修复 crash 的问题

samples/api/texture_loading/texture_loading.cpp

@@ -26,6 +26,7 @@ TextureLoading::TextureLoading()
 	zoom = -2.5f;
 	rotation = { 0.0f, 15.0f, 0.0f };
 	title = "Texture loading";
+	this_instance = this;
 }
 
 TextureLoading::~TextureLoading()
@@ -50,6 +51,7 @@ TextureLoading::~TextureLoading()
 	vertex_buffer.reset();
 	index_buffer.reset();
 	uniform_buffer_vs.reset();
+	//stop();
 }
 
 // Enable physical device features required for this example
@@ -507,6 +509,7 @@ void TextureLoading::build_command_buffers()
 
 void TextureLoading::draw()
 {
+	std::unique_lock<std::mutex> lock(mtx);
 	ApiVulkanSample::prepare_frame();
 
 	// Command buffer to be submitted to the queue
@@ -916,15 +919,51 @@ bool TextureLoading::prepare(const vkb::ApplicationOptions& options)
 	setup_descriptor_set_bg();
 	build_command_buffers();
 	prepared = true;
+	//start();
 	return true;
 }
 
+//void TextureLoading::updateTexture()
+//{
+//	std::unique_lock<std::mutex> lock(mtx);
+//	std::cout << "Working in thread: " << std::this_thread::get_id() << std::endl;
+//	int    width = 640;
+//	int    height = 480;
+//	int    rowStride;
+//	auto   testImage = generateSimpleTestImage(width, height, &rowStride);
+//	size_t dataSize = testImage.size();
+//	processWithVulkan(testImage.data(), width, height, rowStride, dataSize, cam_text);
+//}
+//
+//void TextureLoading::run() {
+//	std::this_thread::sleep_for(std::chrono::milliseconds(5000));
+//	while (running) 
+//	{
+//		updateTexture();
+//		std::this_thread::sleep_for(std::chrono::milliseconds(100));
+//	}
+//}
+//
+//void TextureLoading::start() {
+//	running = true;
+//	// 启动线程执行 run 方法
+//	workerThread = std::thread(&TextureLoading::run, this);
+//}
+//
+//void TextureLoading::stop() {
+//	running = false;
+//	if (workerThread.joinable()) {
+//		workerThread.join();
+//	}
+//}
+
 void TextureLoading::render(float delta_time)
 {
 	if (!prepared)
 	{
 		return;
 	}
+
 	draw();
 }
 
@@ -959,6 +998,7 @@ void TextureLoadProcessWithVulkan(uint8_t* data, int width, int height, int rowS
 
 void TextureLoading::processWithVulkan(uint8_t* data, int width, int height, int rowStride, size_t dataSize, Texture& out_texture)
 {
+	std::unique_lock<std::mutex> lock(mtx);
 	VkDevice& device = get_device().get_handle();
 	const VkPhysicalDevice& physicalDevice = get_device().get_gpu().get_handle();
 	if (out_texture.image == VK_NULL_HANDLE)