author | erikj |
Tue, 12 Sep 2017 19:03:39 +0200 | |
changeset 47216 | 71c04702a3d5 |
parent 25865 | nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/ArgumentSetter.java@d38d876f1654 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package jdk.nashorn.internal.runtime; |
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import static jdk.nashorn.internal.codegen.CompilerConstants.staticCallNoLookup; |
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import jdk.nashorn.internal.codegen.CompilerConstants.Call; |
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/** |
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* A class with static helper methods invoked from generated bytecode for setting values of parameters of variable-arity |
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* functions. |
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*/ |
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public final class ArgumentSetter { |
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private ArgumentSetter() {} |
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/** Method handle for setting a function argument at a given index in an arguments object. Used from generated bytecode */ |
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public static final Call SET_ARGUMENT = staticCallNoLookup(ArgumentSetter.class, "setArgument", void.class, Object.class, ScriptObject.class, int.class); |
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/** Method handle for setting a function argument at a given index in an arguments array. Used from generated bytecode */ |
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public static final Call SET_ARRAY_ELEMENT = staticCallNoLookup(ArgumentSetter.class, "setArrayElement", void.class, Object.class, Object[].class, int.class); |
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/** |
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* Used from generated bytecode to invoke {@link ScriptObject#setArgument(int, Object)} without having to reorder |
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* the arguments on the stack. When we're generating a store into the argument, we first have the value on the |
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* stack, and only afterwards load the target object and the index. |
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* @param value the value to write at the given argument index. |
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* @param arguments the arguments object that we're writing the value to |
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* @param key the index of the argument |
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*/ |
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public static void setArgument(final Object value, final ScriptObject arguments, final int key) { |
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arguments.setArgument(key, value); |
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} |
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/** |
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* Used from generated bytecode to set a variable arity parameter - an array element - without having to reorder |
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* the arguments on the stack. When we're generating a store into the array, we first have the value on the |
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* stack, and only afterwards load the target array and the index. |
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* @param value the value to write at the given argument index. |
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* @param arguments the arguments array that we're writing the value to |
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* @param key the index of the argument |
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*/ |
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public static void setArrayElement(final Object value, final Object[] arguments, final int key) { |
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arguments[key] = value; |
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} |
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} |