8212178: Soft reference reclamation race in com.sun.xml.internal.stream.util.ThreadLocalBufferAllocator
Reviewed-by: rkennke, kbarrett, joehw
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2005, 2017, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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@ -39,15 +39,19 @@ import java.lang.ref.*;
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* @author Santiago PericasGeertsen
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*/
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public class ThreadLocalBufferAllocator {
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private static ThreadLocal<SoftReference<BufferAllocator>> tlba = new ThreadLocal<>();
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private static final ThreadLocal<SoftReference<BufferAllocator>> TL = new ThreadLocal<>();
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public static BufferAllocator getBufferAllocator() {
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SoftReference<BufferAllocator> bAllocatorRef = tlba.get();
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if (bAllocatorRef == null || bAllocatorRef.get() == null) {
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bAllocatorRef = new SoftReference<>(new BufferAllocator());
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tlba.set(bAllocatorRef);
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public static BufferAllocator getBufferAllocator() {
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BufferAllocator ba = null;
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SoftReference<BufferAllocator> sr = TL.get();
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if (sr != null) {
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ba = sr.get();
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}
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return bAllocatorRef.get();
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}
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if (ba == null) {
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ba = new BufferAllocator();
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sr = new SoftReference<>(ba);
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TL.set(sr);
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}
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return ba;
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}
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}
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