import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**

    }
    final ReentrantLock lock = this.lock;
    lock.lock();

    boolean satisfied = false;
    try {
      return satisfied = guard.isSatisfied();
    } finally {
      if (!satisfied) {
        lock.unlock();
      }
    }
  }

  /**
   * Enters this monitor if the guard is satisfied. Blocks at most the given time acquiring the
   * lock, but does not wait for the guard to be satisfied.

     * released by calling {@link FileLock#close()}. This method blocks until the lock can be acquired.
     * <p>
     * Enable other processes to request access to the provided lock. Provided action runs when the lock access request is received
     * (it means that the lock is contended).
     *
     * @param target The file to be locked.
     * @param options The lock options.

	"time"
)

// A LRWMutex is a mutual exclusion lock with timeouts.
type LRWMutex struct {
	id          string
	source      string
	isWriteLock bool
	ref         int
	mu          sync.Mutex // Mutex to prevent multiple simultaneous locks
}

// NewLRWMutex - initializes a new lsync RW mutex.
func NewLRWMutex() *LRWMutex {
	return &LRWMutex{}
}

// Lock holds a write lock on lm.
//

  outFinished: Boolean,
  inFinished: Boolean,
  headers: Headers?,
) {
  internal val lock: ReentrantLock = ReentrantLock()
  val condition: Condition = lock.newCondition()

  // Internal state is guarded by [lock]. No long-running or potentially blocking operations are
  // performed while the lock is held.

  /** The bytes consumed and acknowledged by the stream. */
  val readBytes: WindowCounter = WindowCounter(id)

      mu->lock_shared();
      variables[i]->set_shared_lock_held();
    } else {
      VLOG(4) << "Acquiring lock for variable "
              << reinterpret_cast<void*>(variable);
      mu->lock();
      variables[i]->set_lock_held();
    }
    prev = mu;
  }
  VLOG(4) << "Finished acquiring variable locks.";
  return absl::OkStatus();
}

Status LockVariables(absl::Span<VariableInfo> variables) {

import java.io.File;
import java.io.IOException;
import java.time.Duration;
import java.util.concurrent.locks.Lock;

class ExpectMethod implements ResourceHandler, BuildableExpectedRequest, ResourceExpectation, BlockingRequest {
    private final String method;
    private final String path;
    private final Duration timeout;
    private final Lock lock;

    private ResponseProducer producer = new ResponseProducer() {
        @Override

	// Once runtime·park() has unlocked the last lock, another M makes
	// the G that calls select runnable again and schedules it for execution.
	// When the G runs on another M, it locks all the locks and frees sel.
	// Now if the first M touches sel, it will access freed memory.
	for i := len(lockorder) - 1; i >= 0; i-- {
		c := scases[lockorder[i]].c
		if i > 0 && c == scases[lockorder[i-1]].c {

        ObjectConnection getConnection() {
            lock.lock()
            try {
                while (connection == null) {
                    condition.await()
                }
                return connection
            } finally {
                lock.unlock()
            }
        }

        @Override
        void stop() {
            lock.lock()
            try {

func (m *metacacheManager) deleteBucketCache(bucket string) {
	m.init.Do(m.initManager)
	m.mu.Lock()
	b, ok := m.buckets[bucket]
	if !ok {
		m.mu.Unlock()
		return
	}
	delete(m.buckets, bucket)
	m.mu.Unlock()

	// Since deletes may take some time we try to do it without
	// holding lock to m all the time.
	b.mu.Lock()
	defer b.mu.Unlock()
	for k, v := range b.caches {