* Release a send region back to the pool
     *
     * @param region memory region to release
     */
    public void releaseSendRegion(RdmaMemoryRegion region) {
        if (region.getSize() == sendBufferSize && availableSendRegions.size() < initialSendBuffers * 2) {
            availableSendRegions.offer(region);
        } else {
            region.close();
            totalReleased.incrementAndGet();
        }
    }

        RdmaMemoryRegion region = bufferManager.getSendRegion(1024);
        assertNotNull(region, "Send region should not be null");
        assertTrue(region.getSize() >= 1024, "Region should be at least requested size");
        assertTrue(region.hasAccess(RdmaAccess.LOCAL_READ), "Should have local read access");
        assertTrue(region.hasAccess(RdmaAccess.REMOTE_READ), "Should have remote read access");

}

// Validate - checks whether queue has valid values or not.
func (q Queue) Validate(region string, targetList *TargetList) error {
	if q.ARN.region == "" {
		if !targetList.Exists(q.ARN.TargetID) {
			return &ErrARNNotFound{q.ARN}
		}
		return nil
	}

	if region != "" && q.ARN.region != region {
		return &ErrUnknownRegion{q.ARN.region}
	}

	if !targetList.Exists(q.ARN.TargetID) {
		return &ErrARNNotFound{q.ARN}

	now := UTCNow()
	credentialTemplate := "%s/%s/%s/s3/aws4_request"

	region := globalSite.Region()
	accessKeyID := globalActiveCred.AccessKey
	testCases := []struct {
		queryParams map[string]string
		headers     map[string]string
		region      string
		expected    APIErrorCode
	}{
		// (0) Should error without a set URL query.
		{
			region:   globalMinioDefaultRegion,
			expected: ErrInvalidQueryParams,
		},

    /** Local key for accessing this memory region */
    protected final int localKey;
    /** Remote key for remote RDMA access */
    protected final int remoteKey;
    /** Virtual address of the memory region */
    protected final long address;
    /** Flag indicating if the memory region is still valid */
    protected volatile boolean valid;

    /**
     * Create new RDMA memory region
     *

	}
	return newAPIEndpoints
}

// Prints common server startup message. Prints credential, region and browser access.
func printServerCommonMsg(apiEndpoints []string) {
	// Get saved credentials.
	cred := globalActiveCred

	// Get saved region.
	region := globalSite.Region()

	apiEndpointStr := strings.TrimSpace(strings.Join(apiEndpoints, "  "))
	// Colorize the message and print.

// returns ErrNone if the signature matches.
func doesPolicySignatureV4Match(formValues http.Header) (auth.Credentials, APIErrorCode) {
	// Server region.
	region := globalSite.Region()

	// Parse credential tag.
	credHeader, s3Err := parseCredentialHeader("Credential="+formValues.Get(xhttp.AmzCredential), region, serviceS3)
	if s3Err != ErrNone {
		return auth.Credentials{}, s3Err
	}

	r := &http.Request{Header: formValues}

	case authTypeSigned, authTypePresigned:
		region := globalSite.Region()
		switch action {
		case policy.GetBucketLocationAction, policy.ListAllMyBucketsAction:
			region = ""
		}
		if s3Err = isReqAuthenticated(ctx, r, region, serviceS3); s3Err != ErrNone {
			return s3Err
		}
		cred, owner, s3Err = getReqAccessKeyV4(r, region, serviceS3)
	}
	if s3Err != ErrNone {
		return s3Err
	}

        // } catch (Exception e) {
        //     throw new RuntimeException("Failed to register memory region", e);
        // }

        this.memoryRegister = new Object(); // Placeholder

        log.debug("DiSNI memory region registered, size: {}", buffer.remaining());
    }

    @Override
    public void invalidate() {
        if (valid && memoryRegister != null) {

	if err = newTestConfig(globalMinioDefaultRegion, objLayer); err != nil {
		t.Fatalf("Init Test config failed")
	}

	if globalSite.Region() != globalMinioDefaultRegion {
		t.Errorf("Expecting region `us-east-1` found %s", globalSite.Region())
	}

	// Set new region and verify.
	config.SetRegion(globalServerConfig, "us-west-1")
	site, err := config.LookupSite(
		globalServerConfig[config.SiteSubSys][config.Default],