| /* |
| * 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.internal.dynalink.support; |
| |
| import jdk.internal.dynalink.CallSiteDescriptor; |
| import jdk.internal.dynalink.linker.LinkRequest; |
| |
| /** |
| * A link request implementation for call sites that pass language runtime specific context arguments on the stack. The |
| * context specific arguments should be the first "n" arguments. |
| */ |
| public class RuntimeContextLinkRequestImpl extends LinkRequestImpl { |
| |
| private final int runtimeContextArgCount; |
| private LinkRequestImpl contextStrippedRequest; |
| |
| /** |
| * Creates a new link request. |
| * |
| * @param callSiteDescriptor the descriptor for the call site being linked |
| * @param callSiteToken the opaque token for the call site being linked. |
| * @param arguments the arguments for the invocation |
| * @param linkCount number of times callsite has been linked/relinked |
| * @param callSiteUnstable true if the call site being linked is considered unstable |
| * @param runtimeContextArgCount the number of the leading arguments on the stack that represent the language |
| * runtime specific context arguments. |
| * @throws IllegalArgumentException if runtimeContextArgCount is less than 1. |
| */ |
| public RuntimeContextLinkRequestImpl(final CallSiteDescriptor callSiteDescriptor, final Object callSiteToken, |
| final int linkCount, final boolean callSiteUnstable, final Object[] arguments, final int runtimeContextArgCount) { |
| super(callSiteDescriptor, callSiteToken, linkCount, callSiteUnstable, arguments); |
| if(runtimeContextArgCount < 1) { |
| throw new IllegalArgumentException("runtimeContextArgCount < 1"); |
| } |
| this.runtimeContextArgCount = runtimeContextArgCount; |
| } |
| |
| @Override |
| public LinkRequest withoutRuntimeContext() { |
| if(contextStrippedRequest == null) { |
| final CallSiteDescriptor desc = getCallSiteDescriptor(); |
| contextStrippedRequest = |
| new LinkRequestImpl(desc.changeMethodType(desc.getMethodType().dropParameterTypes(1, runtimeContextArgCount + 1)), |
| getCallSiteToken(), getLinkCount(), isCallSiteUnstable(), getTruncatedArguments()); |
| } |
| return contextStrippedRequest; |
| } |
| |
| @Override |
| public LinkRequest replaceArguments(final CallSiteDescriptor callSiteDescriptor, final Object[] arguments) { |
| return new RuntimeContextLinkRequestImpl(callSiteDescriptor, getCallSiteToken(), getLinkCount(), isCallSiteUnstable(), arguments, |
| runtimeContextArgCount); |
| } |
| |
| private Object[] getTruncatedArguments() { |
| final Object[] args = getArguments(); |
| final Object[] newargs = new Object[args.length - runtimeContextArgCount]; |
| newargs[0] = args[0]; // "this" remains at the 0th position |
| System.arraycopy(args, runtimeContextArgCount + 1, newargs, 1, newargs.length - 1); |
| return newargs; |
| } |
| } |