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- /* Monotonically increasing wide counters (at least 62 bits).
- Copyright (C) 2016-2026 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <https://www.gnu.org/licenses/>. */
- #ifndef _BITS_ATOMIC_WIDE_COUNTER_H
- #define _BITS_ATOMIC_WIDE_COUNTER_H
- /* Counter that is monotonically increasing (by less than 2**31 per
- increment), with a single writer, and an arbitrary number of
- readers. */
- typedef union
- {
- __extension__ unsigned long long int __value64;
- struct
- {
- unsigned int __low;
- unsigned int __high;
- } __value32;
- } __atomic_wide_counter;
- #endif /* _BITS_ATOMIC_WIDE_COUNTER_H */
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