Callback functions for shutdown()?

Hi, I encountered an issue that seems need some customization to the shutdown() function:

I have a separate thread initiated and detached before polyscope::init() -- a server listening from other software for sending geometries in.

The server use a shared_ptr<UIState> which is also used in the main().

Now if I close the main window of polyscope, there's always an error pointing to the ~shared_ptr<UIState>.

I'm not 100% sure what happened there, but it seems the main thread delete the shared_ptr<UIState> before the other thread exit. And when the server tries to delete that shared_ptr, it points to nowhere?

I assume manually exit the separate thread before the main should help.

阅读报告中描述的 shutdown() 入口点以及 UIState 的所有权和生命周期路径。确定 shutdown hook 如何能够让 detached server 在共享状态被销毁之前停止，然后验证关闭主窗口时不会出现报告中的 shared_ptr 错误。