aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-generic/atomic.h
blob: 0fada8f16dc6d8f6ca0a1f2907684edefdcf76c6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
#ifndef _ASM_GENERIC_ATOMIC_H
#define _ASM_GENERIC_ATOMIC_H
/*
 * Copyright (C) 2005 Silicon Graphics, Inc.
 *	Christoph Lameter <clameter@sgi.com>
 *
 * Allows to provide arch independent atomic definitions without the need to
 * edit all arch specific atomic.h files.
 */

#include <asm/types.h>

/*
 * Suppport for atomic_long_t
 *
 * Casts for parameters are avoided for existing atomic functions in order to
 * avoid issues with cast-as-lval under gcc 4.x and other limitations that the
 * macros of a platform may have.
 */

#if BITS_PER_LONG == 64

typedef atomic64_t atomic_long_t;

#define ATOMIC_LONG_INIT(i)	ATOMIC64_INIT(i)

static inline long atomic_long_read(atomic_long_t *l)
{
	atomic64_t *v = (atomic64_t *)l;

	return (long)atomic64_read(v);
}

static inline void atomic_long_set(atomic_long_t *l, long i)
{
	atomic64_t *v = (atomic64_t *)l;

	atomic_set(v, i);
}

static inline void atomic_long_inc(atomic_long_t *l)
{
	atomic64_t *v = (atomic64_t *)l;

	atomic64_inc(v);
}

static inline void atomic_long_dec(atomic_long_t *l)
{
	atomic64_t *v = (atomic64_t *)l;

	atomic64_dec(v);
}

static inline void atomic_long_add(long i, atomic_long_t *l)
{
	atomic64_t *v = (atomic64_t *)l;

	atomic64_add(i, v);
}

static inline void atomic_long_sub(long i, atomic_long_t *l)
{
	atomic64_t *v = (atomic64_t *)l;

	atomic64_sub(i, v);
}

#else

typedef atomic_t atomic_long_t;

#define ATOMIC_LONG_INIT(i)	ATOMIC_INIT(i)
static inline long atomic_long_read(atomic_long_t *l)
{
	atomic_t *v = (atomic_t *)l;

	return (long)atomic_read(v);
}

static inline void atomic_long_set(atomic_long_t *l, long i)
{
	atomic_t *v = (atomic_t *)l;

	atomic_set(v, i);
}

static inline void atomic_long_inc(atomic_long_t *l)
{
	atomic_t *v = (atomic_t *)l;

	atomic_inc(v);
}

static inline void atomic_long_dec(atomic_long_t *l)
{
	atomic_t *v = (atomic_t *)l;

	atomic_dec(v);
}

static inline void atomic_long_add(long i, atomic_long_t *l)
{
	atomic_t *v = (atomic_t *)l;

	atomic_add(i, v);
}

static inline void atomic_long_sub(long i, atomic_long_t *l)
{
	atomic_t *v = (atomic_t *)l;

	atomic_sub(i, v);
}

#endif
#endif