if (!status.ok()) {
    done(status);
    return;
  }
  if (auto st = stream_->BlockHostUntilDone(); !st.ok()) {
    done_event_.SetError(absl::InternalError(absl::StrFormat(
        "failed to synchronize send operation with a stream: %s",
        st.ToString())));
    return;
  }

  done_event_.SetStateConcrete();
  done(absl::OkStatus());
}

type Writer struct {
	// opts are the configuration options for this Writer
	opts Options

	// f is the currently open file used for appends.
	// Writes to f are only synchronized once Close() is called,
	// or when files are being rotated.
	f *os.File

	pw *xioutil.PipeWriter
	pr *xioutil.PipeReader
}

// Write writes p into the current file, rotating if necessary.

    private static final String BEACON_CLASS_NAME = "org.gradle.internal.installation.beacon.InstallationBeacon";

    private CurrentGradleInstallationLocator() {
    }

    public synchronized static CurrentGradleInstallation locate() {
        return locateViaClassLoader(CurrentGradleInstallationLocator.class.getClassLoader());
    }

        this(null);
    }

    BootstrapSecurityManager(URLClassLoader target) {
        this.target = target;
    }

    @Override
    public void checkPermission(Permission permission) {
        synchronized (this) {
            if (initialised) {
                return;
            }
            if (System.in == null) {
                // Still starting up
                return;
            }

                }
            }
        }, throttleMs, throttleMs, TimeUnit.MILLISECONDS);
    }

    @Override
    public void onOutput(OutputEvent newEvent) {
        synchronized (lock) {
            queue.add(newEvent);

            if (queue.size() == 10000) {
                renderNow();
                return;
            }

            if (newEvent instanceof InteractiveEvent) {

import (
	"sync/atomic"
)

// Once is an object that will perform exactly one action.
//
// A Once must not be copied after first use.
//
// In the terminology of [the Go memory model],
// the return from f “synchronizes before”
// the return from any call of once.Do(f).
//
// [the Go memory model]: https://go.dev/ref/mem
type Once struct {
	// done indicates whether the action has been performed.

                        Thread.sleep(JAR_GENERATION_TIME_MS)
                        touch(file)
                    }
                })

                synchronized(jarFiles) {
                    jarFiles << jarFile
                }
            }
        }

        concurrent.finished()

        then:
        triggeredJarFileGeneration.get() == 1

//
// In the terminology of [the Go memory model],
// the n'th call to [Mutex.Unlock] “synchronizes before” the m'th call to [Mutex.Lock]
// for any n < m.
// A successful call to [Mutex.TryLock] is equivalent to a call to Lock.
// A failed call to TryLock does not establish any “synchronizes before”
// relation at all.
//
// [the Go memory model]: https://go.dev/ref/mem
type Mutex struct {
	state int32

        CacheConfigurationsInternal cacheConfigurations = objectFactory.newInstance(DefaultCacheConfigurations.class, legacyCacheCleanupEnablement);
        if (gradleInternal.isRootBuild()) {
            cacheConfigurations.synchronize(persistentCacheConfigurations);
            persistentCacheConfigurations.setCleanupHasBeenConfigured(false);
        }
        return cacheConfigurations;
    }

  }

  static class DecoupledClassLoader extends URLClassLoader {

    public DecoupledClassLoader(URL[] urls) {
      super(urls);
    }

    @Override
    protected synchronized Class<?> loadClass(String name, boolean resolve)
        throws ClassNotFoundException {
      // Force Finalizer to load from this class loader, not its parent.
      if (name.equals(Finalizer.class.getName())) {