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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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Upgrade from Boost v1.37.0 to v1.38.0
by biolaser 27 Feb '09

27 Feb '09

I have Boost v1.37.0 installed on Windows XP with Visual Studio v7.1 - is there an upgrade path to v1.38.0, or must I remove v1.37.0 and install v1.38.0 from scratch? William

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Re: [Boost-users] make member functions (in)accessible
by Stefan Funck 27 Feb '09

27 Feb '09

This looks brilliant! Thanks a lot!! Stefan > > > > private: > > template<class Pwd, class ExpectedPwd> > > void set_impl( Type const& value > > , typename boost::enable_if<boost::is_same<Pwd, > > ExpectedPwd> >::type* enable =0 > > ) > > { > > value_ = value; > > } > > > > > Actually ExpectedPwd is not required as template parameter, but it helps to > understand the flow. It is possible to rewrite the Property as: > > > > template<class Type, class PasswordT=void> > class Property > { > > public: > Type const& get()const > { > return value_; > } > > > > template<class PwdT> > void set( Type const& value) > { > set_impl<PwdT>(value); > } > > void set(Type const& value) > { > set_impl<void>(value); > } > > > private: > template<class Pwd> > void set_impl( Type const& value > , typename boost::enable_if<boost::is_same<Pwd, PasswordT> > > >::type* enable =0 > ) > { > value_ = value; > } > > > > private: > Type value_; > };

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[lambda]How to use the member of placeholder in std algorithm?
by 钱晓明 27 Feb '09

27 Feb '09

I have a struct: struct Coordinate { double x, y, z; }; There is no any operator definition for it. I want to sort a array of this struct with 3 elements by comparing the Z value, so: Coordinate coords[3]; ....... std::sort(coords, coords+3, _1 < _2); What should I write to replace "_1 < _2" here? How can I reference the Z member of _1 and _2? I hope I can sort this array without defining any new function. thanks!

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Linking Boost in Code::Blocks
by mothdragon 27 Feb '09

27 Feb '09

Okay, I've been trying to figure this out for a couple of weeks now... I'm using Boost 1.37 on Ubuntu Hardy Heron with Code::Blocks 8.02, Programming in C++.... Now, I'm rather new to Ubuntu, and just as much so programming in Ubuntu... Well, I've been working on this project, and I've been cross-developing it on Windows and Linux, but I've hit a hiccup once i've started using Boost... All works great on Windows using MinGW and Code::Blocks, however I cannot get the same code to run in Linux. The best I can think of is that there's a problem with the linking.... I've added the include path, and the lib path to the search directories, and I've added the libboost_serialization-gcc42-mt-1_37.a to the list of libraries but for some reason it still doesn't work... I get the following error when I try to compile: obj/Debug/Griffin RPG V2.o||In function `extended_type_info_typeid_1':| /usr/include/boost/serialization/extended_type_info_typeid.hpp|77|undefined reference to `boost::serialization::extended_type_info::self_register()'| /usr/include/boost/serialization/extended_type_info_typeid.hpp|77|undefined reference to `boost::serialization::extended_type_info::self_register()'| /usr/include/boost/serialization/extended_type_info_typeid.hpp|77|undefined reference to `boost::serialization::extended_type_info::self_register()'| ]+0x8)||undefined reference to `boost::serialization::detail::extended_type_info_typeid_0::less_than(boost::serialization::extended_type_info const&) const'| ]+0x8)||undefined reference to `boost::serialization::detail::extended_type_info_typeid_0::less_than(boost::serialization::extended_type_info const&) const'| ]+0x8)||undefined reference to `boost::serialization::detail::extended_type_info_typeid_0::less_than(boost::serialization::extended_type_info const&) const'| ||=== Build finished: 6 errors, 0 warnings ===| I've looked everywhere I can think of and chatted on a few IRC's but I haven't been able to get anywhere with this... Because of this I've had to develop only on Windows (Yuck!) and not do any testing in Linux... I take comfort in knowing though that once I get Boost operational, my code will work in Linux too... ( probably better since Linux is so nice to me! ) I'd appreciate any help tat can be offered! -- View this message in context: http://www.nabble.com/Linking-Boost-in-Code%3A%3ABlocks-tp21867302p21867302… Sent from the Boost - Users mailing list archive at Nabble.com.

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