Po-Chun wrote:
I am a new user and try to write some codes with shared memory using boost.interprocess. Basically, I followed the examples and the allocation seems fine. But the use of shared-memory container gave me a bunch of error messages related to "instantiated from here." during compile. The error seems related to the template. But I have no idea how to fix it yet. Any suggestion would be helpful. Thanks.
set's constructor is equal to std::constructor, but you must pay more attention because it needs an allocator and set's constructor taking the allocator takes also the comparison option. You have several C++ errors in your code (set's template arguments are not correct, for example). This should compile fine: #include <boost/interprocess/managed_shared_memory.hpp> #include <boost/interprocess/containers/set.hpp> #include <boost/cstdint.hpp> #include <boost/interprocess/allocators/allocator.hpp> #include <functional> #include <utility> struct LongIntLess { bool operator()(const boost::uint64_t a, const boost::uint64_t b) const { return a < b; } }; int main () { using namespace boost::interprocess; try{ shared_memory_object::remove("SharedMemory"); managed_shared_memory segment (create_only, "SharedMemory", sizeof(boost::uint64_t)*200); typedef allocator< boost::uint64_t, managed_shared_memory::segment_manager> shmAllocator_t; typedef set<boost::uint64_t, LongIntLess, shmAllocator_t> shrSet_t; const shmAllocator_t alloc_inst (segment.get_segment_manager()); shrSet_t *WrSet_1; WrSet_1 = segment.construct<shrSet_t> ("shrSet_t") (LongIntLess(), alloc_inst); WrSet_1->insert(2); } catch (...){ shared_memory_object::remove("SharedMemory"); throw; } shared_memory_object::remove("SharedMemory"); } Ion