ros2 watch

if 0

                     int32_t index;
                     msg_ok = sub_.wait_for_data(index);
                     

                     /* new data or reallocate */
                     if (msg_ok)
                     {
                         /* reallocate request */
                         if ( index == ROS_SHM_SEGMENT_WROTE_NUM )
                         {
                            ZORO_LOG_INFO("Reallocate SharedMemory Request");

                            // TODO: remove sub_.addr_sub

                            // re-attach-shared memory
                            bool attached=false;
                            ZORO_LOG_INFO("Try Attaching ...");
                            while (!attached)
                            {
                                if ( sub_.attach_topic_segment(topic_) )
                                {
                                    attached=true;
                                    ZORO_LOG_INFO("Attach Shared Memory: Success, topic <%s>", topic_.c_str());
                                    continue;
                                }
                                else
                                {
                                    ZORO_LOG_INFO("Attach Shared Memory: Failure, topic <%s>", topic_.c_str());
                                }
                                usleep(10000);
                            }
           
                            continue;
                         }
                         else /* new data arrived */
                         {
                             ZORO_LOG_INFO("New data arrived: index=%d",index);
                         }
                     }
                     else
                     {
                     //    ZORO_LOG_INFO("topic <%s> wait timeout",topic_.c_str());
                     }

                     msg_ok = false;

endif