[ciao-users] [CIAO] [questions on lack of _duplicate in a component's auto-generated reactor() method, etc...]

[King, Perry (ES)]

    CIAO VERSION: 1.3.2
    TAO VERSION : 2.3.2
    ACE VERSION : 6.3.2

    HOST MACHINE and OPERATING SYSTEM:
        Intel core I7 4-core Ivy bridge based PC, Centos 6.5
        If on Windows based OS's, which version of WINSOCK do you
        use?: N/A

    TARGET MACHINE and OPERATING SYSTEM, if different from HOST:
    COMPILER NAME AND VERSION (AND PATCHLEVEL): Same

    THE $ACE_ROOT/ace/config.h FILE [if you use a link to a platform-
    specific file, simply state which one]:

#ifndef SNA_ACE_CONFIG_H
#define SNA_ACE_CONFIG_H
// Turn off default DNS lookup
#define TAO_USE_DOTTED_DECIMAL_ADDRESSES 1
// Turn on in-memory growable notification queue
#define ACE_HAS_REACTOR_NOTIFICATION_QUEUE 1
// Turn on "best" collocation strategy as default
#define TAO_DEFAULT_COLLOCATION_STRATEGY TAO_COLLOCATION_BEST
// Preestablish all CORBA connections during startup
// TODO: Pre-establishment of connections is broken
//#define CIAO_PRE_ESTABLISH_CONNECTIONS 1
// Turn on immediate symbol resolution
#define ACE_DEFAULT_SHLIB_MODE RTLD_NOW | RTLD_GLOBAL
// Use monotonic clock
#define ACE_HAS_CLOCK_GETTIME_MONOTONIC 1
// Turn on high-resolution/monotonic clock in TAO, CIAO, and DAnCE by default
#define TAO_USE_HR_TIME_POLICY_STRATEGY 1
#include "ace/config-linux.h"
#endif


    THE $ACE_ROOT/include/makeinclude/platform_macros.GNU FILE [if you
    use a link to a platform-specific file, simply state which one
    (unless this isn't used in this case, e.g., with Microsoft Visual
    C++)]:
Not sure which one is used, but shouldn't matter for my question

    CONTENTS OF $ACE_ROOT/bin/MakeProjectCreator/config/default.features
    (used by MPC when you generate your own makefiles):

ace_idl_dependencies            = 1
boost                           = 0
ccm_direct_collocation          = 1
ccm_lw                          = 1
ccm_noevent                     = 1
dds4ccm_ndds                    = 1
gen_ostream                     = 0
install_rpath                   = 0
ndds                            = 1
optimize_collocated_invocations = 1
stl                             = 1
xerces2                         = 1


    AREA/CLASS/EXAMPLE AFFECTED:
N/A
    DOES THE PROBLEM AFFECT:
        COMPILATION?
N/A
        LINKING?
N/A
        EXECUTION?
N/A
        OTHER (please specify)?
N/A

    SYNOPSIS:
Usage of CORBA::ORB_var orb in a component's auto-generated reactor() method)

    DESCRIPTION:
The following code is auto-generated for a component's reactor() method:

      ACE_Reactor * reactor = 0;

     CORBA::Object_var ccm_object = this->ciao_context_->get_CCM_object();
      if ( ! CORBA::is_nil(ccm_object.in()))
      {
         CORBA::ORB_var orb = ccm_object->_get_orb ();
         if ( ! CORBA::is_nil(orb.in()))
         {
            reactor = orb->orb_core ()->reactor ();
         }
      }

      ...

Questions:
1. Since when it goes out of scope, CORBA::Object_var decrements the reference
   count and releases the resource when it counts down to zero, why doesn't there
   need to be a call to a _duplicate method on what is returned from the
   get_CCM_object() and reactor() calls?

2. For a component's port that is typed to a DDS4CCM connector If you are using an
    "_var" variable to hold the result from a get_connection_<port>_<basic port>() call,
    is it correct to use _duplicate to ensure the object held in the ciao_context_ is
    not prematurely freed?

3. Is it also required that _duplicate be used on similar get_connection_... calls for a CORBA client port?

    REPEAT BY:
N/A

    SAMPLE FIX/WORKAROUND:
N/A
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