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[Interprocess] Trying to include unistd.h on Windows?
by Derek Kivi 02 Mar '09

02 Mar '09

We are using the Interprocess library to make use of shared memory within our code. We are experiencing the following problem when building on Windows. Some of our projects are trying to include unistd.h from workaround.hpp. It looks like this happens if BOOST_WINDOWS is not defined. Tracing back through the header files I pieced together that BOOST_WINDOWS is not defined if BOOST_DISABLE_WIN32 is defined (win32.hpp). And BOOST_DISABLE_WIN32 gets defined if _MSC_EXTENSIONS is not defined (visualc.hpp). >From the MSDN documentation, _MSC_EXTENSIONS is not defined if the Visual C++ Language Extensions are turned off, which in fact they are for these projects. Has anyone else seen this and is there a workaround for getting Boost Interprocess to work on Windows in cases where the Visual C++ Language Extensions are turned off? Thanks, Derek -- Derek Kivi Senior Software Developer QuIC Financial Technologies Inc. Office: +1 403 210 8282 Mobile: +1 403 863 5204 derek.kivi(a)quic.com Risk. Managed. www.quic.com Confidentiality Notice: The information transmitted is intended only for the person(s) or entity(ies) to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination, or other use of, or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you received this email in error, please contact the sender and delete the email and any related material from any computer. ver. QuIC 0707

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Error while compiling boost thread
by ayansinhas＠gmail.com 02 Mar '09

02 Mar '09

Hi All, I am using boost thread for my project. I have used BCP tool to extract only those binaries that is related to boost thread(and the dependencies also).... Now I am trying to compile my code using only that thread binaries.. previously i tried using that binaries by writing a small code.... and it worked properly. I have done the necessary setings changes in VS2008. A snippet of the errors are as follows c:\program files\bthread\boost\shared_ptr.hpp(142) : error C2332: 'class' : missing tag name 1>c:\program files\bthread\boost\shared_ptr.hpp(142) : error C2011: '<unnamed-tag>' : 'enum' type redefinition 1> c:\program files\microsoft sdks\windows\v6.0a\include\shlwapi.h(1550) : see declaration of '<unnamed-tag>' 1>c:\program files\bthread\boost\shared_ptr.hpp(142) : error C2143: syntax error : missing ',' before 'return' 1>c:\program files\bthread\boost\shared_ptr.hpp(146) : error C2332: 'class' : missing tag name 1>c:\program files\bthread\boost\shared_ptr.hpp(146) : error C2011: '<unnamed-tag>' : 'enum' type redefinition 1> c:\program files\microsoft sdks\windows\v6.0a\include\shlwapi.h(1550) : see declaration of '<unnamed-tag>' 1>c:\program files\bthread\boost\shared_ptr.hpp(146) : error C2143: syntax error : missing ',' before 'return' 1>c:\program files\bthread\boost\shared_ptr.hpp(146) : error C2059: syntax error : 'return' 1>c:\program files\bthread\boost\shared_ptr.hpp(147) : error C2143: syntax error : missing ';' before '{' 1>c:\program files\bthread\boost\shared_ptr.hpp(149) : error C2143: syntax error : missing ';' before '}' 1>c:\program files\bthread\boost\shared_ptr.hpp(153) : error C2143: syntax error : missing ';' before '}' 1>c:\program files\bthread\boost\shared_ptr.hpp(164) : error C2649: 'typename' : is not a 'class' 1>c:\program files\bthread\boost\shared_ptr.hpp(529) : error C2649: 'typename' : is not a 'class' I have done a little bit of googling... but i am not getting the right info.... As we can see it is giving syntax error related to .hpp files .... which I haven't change at all.... I will really appreciate if any body can throw some light on it.... Thanks in Advance Ayan.

2 1

serial programs
by Steven Woody 02 Mar '09

02 Mar '09

Hi, I want to write a portable program which need to read/write serial ports. How can boost help this? Thank you. ( I got know basic serial programming in Linux but I have no idea how that it done in Windows ) -- woody then sun rose thinly from the sea and the old man could see the other boats, low on the water and well in toward the shore, spread out across the current.

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Pool ordered_malloc and O(n)
by Georg Sauthoff 02 Mar '09

02 Mar '09

Hi, the boost pool documentation states ordererd_malloc(n) and boost::free(chunk, n) both take O(n). I tested it with a workload of a lot of n=1 and n=2 small allocations. Basically if I just use boost::malloc(2*base_size) even if i just need boost::malloc(base_size) the runtime is 1 min. With ordered_malloc(_)/boost::free(_,_) the runtime explodes (>> 30 minutes) (I terminated the program). Profiling it, one can see, that ordered_malloc dominates the runtime (83 % after a few minutes). Is this a known issue? Is the runtime of ordered_malloc in O(n), i.e. in O(c\cdot n), but the constant factor c is very huge? Best regards Georg Sauthoff

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serial port and boost::iostream
by Christoph Gysin 02 Mar '09

02 Mar '09

I wrote a simple serial device for the boost::iostream library using the serial interface from boost:asio. Feel free to include it as an example if you find it useful. Chris #include <boost/iostreams/stream.hpp> #include <boost/asio/serial_port.hpp> class serial_device { public: typedef char char_type; typedef boost::iostreams::bidirectional_device_tag category; serial_device(boost::asio::serial_port& port) : serial_port(port) {}; std::streamsize read(char* buf, std::streamsize n) { return serial_port.read_some(boost::asio::buffer(buf, n)); } std::streamsize write(const char* buf, std::streamsize n) { return serial_port.write_some(boost::asio::buffer(buf, n)); } private: boost::asio::serial_port& serial_port; }; void example() { // set up serial port boost::asio::io_service io_service; #ifdef WIN32 boost::asio::serial_port serial_port(io_service, "COM1"); #else boost::asio::serial_port serial_port(io_service, "/dev/ttyS0"); #endif typedef boost::asio::serial_port_base spb; serial_port.set_option(spb::baud_rate(9600)); // create iostream serial_device dev(serial_port); boost::iostreams::stream<serial_device> serial(dev); // use serial port with iostream interface serial << "boost::iostreams are fun!" << std::endl; std::string response; serial >> response; } -- echo mailto: NOSPAM !#$.'<*>'|sed 's. ..'|tr "<*> !#:2" org@fr33z3

1 0

[Serialization] Compile error in load_wrapper
by Ryan Fowler 02 Mar '09

02 Mar '09

Hi, I am having trouble serializing a class. Actually, I am having trouble compiling the class as below. The actual archiving is behind an interface (hence the Save and Load methods) which may work (once I get this sorted, I'm going to look at the export traits), but the error points to me not declaring the is_wrapper properly. My class: BOOST_CLASS_IS_WRAPPER(Frame); class Frame { ... // Serialize interface uint32 Save( uint8* pStream ) { ostrstream os( (char*)pStream, STREAM_SIZE ); boost::archive::text_oarchive oa(os); oa << this; return os.pcount(); } void Load( uint8* pStream ) { istrstream is( (char*)pStream, STREAM_SIZE ); boost::archive::text_iarchive ia(is); ia >> this; } friend class boost::serialization::access; template< class Archive > void serialize( Archive& ar, const unsigned int version ) { string strObjectType = "IFrame"; ar << strObjectType.length() << strObjectType; ar << m_lMaxFrameLength << m_lDataLength << m_uiTimeStamp; ar << boost::serialization::make_binary_object( (void*)(this + 1), m_lMaxFrameLength ); } My error: W:\NewFramework\Boost\boost/archive/detail/iserializer.hpp(541) : error C2664: 'boost::archive::load_wrapper' : cannot convert parameter 3 from 'boost::serialization::is_wrapper<T>' to 'boost::mpl::true_' 1> with 1> [ 1> T= Frame * 1> ] 1> No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called 1> W:\NewFramework\Boost\boost/archive/detail/common_iarchive.hpp(59) : see reference to function template instantiation 'void boost::archive::load<Archive,const T>(Archive &,const T &)' being compiled 1> with 1> [ 1> Archive=boost::archive::text_iarchive, 1> T= Frame *const 1> ] 1> W:\NewFramework\Boost\boost/archive/basic_text_iarchive.hpp(62) : see reference to function template instantiation 'void boost::archive::detail::common_iarchive<Archive>::load_override<T>(T &,int)' being compiled 1> with 1> [ 1> Archive=boost::archive::text_iarchive, 1> T= Frame *const 1> ] 1> W:\NewFramework\Boost\boost/archive/text_iarchive.hpp(65) : see reference to function template instantiation 'void boost::archive::basic_text_iarchive<Archive>::load_override<T>(T &,int)' being compiled 1> with 1> [ 1> Archive=boost::archive::text_iarchive, 1> T= Frame *const 1> ] 1> W:\NewFramework\Boost\boost/archive/detail/interface_iarchive.hpp(61) : see reference to function template instantiation 'void boost::archive::text_iarchive_impl<Archive>::load_override<T>(T &,int)' being compiled 1> with 1> [ 1> Archive=boost::archive::text_iarchive, 1> T= Frame *const 1> ] 1> w:\newframework\framework\sourcecode\includes\RDCFrameFactoryImpl\RDCFra me.h(262) : see reference to function template instantiation 'Archive &boost::archive::detail::interface_iarchive<Archive>::operator >>< Frame*const >(T &)' being compiled 1> with 1> [ 1> Archive=boost::archive::text_iarchive, 1> T= Frame *const 1> ] Thanks, Ryan Ryan Fowler Software Engineer Thomson Reuters Phone: +442075427063 ryan.fowler(a)thomsonreuters.com thomsonreuters.com This email was sent to you by Thomson Reuters, the global news and information company. Any views expressed in this message are those of the individual sender, except where the sender specifically states them to be the views of Thomson Reuters.

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How to use boost::regex source code without using any *.lib file
by Jun Wan 02 Mar '09

02 Mar '09

---------- Forwarded message ---------- From: Jun Wan <junjun.wanjun(a)gmail.com> Date: 2009/2/17 Subject: How to use boost::regex source code without using any *.lib file To: boost-users(a)lists.boost.org Hello, Recently I used boost::regex in my project(VS2005 IDE). It works well with linking the lib file. But I want to use the source code of boost::regex.I include the regex.hpp in the project and used BOOST_REGEX_NO_LIB macro; But I got such error infomation when linking the code. error LNK2001: unresolved external symbol "private: class boost::basic_regex<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > > & __thiscall boost::basic_regex<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > >::do_assign(char const *,char const *,unsigned int)" (?do_assign@?$basic_regex@DU?$regex_traits@DV ?$w32_regex_traits@D@boost@@@boost@@@boost@@AAEAAV12@PBD0I@Z) error LNK2001: unresolved external symbol "private: void __thiscall boost::re_detail::perl_matcher<char const *,class std::allocator<struct boost::sub_match<char const *> >,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > >::construct_init(class boost::basic_regex<char,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > > const &,enum boost::regex_constants::_match_flags)" (?construct_init@?$perl_matcher@PBDV ?$allocator@U?$sub_match@PBD@boost@@@std@@U?$regex_traits@DV ?$w32_regex_traits@D@boost@@@boost@@@re_detail@boost @@AAEXABV?$basic_regex@DU?$regex_traits@DV?$w32_regex_traits@D@boost@ @@boost@@@3@W4_match_flags@regex_constants@3@@Z) error LNK2001: unresolved external symbol "public: bool __thiscall boost::re_detail::perl_matcher<char const *,class std::allocator<struct boost::sub_match<char const *> >,struct boost::regex_traits<char,class boost::w32_regex_traits<char> > >::find(void)" (?find@?$perl_matcher@PBDV ?$allocator@U?$sub_match@PBD@boost@@@std@@U?$regex_traits@DV ?$w32_regex_traits@D@boost@@@boost@@@re_detail@boost@@QAE_NXZ) I want to know why I can't use the source code of boost::regex. Is there any thing I need to do? Any help will be appreciated! Thank you! Jun

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Fastest way of serializing a huge vector of ints into a human readable string
by Roland Bock 02 Mar '09

02 Mar '09

Hi, I have a program which produces a vector of integers (several million entries). I need to write that into a human-readable string of space separated numbers. I wonder, what would be the fastest way? My first attempt was stringstream resultStream; copy(integers.begin(), integers.end(), ostream_iterator<int>(resultStream, " ")); string result = resultStream.str(); But that requires copying the string. Thus I was wondering if I could use boost to write to the target string directly? boost::iostreams allow me to do the following: string result; boost::iostreams::filtering_ostream out(boost::iostreams::back_inserter(result)); copy(integers.begin(), integers.end(), ostream_iterator<uint64>(out, " ")); This is faster by almost a factor of 2. Any ideas how to increase speed even more? Thanks in advance, Roland

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[pool] Request at least 65535 bytes from UserAllocator.
by Alexander 01 Mar '09

01 Mar '09

Hi I'm going to use Boost.Pool with UserAllocator mapped directly to Windows API calls ::VirtualAlloc and ::VirtualFree. So it makes no sense to allocate less than SYSTEM_INFO::dwAllocationGranularity, which currently equals to 65536. To my surprise, I have not found anything like this in documentation. But I've seen in source code this: // pre: npartition_size != 0 && nnext_size != 0 explicit pool(const size_type nrequested_size, const size_type nnext_size = 32) So is "nnext_size" what I was looking for ? And what does mean "an extension", is there an official proposal of Pool for future standard ?

1 0

Building boost 1.38 on mac os X
by Alain Leblanc 01 Mar '09

01 Mar '09

Hi, I'm having problems (again) building boost on mac OS X 64-bit. Once again specifying architecture=x86 address-model=64 to bjam gives me a message that my cpu does not support the x86-64 instruction set. I was getting the same message with boost 1.34, and it was fine for boost 1.36. I tried getting around the problem by adding cxxflags=-m64 to the bjam execution, but then I get the message at the bottom. Invoking bjam with no option will build everything fine, but it looks like it is a 32-bit build. Did anyone have a same issue and manage to solve it? thanks, a "g++" -o "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/libboost_math_c99l-gcc40-mt-1_38.dylib" -Wl,-h -Wl,libboost_math_c99l-gcc40-mt-1_38.dylib -shared -Wl,--start-group "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/acoshl.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/asinhl.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/atanhl.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/cbrtl.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/copysignl.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/erfcl.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/erfl.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/expm1l.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/fmaxl.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/fminl.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/fpclassifyl.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/hypotl.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/lgammal.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/llroundl.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/log1pl.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/lroundl.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/nextafterl.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/nexttowardl.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/roundl.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/tgammal.o" "bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/truncl.o" -Wl,-Bstatic -Wl,-Bdynamic -Wl,--end-group -Wl,--strip-all ...failed gcc.link.dll bin.v2/libs/math/build/gcc-4.0.1/release/threading-multi/libboost_math_c99l-gcc40-mt-1_38.dylib... gcc.link.dll bin.v2/libs/program_options/build/gcc-4.0.1/release/threading-multi/libboost_program_options-gcc40-mt-1_38.dylib ld: unknown option: -h collect2: ld returned 1 exit status

3 3

[boost-users]building with _SECURE_SCL=0
by Igor R 01 Mar '09

01 Mar '09

Hello, When I build 1.38.0 with bjam in release configuration, is it built with * _SECURE_SCL*=*0*? If not, how exactly can I enforce it? ** Thanks.

2 1

[Graph] Using a bit-based ajacency matrix.
by Thorsten Ottosen 01 Mar '09

01 Mar '09

Dear All, Does anybody have experience with the above. That is, to represent the graph as a bit-based ajacency matrix, and then use that together with Boost.Graph? I'm thinking that Boost.Graph will not exploit this representation optimally. Am I correct? Thanks in advance -Thorsten

3 8

newbie thread synchronization question
by Cory Riddell 01 Mar '09

01 Mar '09

I'm a total newbie with the Thread library, so please forgive me if this is a dumb question. Say I make a class called Shared that looks something like this: class Shared { private: boost::mutex monitor; int qty; public: Shared() : qty(0) { } void lock() { monitor.lock(); } void unlock() { monitor.unlock(); } int getQty() { return qty; } void setQty(int q) { qty = q; } }; If I use it in from multiple threads with code that looks like: // s is an instance of Shared s.lock(); int q = s.getQty(); ++q; s.setQty(q); s.unlock(); will it work reliably on a multi-core machine? When the mutex unlock() happens, does that flush the CPU cache and write the value of s.qty to main memory? Does the mutex lock() operation clear the CPU cache and force a reload of s from the main memory? I'm trying to understand how synchronization works among multiple cpus. I've only worked on multithreaded code in Java and there the memory model is well defined. AFAIK, that isn't the case in C++. Cory

3 2

asio tcp socket receive timeout value
by Lennyk 01 Mar '09

01 Mar '09

Hi, I'm using boost 1.35 on Linux. I would like to change the timeout value of the tcp socket receive call. I know that the default value is 30 seconds. Thanks, Lenny.

2 1

unresolved external issue and who do I pass a boost patch to?
by Sean Farrow 01 Mar '09

01 Mar '09

Hi: can Anybody help I'm using the boost::filesystem library, and am including <boost/filesystem/path.hpp> and am getting: 1>O2ServerImpl.obj : error LNK2019: unresolved external symbol "class boost::system::error_category const & __stdcall boost::system::get_system_category(void)" (?get_system_category@system@boost@@YGABVerror_category@12@XZ) referenced in function "void __cdecl boost::system::`dynamic initializer for 'system_category''(void)" (??__Esystem_category@system@boost@@YAXXZ) 1>O2ServerImpl.obj : error LNK2019: unresolved external symbol "class boost::system::error_category const & __stdcall boost::system::get_generic_category(void)" (?get_generic_category@system@boost@@YGABVerror_category@12@XZ) referenced in function "void __cdecl boost::system::`dynamic initializer for 'generic_category''(void)" (??__Egeneric_category@system@boost@@YAXXZ) I am linking with: libboost_filesystem-vc80-mt-gd-1_39.lib libboost_system-vc80-mt-sgd-1_39.lib Anyone with any ideas? Also I've modified a boost header file, who do I pass this too for update to the svn trunk? Cheers Sean.

3 3

Lambda issue.
by Surya Kiran Gullapalli 01 Mar '09

01 Mar '09

Hello all,I've a class with boost::variant as its member ; class A { public: A() { } boost::variant<int, string, double, date>& getValue (const string& key) { ... } private: map<string, boost::variant<int, string, double, date> >m_member ; } I've list of A's like this list<A> myList. when trying to find a particular element with integer value (1 say) which is stored in m_member, I'm doing this.. find_if (myList.begin(), myList.end(), (boost::lambda::bind(&A::getValue, boost::lambda::_1, "SomeKey") == 1)); This is giving lot of errors. I've tried casting the result of bind to Variant, and then converting the variant to int using boost::get<int>().. but no help. Any ideas how to do this ? Surya

2 1

Some question about cross-compiling boost
by 邹磊 01 Mar '09

01 Mar '09

Hi, Volodya. Thanks for your reply. I have tried the method in the document ( http://www.boost.org/boost-build2/doc/html/bbv2/tasks/crosscompile.html ), there were still some problems. Some libraries has been built successfully, but many not (such as libboost_serialization, libboost_wave and so on). I got the information as following: >>...failed gcc.compile.c++ bin.v2/libs/math/build/gcc-3.8.0/release/link-static/threading-multi/sph_neumannf.o... >>.......... >>...skipped <p/usr/local/lib/>libboost_serialization-gcc38-mt.a for lack of<p/usr/local/lib>libboost_serialization-gcc38-mt-1_38.a... I didn't know why these libraries built failed. I wonder whether the problem is due to my gcc kernel of cross-compiler . Maybe it's version is too low to build that libraries? How to solve the problem? Thank you! Zou ___________________________________________________________ 好玩贺卡等你发，邮箱贺卡全新上线！ http://card.mail.cn.yahoo.com/

2 3

Having a tough time installing and setting up Boost and associated libraries
by ajay gopalakrishnan 01 Mar '09

01 Mar '09

Hi all, I am a newbie when it comes to using boost. My primary motivation behind using boost is that I want to use the Text processing, Numerical computing facilities together in one common language. Boost Regex, Spriti and The BLas Libraries would serve my purpose. However, I am having a tough time installing and running it. I am not able to find any good documentation for using this. My requirement is this: 1. I want to be able to install Boost locally in my Unix account. I don't have root privileges. 2. There is a wrapper called Boost Numerics Package written and hosted at http://mathema.tician.de/software/boost-bindings. I want to be able to use this also. This allows me to use ATLAS, BLAS in Boost. I would also like to know, how tough is it to interface C++ code with Python using Boost.Python. I am not an expert in Python. What is the procedure to do this? Your help will be highly appreciated. Thanks, Ajay G.

3 2

shared_ptr memory leak
by gast128 01 Mar '09

01 Mar '09

Dear all, we managed to create a shared_ptr memory leak, without making a cycle. Granted it is highly controversial case. One has to make call in the destructor of the owned object which loops back to the point of assignment. Is this something for the documentation, or may this indeed be flagged as a 'nut' case. Code below is a simplified example, the production case was with some kind of change manager which notification bounced back to the point of assignment. One has to split out header and cpp to get it compilable. void TestSharedPtrLeak() { //make the leak KTestBoostHlpSpLeakParent leak; leak.Reset(false); } //ktestboosthlpspleakparent.h struct KTestBoostHlpSpLeakParent { KTestBoostHlpSpLeakParent(); void Reset(bool b); boost::shared_ptr<KTestBoostHlpSpLeak> m_ptr; }; //ktestboosthlpspleakparent.cpp KTestBoostHlpSpLeakParent::KTestBoostHlpSpLeakParent() { Reset(true); } void KTestBoostHlpSpLeakParent::Reset(bool b) { boost::shared_ptr<KTestBoostHlpSpLeak> ptr(new KTestBoostHlpSpLeak(this, b)); m_ptr = ptr; //m_ptr.swap(ptr); //would solve it btw } //ktestboosthlpspleak.h struct KTestBoostHlpSpLeak { KTestBoostHlpSpLeak(KTestBoostHlpSpLeakParent* p, bool b); ~KTestBoostHlpSpLeak(); public: KTestBoostHlpSpLeakParent* m_p; bool m_b; }; //ktestboosthlpspleak.cpp KTestBoostHlpSpLeak::KTestBoostHlpSpLeak(KTestBoostHlpSpLeakParent* p, bool b) : m_p(p) , m_b(b) { } KTestBoostHlpSpLeak::~KTestBoostHlpSpLeak() { if (m_b) { //recursive call m_p->Reset(false); } }

2 2

error when using boost with visual c++
by Sean Farrow 01 Mar '09

01 Mar '09

Hi; When using boost with visual c++ 2005, I'm getting the following two error: c:\program files\microsoft visual studio 8\vc\include\intrin.h(198) : error C2373: '_InterlockedExchange' : redefinition; different type modifiers c:\program files\boost\boost\detail\interlocked.hpp(60) : see declaration of '_InterlockedExchange' Has anyone got any ideas what is causing this? I'm including the following files in the file that is indicating the error: #include <vector> #include <boost/algorithm/string.hpp> #include <boost/array.hpp> #include <boost/filesystem/path.hpp> #include <boost/foreach.hpp> #include <windows.h> #include <psapi.h> #include <ole2.h> #include <exdisp.h> #include <mshtml.h> #include "O2ServerImpl.h" #include "Globals.h" //Crypto++ remove as necessary. #include <default.h> #include <filters.h> #include <hex.h> #include <md5.h> #include <ripemd.h> #include <rng.h> #include <gzip.h> #include <randpool.h> #include <ida.h> #include <base64.h> #include <factory.h> #include <whrlpool.h> #include <tiger.h> any help appreciated. Sean.

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[Proto] Compialtion-time of user-defined functions : terminals vs make_expr
by Joel Falcou 28 Feb '09

28 Feb '09

As stated in a previous thread, the question was open on what to choose to build large number of functions inside Proto and Eric mentionned being interested by the results .. so ;) The choices were : - using a terminal containing the Polymorphic Function Object of the function and statcially instanciate it bp::terminal< my_func_pfo > my_func = {{}}; - using make_expr in a template function Here is the breakdown of measures I run this day using g++-4.3 and latest proto. I used Boost::Preprocessor to generate all the code and measured the compiel time on a streak of 100 compialtion for eahc version. Naked main : 0.05s Naked main w/ proto : 1.50s => overhead of proto include = 1.45s Without Call to the actual function: Main with 1 proto term : 1.52s => overhead = 0.02s = 0.020s/term Main with 10 proto term : 1.55s => overhead = 0.05s = 0.005s/term Main with 100 proto term : 1.99s => overhead = 0.49s = 0.005s/term Main with 150 proto term : 2.55s => overhead = 1.05s = 0.007s/term Main with 200 proto term : 3.48s => overhead = 1.98s = 0.009S/term Main with 256 proto term : 4.80s => overhead = 3.30s = 0.013s/term Main with 1 proto func : 1.52s => overhead = 0.02s for one function = 0.0200s/func Main with 10 proto func : 1.53s => overhead = 0.03s for one function = 0.0030s/func Main with 100 proto func : 1.53s => overhead = 0.03s for one function = 0.00030s/func Main with 150 proto func : 1.55s => overhead = 0.05s for one function = 0.00033s/func Main with 200 proto func : 1.57s => overhead = 1.98s for one function = 0.00035s/func Main with 256 proto func : 1.61s => overhead = 3.30s for one function = 0.00043s/func With Call to the defined functions in sequence : func behaves like term without call (aka compilation time between 1.5s and 4.8s) term behaves like term without call with a linear overhead of 0.017s/call (aka compilation time between 4.5s and 9.1s) Other measures : executable size skyrocket with term even without any functions being called. 256 functions instanciated yields a 7.3kb binary vs a 1.4kb binary for make_expr func so an overhead of 23,6 bytes/functions in the case of terminal object The scaling seems fine and make_expr is, as expected, the best contender for large number of user-defined expression generator. -- ___________________________________________ Joel Falcou - Assistant Professor PARALL Team - LRI - Universite Paris Sud XI Tel : (+33)1 69 15 66 35

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asio Socket disconnection not working in 1.38?
by Michael Dehmlow 28 Feb '09

28 Feb '09

I'm trying to detect that a peer has been disconnected using the asio socket library. Below is a source listing of a unit test that I have created (which is one of several that I have tried; ask for more listings if nesasary) to figure out a reliable method to do so. I've also tried using (and have unit test listings for) the availble(errorCode) call the sock1.remote_endpoint(errorCode); calls. I need a way to detect that a client has been disconnected from my server without blocking. I've even tried using the read_some call with the io_control non_blocking option set but the then read some returns an error every time read_some is called. [code] for(int i=0;i<1;i++) { boost::asio::io_service ioServ1; boost::asio::io_service ioServ2; boost::asio::io_service ioServ3; boost::asio::io_service ioServ4; boost::asio::ip::tcp::socket sock1(ioServ1); boost::asio::ip::tcp::socket sock3(ioServ3); SocketAcceptor sA1(ioServ1,sock1,std::string("localHost"),8321); SocketAcceptor sA2(ioServ3,sock3,std::string("localHost"),8322); // The socket acceptor class simple starts a thread and and accept(_mySocket,ec) // with a boost::asio::ip::tcp::acceptor. If thread does not completed in the time passed in //the milliseconds then the call then the the accept call will return. sA1.accept(10); sA2.accept(10); boost::asio::ip::tcp::socket sock2(ioServ2); boost::asio::ip::tcp::socket sock4(ioServ4); boost::asio::ip::tcp::resolver resolver1(ioServ2); boost::asio::ip::tcp::resolver::query query1(boost::asio::ip::tcp::v4(), "localhost", (boost::lexical_cast<std::string>(8321)).c_str()); boost::asio::ip::tcp::resolver::iterator iterator1 = resolver1.resolve(query1); boost::asio::ip::tcp::resolver resolver2(ioServ4); boost::asio::ip::tcp::resolver::query query2(boost::asio::ip::tcp::v4(), "localhost", (boost::lexical_cast<std::string>(8322)).c_str()); boost::asio::ip::tcp::resolver::iterator iterator2 = resolver2.resolve(query2); sock2.connect(*iterator1); sock4.connect(*iterator2); TS_ASSERT_EQUALS(sA1.accept(200),true); TS_ASSERT_EQUALS(sA2.accept(200),true); boost::system::error_code errorCode; //std::cout<<"about to read some from socket"<<std::endl; //boost::asio::socket_base::non_blocking_io command(true); //sock1.io_control(command); //TS_ASSERT_EQUALS(sock1.read_some(boost::asio::buffer(data, length), errorCode),0); //std::cout<<"Hopefully that didn't take long"<<std::endl; sock2.close(); sock4.close(); //just a boost wrapped sleep call Thread::sleep(2000); //this assertion will always fail just used to see what is in the errorCode object. TS_ASSERT_EQUALS(boost::asio::error::eof,errorCode); sock1.available(errorCode); TS_ASSERT(errorCode); TS_ASSERT_EQUALS(boost::asio::error::eof,errorCode); sock2.available(errorCode); TS_ASSERT(errorCode); TS_ASSERT_EQUALS(boost::asio::error::eof,errorCode); //TS_ASSERT_EQUALS(sock3.read_some(boost::asio::buffer(data, length), errorCode),0); //TS_ASSERT_EQUALS(boost::asio::error::eof,errorCode); // TS_ASSERT(errorCode); sock3.available(errorCode); TS_ASSERT(errorCode); TS_ASSERT_EQUALS(boost::asio::error::eof,errorCode); sock3.available(errorCode); TS_ASSERT(errorCode); TS_ASSERT_EQUALS(boost::asio::error::eof,errorCode); //TS_ASSERT_EQUALS(sock2.read_some(boost::asio::buffer(data, length), errorCode),0); //TS_ASSERT_EQUALS(boost::asio::error::eof,errorCode); //TS_ASSERT(errorCode); sock4.available(errorCode); TS_ASSERT(errorCode); TS_ASSERT_EQUALS(boost::asio::error::eof,errorCode); //TS_ASSERT_EQUALS(sock4.read_some(boost::asio::buffer(data, length), errorCode),0); //TS_ASSERT_EQUALS(boost::asio::error::eof,errorCode); //TS_ASSERT(errorCode); TS_ASSERT(!sock1.is_open()); TS_ASSERT(!sock3.is_open()); } [/code] The output: //expected failure Error: Expected (boost::asio::error::eof == errorCode), found ({ 02 00 00 00 } != { 00 00 00 00 38 A4 63 00 }) //sock1 no errorCode Error: Assertion failed: errorCode //sock1 no errorCode Error: Expected (boost::asio::error::eof == errorCode), found ({ 02 00 00 00 } != { 00 00 00 00 38 A4 63 00 }) //-------------------------------- //sock2 ALWAYS returns an errorcode //-------------------------------- //sock2 some other errorCode Error: Expected (boost::asio::error::eof == errorCode), found ({ 02 00 00 00 } != { 19 27 00 00 38 A4 63 00 }) //sock3 no errorCode Error: Assertion failed: errorCode Error: Expected (boost::asio::error::eof == errorCode), found ({ 02 00 00 00 } != { 00 00 00 00 38 A4 63 00 }) //sock4 no errorCode Error: Assertion failed: errorCode Error: Expected (boost::asio::error::eof == errorCode), found ({ 02 00 00 00 } != { 00 00 00 00 38 A4 63 00 }) //-------------------------------- //sock4 ALWAYS returns an errorcode //-------------------------------- //sock4 some other errorCode Error: Expected (boost::asio::error::eof == errorCode), found ({ 02 00 00 00 } != { 19 27 00 00 38 A4 63 00 }) //is_open doesn't seem all that helpful either Error: Assertion failed: !sock1.is_open() Error: Assertion failed: !sock3.is_open() -- View this message in context: http://www.nabble.com/asio-Socket-disconnection-not-working-in-1.38--tp2223… Sent from the Boost - Users mailing list archive at Nabble.com.

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[multi_array] Why the precondition on assignment?
by Peter Barker 28 Feb '09

28 Feb '09

Hello, I wonder if anyone can give me the rationale behind boost::multi_index's assignment operator having the following precondition: std::equal(this->shape(),this->shape()+this->num_dimensions(),x.shape()); as mentioned in this document: http://www.boost.org/doc/libs/1_38_0/libs/multi_array/doc/reference.html ? I've got a multi_array as a data member of a class and would like to avoid having to create an assignment operator for my class do the resizing and assignment. Regards, Peter Barker

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[random] Problems generating pseudorandom 64-bit ints across multiple computers
by James Madison 27 Feb '09

27 Feb '09

I am currently developing a distributed application where many clients need to generate unique 64-bit random numbers which will be used as keys. I am having problems getting boost to do this. For my first attempt, I tried something like the following: boost::mt19937 RandomNumberGenerator::s_algorithm; boost::uniform_int<unsigned long long> RandomNumberGenerator::s_range( std::numeric_limits<unsigned long long>::min(), std::numeric_limits<unsigned long long>::max()); boost::variate_generator<boost::mt19937&, boost::uniform_int<unsigned long long> > RandomNumberGenerator::s_rng(RandomNumberGenerator::s_algorithm, RandomNumberGenerator::s_range); I had two issues though: 1. Is this really giving me random 64 bit numbers, or is it just generating 32-bit numbers and then doing bit expansion? 2. The values always started with the same number. Trying to find a fix for #2, I though of using a hashed GUID as a seed. The problem is I noticed the seed value takes a 32 bit int, which essentially means a 1/2^32 chance of the first value colliding even if chosen completely randomly, which is unacceptable for my application. I am back where I started. Is there any clean way to use boost to generate random 64-bit intergers, when the same application is going to be run across multiple computers?

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[Proto] Reducing domain check in operator
by Joel Falcou 27 Feb '09

27 Feb '09

Actually, Proto defiens operators that STATIC_ASSERT when the left and right operand domain types are no the same using is_same. How could I have those check be looser than is_same ? Should I just overload boost::is_same for my domain type and perform a proper test here or is there a way to incorporate this into Proto ? Thanks in advance

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