func (ps *PubSub[T, M]) Subscribe(mask M, subCh chan T, doneCh <-chan struct{}, filter func(entry T) bool) error {
	totalSubs := atomic.AddInt32(&ps.numSubscribers, 1)
	if ps.maxSubscribers > 0 && totalSubs > ps.maxSubscribers {
		atomic.AddInt32(&ps.numSubscribers, -1)
		return fmt.Errorf("the limit of `%d` subscribers is reached", ps.maxSubscribers)
	}
	ps.Lock()
	defer ps.Unlock()

			w.Header().Set(RetryAfter, "60")

			w.WriteHeader(http.StatusServiceUnavailable)
			w.Write([]byte(http.ErrServerClosed.Error()))
			return
		}

		atomic.AddInt32(&srv.requestCount, 1)
		defer atomic.AddInt32(&srv.requestCount, -1)

		// Handle request using passed handler.
		handler.ServeHTTP(w, r)
	})

	srv.listenerMutex.Lock()
	srv.Handler = wrappedHandler
	srv.listener = listener

		}
	}
}

func (wg *WaitGroup) Add(i int32) {
	select {
	case <-wg.done:
		panic("use of an already closed WaitGroup")
	default:
	}
	atomic.AddInt32(&wg.count, i)
}

func (wg *WaitGroup) Done() {
	i := atomic.AddInt32(&wg.count, -1)
	if i == 0 {
		close(wg.done)
	}
}

func (wg *WaitGroup) C() <-chan struct{} {
	return wg.done
}

			if !ok {
				return
			}
			switch v := oi.(type) {
			case ReplicateObjectInfo:
				p.stats.incQ(v.Bucket, v.Size, v.DeleteMarker, v.OpType)
				atomic.AddInt32(&p.activeMRFWorkers, 1)
				replicateObject(p.ctx, v, p.objLayer)
				atomic.AddInt32(&p.activeMRFWorkers, -1)
				p.stats.decQ(v.Bucket, v.Size, v.DeleteMarker, v.OpType)

			default:

	totalS3Canceled         HTTPAPIStats
}

func (st *HTTPStats) loadRequestsInQueue() int32 {
	return atomic.LoadInt32(&st.s3RequestsInQueue)
}

func (st *HTTPStats) addRequestsInQueue(i int32) {
	atomic.AddInt32(&st.s3RequestsInQueue, i)
}

func (st *HTTPStats) incS3RequestsIncoming() {
	// Golang automatically resets to zero if this overflows
	atomic.AddUint64(&st.s3RequestsIncoming, 1)
}

				case errors.Is(err, errFileNotFound):
					atomic.StoreInt32(&missingPartsHeal, 1)
				case errors.Is(err, errFileCorrupt):
					atomic.StoreInt32(&bitrotHeal, 1)
				case errors.Is(err, errDiskNotFound):
					atomic.AddInt32(&disksNotFound, 1)
				}

				// This will be communicated upstream.
				p.orgReaders[bufIdx] = nil
				if br, ok := p.readers[i].(io.Closer); ok {
					br.Close()
				}
				p.readers[i] = nil

	})
}

func (s *xlStorage) NSScanner(ctx context.Context, cache dataUsageCache, updates chan<- dataUsageEntry, scanMode madmin.HealScanMode, weSleep func() bool) (dataUsageCache, error) {
	atomic.AddInt32(&s.scanning, 1)
	defer atomic.AddInt32(&s.scanning, -1)

	var err error
	stopFn := globalScannerMetrics.log(scannerMetricScanBucketDrive, s.drivePath, cache.Info.Name)
	defer func() {
		res := make(map[string]string)