1 /* Monotonically increasing wide counters (at least 62 bits).
2    Copyright (C) 2016-2022 Free Software Foundation, Inc.
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 */
36