Fix atomic access of first message received

expressvpn · Jan 6, 2025 · ddbd606 · ddbd606
1 parent eb3855b
commit ddbd606
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/src/he/flow.c b/src/he/flow.c
@@ -409,8 +409,13 @@ he_return_code_t he_internal_flow_outside_data_verify_connection(he_conn_t *conn
   }
 
   // Check to see if this is our first message and trigger an event change if it is
+#ifdef HE_ENABLE_MULTITHREADED
   bool expected = false;
   if (atomic_compare_exchange_strong(&conn->first_message_received, &expected, true)) {
+#else
+  if (!conn->first_message_received) {
+    conn->first_message_received = true;
+#endif
     he_internal_generate_event(conn, HE_EVENT_FIRST_MESSAGE_RECEIVED);
   }