1 /*
 2  * Copyright (c) 2020, 2023, 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.  Oracle designates this
 8  * particular file as subject to the "Classpath" exception as provided
 9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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24  */
25 package jdk.internal.foreign.abi.x64.windows;
26 
27 import jdk.internal.foreign.abi.AbstractLinker;
28 import jdk.internal.foreign.abi.LinkerOptions;
29 
30 import java.lang.foreign.FunctionDescriptor;
31 import java.lang.invoke.MethodHandle;
32 import java.lang.invoke.MethodType;
33 import java.nio.ByteOrder;
34 
35 /**
36  * ABI implementation based on Windows ABI AMD64 supplement v.0.99.6
37  */
38 public final class Windowsx64Linker extends AbstractLinker {
39 
40     public static Windowsx64Linker getInstance() {
41         final class Holder {
42             private static final Windowsx64Linker INSTANCE = new Windowsx64Linker();
43         }
44 
45         return Holder.INSTANCE;
46     }
47 
48     private Windowsx64Linker() {
49         // Ensure there is only one instance
50     }
51 
52     @Override
53     protected MethodHandle arrangeDowncall(MethodType inferredMethodType, FunctionDescriptor function, LinkerOptions options) {
54         return CallArranger.arrangeDowncall(inferredMethodType, function, options);
55     }
56 
57     @Override
58     protected UpcallStubFactory arrangeUpcall(MethodType targetType, FunctionDescriptor function, LinkerOptions options) {
59         return CallArranger.arrangeUpcall(targetType, function, options);
60     }
61 
62     @Override
63     protected ByteOrder linkerByteOrder() {
64         return ByteOrder.LITTLE_ENDIAN;
65     }
66 }