| ////////////////////////////////////////////////////////////////////////////// |
| // |
| // (C) Copyright Ion Gaztanaga 2006-2009. 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; |
| |
| //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> |