////////////////////////////////////////////////////////////////////////////// // // (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> #include <boost/interprocess/detail/workaround.hpp> //[doc_unordered_map #include <boost/interprocess/managed_shared_memory.hpp> #include <boost/interprocess/allocators/allocator.hpp> #include <boost/unordered_map.hpp> //boost::unordered_map #include <functional> //std::equal_to #include <boost/functional/hash.hpp> //boost::hash //<- #include "../test/get_process_id_name.hpp" //-> int main () { using namespace boost::interprocess; //Remove shared memory on construction and destruction struct shm_remove { //<- #if 1 shm_remove() { shared_memory_object::remove(test::get_process_id_name()); } ~shm_remove(){ shared_memory_object::remove(test::get_process_id_name()); } #else //-> shm_remove() { shared_memory_object::remove("MySharedMemory"); } ~shm_remove(){ shared_memory_object::remove("MySharedMemory"); } //<- #endif //-> } remover; //Create shared memory //<- #if 1 managed_shared_memory segment(create_only, test::get_process_id_name(), 65536); #else //-> managed_shared_memory segment(create_only, "MySharedMemory", 65536); //<- #endif //-> //Note that unordered_map<Key, MappedType>'s value_type is std::pair<const Key, MappedType>, //so the allocator must allocate that pair. typedef int KeyType; typedef float MappedType; typedef std::pair<const int, float> ValueType; //Typedef the allocator typedef allocator<ValueType, managed_shared_memory::segment_manager> ShmemAllocator; //Alias an unordered_map of ints that uses the previous STL-like allocator. typedef boost::unordered_map < KeyType , MappedType , boost::hash<KeyType> ,std::equal_to<KeyType> , ShmemAllocator> MyHashMap; //Construct a shared memory hash map. //Note that the first parameter is the initial bucket count and //after that, the hash function, the equality function and the allocator MyHashMap *myhashmap = segment.construct<MyHashMap>("MyHashMap") //object name ( 3, boost::hash<int>(), std::equal_to<int>() // , segment.get_allocator<ValueType>()); //allocator instance //Insert data in the hash map for(int i = 0; i < 100; ++i){ myhashmap->insert(ValueType(i, (float)i)); } return 0; } //] #include <boost/interprocess/detail/config_end.hpp>