doc_cont.cpp

来自「Boost provides free peer-reviewed portab」· C++ 代码 · 共 66 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_cont
#include <boost/interprocess/containers/vector.hpp>
#include <boost/interprocess/allocators/allocator.hpp>
#include <boost/interprocess/managed_shared_memory.hpp>

int main ()
{
   using namespace boost::interprocess;
   shared_memory_object::remove("MySharedMemory");
   try{
      //A managed shared memory where we can construct objects
      //associated with a c-string
      managed_shared_memory segment(create_only,
                                    "MySharedMemory",  //segment name
                                    65536);

      //Alias an STL-like allocator of ints that allocates ints from the segment
      typedef allocator<int, managed_shared_memory::segment_manager> 
         ShmemAllocator;

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

      int initVal[]        = {0, 1, 2, 3, 4, 5, 6 };
      const int *begVal    = initVal;
      const int *endVal    = initVal + sizeof(initVal)/sizeof(initVal[0]);

      //Initialize the STL-like allocator
      const ShmemAllocator alloc_inst (segment.get_segment_manager());

      //Construct the vector in the shared memory segment with the STL-like allocator 
      //from a range of iterators
      MyVector *myvector = 
         segment.construct<MyVector>
            ("MyVector")/*object name*/
            (begVal     /*first ctor parameter*/,
            endVal     /*second ctor parameter*/, 
            alloc_inst /*third ctor parameter*/); 

      //Use vector as your want
      std::sort(myvector->rbegin(), myvector->rend());
      // . . .
      //When done, destroy and delete 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>