type onceErr struct {
	Err   error
	Count int
}

// Holds a map of recently logged errors.
type logOnceType struct {
	IDMap map[string]onceErr
	sync.Mutex
}

func (l *logOnceType) logOnceConsoleIf(ctx context.Context, subsystem string, err error, id string, errKind ...interface{}) {
	if err == nil {
		return
	}

	nerr := unwrapErrs(err)
	l.Lock()

	AccessToken string `json:"access_token"`
	Expiry      int    `json:"expires_in"`
}

// KeycloakProvider implements Provider interface for KeyCloak Identity Provider.
type KeycloakProvider struct {
	sync.Mutex

	oeConfig DiscoveryDoc
	client   http.Client
	adminURL string
	realm    string

	// internal value refreshed
	accessToken Token
}

	errors map[int]error
	// The error to return when no error value is programmed
	defaultErr error
	// The current API call number
	callNR int
	// Data protection
	mu sync.Mutex
}

func newNaughtyDisk(d StorageAPI, errs map[int]error, defaultErr error) *naughtyDisk {
	return &naughtyDisk{disk: d, errors: errs, defaultErr: defaultErr}
}

func (d *naughtyDisk) String() string {

// found, otherwise use default parameters
func newSrvConfig(objAPI ObjectLayer) error {
	// Initialize server config.
	srvCfg := newServerConfig()

	// hold the mutex lock before a new config is assigned.
	globalServerConfigMu.Lock()
	globalServerConfig = srvCfg
	globalServerConfigMu.Unlock()

	// Save config into file.
	return saveServerConfig(GlobalContext, objAPI, srvCfg)

	resultsDone := make(chan metaCacheEntriesSorted)
	// Copy so we can mutate
	resCh := resultsDone
	var done bool
	var mu sync.Mutex
	resErr := io.EOF

	go func() {
		var results metaCacheEntriesSorted
		var returned bool
		for entry := range in {
			if returned {
				// past limit
				continue
			}
			mu.Lock()

			runtime.SetBlockProfileRate(0)
			return buf.Bytes(), err
		}
	case madmin.ProfilerMutex:
		prof.record("mutex", 0, "before")
		runtime.SetMutexProfileFraction(1)
		prof.stopFn = func() ([]byte, error) {
			var buf bytes.Buffer
			err := pprof.Lookup("mutex").WriteTo(&buf, 0)
			runtime.SetMutexProfileFraction(0)
			return buf.Bytes(), err
		}
	case madmin.ProfilerThreads:

	srcCfg := getServerSystemCfg()
	clnts := newBootstrapRESTClients(endpointServerPools, gm)
	var onlineServers int
	var offlineEndpoints []error
	var incorrectConfigs []error
	var retries int
	var mu sync.Mutex
	for onlineServers < len(clnts)/2 {
		var wg sync.WaitGroup
		wg.Add(len(clnts))
		onlineServers = 0
		for _, clnt := range clnts {
			go func(clnt *bootstrapRESTClient) {
				defer wg.Done()

	httpLoggerExtension = ".http.log"
)

const (
	statusOffline = iota
	statusOnline
	statusClosed
)

var (
	logChBuffers = make(map[string]chan interface{})
	logChLock    = sync.Mutex{}
)

// Config http logger target
type Config struct {
	Enabled     bool              `json:"enabled"`
	Name        string            `json:"name"`
	UserAgent   string            `json:"userAgent"`

type RingBuffer struct {
	buf       []byte
	size      int
	r         int // next position to read
	w         int // next position to write
	isFull    bool
	err       error
	block     bool
	mu        sync.Mutex
	wg        sync.WaitGroup
	readCond  *sync.Cond // Signaled when data has been read.
	writeCond *sync.Cond // Signaled when data has been written.
}

// New returns a new RingBuffer whose buffer has the given size.

	actionsLatency [lifecycle.ActionCount]lockedLastMinuteLatency

	// currentPaths contains (string,*currentPathTracker) for each disk processing.
	// Alignment not required.
	currentPaths sync.Map

	cycleInfoMu sync.Mutex
	cycleInfo   *currentScannerCycle
}

var globalScannerMetrics scannerMetrics

const (
	// START Realtime metrics, that only to records
	// last minute latencies and total operation count.