////////////////////////////////////////////////////////////////////////////// // // (C) Copyright Ion Gaztanaga 2006-2009. Distributed under the Boost // Software License, Version 1.0. (See accompanying file // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) // // See http://www.boost.org/libs/interprocess for documentation. // ////////////////////////////////////////////////////////////////////////////// #include <boost/interprocess/detail/config_begin.hpp> //[doc_managed_external_buffer #include <boost/interprocess/managed_external_buffer.hpp> #include <boost/interprocess/allocators/allocator.hpp> #include <boost/interprocess/containers/list.hpp> #include <cstring> #include <boost/aligned_storage.hpp> int main() { using namespace boost::interprocess; //Create the static memory who will store all objects const int memsize = 65536; static boost::aligned_storage<memsize>::type static_buffer; //This managed memory will construct objects associated with //a wide string in the static buffer wmanaged_external_buffer objects_in_static_memory (create_only, &static_buffer, memsize); //We optimize resources to create 100 named objects in the static buffer objects_in_static_memory.reserve_named_objects(100); //Alias an integer node allocator type //This allocator will allocate memory inside the static buffer typedef allocator<int, wmanaged_external_buffer::segment_manager> allocator_t; //Alias a STL compatible list to be constructed in the static buffer typedef list<int, allocator_t> MyBufferList; //The list must be initialized with the allocator //All objects created with objects_in_static_memory will //be stored in the static_buffer! MyBufferList *list = objects_in_static_memory.construct<MyBufferList>(L"MyList") (objects_in_static_memory.get_segment_manager()); //<- (void)list; //-> //Since the allocation algorithm from wmanaged_external_buffer uses relative //pointers and all the pointers constructed int the static memory point //to objects in the same segment, we can create another static buffer //from the first one and duplicate all the data. static boost::aligned_storage<memsize>::type static_buffer2; std::memcpy(&static_buffer2, &static_buffer, memsize); //Now open the duplicated managed memory passing the memory as argument wmanaged_external_buffer objects_in_static_memory2 (open_only, &static_buffer2, memsize); //Check that "MyList" has been duplicated in the second buffer if(!objects_in_static_memory2.find<MyBufferList>(L"MyList").first) return 1; //Destroy the lists from the static buffers objects_in_static_memory.destroy<MyBufferList>(L"MyList"); objects_in_static_memory2.destroy<MyBufferList>(L"MyList"); return 0; } //] #include <boost/interprocess/detail/config_end.hpp>