1 /*
 2  * Copyright (c) 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.
 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  */
23 
24 #include <errno.h>
25 
26 #ifdef _WIN64
27 #define EXPORT __declspec(dllexport)
28 #else
29 #define EXPORT
30 #endif
31 
32 EXPORT void empty() {}
33 
34 EXPORT int identity(int value) {
35     return value;
36 }
37 
38 // 128 bit struct returned in buffer on SysV
39 struct Big {
40     long long x;
41     long long y;
42 };
43 
44 EXPORT struct Big with_return_buffer() {
45     struct Big b;
46     b.x = 10;
47     b.y = 11;
48     return b;
49 }
50 
51 EXPORT void do_upcall(void(*f)(void)) {
52     f();
53 }