...

1 files changed, 10 insertions, 0 deletions

diff --git a/src/platform/native/ui_application.cpp b/src/platform/native/ui_application.cpp
index b4794182..212d9104 100644
--- a/src/platform/native/ui_application.cpp
+++ b/src/platform/native/ui_application.cpp
@@ -2,4 +2,14 @@
 
 namespace cru::platform::native {
 IUiApplication* IUiApplication::instance = nullptr;
+
+IUiApplication::IUiApplication() {
+  if (instance) {
+    throw std::runtime_error("An ui application has already been created.");
+  }
+  
+  instance = this;
 }
+
+IUiApplication::~IUiApplication() { instance = nullptr; }
+}  // namespace cru::platform::native