36 lines
1.3 KiB
C
36 lines
1.3 KiB
C
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/* Monotonically increasing wide counters (at least 62 bits).
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Copyright (C) 2016-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _BITS_ATOMIC_WIDE_COUNTER_H
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#define _BITS_ATOMIC_WIDE_COUNTER_H
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/* Counter that is monotonically increasing (by less than 2**31 per
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increment), with a single writer, and an arbitrary number of
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readers. */
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typedef union
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{
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__extension__ unsigned long long int __value64;
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struct
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{
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unsigned int __low;
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unsigned int __high;
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} __value32;
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} __atomic_wide_counter;
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#endif /* _BITS_ATOMIC_WIDE_COUNTER_H */
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