doc_managed_construction_info.cpp

来自「Boost provides free peer-reviewed portab」· C++ 代码 · 共 63 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>
//[doc_managed_construction_info
#include <boost/interprocess/managed_shared_memory.hpp>
#include <cassert>
#include <cstring>

class my_class
{
   //...
};

int main()
{
   using namespace boost::interprocess;
   typedef managed_shared_memory msm;
   shared_memory_object::remove("MyManagedShm");

   try{
      msm managed_shm(create_only, "MyManagedShm", 10000*sizeof(std::size_t));

      //Construct objects
      my_class *named_object  = managed_shm.construct<my_class>("Object name")[1]();
      my_class *unique_object = managed_shm.construct<my_class>(unique_instance)[2]();
      my_class *anon_object   = managed_shm.construct<my_class>(anonymous_instance)[3]();

      //Now test "get_instance_name" function.
      assert(0 == std::strcmp(msm::get_instance_name(named_object), "Object name"));
      assert(0 == msm::get_instance_name(unique_object));
      assert(0 == msm::get_instance_name(anon_object));

      //Now test "get_instance_type" function.
      assert(named_type     == msm::get_instance_type(named_object));
      assert(unique_type    == msm::get_instance_type(unique_object));
      assert(anonymous_type == msm::get_instance_type(anon_object));

      //Now test "get_instance_length" function.
      assert(1 == msm::get_instance_length(named_object));
      assert(2 == msm::get_instance_length(unique_object));
      assert(3 == msm::get_instance_length(anon_object));

      managed_shm.destroy_ptr(named_object);
      managed_shm.destroy_ptr(unique_object);
      managed_shm.destroy_ptr(anon_object);
   }
   catch(...){
      shared_memory_object::remove("MyManagedShm");
      throw;
   }
   shared_memory_object::remove("MyManagedShm");
   return 0;
}
//]
#include <boost/interprocess/detail/config_end.hpp>