func (t *apiConfig) getRequestsPool() chan struct{} {
	t.mu.RLock()
	defer t.mu.RUnlock()

	if t.requestsPool == nil {
		return nil
	}

	return t.requestsPool
}

// maxClients throttles the S3 API calls
func maxClients(f http.HandlerFunc) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		globalHTTPStats.incS3RequestsIncoming()

		if r.Header.Get(globalObjectPerfUserMetadata) == "" {

	noGZS3HFlag = 1 << iota

	// when provided, enables only tracing of headers. Otherwise, both headers
	// and body are traced.
	traceHdrsS3HFlag

	// when provided, disables throttling via the `maxClients` middleware.
	noThrottleS3HFlag
)

func (h s3HFlag) has(flag s3HFlag) bool {
	// Use bitwise-AND and check if the result is non-zero.
	return h&flag != 0
}