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annotate graal/com.oracle.nfi/src/com/oracle/nfi/NativeFunctionInterfaceRuntime.java @ 21404:cfc632ba7689

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Merge
author Stefan Anzinger <stefan.anzinger@oracle.com>
date Fri, 15 May 2015 14:48:18 +0200
parents 13f8c249edb8
children 2f92172fa320
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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 com.oracle.nfi.api.*;
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26
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27 /**
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28 * Class for obtaining the {@link NativeFunctionInterface} (if any) provided by the VM.
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29 */
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30 public final class NativeFunctionInterfaceRuntime {
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31 private static final NativeFunctionInterface INSTANCE;
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32
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33 /**
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34 * Creates a new {@link NativeFunctionInterface}.
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35 *
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36 * @throws UnsatisfiedLinkError if not running on a VM that provides a
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37 * {@link NativeFunctionInterface}
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38 */
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39 private static native NativeFunctionInterface createInterface();
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40
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41 /**
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42 * Gets the {@link NativeFunctionInterface} (if any) provided by the VM.
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43 *
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44 * @return null if the VM does not provide a {@link NativeFunctionInterface}
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45 */
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46 public static NativeFunctionInterface getNativeFunctionInterface() {
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47 return INSTANCE;
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48 }
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49
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50 static {
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51 NativeFunctionInterface instance;
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52 try {
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53 instance = createInterface();
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54 } catch (UnsatisfiedLinkError e) {
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55 instance = null;
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56 }
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57 INSTANCE = instance;
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58 }
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59 }