doc_ipc_messageb.cpp

来自「Boost provides free peer-reviewed portab」· C++ 代码 · 共 48 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_ipc_messageB
#include <boost/interprocess/managed_shared_memory.hpp>

int main ()
{
   using namespace boost::interprocess;

   try{
      //A special shared memory from which we are
      //able to allocate raw memory buffers.
      //Connect to the already created shared memory segment
      //and initialize needed resources
      managed_shared_memory segment(open_only, "MySharedMemory");  //segment name

      //An handle from the base address can identify any byte of the shared 
      //memory segment even if it is mapped in different base addresses
      managed_shared_memory::handle_t handle = 0;

      //Wait handle msg from the other process and put it in
      //"handle" local variable
      //Get buffer local address from handle
      void *msg = segment.get_address_from_handle(handle);
      (void)msg;
      //Do anything with msg
      //. . .
      //Send ack to sender process
   }
   catch(...){
      shared_memory_object::remove("MySharedMemory");
      throw;
   }
   shared_memory_object::remove("MySharedMemory");
   return 0;
}
//]
#include <boost/interprocess/detail/config_end.hpp>