/* atomic.h: These really suck for now.
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/* atomic.h: These really suck for now.
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*
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*
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* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
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*/
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*/
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#ifndef __ARCH_SPARC_ATOMIC__
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#ifndef __ARCH_SPARC_ATOMIC__
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#define __ARCH_SPARC_ATOMIC__
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#define __ARCH_SPARC_ATOMIC__
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#ifdef __SMP__
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#ifdef __SMP__
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#include <asm/smp.h>
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#include <asm/smp.h>
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#include <asm/smp_lock.h>
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#include <asm/smp_lock.h>
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#endif
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#endif
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typedef int atomic_t;
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typedef int atomic_t;
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static __inline__ void atomic_add(atomic_t i, atomic_t *v)
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static __inline__ void atomic_add(atomic_t i, atomic_t *v)
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{
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{
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unsigned long flags;
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unsigned long flags;
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save_flags(flags); cli();
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save_flags(flags); cli();
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*v += i;
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*v += i;
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restore_flags(flags);
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restore_flags(flags);
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}
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}
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static __inline__ void atomic_sub(atomic_t i, atomic_t *v)
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static __inline__ void atomic_sub(atomic_t i, atomic_t *v)
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{
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{
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unsigned long flags;
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unsigned long flags;
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save_flags(flags); cli();
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save_flags(flags); cli();
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*v -= i;
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*v -= i;
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restore_flags(flags);
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restore_flags(flags);
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}
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}
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static __inline__ int atomic_sub_and_test(atomic_t i, atomic_t *v)
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static __inline__ int atomic_sub_and_test(atomic_t i, atomic_t *v)
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{
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{
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unsigned long flags, result;
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unsigned long flags, result;
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save_flags(flags); cli();
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save_flags(flags); cli();
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*v -= i;
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*v -= i;
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result = (*v == 0);
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result = (*v == 0);
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restore_flags(flags);
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restore_flags(flags);
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return result;
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return result;
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}
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}
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static __inline__ void atomic_inc(atomic_t *v)
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static __inline__ void atomic_inc(atomic_t *v)
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{
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{
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atomic_add(1, v);
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atomic_add(1, v);
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}
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}
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static __inline__ void atomic_dec(atomic_t *v)
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static __inline__ void atomic_dec(atomic_t *v)
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{
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{
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atomic_sub(1, v);
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atomic_sub(1, v);
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}
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}
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static __inline__ int atomic_dec_and_test(atomic_t *v)
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static __inline__ int atomic_dec_and_test(atomic_t *v)
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{
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{
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return atomic_sub_and_test(1, v);
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return atomic_sub_and_test(1, v);
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}
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}
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#endif /* !(__ARCH_SPARC_ATOMIC__) */
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#endif /* !(__ARCH_SPARC_ATOMIC__) */
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