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70 lines
2.2 KiB
C++
70 lines
2.2 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/allocators/allocator.hpp>
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#include <boost/interprocess/managed_shared_memory.hpp>
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#include <boost/interprocess/sync/named_semaphore.hpp>
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#include "printcontainer.hpp"
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#include <vector>
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#include <algorithm>
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using namespace boost::interprocess;
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int main ()
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{
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//Shared memory attributes
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const char *const shMemName = "MySharedMemory";
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const void *const map_addr = reinterpret_cast<const void*>(0x30000000);
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//Create sems for synchronization
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named_semaphore semA(open_or_create, "processAsem", 1);
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named_semaphore semB(open_or_create, "processBsem", 1);
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//Wait until the shared memory is ready
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semB.wait();
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//Create shared memory
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fixed_managed_shared_memory segment(open_only, shMemName, map_addr);
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//STL compatible allocator object, uses allocate(), deallocate() functions
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typedef allocator<int,fixed_managed_shared_memory::segment_manager>
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shmem_allocator_int_t;
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//This is the shared memory vector type
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typedef std::vector<int, shmem_allocator_int_t > MyVect;
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//Finding vector in shared memory and printing contents
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std::cout << "Connecting to object ShmVect\n\n";
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MyVect *shmem_vect = segment.find<MyVect>("ShmVect").first;
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PrintContents(*shmem_vect, "ShmVect");
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//Reverse sorting the vector with std::sort
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std::cout << "Reverse sorting ShmVect\n\n";
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std::sort(shmem_vect->rbegin(), shmem_vect->rend());
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//Printing values after sorting
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std::cout << "Sorting complete\n\n";
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PrintContents(*shmem_vect, "ShmVect");
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//Waking up process A
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std::cout << "Waking up processA\n\n";
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semA.post();
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//We're done, closing shared memory
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std::cout << "Closing shmem segment\n\n";
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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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