104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
/* 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 _ATOMIC_WIDE_COUNTER_H
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#define _ATOMIC_WIDE_COUNTER_H
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#include <atomic.h>
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#include <bits/atomic_wide_counter.h>
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#if __HAVE_64B_ATOMICS
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static inline uint64_t
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__atomic_wide_counter_load_relaxed (__atomic_wide_counter *c)
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{
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return atomic_load_relaxed (&c->__value64);
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}
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static inline uint64_t
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__atomic_wide_counter_load_acquire (__atomic_wide_counter *c)
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{
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return atomic_load_acquire (&c->__value64);
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}
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static inline uint64_t
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__atomic_wide_counter_fetch_add_relaxed (__atomic_wide_counter *c,
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unsigned int val)
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{
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return atomic_fetch_add_relaxed (&c->__value64, val);
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}
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static inline uint64_t
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__atomic_wide_counter_fetch_add_acquire (__atomic_wide_counter *c,
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unsigned int val)
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{
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return atomic_fetch_add_acquire (&c->__value64, val);
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}
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static inline void
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__atomic_wide_counter_add_relaxed (__atomic_wide_counter *c,
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unsigned int val)
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{
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atomic_store_relaxed (&c->__value64,
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atomic_load_relaxed (&c->__value64) + val);
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}
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static uint64_t __attribute__ ((unused))
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__atomic_wide_counter_fetch_xor_release (__atomic_wide_counter *c,
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unsigned int val)
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{
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return atomic_fetch_xor_release (&c->__value64, val);
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}
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#else /* !__HAVE_64B_ATOMICS */
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uint64_t __atomic_wide_counter_load_relaxed (__atomic_wide_counter *c)
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attribute_hidden;
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static inline uint64_t
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__atomic_wide_counter_load_acquire (__atomic_wide_counter *c)
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{
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uint64_t r = __atomic_wide_counter_load_relaxed (c);
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atomic_thread_fence_acquire ();
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return r;
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}
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uint64_t __atomic_wide_counter_fetch_add_relaxed (__atomic_wide_counter *c,
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unsigned int op)
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attribute_hidden;
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static inline uint64_t
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__atomic_wide_counter_fetch_add_acquire (__atomic_wide_counter *c,
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unsigned int val)
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{
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uint64_t r = __atomic_wide_counter_fetch_add_relaxed (c, val);
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atomic_thread_fence_acquire ();
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return r;
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}
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static inline void
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__atomic_wide_counter_add_relaxed (__atomic_wide_counter *c,
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unsigned int val)
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{
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__atomic_wide_counter_fetch_add_relaxed (c, val);
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}
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#endif /* !__HAVE_64B_ATOMICS */
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#endif /* _ATOMIC_WIDE_COUNTER_H */
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