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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
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