- Boost - lists.boost.org

shared_mutex deadlocks?
by Peter Dimov 23 Apr '08

23 Apr '08

I'm seeing a deadlock on a dual core Pentium D from libs/smart_ptr/test/sp_atomic_mt_test.cpp when USE_RWLOCK is defined (which causes it to use boost::shared_mutex). It works on uniprocessor.

4 11

[shared_ptr] gcc-warnings in yield_k.hpp
by Juergen Hunold 23 Apr '08

23 Apr '08

Hi ! Peter Dimov commited some refacturings for shared_ptr last weekend. One commit triggered the following warning from gcc-4.2: In file included from yield_k_test.cpp:12: $BOOST_ROOT/boost/boost/detail/yield_k.hpp: In function 'void boost::detail::yield(unsigned int)': $BOOST_ROOT/boost/detail/yield_k.hpp:114: warning: missing initializer for member 'timespec::tv_nsec' This is gcc-4.2 on SuSE-10.3 and Kubuntu Hardy. We compile our code with -Wextra. Adding -Wextra to the compile flags of the yield_k test in libs/smart_ptr/test shows this warning in the regression test. I've got a small fix attached which (hopefully) initialises "rqtp" completely in the initialiser list and removes the (hopefully) redundant assignments. I've manually run the regression test and they pass. I'm unsure if this is the right test. Comments ? Okay to commit ? Yours, Jürgen -- * Dipl.-Math. Jürgen Hunold ! Ingenieurgesellschaft für * voice: ++49 511 262926 57 ! Verkehrs- und Eisenbahnwesen mbH * fax : ++49 511 262926 99 ! Lister Straße 15 * juergen.hunold(a)ivembh.de ! www.ivembh.de * * Geschäftsführer: ! Sitz des Unternehmens: Hannover * Prof. Dr.-Ing. Thomas Siefer ! Amtsgericht Hannover, HRB 56965 * PD Dr.-Ing. Alfons Radtke !

3 5

[Serialization] Thread-safety of trunk code
by Sohail Somani 22 Apr '08

22 Apr '08

Hey Robert, I know I promised I'd look into it a long time ago, and I finally got around to it. It appears you have addressed the thread-safety issue by ensuring that all the mutable singleton objects get created before main. Is this correct? If so, then the problem is shifted to the implementation-specifics. I see two things that need to be determined for a given compiler/OS: 1) If you dynamically load a dll/shared object (eg, dlopen/LoadLibrary) does your loader guarantee that the global C++ constructors will be called? I recall some Unices that I've had the misfortune of coming across where this is not the case. 2) Does the singleton<T> + static T reference hack work as expected on the compiler? For users, perhaps it would be most helpful to have tests that test the above. I think there are tests that test the second case indirectly. If memory serves, BBv2 is a hurdle to getting the first in a test-case. Perhaps one of the BBv2 gurus can help you there ;-) Other than that, it looks good to me. Good job rewriting the dangerous parts rather than patching in the thread-safety. This is based on my reading and not actually testing the thread-safety so your mileage may vary ;-) -- Sohail Somani http://uint32t.blogspot.com

2 4

[unordered] request for ways to get more space efficient allocations
by Thorsten Ottosen 22 Apr '08

22 Apr '08

Hi Jeremy, You implementation is great. I have one problem though, and that is that the size of the buckets is of way larger that it has to be. I find that in many applications I know the size of the map Iøm going to construct. Furthermore, I also find that N elements of type T* or unsigned int can be put in a hash map/set with N (or very close to N) buckets without gettng a max load factor above 1 (so the distribution of elements is perfect). This is probably because my T* objects points to consecutive memory locations or because my integers fall in a narrow range like [0,N]. Nevertheless, in such situations the container will allocate a huge number of buckets --- far more than needed wasting too much memory. I tried expanding your list of primes so that it contains more numbers in the small range and in particulat such that it contains numbers closely above powers of 2. It happens frequently that powers of 2 comes up. Here's my new list: static const std::size_t prime_list[] = { 5ul, 11ul, 17ul, 29ul, 37ul, 53ul, 67ul, 79ul, 97ul, 131ul, 193ul, 257ul, 389ul, 512ul, 769ul, 1031ul, 1543ul, 2053ul, 3079ul, 6151ul, 12289ul, 24593ul, 49157ul, 98317ul, 196613ul, 393241ul, 786433ul, 1572869ul, 3145739ul, 6291469ul, 12582917ul, 25165843ul, 50331653ul, 100663319ul, 201326611ul, 402653189ul, 805306457ul, 1610612741ul, 3221225473ul, 4294967291ul }; For the test I conducted, not once did I get a max load factor above 1 for containers of size 4, 5, 7, 9 etc up to about 512. Another alternative would be to allow users to control the initial bucket coutn explcitly in the constructor. I think I might like this better. Something like boost::unordered_set<T*> the_set( boost::unordered::bucket_count(32u) ); assert( the_set.bucket_count() == 32u ); Comments? -Thorsten

5 10

Trac open bugs - by assignee
by Marshall Clow 22 Apr '08

22 Apr '08

[ 287 open bugs today, 289 yesterday ] If you are maintaining a library, and have not logged into the trac system at <http://svn.boost.org/trac/boost/>, please do so ASAP. Until you do that, no tickets can be assigned to you, and will remain under "None". Instructions on working with tickets can be found at: <http://svn.boost.org/trac/boost/wiki/TicketWorkflow> and a mapping of user names to "real names" can be found at: <http://svn.boost.org/trac/boost/report/16> Bug summary 28 djowel 23 grafik 23 az_sw_dude 16 vladimir_prus 15 dave 15 bemandawes 13 dgregor 12 doug_gregor 11 no-maintainer 11 anthonyw 11 agurtovoy 9 ramey 9 jsiek 8 turkanis 8 rogeeff 8 nesotto 6 danieljames 5 igaztanaga 5 None 4 witt 4 pavol_droba 4 ebf 4 danielw 3 samuel_krempp 3 nasonov 3 kaalus 3 johnmaddock 2 troyer 2 shammah 2 jmaurer 2 hkaiser 2 garcia 1 urzuga 1 t_schwinger 1 speedsnail 1 pdimov 1 matias 1 marshall 1 guwi17 1 fcacciola 1 eric_niebler 1 dlwalker 1 chris_kohlhoff 1 aaron_windsor 1 <Blank> <Blank> 1750 Autolink library name not in sync with actually build lib None 1736 Headers containing non ASCII characters cause MS VC to issue warning 4819 in some locales None 1744 No information on building static libraries with bjam under Windows None 1835 boost::thread equality operator bogus in 1.35 ? None 1843 gcc-4.3: wave compile fix None 1847 Can't compile without <locale> header_ boost::lexical_cast problem aaron_windsor 1622 Adjacency list needs to handle self-edges correctly agurtovoy 1001 gcc 4.1.2 segfaults on mpl/test/apply.cpp agurtovoy 1051 MPL header ordering triggers bug agurtovoy 1099 unable to iterate through a "non-explicitly-declared" mpl::set agurtovoy 1215 Boost 1.34.1_ mpl: Wrong workaround detection using MinGW32 (or.hpp_ line #33) agurtovoy 1317 has_xxx randomly broken in msvc agurtovoy 1469 [mpl] nested typedef of set has two different meanings agurtovoy 1476 always<> is not nullary. agurtovoy 1528 g++ 4.3.0 reports error because of redeclaration of next agurtovoy 1549 Boost.MPL: 'index_of' algorithm is not documented agurtovoy 1568 duplicate include guards agurtovoy 588 mpl::remove compile error with gcc 4.1.0 anthonyw 1154 tss destruction segfaults in conjunction with dlopen/dlclose anthonyw 1168 [thread] tss crashes randomly anthonyw 1268 xtime_cmp changes to deal with overflow were reverted anthonyw 1470 Boost.Thread: Compilation errors with non-__cdecl calling convention anthonyw 1805 thread creation crashes with /Zp1 switch in VS2005 compiler anthonyw 1813 Signed/Unsigned warning in win32/condition_variable anthonyw 1825 thread.hpp injects windows.h and breaks user application. anthonyw 1826 Auto detection of threadapi and target-os broken under cygwin gcc anthonyw 1834 boost::condition drops signals with notify_one() anthonyw 876 xtime documentation incomplete anthonyw 881 errors when build with Apache stdcxx az_sw_dude 1028 typo in boost header: date_time/time_defs.hpp az_sw_dude 1078 from_iso_string cannot read the output from to_iso_string az_sw_dude 1098 Urgent libboost-date-time1.33.1 : bugs on ia64 ? az_sw_dude 1147 date_time library contains global #define ERROR az_sw_dude 1160 warning: month_format shadows a member of this az_sw_dude 1162 warning: ticks shadows a member of this az_sw_dude 1289 posix_time::time_facet forgets to pass a_ref argument to base class az_sw_dude 1299 change in typedef stringstream_type in format_date_parser.hpp causing compilation error az_sw_dude 1306 invalid docbook in date_period.xml az_sw_dude 1384 Linking problem with date_time library on Visual C++ 2008 Express az_sw_dude 1524 format_date_parser.hpp(221) : cannot convert parameter 1 az_sw_dude 1574 operator<< for boost::posix_time::ptime ignores ostream flags az_sw_dude 1674 date_time::date_formatting.hpp: incorrectly formats year using global locale az_sw_dude 1695 add correct namespace to class to fix compilation bug az_sw_dude 1726 boost/date_time/posix_time/time_formatters.hpp incorrectly formats fractional seconds using global locale az_sw_dude 1740 date_time includes <windows.h> az_sw_dude 1788 local_time::local_time_period streaming operators not implemented az_sw_dude 287 wrong usage of ios_base::narrow az_sw_dude 316 date_time type conversion warning az_sw_dude 604 from_ftime incorrectly processes FILETIME filled with zeros az_sw_dude 642 operator<< for gregorian::date_duration not found az_sw_dude 889 Insane Dependencies az_sw_dude 890 date_time library supports only the current dst rule bemandawes 1378 filesystem path invalid name for hidden files (LINUX) bemandawes 1389 filesystem::ostream << boost::format generates operator ambigious error (in MSVC++) bemandawes 1458 Darwin Tiger throws std::runtime_error: locale::facet::_S_create_c_locale name not valid bemandawes 1578 bug in readdir_r_simulator() in a multi-threaded environment bemandawes 1583 Serious flaw in boost::filesystem filename handling (opensuse) bemandawes 1589 [filesystem] 'mbstate_t' : is not a member of 'std' bemandawes 1606 filesystem/src/exception.cpp doesn't build with gcc bemandawes 1613 Link Errors against file_system on OS X with Intel Version 10.1 C++ compilers bemandawes 1682 path_traits needs imbue() bemandawes 1701 boost::filesystem::remove_all - segmentation fault with wpath on Linux bemandawes 1711 Boost Serialization export facility broken on gcc 4.1_ 4.2 bemandawes 1767 missing file: boost/filesystem/cerrno.hpp bemandawes 1768 system: error_code.cpp #defines macros without checking whether already defined bemandawes 1840 name check functions have different behavior wrt empty string bemandawes 752 directory_iterator doesn't work with catch chris_kohlhoff 1703 [asio] Compiler warnings on VC8/9 + warning level 4 danieljames 1554 When BOOST_HASH_NO_EXTENSIONS is defined hash doesn't support new string types. danieljames 1555 When BOOST_HASH_NO_EXTENSIONS is defined hash doesn't support boost::system::error_code danieljames 1705 [boostbook] Spaces in reference file names for types like 'long long' danieljames 1742 Some bugs in http://www.boost.org/doc/libs/1_35_0 danieljames 1743 Documentation has incorrect Build & Link settings for some libraries danieljames 1818 The tables in status reports jump all over the place. danielw 1044 Argument pack inaccessable in a functions return type danielw 1054 Parameter takes an "infinite" amount of time to compile with the Intel compiler. danielw 1097 keyword.hpp generates many warnings C4180: qualifier applied to function type has no meaning; ignored danielw 1784 [parameter] missing include dave 1010 linking boost.python on freebsd dave 1019 iterator_facade::pointer should be the return type of operator-> (DR 445) dave 1085 Python rules for compiling in Mac OS X dave 1179 [boost.python] can not export a union in VC2005sp1 dave 1181 [boost.python] can modify enum value dave 1387 Review / update docs to reflect changes dave 1460 Python classes with multiple bases are convertible only to the first class in the lists dave 1482 boost::python::throw_error_already_set should be marked noreturn dave 1516 [python] Failing VC9 regression tests dave 1599 [python] '_set_se_translator': identifier not found dave 1697 [utility][noncopyable] ADL barrier broken by msvc-9.0 dave 1730 No debug libs on Windows by default dave 1833 Boost.Python used with Boost.TR1 broken dave 865 Use of C++0x keyword as identifier dave 910 gcc strict-aliasing problems with python dgregor 1009 Improper overflow handling in shortest paths algorithms dgregor 1164 Floyd Warshall broken with unsigned edge weights dgregor 1192 [boostbook] problem when two files have the same name dgregor 1199 configure doesn't work with path containing whitespaces (MacOS X) dgregor 1310 [result_of] const-qualified function pointer doesn't work dgregor 1326 Unable to check graph isomorphism using LEDA adapter dgregor 1391 dominator_tree_test on Borland/CodeGear outputs overly long line dgregor 1395 Write Tests for Python Bindings dgregor 1630 gcc-4.3: adjacency_list.hpp includes deprecated header dgregor 1832 unused parameter warning in dijkstra_shortest_paths.hpp dgregor 556 Bundled graph properties dgregor 732 Johnson All-Pairs needs better "no path" information dgregor 736 Const correctness violation djowel 1170 Emit Warnings instead of # symbols in the syntax highlighter djowel 1171 Quickbook title output djowel 1172 non-utf djowel 1176 Space after inline code djowel 1206 Escaping from within code? djowel 1273 CR+LF newlines in position_iterator djowel 1276 spirit problem with _GLIBCXX_DEBUG djowel 1277 Closing section like [pre with } causes Quickbok to crash djowel 1280 sections in imported source files get put inside <para> elements in docbook output djowel 1281 Quickbook produces invalid BoostBook/DocBook XML djowel 1324 tuple should have a swap() that operates element-by-element djowel 1396 wrong result_of invocation around transform_view djowel 1436 [quickbook] inline code inside headings djowel 1484 Quickbook produces illegal docbook for some docinfo fields. djowel 1500 [Spirit/Phoenix] C4512 Compiler warnings from VC8 djowel 1570 Some boost headers aren't ready for gcc 4.3 djowel 1600 duplicate include guard djowel 1601 distane of boost::tuple djowel 1607 Tuple Library Documentation Changes djowel 1610 [MSVC/STLport] [tree/common.hpp] Standard library requirements violation(incomplete type as vector parameter) djowel 1614 vector workaround needed for MSVC9 djowel 1617 spirit gcc-4.3 fix djowel 1619 [Fusion] C4512 warnings from VC9 (Visual Studio 2008) djowel 1651 incorrect typedefs in examples djowel 1722 [TR1/Fusion] Conflict between TR1 and Fusion headers djowel 1763 wrong AST when parser_tag==0 djowel 1764 wrong AST when parser_tag==0 djowel 1844 Quickbook matches forward slashes (for italics) with slashes in links dlwalker 613 boost/crc.hpp uses non-standard conforming syntax doug_gregor 1021 [Graph][reverse_graph] Problem using reverse_graph adapter with an adapted user defined graph doug_gregor 1076 compile error: disconnecting struct with operator()() doesn't work in VS2005 SP1 doug_gregor 375 LEDA graph adaptors do not handle hidden nodes properly doug_gregor 402 random_vertex/random_edge are unnecessarily inefficient doug_gregor 403 Document copy_component doug_gregor 447 reverse_graph and constness of property maps doug_gregor 708 Dijkstra no_init version should not require VertexListGraph doug_gregor 733 Numbered headers don't work with "preferred" syntax doug_gregor 735 Fruchterman-Reingold grid performance can be improved doug_gregor 738 Memory leaks with signal::connect? doug_gregor 829 Implicit graph not implement doug_gregor 852 Problem with Boost and GCC 4.1 ebf 1507 [variant] C4512 warnings from VC8.0 ebf 1548 [variant][docs]typo: formal arg_ operand_ should be v in times_two arglist ebf 1654 recursive variants do not handle nested variants correctly. ebf 993 Variant should use least common multiple of alignments_ rather than maximum eric_niebler 1796 compile error when SDL_syswm.h (from sdl library) is included before foreach.hpp fcacciola 1666 Visualizer for boost::optional garcia 1581 Boost.MultiArray: Resizing bug if the index is not 0-based garcia 1741 Review schedule out of date grafik 1041 Cygwin requires PATH setting. grafik 1322 trac rejects patch attachment as spam grafik 1406 Understanding the Tables outdated grafik 1417 Regresson tests hang in Darwin (Tiger) grafik 1430 Regression fails under Cygwin grafik 1433 Trac's spam detection rejects too many valid messages grafik 1512 Broken link to vacpp in bjam docs. grafik 1513 Broken link to bcpp in bjam docs. grafik 1576 cannot read non-ASCII output messages grafik 1577 Some commands don't work because hStdInput == 0 grafik 1663 build.bat cannot set/reset ERRORLEVEL grafik 1733 Website layout overlays on IE7 grafik 1735 [website] Wrong HTML on main documentation page. grafik 1738 Boost Jam details and download link grafik 1739 Search box and Google link grafik 1753 Python docs: bad link to the Jamroot grafik 1771 Statechart TOC mangled. grafik 1775 website bugs for 1.35.0 docs grafik 1776 Documentation page renders incorrectly in Safari 3.1 on OS X grafik 1799 Boost.Test docs missing reference pages grafik 616 Boost Jam_ and non english directorys grafik 959 linking fails when Boost is compiled with STLport 5.1.* on Linux (names mismatch) grafik 986 Problem building Python modules on boost 1.34.0 guwi17 1829 norm_2 may return QNAN if BOOST_UBLAS_SCALED_NORM is defined hkaiser 1079 boost-1.34.0 fails to compile. concept checks not satisfied. hkaiser 1670 wave almost unusably slow on real-world input igaztanaga 1080 boost::interprocess win32 global file mapping issue igaztanaga 1210 interprocess::barrier hangs during second use under linux (boost 1.33.1) igaztanaga 1390 Interpocess: managed shared memory failing completely under OS X igaztanaga 1634 boost::interprocess::vector cannot contain volatile int igaztanaga 1635 Incomplete include guard in boost/intrusive jmaurer 351 Diff in state of mersenne_twister gen between GCC3.41 & CW9 jmaurer 599 uniform_01 copies engine instead of using a reference johnmaddock 1081 Empty string rejected as perl-style regex johnmaddock 1446 POSIX API doesn't use C locale johnmaddock 1451 error: use of C99 long long integer constant jsiek 1531 segfault in dynamic_bitset::reference assign operator jsiek 1540 Poisson distribution very slow for large mean (and may also overflow). jsiek 1755 Boost.tokenizer is broken for wide characters - patch attached jsiek 1798 met an error using boost::tokenizer in multi-times in vs2005_ unicode jsiek 575 Calling subgraph::global_to_local on a root graph jsiek 636 strange compiling problem for transitive_closure jsiek 815 remove_edge core dumps on self-circle jsiek 875 No iterator based constructor for adjacency_matrix jsiek 900 graphml reader namespace handling is broken kaalus 1184 property_tree assignment (operator) bug kaalus 1604 property_tree xml parser doesn't compile with gcc kaalus 1678 Boost.property_tree::read_xml does not parse UNICODE file with BOMs marshall 1252 [pool] severe overhead with unaligned sizes. matias 1822 header dependency in boost/serialization/map.hpp nasonov 1220 lexical_cast requires RTTI nasonov 1704 [any] 4512 warning from VC8/9 on warning level 4 nasonov 754 boost::any - typeid comparison across shared boundaries nesotto 1629 range/iterator_range.hpp bug nesotto 1675 [range] VC8 - compiler warnings when including range/array headers nesotto 1694 NDEBUG vs. BOOST_ASSERT in iterator_range.hpp nesotto 1748 [ptr_container] compiler warnings from VC9 nesotto 1754 Illegal HTML in range docs. nesotto 1785 assign::list_of works poorly with class constructors nesotto 1795 [ptr_container] minor documentation typo nesotto 1842 boost::sub_rage::front error no-maintainer 1068 Mersenne twister disables streaming for Visual C++ no-maintainer 1222 lambda::ret<T> should declare result_type. no-maintainer 1270 uniform_smallint doesn't compile with lagged_fibonacci random number generators no-maintainer 1515 [lambda] C4512 warnings from VC8.0 no-maintainer 1544 uniform_01 w/ref template param causes ref to ref error no-maintainer 1546 Method boost::random::uniform_int::operator()(engine_ value) is missing no-maintainer 1572 [lambda] smart pointer const-ness affects its contents no-maintainer 1632 Default Interval rounding policies incomplete no-maintainer 1691 [Random] Brokem MSVC workaround no-maintainer 781 Lambda: (_1 + "y")(string("x")) Doesn't Compile no-maintainer 819 uniform_int<> with type's maximum availaible range error pavol_droba 1152 rle_example fails pavol_droba 1385 begin must be boost-qualified pavol_droba 1761 StringAlgo: Error in an example pavol_droba 1827 String algorithm composite header doesn't include join pdimov 1106 shared_ptr<T> should not convert to shared_ptr<U> when T* doesn't convert to U* ramey 1708 Can't serialize class with private destructor ramey 1734 BOOST_STATIC_WARNING can't be passed a dependent expression ramey 1747 [serialization] unreferenced formal parameter warnings from VC9 ramey 1807 boost::archive::xml_archive_exception does not store error code and reports wrong message text ramey 1812 Boost.Serialization fails to build on Cygwin ramey 1823 Archive concept: Incomplete description? ramey 1824 serialization keeps using wchar_t if BOOST_NO_STD_WSTRING is set ramey 1836 bug in serializing wide character strings ramey 1837 Base class missed in binary_wiarchive rogeeff 1383 signal.h features not found on Mac OS rogeeff 1542 [test] compiler errors when building with stdcxx library rogeeff 1644 Boost.Test missing documentation file BOOST_CHECK_CLOSE_FRACTION.html rogeeff 1676 Dead links on Boost.Test example documentation. rogeeff 1723 No subprocess can be started in init_unit_test_suite rogeeff 1746 Online documentation for 1.35.0 is out of date for current lib version rogeeff 1781 Empty page in Test documentation rogeeff 1839 Test fails if child process exits with non-zero code samuel_krempp 1699 Compile warning about initialization order. samuel_krempp 1801 Typo in documentation. samuel_krempp 859 boost::format ignores a user defined locale shammah 290 perfomance: memory cleanup for pool takes too long shammah 386 boost::pool_allocator breaks with vector of vectors speedsnail 1138 Problems with TSS and static thread library t_schwinger 1653 wave executable erroneously required for build of function_types lib troyer 1774 serialization: file written with 1.34.1 can't be read in with 1.35 troyer 1778 Possible regression in 1.35 serialization of 2D arrays turkanis 1523 [iostreams] VC8/VC9 compiler warnings turkanis 1545 [boost/rational.hpp] 'noskipws' is not a member of 'std' turkanis 1579 gzip compressor should model DualUseFilter turkanis 1580 Add static assert to prohibit instantiating a chain with mode dual_use turkanis 1649 Fix definition of JavaScript menu to avoid long chains of functions turkanis 1656 Consider implementing flush() for symmetric filters turkanis 1671 type mismatch of buffer size parameter causes overload resolution to fail turkanis 1727 Sample code in documentation does not compile_ has namespace errors. urzuga 574 [boost::lambda] Compile error with libstdc++ debug mode vladimir_prus 1132 program_options documentation error. vladimir_prus 1165 more quoting problems vladimir_prus 1274 Useless error message vladimir_prus 1527 [program_options] Second (and subsequent) lines in tabbed text not aligned correctly vladimir_prus 1530 Program options documentation - Overview - Syntactic Information example typo vladimir_prus 1537 no value given in 'mysql_password =' vladimir_prus 1584 cryptic bbv2 error building quickbook vladimir_prus 1587 [program_options] crashes if value part missing in external configuration file vladimir_prus 1588 [program_options] crashes if value part missing in external configuration file vladimir_prus 1645 Invalid unicode support for default_value vladimir_prus 1679 added 4-way universal binary support from mac osx (ppc_ ppc64_ i386_ x86_64) vladimir_prus 1809 Allow empty values in conf file vladimir_prus 1816 --build-type=complete broken in current svn vladimir_prus 469 multitoken broken vladimir_prus 689 [program_options] Endless loop with long default arguments vladimir_prus 850 program_options strips off escaped quotes in some situations witt 583 Fixes for build on IBM pSeries for AIX and Linux witt 834 Homepage regression links witt 957 The "Getting Started" page does not mention the stdlib option witt 973 zip_iterator has value_type == reference -- -- Marshall Marshall Clow Qualcomm, Inc. <mailto:mclow@qualcomm.com> The famous British scientist, Lord Kelvin, said: "When you measure what you are speaking about and express it in numbers, you know something about it, but when you cannot (or do not) measure it, when you cannot (or do not) express it in numbers, then your knowledge is of a meagre and unsatisfactory kind."

1 0

Current email Address for Hubert Holin?
by Paul A Bristow 22 Apr '08

22 Apr '08

I'm trying to contact Hubert Holin about the Math Toolkit. Last known address is 'hubert.holin(a)meteo.fr' Anyone have a current address? Thanks. Paul --- Paul A Bristow Prizet Farmhouse, Kendal, Cumbria UK LA8 8AB +44 1539561830 & SMS, Mobile +44 7714 330204 & SMS pbristow(a)hetp.u-net.com

1 0

boost.thread causes autolink to boost.datetime
by Peter Dimov 22 Apr '08

22 Apr '08

I see that much care went into Boost.Thread to make it header-only, but autolinking to Boost.DateTime kind of defeats the purpose. :-)

3 5

Extended RTTI with boost - and idea
by Sergey Sadovnikov 22 Apr '08

22 Apr '08

Hello all, There are many cases in the "real world" when developers need something like 'moc' utility from the Qt distribution. For example, such utility could add some extended RTTI into classes and structures, add auto-generated serialization/initialization/ assignment/comparation code, defines something like properties, and so one. I think it could be good idea to add something like 'moc' into boost distribution and to make it standard development tool. How could it works. Assume we have a code like this: class SomeClass { MIG_INFO; public: //... public MIG_MEMBERS: int Member1; double Member2; void SomeMethod1(); int SomeMethod2(int, double); protected MIG_MEMBERS: //... private MIG_MEMBERS: //... }; Here is 'MIG' (for example) is abbreviation of 'MetaInfo Generator'. After preprocess with 'mig' following code could be generated (in separated .cpp): // Retrieving members info for this class const std::vector<__MemberInfo>& SomeClass::__GetMembersInfo() { static std::vector<__MemberInfo> members = InitMembersInfo<SomeClass>(); return members; } // Runtime method invocation template<typename R> R SomeClass::__Invoke(const char* memberName) { // autogenerated methods invocation code } // __Invoke methods for another numbers of arguments // Autogenerated assignment operation void SomeClass::__Assign(const SomeClass& other) { Member1 = other.Member1; Member2 = other.Member2; } Declaration of this methods in the class scope hides with macros MIG_INFO (like Q_OBJECT in the QT). __MemberInfo is a struct wich contains some information about class member. Such as member name, member kind (method, data member), visibility (public, protected, private) and so on. MIG_MEMBERS is a macro which indicate what following members should be preprocessed by mig. It's just an idea how to bring more "zero-cost" extended RTTI into C++ with boost. -- Best regards Sergey mailto:flex_ferrum@artberg.ru

1 0

[mirror] announcement
by Matus Chochlik 22 Apr '08

22 Apr '08

Greetings, I would like to announce, that a very early version of 'mirror' library is available in the boost sandbox at http://svn.boost.org/svn/boost/sandbox/mirror/ . Mirror is a compile-time reflection library intended to be proposed as a boost library (in case of interest) at some point in the future. The current version of mirror allows to register and then reflect namespaces, types, typedefined types, classes, base classes, and class member attributes. It allows to inspect: - the name of a namespace and it's scope. - the base name of a type and it's scope (currently, types defined on the global scope, in a namespace and inside of a class are supported) - the list of base classes of a class, including the type of inheritance (virtual/non-virtual) and access type (private/protected/public) - the list of types of the member attributes (own or all, including inherited) - the names of the member attributes It allows to get and set the value of a member attribute. It supports attributes with getter/setter functions. It tries to be as less intrusive as possible, in some cases the reflected class does not need to be changed at all, even if it has non-public member attributes, in other cases a one line PP macro has to be inserted into the definition of the class. There are several examples, (some of them still incomplete and rather poorly commented), showing, how the library can be used. /libs/examples/registering/namespaces.cpp - shows how namespaces can be registered and which properties can be inspected. /libs/examples/registering/types.cpp - shows how to register types and typedefined types and how to get the meta-data describing them. /libs/examples/registering/classes.cpp - this is a fairly complicated example about registering and reflecting classes, base classes and various types of class member attributes. /libs/examples/registering/virtual_bases.cpp - shows how to register virtual base classes and how to access all member attributes, including the inherited ones. The examples were succesfully compiled with MS Visual C++ 2008EE, on Vista g++ 4.1.3, on Ubuntu There are unfortunatelly no jamfiles (yet). The (sore excuse for ;) ) documentation is still rather sketchy and currently contains only a basic overview and the goals of the library. As said, the library is still in early stages of development and many things may (and will) be changed yet. Anyway, I would certainly appreciate any opinions, constructive critique, ideas about new useful features, etc. Best regards, -- ________________ ::matus_chochlik

1 0

Various documentation fixes.
by Daniel James 22 Apr '08

22 Apr '08

Hello all, I've been looking through some of the documentation patches on Trac, and have gathered them together on a branch, along with a few small changes I've noticed recently. I've attached a patch, and you can see the individual changes at: http://svn.boost.org/trac/boost/log/branches/doc?rev=44585&stop_rev=44647 This touches the documentation for: Bimap Bjam Date Time Format Interprocess Intrusive Mpi Numeric/Conversion Optional Python Spirit Utility The changes are small and pretty obvious, so I'll merge them in at the end of the week if I don't hear any objections. thanks, Daniel

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