/** {@inheritDoc} */
@Override
public boolean compareAndSet(T expVal, T newVal, S expStamp, S newStamp) throws GridException {
checkRemoved();
return CU.outTx(
internalCompareAndSet(
F0.equalTo(expVal),
wrapperClosure(newVal),
F0.equalTo(expStamp),
wrapperClosure(newStamp)),
ctx);
}
/**
* Synchronous sequence update operation. Will add given amount to the sequence value.
*
* @param l Increment amount.
* @param updateCall Cache call that will update sequence reservation count in accordance with l.
* @param updated If {@code true}, will return sequence value after update, otherwise will return
* sequence value prior to update.
* @return Sequence value.
* @throws GridException If update failed.
*/
private long internalUpdate(long l, @Nullable Callable<Long> updateCall, boolean updated)
throws GridException {
checkRemoved();
assert l > 0;
lock.lock();
try {
// If reserved range isn't exhausted.
if (locVal + l <= upBound) {
long curVal = locVal;
locVal += l;
return updated ? locVal : curVal;
}
} finally {
lock.unlock();
}
if (updateCall == null) updateCall = internalUpdate(l, updated);
while (true) {
if (updateGuard.compareAndSet(false, true)) {
try {
// This call must be outside lock.
return CU.outTx(updateCall, ctx);
} finally {
lock.lock();
try {
updateGuard.set(false);
cond.signalAll();
} finally {
lock.unlock();
}
}
} else {
lock.lock();
try {
while (locVal >= upBound && updateGuard.get()) {
try {
cond.await(500, MILLISECONDS);
} catch (InterruptedException e) {
throw new GridInterruptedException(e);
}
}
checkRemoved();
// If reserved range isn't exhausted.
if (locVal + l <= upBound) {
long curVal = locVal;
locVal += l;
return updated ? locVal : curVal;
}
} finally {
lock.unlock();
}
}
}
}
/** {@inheritDoc} */
@Override
public boolean compareAndSet(T expVal, T newVal) throws GridException {
checkRemoved();
return CU.outTx(internalCompareAndSet(wrapperPredicate(expVal), wrapperClosure(newVal)), ctx);
}
/** {@inheritDoc} */
@Override
public void set(T val) throws GridException {
checkRemoved();
CU.outTx(internalSet(val), ctx);
}
/** {@inheritDoc} */
@Override
public T get() throws GridException {
checkRemoved();
return CU.outTx(getCall, ctx);
}
/** {@inheritDoc} */
@Override
public T value() throws GridException {
checkRemoved();
return CU.outTx(valCall, ctx);
}
/** {@inheritDoc} */
@Override
public S stamp() throws GridException {
checkRemoved();
return CU.outTx(stampCall, ctx);
}
