java me学习_锁定JavaME

我需要一个简单的锁，JavaME的超时(concurrent.lock的backport需要完整的Java 1.3) .

如果其他人已经为JavaME发布了经过测试的锁定代码，我宁愿使用它 .

锁定是众所周知的困难，所以我想我会问以下代码是否理智：

public class TimedLock {

private volatile Thread holder = null;

private Vector waiters = new Vector();

public void lock(long ms) {

synchronized (this) {

if (holder == null) {

holder = Thread.currentThread();

return;

}

}

waiters.addElement(Thread.currentThread());

try {

Thread.sleep(ms);

throw new RuntimeException("timeout while waiting for lock");

} catch (InterruptedException e) {

return;

}

}

public synchronized void unlock() {

if (holder != Thread.currentThread()) {

throw new RuntimeException("attempting to release unheld lock");

}

// if there is at least one waiter, wake it

if (waiters.size() > 0) {

holder = (Thread) waiters.elementAt(waiters.size() - 1);

waiters.removeElementAt(waiters.size() - 1);

holder.interrupt();

} else {

holder = null;

}

}

}