A queue of completed asynchronous I/O tasks.
Defined in <SDL3/SDL_asyncio.h>
typedef struct SDL_AsyncIOQueue SDL_AsyncIOQueue;
When starting an asynchronous operation, you specify a queue for the new task. A queue can be asked later if any tasks in it have completed, allowing an app to manage multiple pending tasks in one place, in whatever order they complete.
This struct is available since SDL 3.0.0.