Mercurial > hg > graal-jvmci-8
diff graal/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/Accessor.java @ 21468:99942eac9c6d
Introducing TruffleVM - a central place to invoke code in any registered TruffleLanguage.
author | Jaroslav Tulach <jaroslav.tulach@oracle.com> |
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date | Fri, 22 May 2015 13:41:10 +0200 |
parents | |
children | bb51b9a142b3 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/Accessor.java Fri May 22 13:41:10 2015 +0200 @@ -0,0 +1,106 @@ +/* + * Copyright (c) 2014, 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 com.oracle.truffle.api.impl; + +import com.oracle.truffle.api.TruffleLanguage; +import com.oracle.truffle.api.TruffleLanguage.Env; +import com.oracle.truffle.api.vm.TruffleVM; +import com.oracle.truffle.api.source.Source; +import java.io.IOException; +import java.util.ServiceLoader; + +/** + * Communication between TruffleVM and TruffleLanguage API/SPI. + */ +public abstract class Accessor { + private static Accessor API; + private static Accessor SPI; + static { + TruffleLanguage lng = new TruffleLanguage() { + @Override + protected Object eval(Source code) throws IOException { + return null; + } + + @Override + protected Object findExportedSymbol(String globalName) { + return null; + } + + @Override + protected Object getLanguageGlobal() { + return null; + } + + @Override + protected boolean isObjectOfLanguage(Object object) { + return false; + } + }; + lng.hashCode(); + } + + protected Accessor() { + if (this.getClass().getSimpleName().endsWith("API")) { + if (API != null) { + throw new IllegalStateException(); + } + API = this; + } else { + if (SPI != null) { + throw new IllegalStateException(); + } + SPI = this; + } + } + + protected Env attachEnv(TruffleVM vm, TruffleLanguage l) { + return API.attachEnv(vm, l); + } + + protected Object eval(TruffleLanguage l, Source s) throws IOException { + return API.eval(l, s); + } + + protected Object importSymbol(TruffleVM vm, TruffleLanguage queryingLang, String globalName) { + return SPI.importSymbol(vm, queryingLang, globalName); + } + + protected Object findExportedSymbol(TruffleLanguage l, String globalName) { + return API.findExportedSymbol(l, globalName); + } + + protected Object languageGlobal(TruffleLanguage l) { + return API.languageGlobal(l); + } + + protected Object invoke(Object obj, Object[] args) throws IOException { + for (SymbolInvoker si : ServiceLoader.load(SymbolInvoker.class)) { + return si.invoke(obj, args); + } + throw new IOException("No symbol invoker found!"); + } + +}