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/* $Id: atomic.h,v 1.22 2001/07/11 23:56:07 davem Exp $
* atomic.h: Thankfully the V9 is at least reasonable for this
* stuff.
*
* Copyright (C) 1996, 1997, 2000 David S. Miller (davem@redhat.com)
*/
#ifndef __ARCH_SPARC64_ATOMIC__
#define __ARCH_SPARC64_ATOMIC__
typedef struct { volatile int counter; } atomic_t;
#define ATOMIC_INIT(i) { (i) }
#define atomic_read(v) ((v)->counter)
#define atomic_set(v, i) (((v)->counter) = i)
extern int __atomic_add(int, atomic_t *);
extern int __atomic_sub(int, atomic_t *);
#define atomic_add(i, v) ((void)__atomic_add(i, v))
#define atomic_sub(i, v) ((void)__atomic_sub(i, v))
#define atomic_dec_return(v) __atomic_sub(1, v)
#define atomic_inc_return(v) __atomic_add(1, v)
#define atomic_sub_and_test(i, v) (__atomic_sub(i, v) == 0)
#define atomic_dec_and_test(v) (__atomic_sub(1, v) == 0)
#define atomic_inc(v) ((void)__atomic_add(1, v))
#define atomic_dec(v) ((void)__atomic_sub(1, v))
/* Atomic operations are already serializing */
#define smp_mb__before_atomic_dec() barrier()
#define smp_mb__after_atomic_dec() barrier()
#define smp_mb__before_atomic_inc() barrier()
#define smp_mb__after_atomic_inc() barrier()
#endif /* !(__ARCH_SPARC64_ATOMIC__) */
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