1.1 --- a/rt/emul/compact/src/main/java/java/lang/invoke/VolatileCallSite.java	Sun Aug 17 20:09:05 2014 +0200
     1.2 +++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.3 @@ -1,109 +0,0 @@
     1.4 -/*
     1.5 - * Copyright (c) 2010, 2011, Oracle and/or its affiliates. All rights reserved.
     1.6 - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 - *
     1.8 - * This code is free software; you can redistribute it and/or modify it
     1.9 - * under the terms of the GNU General Public License version 2 only, as
    1.10 - * published by the Free Software Foundation.  Oracle designates this
    1.11 - * particular file as subject to the "Classpath" exception as provided
    1.12 - * by Oracle in the LICENSE file that accompanied this code.
    1.13 - *
    1.14 - * This code is distributed in the hope that it will be useful, but WITHOUT
    1.15 - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.16 - * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.17 - * version 2 for more details (a copy is included in the LICENSE file that
    1.18 - * accompanied this code).
    1.19 - *
    1.20 - * You should have received a copy of the GNU General Public License version
    1.21 - * 2 along with this work; if not, write to the Free Software Foundation,
    1.22 - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.23 - *
    1.24 - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    1.25 - * or visit www.oracle.com if you need additional information or have any
    1.26 - * questions.
    1.27 - */
    1.28 -
    1.29 -package java.lang.invoke;
    1.30 -
    1.31 -/**
    1.32 - * A {@code VolatileCallSite} is a {@link CallSite} whose target acts like a volatile variable.
    1.33 - * An {@code invokedynamic} instruction linked to a {@code VolatileCallSite} sees updates
    1.34 - * to its call site target immediately, even if the update occurs in another thread.
    1.35 - * There may be a performance penalty for such tight coupling between threads.
    1.36 - * <p>
    1.37 - * Unlike {@code MutableCallSite}, there is no
    1.38 - * {@linkplain MutableCallSite#syncAll syncAll operation} on volatile
    1.39 - * call sites, since every write to a volatile variable is implicitly
    1.40 - * synchronized with reader threads.
    1.41 - * <p>
    1.42 - * In other respects, a {@code VolatileCallSite} is interchangeable
    1.43 - * with {@code MutableCallSite}.
    1.44 - * @see MutableCallSite
    1.45 - * @author John Rose, JSR 292 EG
    1.46 - */
    1.47 -public class VolatileCallSite extends CallSite {
    1.48 -    /**
    1.49 -     * Creates a call site with a volatile binding to its target.
    1.50 -     * The initial target is set to a method handle
    1.51 -     * of the given type which will throw an {@code IllegalStateException} if called.
    1.52 -     * @param type the method type that this call site will have
    1.53 -     * @throws NullPointerException if the proposed type is null
    1.54 -     */
    1.55 -    public VolatileCallSite(MethodType type) {
    1.56 -        super(type);
    1.57 -    }
    1.58 -
    1.59 -    /**
    1.60 -     * Creates a call site with a volatile binding to its target.
    1.61 -     * The target is set to the given value.
    1.62 -     * @param target the method handle that will be the initial target of the call site
    1.63 -     * @throws NullPointerException if the proposed target is null
    1.64 -     */
    1.65 -    public VolatileCallSite(MethodHandle target) {
    1.66 -        super(target);
    1.67 -    }
    1.68 -
    1.69 -    /**
    1.70 -     * Returns the target method of the call site, which behaves
    1.71 -     * like a {@code volatile} field of the {@code VolatileCallSite}.
    1.72 -     * <p>
    1.73 -     * The interactions of {@code getTarget} with memory are the same
    1.74 -     * as of a read from a {@code volatile} field.
    1.75 -     * <p>
    1.76 -     * In particular, the current thread is required to issue a fresh
    1.77 -     * read of the target from memory, and must not fail to see
    1.78 -     * a recent update to the target by another thread.
    1.79 -     *
    1.80 -     * @return the linkage state of this call site, a method handle which can change over time
    1.81 -     * @see #setTarget
    1.82 -     */
    1.83 -    @Override public final MethodHandle getTarget() {
    1.84 -        return getTargetVolatile();
    1.85 -    }
    1.86 -
    1.87 -    /**
    1.88 -     * Updates the target method of this call site, as a volatile variable.
    1.89 -     * The type of the new target must agree with the type of the old target.
    1.90 -     * <p>
    1.91 -     * The interactions with memory are the same as of a write to a volatile field.
    1.92 -     * In particular, any threads is guaranteed to see the updated target
    1.93 -     * the next time it calls {@code getTarget}.
    1.94 -     * @param newTarget the new target
    1.95 -     * @throws NullPointerException if the proposed new target is null
    1.96 -     * @throws WrongMethodTypeException if the proposed new target
    1.97 -     *         has a method type that differs from the previous target
    1.98 -     * @see #getTarget
    1.99 -     */
   1.100 -    @Override public void setTarget(MethodHandle newTarget) {
   1.101 -        checkTargetChange(getTargetVolatile(), newTarget);
   1.102 -        setTargetVolatile(newTarget);
   1.103 -    }
   1.104 -
   1.105 -    /**
   1.106 -     * {@inheritDoc}
   1.107 -     */
   1.108 -    @Override
   1.109 -    public final MethodHandle dynamicInvoker() {
   1.110 -        return makeDynamicInvoker();
   1.111 -    }
   1.112 -}