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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/workaround.hpp>

//[doc_shared_ptr_explicit

#include <boost/interprocess/managed_shared_memory.hpp>

#include <boost/interprocess/smart_ptr/shared_ptr.hpp>

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

#include <boost/interprocess/smart_ptr/deleter.hpp>

#include <cassert>

//<-

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

//->

using namespace boost::interprocess;

//This is type of the object we want to share

class MyType

{};

typedef managed_shared_memory::segment_manager segment_manager_type;

typedef allocator<void, segment_manager_type> void_allocator_type;

typedef deleter<MyType, segment_manager_type> deleter_type;

typedef shared_ptr<MyType, void_allocator_type, deleter_type> my_shared_ptr;

int main ()

{

//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;

//->

//<-

#if 1

managed_shared_memory segment(create_only, test::get_process_id_name(), 4096);

#else

//->

managed_shared_memory segment(create_only, "MySharedMemory", 4096);

//<-

#endif

//->

//Create a shared pointer in shared memory

//pointing to a newly created object in the segment

my_shared_ptr &shared_ptr_instance =

*segment.construct<my_shared_ptr>("shared ptr")

//Arguments to construct the shared pointer

( segment.construct<MyType>("object to share")() //object to own

, void_allocator_type(segment.get_segment_manager()) //allocator

, deleter_type(segment.get_segment_manager()) //deleter

);

assert(shared_ptr_instance.use_count() == 1);

//Destroy "shared ptr". "object to share" will be automatically destroyed

segment.destroy_ptr(&shared_ptr_instance);

return 0;

}

//]

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