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GeezerVison is showing github.com — interprocess/example/doc_allocator.cpp at develop · boostorg/interprocess

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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_allocator
#include <boost/interprocess/managed_shared_memory.hpp>
#include <boost/interprocess/allocators/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(), 65536);
//Create an allocator that allocates ints from the managed segment
allocator<int, managed_shared_memory::segment_manager>
allocator_instance(segment.get_segment_manager());
//Copy constructed allocator is equal
allocator<int, managed_shared_memory::segment_manager>
allocator_instance2(allocator_instance);
assert(allocator_instance2 == allocator_instance);
//Allocate and deallocate memory for 100 ints
allocator_instance2.deallocate(allocator_instance.allocate(100), 100);
return 0;
}
//]
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