@Override
        public void run() {
        }

        public void await() {
            try {
                latch.await();
            } catch (InterruptedException e) {
                throw UncheckedException.throwAsUncheckedException(e);
            }
        }

        public void completed() {
            latch.countDown();
        }
    }

                }
            }

            leaseAcquiredLatch.await()

            // release the first queue to submit its work
            synchronized (release) {
                release.notify()
            }

            // Wait for all worker leases to be utilized running work
            runningLatch.await()
            fullyUtilizedLatch.countDown()
        }

        where:

# 동시성과 async / await

*경로 작동 함수*에서의 `async def` 문법에 대한 세부사항과 비동기 코드, 동시성 및 병렬성에 대한 배경

## 바쁘신 경우

<strong>요약</strong>

다음과 같이 `await`를 사용해 호출하는 제3의 라이브러리를 사용하는 경우:

```Python
results = await some_library()
```

다음처럼 *경로 작동 함수*를 `async def`를 사용해 선언하십시오:

```Python hl_lines="2"
@app.get('/')
async def read_results():
    results = await some_library()
    return results
```

!!! note "참고"

                        case Idle:
                        case Busy:
                            LOGGER.debug("daemon is running. Sleeping until state changes.");
                            condition.await();
                            break;
                        case Canceled:
                            LOGGER.debug("cancel requested.");
                            DaemonStopState state = cancelNow();

        def threads = 5
        def startSignal = new CountDownLatch(1)
        def doneSignal = new CountDownLatch(threads)

        when:
        threads.times {
            new Thread({
                startSignal.await()
                def spawnedProject = ProjectBuilder.builder().build()
                try {
                    doneSignal.countDown()
                } finally {

            workItems.add(workerExecutor.submitWork(workActionClass, parameterAction, spec, workerFactory));
        }

        @Override
        public void await() throws WorkerExecutionException {
            workerExecutor.await(workItems);
        }
    }

```Python hl_lines="9-10"
{!../../../docs_src/async_tests/test_main.py!}
```

Das ist das Äquivalent zu:

```Python
response = client.get('/')
```

... welches wir verwendet haben, um unsere Requests mit dem `TestClient` zu machen.

!!! tip "Tipp"

* `read(size)`：按指定数量的字节或字符（`size` (`int`)）读取文件内容；
* `seek(offset)`：移动至文件 `offset` （`int`）字节处的位置；
    * 例如，`await myfile.seek(0) ` 移动到文件开头；
    * 执行 `await myfile.read()` 后，需再次读取已读取内容时，这种方法特别好用；
* `close()`：关闭文件。

因为上述方法都是 `async` 方法，要搭配「await」使用。

例如，在 `async` *路径操作函数* 内，要用以下方式读取文件内容：

```Python
contents = await myfile.read()
```

在普通 `def` *路径操作函数*  内，则可以直接访问 `UploadFile.file`，例如：

```Python

 * Object x = new MyClass() {
 *   ...
 *   protected void finalize() { latch.countDown(); ... }
 * };
 * x = null;  // Hint to the JIT that x is stack-unreachable
 * GcFinalization.await(latch);
 * }</pre>
 *
 * <p>Here's an example that uses a user-defined finalization predicate:
 *
 * <pre>{@code
 * final WeakHashMap<Object, Object> map = new WeakHashMap<>();
 * map.put(new Object(), Boolean.TRUE);

        coordinator.stop()

        then: "stops"
        stopped

        when: "requested again"
        coordinator.stop()

        then:
        stopped
        0 * _._
    }

    def "await idle timeout does nothing when already stopped"() {
        given:
        coordinator.stop()

        when:
        def result = coordinator.awaitStop()

        then:
        stopped