doc_contb.cpp

来自「Boost provides free peer-reviewed portab」· C++ 代码 · 共 58 行

//////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2006-2007. 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_contB
#include <boost/interprocess/managed_shared_memory.hpp>
#include <boost/interprocess/containers/vector.hpp>
#include <boost/interprocess/allocators/allocator.hpp>
#include <algorithm>

int main ()
{
   using namespace boost::interprocess;
   try{
      //A special shared memory where we can
      //construct objects associated with a name.
      //Connect to the already created shared memory segment
      //and initialize needed resources
      managed_shared_memory segment
         (open_only 
         ,"MySharedMemory");  //segment name

      //Alias an STL compatible allocator of ints that allocates ints from the managed
      //shared memory segment.  This allocator will allow to place containers
      //in managed shared memory segments
      typedef allocator<int, managed_shared_memory::segment_manager> 
         ShmemAllocator;

      //Alias a vector that uses the previous STL-like allocator
      typedef vector<int, ShmemAllocator> MyVector;

      //Find the vector using the c-string name
      MyVector *myvector = segment.find<MyVector>("MyVector").first;

      //Use vector in reverse order
      std::sort(myvector->rbegin(), myvector->rend());
      // . . .

      //When done, destroy the vector from the segment
      segment.destroy<MyVector>("MyVector");
   }
   catch(...){
      shared_memory_object::remove("MySharedMemory");
      throw;
   }
   shared_memory_object::remove("MySharedMemory");
   return 0;
}
//]
#include <boost/interprocess/detail/config_end.hpp>