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4e61a6be | 1 | /* Define MALLOC_ALIGNMENT for malloc. Generic version. |
04277e02 | 2 | Copyright (C) 2017-2019 Free Software Foundation, Inc. |
4e61a6be L |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #ifndef _GENERIC_MALLOC_ALIGNMENT_H | |
20 | #define _GENERIC_MALLOC_ALIGNMENT_H | |
21 | ||
22 | /* MALLOC_ALIGNMENT is the minimum alignment for malloc'ed chunks. It | |
23 | must be a power of two at least 2 * SIZE_SZ, even on machines for | |
24 | which smaller alignments would suffice. It may be defined as larger | |
25 | than this though. Note however that code and data structures are | |
26 | optimized for the case of 8-byte alignment. */ | |
27 | #define MALLOC_ALIGNMENT (2 * SIZE_SZ < __alignof__ (long double) \ | |
28 | ? __alignof__ (long double) : 2 * SIZE_SZ) | |
29 | ||
30 | ||
31 | #endif /* !defined(_GENERIC_MALLOC_ALIGNMENT_H) */ |