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comparison graal/com.oracle.nfi/src/com/oracle/nfi/NativeFunctionInterfaceRuntime.java @ 21614:2f92172fa320

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Truffle and NFI implementations are now accessed via JVMCI services instead of being hard coded in the VM (JBS:GRAAL-51)
author Doug Simon <doug.simon@oracle.com>
date Sun, 31 May 2015 13:42:47 +0200
parents 13f8c249edb8
children 91b861398ad6
comparison
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21613:60154926b513 21614:2f92172fa320
20 * or visit www.oracle.com if you need additional information or have any 20 * or visit www.oracle.com if you need additional information or have any
21 * questions. 21 * questions.
22 */ 22 */
23 package com.oracle.nfi; 23 package com.oracle.nfi;
24 24
25 import com.oracle.jvmci.service.*;
25 import com.oracle.nfi.api.*; 26 import com.oracle.nfi.api.*;
26 27
27 /** 28 /**
28 * Class for obtaining the {@link NativeFunctionInterface} (if any) provided by the VM. 29 * Class for obtaining the {@link NativeFunctionInterface} (if any) provided by the VM.
29 */ 30 */
30 public final class NativeFunctionInterfaceRuntime { 31 public final class NativeFunctionInterfaceRuntime {
31 private static final NativeFunctionInterface INSTANCE; 32 private static final NativeFunctionInterface INSTANCE;
32
33 /**
34 * Creates a new {@link NativeFunctionInterface}.
35 *
36 * @throws UnsatisfiedLinkError if not running on a VM that provides a
37 * {@link NativeFunctionInterface}
38 */
39 private static native NativeFunctionInterface createInterface();
40 33
41 /** 34 /**
42 * Gets the {@link NativeFunctionInterface} (if any) provided by the VM. 35 * Gets the {@link NativeFunctionInterface} (if any) provided by the VM.
43 * 36 *
44 * @return null if the VM does not provide a {@link NativeFunctionInterface} 37 * @return null if the VM does not provide a {@link NativeFunctionInterface}
46 public static NativeFunctionInterface getNativeFunctionInterface() { 39 public static NativeFunctionInterface getNativeFunctionInterface() {
47 return INSTANCE; 40 return INSTANCE;
48 } 41 }
49 42
50 static { 43 static {
51 NativeFunctionInterface instance; 44
52 try { 45 NativeFunctionInterface instance = null;
53 instance = createInterface(); 46 NativeFunctionInterfaceAccess access = Services.loadSingle(NativeFunctionInterfaceAccess.class, false);
54 } catch (UnsatisfiedLinkError e) { 47 if (access != null) {
55 instance = null; 48 instance = access.getNativeFunctionInterface();
56 } 49 }
57 INSTANCE = instance; 50 INSTANCE = instance;
58 } 51 }
59 } 52 }