}
      }
    } finally {
      if (interrupted) {
        Thread.currentThread().interrupt();
      }
    }
  }

  /**
   * Invokes {@code lock.}{@link Lock#tryLock(long, TimeUnit) tryLock(timeout, unit)}
   * uninterruptibly.
   *
   * @since 33.4.0 (but since 30.0 in the JRE flavor)
   */
  @J2ktIncompatible
  @GwtIncompatible // concurrency

pkg strings, func Clone(string) string
pkg strings, func Cut(string, string) (string, string, bool)
pkg strings, func Title //deprecated
pkg sync, method (*Mutex) TryLock() bool
pkg sync, method (*RWMutex) TryLock() bool
pkg sync, method (*RWMutex) TryRLock() bool
pkg syscall (freebsd-386), type SysProcAttr struct, Pdeathsig Signal
pkg syscall (freebsd-386-cgo), type SysProcAttr struct, Pdeathsig Signal

    assertFalse(lockA.tryLock());

    thread.releaseLockAndFinish();
    assertTrue(lockA.tryLock());
  }

  public void testReentrantWriteLock_tryLock() throws Exception {
    LockingThread thread = new LockingThread(writeLockA);
    thread.start();

    thread.waitUntilHoldingLock();
    assertFalse(writeLockA.tryLock());
    assertFalse(readLockA.tryLock());

    thread.releaseLockAndFinish();

    assertFalse(lockA.tryLock());

    thread.releaseLockAndFinish();
    assertTrue(lockA.tryLock());
  }

  public void testReentrantWriteLock_tryLock() throws Exception {
    LockingThread thread = new LockingThread(writeLockA);
    thread.start();

    thread.waitUntilHoldingLock();
    assertFalse(writeLockA.tryLock());
    assertFalse(readLockA.tryLock());

    thread.releaseLockAndFinish();

    ReentrantLock lock = this.lock;
    if (!fair && lock.tryLock()) {
      return true;
    }
    boolean interrupted = Thread.interrupted();
    try {
      long startTime = System.nanoTime();
      for (long remainingNanos = timeoutNanos; ; ) {
        try {
          return lock.tryLock(remainingNanos, NANOSECONDS);
        } catch (InterruptedException interrupt) {

// TryRead read up to len(p) bytes into p like Read but it is not blocking.
// If it has not succeeded to acquire the lock, it return 0 as n and ErrAcquireLock.
func (r *RingBuffer) TryRead(p []byte) (n int, err error) {
	ok := r.mu.TryLock()
	if !ok {
		return 0, ErrAcquireLock
	}
	defer r.mu.Unlock()
	if err := r.readErr(true); err != nil {
		return 0, err
	}
	if len(p) == 0 {
		return 0, r.readErr(true)
	}

            acquiredAggregatorLock = aggregator ? aggregatorLock.writeLock() : aggregatorLock.readLock();
            acquiredProjectLock = getProjectLock(session);
            if (!acquiredAggregatorLock.tryLock()) {
                Thread owner = aggregatorLock.getOwner();
                MojoDescriptor ownerMojo = owner != null ? mojos.get(owner) : null;

</p>

<p class="rule">
A successful call to <code>l.TryLock</code> (or <code>l.TryRLock</code>)
is equivalent to a call to <code>l.Lock</code> (or <code>l.RLock</code>).
An unsuccessful call has no synchronizing effect at all.
As far as the memory model is concerned,
<code>l.TryLock</code> (or <code>l.TryRLock</code>)
may be considered to be able to return false
even when the mutex <i>l</i> is unlocked.

		gridLogIf(m.ctx, err)
		m.closeLocked()
		return false
	}
}

func (m *muxClient) close() {
	if debugPrint {
		fmt.Println("closing outgoing mux", m.MuxID)
	}
	if !m.respMu.TryLock() {
		// Cancel before locking - will unblock any pending sends.
		if m.cancelFn != nil {
			m.cancelFn(context.Canceled)
		}
		// Wait for senders to release.
		m.respMu.Lock()
	}

    assertTrue(returnedBeforeTimeout);
    assertTimeNotPassed(stopwatch, LONG_DELAY_MS);
    assertInterrupted();
  }

  // Lock.tryLock() tests
  public void testTryLockTimeoutExceeded() {
    Stopwatch stopwatch = Stopwatch.createStarted();
    Lock lock = new ReentrantLock();
    Thread lockThread = acquireFor(lock, 5, SECONDS);