the following code where I try to implement an aggregate filter and a sink. This super simple example is supposed to print the xorred input but instead it prints: The result is: do_filter write: 01+x1+x,*!x76= Does anyone understand why the filtering and sink.write are not done as part of the copy operation? The last two lines should be printed as part of the copy process! It seems they are executed as part of destructing these objects instead? This stuff should be so simple :-/ S. #include <cctype> #include <iostream> #include <memory> #include <string> #include <boost/iostreams/copy.hpp> #include <boost/iostreams/stream.hpp> #include <boost/iostreams/device/back_inserter.hpp> #include <boost/iostreams/device/file_descriptor.hpp> #include <boost/iostreams/device/file.hpp> #include <boost/iostreams/filter/aggregate.hpp> #include <boost/iostreams/filtering_stream.hpp> /// template< typename Ch, typename Alloc = std::allocator<Ch> > class basic_xor_filter : public boost::iostreams::aggregate_filter<Ch, Alloc> { private: typedef boost::iostreams::aggregate_filter<Ch, Alloc> base_type; public: typedef typename base_type::char_type char_type; typedef typename base_type::category category; typedef std::basic_string<Ch> string_type; public: basic_xor_filter(Ch key) : key_(key) { } private: typedef typename base_type::vector_type vector_type; void do_filter(const vector_type& src, vector_type& dest) { std::cout << "do_filter" << std::endl; for (size_t i = 0; i < src.size(); ++i) { dest.push_back(src[i] ^ key_); } } private: Ch key_; }; BOOST_IOSTREAMS_PIPABLE(basic_xor_filter, 1) typedef basic_xor_filter<char> xor_filter; typedef basic_xor_filter<wchar_t> wxor_filter; /// class my_string_sink : public boost::iostreams::sink { public: my_string_sink(std::string& buffer) : buffer_(buffer) { } public: std::string const& str() { return buffer_; } public: std::streamsize write(const char* s, std::streamsize n) { std::cout << "write: " << std::string(s,n) << std::endl; buffer_.append(s, n); return n; } private: std::string& buffer_; }; /// int main() { { // This does not work boost::iostreams::filtering_istream in; in.push(boost::make_iterator_range("This is try one")); std::string result; boost::iostreams::filtering_ostream out; out.push(xor_filter('X')); out.push(my_string_sink(result)); boost::iostreams::copy(in, out); std::cout << "The result is: " << result << std::endl; } }

2 2

[signals] signals::slot_type not working?
by Robert Dailey 06 Feb '08

06 Feb '08

Hi, below is my code: template< InputSubscription t_sub > static void subscribe( SignalBank const& bank, typename GetSignal<t_sub>::signal::slot_type& slot ) { using boost::fusion::at_c; at_c<t_sub>( bank.signals ).connect( slot ); } void mouseCB( int, int ) { } void footest() { SignalBank bank; //boost::fusion::at_c<1>( bank.signals )( 3, 4 ); subscribe<INPUTSUB_MOUSE_MOTION>( bank, &mouseCB ); }; Notice that I have a wrapper function, 'subscribe', which uses the slot_type member of the signals class to pass the slot to the connect() function. However, visual studio 9 reports the following error: *error C2664: 'bob::input::subscribe' : cannot convert parameter 2 from 'void (__cdecl *)(int,int)' to 'boost::slot<SlotFunction> &' with [ SlotFunction=boost::function<void (int,int)> ] *Any solutions to fix the problem?* *

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Re: [Boost-users] Boost.Utility/Singleton Problem when using with dynamic libraries
by NFarnsworth＠web.de 06 Feb '08

06 Feb '08

Hello, Unfortunately I still need help with these problems please. Is there anybody who could explain me how to use the Boost.Utilty/Singleton with dlls? The test examples of the singleton didn't clearify for me, how I can do this. Best regards Niklas > > Hello, > I want to use the Boost.Utility/Singleton together with dll's. I use the Visual Studio 2005 and Windows XP. > I have three dynamic libraries. In library A the Singleton is implemented and library B and C access to the Singleton. The dynamic libraries B and C > > are compiled with the clr compiler Option. The Problem is, that the Singleton will be twice instantiated when library A and B access to the singleton. > > The singleton declaration looks like the following code: > //Singleton.h > class Singleton : public boost::singleton<Singleton ,1,factorylib_tag > > { > public: > CPP_API Singleton (boost::restricted); > … > BOOST_SINGLETON_PLACEMENT_DECLARATION > … > } > CPP_API is a definition of the dll export. > > #if defined( _WIN32 ) && defined( _MSC_VER ) > # if defined SINGLETON_EXPORTS > # define CPP_API __declspec( dllexport ) > # else > # define CPP_API __declspec( dllimport ) > # pragma warning( disable : 4251 ) // 'identifier' : class 'type' needs to have dll-interface to be used by clients of class 'type2' > > # endif > #endif > > In the Project properties of library B and C in "additional linkage input" I included the import library of the dll A. > > Another problem is, that the application crashes when I close the application. > The crash happens in > C.dll!_CRT_INIT(void * hDllHandle=0x0f8b0000, unsigned long dwReason=0, void * lpreserved=0x00000001) line 420 > -> _free_crt ( onexitbegin ) ; > And also : > B.dll!_CRT_INIT(void * hDllHandle=0x0f8b0000, unsigned long dwReason=0, void * lpreserved=0x00000001) line 420 > -> _free_crt ( onexitbegin ) ; > If I don't use the singleton, the application will not crash. > > Another Problem is, that I can not compile the following code: > > class DataPoolManagerImpl : public boost::mutexed_singleton<DataPoolManagerImpl,2,datapoollib_tag> > { > > Then I will get the following error message: > > boost\utility\mutexed_singleton.hpp(212) : error C2248: "boost::mutexed_singleton<Derived,DisposalSlot>::instance_proxy": cannot access private class, which is declared in boost::mutexed_singleton<Derived,DisposalSlot> > > with > [ > Derived=DataPoolManagerImpl, > DisposalSlot=2 > ] > \boost\utility\mutexed_singleton.hpp(41): see declaration of 'boost::mutexed_singleton<Derived,DisposalSlot>::instance_proxy' > > with > [ > Derived=DataPoolManagerImpl, > DisposalSlot=2 > ] > \boost\utility\mutexed_singleton.hpp(211): During compiling the class template of the static data member "const boost::mutexed_singleton<Derived,DisposalSlot,SubsystemTag>::instance_proxy boost::mutexed_singleton<Derived,DisposalSlot,SubsystemTag>::instance". > > with > [ > Derived=DataPoolManagerImpl, > DisposalSlot=2, > SubsystemTag=datapoollib_tag > ] > \datapoolmanager.h(43): see reference of instantiation of compiled class template "boost::mutexed_singleton<Derived,DisposalSlot,SubsystemTag>". > > with > [ > DataPoolManagerImpl, > DisposalSlot=2, > datapoollib_tag > ] > \boost\utility\mutexed_singleton.hpp(212) : error C2440: Initialization': 'boost::mutexed_singleton<Derived,DisposalSlot>::instance_proxy' could not converted in 'boost::mutexed_singleton<Derived,DisposalSlot,SubsystemTag>::instance_proxy' > > with > [ > Derived=DataPoolManagerImpl, > DisposalSlot=2 > ] > > With : > class DataPoolManagerImpl : public boost::singleton<DataPoolManagerImpl,2,datapoollib_tag> > There are no compiler errors. > > Could you tell me how I can solve these problems please? > Thank you for your help in advance and best regards > Niklas _______________________________________________________________________ Jetzt neu! Schützen Sie Ihren PC mit McAfee und WEB.DE. 30 Tage kostenlos testen. http://www.pc-sicherheit.web.de/startseite/?mc=022220

1 0

[function] How to obtain the signature type?
by Robert Dailey 06 Feb '08

06 Feb '08

Hi, Currently I have the following: typedef boost::function<void (int)> MyFunction; Is there a typedef in the boost::function class for the Signature template parameter? I need access to the function type passed into the boost::function object. I've tried finding the boost::function class in the source, but that turned out to be impossible. The documentation also does not explain how to do this from what I saw. Any help is appreciated.

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[flyweight][review] Flyweight accepted
by Ion Gaztañaga 06 Feb '08

06 Feb '08

Hi to all, The Flyweight library submitted by Joaquín M. López Muñoz has been *accepted* into Boost. Thanks to all reviewers and all who contributed to the library before the review. We've received 10 reviews (Alberto Ganesh Barbati, David Sankel, John Reid, John Torjo, Kevin Scopp, Marcus Lindblom, Markus Werle, Matias Capeletto, Neil Hunt, Tim Blechmann), and all except Alberto's one were positive. Please, if I've missed a review, let me know. Joaquín agreed to address Alberto's comments (either with keyed_flyweight or by another method) and I like to encourage Joaquín and Alberto and the rest of the Boost community to improve the flyweight library to optimize and adapt it for situations like Alberto has described. I'm pretty sure that we'll reach an agreement. I'll have some time during the weekend to read all the reviews and write an small summary of requested changes, ideas, complaints, etc... to summarize the review process. Congratulations to Joaquín and thanks to all those who have participated in the review. Ion Gaztañaga - Review Manager -

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Saving to older version
by at forum 06 Feb '08

06 Feb '08

Hi I am testing boost serialization to integrate it in our software. Actually I am using mfc I want to save an object to an older version? I using the split method (save and load) and I don't find how to pass the version to the save function? "BOOST_SERIALIZATION_NVP(this)" is using the current object version. code : class CMyPoint { friend class boost::serialization::access; protected: int m_nX, m_nY; std::string m_sName; public: CMyPoint() { m_nX = 0; m_nY = 0; m_sName = ""; } CMyPoint(int nX, int nY, std::string sName = "") { m_nX = nX; m_nY = nY; m_sName = sName; } void SetX(int nX) { m_nX = nX; } void SetY(int nY) { m_nY = nY; } virtual void Assign(const CMyPoint &pt) { m_nX = pt.m_nX; m_nY = pt.m_nY; } CMyPoint& operator =(const CMyPoint &pt) { Assign(pt); return *this; } template<class Archive> void save(Archive & ar, const unsigned int version) const { ar & BOOST_SERIALIZATION_NVP(m_nX) & BOOST_SERIALIZATION_NVP(m_nY); if(2 <= version) ar & BOOST_SERIALIZATION_NVP(m_sName); } template<class Archive> void load(Archive & ar, const unsigned int version) { ar & BOOST_SERIALIZATION_NVP(m_nX) & BOOST_SERIALIZATION_NVP(m_nY); if(2 <= version) ar & BOOST_SERIALIZATION_NVP(m_sName); } BOOST_SERIALIZATION_SPLIT_MEMBER() void Save(const char * filename) { std::ofstream ofs(filename); assert(ofs.good()); boost::archive::xml_oarchive oa(ofs); oa << BOOST_SERIALIZATION_NVP(this); } void Load(const char * filename) { std::ifstream ifs(filename); assert(ifs.good()); boost::archive::xml_iarchive ia(ifs); ia >> BOOST_SERIALIZATION_NVP(this); } }; BOOST_CLASS_VERSION(CMyPoint, 2) BOOST_CLASS_EXPORT_GUID(CMyPoint, "CMyPoint") Thank you

1 1

Linker error
by Robert Dailey 06 Feb '08

06 Feb '08

Hi, I'm using Visual Studio 9 on Windows. Up until I the inclusion of <boost/signals.hpp>, my application linked fine. Now I'm getting the following linker error: *LINK : fatal error LNK1104: cannot open file 'libboost_signals-vc90-mt-gd-1_35.lib' *Here is the order of my includes in my precompiled header: #include <boost/timer.hpp> #include <boost/function.hpp> #include <boost/noncopyable.hpp> #include <boost/shared_ptr.hpp> #include <boost/scoped_ptr.hpp> #include <boost/bind.hpp> #include <boost/array.hpp> #include <boost/xpressive/xpressive.hpp> #include <boost/signals.hpp>

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[BGL] Sorting Edges
by John Hood 06 Feb '08

06 Feb '08

Hello, all, Sorry to spam the list over this, but I my need is dire. In reading the boost::graph documentation, I stumbled across an example of sorting a graph's edges (I am trying to implement a bi-directional graph with edge-sorting). I have been searching through the docs, but to no avail. Could some kind soul point me in the right direction? Many thanks. -J

2 1

MACRO to evaluate mpl::size::value as a constant.
by Tim St. Clair 06 Feb '08

06 Feb '08

Is there a MACRO which returns a constant when evaluating the size of an mpl sequence. Here is what I'm trying to do: #define MY_MACRO (N) CREATE_FOO_BAR_FN##N #define SUPERFUNK (CLASSA, ...)\ CLASSA { \ typedef mpl::vector<__VA_ARGS__> v0; \ MY_MACRO ( ??SOME_BOOST_MACRO??(mpl::size<v0>::value) ) \ } \ If seems like this should be possible given that I can do the following: BOOST_MPL_ASSERT_RELATION(mpl::size<v0>::value, ==, 0); -- Regards, Timothy St. Clair [timothysc(a)gmail.com]

2 2

[graph] removing self-edges bug?
by Sebastian Weber 06 Feb '08

06 Feb '08

Hi everyone! I think I've hit a but in the remove_edge(u,v,bg) function in case I want to delete a self-edge. The following code crashes on my machine: using namespace boost; typedef adjacency_list<vecS, vecS, undirectedS > ubase_graph_t; ubase_graph_t bg(5); add_edge(0, 1, bg); add_edge(1, 2, bg); add_edge(3, 4, bg); add_edge(4, 0, bg); add_edge(2, 2, bg); remove_edge(2, 2, bg); However, deleting via edge_descriptors is working: BGL_FORALL_OUTEDGES(2, ed, bg, ubase_graph_t) { if(target(ed, bg) == 2) { remove_edge(ed, bg); break; } } So what is wrong with remove_edge(u, u, bg) if there is a self-edge? My boost version is 1.34.1 and I am using g++ 4.1.2 on an ubuntu gutsy machine. Some info from gdb, but the output is just not usable to me - I have no clue what happens: *** glibc detected *** ../build/tools/gcc/debug/revTest: free(): invalid next size (fast): 0x08085420 *** ======= Backtrace: ========= /lib/tls/i686/cmov/libc.so.6[0xb743bd65] /lib/tls/i686/cmov/libc.so.6(cfree+0x90)[0xb743f800] /usr/lib/libstdc++.so.6(_ZdlPv+0x21)[0xb7603d81] ../build/tools/gcc/debug/revTest[0x804f943] ../build/tools/gcc/debug/revTest[0x804f978] ../build/tools/gcc/debug/revTest[0x8050c7f] ../build/tools/gcc/debug/revTest[0x8050cbf] ../build/tools/gcc/debug/revTest[0x80510f3] ../build/tools/gcc/debug/revTest[0x8051180] ../build/tools/gcc/debug/revTest[0x8049b4b] /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe0)[0xb73e8050] ../build/tools/gcc/debug/revTest(__gxx_personality_v0+0x81)[0x80497b1] Greetings, Sebastian

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[boost.iostreams] Can't be able to read gzipped file
by Marc Viala Perso 06 Feb '08

06 Feb '08

Hello, During the implementation of a TARFILE module based on Boost.Iostream, I've faced a problem during reading operation of a boost::iostream::filtering_stream<> with a GZip codec. To illustrate it, you will find hereafter a small code snippet that reproduces my problem: namespace io = boost::iostreams ; namespace fs = boost::filesystem ; const fs::path test_file("test.txt.gz") ; const std::string s("Test..................") ; { io::filtering_stream<io::output> ofilter ; ofilter.push(io::gzip_compressor()) ; ofilter.push(io::file_descriptor_sink( test_file.external_file_string() , std::ios::binary)) ; ofilter << s ; } { io::filtering_stream<io::input> ifilter ; ifilter.push(io::gzip_decompressor()) ; ifilter.push(io::file_descriptor_source( test_file.external_file_string() , std::ios::binary)) ; std::string rs ; ifilter >> rs ; // <- Here process is blocked in file_description.cpp @ line 145 //boost::scoped_array<char> buffer(new char[512]) ; //const std::streamsize count = io::read(ifilter, buffer.get(), 512) ; } The problem occurs during the reading operation @ line: "ifilter >> rs": the process is blocked in boost/iostreams/src/file_description.cpp @ line 145 ("if (!::ReadFile(pimpl_->handle_, s, n, &result, NULL))") when this line is executed. I've tried to use boost::iostream::read() template function without more success. I've checked the file after the writing operation w/ 7z and everything is fine at this point. I've tried the same code snippet w/ ZLib and BZip2 codecs without trouble. My environment is: Visual C++ 7.1 Boost 1.34.1 Windows XP SP2 Is there any bug in GZip decompressor with the file_descriptor_source? Or I've missed something? Any help will be appreciated. Best regards, Marc VIALA

2 5

Thread creation overhead & efficiency
by James Sutherland 05 Feb '08

05 Feb '08

I am a new user of boost::thread. After implementing it I found that it slowed down execution of my code. I suspect that it may be due to the overhead of thread creation. I am creating/destroying thread_group ojects many times (tens of thousands) during code execution. Pardon my naïve question, but is this a problem for performance? I noticed some reference to a thread pool on this list. Is a thread pool the best alternative in this situation? Thanks for any guidance, James

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