#ifndef _ASM_IA64_ATOMIC_H#define _ASM_IA64_ATOMIC_H /* * Atomic operations that C can't guarantee us.  Useful for * resource counting etc.. * * NOTE: don't mess with the types below!  The "unsigned long" and * "int" types were carefully placed so as to ensure proper operation * of the macros. * * Copyright (C) 1998, 1999, 2002-2003 Hewlett-Packard Co *	David Mosberger-Tang <davidm@hpl.hp.com> */#include <linux/types.h> #include <asm/intrinsics.h> /* * On IA-64, counter must always be volatile to ensure that that the * memory accesses are ordered. */typedef struct { volatile __s32 counter; } atomic_t;typedef struct { volatile __s64 counter; } atomic64_t; #define ATOMIC_INIT(i)		((atomic_t) { (i) })#define ATOMIC64_INIT(i)	((atomic64_t) { (i) }) #define atomic_read(v)		((v)->counter)#define atomic64_read(v)	((v)->counter) #define atomic_set(v,i)		(((v)->counter) = (i))#define atomic64_set(v,i)	(((v)->counter) = (i)) static __inline__ intia64_atomic_add (int i, atomic_t *v){	__s32 old, new;	CMPXCHG_BUGCHECK_DECL 	do {		CMPXCHG_BUGCHECK(v);		old = atomic_read(v);		new = old + i;	} while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic_t)) != old);	return new;} static __inline__ intia64_atomic64_add (__s64 i, atomic64_t *v){	__s64 old, new;	CMPXCHG_BUGCHECK_DECL 	do {		CMPXCHG_BUGCHECK(v);		old = atomic_read(v);		new = old + i;	} while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic64_t)) != old);	return new;} static __inline__ intia64_atomic_sub (int i, atomic_t *v){	__s32 old, new;	CMPXCHG_BUGCHECK_DECL 	do {		CMPXCHG_BUGCHECK(v);		old = atomic_read(v);		new = old - i;	} while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic_t)) != old);	return new;} static __inline__ intia64_atomic64_sub (__s64 i, atomic64_t *v){	__s64 old, new;	CMPXCHG_BUGCHECK_DECL 	do {		CMPXCHG_BUGCHECK(v);		old = atomic_read(v);		new = old - i;	} while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic64_t)) != old);	return new;} #define atomic_cmpxchg(v, old, new) ((int)cmpxchg(&((v)->counter), old, new))#define atomic_xchg(v, new) (xchg(&((v)->counter), new)) #define atomic_add_unless(v, a, u)				\({								\	int c, old;						\	c = atomic_read(v);					\	for (;;) {						\		if (unlikely(c == (u)))				\			break;					\		old = atomic_cmpxchg((v), c, c + (a));		\		if (likely(old == c))				\			break;					\		c = old;					\	}							\	c != (u);						\})#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) #define atomic_add_return(i,v)						\({									\	int __ia64_aar_i = (i);						\	(__builtin_constant_p(i)					\	 && (   (__ia64_aar_i ==  1) || (__ia64_aar_i ==   4)		\	     || (__ia64_aar_i ==  8) || (__ia64_aar_i ==  16)		\	     || (__ia64_aar_i == -1) || (__ia64_aar_i ==  -4)		\	     || (__ia64_aar_i == -8) || (__ia64_aar_i == -16)))		\		? ia64_fetch_and_add(__ia64_aar_i, &(v)->counter)	\		: ia64_atomic_add(__ia64_aar_i, v);			\}) #define atomic64_add_return(i,v)					\({									\	long __ia64_aar_i = (i);					\	(__builtin_constant_p(i)					\	 && (   (__ia64_aar_i ==  1) || (__ia64_aar_i ==   4)		\	     || (__ia64_aar_i ==  8) || (__ia64_aar_i ==  16)		\	     || (__ia64_aar_i == -1) || (__ia64_aar_i ==  -4)		\	     || (__ia64_aar_i == -8) || (__ia64_aar_i == -16)))		\		? ia64_fetch_and_add(__ia64_aar_i, &(v)->counter)	\		: ia64_atomic64_add(__ia64_aar_i, v);			\}) /* * Atomically add I to V and return TRUE if the resulting value is * negative. */static __inline__ intatomic_add_negative (int i, atomic_t *v){	return atomic_add_return(i, v) < 0;} static __inline__ intatomic64_add_negative (__s64 i, atomic64_t *v){	return atomic64_add_return(i, v) < 0;} #define atomic_sub_return(i,v)						\({									\	int __ia64_asr_i = (i);						\	(__builtin_constant_p(i)					\	 && (   (__ia64_asr_i ==   1) || (__ia64_asr_i ==   4)		\	     || (__ia64_asr_i ==   8) || (__ia64_asr_i ==  16)		\	     || (__ia64_asr_i ==  -1) || (__ia64_asr_i ==  -4)		\	     || (__ia64_asr_i ==  -8) || (__ia64_asr_i == -16)))	\		? ia64_fetch_and_add(-__ia64_asr_i, &(v)->counter)	\		: ia64_atomic_sub(__ia64_asr_i, v);			\}) #define atomic64_sub_return(i,v)					\({									\	long __ia64_asr_i = (i);					\	(__builtin_constant_p(i)					\	 && (   (__ia64_asr_i ==   1) || (__ia64_asr_i ==   4)		\	     || (__ia64_asr_i ==   8) || (__ia64_asr_i ==  16)		\	     || (__ia64_asr_i ==  -1) || (__ia64_asr_i ==  -4)		\	     || (__ia64_asr_i ==  -8) || (__ia64_asr_i == -16)))	\		? ia64_fetch_and_add(-__ia64_asr_i, &(v)->counter)	\		: ia64_atomic64_sub(__ia64_asr_i, v);			\}) #define atomic_dec_return(v)		atomic_sub_return(1, (v))#define atomic_inc_return(v)		atomic_add_return(1, (v))#define atomic64_dec_return(v)		atomic64_sub_return(1, (v))#define atomic64_inc_return(v)		atomic64_add_return(1, (v)) #define atomic_sub_and_test(i,v)	(atomic_sub_return((i), (v)) == 0)#define atomic_dec_and_test(v)		(atomic_sub_return(1, (v)) == 0)#define atomic_inc_and_test(v)		(atomic_add_return(1, (v)) == 0)#define atomic64_sub_and_test(i,v)	(atomic64_sub_return((i), (v)) == 0)#define atomic64_dec_and_test(v)	(atomic64_sub_return(1, (v)) == 0)#define atomic64_inc_and_test(v)	(atomic64_add_return(1, (v)) == 0) #define atomic_add(i,v)			atomic_add_return((i), (v))#define atomic_sub(i,v)			atomic_sub_return((i), (v))#define atomic_inc(v)			atomic_add(1, (v))#define atomic_dec(v)			atomic_sub(1, (v)) #define atomic64_add(i,v)		atomic64_add_return((i), (v))#define atomic64_sub(i,v)		atomic64_sub_return((i), (v))#define atomic64_inc(v)			atomic64_add(1, (v))#define atomic64_dec(v)			atomic64_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() #include <asm-generic/atomic.h>#endif /* _ASM_IA64_ATOMIC_H */