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1 /*
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2 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
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3 * code is released under a tri EPL/GPL/LGPL license. You can use it,
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4 * redistribute it and/or modify it under the terms of the:
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5 *
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6 * Eclipse Public License version 1.0
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7 * GNU General Public License version 2
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8 * GNU Lesser General Public License version 2.1
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9 */
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10 package com.oracle.truffle.ruby.nodes.call;
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11
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12 import com.oracle.truffle.api.*;
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13 import com.oracle.truffle.api.frame.*;
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14 import com.oracle.truffle.api.utilities.*;
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15 import com.oracle.truffle.ruby.runtime.*;
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16 import com.oracle.truffle.ruby.runtime.core.*;
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17 import com.oracle.truffle.ruby.runtime.objects.*;
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18
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19 /**
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20 * A node in the dispatch chain that boxes the receiver into a full Ruby {@link RubyBasicObject}.
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21 * This node is initially created as an {@link UninitializedBoxingDispatchNode} and only becomes
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22 * this node when we know that we do need to box on the fast path. Within this node we specialized
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23 * for the case that the receiver is always already boxed.
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24 */
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25 public class BoxingDispatchNode extends UnboxedDispatchNode {
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26
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27 @Child protected BoxedDispatchNode next;
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28
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29 private final BranchProfile boxBranch = new BranchProfile();
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30
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31 public BoxingDispatchNode(RubyContext context, SourceSection sourceSection, BoxedDispatchNode next) {
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32 super(context, sourceSection);
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33
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34 this.next = adoptChild(next);
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35 }
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36
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37 @Override
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38 public Object dispatch(VirtualFrame frame, Object receiverObject, RubyProc blockObject, Object[] argumentsObjects) {
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39 RubyBasicObject boxedReceiverObject;
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40
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41 if (receiverObject instanceof RubyBasicObject) {
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42 boxedReceiverObject = (RubyBasicObject) receiverObject;
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43 } else {
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44 boxBranch.enter();
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45 boxedReceiverObject = getContext().getCoreLibrary().box(receiverObject);
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46 }
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47
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48 return next.dispatch(frame, boxedReceiverObject, blockObject, argumentsObjects);
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49 }
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50
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51 }
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