import java.util.NoSuchElementException;
import java.util.Set;
import javax.annotation.CheckForNull;

/**
 * A set comprising zero or more {@linkplain Range#isEmpty nonempty}, {@linkplain
 * Range#isConnected(Range) disconnected} ranges of type {@code C}.
 *
 * <p>Implementations that choose to support the {@link #add(Range)} operation are required to
 * ignore empty ranges and coalesce connected ranges. For example:
 *
 * <pre>{@code

        return i;
    }

    /*
     * state values
     * 0 - not connected
     * 1 - connecting
     * 2 - run connected
     * 3 - connected
     * 4 - error
     * 5 - disconnecting
     * 6 - disconnected/invalid
     */
    protected volatile int state = 0;

    protected String name = "Transport" + id++;
    private volatile Thread thread;
    private volatile TransportException te;

    protected void finalize () throws Throwable {
        if ( isConnected() && this.usageCount.get() != 0 ) {
            log.warn("Tree was not properly released");
        }
    }


    /**
     * 
     * @return whether the tree is connected
     */
    public boolean isConnected () {
        return this.tid != -1 && this.session.isConnected() && this.connectionState.get() == 2;
    }


    /**

	"net"
	"syscall"
	"time"
)

// CheckPortAvailability - check if given host and port is already in use.
// Note: The check method tries to listen on given port and closes it.
// It is possible to have a disconnected client in this tiny window of time.
func CheckPortAvailability(host, port string, opts TCPOptions) (err error) {
	lc := &net.ListenConfig{
		Control: func(network, address string, c syscall.RawConn) error {

        try ( SmbSessionImpl session = getSession() ) {
            if ( isConnected() ) {
                try ( SmbTransportImpl transport = session.getTransport() ) {
                    if ( transport.isDisconnected() || transport.getRemoteHostName() == null ) {
                        /*
                         * Tree/session thinks it is connected but transport disconnected
                         * under it, reset tree to reflect the truth.

import (
	"context"
	"net"
	"time"
)

// CheckPortAvailability - check if given host and port is already in use.
// Note: The check method tries to listen on given port and closes it.
// It is possible to have a disconnected client in this tiny window of time.
func CheckPortAvailability(host, port string, opts TCPOptions) (err error) {
	lc := &net.ListenConfig{}

	ctx, cancel := context.WithTimeout(context.Background(), time.Second)

     * @return whether the transport has the given capability
     * @throws SmbException
     */
    boolean hasCapability ( int cap ) throws SmbException;


    /**
     * @return whether the transport has been disconnected
     */
    boolean isDisconnected ();


    /**
     * @param hard
     * @param inuse
     * @return whether the connection was in use
     * @throws IOException
     */

## Retrying Requests

Sometimes connections fail: either a pooled connection was stale and disconnected, or the webserver itself couldn’t be reached. OkHttp will retry the request with a different route if one is available.

## [Calls](https://square.github.io/okhttp/4.x/okhttp/okhttp3/-call/)

			result.Concurrent = concurrency

			select {
			case ch <- result:
			case <-ctx.Done():
				return
			}
		}

		for {
			select {
			case <-ctx.Done():
				// If the client got disconnected stop the speedtest.
				return
			default:
			}

			sopts := speedTestOpts{
				objectSize:      opts.objectSize,
				concurrency:     concurrency,
				duration:        opts.duration,

	"sync"
	"time"

	"github.com/gobwas/ws"
	"github.com/gobwas/ws/wsutil"
)

// ErrDisconnected is returned when the connection to the remote has been lost during the call.
var ErrDisconnected = RemoteErr("remote disconnected")

const (
	// minBufferSize is the minimum buffer size.
	// Buffers below this is not reused.
	minBufferSize = 1 << 10

	// defaultBufferSize is the default buffer allocation size.
	defaultBufferSize = 4 << 10