1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/jdk/internal/dynalink/linker/LinkRequest.java Thu Feb 14 13:22:26 2013 +0100
1.3 @@ -0,0 +1,149 @@
1.4 +/*
1.5 + * Copyright (c) 2010, 2013, 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 +/*
1.30 + * This file is available under and governed by the GNU General Public
1.31 + * License version 2 only, as published by the Free Software Foundation.
1.32 + * However, the following notice accompanied the original version of this
1.33 + * file, and Oracle licenses the original version of this file under the BSD
1.34 + * license:
1.35 + */
1.36 +/*
1.37 + Copyright 2009-2013 Attila Szegedi
1.38 +
1.39 + Licensed under both the Apache License, Version 2.0 (the "Apache License")
1.40 + and the BSD License (the "BSD License"), with licensee being free to
1.41 + choose either of the two at their discretion.
1.42 +
1.43 + You may not use this file except in compliance with either the Apache
1.44 + License or the BSD License.
1.45 +
1.46 + If you choose to use this file in compliance with the Apache License, the
1.47 + following notice applies to you:
1.48 +
1.49 + You may obtain a copy of the Apache License at
1.50 +
1.51 + http://www.apache.org/licenses/LICENSE-2.0
1.52 +
1.53 + Unless required by applicable law or agreed to in writing, software
1.54 + distributed under the License is distributed on an "AS IS" BASIS,
1.55 + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
1.56 + implied. See the License for the specific language governing
1.57 + permissions and limitations under the License.
1.58 +
1.59 + If you choose to use this file in compliance with the BSD License, the
1.60 + following notice applies to you:
1.61 +
1.62 + Redistribution and use in source and binary forms, with or without
1.63 + modification, are permitted provided that the following conditions are
1.64 + met:
1.65 + * Redistributions of source code must retain the above copyright
1.66 + notice, this list of conditions and the following disclaimer.
1.67 + * Redistributions in binary form must reproduce the above copyright
1.68 + notice, this list of conditions and the following disclaimer in the
1.69 + documentation and/or other materials provided with the distribution.
1.70 + * Neither the name of the copyright holder nor the names of
1.71 + contributors may be used to endorse or promote products derived from
1.72 + this software without specific prior written permission.
1.73 +
1.74 + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
1.75 + IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
1.76 + TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
1.77 + PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER
1.78 + BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1.79 + CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1.80 + SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
1.81 + BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
1.82 + WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
1.83 + OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
1.84 + ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.85 +*/
1.86 +
1.87 +package jdk.internal.dynalink.linker;
1.88 +
1.89 +import jdk.internal.dynalink.CallSiteDescriptor;
1.90 +import jdk.internal.dynalink.DynamicLinkerFactory;
1.91 +
1.92 +/**
1.93 + * Represents a request to link a particular invocation at a particular call site. Instances of these requests are being
1.94 + * passed to {@link GuardingDynamicLinker}.
1.95 + *
1.96 + * @author Attila Szegedi
1.97 + */
1.98 +public interface LinkRequest {
1.99 + /**
1.100 + * Returns the call site descriptor for the call site being linked.
1.101 + *
1.102 + * @return the call site descriptor for the call site being linked.
1.103 + */
1.104 + public CallSiteDescriptor getCallSiteDescriptor();
1.105 +
1.106 + /**
1.107 + * Returns the arguments for the invocation being linked. The returned array is a clone; modifications to it won't
1.108 + * affect the arguments in this request.
1.109 + *
1.110 + * @return the arguments for the invocation being linked.
1.111 + */
1.112 + public Object[] getArguments();
1.113 +
1.114 + /**
1.115 + * Returns the 0th argument for the invocation being linked; this is typically the receiver object.
1.116 + *
1.117 + * @return the receiver object.
1.118 + */
1.119 + public Object getReceiver();
1.120 +
1.121 + /**
1.122 + * Returns true if the call site is considered unstable, that is, it has been relinked more times than was
1.123 + * specified in {@link DynamicLinkerFactory#setUnstableRelinkThreshold(int)}. Linkers should use this as a
1.124 + * hint to prefer producing linkage that is more stable (its guard fails less frequently), even if that assumption
1.125 + * causes a less effective version of an operation to be linked. This is just a hint, of course, and linkers are
1.126 + * free to ignore this property.
1.127 + * @return true if the call site is considered unstable.
1.128 + */
1.129 + public boolean isCallSiteUnstable();
1.130 +
1.131 + /**
1.132 + * Returns a request stripped from runtime context arguments. Some language runtimes will include runtime-specific
1.133 + * context parameters in their call sites as few arguments between 0th argument "this" and the normal arguments. If
1.134 + * a linker does not recognize such contexts at all, or does not recognize the call site as one with its own
1.135 + * context, it can ask for the alternative link request with context parameters and arguments removed, and link
1.136 + * against it instead.
1.137 + *
1.138 + * @return the context-stripped request. If the link request does not have any language runtime specific context
1.139 + * parameters, the same link request is returned.
1.140 + */
1.141 + public LinkRequest withoutRuntimeContext();
1.142 +
1.143 + /**
1.144 + * Returns a request identical to this one with call site descriptor and arguments replaced with the ones specified.
1.145 + *
1.146 + * @param callSiteDescriptor the new call site descriptor
1.147 + * @param arguments the new arguments
1.148 + * @return a new request identical to this one, except with the call site descriptor and arguments replaced with the
1.149 + * specified ones.
1.150 + */
1.151 + public LinkRequest replaceArguments(CallSiteDescriptor callSiteDescriptor, Object[] arguments);
1.152 +}
1.153 \ No newline at end of file
