November 2010 - Boost-users

boost interprocess: memory allocation container
by Carla Strembicke 23 Nov '10

23 Nov '10

Hello, I am using boost 1.44 and trying to create shared memory and utilizing the segment manager with a interprocess map. I continually get a compile error when call the segment manager construct call. I can't figure out what the problem is. I have tried copy/paste example but continue to get the same error. "/usr/local/boost_1_44_0/boost/interprocess/detail/named_proxy.hpp:123:131: error: no matching function for call to 'forward(std::less<int>()&)' Below is the snippet of code: string driver_share = _cc.share_name + "_drivers"; using namespace boost::interprocess; //Clean up before creating shared memory shared_memory_object::remove(driver_share.c_str()); managed_shared_memory segment(create_only, driver_share.c_str(),65536); typedef boost::process::pid_type key_type; typedef boost::posix_time::ptime value_type; typedef std::pair<key_type, value_type> pair_type; typedef boost::interprocess::allocator<pair_type, managed_shared_memory::segment_manager> mem_allocator; typedef boost::interprocess::map<key_type, value_type, std::less<key_type>, mem_allocator> driver_map; const mem_allocator alloc_instance(segment.get_segment_manager()); driver_map *dmap = segment.construct<driver_map>("DriverMap")( std::less<int>(), alloc_instance); My include files are as follows: #include <boost/thread/thread.hpp> #include <boost/date_time/posix_time/posix_time_types.hpp> #include <boost/interprocess/managed_shared_memory.hpp> #include <boost/process/all.hpp> #include <boost/interprocess/allocators/allocator.hpp> #include <boost/interprocess/containers/map.hpp> #include <map> #include <functional> #include <iostream> using namespace boost; using namespace boost::posix_time; using namespace std; IF you know of any reason why I get this error that would be great.........I will continue to read the boost documentation. Regards carla Carla Strembicke Software Developer [cid:imagebf0008.jpg@2cac8a6e.ad7c4515] SUBNET Solutions Inc. www.SUBNET.com<http://www.subnet.com/> Making Substations More Intelligent T: 403.270.8885 F: 403.270.9631 #100, 4639 Manhattan Road SE, Calgary, Alberta, Canada; T2G 4B3 CONFIDENTIAL INFORMATION NOTICE: The information contained in this e-mail is privileged, confidential and intended solely for the use of the addressee named above. If the reader of this e-mail is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this e-mail is strictly prohibited. If you received this in error, please contact the sender and destroy all copies of this e-mail. Thank you.

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[boost-users] [ptr_container] Genericity on containers
by Eloi Du Bois 23 Nov '10

23 Nov '10

Hi, I would like to know why is'nt that working: boost::ptr_vector<B> p1; boost::ptr_vector<B> p2; std::vector<B> v1; boost::ptr_vector<A, boost::view_clone_allocator> pview; // add elements... p1 = p2; pview = p1; // p1 = v1; // don't work // pview = v1; // don't work It should be working, or would be interesting to get working. Thank you, Eloi Du Bois.

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Re: [Boost-users] Hybrid parallelism, no more + mpi+serialization, many questions
by Hicham Mouline 23 Nov '10

23 Nov '10

> Here's how I'd probably do this using a pull model: > <snip> > Brian Hi Brian, Thanks for the solution. I think I'll go first just with monothread mpi processes. Can I use MPI splitting the communicators following my tree's shape? Does MPI allow splitting world, and then splitting again, then again....? rds,

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Lexical_cast and VC ExpresEdition 2010
by Claude 23 Nov '10

23 Nov '10

Hi! I use the line: uint32_t& c; string str("10); [...] c = lexical_cast<uint32_t>(str); I obtaing link error with VC 2010 (I use the code::blocks IDE): error LNK2019: riferimento al simbolo esterno "void __cdecl boost::throw_exception(class std::exception const &)" (?throw_exception@boost@@YAXABVexception@std@@@Z) non risolto nella funzione "unsigned int __cdecl boost::detail::lexical_cast<unsigned int,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,0,char>(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,char *,unsigned int)" (??$lexical_cast@IV?$basic_string@DU?$char_LIBCMT.lib(wincrt0.obj)||error LNK2019: riferimento al simbolo esterno _WinMain@16 non risolto nella funzione ___tmainCRTStartup| LockFile.exe||fatal error LNK1120: 2 esterni non risolti But the same code in GCC under Linux work well. Why? -- View this message in context: http://boost.2283326.n4.nabble.com/Lexical-cast-and-VC-ExpresEdition-2010-t… Sent from the Boost - Users mailing list archive at Nabble.com.

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icc ULONG_MAX/UINT_MAX vs msvc ULONG_MAX/UINT_MAX
by Hai Nguyen 23 Nov '10

23 Nov '10

Hi, I'm running into a case where the Intel compiler is seeing mt19937 as: typedef random::mersenne_twister< unsigned long, 32, 624, 397, 31, 0x9908b0df, 11, 7, 0x9d2c5680, 15, 0xefc60000, 18, 3346425566U > mt19937; and MSVC is seeing it as: typedef random::mersenne_twister< unsigned int, 32, 624, 397, 31, 0x9908b0df, 11, 7, 0x9d2c5680, 15, 0xefc60000, 18, 3346425566U > mt19937; ...it's defined as: typedef random::mersenne_twister< uint32_t, 32, 624, 397, 31, 0x9908b0df, 11, 7, 0x9d2c5680, 15, 0xefc60000, 18, 3346425566U > mt19937; This is leading to a link time problem. I'm a bit lost as to what to do since the lib I'm depending on is compiled with the Intel compiler and my client program is using MSVC. >From my very brief look - it seems that uint32_t is controlled via ULONG_MAX and UINT_MAX - I was wondering if someone could shed some light on how the Intel compiler handles ULONG_MAX and UINT_MAX. I couldn't find its limits.h to figure out what it was doing. Also - is there a work around for cases like this? Thanks, Hai

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BOOST_PROTO_EXTENDS_USING_ASSIGN
by Hossein Haeri 23 Nov '10

23 Nov '10

Dear all, When I compile the example right after http://beta.boost.org/doc/libs/1_45_0/doc/html/proto/users_guide.html#boost… I get the following error in GCC 4.5.0 (MinGW32, WinXPSP2): error: ISO C++ forbids declaration of 'BOOST_PROTO_EXTENDS_USING_ASSIGN' with no type error: expected ';' before 'typedef' I first thought that that's because I haven't included the right set of headers. Replaced them all with #include <boost/proto/proto.hpp> and the problem remains intact. Any suggestions? TIA, --Hossein

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[Tuple] augment_tuple, patch, or whatever... maybe MPL?
by Hossein Haeri 23 Nov '10

23 Nov '10

Dear all, Is there any function in Boost.Tuple which works like this for n-tuples for any given n? template<typename T1, typename T2, typename T3> tuples::tuple<T1, T2, T3> augment_tuple(tuples::tuple<T1, T2> tup, T3 t3) { return tuples::make_tuple(tup.get<0>(), tup.get<1>(), t3); } (Obviously, here n == 2.) The purpose of this augment_tuple (or, patch, or whatever) is to take an n-tuple and a new element and patch the new element to the end of the n-tuple in order to get a (n + 1)-tuple. Repetitive code which can produce enough overloads for a large enough n is of course trivial. I'm wondering whether MPL has a utility which can automated this though? TIA, --Hossein

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Re: [Boost-users] [Property-tree] Boost 1.45 with Intel Compiler + VS 2010 compile error
by Edward Rankin 23 Nov '10

23 Nov '10

Thanks for the reply, Eric. > On 11/22/2010 8:57 PM, Edward Rankin wrote: >> Hi, >> >> I am trying to compile boost 1.45 using the recently released Intel >> Composer XE 2011 for Windows. I am running into the same error as >> described in ticker 4092 >> (https://svn.boost.org/trac/boost/ticket/4092) I have changed the >> check for BOOST_MSVC to include BOOST_INTEL_WIN (line 19 of >> boost/property_tree/detail/ptree_implementation.hpp) and can compile >> successfully. > <snip> > > Sounds like good information to the attach to the bug report. I have added a comment to the ticket. Is that sufficient? Sorry, I am not too familiar with how things work around here. Thanks, Edward

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[Property-tree] Boost 1.45 with Intel Compiler + VS 2010 compile error
by Edward Rankin 23 Nov '10

23 Nov '10

Hi, I am trying to compile boost 1.45 using the recently released Intel Composer XE 2011 for Windows. I am running into the same error as described in ticker 4092 (https://svn.boost.org/trac/boost/ticket/4092) I have changed the check for BOOST_MSVC to include BOOST_INTEL_WIN (line 19 of boost/property_tree/detail/ptree_implementation.hpp) and can compile successfully. Not sure if this is the proper fix, so I hope the author/maintainer can look into this and fix this. Thanks! Edward

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Conditional thread join
by Chris 23 Nov '10

23 Nov '10

Hello. I have following small program (pseudocode): void Read() { do { // ... } while (...); } // Read() void Write() { do { // ... } while (...); } // Write() boost::thread thrd1(Read); boost::thread thrd2(Write); // I don't want the following thrd1.join(); thrd2.join(); No, I want to stop when either thread finishes something like a join_any(). Does that exist? greetings Chris } while (...); } // Write() boost::thread thrd1(Read); boost::thread thrd2(Write); // I don't want the following thrd1.join(); thrd2.join(); No, I want to stop when either thread finishes something like a conditional join. Does that exist? greetings Chris

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