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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.

//////////////////////////////////////////////////////////////////////////////

#ifdef NDEBUG

#undef NDEBUG

#endif

#include <boost/interprocess/detail/workaround.hpp>

//[doc_node_allocator

#include <boost/interprocess/managed_shared_memory.hpp>

#include <boost/interprocess/allocators/node_allocator.hpp>

#include <cassert>

//<-

#include "../test/get_process_id_name.hpp"

//->

using namespace boost::interprocess;

int main ()

{

//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;

//->

//Create shared memory

managed_shared_memory segment(create_only,

test::get_process_id_name(), //segment name

65536);

//Create a node_allocator that allocates ints from the managed segment

//The number of chunks per segment is the default value

typedef node_allocator<int, managed_shared_memory::segment_manager>

node_allocator_t;

node_allocator_t allocator_instance(segment.get_segment_manager());

//Create another node_allocator. Since the segment manager address

//is the same, this node_allocator will be

//attached to the same pool so "allocator_instance2" can deallocate

//nodes allocated by "allocator_instance"

node_allocator_t allocator_instance2(segment.get_segment_manager());

//Create another node_allocator using copy-constructor. This

//node_allocator will also be attached to the same pool

node_allocator_t allocator_instance3(allocator_instance2);

//All allocators are equal

assert(allocator_instance == allocator_instance2);

assert(allocator_instance2 == allocator_instance3);

//So memory allocated with one can be deallocated with another

allocator_instance2.deallocate(allocator_instance.allocate(1), 1);

allocator_instance3.deallocate(allocator_instance2.allocate(1), 1);

//The common pool will be destroyed here, since no allocator is

//attached to the pool

return 0;

}

//]