Added scope_exit for closing session

rmw_zenoh_cpp/src/zenohd/main.cpp

@@ -36,6 +36,8 @@
 
 #include "rmw/error_handling.h"
 
+#include "rcpputils/scope_exit.hpp"
+
 static bool running = true;
 
 class KeyboardReader final
@@ -192,21 +194,26 @@ int main(int argc, char ** argv)
     return 1;
   }
 
-  z_owned_session_t s = z_open(z_move(config));
-  if (!z_check(s)) {
+  z_owned_session_t session = z_open(z_move(config));
+  if (!z_check(session)) {
     printf("Unable to open router session!\n");
     return 1;
   }
   printf(
     "Started Zenoh router with id %s.\n",
-    rmw_zenoh_cpp::liveliness::zid_to_str(z_info_zid(z_session_loan(&s))).c_str());
+    rmw_zenoh_cpp::liveliness::zid_to_str(z_info_zid(z_session_loan(&session))).c_str());
 #ifdef _WIN32
   SetConsoleCtrlHandler(quit, TRUE);
 #else
   signal(SIGINT, quit);
   signal(SIGTERM, quit);
 #endif
 
+  auto close_session = rcpputils::make_scope_exit(
+    [&session]() {
+      z_close(z_move(session));
+    });
+
   KeyboardReader keyreader;
 
   char c = 0;
@@ -218,8 +225,6 @@ int main(int argc, char ** argv)
       c = keyreader.readOne();
     } catch (const std::runtime_error &) {
       perror("read():");
-
-      z_close(z_move(s));
       return -1;
     }
 
@@ -230,7 +235,5 @@ int main(int argc, char ** argv)
     std::this_thread::sleep_for(std::chrono::milliseconds(100));
   }
 
-  z_close(z_move(s));
-
   return 0;
 }