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/*-
* Copyright (c) 2010 Isilon Systems, Inc.
* Copyright (c) 2010 iX Systems, Inc.
* Copyright (c) 2010 Panasas, Inc.
* Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
* 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 unmodified, 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 AUTHOR ``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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef _ATOMIC_LONG_H_
#define _ATOMIC_LONG_H_
#include <sys/cdefs.h>
#include <sys/types.h>
#include <machine/atomic.h>
typedef struct {
volatile u_long counter;
} atomic_long_t;
#define atomic_long_add(i, v) atomic_long_add_return((i), (v))
#define atomic_long_inc_return(v) atomic_long_add_return(1, (v))
static inline long
atomic_long_add_return(long i, atomic_long_t *v)
{
return i + atomic_fetchadd_long(&v->counter, i);
}
static inline void
atomic_long_set(atomic_long_t *v, long i)
{
atomic_store_rel_long(&v->counter, i);
}
static inline long
atomic_long_read(atomic_long_t *v)
{
return atomic_load_acq_long(&v->counter);
}
static inline long
atomic_long_inc(atomic_long_t *v)
{
return atomic_fetchadd_long(&v->counter, 1) + 1;
}
static inline long
atomic_long_dec(atomic_long_t *v)
{
return atomic_fetchadd_long(&v->counter, -1) - 1;
}
static inline long
atomic_long_dec_and_test(atomic_long_t *v)
{
long i = atomic_long_add(-1, v);
return i == 0 ;
}
#endif /* _ATOMIC_LONG_H_ */
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