including <a href="/pkg/sync/#Cond">condition variables</a>,
<a href="/pkg/sync/#Map">lock-free maps</a>,
<a href="/pkg/sync/#Pool">allocation pools</a>,
and
<a href="/pkg/sync/#WaitGroup">wait groups</a>.
The documentation for each of these specifies the guarantees it
makes concerning synchronization.
</p>

<p>
Other packages that provide synchronization abstractions

	infos, err := globalSiteReplicationSys.GetClusterInfo(ctx)
	if err != nil {
		return results, err
	}
	var wg sync.WaitGroup
	var resultsMu sync.RWMutex
	for _, info := range infos.Sites {
		info := info
		// will call siteNetperf, means call others's adminAPISiteReplicationDevNull
		if globalDeploymentID() == info.DeploymentID {

	ch <- c.desc
}

// Collect is called by the Prometheus registry when collecting metrics.
func (c *minioBucketCollector) Collect(out chan<- prometheus.Metric) {
	var wg sync.WaitGroup
	publish := func(in <-chan MetricV2) {
		defer wg.Done()
		for metric := range in {
			labels, values := getOrderedLabelValueArrays(metric.VariableLabels)
			collectMetric(metric, labels, values, "bucket", out)

	var traceOpts madmin.ServiceTraceOpts
	err := json.Unmarshal(payload, &traceOpts)
	if err != nil {
		return grid.NewRemoteErr(err)
	}
	var wg sync.WaitGroup

	// Trace Publisher uses nonblocking publish and hence does not wait for slow subscribers.
	// Use buffered channel to take care of burst sends or slow w.Write()

	}

	var wg sync.WaitGroup
	// Remove buckets that are in DNS for this server, but aren't local
	for bucket, records := range dnsBuckets {
		if bucketsSet.Contains(bucket) {
			continue
		}

	// The purpose this block is not to check for correctness of functionality
	// Run the test with -race flag to utilize this
	var wg sync.WaitGroup
	for i := 0; i < testConcurrencyLevel; i++ {
		wg.Add(1)
		go func() {
			defer wg.Done()
			// HTTP request to create the bucket.

	testUploads := struct {
		sync.Mutex
		uploads []string
	}{}

	objectName := "test-object-new-multipart-parallel"
	var wg sync.WaitGroup
	for i := 0; i < 10; i++ {
		wg.Add(1)
		// Initiate NewMultipart upload on the same object 10 times concurrrently.
		go func() {
			defer wg.Done()
			rec := httptest.NewRecorder()

pkg sync, method (*RWMutex) RLock()
pkg sync, method (*RWMutex) RLocker() Locker
pkg sync, method (*RWMutex) RUnlock()
pkg sync, method (*RWMutex) Unlock()
pkg sync, method (*WaitGroup) Add(int)
pkg sync, method (*WaitGroup) Done()
pkg sync, method (*WaitGroup) Wait()
pkg sync, type Cond struct
pkg sync, type Cond struct, L Locker
pkg sync, type Locker interface { Lock, Unlock }
pkg sync, type Locker interface, Lock()