| /* |
| * Copyright (c) 2010, 2015, 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. |
| */ |
| |
| package jdk.nashorn.internal.runtime; |
| |
| import static jdk.nashorn.internal.codegen.CompilerConstants.virtualCallNoLookup; |
| |
| import jdk.nashorn.internal.codegen.CompilerConstants; |
| |
| /** |
| * A {@link ScriptObject} subclass for objects that act as scope. |
| */ |
| public class Scope extends ScriptObject { |
| |
| /* This is used to store return state of split functions. */ |
| private int splitState = -1; |
| |
| /** This is updated only in debug mode - counts number of {@code ScriptObject} instances created that are scope */ |
| private static int count; |
| |
| /** Method handle that points to {@link Scope#getSplitState}. */ |
| public static final CompilerConstants.Call GET_SPLIT_STATE = virtualCallNoLookup(Scope.class, "getSplitState", int.class); |
| /** Method handle that points to {@link Scope#setSplitState(int)}. */ |
| public static final CompilerConstants.Call SET_SPLIT_STATE = virtualCallNoLookup(Scope.class, "setSplitState", void.class, int.class); |
| |
| /** |
| * Constructor |
| * |
| * @param map initial property map |
| */ |
| public Scope(final PropertyMap map) { |
| super(map); |
| if (Context.DEBUG) { |
| count++; |
| } |
| } |
| |
| /** |
| * Constructor |
| * |
| * @param proto parent scope |
| * @param map initial property map |
| */ |
| public Scope(final ScriptObject proto, final PropertyMap map) { |
| super(proto, map); |
| if (Context.DEBUG) { |
| count++; |
| } |
| } |
| |
| /** |
| * Constructor |
| * |
| * @param map property map |
| * @param primitiveSpill primitive spill array |
| * @param objectSpill reference spill array |
| */ |
| public Scope(final PropertyMap map, final long[] primitiveSpill, final Object[] objectSpill) { |
| super(map, primitiveSpill, objectSpill); |
| if (Context.DEBUG) { |
| count++; |
| } |
| } |
| |
| @Override |
| public boolean isScope() { |
| return true; |
| } |
| |
| @Override |
| boolean hasWithScope() { |
| for (ScriptObject obj = this; obj != null; obj = obj.getProto()) { |
| if (obj instanceof WithObject) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Get the scope's split method state. |
| * |
| * @return current split state |
| */ |
| public int getSplitState() { |
| return splitState; |
| } |
| |
| /** |
| * Set the scope's split method state. |
| * |
| * @param state current split state |
| */ |
| public void setSplitState(final int state) { |
| splitState = state; |
| } |
| |
| /** |
| * Get number of {@code Scope} instances created. If not running in debug |
| * mode this is always 0. |
| * |
| * @return number of scope ScriptObjects created |
| */ |
| public static int getScopeCount() { |
| return count; |
| } |
| } |