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Diffstat (limited to 'gl/alignof.h')
-rw-r--r-- | gl/alignof.h | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/gl/alignof.h b/gl/alignof.h deleted file mode 100644 index 240468c..0000000 --- a/gl/alignof.h +++ /dev/null | |||
@@ -1,53 +0,0 @@ | |||
1 | /* Determine alignment of types. | ||
2 | Copyright (C) 2003-2004, 2006, 2009-2010 Free Software Foundation, Inc. | ||
3 | |||
4 | This program is free software; you can redistribute it and/or modify | ||
5 | it under the terms of the GNU General Public License as published by | ||
6 | the Free Software Foundation; either version 3, or (at your option) | ||
7 | any later version. | ||
8 | |||
9 | This program is distributed in the hope that it will be useful, | ||
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
12 | GNU General Public License for more details. | ||
13 | |||
14 | You should have received a copy of the GNU General Public License | ||
15 | along with this program; if not, write to the Free Software Foundation, | ||
16 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ | ||
17 | |||
18 | #ifndef _ALIGNOF_H | ||
19 | #define _ALIGNOF_H | ||
20 | |||
21 | #include <stddef.h> | ||
22 | |||
23 | /* Determine the alignment of a structure slot (field) of a given type, | ||
24 | at compile time. Note that the result depends on the ABI. | ||
25 | Note: The result cannot be used as a value for an 'enum' constant, | ||
26 | due to bugs in HP-UX 10.20 cc and AIX 3.2.5 xlc. */ | ||
27 | #if defined __cplusplus | ||
28 | template <class type> struct alignof_helper { char __slot1; type __slot2; }; | ||
29 | # define alignof_slot(type) offsetof (alignof_helper<type>, __slot2) | ||
30 | #else | ||
31 | # define alignof_slot(type) offsetof (struct { char __slot1; type __slot2; }, __slot2) | ||
32 | #endif | ||
33 | |||
34 | /* Determine the good alignment of a object of the given type at compile time. | ||
35 | Note that this is not necessarily the same as alignof_slot(type). | ||
36 | For example, with GNU C on x86 platforms: alignof_type(double) = 8, but | ||
37 | - when -malign-double is not specified: alignof_slot(double) = 4, | ||
38 | - when -malign-double is specified: alignof_slot(double) = 8. | ||
39 | Note: The result cannot be used as a value for an 'enum' constant, | ||
40 | due to bugs in HP-UX 10.20 cc and AIX 3.2.5 xlc. */ | ||
41 | #if defined __GNUC__ | ||
42 | # define alignof_type __alignof__ | ||
43 | #else | ||
44 | # define alignof_type alignof_slot | ||
45 | #endif | ||
46 | |||
47 | /* alignof is an alias for alignof_slot semantics, since that's what most | ||
48 | callers need. | ||
49 | Note: The result cannot be used as a value for an 'enum' constant, | ||
50 | due to bugs in HP-UX 10.20 cc and AIX 3.2.5 xlc. */ | ||
51 | #define alignof alignof_slot | ||
52 | |||
53 | #endif /* _ALIGNOF_H */ | ||