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Re: [Boost-users] [statechart] Is it possible to have nested (sub)states in an asynchronous state machine?
by Igor R 15 Jun '11

15 Jun '11

> Thanks for the recommendation. The problem turned out to be indeed with > forward declarations. I wish the compilation errors were somewhat more > informative, so that I could find the root cause of the problem easily. I don't know what compiler you used and what your real code looked like, but when I tried to compile some portions of your sample code with VC10, I got a lot of "use of undefined type" errors.

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Re: [Boost-users] [statechart] Is it possible to have nested (sub)states in an asynchronous state machine?
by Gurcan Gulesir 15 Jun '11

15 Jun '11

Thanks for the recommendation. The problem turned out to be indeed with forward declarations. I wish the compilation errors were somewhat more informative, so that I could find the root cause of the problem easily. -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Igor R Sent: donderdag 9 juni 2011 18:33 To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] [statechart] Is it possible to have nested (sub)states in an asynchronous state machine? > Putting everything into one file, surprisingly for me, solved my problem of > not being able to nest a sub-state under a super state. Now I need to figure > out why the previous implementation (i.e., the one distributed over multiple > files) does not compile. I guess you try to use undefined (forward-declared) types in contexts where they cannot be used. _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

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asio ssl peer authentication, check which certificate is really authenticated
by Lloyd 15 Jun '11

15 Jun '11

Hi, I have gone through the asio ssl client and server sample and modified. The modification I have done is, added one more certificate to the client by using "ctx.load_verify_file("another_cert.pem");" Now I have two server certificates loaded for server authentication. These are self signed certificate. But in client is there any way to know which server is authenticated? In real case we will be using this for client-authentication, to know what kind of client is connected to the server. We have two types of client, and one client has only restricted privileges. Thanks, Lloyd

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Boost filesystem v3 with Qt.
by Surya Kiran Gullapalli 15 Jun '11

15 Jun '11

Hello, Sorry for cross-posting. I'm facing an issue with Qt (4.7.2, installed from Qt installer) with Boost.Filesystem v3 (1.46.1) on VS2008. I'm facing linker errors with QString::toStdWString when /Zc:wchar_t is set like this: unresolved external symbol "__declspec(dllimport) public: class std::basic_string<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> > __thiscall QString::toStdWString(void)const " (__imp_?toStdWString@QString@@QBE?AV?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@XZ) referenced in function "private: void __thiscall DirView::readDirectory(class QModelIndex const &)" (?readDirectory@DirView@@AAEXABVQModelIndex@@@Z) and linker errors with std::codecvt when /Zc:wchar_t- is set like this: unresolved external symbol "__declspec(dllimport) public: static class std::codecvt<unsigned short,char,int> const & __cdecl boost::filesystem3::path::codecvt(void)" (__imp_?codecvt@path@filesystem3@boost@@SAABV?$codecvt@GDH@std@@XZ) referenced in function "public: __thiscall boost::filesystem3::path::path<class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > >(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &,void *)" (??$?0V?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@path@filesystem3@boost@@QAE@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@PAX@Z) How can i use Qt with boost filesystem ? Thanks in advance, Surya

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fast_pool_allocator question
by steviekm3 14 Jun '11

14 Jun '11

I was wondering if fast_pool_allocator will speed something up. I have a funtion say g which looks like: void g( Params p ) { std::map<double,Foo> m; for( int i = 0; i < 100000; ++it ) { m.insert( ... ) } } g gets called from about 100 different threads running on 16 processor machine. All the processors are not being used near full capacity. I did some analysis and find that most of the time one thread is in malloc system call and other threads are blocking on it. ( I guess malloc only allows serial access a certain points ). Would a fast_pool_allocator speed this up. Could I pre-allocate the memory needed using a fast_pool_allocator ? I don't want the pool to return memory to the system. Just to reuse memory that is no longer needed ( reuse memory that m has used after m goes out of scope ). -- View this message in context: http://boost.2283326.n4.nabble.com/fast-pool-allocator-question-tp3596247p3… Sent from the Boost - Users mailing list archive at Nabble.com.

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Boost::Asio crashes all the time when starting multiple connections
by Andi Clemens 14 Jun '11

14 Jun '11

Hi, I have started to write a ProxyServer that analyzes TDS-packages sent from the Microsoft SQLServer Management Studio to a MS SQLServer. It seems to work fine for one or two connections, but if more connections are openend, boost suddenly crashes, mostly in the bind-template.hpp: template<class A1, class A2> result_type operator()(A1 const & a1, A2 const & a2) { list2<A1 const &, A2 const &> a(a1, a2); CRASH ===> BOOST_BIND_RETURN l_(type<result_type>(), f_, a, 0); } I have modified the code from the examples page: http://www.boost.org/doc/libs/1_46_1/doc/html/boost_asio/example/echo/async… I only added a second socket in the session class for handling the connection to the SQLServer. When I start SSMS and click on "New query", I can see two additional connections being opened, and then the program crashes. I have posted the source code here: session.h : http://pastebin.com/eC5fn7U8 session.cpp : http://pastebin.com/LDnQqCNr server.h: http://pastebin.com/1fDJU6sx server.cpp: http://pastebin.com/seMAVx4D ProxyServer.cpp: http://pastebin.com/8S7YfE8L Am I doing something wrong? Maybe the code isn't threadsafe? I'm new to boost::asio and I might have missed an important point here. Maybe I need more than one io_service object? Andi -- Using Opera's revolutionary email client: http://www.opera.com/mail/

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Re: [Boost-users] [chrono] Can not build with intel-win
by Edward Rankin 14 Jun '11

14 Jun '11

On Mon, Jun 13, 2011 at 3:55 PM, <boost-users-request(a)lists.boost.org>wrote: > Message: 6 > Date: Mon, 13 Jun 2011 08:10:45 +0100 > From: Bo Jensen <jensen.bo(a)gmail.com> > To: boost-users(a)lists.boost.org > Subject: [Boost-users] [chrono] Can not build with intel-win > Message-ID: <BANLkTim7efYQfM=FhFi9m5Q2i0g8L5XG5A(a)mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > Newest intel C++ release and vs2010, can not build with chrono from trunk. > > I get : > > pnet.cpp > ..\..\..\external\boost\boost/chrono/duration.hpp(94): error: expected > an expression > && (boost::is_convertible<Rep2, > ^ > > ..\..\..\external\boost\boost/chrono/duration.hpp(124): error: > expected an expression > && (boost::is_convertible<Rep, > ^ > > compilation aborted for ..\network\pnet.cpp (code 2) > > call "C:\Program Files > (x86)\Intel\ComposerXE-2011\bin\intel64//iclvars.bat" > nul > icl @"bin\intel-win\release\threading-multi\pnet.obj.rsp" > > ...failed compile-c-c++ bin\intel-win\release\threading-multi\pnet.obj... > ...failed updating 1 target... > > > Any suggestions welcome. > > Thanks > /Bo > Yes, I get this error too. The latest beta from Intel still exhibits this problem, but I currently do not have any insight on how to fix this. Perhaps you could create a bug report. Edward

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does composite_key_compare support an interface that enables comparsion of the whole tuple
by brijesh.sharma＠thomsonreuters.com 14 Jun '11

14 Jun '11

Hi, Here is what I am trying to do typedef DWORD DSIid; enum DSType { DSTypeNone = 0, DSTypeBegin, DSTypeRoot } struct SDSIOwnedByKey { SDSIOwnedByKey(DSType DSTypeOwned, DSIid DSIidOwned, DSType DSTypeOwner, DSIid DSIidOwner) : m_DSTypeOwned(DSTypeOwned), m_DSIidOwned(DSIidOwned), m_DSTypeOwner(DSTypeOwner), m_DSIidOwner(DSIidOwner) { } bool operator == (const SDSIOwnedByKey &rcComp) const { return m_DSTypeOwned == rcComp.m_DSTypeOwned && m_DSIidOwned == rcComp.m_DSIidOwned && m_DSTypeOwner == rcComp.m_DSTypeOwner && m_DSIidOwner == rcComp.m_DSIidOwner; } DSType m_DSTypeOwned; DSIid m_DSIidOwned; DSType m_DSTypeOwner; DSIid m_DSIidOwner; }; class DataStore { typedef boost::multi_index_container< SDSIOwnedByKey, boost::multi_index::indexed_by< boost::multi_index::ordered_unique<boost::multi_index::tag<ByOwnedTypeOw nerTypeOwnerIdOwnedId>, boost::multi_index::composite_key<SDSIOwnedByKey, boost::multi_index::member<SDSIOwnedByKey, DSType, &SDSIOwnedByKey::m_DSTypeOwned>, boost::multi_index::member<SDSIOwnedByKey, DSType, &SDSIOwnedByKey::m_DSTypeOwner>, boost::multi_index::member<SDSIOwnedByKey, DSIid, &SDSIOwnedByKey::m_DSIidOwner>, boost::multi_index::member<SDSIOwnedByKey, DSIid, &SDSIOwnedByKey::m_DSIidOwned> >, boost::multi_index::composite_key_compare<std::less<DSType>,std::less<DS Type>, std::less<DSIid>, std::greater<DSIid>> > > > TOwnedBySort; typedef typename TOwnedBySort::index<ByOwnedTypeOwnerTypeOwnerIdOwnedId>::type OwnedBySort_ByOwnedTypeOwnerTypeOwnerId; TOwnedBySort m_oOwnedBySort; }; Instead of >, boost::multi_index::composite_key_compare<std::less<DSType>,std::less<DS Type>, std::less<DSIid>, std::greater<DSIid>> I want to write a compare function that compared all the values in one function, like a complete record comparison something like >, boost::multi_index::composite_key_compare<SDSIOwnedByKey> And have an appropriate function which would get the whole record to compare Thanks Brijesh

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[Boost Serialization] Problem serializing derived class declared in DLL
by kmdarkmaster 13 Jun '11

13 Jun '11

Dear Boost community, My problem is simple : I need to serialize a derived class (named Plugin) of a c++ class (named Base) in my main program. The derived class Plugin is declared in a DLL which is load explicitely during execution. I tried to use the macro BOOST_CLASS_EXPORT_GUID (as in the doc), this works perfectly if the derived class is in the main execution, but will give me an exception if the derived class is in the plugin DLL. Forgive me if the problem is too obvious, this is my first time using Boost and I'm still a big noob in c++. Here is my code : IN THE MAIN EXECUTION : Class Base (parent class) : Base.h : #pragma once; #include "boost\serialization\access.hpp" #include <boost\serialization\nvp.hpp> class Base { private: friend class boost::serialization::access; template void serialize(Archive & ar, const unsigned int version){} public: int a, b; Base(); virtual ~Base() { } virtual void func()= 0; // this is an abstract base class } Base.cpp: #include "StdAfx.h" #include "Base.h" Base::Base(){ a=0; b=0; } IN THE DLL (loaded explicitely) Class Plugin (Child Class) : Plugin.h: #pragma once #include "boost\serialization\access.hpp" #include <boost\serialization\nvp.hpp> #include "boost\serialization\export.hpp" #include "Base.h" class Plugin: public Base { private: friend class boost::serialization::access; template void serialize(Archive & ar, const unsigned int version){ ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(Base); ar & BOOST_SERIALIZATION_NVP(a); ar & BOOST_SERIALIZATION_NVP(b); } public: virtual void func(); }; BOOST_CLASS_EXPORT_GUID(Plugin, "Plugin") Plugin.cpp: #include "StdAfx.h" #include "Plugin.h" void Plugin::func(){ a= 5; b= 6; } THE MAIN FUNCTION (IN THE MAIN EXECUTION): ....................................... HINSTANCE hinst= LoadLibrary(L"monDLLdynamique.dll"); if (hinst) { CreatePlugin ctor= (CreatePlugin)GetProcAddress(hinst, "CreatePlugin"); Base *test= ctor(); std::ofstream ofs3("FichierPointeursDerivedDLL.xml"); { boost::archive::xml_oarchive oa(ofs3); oa << BOOST_SERIALIZATION_NVP(test); } ofs3.close(); delete test; // calls Plugin's dtor FreeLibrary(hinst); } ............................................ Any help will be very very appreciated !!! Thanks -- View this message in context: http://boost.2283326.n4.nabble.com/Boost-Serialization-Problem-serializing-… Sent from the Boost - Users mailing list archive at Nabble.com.

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OSCON 2011
by Robert Ramey 13 Jun '11

13 Jun '11

http://www.oscon.com/oscon2011 I wonder if in the interest of evangilizing C++/etc. anyone would be interested in exhibiting on behalf of boost here? Robert Ramey

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