protected void await(boolean throwInterrupt) throws InterruptedException {
if (!signaled.get()) {
lock.acquired = false;
sendAwaitConditionRequest(lock.name, lock.owner);
boolean interrupted = false;
while (!signaled.get()) {
parker.set(Thread.currentThread());
LockSupport.park(this);
if (Thread.interrupted()) {
// If we were interrupted and haven't received a response yet then we try to
// clean up the lock request and throw the exception
if (!signaled.get()) {
sendDeleteAwaitConditionRequest(lock.name, lock.owner);
throw new InterruptedException();
}
// In the case that we were signaled and interrupted
// we want to return the signal but still interrupt
// our thread
interrupted = true;
}
}
if (interrupted) Thread.currentThread().interrupt();
}
// We set as if this signal was no released. This way if the
// condition is reused again, but the client condition isn't lost
// we won't think we were signaled immediately
signaled.set(false);
}
protected long await(long nanoSeconds) throws InterruptedException {
long target_nano = System.nanoTime() + nanoSeconds;
if (!signaled.get()) {
// We release the lock at the same time as waiting on the
// condition
lock.acquired = false;
sendAwaitConditionRequest(lock.name, lock.owner);
boolean interrupted = false;
while (!signaled.get()) {
long wait_nano = target_nano - System.nanoTime();
// If we waited max time break out
if (wait_nano > 0) {
parker.set(Thread.currentThread());
LockSupport.parkNanos(this, wait_nano);
if (Thread.interrupted()) {
// If we were interrupted and haven't received a response yet then we try to
// clean up the lock request and throw the exception
if (!signaled.get()) {
sendDeleteAwaitConditionRequest(lock.name, lock.owner);
throw new InterruptedException();
}
// In the case that we were signaled and interrupted
// we want to return the signal but still interrupt
// our thread
interrupted = true;
}
} else {
break;
}
}
if (interrupted) Thread.currentThread().interrupt();
}
// We set as if this signal was no released. This way if the
// condition is reused again, but the client condition isn't lost
// we won't think we were signaled immediately
// If we weren't signaled then delete our request
if (!signaled.getAndSet(false)) {
sendDeleteAwaitConditionRequest(lock.name, lock.owner);
}
return target_nano - System.nanoTime();
}
@Override
public void await() throws InterruptedException {
InterruptedException ex = null;
try {
await(true);
} catch (InterruptedException e) {
ex = e;
throw ex;
} finally {
lock.lock();
// If we are throwing an InterruptedException
// then clear the interrupt state as well.
if (ex != null) {
Thread.interrupted();
}
}
}
@Override
public long awaitNanos(long nanosTimeout) throws InterruptedException {
long beforeLock;
InterruptedException ex = null;
try {
beforeLock = await(nanosTimeout) + System.nanoTime();
} catch (InterruptedException e) {
ex = e;
throw ex;
} finally {
lock.lock();
// If we are throwing an InterruptedException
// then clear the interrupt state as well.
if (ex != null) {
Thread.interrupted();
}
}
return beforeLock - System.nanoTime();
}
