/**
* Tests if a the sequence number associated with a particular block location has not changed.
*
* @param x the x coordinate
* @param y the y coordinate
* @param z the z coordinate
* @param expected the expected sequence number
* @return true if the sequence number has not changed and expected is not
* DatatableSequenceNumber.ATOMIC
*/
public final boolean testSequence(int x, int y, int z, int expected) {
if (expected == DatatableSequenceNumber.ATOMIC) {
return false;
}
checkCompressing();
int index = getIndex(x, y, z);
int spins = 0;
boolean interrupted = false;
try {
if (spins++ > SPINS) {
interrupted |= atomicWait();
}
checkCompressing();
int blockId = blockIds.get(index);
return auxStore.isReserved(blockId) && auxStore.testSequence(blockId, expected);
} finally {
if (interrupted) {
Thread.currentThread().interrupt();
}
}
}
