1 /* 2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.nashorn.internal.runtime; 27 28 import static jdk.nashorn.internal.codegen.CompilerConstants.interfaceCallNoLookup; 29 30 import jdk.nashorn.internal.codegen.CompilerConstants; 31 32 /** 33 * Interface implemented by {@link ScriptObject}s that act as scope. 34 */ 35 public interface Scope { 36 37 /** Method handle that points to {@link Scope#getSplitState}. */ 38 public static final CompilerConstants.Call GET_SPLIT_STATE = interfaceCallNoLookup(Scope.class, "getSplitState", int.class); 39 40 /** Method handle that points to {@link Scope#setSplitState(int)}. */ 41 public static final CompilerConstants.Call SET_SPLIT_STATE = interfaceCallNoLookup(Scope.class, "setSplitState", void.class, int.class); 42 43 /** 44 * Get the scope's split method state. 45 * @return the current state 46 */ 47 public int getSplitState(); 48 49 /** 50 * Set the scope's split method state. 51 * @param state the new state. 52 */ 53 public void setSplitState(int state); 54 } | 1 /* 2 * Copyright (c) 2010, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.nashorn.internal.runtime; 27 28 import static jdk.nashorn.internal.codegen.CompilerConstants.virtualCallNoLookup; 29 30 import jdk.nashorn.internal.codegen.CompilerConstants; 31 32 /** 33 * A {@link ScriptObject} subclass for objects that act as scope. 34 */ 35 public class Scope extends ScriptObject { 36 37 // Flag to indicate that a split method issued a return statement 38 private int splitState = -1; 39 40 /** This is updated only in debug mode - counts number of {@code ScriptObject} instances created that are scope */ 41 private static int count; 42 43 /** Method handle that points to {@link Scope#getSplitState}. */ 44 public static final CompilerConstants.Call GET_SPLIT_STATE = virtualCallNoLookup(Scope.class, "getSplitState", int.class); 45 /** Method handle that points to {@link Scope#setSplitState(int)}. */ 46 public static final CompilerConstants.Call SET_SPLIT_STATE = virtualCallNoLookup(Scope.class, "setSplitState", void.class, int.class); 47 48 /** 49 * Constructor 50 * 51 * @param map initial property map 52 */ 53 public Scope(final PropertyMap map) { 54 super(map); 55 if (Context.DEBUG) { 56 count++; 57 } 58 } 59 60 /** 61 * Constructor 62 * 63 * @param proto parent scope 64 * @param map initial property map 65 */ 66 public Scope(final ScriptObject proto, final PropertyMap map) { 67 super(proto, map); 68 if (Context.DEBUG) { 69 count++; 70 } 71 } 72 73 /** 74 * Constructor 75 * 76 * @param map property map 77 * @param primitiveSpill primitive spill array 78 * @param objectSpill reference spill array 79 */ 80 public Scope(final PropertyMap map, final long[] primitiveSpill, final Object[] objectSpill) { 81 super(map, primitiveSpill, objectSpill); 82 if (Context.DEBUG) { 83 count++; 84 } 85 } 86 87 @Override 88 public boolean isScope() { 89 return true; 90 } 91 92 @Override 93 boolean hasWithScope() { 94 for (ScriptObject obj = this; obj != null; obj = obj.getProto()) { 95 if (obj instanceof WithObject) { 96 return true; 97 } 98 } 99 return false; 100 } 101 102 /** 103 * Get the scope's split method state. 104 * 105 * @return current split state 106 */ 107 public int getSplitState() { 108 return splitState; 109 } 110 111 /** 112 * Set the scope's split method state. 113 * 114 * @param state current split state 115 */ 116 public void setSplitState(final int state) { 117 splitState = state; 118 } 119 120 /** 121 * Get number of {@code Scope} instances created. If not running in debug 122 * mode this is always 0. 123 * 124 * @return number of scope ScriptObjects created 125 */ 126 public static int getScopeCount() { 127 return count; 128 } 129 } |