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ASIO port to MQX
by Nick Geoca 06 Apr '11

06 Apr '11

Does anybody know if this has been done or the duration it might take? Thanks Boost Community

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Moderator Query (was: Boost.Regex Build Failure with CPP Locale and No Win32 on WinXP using Visual Studio 2010 SP1)
by David Hauck 06 Apr '11

06 Apr '11

Hello, I'm a new boost-users registrant and had a question regarding the list. Specifically, I sent a message yesterday morning (subject above) that appeared on gmane, but was not received via email. I've checked that I have received all other posts (i.e., gmane and my email for boost-users is consistent other than for the message I sent). Is there any explanation for this (I've verified this message wasn't received locally and marked as spam or otherwise moved by our Exchange server)? Also, I've noticed a couple different subject formats, specifically related to referencing the library name. The policy document suggests referencing libraries as (e.g.) Boost.Regex, but also as (e.g.) [regex] in the subject. It looks like the latter is preferred for subject text. Is this correct? Thanks for your help! -David

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boost interprocess - managed_shared_memory - min segment size
by aidan mcgurn 06 Apr '11

06 Apr '11

Hi, i was wondering what/is there a minimum segment size that can be passed in here: managed_shared_memory(create_only, segmentName, segment size) For example i have seen when i set this to say 30 (30 bytes), i get a segmentation error, not here but on the following line where i try to create the mutex: boost::shared_mutex *mtx = segment.find_or_construct<boost::shared_mutex>("mtx")(); The point been, its not thrown an exception inside managed_shared_memory. However if i set this to 500, then i do get an exception which i catch and print: boost::interprocess_exception::library_error - error_code = 2; native error = 0 Looking at the error codes in error_code_t, 2 = "other_error, // library generated error" So this isn't even a size_error which i can catch and try to resize with? (not sure why this happens then and not for 30 - library generated error code is unclear in this case) If i set this to 700, then it all works fine. So i'm a/ wondering whats going on here b/ is there a minimum segment size? thanks. /aidan

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boost::shared_ptr für symbian
by Ming Lu 06 Apr '11

06 Apr '11

Hello everybody, i used boost::shared_ptr from boost 1.40 for my symbian project. after upgrade of boost to 1.46.0 do i have a compile-error: /In file included from ..//..//dev-environment//libs//cpp//boost//1.46.0/boost/config.hpp:53, from ..//..//dev-environment//libs//cpp//boost//1.46.0/boost/smart_ptr/shared_ptr.hpp:17, from ..//..//dev-environment//libs//cpp//boost//1.46.0/boost/shared_ptr.hpp:17, from ..//..//Core-cpp//inc/CrossSection/Domain/XenoSqlMappedDomainObject.h:20, from ..\\..\\Core-cpp\\src\\CrossSection\\Domain\\Xenosqlmappeddomainobject.cpp:8: ..//..//dev-environment//libs//cpp//boost//1.46.0/boost/config/platform/symbian.hpp:91:4: //*#error "Unsuppoted Symbian SDK"*/ has boost 1.46.0 some changement to make the shared_ptr doesn't support the symbian anymore? what is the last boost version which support symbian open c/c++ SDK? thanks a lot with best regards Ming

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problem compiling filesystem1.46.1 w/ g++ 4.4.3
by Adam Crain 06 Apr '11

06 Apr '11

I just tried to migrate our project from 1.43 -> 1.46.1 but am getting a compilation error with g++ 4.4.3: gcc.compile.c++ bin.v2/libs/filesystem/build/gcc-arm/release/link-static/threading-multi/v3/src/operations.o In file included from boost/filesystem/v3/operations.hpp:25, from libs/filesystem/v3/src/operations.cpp:52: boost/filesystem/v3/path.hpp: In function `std::basic_ostream<_CharT, _Traits>& boost::filesystem3::operator<<(std::basic_ostream<_CharT, _Traits>&, const boost::filesystem3::path&)': boost/filesystem/v3/path.hpp:583: error: parse error before `>' token The build works fine on with microsoft toolchain. Anyone seen this and have a patch? -- *Adam Crain* Chief Platform Architect, GEC Office: 919.836.9916 Cell: 919.428.1002 acrain(a)greenenergycorp.com <abender(a)greenenergycorp.com> *Green Energy Corp,* *enabling the smart grid of the future.** * *www.greenenergycorp.com* *www.totalgrid.org*

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[Asio] Socket Read/Write Thread-Safety
by Timothy Liang 06 Apr '11

06 Apr '11

Hi, I'm implementing a full-duplex protocol over TCP/IP using Boost.Asio. Multiple threads will be calling 'io_service::run_one()', so I have to serialize my completion handlers. Since I need to be reading and writing on a socket at the same time, can I use the 'boost::asio::async_read(...)' and 'boost::asio::async_write(...)' functions? The documentation states that these are implemented in terms of calls to the stream's async_read_some and async_write_some functions, and the 'basic_stream_socket' class isn't thread-safe. Thanks, Timothy

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[fusion] Adding to a map (1.42)
by Noah Roberts 05 Apr '11

05 Apr '11

https://svn.boost.org/trac/boost/ticket/4604 I've got 1.42 though. Updating at this point isn't a good option. Is there a way to work around this so that I can add a new pair to an existing fusion map?

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[lambda] Lambda bind and upgrading
by Swerts, Benjamin 05 Apr '11

05 Apr '11

Hello all, In the process of upgrading Boost from 1.39.0 to 1.46.1 I encountered a few problems with Boost.Lambda. Some places where I used bind and operator== are not compiling anymore with Visual Studio 2008 SP1. Here's a self-contained example showing the problem: --------------------- #include <algorithm> #include <vector> #include <boost/lambda/lambda.hpp> #include <boost/lambda/bind.hpp> using boost::lambda::bind; using boost::lambda::_1; struct A { unsigned int id; }; struct B { const A* a; }; int main() { const std::vector<B> vb; std::find_if(vb.begin(), vb.end(), bind(&A::id, bind(&B::a, _1)) == 2); return 0; } --------------------- - This code compiles fine with Boost 1.39.0 - When compiled with Boost 1.46.1 it shows the following error: boost_1_46_1/boost/lambda/detail/function_adaptors.hpp(280) : error C2440: 'return' : cannot convert from 'const unsigned int' to 'unsigned int &' - When removing the 'const' before the vector, this doesn't even compile in 1.39.0 - What's even stranger is that a simpler version doesn't compile under other circumstances. This compiles with 1.46.1: std::vector<A> va; std::find_if(va.begin(), va.end(), bind(&A::id, _1) == 2); but making the vector const doesn't (exact same error message). Both compile fine with 1.39.0. Both examples compile fine when I use Boost.Bind but that's not always a possible backup plan. I do plan on replacing all the bind calls with their Phoenix v3 equivalents but I first need to get Boost upgraded. Many thanks in advance for any insights. Greets, Ben

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Problems creating unit wrappers with StlSoft
by Ryan 05 Apr '11

05 Apr '11

My current project has several coordinate systems. These include Polar(azimuth, elevation, range) and LLA (latitude, longitude, altitude). I've really enjoyed using boost units to allow the user to input the required unit system but converting them behind the scenes to the unit system I need. I'm developing a function overload that lets the user call a single function but based on the coordinate system given the function behaves differently. Unfortunately, the units for Polar and LLA are the same. Both systems use two plane angles and a length. A second problem is two different groups use two different ways of talking about the Polar coordinate system. One group defines Polar as azimuth, elevation and range while the other group defines Polar as range, azimuth and elevation. I want to give both group the ability to call the function with the Polar definition they are used to talking about. I realize I could create a class for Polar and LLA and then pass that class to my overloaded function. This just pushes off the second problem to the newly created classes. Instead of creating classes for the coordinate systems I wanted to differentiate the different boost units from each other. This would let me overload my function without the need to create larger classes for each coordinate system. I ended up modifying the "true_typedef" class from StlSoft that wraps a type so it becomes incompatible with the same types. This allowed me, for example, to wrap a boost unit plane angle into a longitude and latitude that wouldn't be compatible with each other. What I don't like about this process is having to define a structure type and then using it in the typedef. Is there a boost library that would allow me to create this class in one pass without the two step process? Ryan #define STLSOFT_GEN_OPAQUE(type) typedef struct __stlsoft_htype##{ int i; } const* type; using namespace boost::units; template<typename T, typename U> class BoostUnitQuantityWrapper { typedef T unit_type; typedef U unique_type; typedef BoostUnitQuantityWrapper<T, U> class_type; quantity<unit_type> m_Value; public: template<class System> explicit BoostUnitQuantityWrapper ( quantity< unit< typename unit_type::dimension_type, System> > const& value) : m_Value(quantity<unit_type>(value)) {} BoostUnitQuantityWrapper(class_type const& rhs) : m_Value(rhs.m_Value) {} class_type const& operator= (class_type const& rhs) { m_Value = rhs.m_Value; return *this; } operator quantity<unit_type> () const { return m_Value; } }; STLSOFT_GEN_OPAQUE(latitude_type); STLSOFT_GEN_OPAQUE(longitude_type); STLSOFT_GEN_OPAQUE(range_type); STLSOFT_GEN_OPAQUE(altitude_type); typedef BoostUnitQuantityWrapper<si::plane_angle, latitude_type> Latitude; typedef BoostUnitQuantityWrapper<si::plane_angle, longitude_type> Longitude; typedef BoostUnitQuantityWrapper<si::length, range_type> Range; typedef BoostUnitQuantityWrapper<si::length, altitude_type> Altitude;

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Problem with boost::interprocess::ipc::message_queue
by Ming Lu 05 Apr '11

05 Apr '11

Hello Everybody, i used boost::interprocess::ipc::message_queue (boost 1.40) in my project. it works perfect. after upgrade from boost 1.40.0 to 1.46.0 i do have a problem with the message_queue. my usage of message_queue: Receiver: message_queue message_queue(open_or_create, strQueueName.c_str(), nMessagesNumber, nMessageLength); / .... bReceiveSucces = message_queue.try_receive(pchPuffer, m_nMessageLength, nRecievedSize, nPriority);/ Sender: message_queue message_queue(open_only, m_strMessageQueueName.c_str()); message_queue.try_send(strMessage.c_str(), nMessageLength, nPriority); (the Receiver is running before Sender has be started.) i readed the content in the output windows from Visual Studio 2008 (my building envoriment) during start of my application: * 1.40.0:* /'MessageQueueReceiver.exe': Loaded 'C:\data\20_NoBackup\Project\MessageQueueSender\Debug\MessageQueueReceiver.exe', Symbols loaded./ /'MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\system32\ntdll.dll'/ /'MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\system32\kernel32.dll'/ /'MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\system32\advapi32.dll'/ /'MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\system32\rpcrt4.dll'/ /'MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\system32\secur32.dll'/ /'MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\WinSxS\x86_Microsoft.VC90.DebugCRT_1fc8b3b9a1e18e3b_9.0.21022.8_x-ww_597c3456\msvcr90d.dll', Symbols loaded./ /'MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\WinSxS\x86_Microsoft.VC90.DebugCRT_1fc8b3b9a1e18e3b_9.0.21022.8_x-ww_597c3456\msvcp90d.dll', Symbols loaded./ /'MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\system32\shimeng.dll', Symbols loaded (source information stripped)./ /'MessageQueueReceiver.exe': Unloaded 'C:\WINDOWS\system32\shimeng.dll'/ the receiver-application loaded these dlls and waiting for the input message from the sender-application.. *1.46.0:* /MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\system32\wbem\wbemprox.dll', Symbols loaded (source information stripped)./ /'MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\system32\wbem\wbemcomn.dll', Symbols loaded (source information stripped)./ /'MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\system32\ws2_32.dll', Symbols loaded (source information stripped)./ /'MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\system32\ws2help.dll', Symbols loaded (source information stripped)./ /'MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\system32\wbem\wbemsvc.dll', Symbols loaded (source information stripped)./ /'MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\system32\wbem\fastprox.dll'/ /'MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\system32\msvcp60.dll', Symbols loaded (source information stripped)./ /'MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\system32\ntdsapi.dll', Symbols loaded (source information stripped)./ /'MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\system32\dnsapi.dll'/ /'MessageQueueReceiver.exe': Loaded 'C:\WINDOWS\system32\wldap32.dll', Symbols loaded (source information stripped)./ /'MessageQueueReceiver.exe': Unloaded 'C:\WINDOWS\system32\wbem\fastprox.dll'/ /'MessageQueueReceiver.exe': Unloaded 'C:\WINDOWS\system32\ntdsapi.dll'/ /'MessageQueueReceiver.exe': Unloaded 'C:\WINDOWS\system32\wldap32.dll'/ /'MessageQueueReceiver.exe': Unloaded 'C:\WINDOWS\system32\dnsapi.dll'/ /'MessageQueueReceiver.exe': Unloaded 'C:\WINDOWS\system32\msvcp60.dll'/ /'MessageQueueReceiver.exe': Unloaded 'C:\WINDOWS\system32\wbem\wbemsvc.dll'/ /'MessageQueueReceiver.exe': Unloaded 'C:\WINDOWS\system32\wbem\wbemprox.dll'/ /'MessageQueueReceiver.exe': Unloaded 'C:\WINDOWS\system32\ws2_32.dll'/ /'MessageQueueReceiver.exe': Unloaded 'C:\WINDOWS\system32\ws2help.dll'/ /'MessageQueueReceiver.exe': Unloaded 'C:\WINDOWS\system32\wbem\wbemcomn.dll'/ ...................... ...................... ...................... the receiver-application loaded these complettly different Dlls (in compare with 1.40) and unloaded them repeatly (endless). if man compare the cruise of the message_queue, is 1.46.0 about 4 times slower as 1.40.0. do somebody know? is it a bug or just the sideeffect from the changement? how can i use the message_queue correctly? thanks a lot for any suggestion best regards Ming Lu

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