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[Test] Test cases in static libraries
by Jérémy Coulon 06 Oct '11

06 Oct '11

Hi all, I'm currently converting cppunit tests to Boost.Test. Boost test auto-registration is awesome ! I'm now facing a problem and need help from Boost community. mytest -> libFoo.so -> libBar.a Let's say I have a dynamic library Foo which depends on a static library Bar. I created an executable mytest which uses Foo library. It doesn't know about Bar library. So far, I successfully created test cases in mytest for Foo library using the public library interface (exported symbols). I just figured out how to create test cases inside Foo library (for internal non-exported classes) using console_test_runner utility. Question: how do I test code inside Bar static library ? Regards, Jeremy

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Re: [Boost-users] boost::asio::io_service - cancel posted work
by Marat Abrarov 06 Oct '11

06 Oct '11

Hi, Christopher. > Since the callback never happens, my instance never gets destroyed. > > How do I effectively cancel any outstanding work the io_service has posted to > it, such that the smart pointer in the function object that the bind created > will lose its reference count? You can destroy io_service instance. asio::io_service::~io_service destroys all callbacks. Another solution is to close acceptor (and all other instances of asio::basic_io_object related to io_service instance), call asio::io_service::reset() and clear all queued callbacks by running them (asio::io_service::run/poll etc). Regards, Marat Abrarov.

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boost::bind - What if bound (method, instance) doesn't exist anymore?
by Christopher Pisz 06 Oct '11

06 Oct '11

I've got some problem with the shared_ptr usage in my library. I am suspecting its in combination with boost::bind. What happens when a boost::function is called and has been created with a (method, instance) combination, but the instance no longer exists? What happens when this is in combination with boost::asio::io_service? Here is my suspect code: B::SharedPtr me = boost::dynamic_pointer_cast<B, A>(shared_from_this()); callback = boost::bind(&B::Foo, me, boost::asio::placeholder::error); // this is a boost::asio::ip::tcp::acceptor acceptor.async_accept(socket_, callback); Now suppose I use a raw pointer instead. Now suppose the instance that just got bound was destroyed before the accept happened. What will be the result? I'd try to just type up a test myself, but this requires alot of foundation code.

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shared pointer problem - can't destruct
by Christopher Pisz 06 Oct '11

06 Oct '11

I've gotten myself into a situation. I've got a class A that created class Bs class B needs to register callbacks to the class A that created it. So I made member variables in class B that are boost::function type class A binds the method to be called and hands that to class B on construction So, not class A always has a reference count and cannot be destoryed. I tried passing a weak_ptr to boost::bind instead and it won't compile. what to do?

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boost::thread provides semaphore?
by k m 05 Oct '11

05 Oct '11

Hi All I think boost::thread has semaphore back in the version 37. It seems it disappear from the current version. Is that right? If so, why? Thanks! Gary

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boost::asio::io_service - cancel posted work
by Christopher Pisz 05 Oct '11

05 Oct '11

I posted an async_accept to my io_service. The async_accept gets posted again to listen for incoming connections every time it completes. I was under the impression that calling io_service::stop, would be the way to stop listening. When debugging, I see that a function object was created when I called bind inside my async_accept call. That function object contains a smart pointer to the instance of the object to whom the method to call back belongs. Since the callback never happens, my instance never gets destroyed. How do I effectively cancel any outstanding work the io_service has posted to it, such that the smart pointer in the function object that the bind created will lose its reference count? In debugging, the callback never gets called after stop, not does the reference count in the smart pointer decrement.

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[Boost Asio]Difference between asynchronous (proactor pattern) and synchronous model in web server
by Tu Hoang Do 05 Oct '11

05 Oct '11

I'm learning network programming and boost asio on my own, so there's something I need clarification in my understanding.. In synchronous model, when a client connects to the server, both the client and server have to sync with each other to finish some operations. Meanwhile, the asynchronous model allows client and server to work separated and independently. The client sends a request to establish a connection and do something. While the server is processing the request, the client can do something else. Upon completion of an operation, the completion event is placed onto a queue in an Event Demultiplexer, waiting for a Proactor (such as HTTP Handler) to send the request back and invoke a Completion Handler (on the client). The terms are used as in boost::asio document The Proactor Design Pattern: Concurrency Without Threads<http://www.boost.org/doc/libs/1_47_0/doc/html/boost_asio/overview/core/asyn…> . By working this way, the asynchronous model can accepts simultaneous connections without having to create a thread per connection, thus improve overall performance. In order to achieve the same effect as asynchronous model, the first model (synchronous) must be multi-threaded. For more detail, refer to: Proactor Pattern<http://www.google.com/url?sa=t&source=web&cd=1&sqi=2&ved=0CBsQFjAA&url=http…>(I actually learn proactor pattern which is used to asynchronous model from that document. In here it has description on a typical synchronous I/O web server). Is my understanding on the subject correct? If so, which means the asynchronous server can accepts request and return results asynchronously (the first connection request the service on web server does not need to be the first to reply to)? In essence, asynchronous model does not use threading (or threading is used in individual components, such as in the Proactor, Asynchronous Event Multiplexer (boost::asio document) component, not by creating an entire client-server application stack, which is describe in the multi-threaded model in Proactor Pattern document, section 2.2 - *Common Traps and Pitfalls of Conventional Concurrency Models*).

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Cross Compilation problem
by Jose 05 Oct '11

05 Oct '11

Hello all, I have been struggling with this problem for 2 days and I cannot really find a solution. I have a c++ application that I want to cross compile under Fedora 15 to use it with Windows. The packages that my app depends on are already pre-compiled in : /usr/i686-mingw32...../ I am using CMake. It compiles okay and I generate the .exe file without problems. When I try to run it under Windows it complains : "The program cant start because boost_filesystem-gcc45-mt-1_46_1.dll ins missing......." I have boost 1.47 installed in the windows machine but the libraries have a different suffix (...vc-xx-mt...) When I cross compile I do it statically ( I am attaching my toolchain-mingw32 file ) My question is, why is the exe program looking for the boost dll with exactly the same name as it has in the linux machine where the cross compiled exe has been built from?? In my fedora mingw32 lib folder the boost libraries look like this : libboost_filesystem-gcc45-mt-1_46_1.dll·a Is there any way to tell cmake to disregard those suffixes while running in Windows? Is there any way to tell cmake to copy the boost libraries needed for my application into a local folder that will be included inside the the windows installer?? Also while cross compiling I had gotten this error : In file included from /usr/i686-pc-mingw32/sys-root/mingw/include/boost/functional/hash/detail/hash_float.hpp:17, from /usr/i686-pc-mingw32/sys-root/mingw/include/boost/functional/hash/hash.hpp:15, from /usr/i686-pc-mingw32/sys-root/mingw/include/boost/functional/hash.hpp:6, from /usr/i686-pc-mingw32/sys-root/mingw/include/boost/unordered/unordered_set.hpp:17, from /usr/i686-pc-mingw32/sys-root/mingw/include/boost/unordered_set.hpp:16, from /mnt/VirtualBoxShare/percolator/src/ProteinProbEstimatorHelper.h:33, from /mnt/VirtualBoxShare/percolator/src/ProteinProbEstimator.cpp:28: /usr/i686-pc-mingw32/sys-root/mingw/include/boost/cstdint.hpp:105: error: expected unqualified-id before 'unsigned' /usr/i686-pc-mingw32/sys-root/mingw/include/boost/cstdint.hpp:105: error: expected ';' before 'unsigned' /usr/i686-pc-mingw32/sys-root/mingw/include/boost/cstdint.hpp:105: error: declaration does not declare anything /usr/i686-pc-mingw32/sys-root/mingw/include/boost/cstdint.hpp:114: error: expected unqualified-id before 'unsigned' /usr/i686-pc-mingw32/sys-root/mingw/include/boost/cstdint.hpp:114: error: expected ';' before 'unsigned' /usr/i686-pc-mingw32/sys-root/mingw/include/boost/cstdint.hpp:114: error: declaration does not declare anything It seemed boost defines a typedf in cstdint that is already defined in somewhere else, I would guess it is because the windows flag is activated even though it is compiling under linux. I fixed it checking it the definition has been made already but this is not a proper solution. Is it maybe that definition in my code or another cross compiled library? Thank you so much Jose

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excluding tests
by Ovanes Markarian 05 Oct '11

05 Oct '11

Hello *, I currently ran accross an issue, where I need to exclude some particular test cases. I think this can be a useful extension for Boost.Test FW. Would be interesting to hear Gennadiy's opinion and what others think. I also came accross this link, where an extension for Boost Test is implemented to run/exclude platform-dependent tests. Actually I think the idea is great, but don't like the config files as the only options for the test suits. http://www.ncbi.nlm.nih.gov/books/NBK7200/ With Kind Regards, Ovanes

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Problem building Boost on AIX 6.1, xlc 11.1
by Daniel Langr 05 Oct '11

05 Oct '11

Running ./bjam command produces the following error message: /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/tools/build/v2/build/property.jam:455: in property.translate-paths *** argument error * rule path.root ( path root ) * called with: ( ) * missing argument root /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/tools/build/v2/util/path.jam:201:see definition of rule 'root' being called /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/tools/build/v2/build/property-set.jam:386: in property-set.create-from-user-input /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/tools/build/v2/build/targets.jam:1531: in targets.main-target-usage-requirements /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/tools/build/v2/build/alias.jam:68: in alias /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/tools/build/v2/tools/python.jam:964: in configure /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/tools/build/v2/tools/python.jam:111: in python.init /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/tools/build/v2/build/toolset.jam:38: in using libs/python/build/Jamfile.v2:14: in modules.load /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/tools/build/v2/build/project.jam:313: in load-jamfile /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/tools/build/v2/build/project.jam:62: in project.load /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/tools/build/v2/build/project.jam:754: in project.use /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/tools/build/v2/build/project.jam:89: in load-used-projects /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/tools/build/v2/build/project.jam:73: in load /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/tools/build/v2/build/project.jam:168: in project.find /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/tools/build/v2/build-system.jam:553: in load /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/tools/build/v2/kernel/modules.jam:283: in import /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/tools/build/v2/kernel/bootstrap.jam:138: in boost-build /mnt/gpfs.home/langrd/apl/boost/boost_1_40_0/boost-build.jam:16: in module scope I have tried Boost versions 1.47 and 1.40 both with/without IBM patch (https://www-304.ibm.com/support/docview.wss?uid=swg27018656) System AIX 6.1, xlc 11.1, bootstrap command: ./bootstrap.sh --with-toolset=vacpp --with-libraries=program_options,system,filesystem Please help, Daniel

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