Function markRootSuspended

packages/react-reconciler/src/ReactFiberLane.js:846–880

(
  root: FiberRoot,
  suspendedLanes: Lanes,
  spawnedLane: Lane,
  didAttemptEntireTree: boolean,
)

}

export function markRootSuspended(
  root: FiberRoot,
  suspendedLanes: Lanes,
  spawnedLane: Lane,
  didAttemptEntireTree: boolean,
) {
  // TODO: Split this into separate functions for marking the root at the end of
  // a render attempt versus suspending while the root is still in progress.
  root.suspendedLanes |= suspendedLanes;
  root.pingedLanes &= ~suspendedLanes;

  if (didAttemptEntireTree) {
    // Mark these lanes as warm so we know there's nothing else to work on.
    root.warmLanes |= suspendedLanes;
  } else {
    // Render unwound without attempting all the siblings. Do no mark the lanes
    // as warm. This will cause a prewarm render to be scheduled.
  }

  // The suspended lanes are no longer CPU-bound. Clear their expiration times.
  const expirationTimes = root.expirationTimes;
  let lanes = suspendedLanes;
  while (lanes > 0) {
    const index = pickArbitraryLaneIndex(lanes);
    const lane = 1 << index;

    expirationTimes[index] = NoTimestamp;

    lanes &= ~lane;
  }

  if (spawnedLane !== NoLane) {
    markSpawnedDeferredLane(root, spawnedLane, suspendedLanes);
  }
}

export function markRootPinged(root: FiberRoot, pingedLanes: Lanes) {
  root.pingedLanes |= root.suspendedLanes & pingedLanes;