mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2025-10-26 18:05:04 +03:00
865ca576ab
Sponsored-by: https://despairlabs.com/sponsor/ Signed-off-by: Rob Norris <robn@despairlabs.com> Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
122 lines
3.0 KiB
C
122 lines
3.0 KiB
C
// SPDX-License-Identifier: BSD-2-Clause
|
|
/*
|
|
* Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/atomic.h>
|
|
|
|
#if !defined(__LP64__) && !defined(__mips_n32) && \
|
|
!defined(ARM_HAVE_ATOMIC64) && !defined(I386_HAVE_ATOMIC64) && \
|
|
!defined(HAS_EMULATED_ATOMIC64)
|
|
|
|
#ifdef _KERNEL
|
|
#include <sys/kernel.h>
|
|
|
|
struct mtx atomic_mtx;
|
|
MTX_SYSINIT(atomic, &atomic_mtx, "atomic", MTX_DEF);
|
|
#else
|
|
#include <pthread.h>
|
|
|
|
#define mtx_lock(lock) pthread_mutex_lock(lock)
|
|
#define mtx_unlock(lock) pthread_mutex_unlock(lock)
|
|
|
|
static pthread_mutex_t atomic_mtx;
|
|
|
|
static __attribute__((constructor)) void
|
|
atomic_init(void)
|
|
{
|
|
pthread_mutex_init(&atomic_mtx, NULL);
|
|
}
|
|
#endif
|
|
|
|
void
|
|
atomic_add_64(volatile uint64_t *target, int64_t delta)
|
|
{
|
|
|
|
mtx_lock(&atomic_mtx);
|
|
*target += delta;
|
|
mtx_unlock(&atomic_mtx);
|
|
}
|
|
|
|
void
|
|
atomic_dec_64(volatile uint64_t *target)
|
|
{
|
|
|
|
mtx_lock(&atomic_mtx);
|
|
*target -= 1;
|
|
mtx_unlock(&atomic_mtx);
|
|
}
|
|
|
|
uint64_t
|
|
atomic_swap_64(volatile uint64_t *a, uint64_t value)
|
|
{
|
|
uint64_t ret;
|
|
|
|
mtx_lock(&atomic_mtx);
|
|
ret = *a;
|
|
*a = value;
|
|
mtx_unlock(&atomic_mtx);
|
|
return (ret);
|
|
}
|
|
|
|
uint64_t
|
|
atomic_load_64(volatile uint64_t *a)
|
|
{
|
|
uint64_t ret;
|
|
|
|
mtx_lock(&atomic_mtx);
|
|
ret = *a;
|
|
mtx_unlock(&atomic_mtx);
|
|
return (ret);
|
|
}
|
|
|
|
uint64_t
|
|
atomic_add_64_nv(volatile uint64_t *target, int64_t delta)
|
|
{
|
|
uint64_t newval;
|
|
|
|
mtx_lock(&atomic_mtx);
|
|
newval = (*target += delta);
|
|
mtx_unlock(&atomic_mtx);
|
|
return (newval);
|
|
}
|
|
|
|
uint64_t
|
|
atomic_cas_64(volatile uint64_t *target, uint64_t cmp, uint64_t newval)
|
|
{
|
|
uint64_t oldval;
|
|
|
|
mtx_lock(&atomic_mtx);
|
|
oldval = *target;
|
|
if (oldval == cmp)
|
|
*target = newval;
|
|
mtx_unlock(&atomic_mtx);
|
|
return (oldval);
|
|
}
|
|
#endif
|