{

private:

//A typedef to save typing

typedef managed_shared_memory::segment_manager segment_manager;

//This my_deleter is created in the stack, not in shared memory,

//so we can use raw pointers

segment_manager *mp_segment_manager;

public:

//This typedef will specify the pointer type that

//scoped_ptr will store

typedef T *pointer;

//Constructor

my_deleter(segment_manager *s_mngr)

: mp_segment_manager(s_mngr){}

void operator()(pointer object_to_delete)

{ mp_segment_manager->destroy_ptr(object_to_delete); }

{

//Create shared memory

//Remove shared memory on construction and destruction

struct shm_remove

{

shm_remove() { shared_memory_object::remove(test::get_process_id_name()); }

~shm_remove(){ shared_memory_object::remove(test::get_process_id_name()); }

} remover;

//<-

(void)remover;

//->

managed_shared_memory shmem(create_only, test::get_process_id_name(), 10000);

//In the first try, there will be no exceptions

//in the second try we will throw an exception

for(int i = 0; i < 2; ++i){

//Create an object in shared memory

my_class * my_object = shmem.construct<my_class>("my_object")();

my_class * my_object2 = shmem.construct<my_class>(anonymous_instance)();

shmem.destroy_ptr(my_object2);

//Since the next shared memory allocation can throw

//assign it to a scoped_ptr so that if an exception occurs

//we destroy the object automatically

my_deleter<my_class> d(shmem.get_segment_manager());

BOOST_INTERPROCESS_TRY{

scoped_ptr<my_class, my_deleter<my_class> > s_ptr(my_object, d);

//Let's emulate a exception capable operation

//In the second try, throw an exception

if(i == 1){

throw(my_exception());

}

//If we have passed the dangerous zone

//we can release the scoped pointer

//to avoid destruction

s_ptr.release();

}

BOOST_INTERPROCESS_CATCH(const my_exception &){} BOOST_INTERPROCESS_CATCH_END

//Here, scoped_ptr is destroyed

//so it we haven't thrown an exception

//the object should be there, otherwise, destroyed

if(i == 0){

//Make sure the object is alive

if(!shmem.find<my_class>("my_object").first){

return 1;

}

//Now we can use it and delete it manually

shmem.destroy<my_class>("my_object");

}

else{

//Make sure the object has been deleted

if(shmem.find<my_class>("my_object").first){

return 1;