Add topic name and QoS profile to Publisher_ struct

r2r/src/publishers.rs

@@ -38,6 +38,8 @@ unsafe impl<T> Send for Publisher<T> where T: WrappedTypesupport {}
 
 pub(crate) struct Publisher_ {
     handle: rcl_publisher_t,
+    topic_name: String,
+    qos_profile: QosProfile,
 
     // TODO use a mpsc to avoid the mutex?
     poll_inter_process_subscriber_channels: Mutex<Vec<oneshot::Sender<()>>>,
@@ -155,6 +157,8 @@ pub fn create_publisher_helper(
     if result == RCL_RET_OK as i32 {
         Ok(Publisher_ {
             handle: publisher_handle,
+            topic_name: topic.to_string(),
+            qos_profile,
             poll_inter_process_subscriber_channels: Mutex::new(Vec::new()),
         })
     } else {