public Lock transfer(
Long nodeId, Locker currentLocker, Locker destLocker, MemoryBudget mb, int lockTableIndex)
throws DatabaseException {
Lock newLock = new LockImpl(new LockInfo(this.locker, this.lockType));
return newLock.transfer(nodeId, currentLocker, destLocker, mb, lockTableIndex);
}
/** Do the real work of transfer */
void transferInternal(
long nodeId, Locker owningLocker, Locker destLocker, boolean demoteToRead, int lockTableIndex)
throws DatabaseException {
Map<Long, Lock> lockTable = lockTables[lockTableIndex];
Lock useLock = lockTable.get(Long.valueOf(nodeId));
assert useLock != null : "Transfer, lock " + nodeId + " was null";
if (demoteToRead) {
useLock.demote(owningLocker);
}
Lock newLock = useLock.transfer(nodeId, owningLocker, destLocker, memoryBudget, lockTableIndex);
if (newLock != useLock) {
/* The lock mutated from ThinLockImpl to LockImpl. */
lockTable.put(nodeId, newLock);
/* We still have the overhead of the hashtable (locktable). */
memoryBudget.updateLockMemoryUsage(THINLOCK_MUTATE_OVERHEAD, lockTableIndex);
}
owningLocker.removeLock(nodeId);
}