feat(jdk8): move files to new folder to avoid resources compiled.

jdkSrc/jdk8/jdk/internal/misc/TerminatingThreadLocal.java

@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.misc;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.IdentityHashMap;
+
+/**
+ * A thread-local variable that is notified when a thread terminates and
+ * it has been initialized in the terminating thread (even if it was
+ * initialized with a null value).
+ */
+public class TerminatingThreadLocal<T> extends ThreadLocal<T> {
+
+    @Override
+    public void set(T value) {
+        super.set(value);
+        register(this);
+    }
+
+    @Override
+    public void remove() {
+        super.remove();
+        unregister(this);
+    }
+
+    /**
+     * Invoked by a thread when terminating and this thread-local has an associated
+     * value for the terminating thread (even if that value is null), so that any
+     * native resources maintained by the value can be released.
+     *
+     * @param value current thread's value of this thread-local variable
+     *              (may be null but only if null value was explicitly initialized)
+     */
+    protected void threadTerminated(T value) {
+    }
+
+    // following methods and field are implementation details and should only be
+    // called from the corresponding code int Thread/ThreadLocal class.
+
+    /**
+     * Invokes the TerminatingThreadLocal's {@link #threadTerminated()} method
+     * on all instances registered in current thread.
+     */
+    public static void threadTerminated() {
+        for (TerminatingThreadLocal<?> ttl : REGISTRY.get()) {
+            ttl._threadTerminated();
+        }
+    }
+
+    private void _threadTerminated() { threadTerminated(get()); }
+
+    /**
+     * Register given TerminatingThreadLocal
+     *
+     * @param tl the ThreadLocal to register
+     */
+    public static void register(TerminatingThreadLocal<?> tl) {
+        REGISTRY.get().add(tl);
+    }
+
+    /**
+     * Unregister given TerminatingThreadLocal
+     *
+     * @param tl the ThreadLocal to unregister
+     */
+    private static void unregister(TerminatingThreadLocal<?> tl) {
+        REGISTRY.get().remove(tl);
+    }
+
+    /**
+     * a per-thread registry of TerminatingThreadLocal(s) that have been registered
+     * but later not unregistered in a particular thread.
+     */
+    public static final ThreadLocal<Collection<TerminatingThreadLocal<?>>> REGISTRY =
+        new ThreadLocal<Collection<TerminatingThreadLocal<?>>>() {
+            @Override
+            protected Collection<TerminatingThreadLocal<?>> initialValue() {
+                return Collections.newSetFromMap(new IdentityHashMap<>(4));
+            }
+        };
+}