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67 lines
2.2 KiB
C++
67 lines
2.2 KiB
C++
//////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2006-2012.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/interprocess for documentation.
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//
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//////////////////////////////////////////////////////////////////////////////
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#include <boost/interprocess/detail/workaround.hpp>
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//[doc_shared_ptr_explicit
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#include <boost/interprocess/managed_shared_memory.hpp>
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#include <boost/interprocess/smart_ptr/shared_ptr.hpp>
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#include <boost/interprocess/allocators/allocator.hpp>
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#include <boost/interprocess/smart_ptr/deleter.hpp>
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#include <cassert>
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//<-
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#include "../test/get_process_id_name.hpp"
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//->
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using namespace boost::interprocess;
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//This is type of the object we want to share
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class MyType
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{};
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typedef managed_shared_memory::segment_manager segment_manager_type;
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typedef allocator<void, segment_manager_type> void_allocator_type;
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typedef deleter<MyType, segment_manager_type> deleter_type;
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typedef shared_ptr<MyType, void_allocator_type, deleter_type> my_shared_ptr;
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int main ()
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{
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//Remove shared memory on construction and destruction
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struct shm_remove
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{
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shm_remove() { shared_memory_object::remove(test::get_process_id_name()); }
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~shm_remove(){ shared_memory_object::remove(test::get_process_id_name()); }
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} remover;
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//<-
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(void)remover;
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//->
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managed_shared_memory segment(create_only, test::get_process_id_name(), 4096);
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//Create a shared pointer in shared memory
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//pointing to a newly created object in the segment
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my_shared_ptr &shared_ptr_instance =
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*segment.construct<my_shared_ptr>("shared ptr")
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//Arguments to construct the shared pointer
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( segment.construct<MyType>("object to share")() //object to own
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, void_allocator_type(segment.get_segment_manager()) //allocator
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, deleter_type(segment.get_segment_manager()) //deleter
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);
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assert(shared_ptr_instance.use_count() == 1);
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//Destroy "shared ptr". "object to share" will be automatically destroyed
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segment.destroy_ptr(&shared_ptr_instance);
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return 0;
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}
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//]
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