修复 crash 的问题

samples/api/texture_loading/texture_loading.h

@@ -24,6 +24,8 @@
 #include <ktx.h>
 
 #include "api_vulkan_sample.h"
+#include <thread>
+#include <mutex>
 
   // Vertex layout for this example
 struct TextureLoadingVertexStructure
@@ -117,6 +119,16 @@ public:
 
 public:
 	void prepare_pipeline_bg();
+private:
+	std::thread workerThread;
+	bool running = false;
+
+public:
+	//void run();
+	//void start();
+	std::mutex mtx;
+	//void stop();
+	//void updateTexture();
 };
 
 std::unique_ptr<vkb::Application> create_texture_loading();