mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 01:33:36 +08:00
104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
/* Monotonically increasing wide counters (at least 62 bits).
|
|
Copyright (C) 2016-2024 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_load_acquire (__atomic_wide_counter *c)
|
|
{
|
|
return atomic_load_acquire (&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;
|
|
|
|
static inline uint64_t
|
|
__atomic_wide_counter_load_acquire (__atomic_wide_counter *c)
|
|
{
|
|
uint64_t r = __atomic_wide_counter_load_relaxed (c);
|
|
atomic_thread_fence_acquire ();
|
|
return r;
|
|
}
|
|
|
|
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 */
|