diff -r 4ebc2e2fb97c -r 71c04702a3d5 src/jdk.dynalink/share/classes/jdk/dynalink/support/SimpleRelinkableCallSite.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/jdk.dynalink/share/classes/jdk/dynalink/support/SimpleRelinkableCallSite.java Tue Sep 12 19:03:39 2017 +0200 @@ -0,0 +1,116 @@ +/* + * Copyright (c) 2010, 2013, 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. + */ + +/* + * This file is available under and governed by the GNU General Public + * License version 2 only, as published by the Free Software Foundation. + * However, the following notice accompanied the original version of this + * file, and Oracle licenses the original version of this file under the BSD + * license: + */ +/* + Copyright 2009-2013 Attila Szegedi + + Licensed under both the Apache License, Version 2.0 (the "Apache License") + and the BSD License (the "BSD License"), with licensee being free to + choose either of the two at their discretion. + + You may not use this file except in compliance with either the Apache + License or the BSD License. + + If you choose to use this file in compliance with the Apache License, the + following notice applies to you: + + You may obtain a copy of the Apache License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + implied. See the License for the specific language governing + permissions and limitations under the License. + + If you choose to use this file in compliance with the BSD License, the + following notice applies to you: + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are + met: + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + * Neither the name of the copyright holder nor the names of + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER + BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +package jdk.dynalink.support; + +import java.lang.invoke.MethodHandle; +import jdk.dynalink.CallSiteDescriptor; +import jdk.dynalink.DynamicLinker; +import jdk.dynalink.linker.GuardedInvocation; + +/** + * A relinkable call site that implements monomorphic inline caching strategy, + * only being linked to a single {@link GuardedInvocation} at any given time. + * If the guard of that single invocation fails, or it has an invalidated + * switch point, or its invalidating exception triggered, then the call site + * will throw it away and ask its associated {@link DynamicLinker} to relink it. + */ +public class SimpleRelinkableCallSite extends AbstractRelinkableCallSite { + /** + * Creates a new call site with monomorphic inline caching strategy. + * @param descriptor the descriptor for this call site + */ + public SimpleRelinkableCallSite(final CallSiteDescriptor descriptor) { + super(descriptor); + } + + @Override + public void relink(final GuardedInvocation guardedInvocation, final MethodHandle relinkAndInvoke) { + setTarget(guardedInvocation.compose(relinkAndInvoke)); + } + + @Override + public void resetAndRelink(final GuardedInvocation guardedInvocation, final MethodHandle relinkAndInvoke) { + relink(guardedInvocation, relinkAndInvoke); + } +}