HotSpotGraalJVMCIServiceLocator.java revision 13083:b9a173f12fe6 
1/*
2 * Copyright (c) 2015, 2016, 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23package org.graalvm.compiler.hotspot;
24
25import org.graalvm.compiler.serviceprovider.ServiceProvider;
26
27import jdk.vm.ci.hotspot.HotSpotVMEventListener;
28import jdk.vm.ci.runtime.JVMCICompilerFactory;
29import jdk.vm.ci.services.JVMCIServiceLocator;
30
31@ServiceProvider(JVMCIServiceLocator.class)
32public final class HotSpotGraalJVMCIServiceLocator extends JVMCIServiceLocator {
33
34    /**
35     * Holds the state shared between all {@link HotSpotGraalJVMCIServiceLocator} instances. This is
36     * necessary as a service provider instance is created each time the service is loaded.
37     */
38    private static final class Shared {
39        static final Shared SINGLETON = new Shared();
40
41        <T> T getProvider(Class<T> service, HotSpotGraalJVMCIServiceLocator locator) {
42            if (service == JVMCICompilerFactory.class) {
43                return service.cast(new HotSpotGraalCompilerFactory(locator));
44            } else if (service == HotSpotVMEventListener.class) {
45                if (graalRuntime != null) {
46                    return service.cast(new HotSpotGraalVMEventListener(graalRuntime));
47                }
48            }
49            return null;
50        }
51
52        private HotSpotGraalRuntime graalRuntime;
53
54        /**
55         * Notifies this object of the compiler created via {@link HotSpotGraalJVMCIServiceLocator}.
56         */
57        void onCompilerCreation(HotSpotGraalCompiler compiler) {
58            assert this.graalRuntime == null : "only expect a single JVMCICompiler to be created";
59            this.graalRuntime = (HotSpotGraalRuntime) compiler.getGraalRuntime();
60        }
61    }
62
63    @Override
64    public <T> T getProvider(Class<T> service) {
65        return Shared.SINGLETON.getProvider(service, this);
66    }
67
68    /**
69     * Notifies this object of the compiler created via {@link HotSpotGraalJVMCIServiceLocator}.
70     */
71    @SuppressWarnings("static-method")
72    void onCompilerCreation(HotSpotGraalCompiler compiler) {
73        Shared.SINGLETON.onCompilerCreation(compiler);
74    }
75}
76