blob: 15160d660ef9fbffbd1db6cee3b0291cddfc355a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2016 Joyent, Inc.
* Copyright 2022 Oxide Computer Company
*/
#ifndef _STDALIGN_H
#define _STDALIGN_H
/*
* ISO/IEC C11 stdalign.h. This header is meant to provide definitions for the
* alignas and alignof 'keywords' into the underlying compiler-understood value.
* In addition, there are two macros that are meant to define that this process
* has happened. C++11 added alignas/alignof as keywords and including this
* header is meant to cause us to still have the _is_defined macros, but not
* define this overall.
*
* Unlike other cases we don't use any symbol guards here (other than C++) and
* just allow the implementation to either have _Alignas and _Alignof or not
* have it and lead to a compiler error for the user. The main justification of
* this is that this header is only defined in C11 (and newer). It's not defined
* in other standards and just as if you include a non-standard header, in this
* case we don't try to stop that (same as if you included something like
* libdevinfo.h).
*/
#ifdef __cplusplus
extern "C" {
#endif
#ifndef __cplusplus
#define alignas _Alignas
#define alignof _Alignof
#endif /* !__cplusplus */
#define __alignas_is_defined 1
#define __alignof_is_defined 1
#ifdef __cplusplus
}
#endif
#endif /* _STDALIGN_H */
|
