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Christoph Lameterd3cb4872006-01-06 00:11:20 -08001#ifndef _ASM_GENERIC_ATOMIC_H
2#define _ASM_GENERIC_ATOMIC_H
3/*
4 * Copyright (C) 2005 Silicon Graphics, Inc.
Christoph Lametercde53532008-07-04 09:59:22 -07005 * Christoph Lameter
Christoph Lameterd3cb4872006-01-06 00:11:20 -08006 *
7 * Allows to provide arch independent atomic definitions without the need to
8 * edit all arch specific atomic.h files.
9 */
10
Andrew Morton5998bf12006-01-08 01:00:29 -080011#include <asm/types.h>
Christoph Lameterd3cb4872006-01-06 00:11:20 -080012
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
23typedef atomic64_t atomic_long_t;
24
25#define ATOMIC_LONG_INIT(i) ATOMIC64_INIT(i)
26
27static 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
34static inline void atomic_long_set(atomic_long_t *l, long i)
35{
36 atomic64_t *v = (atomic64_t *)l;
37
Kyle McMartin6b4977c2006-01-15 12:10:55 -050038 atomic64_set(v, i);
Christoph Lameterd3cb4872006-01-06 00:11:20 -080039}
40
41static inline void atomic_long_inc(atomic_long_t *l)
42{
43 atomic64_t *v = (atomic64_t *)l;
44
45 atomic64_inc(v);
46}
47
48static inline void atomic_long_dec(atomic_long_t *l)
49{
50 atomic64_t *v = (atomic64_t *)l;
51
52 atomic64_dec(v);
53}
54
55static 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
62static 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
Mathieu Desnoyersbb2382c2007-05-08 00:34:19 -070069static inline int atomic_long_sub_and_test(long i, atomic_long_t *l)
70{
71 atomic64_t *v = (atomic64_t *)l;
72
73 return atomic64_sub_and_test(i, v);
74}
75
76static inline int atomic_long_dec_and_test(atomic_long_t *l)
77{
78 atomic64_t *v = (atomic64_t *)l;
79
80 return atomic64_dec_and_test(v);
81}
82
83static inline int atomic_long_inc_and_test(atomic_long_t *l)
84{
85 atomic64_t *v = (atomic64_t *)l;
86
87 return atomic64_inc_and_test(v);
88}
89
90static inline int atomic_long_add_negative(long i, atomic_long_t *l)
91{
92 atomic64_t *v = (atomic64_t *)l;
93
94 return atomic64_add_negative(i, v);
95}
96
97static inline long atomic_long_add_return(long i, atomic_long_t *l)
98{
99 atomic64_t *v = (atomic64_t *)l;
100
101 return (long)atomic64_add_return(i, v);
102}
103
104static inline long atomic_long_sub_return(long i, atomic_long_t *l)
105{
106 atomic64_t *v = (atomic64_t *)l;
107
108 return (long)atomic64_sub_return(i, v);
109}
110
111static inline long atomic_long_inc_return(atomic_long_t *l)
112{
113 atomic64_t *v = (atomic64_t *)l;
114
115 return (long)atomic64_inc_return(v);
116}
117
118static inline long atomic_long_dec_return(atomic_long_t *l)
119{
120 atomic64_t *v = (atomic64_t *)l;
121
122 return (long)atomic64_dec_return(v);
123}
124
Mathieu Desnoyers2856f5e2007-05-08 00:34:38 -0700125static inline long atomic_long_add_unless(atomic_long_t *l, long a, long u)
126{
127 atomic64_t *v = (atomic64_t *)l;
128
129 return (long)atomic64_add_unless(v, a, u);
130}
Mathieu Desnoyersbb2382c2007-05-08 00:34:19 -0700131
132#define atomic_long_inc_not_zero(l) atomic64_inc_not_zero((atomic64_t *)(l))
133
134#define atomic_long_cmpxchg(l, old, new) \
135 (atomic_cmpxchg((atomic64_t *)(l), (old), (new)))
136#define atomic_long_xchg(v, new) \
137 (atomic_xchg((atomic64_t *)(l), (new)))
138
Adrian Bunk4b358e22006-12-06 20:40:28 -0800139#else /* BITS_PER_LONG == 64 */
Christoph Lameterd3cb4872006-01-06 00:11:20 -0800140
141typedef atomic_t atomic_long_t;
142
143#define ATOMIC_LONG_INIT(i) ATOMIC_INIT(i)
144static inline long atomic_long_read(atomic_long_t *l)
145{
146 atomic_t *v = (atomic_t *)l;
147
148 return (long)atomic_read(v);
149}
150
151static inline void atomic_long_set(atomic_long_t *l, long i)
152{
153 atomic_t *v = (atomic_t *)l;
154
155 atomic_set(v, i);
156}
157
158static inline void atomic_long_inc(atomic_long_t *l)
159{
160 atomic_t *v = (atomic_t *)l;
161
162 atomic_inc(v);
163}
164
165static inline void atomic_long_dec(atomic_long_t *l)
166{
167 atomic_t *v = (atomic_t *)l;
168
169 atomic_dec(v);
170}
171
172static inline void atomic_long_add(long i, atomic_long_t *l)
173{
174 atomic_t *v = (atomic_t *)l;
175
176 atomic_add(i, v);
177}
178
179static inline void atomic_long_sub(long i, atomic_long_t *l)
180{
181 atomic_t *v = (atomic_t *)l;
182
183 atomic_sub(i, v);
184}
185
Mathieu Desnoyersbb2382c2007-05-08 00:34:19 -0700186static inline int atomic_long_sub_and_test(long i, atomic_long_t *l)
187{
188 atomic_t *v = (atomic_t *)l;
189
190 return atomic_sub_and_test(i, v);
191}
192
193static inline int atomic_long_dec_and_test(atomic_long_t *l)
194{
195 atomic_t *v = (atomic_t *)l;
196
197 return atomic_dec_and_test(v);
198}
199
200static inline int atomic_long_inc_and_test(atomic_long_t *l)
201{
202 atomic_t *v = (atomic_t *)l;
203
204 return atomic_inc_and_test(v);
205}
206
207static inline int atomic_long_add_negative(long i, atomic_long_t *l)
208{
209 atomic_t *v = (atomic_t *)l;
210
211 return atomic_add_negative(i, v);
212}
213
214static inline long atomic_long_add_return(long i, atomic_long_t *l)
215{
216 atomic_t *v = (atomic_t *)l;
217
218 return (long)atomic_add_return(i, v);
219}
220
221static inline long atomic_long_sub_return(long i, atomic_long_t *l)
222{
223 atomic_t *v = (atomic_t *)l;
224
225 return (long)atomic_sub_return(i, v);
226}
227
228static inline long atomic_long_inc_return(atomic_long_t *l)
229{
230 atomic_t *v = (atomic_t *)l;
231
232 return (long)atomic_inc_return(v);
233}
234
235static inline long atomic_long_dec_return(atomic_long_t *l)
236{
237 atomic_t *v = (atomic_t *)l;
238
239 return (long)atomic_dec_return(v);
240}
241
Mathieu Desnoyers2856f5e2007-05-08 00:34:38 -0700242static inline long atomic_long_add_unless(atomic_long_t *l, long a, long u)
243{
244 atomic_t *v = (atomic_t *)l;
245
246 return (long)atomic_add_unless(v, a, u);
247}
Mathieu Desnoyersbb2382c2007-05-08 00:34:19 -0700248
249#define atomic_long_inc_not_zero(l) atomic_inc_not_zero((atomic_t *)(l))
250
251#define atomic_long_cmpxchg(l, old, new) \
252 (atomic_cmpxchg((atomic_t *)(l), (old), (new)))
253#define atomic_long_xchg(v, new) \
254 (atomic_xchg((atomic_t *)(l), (new)))
255
Adrian Bunk4b358e22006-12-06 20:40:28 -0800256#endif /* BITS_PER_LONG == 64 */
257
258#endif /* _ASM_GENERIC_ATOMIC_H */