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[ptr_container] Regression: ptr_multimap breaks Wextra build in version 1.49.0
by Philipp Münzel 29 Jun '12

29 Jun '12

Hi fellows, I'm using gcc 4.2.1 on OSX 10.7.4 and I've recently updated from boost 1.47 to 1.49.0. My project uses ptr_multimaps. My project is configured to use the gcc flags -Werror -Wall -Wextra because I like to be alerted early if something can go wrong. Using -Werror is kind of a self-imposed restriction to keep my code clean of dirty hacks. I've been used to compile my code this way since about boost 1.44. With the update to 1.49 however, building with -Werror -Wextra is no longer possible, because I'm getting the following warning: /usr/local/boost/include/boost/ptr_container/ptr_map_adapter.hpp: In copy constructor 'boost::ptr_multimap_adapter<T, VoidPtrMultiMap, CloneAllocator, Ordered>::ptr_multimap_adapter(const boost::ptr_multimap_adapter<T, VoidPtrMultiMap, CloneAllocator, Ordered>&) [with T = Foo, VoidPtrMultiMap = std::multimap<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void*> > >, CloneAllocator = boost::heap_clone_allocator, bool Ordered = true]': /usr/local/boost/include/boost/ptr_container/ptr_map.hpp:89: instantiated from here /usr/local/boost/include/boost/ptr_container/ptr_map_adapter.hpp:727: warning: base class 'class boost::ptr_container_detail::ptr_map_adapter_base<Foo, std::multimap<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void*> > >, boost::heap_clone_allocator, true>' should be explicitly initialized in the copy constructor The only possibility to compile this is to remove -Wextra, because gcc has no separate warning option to turn off the copy constructor check (see [1]), so I lose not only this check, but also everything else enabled by -Wextra, which I'd be very unhappy with. For the time being, I just removed -Werror, but this totally clutters up my build output now, which usually allows me to spot every problem really quick, because it is so brief. Since this is a regression (it worked until the 1.49.0 update), I'd be happy if someone can check how this was introduced in 1.49.0 and open a ticket for the incriminating change. Regards, Philipp [1] http://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html

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Re: [Boost-users] Visual Studio Express
by Tom Kent 28 Jun '12

28 Jun '12

Last I checked, the express editions of visual studio (vc8,vc9,vc10) wouldn't build all the debugging info into libraries. I just went searching on Microsoft's website, but couldn't find anywhere that spells out what is/isn't included with the express versions. Beyond that, there have been announcements that the VC11 express version wasn't going to be able to make non-metro apps. I think they have gone back on this, but it still sounds like it will be limited. I haven't looked into this issue for a few years, so it is quite likely that I'm wrong. I'd love to hear from someone with better knowledge on this issue. Tom On Thu, Jun 28, 2012 at 12:52 PM, David Sankel <camior(a)gmail.com> wrote: > On Thu, Jun 28, 2012 at 10:13 AM, Tom Kent <lists(a)teeks99.com> wrote: > >> I've built windows libraries (vc8, vc9, vc10) for this (32 and 64 >> bit), if you want them, you can get them from my website: >> http://boost.teeks99.com >> >> I'm also looking for a donation of VC11 when it comes out (express won't >> work). >> > > Why won't express work? > > David > > -- > David Sankel > Sankel Software > www.sankelsoftware.com > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users >

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self-referential boost functions
by Adam Crain 28 Jun '12

28 Jun '12

Inquiring as to whether this is possible or if there is a better pattern for simulating this behavior... Is it possible for boost::function to be self referential? I.e. how do I simulate behavior like the following: typedef boost::function<Func (int)> Func; A function that does something mutable and then returns the next function to be called or an empty function. thanks, Adam

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Re: [Boost-users] compilation error using boost/property_tree/ptree.hpp
by Pramod Subramanyan 28 Jun '12

28 Jun '12

Thanks for the tip, Lars. That was indeed the problem - one of the libraries we are using was defining a fail macro. Pramod

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compilation error using boost/property_tree/ptree.hpp
by Pramod Subramanyan 28 Jun '12

28 Jun '12

I am trying to use boost/property_tree/ptree.hpp in my application. All I have done so far is just add the following include statements to my program: > #include <boost/property_tree/ptree.hpp> > #include <boost/property_tree/xml_parser.hpp> After adding these lines, I compiled my modified application using g++ 4.6.3 on Ubuntu 12.04. I get the following errors: g++ -c -Wall -Werror -I../cudd-2.4.2//include/ -I /home/pramod/libraries/boost_1_50_0/ -O2 -Wno-unused-result -Wno-unused-function -c -o main.o main.cpp In file included from /home/pramod/libraries/boost_1_50_0/boost/property_tree/ptree.hpp:17:0, from main.h:10, from main.cpp:17: /home/pramod/libraries/boost_1_50_0/boost/property_tree/stream_translator.hpp: In static member function ‘static void boost::property_tree::customize_stream<Ch, Traits, bool, void>::extract(std::basic_istream<_CharT, _Traits>&, bool&)’: /home/pramod/libraries/boost_1_50_0/boost/property_tree/stream_translator.hpp:117:18: error: expected unqualified-id before ‘{’ token /home/pramod/libraries/boost_1_50_0/boost/property_tree/stream_translator.hpp:117:18: error: expected ‘)’ before ‘{’ token /home/pramod/libraries/boost_1_50_0/boost/property_tree/stream_translator.hpp: In member function ‘boost::optional<E> boost::property_tree::stream_translator<Ch, Traits, Alloc, E>::get_value(const internal_type&)’: /home/pramod/libraries/boost_1_50_0/boost/property_tree/stream_translator.hpp:191:20: error: expected unqualified-id before ‘{’ token /home/pramod/libraries/boost_1_50_0/boost/property_tree/stream_translator.hpp:191:20: error: expected ‘)’ before ‘{’ token make: *** [main.o] Error 1 When I look the lines117 and 191 in ptree.hpp, they are the following: s >> e; if(s.fail()) { // Try again in word form. and customized::extract(iss, e); if(iss.fail() || iss.bad() || iss.get() != Traits::eof()) { return boost::optional<E>(); I can't spot anything obviously wrong with either of these lines. Does anyone have any clues on what could be going wrong? Thanks! Pramod

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Anyone following boost as a git submodule?
by Chris Cleeland 28 Jun '12

28 Jun '12

Is anyone tracking boost for their project(s) as a git submodule by chance? What we've done up 'til now is import a particular boost rev directly into our repo (actually an SVN repo) but that is sub-optimal for various reasons. We're in the process of transitioning to git, so using a git submodule becomes a possibility. Wondering if anybody is doing that and, if so, if they'd be willing to discuss their experience either on list or privately. -- Chris Cleeland

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[Interprocess] Unable to Access More than 7 GB of Memory
by Hering Cheng 27 Jun '12

27 Jun '12

Hi, Using Boost.Interprocess, with either unmanaged or managed shared memory, I am unable to access beyond 7 GB of the 20 GB of memory I allocated, despite the fact that none of the Interprocess API calls returned any error or threw any exception. I run into segmentation fault when I actually try to access the portion of the memory above the (approximately) 7 GB limit. If I perform a similar test with shared memory constructed via manual calls to System V IPC, then I can access all of the 20 GB of memory without any problem. I suspect this may be due to mmap() (using by Interprocess along with POSIX shm_open() and other calls) but I have been unable to verify. Does anyone have any experience on this? The machine is running RedHat 5 with 16 GB of RAM. (Yes, when I go through the 20 GB of memory a lot of paging/swapping occurred.) From below, I do not think that the problem was due to configuration. $ uname -a Linux NJ-CEL01 2.6.18-164.11.1.el5 #1 SMP Wed Jan 6 13:26:04 EST 2010 x86_64 x86_64 x86_64 GNU/Linux $ ulimit -a core file size (blocks, -c) 2147483648 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 141312 max locked memory (kbytes, -l) 32 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 10240 cpu time (seconds, -t) unlimited max user processes (-u) 141312 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited $ grep . /proc/sys/kernel/shm* /proc/sys/kernel/shmall:4294967296 /proc/sys/kernel/shmmax:68719476736 /proc/sys/kernel/shmmni:4096 $ getconf PAGE_SIZE 4096 The following is the code for the test cases. struct entry_t { uint64_t f[10]; }; BOOST_FIXTURE_TEST_CASE(sysv_ipc, fixture) { std::cout << "System V IPC shared memory" << std::endl; const std::string shm_key = "/proc/sys/kernel/shmall"; const std::size_t shm_size = 20L * 1024L * 1024L * 1024L; const key_t ipc_key = ftok(shm_key.c_str(), 0); const int rm_rc = shmctl(ipc_key, IPC_RMID, NULL); if (rm_rc < 0) { std::cerr << "Unable to remove shared memory: " << strerror(errno) << std::endl; } const int shm_id = shmget(ipc_key, shm_size, 0644 | IPC_CREAT | IPC_EXCL); BOOST_ASSERT_MSG(shm_id >= 0, strerror(errno)); void * const shm_addr = shmat(shm_id, NULL, 0); BOOST_ASSERT_MSG(shm_addr != reinterpret_cast<void *>(-1), strerror(errno)); const std::size_t entry_count = 90L * (shm_size / sizeof(entry_t)) / 100L; entry_t * array = reinterpret_cast<entry_t *>(shm_addr); std::cout << "Initializing " << entry_count << " entries..." << std::endl; for (std::size_t i = 0; i < entry_count; ++i) { entry_t & entry = array[i]; void * addr = & entry; new (addr) entry_t(); if (i % 1000000 == 0) { std::cout << i << std::endl; } } std::cout << "Initialized all entries" << std::endl; shmctl(ipc_key, IPC_RMID, NULL); } BOOST_FIXTURE_TEST_CASE(unmanaged, fixture) { std::cout << "Unmanaged shared memory" << std::endl; const std::string shm_key = "test"; const std::size_t shm_size = 20L * 1024L * 1024L * 1024L; bipc::shared_memory_object::remove(shm_key.c_str()); bipc::shared_memory_object shm_obj(bipc::create_only, shm_key.c_str(), bipc::mode_t::read_write, bipc::permissions(0666)); shm_obj.truncate(shm_size); bipc::mapped_region region(shm_obj, bipc::read_write); const std::size_t entry_count = 90L * (shm_size / sizeof(entry_t)) / 100L; entry_t * array = reinterpret_cast<entry_t *>(region.get_address()); for (std::size_t i = 0; i < entry_count; ++i) { entry_t & entry = array[i]; void * addr = & entry; new (addr) entry_t(); if (i % 1000000 == 0) { std::cout << i << std::endl; } } bipc::shared_memory_object::remove(shm_key.c_str()); } BOOST_FIXTURE_TEST_CASE(managed, fixture) { std::cout << "Managed shared memory" << std::endl; const std::string shm_key = "test"; const std::size_t shm_size = 20L * 1024L * 1024L * 1024L; bipc::shared_memory_object::remove(shm_key.c_str()); bipc::managed_shared_memory shm(bipc::create_only, shm_key.c_str(), shm_size); typedef bipc::managed_shared_memory::allocator<entry_t>::type allocator_t; allocator_t array_alloc(shm.get_segment_manager()); const std::size_t entry_count = 90L * (shm_size / sizeof(entry_t)) / 100L; allocator_t::pointer array_ptr = array_alloc.allocate(entry_count); entry_t * array = array_ptr.get(); for (std::size_t i = 0; i < entry_count; ++i) { entry_t & entry = array[i]; void * addr = & entry; new (addr) entry_t(); if (i % 1000000 == 0) { std::cout << i << std::endl; } } bipc::shared_memory_object::remove(shm_key.c_str()); } Thanks. Hering

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Meeting C++ - Call for Papers
by Jens Weller 27 Jun '12

27 Jun '12

Dear C++/boost community! I'm proud to announce the call for papers for the Meeting C++ conference! After having talked to some people in Aspen about the plans for a C++ conference in Germany, I've decided to give it a try. Meeting C++ will take place in November in Germany, as a 2 Day C++ conference. We are looking for speakers and possible talks at our conference in fall! Possible topics could include: * (modern) C++ * C++11 * boost * C++ Frameworks like Qt, wxWidgets, Ogre, ... * other C++ related topics You'll find more information and updates at the webpage http://meetingcpp.com Tickets will be available from July at our website. regards, Jens Weller -- NEU: FreePhone 3-fach-Flat mit kostenlosem Smartphone! Jetzt informieren: http://mobile.1und1.de/?ac=OM.PW.PW003K20328T7073a

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boost asio crash
by 陈海峰 27 Jun '12

27 Jun '12

quote_server[5071] general protection rip:904f96 rsp:2aaacd41fe70 error:0 [root@linuxdev quoteserver]# addr2line -e quote_server 904f96 /usr/local/boost_1_49_0/include/boost/asio/detail/epoll_reactor.hpp:111

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boost asio crash, how to solve
by 陈海峰 27 Jun '12

27 Jun '12

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