Method cacheReady

packages/next/src/server/app-render/cache-signal.ts:88–95

* If there are inflight cache reads this Promise can resolve in a microtask however * if there are no inflight cache reads then we wait at least one task to allow initial * cache reads to be initiated.

()

   * cache reads to be initiated.
   */
  cacheReady() {
    return new Promise<void>((resolve) => {
      this.listeners.push(resolve)
      if (this.count === 0) {
        this.noMorePendingCaches()
      }
    })
  }

  beginRead() {
    this.count++