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comparison graal/com.oracle.truffle.api.interop/src/com/oracle/truffle/api/interop/ObjectAccessNode.java @ 21770:c76742cc2c6f

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Polishing inter-operability APIs: Exposing only Message, TruffleObject and ForeignAccess-related classes.
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Mon, 08 Jun 2015 04:50:13 +0200
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21769:b6309a7d5a44 21770:c76742cc2c6f
1 /*
2 * Copyright (c) 2014, 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 package com.oracle.truffle.api.interop;
26
27 import com.oracle.truffle.api.*;
28 import com.oracle.truffle.api.frame.*;
29 import com.oracle.truffle.api.nodes.*;
30
31 abstract class ObjectAccessNode extends Node {
32
33 public abstract Object executeWith(VirtualFrame frame, TruffleObject receiver, Object[] arguments);
34
35 }
36
37 class UnresolvedObjectAccessNode extends ObjectAccessNode {
38
39 private static final int CACHE_SIZE = 8;
40 private int cacheLength = 1;
41
42 @Override
43 public Object executeWith(VirtualFrame frame, TruffleObject receiver, Object[] arguments) {
44 CompilerDirectives.transferToInterpreterAndInvalidate();
45 ForeignObjectAccessHeadNode nthParent = (ForeignObjectAccessHeadNode) NodeUtil.getNthParent(this, cacheLength);
46 ObjectAccessNode first = nthParent.getFirst();
47 if (cacheLength < CACHE_SIZE) {
48 cacheLength++;
49 CachedObjectAccessNode createCachedAccess = createCachedAccess(receiver, nthParent.getAccessTree(), first);
50 return first.replace(createCachedAccess).executeWith(frame, receiver, arguments);
51 } else {
52 return first.replace(createGenericAccess(nthParent.getAccessTree())).executeWith(frame, receiver, arguments);
53 }
54 }
55
56 private static CachedObjectAccessNode createCachedAccess(TruffleObject receiver, Message accessTree, ObjectAccessNode next) {
57 ForeignAccess fa = receiver.getForeignAccess();
58 final CallTarget ct = fa.access(accessTree);
59 if (ct == null) {
60 throw new IllegalArgumentException("Message " + accessTree + " not recognized by " + fa);
61 }
62 return new CachedObjectAccessNode(Truffle.getRuntime().createDirectCallNode(ct), next, fa);
63 }
64
65 private static GenericObjectAccessNode createGenericAccess(Message access) {
66 return new GenericObjectAccessNode(access);
67 }
68 }
69
70 class GenericObjectAccessNode extends ObjectAccessNode {
71
72 private final Message access;
73 @Child private IndirectCallNode indirectCallNode;
74
75 public GenericObjectAccessNode(Message access) {
76 this.access = access;
77 indirectCallNode = Truffle.getRuntime().createIndirectCallNode();
78 }
79
80 public GenericObjectAccessNode(GenericObjectAccessNode prev) {
81 this(prev.access);
82 }
83
84 @Override
85 public Object executeWith(VirtualFrame frame, TruffleObject truffleObject, Object[] arguments) {
86 final ForeignAccess fa = truffleObject.getForeignAccess();
87 final CallTarget ct = fa.access(access);
88 if (ct == null) {
89 throw new IllegalStateException("Message " + access + " not recognized by " + fa);
90 }
91 return indirectCallNode.call(frame, ct, ForeignAccessArguments.create(truffleObject, arguments));
92 }
93 }
94
95 class CachedObjectAccessNode extends ObjectAccessNode {
96 @Child private DirectCallNode callTarget;
97 @Child private ObjectAccessNode next;
98
99 private final ForeignAccess languageCheck;
100
101 protected CachedObjectAccessNode(DirectCallNode callTarget, ObjectAccessNode next, ForeignAccess languageCheck) {
102 this.callTarget = callTarget;
103 this.next = next;
104 this.languageCheck = languageCheck;
105 this.callTarget.forceInlining();
106 }
107
108 protected CachedObjectAccessNode(CachedObjectAccessNode prev) {
109 this(prev.callTarget, prev.next, prev.languageCheck);
110 }
111
112 @Override
113 public Object executeWith(VirtualFrame frame, TruffleObject receiver, Object[] arguments) {
114 return doAccess(frame, receiver, arguments);
115 }
116
117 private Object doAccess(VirtualFrame frame, TruffleObject receiver, Object[] arguments) {
118 if (languageCheck.canHandle(receiver)) {
119 return callTarget.call(frame, ForeignAccessArguments.create(receiver, arguments));
120 } else {
121 return doNext(frame, receiver, arguments);
122 }
123 }
124
125 private Object doNext(VirtualFrame frame, TruffleObject receiver, Object[] arguments) {
126 return next.executeWith(frame, receiver, arguments);
127 }
128 }