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1 | #ifndef _ASM_GENERIC_ATOMIC_H |
2 | #define _ASM_GENERIC_ATOMIC_H | |
3 | /* | |
4 | * Copyright (C) 2005 Silicon Graphics, Inc. | |
5 | * Christoph Lameter <clameter@sgi.com> | |
6 | * | |
7 | * Allows to provide arch independent atomic definitions without the need to | |
8 | * edit all arch specific atomic.h files. | |
9 | */ | |
10 | ||
5998bf1d | 11 | #include <asm/types.h> |
d3cb4871 CL |
12 | |
13 | /* | |
14 | * Suppport for atomic_long_t | |
15 | * | |
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. | |
19 | */ | |
20 | ||
21 | #if BITS_PER_LONG == 64 | |
22 | ||
23 | typedef atomic64_t atomic_long_t; | |
24 | ||
25 | #define ATOMIC_LONG_INIT(i) ATOMIC64_INIT(i) | |
26 | ||
27 | static inline long atomic_long_read(atomic_long_t *l) | |
28 | { | |
29 | atomic64_t *v = (atomic64_t *)l; | |
30 | ||
31 | return (long)atomic64_read(v); | |
32 | } | |
33 | ||
34 | static inline void atomic_long_set(atomic_long_t *l, long i) | |
35 | { | |
36 | atomic64_t *v = (atomic64_t *)l; | |
37 | ||
6b4977ce | 38 | atomic64_set(v, i); |
d3cb4871 CL |
39 | } |
40 | ||
41 | static inline void atomic_long_inc(atomic_long_t *l) | |
42 | { | |
43 | atomic64_t *v = (atomic64_t *)l; | |
44 | ||
45 | atomic64_inc(v); | |
46 | } | |
47 | ||
48 | static inline void atomic_long_dec(atomic_long_t *l) | |
49 | { | |
50 | atomic64_t *v = (atomic64_t *)l; | |
51 | ||
52 | atomic64_dec(v); | |
53 | } | |
54 | ||
55 | static inline void atomic_long_add(long i, atomic_long_t *l) | |
56 | { | |
57 | atomic64_t *v = (atomic64_t *)l; | |
58 | ||
59 | atomic64_add(i, v); | |
60 | } | |
61 | ||
62 | static inline void atomic_long_sub(long i, atomic_long_t *l) | |
63 | { | |
64 | atomic64_t *v = (atomic64_t *)l; | |
65 | ||
66 | atomic64_sub(i, v); | |
67 | } | |
68 | ||
69 | #else | |
70 | ||
71 | typedef atomic_t atomic_long_t; | |
72 | ||
73 | #define ATOMIC_LONG_INIT(i) ATOMIC_INIT(i) | |
74 | static inline long atomic_long_read(atomic_long_t *l) | |
75 | { | |
76 | atomic_t *v = (atomic_t *)l; | |
77 | ||
78 | return (long)atomic_read(v); | |
79 | } | |
80 | ||
81 | static inline void atomic_long_set(atomic_long_t *l, long i) | |
82 | { | |
83 | atomic_t *v = (atomic_t *)l; | |
84 | ||
85 | atomic_set(v, i); | |
86 | } | |
87 | ||
88 | static inline void atomic_long_inc(atomic_long_t *l) | |
89 | { | |
90 | atomic_t *v = (atomic_t *)l; | |
91 | ||
92 | atomic_inc(v); | |
93 | } | |
94 | ||
95 | static inline void atomic_long_dec(atomic_long_t *l) | |
96 | { | |
97 | atomic_t *v = (atomic_t *)l; | |
98 | ||
99 | atomic_dec(v); | |
100 | } | |
101 | ||
102 | static inline void atomic_long_add(long i, atomic_long_t *l) | |
103 | { | |
104 | atomic_t *v = (atomic_t *)l; | |
105 | ||
106 | atomic_add(i, v); | |
107 | } | |
108 | ||
109 | static inline void atomic_long_sub(long i, atomic_long_t *l) | |
110 | { | |
111 | atomic_t *v = (atomic_t *)l; | |
112 | ||
113 | atomic_sub(i, v); | |
114 | } | |
115 | ||
116 | #endif | |
117 | #endif |