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/* Monotonically increasing wide counters (at least 62 bits).
Copyright (C) 2016-2021 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 _ATOMIC_WIDE_COUNTER_H
#define _ATOMIC_WIDE_COUNTER_H
#include <atomic.h>
#include <bits/atomic_wide_counter.h>
#if __HAVE_64B_ATOMICS
static inline uint64_t
__atomic_wide_counter_load_relaxed (__atomic_wide_counter *c)
{
return atomic_load_relaxed (&c->__value64);
}
static inline uint64_t
__atomic_wide_counter_fetch_add_relaxed (__atomic_wide_counter *c,
unsigned int val)
{
return atomic_fetch_add_relaxed (&c->__value64, val);
}
static inline uint64_t
__atomic_wide_counter_fetch_add_acquire (__atomic_wide_counter *c,
unsigned int val)
{
return atomic_fetch_add_acquire (&c->__value64, val);
}
static inline void
__atomic_wide_counter_add_relaxed (__atomic_wide_counter *c,
unsigned int val)
{
atomic_store_relaxed (&c->__value64,
atomic_load_relaxed (&c->__value64) + val);
}
static uint64_t __attribute__ ((unused))
__atomic_wide_counter_fetch_xor_release (__atomic_wide_counter *c,
unsigned int val)
{
return atomic_fetch_xor_release (&c->__value64, val);
}
#else /* !__HAVE_64B_ATOMICS */
uint64_t __atomic_wide_counter_load_relaxed (__atomic_wide_counter *c)
attribute_hidden;
uint64_t __atomic_wide_counter_fetch_add_relaxed (__atomic_wide_counter *c,
unsigned int op)
attribute_hidden;
static inline uint64_t
__atomic_wide_counter_fetch_add_acquire (__atomic_wide_counter *c,
unsigned int val)
{
uint64_t r = __atomic_wide_counter_fetch_add_relaxed (c, val);
atomic_thread_fence_acquire ();
return r;
}
static inline void
__atomic_wide_counter_add_relaxed (__atomic_wide_counter *c,
unsigned int val)
{
__atomic_wide_counter_fetch_add_relaxed (c, val);
}
#endif /* !__HAVE_64B_ATOMICS */
#endif /* _ATOMIC_WIDE_COUNTER_H */
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