Kas süsteemis on olemas Run Loop kontseptsioon globaalsele voolule?

In iOS, there is the concept of Run Loop, which manages event and timer processing in a thread. For the main (primary) thread of the system, the Run Loop is created automatically and started by the system, ensuring processing of user events, UI updates, and other tasks.

For global (background) threads, the Run Loop is not created automatically. If a background thread needs to use a Run Loop (for example, for processing events or timers), it must be created and started manually. Therefore, a global thread itself does not have an automatically started Run Loop, unlike the main thread.

Example of creating and starting a Run Loop in a background thread:

let thread = Thread {
    let runLoop = RunLoop.current
    runLoop.add(Port(), forMode: .default)
    runLoop.run()
}
thread.start()

In summary: the concept of Run Loop exists for any thread, but for a global (background) thread, it is not started automatically by the system and requires explicit creation and start.