atomic_64.h 2.1 KB
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/* SPDX-License-Identifier: GPL-2.0 */
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/* atomic.h: Thankfully the V9 is at least reasonable for this
 *           stuff.
 *
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 * Copyright (C) 1996, 1997, 2000, 2012 David S. Miller (davem@redhat.com)
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 */

#ifndef __ARCH_SPARC64_ATOMIC__
#define __ARCH_SPARC64_ATOMIC__

#include <linux/types.h>
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#include <asm/cmpxchg.h>
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Peter Zijlstra 已提交
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#include <asm/barrier.h>
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#define ATOMIC_INIT(i)		{ (i) }
#define ATOMIC64_INIT(i)	{ (i) }

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#define atomic_read(v)		READ_ONCE((v)->counter)
#define atomic64_read(v)	READ_ONCE((v)->counter)
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#define atomic_set(v, i)	WRITE_ONCE(((v)->counter), (i))
#define atomic64_set(v, i)	WRITE_ONCE(((v)->counter), (i))
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#define ATOMIC_OP(op)							\
void atomic_##op(int, atomic_t *);					\
void atomic64_##op(long, atomic64_t *);
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#define ATOMIC_OP_RETURN(op)						\
int atomic_##op##_return(int, atomic_t *);				\
long atomic64_##op##_return(long, atomic64_t *);
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#define ATOMIC_FETCH_OP(op)						\
int atomic_fetch_##op(int, atomic_t *);					\
long atomic64_fetch_##op(long, atomic64_t *);

#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) ATOMIC_FETCH_OP(op)
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ATOMIC_OPS(add)
ATOMIC_OPS(sub)
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#undef ATOMIC_OPS
#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)

ATOMIC_OPS(and)
ATOMIC_OPS(or)
ATOMIC_OPS(xor)
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#undef ATOMIC_OPS
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#undef ATOMIC_FETCH_OP
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#undef ATOMIC_OP_RETURN
#undef ATOMIC_OP
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#define atomic_dec_return(v)   atomic_sub_return(1, v)
#define atomic64_dec_return(v) atomic64_sub_return(1, v)

#define atomic_inc_return(v)   atomic_add_return(1, v)
#define atomic64_inc_return(v) atomic64_add_return(1, v)
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#define atomic_inc(v) atomic_add(1, v)
#define atomic64_inc(v) atomic64_add(1, v)

#define atomic_dec(v) atomic_sub(1, v)
#define atomic64_dec(v) atomic64_sub(1, v)

#define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n)))
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static inline int atomic_xchg(atomic_t *v, int new)
{
	return xchg(&v->counter, new);
}
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#define atomic64_cmpxchg(v, o, n) \
	((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n)))
#define atomic64_xchg(v, new) (xchg(&((v)->counter), new))

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long atomic64_dec_if_positive(atomic64_t *v);
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#endif /* !(__ARCH_SPARC64_ATOMIC__) */