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JDK 17 java.base.jmod - Base Module
JDK 17 java.base.jmod is the JMOD file for JDK 17 Base module.
JDK 17 Base module compiled class files are stored in \fyicenter\jdk-17.0.5\jmods\java.base.jmod.
JDK 17 Base module compiled class files are also linked and stored in the \fyicenter\jdk-17.0.5\lib\modules JImage file.
JDK 17 Base module source code files are stored in \fyicenter\jdk-17.0.5\lib\src.zip\java.base.
You can click and view the content of each source code file in the list below.
✍: FYIcenter
⏎ java/lang/invoke/ConstantCallSite.java
/* * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. * * * * * * * * * * * * * * * * * * * * */ package java.lang.invoke; import jdk.internal.misc.Unsafe; import jdk.internal.vm.annotation.Stable; /** * A {@code ConstantCallSite} is a {@link CallSite} whose target is permanent, and can never be changed. * An {@code invokedynamic} instruction linked to a {@code ConstantCallSite} is permanently * bound to the call site's target. * @author John Rose, JSR 292 EG * @since 1.7 */ public class ConstantCallSite extends CallSite { private static final Unsafe UNSAFE = Unsafe.getUnsafe(); @Stable // should NOT be constant folded during instance initialization (isFrozen == false) /*final*/ private boolean isFrozen; // Note: This field is known to the JVM. /** * Creates a call site with a permanent target. * @param target the target to be permanently associated with this call site * @throws NullPointerException if the proposed target is null */ public ConstantCallSite(MethodHandle target) { super(target); isFrozen = true; UNSAFE.storeStoreFence(); // properly publish isFrozen update } /** * Creates a call site with a permanent target, possibly bound to the call site itself. * <p> * During construction of the call site, the {@code createTargetHook} is invoked to * produce the actual target, as if by a call of the form * {@code (MethodHandle) createTargetHook.invoke(this)}. * <p> * Note that user code cannot perform such an action directly in a subclass constructor, * since the target must be fixed before the {@code ConstantCallSite} constructor returns. * <p> * The hook is said to bind the call site to a target method handle, * and a typical action would be {@code someTarget.bindTo(this)}. * However, the hook is free to take any action whatever, * including ignoring the call site and returning a constant target. * <p> * The result returned by the hook must be a method handle of exactly * the same type as the call site. * <p> * While the hook is being called, the new {@code ConstantCallSite} * object is in a partially constructed state. * In this state, * a call to {@code getTarget}, or any other attempt to use the target, * will result in an {@code IllegalStateException}. * It is legal at all times to obtain the call site's type using the {@code type} method. * * @param targetType the type of the method handle to be permanently associated with this call site * @param createTargetHook a method handle to invoke (on the call site) to produce the call site's target * @throws WrongMethodTypeException if the hook cannot be invoked on the required arguments, * or if the target returned by the hook is not of the given {@code targetType} * @throws NullPointerException if the hook returns a null value * @throws ClassCastException if the hook returns something other than a {@code MethodHandle} * @throws Throwable anything else thrown by the hook function */ protected ConstantCallSite(MethodType targetType, MethodHandle createTargetHook) throws Throwable { super(targetType, createTargetHook); // "this" instance leaks into createTargetHook isFrozen = true; UNSAFE.storeStoreFence(); // properly publish isFrozen } /** * Returns the target method of the call site, which behaves * like a {@code final} field of the {@code ConstantCallSite}. * That is, the target is always the original value passed * to the constructor call which created this instance. * * @return the immutable linkage state of this call site, a constant method handle * @throws IllegalStateException if the {@code ConstantCallSite} constructor has not completed */ @Override public final MethodHandle getTarget() { if (!isFrozen) throw new IllegalStateException(); return target; } /** * Always throws an {@link UnsupportedOperationException}. * This kind of call site cannot change its target. * @param ignore a new target proposed for the call site, which is ignored * @throws UnsupportedOperationException because this kind of call site cannot change its target */ @Override public final void setTarget(MethodHandle ignore) { throw new UnsupportedOperationException(); } /** * Returns this call site's permanent target. * Since that target will never change, this is a correct implementation * of {@link CallSite#dynamicInvoker CallSite.dynamicInvoker}. * @return the immutable linkage state of this call site, a constant method handle * @throws IllegalStateException if the {@code ConstantCallSite} constructor has not completed */ @Override public final MethodHandle dynamicInvoker() { return getTarget(); } }
⏎ java/lang/invoke/ConstantCallSite.java
Or download all of them as a single archive file:
File name: java.base-17.0.5-src.zip File size: 8883851 bytes Release date: 2022-09-13 Download
2023-09-26, 93419👍, 1💬
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