Function runFiber

packages/effect/src/internal/fiberRuntime.ts:2236–2255

(eff: Effect.Effect<A, E, R>, interruptImmediately = false)

          return exits
        }
        const runFiber = <A, E, R>(eff: Effect.Effect<A, E, R>, interruptImmediately = false) => {
          const runnable = core.uninterruptible(graft(eff))
          const fiber = unsafeForkUnstarted(
            runnable,
            parent,
            parent.currentRuntimeFlags,
            fiberScope.globalScope
          )
          parent.currentScheduler.scheduleTask(
            () => {
              if (interruptImmediately) {
                fiber.unsafeInterruptAsFork(parent.id())
              }
              fiber.resume(runnable)
            },
            0,
            fiber
          )
          return fiber
        }
        const onInterruptSignal = () => {
          if (!processAll) {
            target -= todos.length