Function callback

repos/effect/packages/effect/src/internal/effect.ts:1101–1107

(
  register: (
    this: Scheduler.Scheduler,
    resume: (effect: Effect.Effect<A, E, R>) => void,
    signal: AbortSignal
  ) => void | Effect.Effect<void, never, R>
)

) => Effect.Effect<A, E, R> = makePrimitive({
  op: "Async",
  single: false,
  [evaluate](fiber) {
    const register = internalCall(() => this[args][0].bind(fiber.currentScheduler))
    let resumed = false
    let yielded: boolean | Primitive = false
    const controller = this[args][1] ? new AbortController() : undefined
    const onCancel = register((effect) => {
      if (resumed) return
      resumed = true
      if (yielded) {