iox-#751 Fix rpc c example by using iox_ws_mark_for_destruction

Signed-off-by: Christian Eltzschig <christian.eltzschig@apex.ai>

iceoryx_examples/request_response_in_c/client_c_waitset.c

@@ -18,6 +18,7 @@
 #include "iceoryx_binding_c/request_header.h"
 #include "iceoryx_binding_c/response_header.h"
 #include "iceoryx_binding_c/runtime.h"
+#include "iceoryx_binding_c/user_trigger.h"
 #include "iceoryx_binding_c/wait_set.h"
 #include "request_and_response_c_types.h"
 #include "sleep_for.h"
@@ -32,10 +33,14 @@
 bool keepRunning = true;
 const char APP_NAME[] = "iox-c-request-response-client-waitset";
 
+iox_ws_t waitset;
+iox_ws_storage_t waitsetStorage;
+
 void sigHandler(int signalValue)
 {
     (void)signalValue;
     keepRunning = false;
+    iox_ws_mark_for_destruction(waitset);
 }
 
 int main()
@@ -54,7 +59,6 @@ int main()
     int64_t expectedResponseSequenceId = requestSequenceId;
 
     //! [create waitset and attach client]
-    iox_ws_storage_t waitsetStorage;
     iox_ws_t waitset = iox_ws_init(&waitsetStorage);
 
     if (iox_ws_attach_client_state(waitset, client, ClientState_HAS_RESPONSE, 0U, NULL) != WaitSetResult_SUCCESS)
@@ -132,8 +136,11 @@ int main()
         }
         //! [process responses]
 
-        const uint32_t SLEEP_TIME_IN_MS = 950U;
-        sleep_for(SLEEP_TIME_IN_MS);
+        if (keepRunning)
+        {
+            const uint32_t SLEEP_TIME_IN_MS = 950U;
+            sleep_for(SLEEP_TIME_IN_MS);
+        }
     }
 
     //! [cleanup]