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Re: [Boost-users] polymorphic archive use and memory leak
by sam p 04 Dec '08

04 Dec '08

Thanks Guys! I verified your analysis by adding virtual destructor to polymorphic oarchive and mem leak vanished as expected. Currently due to some constraints I cannot move to boost 1.36. In that case, do you think it's sufficient to just add these virtual destructors ? Or there are some other significant fixes related to serialization which also need to be merged from 1.35 code base? -Sameer On 12/3/08, Kim Barrett <kab.conundrums(a)verizon.net> wrote: > > At 10:42 AM +0530 12/3/08, sam p wrote: > >> But if I modify below given code as given below then it doesn't show any >> memory leak. >> I am using boost 1.32. >> > > The virtual destructor for polymorphic_oarchive (and iarchive) was added > relatively recently, I think in boost 1.35. > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

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[boost.build] should we not define _SECURE_SCL=0 by default for all msvc toolsets
by Thorsten Ottosen 04 Dec '08

04 Dec '08

Dear all, Is there are reason why we do not compile with this flag set by default? Are there any users of Boost out there which actually wants the securuty mode turned on? If not, then I suggest that we change the build settings. Thanks in advance -Thorsten

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[boost::ublas] Question on compressed_matrix
by Bastian Sdorra 04 Dec '08

04 Dec '08

Hello everybody, I have a question on ublas::compressed_matrix. I need to build a submatrix of a compressed_matrix. This should also be a compressed_matrix composed out of different rows of the original matrix. I have a std::set containing all row-indicis of the original matrix rows the submatrix should contain. Here is my problem, I can't find a way to do this. I know that there is a way to get rows out of a matrix. But these are dense rows -> too much unneeded data (Is there a way to insert complete rows at all?). Is there a way to copy a row of a compressed_matrix as compressed_vector and insert the vector in another compressed_matrix? I also thought about extracting only the values!=0 of the individual rows like here: http://guwi17.de/ublas/matrix_sparse_usage.html but I don't want to iterate over all rows and test if the set contains the rowindex. It would be very nice, if someone could give me a hint how to solve this problem. Thanks and regards Bastian

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Unable to use boost libraries with xcode 3.1
by framebuffer 04 Dec '08

04 Dec '08

Hi! I am using xcode 3.1 and I am trying to build a 32bit boost test application. I have done this successfully on windows (Header only libraries are working fine in xcode). These are the steps I followed: 1) ./configure --with-libraries=date_time,filesystem,iostreams,program_options,serialization,system,thread 2) sudo make install I dont get any error and the installation says it updated all targets. 3) Next, I create a simple thread application to test: #include <boost/thread/thread.hpp> #include <iostream> void hello() { std::cout <<"Hello world, I'm a thread!"<< std::endl; } int main(int argc, char* argv[]) { boost::thread myThread(&hello); myThread.join(); return 0; } 4) I go to project > edit project settings and add the following two paths in the search path section: /usr/local/lib (for library path) and /usr/local/include/boost-1_37 for header path. BOOST_ROOT is set as /Users/Framebuffer/boost_1_37_0 I have even tried to change it to /usr/local/ but the errors persist I have examined the two folders and the libraries and headers are indeed present there (for eg, libboost_thread-xgcc40-mt-1_37.dylib is in the lib folder) 5) When I try to compile either the debug or release version, I get errors. Here are the errors for debug build results: ========================================== ========================================== Building target “boost” of project “boost” with configuration “Debug” — (9 errors) Checking Dependencies cd /Users/framebuffer/Desktop/boost /Developer/usr/bin/gcc-4.0 -x c++ -arch i386 -fmessage-length=0 -pipe -Wno-trigraphs -fpascal-strings -fasm-blocks -O0 -Wreturn-type -Wunused-variable -D_GLIBCXX_DEBUG=1 -D_GLIBCXX_DEBUG_PEDANTIC=1 -isysroot /Developer/SDKs/MacOSX10.5.sdk -mfix-and-continue -fvisibility-inlines-hidden -mmacosx-version-min=10.5 -gdwarf-2 -iquote /Users/framebuffer/Desktop/boost/build/boost.build/Debug/boost.build/boost-generated-files.hmap -I/Users/framebuffer/Desktop/boost/build/boost.build/Debug/boost.build/boost-own-target-headers.hmap -I/Users/framebuffer/Desktop/boost/build/boost.build/Debug/boost.build/boost-all-target-headers.hmap -iquote /Users/framebuffer/Desktop/boost/build/boost.build/Debug/boost.build/boost-project-headers.hmap -F/Users/framebuffer/Desktop/boost/build/Debug -I/Users/framebuffer/Desktop/boost/build/Debug/include -I/usr/local/include/boost-1_37 -I/Users/framebuffer/Desktop/boost/build/boost.build/Debug/boost.build/DerivedSources -c /Users/framebuffer/Desktop/boost/main.cpp -o /Users/framebuffer/Desktop/boost/build/boost.build/Debug/boost.build/Objects-normal/i386/main.o cd /Users/framebuffer/Desktop/boost /Developer/usr/bin/g++-4.0 -arch i386 -isysroot /Developer/SDKs/MacOSX10.5.sdk -L/Users/framebuffer/Desktop/boost/build/Debug -L/Developer/SDKs/MacOSX10.5.sdk/usr/local/lib -F/Users/framebuffer/Desktop/boost/build/Debug -filelist /Users/framebuffer/Desktop/boost/build/boost.build/Debug/boost.build/Objects-normal/i386/boost.LinkFileList -mmacosx-version-min=10.5 -o /Users/framebuffer/Desktop/boost/build/Debug/boost Undefined symbols: "boost::thread::join()", referenced from: _main in main.o "boost::thread::~thread()", referenced from: _main in main.o _main in main.o "boost::thread_resource_error::thread_resource_error()", referenced from: boost::mutex::mutex()in main.o boost::condition_variable::condition_variable()in main.o "vtable for boost::detail::thread_data_base", referenced from: __ZTVN5boost6detail16thread_data_baseE$non_lazy_ptr in main.o "typeinfo for boost::thread_resource_error", referenced from: __ZTIN5boost21thread_resource_errorE$non_lazy_ptr in main.o "boost::thread::start_thread()", referenced from: boost::thread::thread<void (*)()>(void (*)(), boost::disable_if<boost::is_convertible<void (*&)(), boost::detail::thread_move_t<void (*)()> >, boost::thread::dummy*>::type)in main.o "boost::detail::thread_data_base::~thread_data_base()", referenced from: boost::detail::thread_data<void (*)()>::~thread_data()in main.o boost::detail::thread_data<void (*)()>::~thread_data()in main.o "boost::thread_resource_error::~thread_resource_error()", referenced from: __ZN5boost21thread_resource_errorD1Ev$non_lazy_ptr in main.o "typeinfo for boost::detail::thread_data_base", referenced from: typeinfo for boost::detail::thread_data<void (*)()>in main.o ld: symbol(s) not found collect2: ld returned 1 exit status "boost::thread::join()", referenced from: _main in main.o "boost::thread::~thread()", referenced from: _main in main.o _main in main.o "boost::thread_resource_error::thread_resource_error()", referenced from: boost::mutex::mutex()in main.o boost::condition_variable::condition_variable()in main.o "vtable for boost::detail::thread_data_base", referenced from: __ZTVN5boost6detail16thread_data_baseE$non_lazy_ptr in main.o "typeinfo for boost::thread_resource_error", referenced from: __ZTIN5boost21thread_resource_errorE$non_lazy_ptr in main.o "boost::thread::start_thread()", referenced from: boost::thread::thread<void (*)()>(void (*)(), boost::disable_if<boost::is_convertible<void (*&)(), boost::detail::thread_move_t<void (*)()> >, boost::thread::dummy*>::type)in main.o "boost::detail::thread_data_base::~thread_data_base()", referenced from: boost::detail::thread_data<void (*)()>::~thread_data()in main.o boost::detail::thread_data<void (*)()>::~thread_data()in main.o "boost::thread_resource_error::~thread_resource_error()", referenced from: __ZN5boost21thread_resource_errorD1Ev$non_lazy_ptr in main.o "typeinfo for boost::detail::thread_data_base", referenced from: typeinfo for boost::detail::thread_data<void (*)()>in main.o ld: symbol(s) not found collect2: ld returned 1 exit status Build failed (9 errors) ========================================== ========================================== Both files libboost_thread-xgcc40-mt-1_37.dylib and libboost_thread-xgcc40-mt-1_37.a are present in /usr/local/lib What am I missing? Any help will be appreciated. ALSO, I tried to compile and run a date time example, and it seems to be working fine. (Both debug and release) Below is the code that is working. Other libraries like filesystem etc and not working though. #include "boost/date_time/gregorian/gregorian.hpp" #include "boost/date_time/posix_time/posix_time.hpp" #include <iostream> using namespace boost::gregorian; using namespace boost::posix_time; int main() { date d(2002,Feb,1); //an arbitrary date ptime t1(d, hours(5)+milliseconds(100)); //date + time of day offset ptime t2 = t1 - minutes(4)+seconds(2); ptime now = second_clock::local_time(); //use the clock date today = now.date(); //Get the date part out of the time date tomorrow = today + date_duration(1); ptime tomorrow_start(tomorrow); //midnight //input streaming std::stringstream ss("2004-Jan-1 05:21:33.20"); ss >> t2; //starting at current time iterator adds by one hour time_iterator titr(now,hours(1)); for (; titr < tomorrow_start; ++titr) { std::cout << (*titr) << std::endl; } return 0; } I found this tutorial : http://soulstorm-creations.com/PROJECT_SOULSTORM_2_0/index.php?option=com_c… and I tried his method and its giving the same 9 errors out of the box. Thanks, fb. -- View this message in context: http://www.nabble.com/Unable-to-use-boost-libraries-with-xcode-3.1-tp208270… Sent from the Boost - Users mailing list archive at Nabble.com.

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boost asio async_read_some
by Chris Freehill 04 Dec '08

04 Dec '08

Hi, I've been struggling for a while trying to get async_read_some() to call the handler I provided, but it never seems to happen. However, the buffer provided does seem to be written with the expected data from the tcp/ip socket I'm using. Here's a simplified version of my call and handler: unsigned char tmpBuffer[512]; //global void MyClass::handler(const boost::system::error_code& error, size_t bytes_transferred) { boost::system::error_code e; std::cerr << "handler called()" << "\n"; } void MyClass::test() { ... socketPtr->async_read_some(boost::asio::buffer(tmpBuffer, 512), boost::bind(&MyClass::handler, this, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred)); } Can anyone give me any idea as to how I can get my handler to be called? The other thing worth mentioning is that if I use read_some() instead, I get the expected data. In the documentation for this method (see link below), http://www.boost.org/doc/libs/1_37_0/doc/html/boost_asio/reference/basic_st… there is the comment "Regardless of whether the asynchronous operation completes immediately or not, the handler will not be invoked from within this function. Invocation of the handler will be performed in a manner equivalent to using boost::asio::io_service::post()." I'm not sure exactly what this means...what is this equivalent manner that is mentioned? Thanks, Chris

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[Proto] Detecting series of operator in grammar
by Joel Falcou 04 Dec '08

04 Dec '08

How can I write a transform that matches expression like a0+a1+a2+ ... +an (with N +) and turn into a custom node like sum(a0,a1,...,an) Thanks in advance -- ___________________________________________ Joel Falcou - Assistant Professor PARALL Team - LRI - Universite Paris Sud XI Tel : (+33)1 69 15 66 35

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Re: [Boost-users] [review][constrained_value] Review of ConstrainedValue Library begins today
by raindog＠macrohmasheen.com 04 Dec '08

04 Dec '08

Another example: 6 represents june. 6 + 3 is then 3 months after june, otherwise september. 6 + 12 is the next june. ------Original Message------ From: Edward Diener Sender: boost-users-bounces(a)lists.boost.org To: boost-users(a)lists.boost.org Cc: boost(a)lists.boost.org ReplyTo: boost-users(a)lists.boost.org Sent: Dec 3, 2008 8:03 PM Subject: Re: [Boost-users] [review][constrained_value] Review of ConstrainedValue Library begins today Deane Yang wrote: > Edward Diener wrote: >> Deane Yang wrote: >>> >>> I have an even more extreme view on this. I don't believe any >>> arithmetic operations should be permitted for constrained numbers. >>> They just don't make sense (would you ever want to add two different >>> days of a month?). >> >> You have chosen a particular type for which arithmetic operations >> sometimes make little sense. In many other situations this is not the >> case. > > > Could you give an example? An example of what ? Of a constraint where arithmetic operations make sense ? If we take a constraint representing a percentage between 0 and 100, I think it is perfectly valid to add a percent to what is already there. That is just one of innumerable cases where arithmetic operations of contraints seem perfectly valid to me. Why would you even want to consider limiting constraints by removing arithmetic operations if the underlying type supports such operations ? _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users Sent from my Verizon Wireless BlackBerry

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Re: [Boost-users] [review][constrained_value] Review of ConstrainedValue Library begins today
by raindog＠macrohmasheen.com 04 Dec '08

04 Dec '08

I totally agree. Pre contstraining a value for assignment to constrained_value seems to defeat the purpose of the library all together. ------Original Message------ From: Edward Diener Sender: boost-users-bounces(a)lists.boost.org To: boost-users(a)lists.boost.org Cc: boost(a)lists.boost.org ReplyTo: boost-users(a)lists.boost.org Sent: Dec 3, 2008 7:58 PM Subject: Re: [Boost-users] [review][constrained_value] Review of ConstrainedValue Library begins today Mathias Gaunard wrote: > Edward Diener wrote: > >> I disagree with your analysis. The '26' value could be a run-time >> calculation and not just a compile-time constant. In which case you >> are saying that the assignment of a run-time calculation should assert >> only when run in debug mode and otherwise should be ignored. I can not >> agree with that idea. > > I say it is up to the programmer to ensure valid values are provided. > If the value is only known at runtime, there should be explicit checking > in the code prior to assignment. Suppose the value is provided by the end user of the program. Do you still feel such a value, when used in a constraint, should assert only in debug mode rather than throw an exception ? A large part of the constrained value concept is that the constraint provides the necessary checking, in the form of a policy, which alleviates specific pre-checking by the programmer. I like that, else the constraint library serves less purpose than it could. _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users Sent from my Verizon Wireless BlackBerry

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How to pass a shared_ptr to a thread.
by Jason Cipriani 04 Dec '08

04 Dec '08

Hi, I'm new to boost. I'm using it for the shared_ptr implementation. I have a usage question. On Windows, a thread function takes a void* parameter. If I have a shared_ptr to an object, what's the correct way to pass that to a new thread? E.g.: DWORD WINAPI threadproc (LPVOID something) { // how to get a shared_ptr through "something"? ... } void create5threads () { ... shared_ptr p(new Object); // what should "something" be if i want to pass p to the new threads, incrementing its use count? CreateThread(..., &threadproc, (LPVOID)something, ...); CreateThread(..., &threadproc, (LPVOID)something, ...); CreateThread(..., &threadproc, (LPVOID)something, ...); CreateThread(..., &threadproc, (LPVOID)something, ...); CreateThread(..., &threadproc, (LPVOID)something, ...); } Sorry if this is a stupid question, but the only thing I could think of was "(LPVOID)new shared_ptr(p)", but that means each thread must explicitly delete the new shared_ptr and that kind of defeats the purpose! Thanks, Jason

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Questions about Program_options
by Yang Zhang 03 Dec '08

03 Dec '08

Hi, I'm currently enjoying using Program_options, and I have a few questions/comments about it. Is it necessary to create and use a variable_map for parsing program options? Is there a way to forgo this if I've already used value<T>(T*) to bind the options to other storage locations? What is notify() for, exactly? This is not really described in the documentation. It may be worth mentioning bool_switch somewhere in the documentation. (I dug this up from the header files.) Can I access positional arguments without going through the positional_options_description? My program is "variadic" and takes either 1 or 2 arguments (where the first has a completely different meaning depending on the number of args). I realize I can assign meaningless names in the positional_options_description, like "arg0," "arg1," etc., but I'm just wondering if there's already a way to access the raw positional arguments without going through the positional_options_description boilerplate. Is there a way to specify a *hierarchy* of command-line parameters, such as those found in svn (a two-layer hierarchy), git, etc.? If not, consider this a feature request! In svn, for instance, there are global options, there's the exact command, and then there are sub-options associated with the command. See the Python argparse module for an example of such a library design: http://argparse.python-hosting.com/ Thanks in advance for any answers. -- Yang Zhang http://www.mit.edu/~y_z/

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