Mercurial > hg > truffle
view truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/Truffle.java @ 22157:dc83cc1f94f2
Using fully qualified imports
author | Jaroslav Tulach <jaroslav.tulach@oracle.com> |
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date | Wed, 16 Sep 2015 11:33:22 +0200 |
parents | 8b72dfac5cc7 |
children | 9c108011f794 |
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/* * Copyright (c) 2012, 2012, 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; import com.oracle.truffle.api.impl.DefaultTruffleRuntime; import java.lang.reflect.Method; import java.security.AccessController; import java.security.PrivilegedAction; /** * Class for obtaining the Truffle runtime singleton object of this virtual machine. */ public class Truffle { private static final TruffleRuntime RUNTIME = initRuntime(); /** * Gets the singleton {@link TruffleRuntime} object. */ public static TruffleRuntime getRuntime() { return RUNTIME; } private static TruffleRuntime initRuntime() { return AccessController.doPrivileged(new PrivilegedAction<TruffleRuntime>() { public TruffleRuntime run() { String runtimeClassName = System.getProperty("truffle.TruffleRuntime"); if (runtimeClassName != null) { try { ClassLoader cl = Thread.currentThread().getContextClassLoader(); Class<?> runtimeClass = Class.forName(runtimeClassName, false, cl); return (TruffleRuntime) runtimeClass.newInstance(); } catch (Throwable e) { // Fail fast for other errors throw (InternalError) new InternalError().initCause(e); } } TruffleRuntimeAccess access = null; Class<?> servicesClass = null; try { servicesClass = Class.forName("jdk.internal.jvmci.service.Services"); } catch (ClassNotFoundException e) { } if (servicesClass == null) { try { servicesClass = Class.forName("com.oracle.jvmci.service.Services"); } catch (ClassNotFoundException e) { // JVMCI is unavailable } } if (servicesClass != null) { try { Method m = servicesClass.getDeclaredMethod("loadSingle", Class.class, boolean.class); access = (TruffleRuntimeAccess) m.invoke(null, TruffleRuntimeAccess.class, false); } catch (Throwable e) { // Fail fast for other errors throw (InternalError) new InternalError().initCause(e); } } // TODO: try standard ServiceLoader? if (access != null) { return access.getRuntime(); } return new DefaultTruffleRuntime(); } }); } }