}

// unixStat keeps a statistic how many requests were dropped within
// a single second.
type unixStat struct {
	unixTime int64
	requests int64
}

type droppedRequestsStats struct {
	lock sync.RWMutex

	// history stores the history of dropped requests.
	history []unixStat

	// To reduce lock-contention, we store the information about
	// the current second here, which we can then access under
	// reader lock.

}

// BucketTargetSys represents bucket targets subsystem
type BucketTargetSys struct {
	sync.RWMutex
	arnRemotesMap map[string]arnTarget
	targetsMap    map[string][]madmin.BucketTarget
	hMutex        sync.RWMutex
	hc            map[string]epHealth
	hcClient      *madmin.AnonymousClient
	aMutex        sync.RWMutex
	arnErrsMap    map[string]arnErrs // map of ARN to error count of failures to get target
}

type Config struct {
	// Flag indicating whether callhome is enabled.
	Enable bool `json:"enable"`

	// The interval between callhome cycles
	Frequency time.Duration `json:"frequency"`
}

var configLock sync.RWMutex

// Enabled - indicates if callhome is enabled or not
func (c *Config) Enabled() bool {
	configLock.RLock()
	defer configLock.RUnlock()

	return c.Enable
}

	r.mutex.RLock()
	defer r.mutex.RUnlock()
	return r.resources[r.keys[resource.GroupResource()]][subresource]
}
func (r *equivalentResourceRegistry) KindFor(resource schema.GroupVersionResource, subresource string) schema.GroupVersionKind {
	r.mutex.RLock()
	defer r.mutex.RUnlock()
	return r.kinds[resource][subresource]
}

//   - github.com/breml/rootcerts
//
// Do not remove or change the type signature.
// See go.dev/issue/67401.
//
//go:linkname systemRoots
var (
	once           sync.Once
	systemRootsMu  sync.RWMutex
	systemRoots    *CertPool
	systemRootsErr error
	fallbacksSet   bool
)

func systemRootsPool() *CertPool {
	once.Do(initSystemRoots)
	systemRootsMu.RLock()
	defer systemRootsMu.RUnlock()

		sourcesReadyFn: sourcesReadyFn,
	}
}

// sourcesImpl implements SourcesReady.  It is thread-safe.
type sourcesImpl struct {
	// lock protects access to sources seen.
	lock sync.RWMutex
	// set of sources seen.
	sourcesSeen sets.Set[string]
	// sourcesReady is a function that evaluates if the sources are ready.
	sourcesReadyFn SourcesReadyFn
}

*/

package generic

import (
	"sync"

	"k8s.io/apimachinery/pkg/runtime/schema"
	quota "k8s.io/apiserver/pkg/quota/v1"
)

// implements a basic registry
type simpleRegistry struct {
	lock sync.RWMutex
	// evaluators tracked by the registry
	evaluators map[schema.GroupResource]quota.Evaluator
}

// NewRegistry creates a simple registry with initial list of evaluators

)

// verifies the cacheWatcher.process goroutine is properly cleaned up even if
// the writes to cacheWatcher.result channel is blocked.
func TestCacheWatcherCleanupNotBlockedByResult(t *testing.T) {
	var lock sync.RWMutex
	var w *cacheWatcher
	count := 0
	filter := func(string, labels.Set, fields.Set) bool { return true }
	forget := func(drainWatcher bool) {
		lock.Lock()
		defer lock.Unlock()
		count++

	// for race conditions.
	Addresses map[cluster.ID][]string

	// NOTE: The copystructure library is not able to copy unexported fields, so the mutex will not be copied.
	mutex sync.RWMutex
}

func (m *AddressMap) Len() int {
	if m == nil {
		return 0
	}
	m.mutex.RLock()
	defer m.mutex.RUnlock()

	return len(m.Addresses)
}

func (m *AddressMap) DeepCopy() *AddressMap {
	if m == nil {
		return nil
	}

	v1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/types"
	"k8s.io/apimachinery/pkg/util/sets"
	kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
)

type FakeMirrorClient struct {
	mirrorPodLock sync.RWMutex
	// Note that a real mirror manager does not store the mirror pods in
	// itself. This fake manager does this to track calls.
	mirrorPods   sets.Set[string]
	createCounts map[string]int
	deleteCounts map[string]int
}