s.next.parent = s
				}
				// Add t first in s's wait list.
				s.waitlink = t
				s.waittail = t.waittail
				if s.waittail == nil {
					s.waittail = t
				}
				s.waiters = t.waiters
				if s.waiters+1 != 0 {
					s.waiters++
				}
				t.parent = nil
				t.prev = nil
				t.next = nil
				t.waittail = nil
			} else {
				// Add s to end of t's wait list.
				if t.waittail == nil {

	closed   uint32
	timer    *timer // timer feeding this chan
	elemtype *_type // element type
	sendx    uint   // send index
	recvx    uint   // receive index
	recvq    waitq  // list of recv waiters
	sendq    waitq  // list of send waiters

	// lock protects all fields in hchan, as well as several
	// fields in sudogs blocked on this channel.
	//
	// Do not change another G's status while holding this lock

			// needed, based on the number of available
			// unlocked OS threads at the time waiter
			// calls runtime.LockOSThread(), but the goal
			// of doing this every time through the loop
			// is to race thread creation with v.fn(want)
			// being executed. Via the once boolean we
			// also encourage one in 5 waiters to return
			// locked after participating in only one
			// question response sequence. This allows the

	// because c was closed.
	success bool

	// waiters is a count of semaRoot waiting list other than head of list,
	// clamped to a uint16 to fit in unused space.
	// Only meaningful at the head of the list.
	// (If we wanted to be overly clever, we could store a high 16 bits
	// in the second entry in the list.)
	waiters uint16

	parent   *sudog // semaRoot binary tree

    WaiterThread waiter1 = new WaiterThread(future);
    waiter1.start();
    waiter1.awaitWaiting();

    WaiterThread waiter2 = new WaiterThread(future);
    waiter2.start();
    waiter2.awaitWaiting();
    // The waiter queue should be waiter2->waiter1

    // This should wake up waiter1 and cause the waiter1 node to be removed.
    waiter1.interrupt();

    waiter1.join();

    WaiterThread waiter1 = new WaiterThread(future);
    waiter1.start();
    waiter1.awaitWaiting();

    WaiterThread waiter2 = new WaiterThread(future);
    waiter2.start();
    waiter2.awaitWaiting();
    // The waiter queue should be waiter2->waiter1

    // This should wake up waiter1 and cause the waiter1 node to be removed.
    waiter1.interrupt();

    waiter1.join();

	"path"
	"slices"
	"strings"
	"time"
)

// Writer provides sequential writing of a tar archive.
// [Writer.WriteHeader] begins a new file with the provided [Header],
// and then Writer can be treated as an io.Writer to supply that file's data.
type Writer struct {
	w    io.Writer
	pad  int64      // Amount of padding to write after current file entry
	curr fileWriter // Writer for current file entry

			return i
		}
	}
	return -1
}

// writer is a buffered writer.
type writer interface {
	Flush() error
	io.Writer
	io.ByteWriter
}

// encoder encodes an image to the GIF format.
type encoder struct {
	// w is the writer to write to. err is the first error encountered during
	// writing. All attempted writes after the first error become no-ops.
	w   writer
	err error

func StaticPodControlPlane(client clientset.Interface, waiter apiclient.Waiter, pathMgr StaticPodPathManager, cfg *kubeadmapi.InitConfiguration, etcdUpgrade, renewCerts bool, oldEtcdClient, newEtcdClient etcdutil.ClusterInterrogator) error {
	recoverManifests := map[string]string{}
	var isExternalEtcd bool

	beforePodHashMap, err := waiter.WaitForStaticPodControlPlaneHashes(cfg.NodeRegistration.Name)
	if err != nil {

}

// PerformControlPlaneUpgrade actually performs the upgrade procedure for the cluster of your type (self-hosted or static-pod-hosted)
func PerformControlPlaneUpgrade(flags *applyFlags, client clientset.Interface, waiter apiclient.Waiter, initCfg *kubeadmapi.InitConfiguration, upgradeCfg *kubeadmapi.UpgradeConfiguration) error {
	// OK, the cluster is hosted using static pods. Upgrade a static-pod hosted cluster