1 /*
 2  * Copyright (c) 2019, 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 #ifdef _WIN64
25   #ifdef IMPL
26     #define EXPORT __declspec(dllexport)
27   #else
28     #define EXPORT __declspec(dllimport)
29   #endif // IMPL
30 #else
31 #define EXPORT
32 #endif //_WIN64
33 
34 #ifdef _WIN32
35 // Windows doesn't really support asm symbol, this is similar approach for C code to
36 // achieve similar, but this won't work with Panama until we support such Macro
37 #ifdef ADD
38 #define foo fooA
39 #define func funcA
40 #else
41 #define foo fooB
42 #define func funcB
43 #endif //ADD
44 #define ALIAS(sym)
45 
46 #elif __APPLE__
47 #define ALIAS(sym) __asm("_" #sym)
48 #else
49 #define ALIAS(sym) __asm__(#sym)
50 #endif // _WIN32
51 
52 // We do 3 declarations to make sure we will pick up alias no matter the sequence of encounter
53 // Without alias
54 EXPORT extern int foo;
55 EXPORT int func (int x, int y);
56 
57 // With alias
58 #ifdef ADD
59 
60 EXPORT extern int foo ALIAS(fooA);
61 EXPORT int func (int x, int y) ALIAS(funcA);
62 
63 #else
64 
65 EXPORT extern int foo ALIAS(fooB);
66 EXPORT int func (int x, int y) ALIAS(funcB);
67 
68 #endif // ADD
69 
70 // Without alias again
71 EXPORT extern int foo;
72 EXPORT int func (int x, int y);
73