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Diffstat (limited to 'src/boost/libs/interprocess/example/doc_adaptive_pool.cpp')
-rw-r--r-- | src/boost/libs/interprocess/example/doc_adaptive_pool.cpp | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/src/boost/libs/interprocess/example/doc_adaptive_pool.cpp b/src/boost/libs/interprocess/example/doc_adaptive_pool.cpp new file mode 100644 index 00000000..9236ae20 --- /dev/null +++ b/src/boost/libs/interprocess/example/doc_adaptive_pool.cpp @@ -0,0 +1,85 @@ +////////////////////////////////////////////////////////////////////////////// +// +// (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_adaptive_pool +#include <boost/interprocess/managed_shared_memory.hpp> +#include <boost/interprocess/allocators/adaptive_pool.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(), 65536); + #else + //-> + managed_shared_memory segment(create_only, + "MySharedMemory", //segment name + 65536); + //<- + #endif + //-> + + //Create a adaptive_pool that allocates ints from the managed segment + //The number of chunks per segment is the default value + typedef adaptive_pool<int, managed_shared_memory::segment_manager> + adaptive_pool_t; + adaptive_pool_t allocator_instance(segment.get_segment_manager()); + + //Create another adaptive_pool. Since the segment manager address + //is the same, this adaptive_pool will be + //attached to the same pool so "allocator_instance2" can deallocate + //nodes allocated by "allocator_instance" + adaptive_pool_t allocator_instance2(segment.get_segment_manager()); + + //Create another adaptive_pool using copy-constructor. This + //adaptive_pool will also be attached to the same pool + adaptive_pool_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> |