01: /*
02:
03: Derby - Class org.apache.derby.impl.services.locks.Control
04:
05: Licensed to the Apache Software Foundation (ASF) under one or more
06: contributor license agreements. See the NOTICE file distributed with
07: this work for additional information regarding copyright ownership.
08: The ASF licenses this file to you under the Apache License, Version 2.0
09: (the "License"); you may not use this file except in compliance with
10: the License. You may obtain a copy of the License at
11:
12: http://www.apache.org/licenses/LICENSE-2.0
13:
14: Unless required by applicable law or agreed to in writing, software
15: distributed under the License is distributed on an "AS IS" BASIS,
16: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17: See the License for the specific language governing permissions and
18: limitations under the License.
19:
20: */
21:
22: package org.apache.derby.impl.services.locks;
23:
24: import org.apache.derby.iapi.services.locks.Lockable;
25: import org.apache.derby.iapi.services.locks.Latch;
26: import java.util.List;
27:
28: public interface Control {
29:
30: public Lockable getLockable();
31:
32: public LockControl getLockControl();
33:
34: public Lock getLock(Object compatabilitySpace, Object qualifier);
35:
36: //EXCLUDE-START-lockdiag-
37: /**
38: Clone this lock for the lock table information.
39: Objects cloned will not be altered.
40: */
41: public Control shallowClone();
42:
43: //EXCLUDE-END-lockdiag-
44:
45: public ActiveLock firstWaiter();
46:
47: public boolean isEmpty();
48:
49: public boolean unlock(Latch lockInGroup, int unlockCount);
50:
51: public void addWaiters(java.util.Dictionary waiters);
52:
53: public Lock getFirstGrant();
54:
55: public List getGranted();
56:
57: public List getWaiting();
58:
59: public boolean isGrantable(boolean otherWaiters,
60: Object compatabilitySpace, Object qualifier);
61:
62: }
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