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d3cb4871 CL |
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 | ||
11 | ||
12 | /* | |
13 | * Suppport for atomic_long_t | |
14 | * | |
15 | * Casts for parameters are avoided for existing atomic functions in order to | |
16 | * avoid issues with cast-as-lval under gcc 4.x and other limitations that the | |
17 | * macros of a platform may have. | |
18 | */ | |
19 | ||
20 | #if BITS_PER_LONG == 64 | |
21 | ||
22 | typedef atomic64_t atomic_long_t; | |
23 | ||
24 | #define ATOMIC_LONG_INIT(i) ATOMIC64_INIT(i) | |
25 | ||
26 | static inline long atomic_long_read(atomic_long_t *l) | |
27 | { | |
28 | atomic64_t *v = (atomic64_t *)l; | |
29 | ||
30 | return (long)atomic64_read(v); | |
31 | } | |
32 | ||
33 | static inline void atomic_long_set(atomic_long_t *l, long i) | |
34 | { | |
35 | atomic64_t *v = (atomic64_t *)l; | |
36 | ||
37 | atomic_set(v, i); | |
38 | } | |
39 | ||
40 | static inline void atomic_long_inc(atomic_long_t *l) | |
41 | { | |
42 | atomic64_t *v = (atomic64_t *)l; | |
43 | ||
44 | atomic64_inc(v); | |
45 | } | |
46 | ||
47 | static inline void atomic_long_dec(atomic_long_t *l) | |
48 | { | |
49 | atomic64_t *v = (atomic64_t *)l; | |
50 | ||
51 | atomic64_dec(v); | |
52 | } | |
53 | ||
54 | static inline void atomic_long_add(long i, atomic_long_t *l) | |
55 | { | |
56 | atomic64_t *v = (atomic64_t *)l; | |
57 | ||
58 | atomic64_add(i, v); | |
59 | } | |
60 | ||
61 | static inline void atomic_long_sub(long i, atomic_long_t *l) | |
62 | { | |
63 | atomic64_t *v = (atomic64_t *)l; | |
64 | ||
65 | atomic64_sub(i, v); | |
66 | } | |
67 | ||
68 | #else | |
69 | ||
70 | typedef atomic_t atomic_long_t; | |
71 | ||
72 | #define ATOMIC_LONG_INIT(i) ATOMIC_INIT(i) | |
73 | static inline long atomic_long_read(atomic_long_t *l) | |
74 | { | |
75 | atomic_t *v = (atomic_t *)l; | |
76 | ||
77 | return (long)atomic_read(v); | |
78 | } | |
79 | ||
80 | static inline void atomic_long_set(atomic_long_t *l, long i) | |
81 | { | |
82 | atomic_t *v = (atomic_t *)l; | |
83 | ||
84 | atomic_set(v, i); | |
85 | } | |
86 | ||
87 | static inline void atomic_long_inc(atomic_long_t *l) | |
88 | { | |
89 | atomic_t *v = (atomic_t *)l; | |
90 | ||
91 | atomic_inc(v); | |
92 | } | |
93 | ||
94 | static inline void atomic_long_dec(atomic_long_t *l) | |
95 | { | |
96 | atomic_t *v = (atomic_t *)l; | |
97 | ||
98 | atomic_dec(v); | |
99 | } | |
100 | ||
101 | static inline void atomic_long_add(long i, atomic_long_t *l) | |
102 | { | |
103 | atomic_t *v = (atomic_t *)l; | |
104 | ||
105 | atomic_add(i, v); | |
106 | } | |
107 | ||
108 | static inline void atomic_long_sub(long i, atomic_long_t *l) | |
109 | { | |
110 | atomic_t *v = (atomic_t *)l; | |
111 | ||
112 | atomic_sub(i, v); | |
113 | } | |
114 | ||
115 | #endif | |
116 | #endif |