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annotate graal/com.oracle.nfi/src/com/oracle/nfi/NativeFunctionInterfaceRuntime.java @ 22334:ac7992eb97c8
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author | Josef Eisl <josef.eisl@jku.at> |
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date | Thu, 16 Jul 2015 17:19:46 +0200 |
parents | 3e7ab72bac96 |
children | 05183a084a08 |
rev | line source |
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GNFI: move GNFI interfaces to oracle.nfi - interface does not depend on graal
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1 /* |
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2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.oracle.nfi; |
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24 |
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25 import java.lang.reflect.*; |
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26 |
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27 import com.oracle.nfi.api.*; |
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28 |
16704 | 29 /** |
16705 | 30 * Class for obtaining the {@link NativeFunctionInterface} (if any) provided by the VM. |
16704 | 31 */ |
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32 public final class NativeFunctionInterfaceRuntime { |
16705 | 33 private static final NativeFunctionInterface INSTANCE; |
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34 |
16704 | 35 /** |
16705 | 36 * Gets the {@link NativeFunctionInterface} (if any) provided by the VM. |
37 * | |
38 * @return null if the VM does not provide a {@link NativeFunctionInterface} | |
39 */ | |
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40 public static NativeFunctionInterface getNativeFunctionInterface() { |
16705 | 41 return INSTANCE; |
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42 } |
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43 |
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44 static { |
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45 |
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46 NativeFunctionInterface instance = null; |
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47 |
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48 NativeFunctionInterfaceAccess access = null; |
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49 Class<?> servicesClass = null; |
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50 try { |
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51 servicesClass = Class.forName("jdk.internal.jvmci.service.Services"); |
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52 } catch (ClassNotFoundException e) { |
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53 try { |
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54 // Legacy support |
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55 servicesClass = Class.forName("com.oracle.jvmci.service.Services"); |
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56 } catch (ClassNotFoundException e2) { |
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57 // JVMCI is unavailable |
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58 } |
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59 } |
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60 if (servicesClass != null) { |
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61 try { |
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62 Method m = servicesClass.getDeclaredMethod("loadSingle", Class.class, boolean.class); |
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63 access = (NativeFunctionInterfaceAccess) m.invoke(null, NativeFunctionInterfaceAccess.class, false); |
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64 } catch (Throwable e) { |
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65 // Fail fast for other errors |
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66 throw (InternalError) new InternalError().initCause(e); |
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67 } |
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68 } |
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69 // TODO: try standard ServiceLoader? |
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70 if (access != null) { |
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71 instance = access.getNativeFunctionInterface(); |
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72 } |
16705 | 73 INSTANCE = instance; |
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74 } |
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75 } |