/*
* Do the real work of validateOwnershipInternal.
*/
boolean validateOwnershipInternal(
Long nodeId,
Locker locker,
LockType type,
boolean flushFromWaiters,
MemoryBudget mb,
int lockTableIndex) {
if (isOwnerInternal(nodeId, locker, type, lockTableIndex)) {
return true;
}
if (flushFromWaiters) {
Lock entry = lockTables[lockTableIndex].get(nodeId);
if (entry != null) {
entry.flushWaiter(locker, mb, lockTableIndex);
}
}
return false;
}
protected LockAttemptResult stealLockInternal(
Long nodeId, Locker locker, LockType lockType, MemoryBudget mb, int lockTableIndex)
throws DatabaseException {
Lock entry = lockTables[lockTableIndex].get(nodeId);
assert entry != null;
/*
* Note that flushWaiter may do nothing, because the lock may have been
* granted to our locker after the prior call to attemptLock and before
* the call to this method.
*/
entry.flushWaiter(locker, mb, lockTableIndex);
/* Remove all owners except for our owner. */
entry.stealLock(locker, mb, lockTableIndex);
/*
* The lock attempt normally succeeds, but can fail if the lock holder
* is non-preemptable.
*/
return attemptLockInternal(
nodeId, locker, lockType, false /*nonBlockingRequest*/, lockTableIndex);
}