Method ask

packages/effect/src/internal/fiberRuntime.ts:426–438

* Returns an effect that will contain information computed from the fiber * state and status while running on the fiber. * * This allows the outside world to interact safely with mutable fiber state * without locks or immutable data.

(
    f: (runtime: FiberRuntime<any, any>, status: FiberStatus.FiberStatus) => Z
  )

   * without locks or immutable data.
   */
  ask<Z>(
    f: (runtime: FiberRuntime<any, any>, status: FiberStatus.FiberStatus) => Z
  ): Effect.Effect<Z> {
    return core.suspend(() => {
      const deferred = core.deferredUnsafeMake<Z>(this._fiberId)
      this.tell(
        FiberMessage.stateful((fiber, status) => {
          core.deferredUnsafeDone(deferred, core.sync(() => f(fiber, status)))
        })
      )
      return core.deferredAwait(deferred)
    })
  }

  /**
   * Adds a message to be processed by the fiber on the fiber.