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8bd336a0 | 1 | /* Monotonically increasing wide counters (at least 62 bits). |
6d7e8eda | 2 | Copyright (C) 2016-2023 Free Software Foundation, Inc. |
8bd336a0 FW |
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 | <https://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #ifndef _BITS_ATOMIC_WIDE_COUNTER_H | |
20 | #define _BITS_ATOMIC_WIDE_COUNTER_H | |
21 | ||
22 | /* Counter that is monotonically increasing (by less than 2**31 per | |
23 | increment), with a single writer, and an arbitrary number of | |
24 | readers. */ | |
25 | typedef union | |
26 | { | |
27 | __extension__ unsigned long long int __value64; | |
28 | struct | |
29 | { | |
30 | unsigned int __low; | |
31 | unsigned int __high; | |
32 | } __value32; | |
33 | } __atomic_wide_counter; | |
34 | ||
35 | #endif /* _BITS_ATOMIC_WIDE_COUNTER_H */ |