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;
} else {
try {
do {
wait();
} while (owner_ != null);
owner_ = caller;
holds_ = 1;
return;
} catch (InterruptedException ex) {
if (owner_ == null) notify();
throw ex;
}
}
}
}
public void lock() {
Thread caller = Thread.currentThread();
synchronized (this) {
if (owner_ == null) {
owner_ = caller;
holds_ = 1;
return;
} else if (caller == owner_) {
incHolds();
return;
} else {
boolean wasInterrupted = Thread.interrupted();
try {
while (true) {
try {
wait();
} catch (InterruptedException e) {
wasInterrupted = true;
// no need to notify; if we were signalled, we
// will act as signalled, ignoring the
// interruption
}
if (owner_ == null) {
owner_ = caller;
holds_ = 1;
return;
}
}
} finally {
if (wasInterrupted) Thread.currentThread().interrupt();
}
}
}
}
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 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 synchronized void unlock() {
if (Thread.currentThread() != owner_) throw new IllegalMonitorStateException("Not owner");
if (--holds_ == 0) {
owner_ = null;
notify();
}
}
public synchronized boolean recheck(WaitQueue.WaitNode node) {
Thread caller = Thread.currentThread();
if (owner_ == null) {
owner_ = caller;
holds_ = 1;
return true;
} else if (caller == owner_) {
incHolds();
return true;
}
wq_.insert(node);
return false;
}
public boolean tryLock() {
Thread caller = Thread.currentThread();
synchronized (this) {
if (owner_ == null) {
owner_ = caller;
holds_ = 1;
return true;
} else if (caller == owner_) {
incHolds();
return true;
}
}
return false;
}
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;
} else if (nanos <= 0) return false;
else {
long deadline = Utils.nanoTime() + nanos;
try {
for (; ; ) {
TimeUnit.NANOSECONDS.timedWait(this, nanos);
if (caller == owner_) {
incHolds();
return true;
} else if (owner_ == null) {
owner_ = caller;
holds_ = 1;
return true;
} else {
nanos = deadline - Utils.nanoTime();
if (nanos <= 0) return false;
}
}
} catch (InterruptedException ex) {
if (owner_ == null) notify();
throw ex;
}
}
}
}
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);
}
/**
* Returns a string identifying this lock, as well as its lock state. The state, in brackets,
* includes either the String "Unlocked" or the String "Locked by" followed by
* the {@link Thread#getName} of the owning thread.
*
* @return a string identifying this lock, as well as its lock state.
*/
public String toString() {
Thread o = getOwner();
return super.toString()
+ ((o == null) ? "[Unlocked]" : "[Locked by thread " + o.getName() + "]");
}
public synchronized boolean isHeldByCurrentThread() {
return holds_ > 0 && Thread.currentThread() == owner_;
}
