*       argument.
   * </ul>
   */
  volatile @Nullable Object valueField;

  /** All listeners. */
  volatile @Nullable Listener listenersField;

  /** All waiting threads. */
  volatile @Nullable Waiter waitersField;

  /** Non-volatile write of the thread to the {@link Waiter#thread} field. */
  private static void putThread(Waiter waiter, Thread newValue) {

            destoryTimer.schedule(task, commandTimeout);
            ist.start();

            if (logger.isDebugEnabled()) {
                logger.debug("Waiting for {}.", getName());
            }

            if (p.waitFor(commandTimeout + commandDestroyTimeout, TimeUnit.MILLISECONDS)) {
                if (task.isExecuted()) {

    @SuppressWarnings("unused") // https://errorprone.info/bugpattern/FutureReturnValueIgnored
    Future<?> possiblyIgnoredError = threadPool.submit(new Interrupter(currentThread()));
    try {
      // if waiting works, this should get stuck
      Queues.drain(q, new ArrayList<>(), 1, MAX_VALUE, NANOSECONDS);
      fail();
    } catch (InterruptedException expected) {

<font color="#4E9A06">INFO</font>:     Started server process [<font color="#06989A">2265873</font>]
<font color="#4E9A06">INFO</font>:     Waiting for application startup.
<font color="#4E9A06">INFO</font>:     Application startup complete.
```

</div>

У консолі буде рядок приблизно такого змісту:

```hl_lines="4"

<font color="#4E9A06">INFO</font>:     Started server process [<font color="#06989A">2265873</font>]
<font color="#4E9A06">INFO</font>:     Waiting for application startup.
<font color="#4E9A06">INFO</font>:     Application startup complete.
```

</div>

在輸出中，有一列類似於：

```hl_lines="4"

<span style="color: green;">INFO</span>:     Started reloader process [28720]
<span style="color: green;">INFO</span>:     Started server process [28722]
<span style="color: green;">INFO</span>:     Waiting for application startup.
<span style="color: green;">INFO</span>:     Application startup complete.
```

</div>

/// note | 참고

`uvicorn main:app` 명령은 다음을 의미합니다:

* `main`: 파일 `main.py` (파이썬 "모듈").

		return madmin.ServiceActionRestart
	case stopCmd:
		return madmin.ServiceActionStop
	}
	return madmin.ServiceActionRestart
}

// testServiceSignalReceiver - Helper function that simulates a
// go-routine waiting on service signal.
func testServiceSignalReceiver(cmd cmdType, t *testing.T) {
	expectedCmd := cmd.toServiceSignal()
	serviceCmd := <-globalServiceSignalCh
	if serviceCmd != expectedCmd {

<span style="color: green;">INFO</span>:     Started reloader process [28720]
<span style="color: green;">INFO</span>:     Started server process [28722]
<span style="color: green;">INFO</span>:     Waiting for application startup.
<span style="color: green;">INFO</span>:     Application startup complete.
```

</div>

/// note

La commande `uvicorn main:app` fait référence à :

    /**
     * Transaction subcommand for peeking data from a named pipe
     */
    public static final byte TRANS_PEEK_NAMED_PIPE = (byte) 0x23;
    /**
     * Transaction subcommand for waiting on a named pipe
     */
    public static final byte TRANS_WAIT_NAMED_PIPE = (byte) 0x53;
    /**
     * Transaction subcommand for calling a named pipe
     */

				// No cache found, no entries found.
				return entries, io.EOF
			}
			if c.status == scanStateError || c.status == scanStateNone {
				o.ID = ""
				o.Create = false
				o.debugln("scan status", c.status, " - waiting a roundtrip to create")
			} else {
				// Continue listing
				o.ID = c.id
				go c.keepAlive(ctx, rpc)
			}
		}
	}

	if o.ID != "" && !o.Transient {