Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/access/SLReadPropertyCacheNode.java @ 21615:838f005f9aec
handle service filtering that returns an empty result
author | Doug Simon <doug.simon@oracle.com> |
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date | Sun, 31 May 2015 14:30:13 +0200 |
parents | 73211b2c7c7a |
children |
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/* * Copyright (c) 2013, 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. * * 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 com.oracle.truffle.sl.nodes.access; import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary; import com.oracle.truffle.api.dsl.*; import com.oracle.truffle.api.nodes.*; import com.oracle.truffle.api.object.*; import com.oracle.truffle.sl.runtime.*; public abstract class SLReadPropertyCacheNode extends Node { protected static final int CACHE_LIMIT = 3; protected final String propertyName; public SLReadPropertyCacheNode(String propertyName) { this.propertyName = propertyName; } public static SLReadPropertyCacheNode create(String propertyName) { return SLReadPropertyCacheNodeGen.create(propertyName); } public abstract Object executeObject(DynamicObject receiver); public abstract long executeLong(DynamicObject receiver) throws UnexpectedResultException; /* * We use a separate long specialization to avoid boxing for long. */ @Specialization(limit = "CACHE_LIMIT", guards = {"longLocation != null", "shape.check(receiver)"}, assumptions = "shape.getValidAssumption()") @SuppressWarnings("unused") protected long doCachedLong(DynamicObject receiver, // @Cached("receiver.getShape()") Shape shape, // @Cached("getLongLocation(shape)") LongLocation longLocation) { return longLocation.getLong(receiver, true); } protected LongLocation getLongLocation(Shape shape) { Property property = shape.getProperty(propertyName); if (property != null && property.getLocation() instanceof LongLocation) { return (LongLocation) property.getLocation(); } return null; } /* * As soon as we have seen an object read, we cannot avoid boxing long anymore therefore we can * contain all long cache entries. */ @Specialization(limit = "CACHE_LIMIT", contains = "doCachedLong", guards = "shape.check(receiver)", assumptions = "shape.getValidAssumption()") protected static Object doCachedObject(DynamicObject receiver, // @Cached("receiver.getShape()") Shape shape, // @Cached("shape.getProperty(propertyName)") Property property) { if (property == null) { return SLNull.SINGLETON; } else { return property.get(receiver, shape); } } /* * The generic case is used if the number of shapes accessed overflows the limit. */ @Specialization(contains = "doCachedObject") @TruffleBoundary protected Object doGeneric(DynamicObject receiver, @Cached("new()") LRUPropertyLookup lruCache) { if (!lruCache.shape.check(receiver)) { Shape receiverShape = receiver.getShape(); lruCache.shape = receiverShape; lruCache.property = receiverShape.getProperty(propertyName); } if (lruCache.property != null) { return lruCache.property.get(receiver, true); } else { return SLNull.SINGLETON; } } protected static class LRUPropertyLookup { private Shape shape; private Property property; public LRUPropertyLookup() { } } }