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SnappyData store based off Pivotal GemFireXD
/*
* Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you
* may not use this file except in compliance with the License. You
* may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License. See accompanying
* LICENSE file.
*/
package com.gemstone.gemfire.internal.cache;
// DO NOT modify this class. It was generated from LeafRegionEntry.cpp
import java.util.concurrent.atomic.AtomicLongFieldUpdater;
import com.gemstone.gemfire.internal.concurrent.AtomicUpdaterFactory;
import com.gemstone.gemfire.internal.offheap.OffHeapRegionEntryHelper;
import com.gemstone.gemfire.internal.offheap.annotations.Released;
import com.gemstone.gemfire.internal.offheap.annotations.Retained;
import com.gemstone.gemfire.internal.offheap.annotations.Unretained;
import com.gemstone.gemfire.internal.concurrent.CustomEntryConcurrentHashMap.HashEntry;
// macros whose definition changes this class:
// disk: DISK
// lru: LRU
// stats: STATS
// versioned: VERSIONED
// offheap: OFFHEAP
// rowlocation: ROWLOCATION
// local: LOCAL
// bucket: BUCKET
// package: PKG
/**
* Do not modify this class. It was generated.
* Instead modify LeafRegionEntry.cpp and then run
* bin/generateRegionEntryClasses.sh from the directory
* that contains your build.xml.
*/
@SuppressWarnings("serial")
public class VMThinRegionEntryOffHeap extends VMThinRegionEntry
implements OffHeapRegionEntry
{
public VMThinRegionEntryOffHeap (RegionEntryContext context, Object key,
@Retained
Object value
) {
super(context,
value
);
// DO NOT modify this class. It was generated from LeafRegionEntry.cpp
this.key = key;
}
// DO NOT modify this class. It was generated from LeafRegionEntry.cpp
// common code
protected int hash;
private HashEntry next;
@SuppressWarnings("unused")
private volatile long lastModified;
private static final AtomicLongFieldUpdater lastModifiedUpdater
= AtomicUpdaterFactory.newLongFieldUpdater(VMThinRegionEntryOffHeap.class, "lastModified");
protected long getlastModifiedField() {
return lastModifiedUpdater.get(this);
}
protected boolean compareAndSetLastModifiedField(long expectedValue, long newValue) {
return lastModifiedUpdater.compareAndSet(this, expectedValue, newValue);
}
/**
* @see HashEntry#getEntryHash()
*/
@Override
public final int getEntryHash() {
return this.hash;
}
@Override
protected void setEntryHash(int v) {
this.hash = v;
}
/**
* @see HashEntry#getNextEntry()
*/
@Override
public final HashEntry getNextEntry() {
return this.next;
}
/**
* @see HashEntry#setNextEntry
*/
@Override
public final void setNextEntry(final HashEntry n) {
this.next = n;
}
// DO NOT modify this class. It was generated from LeafRegionEntry.cpp
// key code
private Object key;
@Override
public final Object getRawKey() {
return this.key;
}
@Override
protected void _setRawKey(Object key) {
this.key = key;
}
/**
* All access done using ohAddrUpdater so it is used even though the compiler can not tell it is.
*/
@Retained @Released private volatile long ohAddress;
/**
* I needed to add this because I wanted clear to call setValue which normally can only be called while the re is synced.
* But if I sync in that code it causes a lock ordering deadlock with the disk regions because they also get a rw lock in clear.
* Some hardware platforms do not support CAS on a long. If gemfire is run on one of those the AtomicLongFieldUpdater does a sync
* on the re and we will once again be deadlocked.
* I don't know if we support any of the hardware platforms that do not have a 64bit CAS. If we do then we can expect deadlocks
* on disk regions.
*/
private final static AtomicLongFieldUpdater ohAddrUpdater =
AtomicUpdaterFactory.newLongFieldUpdater(VMThinRegionEntryOffHeap.class, "ohAddress");
// DO NOT modify this class. It was generated from LeafRegionEntry.cpp
@Override
public Token getValueAsToken() {
return OffHeapRegionEntryHelper.getValueAsToken(this);
}
@Override
@Unretained
protected Object getValueField() {
return OffHeapRegionEntryHelper._getValue(this);
}
@Override
protected void setValueField(@Unretained Object v) {
OffHeapRegionEntryHelper.setValue(this, v);
}
@Override
@Retained
public Object _getValueRetain(RegionEntryContext context, boolean decompress) {
return OffHeapRegionEntryHelper._getValueRetain(this, decompress);
}
@Override
public long getAddress() {
return ohAddrUpdater.get(this);
}
@Override
public boolean setAddress(long expectedAddr, long newAddr) {
return ohAddrUpdater.compareAndSet(this, expectedAddr, newAddr);
}
@Override
@Released
public void release() {
OffHeapRegionEntryHelper.releaseEntry(this);
}
// DO NOT modify this class. It was generated from LeafRegionEntry.cpp
private static RegionEntryFactory factory = new RegionEntryFactory() {
public final RegionEntry createEntry(RegionEntryContext context, Object key, Object value) {
return new VMThinRegionEntryOffHeap(context, key, value);
}
public final Class getEntryClass() {
return VMThinRegionEntryOffHeap.class;
}
public RegionEntryFactory makeVersioned() {
return VMThinRegionEntryOffHeap.getEntryFactory();
}
@Override
public RegionEntryFactory makeOnHeap() {
return VMThinRegionEntryHeap.getEntryFactory();
}
};
public static RegionEntryFactory getEntryFactory() {
return factory;
}
// DO NOT modify this class. It was generated from LeafRegionEntry.cpp
}