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97 lines
3.0 KiB
C++
97 lines
3.0 KiB
C++
//////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztañaga 2004-2006. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at 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/config_begin.hpp>
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#include <boost/interprocess/detail/workaround.hpp>
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#include <boost/interprocess/managed_shared_memory.hpp>
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#include <cstddef>
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int main ()
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{
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using namespace boost::interprocess;
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typedef std::pair<double, int> MyType;
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//Named allocate capable shared mem allocator
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//Create shared memory
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shared_memory_object::remove("MySharedMemory");
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managed_shared_memory segment
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(create_only,
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"MySharedMemory",//segment name
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65536); //segment size in bytes
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//Create an object of MyType initialized to {0, 0}
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segment.construct<MyType>
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("MyType instance") /*name of the object*/
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(0 /*ctor first argument*/,
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0 /*ctor second argument*/);
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//Create an array of 10 elements of MyType initialized to {0, 0}
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segment.construct<MyType>
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("MyType array") /*name of the object*/
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[10] /*number of elements*/
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(0 /*ctor first argument*/,
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0 /*ctor second argument*/);
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//Let's simulate other process
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{
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using namespace boost::interprocess;
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typedef std::pair<double, int> MyType;
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//Named allocate capable shared mem allocator
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//Create shared memory
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managed_shared_memory segment
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(open_only, "MySharedMemory"); //segment name
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//Find the array and object
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std::pair<MyType*, std::size_t> res;
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res = segment.find<MyType> ("MyType array");
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std::size_t array_len = res.second;
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//Length should be 1
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assert(array_len == 10);
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//Find the array and the object
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res = segment.find<MyType> ("MyType instance");
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std::size_t len = res.second;
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//Length should be 1
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assert(len == 1);
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//Change data
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// . . .
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//We're done, delete array from memory
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segment.destroy<MyType>("MyType array");
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//We're done, delete object from memory
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segment.destroy<MyType>("MyType instance");
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}
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MyType *anonymous = segment.construct<MyType>(anonymous_instance)
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[10] //number of elements
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(1, //ctor first argument
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1); //ctor second argument
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segment.destroy_ptr(anonymous);
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segment.construct<MyType>(unique_instance)
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[10] //number of elements
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(1, //ctor first argument
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1); //ctor second argument
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std::pair<MyType *,std::size_t> ret = segment.find<MyType>(unique_instance);
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segment.destroy<MyType>(unique_instance);
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return 0;
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}
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#include <boost/interprocess/detail/config_end.hpp>
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