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using AM and PM with boost::posix_time newbie
by Adam Zedan 23 Sep '11

23 Sep '11

the following code works properly std::string ts("2002-01-20 10:27:30"); boost::posix_time::ptime t(boost::posix_time::time_from_string(ts)); std::cout << t.time_of_day() << "\n"; 1) Now i want to actually change the string to std::string ts("2002-01-20 10:27:30 AM"); but that wont work ?? Why any suggestions would be appreciated?? 2) also to display time i am using boost::posix_time::ptime pc(boost::posix_time::second_clock::local_time()); std::cout << pc.time_of_day() << "\n"; //output is 10:55:30 how could i make it display am/pm in the output ??

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Building boost.log
by Sillence, Martin (GE Oil & Gas) 23 Sep '11

23 Sep '11

Hi, We're using boost 1.47 and are interested in also using boost.log, I see some promising posts about using this in production: http://thread.gmane.org/gmane.comp.lib.boost.devel/221431 How are people building this, when we try (with the tunk from svn) it depends on boost.move which clashes with some of the functionality within boost 1.47 Is it possible to co-exist with 1.47 or are people using it with an older library? Thanks, M

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Boost::object_pool - Memory allocation problems
by Christian Berg 23 Sep '11

23 Sep '11

#include <boost/pool/object_pool.hpp> class test { test(void){}; public: std::vector<const int*> m_a1; int* m_b1; int* m_b2; const int* m_c1; const int* m_c2; const std::string* m_d1; unsigned int m_e1; unsigned int m_e2; unsigned char m_f1; unsigned char m_f2; unsigned char m_f3; unsigned char m_f4; }; static boost::object_pool<test> s_my_pool; int main(int argc, char* argv[]) { int max = 2097120; for(int i = 0; i < max; i++) { test* tst_c = s_my_pool.construct(test()); } Consider the code above. Compiled with Visual Studio 2010. The purpose of the class is not important. It is its size (48 bytes) that matters. The goal is to use object_pool to minimize memory usage. When running this code the memory rises with just a few bytes more than the needed 48 bytes * 2.097.120 = 100.661.760 bytes, hence the object_pool seems to be working fine. But if I increase the number of elements created by one (to 2097121) the memory use rises to a massive 200.000.000+ bytes. It seems that the object_pool has reached a threshold and that the strategy then is to double the allocated memory. But this can't be right, can it? If so the object_pool is useless because it's using more memory than a simple test* tst = new test(); would have done. Why is object_pool acting like this and is there a way to change the behavior? PS! The threshold value is not exactly the same in another application I have made, but it is pretty close. Best Regards Christian Berg

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Cross-compiling: Errors compiling with qcc toolset for qnx target-os from linux host
by Félix Robles 23 Sep '11

23 Sep '11

Hi, I've got KUbuntu 64bits installed: Linux findeton-PC 2.6.38-11-generic #48-Ubuntu SMP Fri Jul 29 19:02:55 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux I want to compile boost using qcc toolset for a qnx target-os from a linux host, so I execute: $ ./bootstrap.sh And it goes fine, it uses the gcc compiler, not qcc, because I want to execute b2 in my linux machine. Then I use the following command: $ ./b2 --build-dir=/home/findeton/boost_1_47_0/ toolset=qcc target-os=qnx --build-type=complete --layout=tagged -q -a And this is the kind of output I get: qcc.compile.c++ /home/findeton/boost_1_47_0/boost/bin.v2/libs/python/build/qcc/debug/link-static/target-os-qnx/numeric.o In file included from ./boost/integer_fwd.hpp:17, from ./boost/integer.hpp:18, from ./boost/function/function_base.hpp:21, from ./boost/function/detail/prologue.hpp:17, from ./boost/function/function_template.hpp:13, from ./boost/function/detail/maybe_include.hpp:13, from ./boost/function/function0.hpp:11, from ./boost/python/errors.hpp:13, from ./boost/python/handle.hpp:11, from ./boost/python/converter/arg_to_python_base.hpp:7, from ./boost/python/converter/arg_to_python.hpp:14, from ./boost/python/call.hpp:15, from ./boost/python/object_core.hpp:14, from ./boost/python/object.hpp:9, from ./boost/python/tuple.hpp:10, from ./boost/python/numeric.hpp:10, from libs/python/src/numeric.cpp:6: ./boost/cstdint.hpp:74: error: 'intleast8_t' in namespace '::' does not name a type ./boost/cstdint.hpp:75: error: 'intfast8_t' in namespace '::' does not name a type ./boost/cstdint.hpp:76: error: 'uintleast8_t' in namespace '::' does not name a type ./boost/cstdint.hpp:77: error: 'uintfast8_t' in namespace '::' does not name a type ./boost/cstdint.hpp:79: error: 'intleast16_t' in namespace '::' does not name a type ./boost/cstdint.hpp:80: error: 'intfast16_t' in namespace '::' does not name a type ./boost/cstdint.hpp:81: error: 'uintleast16_t' in namespace '::' does not name a type ./boost/cstdint.hpp:82: error: 'uintfast16_t' in namespace '::' does not name a type ./boost/cstdint.hpp:84: error: 'intleast32_t' in namespace '::' does not name a type ./boost/cstdint.hpp:85: error: 'intfast32_t' in namespace '::' does not name a type ./boost/cstdint.hpp:86: error: 'uintleast32_t' in namespace '::' does not name a type ./boost/cstdint.hpp:87: error: 'uintfast32_t' in namespace '::' does not name a type ./boost/cstdint.hpp:91: error: 'intleast64_t' in namespace '::' does not name a type ./boost/cstdint.hpp:92: error: 'intfast64_t' in namespace '::' does not name a type ./boost/cstdint.hpp:93: error: 'uintleast64_t' in namespace '::' does not name a type ./boost/cstdint.hpp:94: error: 'uintfast64_t' in namespace '::' does not name a type cc: /opt/qnx650/host/linux/x86/usr/lib/gcc/i486-pc-nto-qnx6.5.0/4.4.2/cc1plus error 1 "QCC" -Wc,-ftemplate-depth-128 -gstabs+ -O0 -Wc,-fno-inline -DBOOST_ALL_NO_LIB=1 -DBOOST_PYTHON_SOURCE -DBOOST_PYTHON_STATIC_LIB -I"." -I"/usr/include/python2.7" -c -o "/home/findeton/boost_1_47_0/boost/bin.v2/libs/python/build/qcc/debug/link-static/target-os-qnx/numeric.o" "libs/python/src/numeric.cpp" ...failed qcc.compile.c++ /home/findeton/boost_1_47_0/boost/bin.v2/libs/python/build/qcc/debug/link-static/target-os-qnx/numeric.o... qcc.compile.c++ /home/findeton/boost_1_47_0/boost/bin.v2/libs/python/build/qcc/debug/link-static/target-os-qnx/list.o In file included from ./boost/integer_fwd.hpp:17, from ./boost/integer.hpp:18, from ./boost/function/function_base.hpp:21, from ./boost/function/detail/prologue.hpp:17, from ./boost/function/function_template.hpp:13, from ./boost/function/detail/maybe_include.hpp:13, from ./boost/function/function0.hpp:11, from ./boost/python/errors.hpp:13, from ./boost/python/handle.hpp:11, from ./boost/python/converter/arg_to_python_base.hpp:7, from ./boost/python/converter/arg_to_python.hpp:14, from ./boost/python/call.hpp:15, from ./boost/python/object_core.hpp:14, from ./boost/python/object.hpp:9, from ./boost/python/list.hpp:10, from libs/python/src/list.cpp:5: ./boost/cstdint.hpp:74: error: 'intleast8_t' in namespace '::' does not name a type ./boost/cstdint.hpp:75: error: 'intfast8_t' in namespace '::' does not name a type ./boost/cstdint.hpp:76: error: 'uintleast8_t' in namespace '::' does not name a type ./boost/cstdint.hpp:77: error: 'uintfast8_t' in namespace '::' does not name a type ./boost/cstdint.hpp:79: error: 'intleast16_t' in namespace '::' does not name a type ./boost/cstdint.hpp:80: error: 'intfast16_t' in namespace '::' does not name a type ./boost/cstdint.hpp:81: error: 'uintleast16_t' in namespace '::' does not name a type ./boost/cstdint.hpp:82: error: 'uintfast16_t' in namespace '::' does not name a type ./boost/cstdint.hpp:84: error: 'intleast32_t' in namespace '::' does not name a type ./boost/cstdint.hpp:85: error: 'intfast32_t' in namespace '::' does not name a type ./boost/cstdint.hpp:86: error: 'uintleast32_t' in namespace '::' does not name a type ./boost/cstdint.hpp:87: error: 'uintfast32_t' in namespace '::' does not name a type ./boost/cstdint.hpp:91: error: 'intleast64_t' in namespace '::' does not name a type ./boost/cstdint.hpp:92: error: 'intfast64_t' in namespace '::' does not name a type ./boost/cstdint.hpp:93: error: 'uintleast64_t' in namespace '::' does not name a type ./boost/cstdint.hpp:94: error: 'uintfast64_t' in namespace '::' does not name a type cc: /opt/qnx650/host/linux/x86/usr/lib/gcc/i486-pc-nto-qnx6.5.0/4.4.2/cc1plus error 1 "QCC" -Wc,-ftemplate-depth-128 -gstabs+ -O0 -Wc,-fno-inline -DBOOST_ALL_NO_LIB=1 -DBOOST_PYTHON_SOURCE -DBOOST_PYTHON_STATIC_LIB -I"." -I"/usr/include/python2.7" -c -o "/home/findeton/boost_1_47_0/boost/bin.v2/libs/python/build/qcc/debug/link-static/target-os-qnx/list.o" "libs/python/src/list.cpp" ...failed qcc.compile.c++ /home/findeton/boost_1_47_0/boost/bin.v2/libs/python/build/qcc/debug/link-static/target-os-qnx/list.o... [ And after some of those, then I get some of this kind : ] qcc.compile.c++ /home/findeton/boost_1_47_0/boost/bin.v2/libs/serialization/build/qcc/release/target-os-qnx/threading-multi/binary_iarchive.o In file included from ./boost/serialization/extended_type_info_typeid.hpp:34, from ./boost/archive/detail/iserializer.hpp:47, from ./boost/archive/detail/interface_iarchive.hpp:22, from ./boost/archive/detail/common_iarchive.hpp:23, from ./boost/archive/basic_binary_iarchive.hpp:31, from ./boost/archive/binary_iarchive_impl.hpp:22, from ./boost/archive/binary_iarchive.hpp:20, from libs/serialization/src/binary_iarchive.cpp:14: ./boost/serialization/factory.hpp:28: error: '::va_list' has not been declared cc: /opt/qnx650/host/linux/x86/usr/lib/gcc/i486-pc-nto-qnx6.5.0/4.4.2/cc1plus error 1 "QCC" -Wc,-ftemplate-depth-128 -O3 -Wc,-finline-functions -Wc,-Wno-inline -shared -DBOOST_ALL_NO_LIB=1 -DBOOST_SERIALIZATION_DYN_LINK=1 -DNDEBUG -I"." -c -o "/home/findeton/boost_1_47_0/boost/bin.v2/libs/serialization/build/qcc/release/target-os-qnx/threading-multi/binary_iarchive.o" "libs/serialization/src/binary_iarchive.cpp" ...failed qcc.compile.c++ /home/findeton/boost_1_47_0/boost/bin.v2/libs/serialization/build/qcc/release/target-os-qnx/threading-multi/binary_iarchive.o... qcc.compile.c++ /home/findeton/boost_1_47_0/boost/bin.v2/libs/serialization/build/qcc/release/target-os-qnx/threading-multi/binary_oarchive.o In file included from ./boost/serialization/extended_type_info_typeid.hpp:34, from ./boost/archive/detail/oserializer.hpp:38, from ./boost/archive/detail/interface_oarchive.hpp:23, from ./boost/archive/detail/common_oarchive.hpp:22, from ./boost/archive/basic_binary_oarchive.hpp:34, from ./boost/archive/binary_oarchive_impl.hpp:23, from ./boost/archive/binary_oarchive.hpp:21, from libs/serialization/src/binary_oarchive.cpp:14: ./boost/serialization/factory.hpp:28: error: '::va_list' has not been declared ¿What is wrong, how can I solve it?

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Re: [Boost-users] [Enable-if] Selectively instantiating methods.
by Ivan Le Lann 23 Sep '11

23 Sep '11

----- "Robert Jones" <robertgbjones(a)gmail.com> a écrit : > Hi All > > > This doesn't work. > > > > template<typename T> struct S > { > typename disable_if<is_const<T>, int>::type mutating_method(); > } ; > > This thread might be related : http://lists.boost.org/Archives/boost/2011/08/184454.php Hope this helps, Ivan

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Compilation of boost on HP-UX 11iv3 using aCC
by Pravar 23 Sep '11

23 Sep '11

Hi All, I am trying to compile boost 1.45.0 on HP-UX with HP compiler ( acc ) having version A.06.26. OS version : HP-UX 11iV3 on IA-64 _Question_ : Does anyone has experience of compiling boost with aCC compiler ? Does boost listed aCC as supported compilers ? As I tried to compile and compilation failed at points generating errors. I need to use boost for some production level software and if such issues occur, I wonder i may not be able to use boost on HP-UX. I earlier thought for using gcc, but it is no longer supported on HP-UX and it is risky to use it for production work. Please provide some directions in this regard. It will be immensely helpful for me. Thanks and Best Regards, Pravar DISCLAIMER: ----------------------------------------------------------------------------------------------------------------------- The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. It shall not attach any liability on the originator or NECHCL or its affiliates. Any views or opinions presented in this email are solely those of the author and may not necessarily reflect the opinions of NECHCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of the author of this e-mail is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. . -----------------------------------------------------------------------------------------------------------------------

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[Phoenix] expression does not name a type
by Júlio Hoffimann 23 Sep '11

23 Sep '11

Dear all, I can't understand why this test case is not compiling: #include <boost/function.hpp>#include <boost/phoenix/core/argument.hpp>#include <boost/phoenix/operator.hpp>#include <iostream> using namespace boost::phoenix::placeholders; expression::argument<1>::type X; int main ( int argc, char *argv[] ){ boost::function<int(int)> f; f = if_else( X == 0, X, X*2 ); std::cout << f(0) << f(12) << std::endl; return 0;} // ---------- end of function main ---------- The error message says 'expression' does not name a type. I've tried to explicitly play with boost::phoenix namespaces, but doesn't work. Appreciate any help, Júlio. P.S.: Boost 1.47 / GCC 4.5

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[Intrusive] Using a mutex-guarded smart pointer to achieve thread-safety
by Ioannis Papadopoulos 22 Sep '11

22 Sep '11

Hi, I was looking over Boost.Intrusive and specifically the section regarding smart pointers. I am mostly interested in the linked lists, so I don't have any need for size(); auto-unlink however is extremely useful to me. If I replace the default pointer with my thread-safe smart_ptr-like type (for example a wrapper that instead of doing reference counting, it guards the pointers with a mutex), do you think that the resulting intrusive container will be thread-safe? Has anyone attempted anything similar? Thanks

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Interval Timer
by asif saeed 22 Sep '11

22 Sep '11

Hi, I need an interval timer to continuously call my callback function after every n milliseconds/seconds for ever once I set it up. I also need the ability to kill/cancel the timer. Does Boost provide such a facility now? Sincerely, Asif

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[Timer] Using progress timers.
by Robert Jones 21 Sep '11

21 Sep '11

Hi All, > cat progress.cpp #include <boost/progress.hpp> int main( ) { boost::progress_timer t; sleep( 5 ); return 0; } > g++ progress.cpp > ./a.out 0.00 s I was expecting a number >= 5.00 s! What am I missing? Thx, Rob.

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