条件变量的await()释放锁吗?

譬如下面的两个条件变量 isEmpty和isFull
当调用他们的await()时,lock.lock()上的锁会被释放吗?

这里有3个对象,一个i哦是lock,一个是isEmpty,一个是isFull
上锁的对象是lock,而不是isEmpty或者isFull
那isFull或者isEmpty释放的锁确实lock上的?

private volatile boolean usedData = true;//mutex for data
private final Lock lock = new ReentrantLock();
private final Condition isEmpty = lock.newCondition();
private final Condition isFull = lock.newCondition();

public void setData(int data) throws InterruptedException {
    lock.lock();
    try {
        while(!usedData) {//wait for data to be used
            isEmpty.await();
        }
        this.data = data;
        isFull.signal();//broadcast that the data is now full.
        usedData = false;//tell others I created new data.          
    }finally {
        lock.unlock();//interrupt or not, release lock
    }       
}
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