func (m *muxServer) checkRemoteAlive() {
	t := time.NewTicker(m.clientPingInterval)
	defer t.Stop()
	for {
		select {
		case <-m.ctx.Done():
			return
		case <-t.C:
			last := time.Since(time.Unix(atomic.LoadInt64(&m.LastPing), 0))
			if last > 4*m.clientPingInterval {
				gridLogIf(m.ctx, fmt.Errorf("canceling remote connection %s not seen for %v", m.parent, last))
				m.close()
				return
			}
		}
	}
}

)

func TestScanner(t *testing.T) {
	data := []byte("abcdefghijklmnopqrstuvwxyz0123456789")

	var i int
	r := bytes.NewReader(data)
	scanner := newScanner(r)
	for scanner.pos < atomic.LoadInt64(&scanner.end) {
		c := scanner.next()
		if scanner.readerErr != nil {
			t.Fatal(scanner.readerErr)
		}
		if c != data[i] {
			t.Fatalf("expected %s, got %s", string(data[i]), string(c))
		}

func (h *Target) Stats() types.TargetStats {
	h.logChMu.RLock()
	queueLength := len(h.logCh)
	h.logChMu.RUnlock()

	return types.TargetStats{
		TotalMessages:  atomic.LoadInt64(&h.totalMessages),
		FailedMessages: atomic.LoadInt64(&h.failedMessages),
		QueueLength:    queueLength,
	}
}

// Init initialize kafka target
func (h *Target) Init(ctx context.Context) error {
	if !h.kconfig.Enabled {

	acc := e.cached.Load()
	if lastT := atomic.LoadInt64(&e.cachedSec); lastT != t {
		// Check if lastT was changed by someone else.
		if atomic.CompareAndSwapInt64(&e.cachedSec, lastT, t) {
			// Now we swap in a new.
			newAcc := &AccElem{}
			old := e.cached.Swap(newAcc)
			var a AccElem
			a.Size = atomic.LoadInt64(&old.Size)
			a.Total = atomic.LoadInt64(&old.Total)
			a.N = atomic.LoadInt64(&old.N)
			e.mu.Lock()

	n, err = r.reader.Read(p)
	atomic.AddInt64(&r.bytesRead, int64(n))
	return n, err
}

func (r *countUpReader) BytesRead() int64 {
	if r == nil {
		return 0
	}
	return atomic.LoadInt64(&r.bytesRead)
}

func newCountUpReader(reader io.Reader) *countUpReader {
	return &countUpReader{
		reader: reader,
	}
}

type progressReader struct {
	rc              io.ReadCloser

	for d.remaining() > 0 {
		_, err := d.emitAny()
		if err != nil {
			d.err = err
			break
		}
		d.skipSpaces()
	}
}

func (d *Decoder) emitAny() (interface{}, error) {
	if d.pos >= atomic.LoadInt64(&d.end) {
		return nil, d.mkError(ErrUnexpectedEOF)
	}
	offset := d.pos - 1
	i, t, err := d.any()
	if d.willEmit() {
		d.metaCh <- &MetaValue{
			Offset:    int(offset),
			Length:    int(d.pos - offset),

				// indicate finish with success
				quitFlag = true

				if !writer.flushRecords() {
					break
				}
				// Write Stats message, then End message
				bytesReturned := atomic.LoadInt64(&writer.bytesReturned)
				if !writer.write(newStatsMessage(writer.finBytesScanned, writer.finBytesProcessed, bytesReturned)) {
					break
				}
				writer.write(endMessage)
			} else {
				for payload.Len() > 0 {

				closeValid <- struct{}{}
			}
			var tmp User
			now := time.Now().UnixNano()
			err := tx.Session(&gorm.Session{}).First(&tmp, id).Error
			if err == nil {
				closeFinishedAt := atomic.LoadInt64(&closeFinishedAt)
				if (closeFinishedAt != 0) && (now > closeFinishedAt) {
					lastErr = errors.New("must got error after database closed")
					break
				}
				continue
			}
			lastErr = err
			break

func (c *Client) IsOnline() bool {
	return atomic.LoadInt32(&c.connected) == online
}

// LastConn returns when the disk was (re-)connected
func (c *Client) LastConn() time.Time {
	return time.Unix(0, atomic.LoadInt64(&c.lastConn))
}

// LastError returns previous error
func (c *Client) LastError() error {
	c.RLock()
	defer c.RUnlock()
	return fmt.Errorf("[%s] %w", c.lastErrTime.Format(time.RFC3339), c.lastErr)
}

		// Already closed. This is not an error state;
		// we may just be delivering the last responses.
		return true
	}

	// Only check ping when not closed.
	if got := time.Since(time.Unix(0, atomic.LoadInt64(&m.LastPong))); got > m.clientPingInterval*2 {
		m.respMu.Unlock()
		if debugPrint {
			fmt.Printf("Mux %d: last pong %v ago, disconnecting\n", m.MuxID, got)
		}