1 #ifndef _ASM_GENERIC_ATOMIC_LONG_H
2 #define _ASM_GENERIC_ATOMIC_LONG_H
4 * Copyright (C) 2005 Silicon Graphics, Inc.
7 * Allows to provide arch independent atomic definitions without the need to
8 * edit all arch specific atomic.h files.
11 #include <asm/types.h>
14 * Suppport for atomic_long_t
16 * Casts for parameters are avoided for existing atomic functions in order to
17 * avoid issues with cast-as-lval under gcc 4.x and other limitations that the
18 * macros of a platform may have.
21 #if BITS_PER_LONG == 64
23 typedef atomic64_t atomic_long_t
;
25 #define ATOMIC_LONG_INIT(i) ATOMIC64_INIT(i)
26 #define ATOMIC_LONG_PFX(x) atomic64 ## x
30 typedef atomic_t atomic_long_t
;
32 #define ATOMIC_LONG_INIT(i) ATOMIC_INIT(i)
33 #define ATOMIC_LONG_PFX(x) atomic ## x
37 #define ATOMIC_LONG_READ_OP(mo) \
38 static inline long atomic_long_read##mo(const atomic_long_t *l) \
40 ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; \
42 return (long)ATOMIC_LONG_PFX(_read##mo)(v); \
45 ATOMIC_LONG_READ_OP(_acquire
)
47 #undef ATOMIC_LONG_READ_OP
49 #define ATOMIC_LONG_SET_OP(mo) \
50 static inline void atomic_long_set##mo(atomic_long_t *l, long i) \
52 ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; \
54 ATOMIC_LONG_PFX(_set##mo)(v, i); \
57 ATOMIC_LONG_SET_OP(_release
)
59 #undef ATOMIC_LONG_SET_OP
61 #define ATOMIC_LONG_ADD_SUB_OP(op, mo) \
63 atomic_long_##op##_return##mo(long i, atomic_long_t *l) \
65 ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; \
67 return (long)ATOMIC_LONG_PFX(_##op##_return##mo)(i, v); \
69 ATOMIC_LONG_ADD_SUB_OP(add
,)
70 ATOMIC_LONG_ADD_SUB_OP(add
, _relaxed
)
71 ATOMIC_LONG_ADD_SUB_OP(add
, _acquire
)
72 ATOMIC_LONG_ADD_SUB_OP(add
, _release
)
73 ATOMIC_LONG_ADD_SUB_OP(sub
,)
74 ATOMIC_LONG_ADD_SUB_OP(sub
, _relaxed
)
75 ATOMIC_LONG_ADD_SUB_OP(sub
, _acquire
)
76 ATOMIC_LONG_ADD_SUB_OP(sub
, _release
)
78 #undef ATOMIC_LONG_ADD_SUB_OP
80 #define atomic_long_cmpxchg_relaxed(l, old, new) \
81 (ATOMIC_LONG_PFX(_cmpxchg_relaxed)((ATOMIC_LONG_PFX(_t) *)(l), \
83 #define atomic_long_cmpxchg_acquire(l, old, new) \
84 (ATOMIC_LONG_PFX(_cmpxchg_acquire)((ATOMIC_LONG_PFX(_t) *)(l), \
86 #define atomic_long_cmpxchg_release(l, old, new) \
87 (ATOMIC_LONG_PFX(_cmpxchg_release)((ATOMIC_LONG_PFX(_t) *)(l), \
89 #define atomic_long_cmpxchg(l, old, new) \
90 (ATOMIC_LONG_PFX(_cmpxchg)((ATOMIC_LONG_PFX(_t) *)(l), (old), (new)))
92 #define atomic_long_xchg_relaxed(v, new) \
93 (ATOMIC_LONG_PFX(_xchg_relaxed)((ATOMIC_LONG_PFX(_t) *)(v), (new)))
94 #define atomic_long_xchg_acquire(v, new) \
95 (ATOMIC_LONG_PFX(_xchg_acquire)((ATOMIC_LONG_PFX(_t) *)(v), (new)))
96 #define atomic_long_xchg_release(v, new) \
97 (ATOMIC_LONG_PFX(_xchg_release)((ATOMIC_LONG_PFX(_t) *)(v), (new)))
98 #define atomic_long_xchg(v, new) \
99 (ATOMIC_LONG_PFX(_xchg)((ATOMIC_LONG_PFX(_t) *)(v), (new)))
101 static __always_inline
void atomic_long_inc(atomic_long_t
*l
)
103 ATOMIC_LONG_PFX(_t
) *v
= (ATOMIC_LONG_PFX(_t
) *)l
;
105 ATOMIC_LONG_PFX(_inc
)(v
);
108 static __always_inline
void atomic_long_dec(atomic_long_t
*l
)
110 ATOMIC_LONG_PFX(_t
) *v
= (ATOMIC_LONG_PFX(_t
) *)l
;
112 ATOMIC_LONG_PFX(_dec
)(v
);
115 #define ATOMIC_LONG_OP(op) \
116 static __always_inline void \
117 atomic_long_##op(long i, atomic_long_t *l) \
119 ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; \
121 ATOMIC_LONG_PFX(_##op)(i, v); \
129 ATOMIC_LONG_OP(andnot
)
131 #undef ATOMIC_LONG_OP
133 static inline int atomic_long_sub_and_test(long i
, atomic_long_t
*l
)
135 ATOMIC_LONG_PFX(_t
) *v
= (ATOMIC_LONG_PFX(_t
) *)l
;
137 return ATOMIC_LONG_PFX(_sub_and_test
)(i
, v
);
140 static inline int atomic_long_dec_and_test(atomic_long_t
*l
)
142 ATOMIC_LONG_PFX(_t
) *v
= (ATOMIC_LONG_PFX(_t
) *)l
;
144 return ATOMIC_LONG_PFX(_dec_and_test
)(v
);
147 static inline int atomic_long_inc_and_test(atomic_long_t
*l
)
149 ATOMIC_LONG_PFX(_t
) *v
= (ATOMIC_LONG_PFX(_t
) *)l
;
151 return ATOMIC_LONG_PFX(_inc_and_test
)(v
);
154 static inline int atomic_long_add_negative(long i
, atomic_long_t
*l
)
156 ATOMIC_LONG_PFX(_t
) *v
= (ATOMIC_LONG_PFX(_t
) *)l
;
158 return ATOMIC_LONG_PFX(_add_negative
)(i
, v
);
161 #define ATOMIC_LONG_INC_DEC_OP(op, mo) \
163 atomic_long_##op##_return##mo(atomic_long_t *l) \
165 ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; \
167 return (long)ATOMIC_LONG_PFX(_##op##_return##mo)(v); \
169 ATOMIC_LONG_INC_DEC_OP(inc
,)
170 ATOMIC_LONG_INC_DEC_OP(inc
, _relaxed
)
171 ATOMIC_LONG_INC_DEC_OP(inc
, _acquire
)
172 ATOMIC_LONG_INC_DEC_OP(inc
, _release
)
173 ATOMIC_LONG_INC_DEC_OP(dec
,)
174 ATOMIC_LONG_INC_DEC_OP(dec
, _relaxed
)
175 ATOMIC_LONG_INC_DEC_OP(dec
, _acquire
)
176 ATOMIC_LONG_INC_DEC_OP(dec
, _release
)
178 #undef ATOMIC_LONG_INC_DEC_OP
180 static inline long atomic_long_add_unless(atomic_long_t
*l
, long a
, long u
)
182 ATOMIC_LONG_PFX(_t
) *v
= (ATOMIC_LONG_PFX(_t
) *)l
;
184 return (long)ATOMIC_LONG_PFX(_add_unless
)(v
, a
, u
);
187 #define atomic_long_inc_not_zero(l) \
188 ATOMIC_LONG_PFX(_inc_not_zero)((ATOMIC_LONG_PFX(_t) *)(l))
190 #endif /* _ASM_GENERIC_ATOMIC_LONG_H */
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