std.thread

let resume : Thread -> Result String ()

let yield : () -> ()

let spawn : (() -> ()) -> Thread

let spawn_on : forall a . Thread -> (() -> IO a) -> IO (IO a)

let new_thread : () -> IO Thread

let interrupt : Thread -> IO ()

let sleep : Int -> IO ()

let join : forall b a . IO a -> IO b -> IO (a, b)