// the function finishes executing, Run returns context.DeadlineExceeded to the caller.
// channel so that the work function can attempt to exit gracefully.
// Multiple calls to Run will run independently of each other.
func (d *DeadlineWorker) Run(work func() error) error {
	c := make(chan ioret[struct{}], 1)
	t := time.NewTimer(d.timeout)
	go func() {
		c <- ioret[struct{}]{val: struct{}{}, err: work()}
	}()

	if m.GetRLock(ctx, "", "", time.Second) {
		clocked <- true
		<-cunlock
		m.RUnlock()
		cdone <- true
	}
}

// Borrowed from rwmutex_test.go
func doTestParallelReaders(numReaders, gomaxprocs int) {
	runtime.GOMAXPROCS(gomaxprocs)
	m := NewLRWMutex()

	clocked := make(chan bool)
	cunlock := make(chan bool)
	cdone := make(chan bool)

package com.google.common.collect.testing;

import com.google.common.annotations.GwtCompatible;
import java.util.Locale;

/**
 * Methods factored out so that they can be emulated differently in GWT.
 *
 * <p>This class is emulated in GWT.
 *
 * @author Hayward Chan
 */
@GwtCompatible
final class Platform {
  static <T> T[] clone(T[] array) {
    return array.clone();
  }

			case <-saverQuitCh:
				// persist in-memory state immediately to disk.
				batchLogIf(ctx, ri.updateAfter(ctx, api, 0, job))
				return
			}
		}
	}()

	expireCh := make(chan []expireObjInfo, workerSize)
	expireDoneCh := make(chan struct{})
	go func() {
		defer close(expireDoneCh)
		batchObjsForDelete(ctx, r, ri, job, api, wk, expireCh)
	}()

	var (
		prevObj       ObjectInfo

	remoteHost := remote.HostName()

	// 1: Echo
	serverSent := make(chan struct{})
	serverCanceled := make(chan struct{})
	register := func(manager *Manager) {
		errFatal(manager.RegisterStreamingHandler(handlerTest, StreamHandler{
			Handle: func(ctx context.Context, payload []byte, _ <-chan []byte, resp chan<- []byte) *RemoteErr {
				// Send many responses.
				// Test that this doesn't block.

	input        chan *queueItem  // input for workers
	queue        chan *queueItem  // output from workers in order
	err          error            // global error state, only touched by Reader.Read
	bufferPool   sync.Pool        // pool of []byte objects for input
	csvDstPool   sync.Pool        // pool of [][]string used for output

	// has never been replaced.
	Healing() *healingTracker
	DiskInfo(ctx context.Context, opts DiskInfoOptions) (info DiskInfo, err error)
	NSScanner(ctx context.Context, cache dataUsageCache, updates chan<- dataUsageEntry, scanMode madmin.HealScanMode, shouldSleep func() bool) (dataUsageCache, error)

	// Volume operations.
	MakeVol(ctx context.Context, volume string) (err error)

	if sent == nil {
		panic("expected snapshot sent")
	}
	sendAck(ztunClient)

	// now remove the pod
	ztunnelServer := fixture.ztunServer
	errChan := make(chan error)
	go func() {
		errChan <- ztunnelServer.PodDeleted(ctx, uid)
	}()
	// read the msg to delete from ztunnel
	m, fds = readRequest(t, ztunClient)
	assert.Equal(t, len(fds), 0)

	globalIsTLS bool

	globalTLSCerts *certs.Manager

	globalHTTPServer        *xhttp.Server
	globalTCPOptions        xhttp.TCPOptions
	globalHTTPServerErrorCh = make(chan error)
	globalOSSignalCh        = make(chan os.Signal, 1)

	// global Trace system to send HTTP request/response
	// and Storage/OS calls info to registered listeners.
	globalTrace = pubsub.New[madmin.TraceInfo, madmin.TraceType](8)

)

// globalGrid is the global grid manager.
var globalGrid atomic.Pointer[grid.Manager]

// globalGridStart is a channel that will block startup of grid connections until closed.
var globalGridStart = make(chan struct{})

func initGlobalGrid(ctx context.Context, eps EndpointServerPools) error {
	hosts, local := eps.GridHosts()
	g, err := grid.NewManager(ctx, grid.ManagerOptions{