public void unlock() {
Thread caller = Thread.currentThread();
for (; ; ) {
WaitQueue.WaitNode w = getSignallee(caller);
if (w == null) return; // no one to signal
if (w.signal(this)) return; // notify if still waiting, else skip
}
}
public void lock() {
Thread caller = Thread.currentThread();
synchronized (this) {
if (owner_ == null) {
owner_ = caller;
holds_ = 1;
return;
} else if (caller == owner_) {
incHolds();
return;
}
}
WaitQueue.WaitNode n = new WaitQueue.WaitNode();
n.doWaitUninterruptibly(this);
}
public boolean tryLock(long nanos) throws InterruptedException {
if (Thread.interrupted()) throw new InterruptedException();
Thread caller = Thread.currentThread();
synchronized (this) {
if (owner_ == null) {
owner_ = caller;
holds_ = 1;
return true;
} else if (caller == owner_) {
incHolds();
return true;
}
}
WaitQueue.WaitNode n = new WaitQueue.WaitNode();
return n.doTimedWait(this, nanos);
}
public void lockInterruptibly() throws InterruptedException {
if (Thread.interrupted()) throw new InterruptedException();
Thread caller = Thread.currentThread();
synchronized (this) {
if (owner_ == null) {
owner_ = caller;
holds_ = 1;
return;
} else if (caller == owner_) {
incHolds();
return;
}
}
WaitQueue.WaitNode n = new WaitQueue.WaitNode();
n.doWait(this);
}
public synchronized void takeOver(WaitQueue.WaitNode node) {
// assert (holds_ == 1 && owner_ == Thread.currentThread()
owner_ = node.getOwner();
}