{

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

#endif

//->

} remover;

//<-

(void)remover;

//->

//Shared memory front-end that is able to construct objects

//associated with a c-string. Erase previous shared memory with the name

//to be used and create the memory segment at the specified address and initialize resources

//<-

#if 1

managed_shared_memory segment(create_only,test::get_process_id_name(), 65536);

#else

#endif

//->

//Note that 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;

//Alias an STL compatible allocator of for the map.

//This allocator will allow to place containers

//in managed shared memory segments

typedef allocator<ValueType, managed_shared_memory::segment_manager>

ShmemAllocator;

//Alias a map of ints that uses the previous STL-like allocator.

//Note that the third parameter argument is the ordering function

//of the map, just like with std::map, used to compare the keys.

typedef map<KeyType, MappedType, std::less<KeyType>, ShmemAllocator> MyMap;

//Initialize the shared memory STL-compatible allocator

ShmemAllocator alloc_inst (segment.get_segment_manager());

//Construct a shared memory map.

//Note that the first parameter is the comparison function,

//and the second one the allocator.

//This the same signature as std::map's constructor taking an allocator

MyMap *mymap =

segment.construct<MyMap>("MyMap") //object name

(std::less<int>() //first ctor parameter

,alloc_inst); //second ctor parameter

//Insert data in the map

for(int i = 0; i < 100; ++i){

mymap->insert(std::pair<const int, float>(i, (float)i));

}

return 0;