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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/config_begin.hpp>
- #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
- {
- //<-
- #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;
- //->
- //Create shared memory
- //<-
- #if 1
- managed_shared_memory segment(create_only,
- test::get_process_id_name(), //segment name
- 65536);
- #else
- //->
- managed_shared_memory segment(create_only,
- "MySharedMemory", //segment name
- 65536);
- //<-
- #endif
- //->
- //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;
- }
- //]
- #include <boost/interprocess/detail/config_end.hpp>
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