src/jdk/internal/dynalink/DefaultBootstrapper.java

Mon, 18 Feb 2013 16:00:15 +0100

author
attila
date
Mon, 18 Feb 2013 16:00:15 +0100
changeset 101
f8221ce53c2e
parent 90
5a820fb11814
child 524
badc919cd621
permissions
-rw-r--r--

8008371: Fix Dynalink compiler warnings and whitespace
Reviewed-by: jlaskey, sundar

attila@90 1 /*
attila@90 2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
attila@90 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
attila@90 4 *
attila@90 5 * This code is free software; you can redistribute it and/or modify it
attila@90 6 * under the terms of the GNU General Public License version 2 only, as
attila@90 7 * published by the Free Software Foundation. Oracle designates this
attila@90 8 * particular file as subject to the "Classpath" exception as provided
attila@90 9 * by Oracle in the LICENSE file that accompanied this code.
attila@90 10 *
attila@90 11 * This code is distributed in the hope that it will be useful, but WITHOUT
attila@90 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
attila@90 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
attila@90 14 * version 2 for more details (a copy is included in the LICENSE file that
attila@90 15 * accompanied this code).
attila@90 16 *
attila@90 17 * You should have received a copy of the GNU General Public License version
attila@90 18 * 2 along with this work; if not, write to the Free Software Foundation,
attila@90 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
attila@90 20 *
attila@90 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
attila@90 22 * or visit www.oracle.com if you need additional information or have any
attila@90 23 * questions.
attila@90 24 */
attila@90 25
attila@90 26 /*
attila@90 27 * This file is available under and governed by the GNU General Public
attila@90 28 * License version 2 only, as published by the Free Software Foundation.
attila@90 29 * However, the following notice accompanied the original version of this
attila@90 30 * file, and Oracle licenses the original version of this file under the BSD
attila@90 31 * license:
attila@90 32 */
attila@90 33 /*
attila@90 34 Copyright 2009-2013 Attila Szegedi
attila@90 35
attila@90 36 Licensed under both the Apache License, Version 2.0 (the "Apache License")
attila@90 37 and the BSD License (the "BSD License"), with licensee being free to
attila@90 38 choose either of the two at their discretion.
attila@90 39
attila@90 40 You may not use this file except in compliance with either the Apache
attila@90 41 License or the BSD License.
attila@90 42
attila@90 43 If you choose to use this file in compliance with the Apache License, the
attila@90 44 following notice applies to you:
attila@90 45
attila@90 46 You may obtain a copy of the Apache License at
attila@90 47
attila@90 48 http://www.apache.org/licenses/LICENSE-2.0
attila@90 49
attila@90 50 Unless required by applicable law or agreed to in writing, software
attila@90 51 distributed under the License is distributed on an "AS IS" BASIS,
attila@90 52 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
attila@90 53 implied. See the License for the specific language governing
attila@90 54 permissions and limitations under the License.
attila@90 55
attila@90 56 If you choose to use this file in compliance with the BSD License, the
attila@90 57 following notice applies to you:
attila@90 58
attila@90 59 Redistribution and use in source and binary forms, with or without
attila@90 60 modification, are permitted provided that the following conditions are
attila@90 61 met:
attila@90 62 * Redistributions of source code must retain the above copyright
attila@90 63 notice, this list of conditions and the following disclaimer.
attila@90 64 * Redistributions in binary form must reproduce the above copyright
attila@90 65 notice, this list of conditions and the following disclaimer in the
attila@90 66 documentation and/or other materials provided with the distribution.
attila@90 67 * Neither the name of the copyright holder nor the names of
attila@90 68 contributors may be used to endorse or promote products derived from
attila@90 69 this software without specific prior written permission.
attila@90 70
attila@90 71 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
attila@90 72 IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
attila@90 73 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
attila@90 74 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER
attila@90 75 BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
attila@90 76 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
attila@90 77 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
attila@90 78 BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
attila@90 79 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
attila@90 80 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
attila@90 81 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
attila@90 82 */
attila@90 83
attila@90 84 package jdk.internal.dynalink;
attila@90 85
attila@90 86 import java.lang.invoke.CallSite;
attila@90 87 import java.lang.invoke.MethodHandles;
attila@90 88 import java.lang.invoke.MethodType;
attila@90 89 import jdk.internal.dynalink.support.CallSiteDescriptorFactory;
attila@90 90
attila@90 91 /**
attila@90 92 * A convenience default bootstrapper that exposes static bootstrap methods which language runtimes that need the very
attila@90 93 * default behavior can use with minimal setup. When first referenced, it will create a dynamic linker with default
attila@90 94 * settings for the {@link DynamicLinkerFactory}, and its bootstrap methods will create {@link MonomorphicCallSite} for
attila@90 95 * all call sites. It has two bootstrap methods: one creates call sites that use the
attila@90 96 * {@link MethodHandles#publicLookup()} as the lookup for all call sites and disregard the one passed in as the caller,
attila@90 97 * and one that just uses the passed caller as the lookup scope. Using the public lookup one is advised if your language
attila@90 98 * runtime has no concept of interacting with Java visibility scopes, as it results in a more lightweight runtime
attila@90 99 * information.
attila@90 100 *
attila@90 101 * @author Attila Szegedi
attila@90 102 */
attila@90 103 public class DefaultBootstrapper {
attila@90 104 private static final DynamicLinker dynamicLinker = new DynamicLinkerFactory().createLinker();
attila@90 105
attila@90 106 private DefaultBootstrapper() {
attila@90 107 }
attila@90 108
attila@90 109 /**
attila@90 110 * Use this method as your bootstrap method (see the documentation of the java.lang.invoke package for how to do
attila@90 111 * this). In case your language runtime doesn't have a concept of interaction with Java access scopes, you might
attila@90 112 * want to consider using
attila@90 113 * {@link #publicBootstrap(java.lang.invoke.MethodHandles.Lookup, String, MethodType)} instead.
attila@90 114 *
attila@90 115 * @param caller the caller's lookup
attila@90 116 * @param name the name of the method at the call site
attila@90 117 * @param type the method signature at the call site
attila@90 118 * @return a new {@link MonomorphicCallSite} linked with the default dynamic linker.
attila@90 119 */
attila@90 120 public static CallSite bootstrap(MethodHandles.Lookup caller, String name, MethodType type) {
attila@90 121 return bootstrapInternal(caller, name, type);
attila@90 122 }
attila@90 123
attila@90 124 /**
attila@90 125 * Use this method as your bootstrap method (see the documentation of the java.lang.invoke package for how to do
attila@90 126 * this) when your language runtime doesn't have a concept of interaction with Java access scopes. If you need to
attila@90 127 * preserve the different caller Lookup objects in the call sites, use
attila@90 128 * {@link #bootstrap(java.lang.invoke.MethodHandles.Lookup, String, MethodType)} instead
attila@90 129 *
attila@90 130 * @param caller the caller's lookup. It is ignored as the call sites will be created with
attila@90 131 * {@link MethodHandles#publicLookup()} instead.
attila@90 132 * @param name the name of the method at the call site
attila@90 133 * @param type the method signature at the call site
attila@90 134 * @return a new {@link MonomorphicCallSite} linked with the default dynamic linker.
attila@90 135 */
attila@90 136 public static CallSite publicBootstrap(@SuppressWarnings("unused") MethodHandles.Lookup caller, String name, MethodType type) {
attila@90 137 return bootstrapInternal(MethodHandles.publicLookup(), name, type);
attila@90 138 }
attila@90 139
attila@90 140 private static CallSite bootstrapInternal(MethodHandles.Lookup caller, String name, MethodType type) {
attila@90 141 return dynamicLinker.link(new MonomorphicCallSite(CallSiteDescriptorFactory.create(caller, name, type)));
attila@90 142 }
attila@101 143 }

mercurial