May 2015 - Boost-users - lists.preview.boost.org

Re: [Boost-users] threads and async questions and asnwers
by Victor Yankee 21 May '15

21 May '15

> > From: Michael Powell <mwpowellhtx(a)gmail.com> > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] threads and async questions and asnwers > Message-ID: > < > CAMEoF_FUUVLa1Cq9_kCRLB-bSRMhH1fni5ft71-4pU-qvAy4fQ(a)mail.gmail.com> > Content-Type: text/plain; charset=UTF-8 > > On Thu, May 21, 2015 at 4:18 PM, Victor Yankee > <victor.whiskey.yankee(a)gmail.com> wrote: > > Hello List, > > > > I have a thread with a class and its method that raises a "question" > signal > > and needs to wait with a timeout for an "answer" signal. > > > > There are several worker threads, some of which may be connected to the > > question signal. The answer signal will be raised by a worker thread > only if > > it knows the answer; it is possible that no worker thread knows the > answer > > so no answer signal will be raised (hence need for timeout). The > question > > thread cannot know which worker thread to ask. > > Sounds like a homework question to me. Besides which, the problem > statement pretty much spelled out where you likely need to focus. > This is not homework; your response was not helpful. > > > What is a good way to achieve this using boost 1.58 and/or C++11? I am > using > > g++ 4.9 on 64bit ubuntu 14.04. > > > > Thanks, > > Vic

1 0

String split behaviour
by Venkateswara Rao Sanaka 21 May '15

21 May '15

Hi, I am getting two empty strings from the following program, void boost_split_test() { const string &text("-"); vector<string> tokens; split(tokens, text, boost::is_any_of("-"), token_compress_on); cout << "size of tokens " << tokens.size() << '\n'; for (auto const &e : tokens) cout << e.size() << '\n'; } Output: size of tokens 2 0 0 Is this expected output? I expecting an zero split parts. Could someone clarify? -- Thanks, :) Venki.

2 2

Does lock-less queue wait on empty queue ?
by Ran Shalit 21 May '15

21 May '15

Hello, I'm newbie of boost library. I would like to ask if the lockless queue waits on empty queue ? (I actually need it to wait). And another thing: Can the Pool library be build separately, so that I can use only the boost/pool files or do I need to use all boost sources in order to build just the pool. Thank you, Ran

6 6

[boost][algorithm] Overload of boost::algorithm::all_of_equal
by dariomt＠gmail.com 21 May '15

21 May '15

Hi list, I usually find useful an overload of this function to check whether all elements in a range are equal *to each other*. Something like: template <typename Range> bool all_of_equal(const Range & r) { // return true on empty range if (boost::empty(r)) return true; // return true if all other elements are equal to the first element return boost::all_of_equal( boost::next( boost::begin(r) ), boost::end(r), *boost::begin(r)); } Would this be a useful addition to Boost.Algorithm?

2 1

How to call destructor on thread object?
by Lane 21 May '15

21 May '15

I'm using the boost meta state machine and upon entry of this state, I create two threads, and stop these threads in the on_exit(). In on_entry(), I call the functors of each class and create threads and add those to a boost thread_group. What I need to do now is call the destructor of the objects on the threads ( of ClassA and ClassB) within on_exit(). I'm unclear as to how the destructors of the objects would/should be called when interrupting the threads. The destructors are currently not being called. struct MyEvent : public msm::front::state<> { template <class Event, class FSM> void on_entry(Event const&, FSM&); template <class Event, class FSM> void on_exit(Event const&, FSM&); boost::thread_group threads; }; template <class Event, class FSM> void psm_::MyEvent::on_entry(Event const& ev, FSM& sm) { auto bb = std::make_shared<bounded_buffer<MyData> >(100); ClassA<bounded_buffer<MyData> > c_a(bb); ClassB<bounded_buffer<MyData> > c_b(bb); threads.add_thread(new boost::thread(c_a)); threads.add_thread(new boost::thread(c_b)); } template <class Event, class FSM> void psm_::MyEvent::on_exit(Event const& ev, FSM& sm) { threads.interrupt_all(); threads.join_all(); } template <class Buffer> class ClassB { private: typedef typename Buffer::value_type value_type; shared_ptr<Buffer> m_container; public: ClassB(shared_ptr<Buffer> buffer) : m_container(buffer) { } ~ClassB() { // ... } void operator()() { try { // ... do stuff boost::this_thread::interruption_point(); } catch(const boost::thread_interrupted&) { // ... } } }

3 8

Is it Okay to Use the Boost Logo?
by stellarpower＠googlemail.com 19 May '15

19 May '15

Hello all, Just a quick question, as I couldn't find any compiled binaries for mingw32 I ended up compiling Boost and I was thinking of putting the compiled libraries online, probably on Sourceforge, to save others from the effort. Of course, I'll be making it clear that they're not official or anything. Is it okay for me to use the Boost logo on the project page? Thanks

1 0

"see reference to class template instantiation '...' being compiled" was shown
by Kaosun DJ 19 May '15

19 May '15

Hello, When I executed b2.exe, a message as "see reference to class template instantiation '...' being compiled" was shown. Were any libraries required? My environment is - Windows 8.1 64 bit (version 6.3 build 9600) (ja-JP) - Microsoft Visual Studio Express 2013 for Windows Desktop (version 12.0.30723.00 Update 3) (ja-JP) The reply of b2.exe is as follows. compile-c-c++ bin.v2\libs\serialization\build\msvc-12.0\debug\link-static\runtime-link-static\threading-multi\xml_grammar.obj xml_grammar.cpp C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2798) : warning C4996: 'std::_Equal1': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2783) : see declaration of 'std::_Equal1' c:\users\kaosun.earthgroove\downloads\temp\boost_1_58_0\libs\serialization\src\basic_xml_grammar.ipp(452) : see reference to class template instantiation 'bool std::equal<std::_String_iterator<std::_String_val<std::_Simple_types<char>>>,const char*>(_InIt1,_InIt1,_InIt2)' being compiled with [ _InIt1=std::_String_iterator<std::_String_val<std::_Simple_types<char>>> , _InIt2=const char * ] c:\users\kaosun.earthgroove\downloads\temp\boost_1_58_0\libs\serialization\src\basic_xml_grammar.ipp(438): while compiling class template member function 'void boost::archive::basic_xml_grammar<char>::init(std::basic_istream<char,std::char_traits<char>> &)' libs\serialization\src\xml_grammar.cpp(51) : see reference to class template instantiation 'boost::archive::basic_xml_grammar<char>' being compiled : : Snip : : compile-c-c++ bin.v2\libs\serialization\build\msvc-12.0\debug\link-static\runtime-link-static\threading-multi\xml_iarchive.obj xml_iarchive.cpp C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2798) : warning C4996: 'std::_Equal1': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2783) : see declaration of 'std::_Equal1' C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/impl/basic_xml_iarchive.ipp(67) : see reference to class template instantiation 'bool std::equal<std::_String_iterator<std::_String_val<std::_Simple_types<char>>>,const char*>(_InIt1,_InIt1,_InIt2)' being compiled with [ _InIt1=std::_String_iterator<std::_String_val<std::_Simple_types<char>>> , _InIt2=const char * ] C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/impl/basic_xml_iarchive.ipp(45): while compiling class template member function 'void boost::archive::basic_xml_iarchive<Archive>::load_end(const char *)' with [ Archive=boost::archive::xml_iarchive ] C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/xml_iarchive.hpp(50) : see reference to class template instantiation 'boost::archive::basic_xml_iarchive<Archive>' being compiled with [ Archive=boost::archive::xml_iarchive ] C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/xml_iarchive.hpp(132) : see reference to class template instantiation 'boost::archive::xml_iarchive_impl<boost::archive::xml_iarchive>' being compiled compile-c-c++ bin.v2\libs\serialization\build\msvc-12.0\debug\link-static\runtime-link-static\threading-multi\xml_oarchive.obj xml_oarchive.cpp C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2132) : warning C4996: 'std::_Copy_impl': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2113) : see declaration of 'std::_Copy_impl' C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/impl/xml_oarchive_impl.ipp(84) : see reference to class template instantiation '_OutIt std::copy<boost::archive::iterators::xml_escape<const char *>,boost::archive::iterators::ostream_iterator<char>>(_InIt,_InIt,_OutIt)' being compiled with [ _OutIt=boost::archive::iterators::ostream_iterator<char> , _InIt=boost::archive::iterators::xml_escape<const char *> ] C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/impl/xml_oarchive_impl.ipp(74): while compiling class template member function 'void boost::archive::xml_oarchive_impl<boost::archive::xml_oarchive>::save(const std::string &)' C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/xml_oarchive.hpp(123) : see reference to class template instantiation 'boost::archive::xml_oarchive_impl<boost::archive::xml_oarchive>' being compiled C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2113) : see declaration of 'std::_Copy_impl' C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/iterators/mb_from_wchar.hpp(91) : warning C4996: 'wctomb': This function or variable may be unsafe. Consider using wctomb_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\stdlib.h(567) : see declaration of 'wctomb' C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/iterators/mb_from_wchar.hpp(85): while compiling class template member function 'void boost::archive::iterators::mb_from_wchar<boost::archive::iterators::xml_escape<InputIterator>>::fill(void)' with [ InputIterator=const wchar_t * ] C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/iterators/mb_from_wchar.hpp(65) : see reference to class template instantiation 'void boost::archive::iterators::mb_from_wchar<boost::archive::iterators::xml_escape<InputIterator>>::fill(void)' being compiled with [ InputIterator=const wchar_t * ] C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/impl/xml_oarchive_impl.ipp(45) : see reference to class template instantiation 'boost::archive::iterators::mb_from_wchar<boost::archive::iterators::xml_escape<InputIterator>>' being compiled with [ InputIterator=const wchar_t * ] : : Snip : : compile-c-c++ bin.v2\libs\serialization\build\msvc-12.0\debug\link-static\runtime-link-static\threading-multi\basic_text_woprimitive.obj basic_text_woprimitive.cpp C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2132) : warning C4996: 'std::_Copy_impl': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2113) : see declaration of 'std::_Copy_impl' C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/impl/basic_text_oprimitive.ipp(67) : see reference to class template instantiation '_OutIt std::copy<boost::archive::iterators::insert_linebreaks<boost::archive::iterators::base64_from_binary<boost::archive::iterators::transform_width<const char *,6,8,char>,char>,76,const char>,boost::archive::iterators::ostream_iterator<CharType>>(_InIt,_InIt,_OutIt)' being compiled with [ _OutIt=boost::archive::iterators::ostream_iterator<CharType> , _InIt=boost::archive::iterators::insert_linebreaks<boost::archive::iterators::base64_from_binary<boost::archive::iterators::transform_width<const char *,6,8,char>,char>,76,const char> ] C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/impl/basic_text_oprimitive.ipp(33): while compiling class template member function 'void boost::archive::basic_text_oprimitive<std::wostream>::save_binary(const void *,size_t)' libs\serialization\src\basic_text_woprimitive.cpp(30) : see reference to class template instantiation 'boost::archive::basic_text_oprimitive<std::wostream>' being compiled compile-c-c++ bin.v2\libs\serialization\build\msvc-12.0\debug\link-static\runtime-link-static\threading-multi\text_wiarchive.obj text_wiarchive.cpp compile-c-c++ bin.v2\libs\serialization\build\msvc-12.0\debug\link-static\runtime-link-static\threading-multi\text_woarchive.obj text_woarchive.cpp compile-c-c++ bin.v2\libs\serialization\build\msvc-12.0\debug\link-static\runtime-link-static\threading-multi\utf8_codecvt_facet.obj utf8_codecvt_facet.cpp compile-c-c++ bin.v2\libs\serialization\build\msvc-12.0\debug\link-static\runtime-link-static\threading-multi\xml_wgrammar.obj xml_wgrammar.cpp C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2798) : warning C4996: 'std::_Equal1': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2783) : see declaration of 'std::_Equal1' c:\users\kaosun.earthgroove\downloads\temp\boost_1_58_0\libs\serialization\src\basic_xml_grammar.ipp(452) : see reference to class template instantiation 'bool std::equal<std::_String_iterator<std::_String_val<std::_Simple_types<wchar_t>>>,const char*>(_InIt1,_InIt1,_InIt2)' being compiled with [ _InIt1=std::_String_iterator<std::_String_val<std::_Simple_types<wchar_t>>> , _InIt2=const char * ] c:\users\kaosun.earthgroove\downloads\temp\boost_1_58_0\libs\serialization\src\basic_xml_grammar.ipp(438): while compiling class template member function 'void boost::archive::basic_xml_grammar<wchar_t>::init(std::basic_istream<wchar_t,std::char_traits<wchar_t>> &)' libs\serialization\src\xml_wgrammar.cpp(51) : see reference to class template instantiation 'boost::archive::basic_xml_grammar<wchar_t>' being compiled compile-c-c++ bin.v2\libs\serialization\build\msvc-12.0\debug\link-static\runtime-link-static\threading-multi\xml_wiarchive.obj xml_wiarchive.cpp C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2132) : warning C4996: 'std::_Copy_impl': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2113) : see declaration of 'std::_Copy_impl' C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/impl/xml_wiarchive_impl.ipp(61) : see reference to class template instantiation '_OutIt std::copy<boost::archive::iterators::mb_from_wchar<std::_String_const_iterator<std::_String_val<std::_Simple_types<wchar_t>>>>,char*>(_InIt,_InIt,_OutIt)' being compiled with [ _OutIt=char * , _InIt=boost::archive::iterators::mb_from_wchar<std::_String_const_iterator<std::_String_val<std::_Simple_types<wchar_t>>>> ] C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2798) : warning C4996: 'std::_Equal1': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2783) : see declaration of 'std::_Equal1' C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/impl/basic_xml_iarchive.ipp(67) : see reference to class template instantiation 'bool std::equal<std::_String_iterator<std::_String_val<std::_Simple_types<wchar_t>>>,const char*>(_InIt1,_InIt1,_InIt2)' being compiled with [ _InIt1=std::_String_iterator<std::_String_val<std::_Simple_types<wchar_t>>> , _InIt2=const char * ] C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/impl/basic_xml_iarchive.ipp(45): while compiling class template member function 'void boost::archive::basic_xml_iarchive<Archive>::load_end(const char *)' with [ Archive=boost::archive::xml_wiarchive ] C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/xml_wiarchive.hpp(64) : see reference to class template instantiation 'boost::archive::basic_xml_iarchive<Archive>' being compiled with [ Archive=boost::archive::xml_wiarchive ] C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/xml_wiarchive.hpp(146) : see reference to class template instantiation 'boost::archive::xml_wiarchive_impl<boost::archive::xml_wiarchive>' being compiled C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/iterators/mb_from_wchar.hpp(91) : warning C4996: 'wctomb': This function or variable may be unsafe. Consider using wctomb_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\stdlib.h(567) : see declaration of 'wctomb' C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/iterators/mb_from_wchar.hpp(85): while compiling class template member function 'void boost::archive::iterators::mb_from_wchar<std::_String_const_iterator<std::_String_val<std::_Simple_types<wchar_t>>>>::fill(void)' C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/iterators/mb_from_wchar.hpp(65) : see reference to class template instantiation 'void boost::archive::iterators::mb_from_wchar<std::_String_const_iterator<std::_String_val<std::_Simple_types<wchar_t>>>>::fill(void)' being compiled C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/impl/xml_wiarchive_impl.ipp(56) : see reference to class template instantiation 'boost::archive::iterators::mb_from_wchar<std::_String_const_iterator<std::_String_val<std::_Simple_types<wchar_t>>>>' being compiled compile-c-c++ bin.v2\libs\serialization\build\msvc-12.0\debug\link-static\runtime-link-static\threading-multi\xml_woarchive.obj xml_woarchive.cpp C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2132) : warning C4996: 'std::_Copy_impl': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators' C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2113) : see declaration of 'std::_Copy_impl' C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/impl/xml_woarchive_impl.ipp(89) : see reference to class template instantiation '_OutIt std::copy<boost::archive::iterators::xml_escape<const wchar_t *>,boost::archive::iterators::ostream_iterator<wchar_t>>(_InIt,_InIt,_OutIt)' being compiled with [ _OutIt=boost::archive::iterators::ostream_iterator<wchar_t> , _InIt=boost::archive::iterators::xml_escape<const wchar_t *> ] C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/impl/xml_woarchive_impl.ipp(75): while compiling class template member function 'void boost::archive::xml_woarchive_impl<boost::archive::xml_woarchive>::save(const std::wstring &)' C:\Users\kaosun.EARTHGROOVE\Downloads\temp\boost_1_58_0\boost/archive/xml_woarchive.hpp(140) : see reference to class template instantiation 'boost::archive::xml_woarchive_impl<boost::archive::xml_woarchive>' being compiled C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\xutility(2113) : see declaration of 'std::_Copy_impl' : : Snip : : compile-c-c++ bin.v2\libs\serialization\build\msvc-12.0\release\link-static\runtime-link-static\threading-multi\xml_oarchive.obj xml_oarchive.cpp .\boost/archive/iterators/mb_from_wchar.hpp(91) : warning C4996: 'wctomb': This function or variable may be unsafe. Consider using wctomb_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\stdlib.h(567) : see declaration of 'wctomb' .\boost/archive/iterators/mb_from_wchar.hpp(85): while compiling class template member function 'void boost::archive::iterators::mb_from_wchar<boost::archive::iterators::xml_escape<InputIterator>>::fill(void)' with [ InputIterator=const wchar_t * ] .\boost/archive/iterators/mb_from_wchar.hpp(65) : see reference to class template instantiation 'void boost::archive::iterators::mb_from_wchar<boost::archive::iterators::xml_escape<InputIterator>>::fill(void)' being compiled with [ InputIterator=const wchar_t * ] .\boost/archive/impl/xml_oarchive_impl.ipp(45) : see reference to class template instantiation 'boost::archive::iterators::mb_from_wchar<boost::archive::iterators::xml_escape<InputIterator>>' being compiled with [ InputIterator=const wchar_t * ] .\boost/archive/impl/xml_oarchive_impl.ipp(58) : see reference to class template instantiation 'void boost::archive::save_iterator<const _Elem*>(std::ostream &,InputIterator,InputIterator)' being compiled with [ _Elem=wchar_t , InputIterator=const wchar_t * ] .\boost/archive/impl/xml_oarchive_impl.ipp(54): while compiling class template member function 'void boost::archive::xml_oarchive_impl<boost::archive::xml_oarchive>::save(const std::wstring &)' .\boost/archive/xml_oarchive.hpp(123) : see reference to class template instantiation 'boost::archive::xml_oarchive_impl<boost::archive::xml_oarchive>' being compiled : : Snip : : compile-c-c++ bin.v2\libs\serialization\build\msvc-12.0\release\link-static\runtime-link-static\threading-multi\xml_wiarchive.obj xml_wiarchive.cpp .\boost/archive/iterators/mb_from_wchar.hpp(91) : warning C4996: 'wctomb': This function or variable may be unsafe. Consider using wctomb_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\stdlib.h(567) : see declaration of 'wctomb' .\boost/archive/iterators/mb_from_wchar.hpp(85): while compiling class template member function 'void boost::archive::iterators::mb_from_wchar<std::_String_const_iterator<std::_String_val<std::_Simple_types<wchar_t>>>>::fill(void)' .\boost/archive/iterators/mb_from_wchar.hpp(65) : see reference to class template instantiation 'void boost::archive::iterators::mb_from_wchar<std::_String_const_iterator<std::_String_val<std::_Simple_types<wchar_t>>>>::fill(void)' being compiled .\boost/archive/impl/xml_wiarchive_impl.ipp(56) : see reference to class template instantiation 'boost::archive::iterators::mb_from_wchar<std::_String_const_iterator<std::_String_val<std::_Simple_types<wchar_t>>>>' being compiled

2 2

[thread] Do we can a non backward compatible version with non-blocking futures?
by Vicente J. Botet Escriba 18 May '15

18 May '15

Hi, in Boost 1.58 I fixed some issues as the result of the async and future<T>:then() was not a blocking future as the documentation described. However the implementation is horrible and I suspect that it is subject to deadlocks. BTW, I added already some fixes on the develop branch. Sometime ago I started in a branch an implementation that don't use blocking futures [1]. Well the implementation is also horrible after making futures non-blocking, but less ;-) The problem is that now I have some issues with the executors :( Anyway, Gor has told me that with the blocking implementation he is unable to define await_suspend (using resumable functions) >It is just if .then returns a blocking future, I cannot subscribe a callback to .then in await_suspend. >await_suspend(f, cb) { > f.then(cb); >} &will block here preventing coroutine from suspending I don't know yet if he will reach to configure boost::future<T> on the non-blocking branch. My question is if the Boost community will accept (or even wants) a breaking change on a near release (when I would reach to fix the executors issues) including non-blocking futures instead of the current blocking futures. Best, Vicente [1] https://github.com/boostorg/thread/tree/feature/non_blocking_futures

1 0

Broken web site documentation link
by Bennet Fauber 18 May '15

18 May '15

>From this page, http://www.boost.org/doc/libs/1_58_0/tools/build/index.html there is a link called "Documentation" under the Boost Build graphic that purports to link to http://www.boost.org/doc/libs/1_58_0/tools/build/doc/html/index.html but clicking on that link yields the following web page: ========================== 404 Not Found File "/home/www/live.boost.org/common/code/../../doc/archives/boost_1_58_0/tools/build/doc/html/index.html" not found. Unable to find file. ========================== Sorry for posting to the wrong place is if this is not it. -- bennet

1 0

Boost Phoenix & language lambdas
by Robert Jones 16 May '15

16 May '15

I'm sure this has been asked before, and apologies in advance to the programming gods of Boost.Phoenix, but has Phoenix effectively been replaced by language lambdas, or are there still things for which Phoenix is the best answer? Thx, Rob.

3 2