Set an application-defined assertion handler.
SDL_AssertionHandler handler,void *userdata);
|the SDL_AssertionHandler function to call when an assertion fails or NULL for the default handler
|a pointer that is passed to
This function allows an application to show its own assertion UI and/or force the response to an assertion failure. If the application doesn't provide this, SDL will try to do the right thing, popping up a system-specific GUI dialog, and probably minimizing any fullscreen windows.
This callback may fire from any thread, but it runs wrapped in a mutex, so it will only fire from one thread at a time.
This callback is NOT reset to SDL's internal handler upon SDL_Quit()!
This function is available since SDL 3.0.0.