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- //////////////////////////////////////////////////////////////////////////////
- //
- // (C) Copyright Ion Gaztanaga 2006-2012. 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>
- //<-
- //Shield against external warnings
- #include <boost/interprocess/detail/config_external_begin.hpp>
- //->
- #include <boost/unordered_map.hpp> //boost::unordered_map
- //<-
- #include <boost/interprocess/detail/config_external_end.hpp>
- #include "../test/get_process_id_name.hpp"
- //->
- #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;
- //<-
- (void)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>
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