"k8s.io/kubernetes/pkg/kubelet/checkpointmanager"
	"k8s.io/kubernetes/pkg/kubelet/checkpointmanager/errors"
)

var _ State = &stateCheckpoint{}

type stateCheckpoint struct {
	mux               sync.RWMutex
	cache             State
	checkpointManager checkpointmanager.CheckpointManager
	checkpointName    string
}

// NewStateCheckpoint creates new State for keeping track of pod resource allocations with checkpoint backend

type PubSub[T Maskable, M Maskable] struct {
	// atomics, keep at top:
	types          uint64
	numSubscribers int32
	maxSubscribers int32

	// not atomics:
	subs []*Sub[T]
	sync.RWMutex
}

// Publish message to the subscribers.
// Note that publish is always non-blocking send so that we don't block on slow receivers.
// Hence receivers should use buffered channel so as not to miss the published events.

	lastUpdatedAt time.Time
}

// objectCountTracker implements StorageObjectCountTracker with
// reader/writer mutual exclusion lock.
type objectCountTracker struct {
	clock clock.PassiveClock

	lock   sync.RWMutex
	counts map[string]*timestampedCount
}

func (t *objectCountTracker) Set(groupResource string, count int64) {
	if count <= -1 {
		// a value of -1 indicates that the 'Count' call failed to contact

	userInfo    user.Info

	// other elements are always accessed in single goroutine.
	// But ValidatingAdmissionWebhook add annotations concurrently.
	annotations     map[string]annotation
	annotationsLock sync.RWMutex

	reinvocationContext ReinvocationContext
}

type annotation struct {
	level auditinternal.Level
	value string
}

type TierConfigMgr struct {
	sync.RWMutex `msg:"-"`
	drivercache  map[string]WarmBackend `msg:"-"`

	Tiers           map[string]madmin.TierConfig `json:"tiers"`
	lastRefreshedAt time.Time                    `msg:"-"`
}

type tierMetrics struct {
	sync.RWMutex  // protects requestsCount only
	requestsCount map[string]struct {
		success int64
		failure int64
	}

	keyCertBundle                *util.KeyCertBundle
	raOpts                       *IstioRAOptions
	caCertificatesFromMeshConfig map[string]string
	certSignerDomain             string
	// mutex protects the R/W to caCertificatesFromMeshConfig.
	mutex sync.RWMutex
}

var pkiRaLog = log.RegisterScope("pkira", "Istiod RA log")

// NewKubernetesRA : Create a RA that interfaces with K8S CSR CA

	var (
		// prevDriveIOStats is used to calculate "per second"
		// values for IOStat related disk metrics e.g. reads/sec.
		prevDriveIOStats            map[string]madmin.DiskIOStats
		prevDriveIOStatsMu          sync.RWMutex
		prevDriveIOStatsRefreshedAt time.Time
	)

	loadDriveMetrics := func(ctx context.Context) (v storageMetrics, err error) {
		objLayer := newObjectLayerFn()
		if objLayer == nil {
			return
		}

func init() {
	if httpmuxgo121.Value() == "1" {
		use121 = true
		httpmuxgo121.IncNonDefault()
	}
}

// serveMux121 holds the state of a ServeMux needed for Go 1.21 behavior.
type serveMux121 struct {
	mu    sync.RWMutex
	m     map[string]muxEntry
	es    []muxEntry // slice of entries sorted from longest to shortest.
	hosts bool       // whether any patterns contain hostnames
}

type muxEntry struct {
	h       Handler

	// socketFileToInfo is a map containing the set of successfully registered plugins
	// The keys are plugin socket file paths. The values are PluginInfo objects
	socketFileToInfo map[string]PluginInfo
	sync.RWMutex
}

var _ DesiredStateOfWorld = &desiredStateOfWorld{}

// Generate a detailed error msg for logs
func generatePluginMsgDetailed(prefixMsg, suffixMsg, socketPath, details string) (detailedMsg string) {

	return g
}

type goRoutineMap struct {
	operations                map[string]operation
	exponentialBackOffOnError bool
	cond                      *sync.Cond
	lock                      sync.RWMutex
}

// operation holds the state of a single goroutine.
type operation struct {
	operationPending bool
	expBackoff       exponentialbackoff.ExponentialBackoff
}

func (grm *goRoutineMap) Run(