68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
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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
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* stuff.
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*
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* Copyright (C) 1996, 1997, 2000, 2012 David S. Miller (davem@redhat.com)
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*/
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#ifndef __ARCH_SPARC64_ATOMIC__
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#define __ARCH_SPARC64_ATOMIC__
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#include <linux/types.h>
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#include <asm/cmpxchg.h>
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#include <asm/barrier.h>
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#define ATOMIC_INIT(i) { (i) }
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#define ATOMIC64_INIT(i) { (i) }
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#define atomic_read(v) READ_ONCE((v)->counter)
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#define atomic64_read(v) READ_ONCE((v)->counter)
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#define atomic_set(v, i) WRITE_ONCE(((v)->counter), (i))
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#define atomic64_set(v, i) WRITE_ONCE(((v)->counter), (i))
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#define ATOMIC_OP(op) \
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void atomic_##op(int, atomic_t *); \
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void atomic64_##op(long, atomic64_t *);
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#define ATOMIC_OP_RETURN(op) \
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int atomic_##op##_return(int, atomic_t *); \
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long atomic64_##op##_return(long, atomic64_t *);
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#define ATOMIC_FETCH_OP(op) \
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int atomic_fetch_##op(int, atomic_t *); \
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long atomic64_fetch_##op(long, atomic64_t *);
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#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) ATOMIC_FETCH_OP(op)
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ATOMIC_OPS(add)
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ATOMIC_OPS(sub)
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#undef ATOMIC_OPS
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#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)
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ATOMIC_OPS(and)
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ATOMIC_OPS(or)
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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
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#undef ATOMIC_OP
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#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)
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{
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return xchg(&v->counter, new);
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}
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#define atomic64_cmpxchg(v, o, n) \
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((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n)))
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#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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#define atomic64_dec_if_positive atomic64_dec_if_positive
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#endif /* !(__ARCH_SPARC64_ATOMIC__) */
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