170 lines
6.5 KiB
Java
170 lines
6.5 KiB
Java
package com.google.common.base;
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import java.io.Closeable;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.lang.ref.PhantomReference;
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import java.lang.ref.Reference;
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import java.lang.ref.ReferenceQueue;
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import java.lang.reflect.Method;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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/* loaded from: classes2.dex */
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public class FinalizableReferenceQueue implements Closeable {
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private static final String FINALIZER_CLASS_NAME = "com.google.common.base.internal.Finalizer";
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private static final Logger logger = Logger.getLogger(FinalizableReferenceQueue.class.getName());
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private static final Method startFinalizer = getStartFinalizer(loadFinalizer(new SystemLoader(), new DecoupledLoader(), new DirectLoader()));
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final PhantomReference<Object> frqRef;
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final ReferenceQueue<Object> queue;
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final boolean threadStarted;
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/* JADX INFO: Access modifiers changed from: package-private */
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/* loaded from: classes2.dex */
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public interface FinalizerLoader {
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Class<?> loadFinalizer();
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}
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public FinalizableReferenceQueue() {
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ReferenceQueue<Object> referenceQueue = new ReferenceQueue<>();
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this.queue = referenceQueue;
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PhantomReference<Object> phantomReference = new PhantomReference<>(this, referenceQueue);
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this.frqRef = phantomReference;
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boolean z = false;
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try {
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startFinalizer.invoke(null, FinalizableReference.class, referenceQueue, phantomReference);
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z = true;
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} catch (IllegalAccessException e) {
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throw new AssertionError(e);
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} catch (Throwable th) {
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logger.log(Level.INFO, "Failed to start reference finalizer thread. Reference cleanup will only occur when new references are created.", th);
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}
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this.threadStarted = z;
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}
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@Override // java.io.Closeable, java.lang.AutoCloseable
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public void close() {
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this.frqRef.enqueue();
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cleanUp();
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}
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/* JADX INFO: Access modifiers changed from: package-private */
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/* JADX WARN: Multi-variable type inference failed */
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public void cleanUp() {
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if (this.threadStarted) {
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return;
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}
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while (true) {
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Reference<? extends Object> poll = this.queue.poll();
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if (poll == 0) {
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return;
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}
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poll.clear();
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try {
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((FinalizableReference) poll).finalizeReferent();
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} catch (Throwable th) {
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logger.log(Level.SEVERE, "Error cleaning up after reference.", th);
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}
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}
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}
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private static Class<?> loadFinalizer(FinalizerLoader... finalizerLoaderArr) {
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for (FinalizerLoader finalizerLoader : finalizerLoaderArr) {
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Class<?> loadFinalizer = finalizerLoader.loadFinalizer();
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if (loadFinalizer != null) {
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return loadFinalizer;
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}
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}
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throw new AssertionError();
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}
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/* loaded from: classes2.dex */
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static class SystemLoader implements FinalizerLoader {
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static boolean disabled;
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SystemLoader() {
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}
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@Override // com.google.common.base.FinalizableReferenceQueue.FinalizerLoader
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public Class<?> loadFinalizer() {
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if (disabled) {
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return null;
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}
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try {
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ClassLoader systemClassLoader = ClassLoader.getSystemClassLoader();
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if (systemClassLoader != null) {
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try {
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return systemClassLoader.loadClass(FinalizableReferenceQueue.FINALIZER_CLASS_NAME);
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} catch (ClassNotFoundException unused) {
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}
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}
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return null;
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} catch (SecurityException unused2) {
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FinalizableReferenceQueue.logger.info("Not allowed to access system class loader.");
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return null;
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}
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}
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}
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/* loaded from: classes2.dex */
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static class DecoupledLoader implements FinalizerLoader {
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private static final String LOADING_ERROR = "Could not load Finalizer in its own class loader. Loading Finalizer in the current class loader instead. As a result, you will not be able to garbage collect this class loader. To support reclaiming this class loader, either resolve the underlying issue, or move Guava to your system class path.";
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DecoupledLoader() {
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}
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@Override // com.google.common.base.FinalizableReferenceQueue.FinalizerLoader
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public Class<?> loadFinalizer() {
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try {
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return newLoader(getBaseUrl()).loadClass(FinalizableReferenceQueue.FINALIZER_CLASS_NAME);
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} catch (Exception e) {
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FinalizableReferenceQueue.logger.log(Level.WARNING, LOADING_ERROR, (Throwable) e);
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return null;
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}
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}
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URL getBaseUrl() throws IOException {
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String concat = String.valueOf(FinalizableReferenceQueue.FINALIZER_CLASS_NAME.replace('.', '/')).concat(".class");
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URL resource = getClass().getClassLoader().getResource(concat);
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if (resource == null) {
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throw new FileNotFoundException(concat);
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}
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String obj = resource.toString();
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if (!obj.endsWith(concat)) {
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String valueOf = String.valueOf(obj);
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throw new IOException(valueOf.length() != 0 ? "Unsupported path style: ".concat(valueOf) : new String("Unsupported path style: "));
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}
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return new URL(resource, obj.substring(0, obj.length() - concat.length()));
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}
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URLClassLoader newLoader(URL url) {
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return new URLClassLoader(new URL[]{url}, null);
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}
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}
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/* loaded from: classes2.dex */
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static class DirectLoader implements FinalizerLoader {
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DirectLoader() {
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}
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@Override // com.google.common.base.FinalizableReferenceQueue.FinalizerLoader
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public Class<?> loadFinalizer() {
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try {
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return Class.forName(FinalizableReferenceQueue.FINALIZER_CLASS_NAME);
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} catch (ClassNotFoundException e) {
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throw new AssertionError(e);
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}
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}
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}
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static Method getStartFinalizer(Class<?> cls) {
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try {
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return cls.getMethod("startFinalizer", Class.class, ReferenceQueue.class, PhantomReference.class);
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} catch (NoSuchMethodException e) {
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throw new AssertionError(e);
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}
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}
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}
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