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1 package treecms.tree.util;
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2
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3 import java.util.concurrent.locks.ReentrantLock;
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4
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5 public class LockableReference<V>
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6 {
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7 private volatile V m_ref;
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8 private volatile ReentrantLock m_lock;
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9
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10 public LockableReference(V _ref)
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11 {
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12 m_ref = _ref;
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13 m_lock = new ReentrantLock();
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14 }
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15
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16 public V get()
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17 {
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18 m_lock.lock();
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19 V ref = m_ref;
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20 m_lock.unlock();
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21 return ref;
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22 }
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23
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24 public void put(V _ref)
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25 {
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26 m_lock.lock();
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27 m_ref = _ref;
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28 m_lock.unlock();
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29 }
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30
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31 public void lock()
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32 {
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33 m_lock.lock();
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34 }
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35
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36 public void unlock()
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37 {
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38 m_lock.unlock();
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39 }
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40 }
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