1 /* |
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2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 /* |
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27 * This file is available under and governed by the GNU General Public |
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28 * License version 2 only, as published by the Free Software Foundation. |
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29 * However, the following notice accompanied the original version of this |
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30 * file, and Oracle licenses the original version of this file under the BSD |
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31 * license: |
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32 */ |
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33 /* |
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34 Copyright 2009-2013 Attila Szegedi |
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35 |
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36 Licensed under both the Apache License, Version 2.0 (the "Apache License") |
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37 and the BSD License (the "BSD License"), with licensee being free to |
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38 choose either of the two at their discretion. |
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39 |
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40 You may not use this file except in compliance with either the Apache |
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41 License or the BSD License. |
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42 |
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43 If you choose to use this file in compliance with the Apache License, the |
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44 following notice applies to you: |
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45 |
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46 You may obtain a copy of the Apache License at |
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47 |
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48 http://www.apache.org/licenses/LICENSE-2.0 |
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49 |
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50 Unless required by applicable law or agreed to in writing, software |
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51 distributed under the License is distributed on an "AS IS" BASIS, |
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52 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
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53 implied. See the License for the specific language governing |
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54 permissions and limitations under the License. |
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55 |
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56 If you choose to use this file in compliance with the BSD License, the |
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57 following notice applies to you: |
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58 |
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59 Redistribution and use in source and binary forms, with or without |
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60 modification, are permitted provided that the following conditions are |
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61 met: |
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62 * Redistributions of source code must retain the above copyright |
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63 notice, this list of conditions and the following disclaimer. |
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64 * Redistributions in binary form must reproduce the above copyright |
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65 notice, this list of conditions and the following disclaimer in the |
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66 documentation and/or other materials provided with the distribution. |
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67 * Neither the name of the copyright holder nor the names of |
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68 contributors may be used to endorse or promote products derived from |
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69 this software without specific prior written permission. |
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70 |
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71 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
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72 IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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73 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
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74 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER |
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75 BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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76 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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77 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
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78 BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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79 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
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80 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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81 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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82 */ |
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83 |
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84 package jdk.internal.dynalink.linker; |
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85 |
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86 import jdk.internal.dynalink.CallSiteDescriptor; |
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87 import jdk.internal.dynalink.DynamicLinker; |
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88 import jdk.internal.dynalink.DynamicLinkerFactory; |
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89 |
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90 /** |
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91 * Represents a request to link a particular invocation at a particular call |
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92 * site. Instances of these requests will be constructed and passed to all |
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93 * {@link GuardingDynamicLinker} objects managed by the {@link DynamicLinker} |
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94 * that is trying to link the call site. |
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95 */ |
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96 public interface LinkRequest { |
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97 /** |
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98 * Returns the call site descriptor for the call site being linked. |
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99 * |
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100 * @return the call site descriptor for the call site being linked. |
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101 */ |
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102 public CallSiteDescriptor getCallSiteDescriptor(); |
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103 |
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104 /** |
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105 * Returns the arguments for the invocation being linked. The returned array |
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106 * must be a clone; modifications to it must not affect the arguments in |
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107 * this request. |
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108 * |
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109 * @return the arguments for the invocation being linked. |
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110 */ |
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111 public Object[] getArguments(); |
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112 |
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113 /** |
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114 * Returns the first argument for the invocation being linked; this is |
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115 * typically the receiver object. This is a shorthand for |
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116 * {@code getArguments()[0]} that also avoids the cloning of the arguments |
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117 * array. |
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118 * |
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119 * @return the receiver object. |
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120 */ |
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121 public Object getReceiver(); |
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122 |
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123 /** |
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124 * Returns true if the call site is considered unstable, that is, it has been relinked more times than was |
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125 * specified in {@link DynamicLinkerFactory#setUnstableRelinkThreshold(int)}. Linkers should use this as a |
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126 * hint to prefer producing linkage that is more stable (its guard fails less frequently), even if that assumption |
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127 * causes a less effective version of an operation to be linked. This is just a hint, though, and linkers are |
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128 * allowed to ignore this property. |
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129 * @return true if the call site is considered unstable. |
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130 */ |
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131 public boolean isCallSiteUnstable(); |
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132 |
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133 /** |
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134 * Returns a request identical to this one with call site descriptor and arguments replaced with the ones specified. |
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135 * |
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136 * @param callSiteDescriptor the new call site descriptor |
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137 * @param arguments the new arguments |
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138 * @return a new request identical to this one, except with the call site descriptor and arguments replaced with the |
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139 * specified ones. |
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140 */ |
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141 public LinkRequest replaceArguments(CallSiteDescriptor callSiteDescriptor, Object... arguments); |
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142 } |
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