[Boost-users] about shared_ptr and object_pool

From: Ken zhang (kennir_at_[hidden])
Date: 2008-07-30 07:54:55

Hi dear all.

    I have a class named "session" look like below code:
    class session : public boost::enable_shared_from_this< session >,
private boost::noncopyable
    {
    public:
      session(boost::asio::io_service& io_service);
     .....
    };

   I want use boost::object_pool for allocate memory for session.

   class host
   {
   public:
     typedef boost::object_pool<session> session_pool;

      host()
      : new_session_( session_pool_.construct(),
boost::bind(&session_pool::destroy, &session_pool_))
      {
      }

   public:
      boost::shared_ptr< session > new_session_;

      session_pool session_pool_;

   };

  but there has a compiler error was occured:

1> d:\development\boost_1_35_0\boost\bind.hpp(1613) : warning C4180:
qualifier applied to function type has no meaning; ignored
1>        d:\development\boost_1_35_0\boost\bind.hpp(1647) : see reference
to class template instantiation 'boost::_bi::add_cref<Pm,I>' being compiled
1>        with
1>        [
1>            Pm=void (__thiscall boost::object_pool<session>::* )(session
*),
1>            I=1
1>        ]
1>        d:\development\coreframework\portal\src\portal_server.cpp(16) :
see reference to class template instantiation 'boost::_bi::dm_result<Pm,A1>'
being compiled
1>        with
1>        [
1>            Pm=void (__thiscall boost::object_pool<session>::* )(session
*),
1>            A1=portal_server::session_pool *__w64
1>        ]
1>d:\development\boost_1_35_0\boost\mem_fn.hpp(318) : warning C4180:
qualifier applied to function type has no meaning; ignored
1>        d:\development\boost_1_35_0\boost\bind\bind_template.hpp(344) :
see reference to class template instantiation 'boost::_mfi::dm<R,T>' being
compiled
1>        with
1>        [
1>            R=void (session *),
1>            T=boost::object_pool<session>
1>        ]
1>Project : error PRJ0002 : Error result 1 returned from 'C:\Program
Files\Microsoft Visual Studio 8\VC\bin\cl.exe'.

   I use Microsoft visual studio 8 (vs2005).

Thanks all

Best regards.

Yours Kenneth.Sh