iox-eclipse-iceoryx#2330 Add comment for func

Author: khromenokroman

iceoryx_posh/source/roudi/roudi.cpp

@@ -161,6 +161,11 @@ void RouDi::shutdown() noexcept
     // Postpone the IpcChannelThread in order to receive TERMINATION
     m_runHandleRuntimeMessageThread = false;
 
+    /*
+     * This is necessary to prevent the main thread from exiting before
+     * the 'listen_thread_watchdog' has finished, hence ensuring a
+     * proper termination of the entire application.
+     */
     if (listen_thread_watchdog.joinable()) {
         listen_thread_watchdog.join();
     }
@@ -258,6 +263,10 @@ void RouDi::processRuntimeMessages(runtime::IpcInterfaceCreator&& roudiIpcInterf
     IOX_LOG(INFO, "RouDi is ready for clients");
     fflush(stdout); // explicitly flush 'stdout' for 'launch_testing'
 
+    /*
+     * We get information about how they are running. If as a unit, then we launch
+     * watchdog and send a notification about the launch, otherwise we do nothing
+     */
     const char* invocation_id = std::getenv("INVOCATION_ID");
     if (invocation_id != nullptr)
     {