Refactor of regenerate_port (#3695)

Signed-off-by: Miguel Company <MiguelCompany@eprosima.com>
Co-authored-by: Miguel Company <MiguelCompany@eprosima.com>
(cherry picked from commit e8fb3ec)

Co-authored-by: jsantiago-eProsima <90755661+jsantiago-eProsima@users.noreply.github.com>

src/cpp/rtps/transport/shared_mem/SharedMemManager.hpp

@@ -783,10 +783,9 @@ class SharedMemManager :
 
         void regenerate_port()
         {
-            auto new_port = shared_mem_manager_->regenerate_port(global_port_, global_port_->open_mode());
-
-            auto new_listener = new_port->create_listener();
-
+            auto new_port = global_port_;
+            shared_mem_manager_->regenerate_port(new_port, new_port->open_mode());
+            auto new_listener = std::make_shared<Listener>(shared_mem_manager_, new_port);
             *this = std::move(*new_listener);
         }
 
@@ -930,9 +929,7 @@ class SharedMemManager :
         void regenerate_port()
         {
             recover_blocked_processing();
-            auto new_port = shared_mem_manager_->regenerate_port(global_port_, open_mode_);
-
-            *this = std::move(*new_port);
+            shared_mem_manager_->regenerate_port(global_port_, open_mode_);
         }
 
         SharedMemManager* shared_mem_manager_;
@@ -1016,11 +1013,11 @@ class SharedMemManager :
 
 private:
 
-    std::shared_ptr<Port> regenerate_port(
-            std::shared_ptr<SharedMemGlobal::Port> port,
+    void regenerate_port(
+            std::shared_ptr<SharedMemGlobal::Port>& port,
             SharedMemGlobal::Port::OpenMode open_mode)
     {
-        return std::make_shared<Port>(this, global_segment_.regenerate_port(port, open_mode), open_mode);
+        port = global_segment_.regenerate_port(port, open_mode);
     }
 
     /**