| 1 | #ifndef _ASM_GENERIC_ATOMIC_H
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| 2 | #define _ASM_GENERIC_ATOMIC_H
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| 3 | |
| 4 | * Copyright (C) 2005 Silicon Graphics, Inc.
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| 5 | * Christoph Lameter <[email protected]>
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| 6 | *
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| 7 | * Allows to provide arch independent atomic definitions without the need to
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| 8 | * edit all arch specific atomic.h files.
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| 9 |
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| 10 |
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| 11 | #include <asm/types.h>
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| 12 |
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| 13 | |
| 14 | * Suppport for atomic_long_t
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| 15 | *
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| 16 | * Casts for parameters are avoided for existing atomic functions in order to
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| 17 | * avoid issues with cast-as-lval under gcc 4.x and other limitations that the
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| 18 | * macros of a platform may have.
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| 19 |
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| 20 |
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| 21 | #if BITS_PER_LONG == 64
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| 22 |
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| 23 | typedef atomic64_t atomic_long_t;
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| 24 |
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| 25 | #define ATOMIC_LONG_INIT(i) ATOMIC64_INIT(i)
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| 26 |
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| 27 | static inline long atomic_long_read(atomic_long_t *l)
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| 28 | {
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| 29 | atomic64_t *v = (atomic64_t *)l;
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| 30 |
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| 31 | return (long)atomic64_read(v);
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| 32 | }
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| 33 |
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| 34 | static inline void atomic_long_set(atomic_long_t *l, long i)
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| 35 | {
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| 36 | atomic64_t *v = (atomic64_t *)l;
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| 37 |
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| 38 | atomic64_set(v, i);
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| 39 | }
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| 40 |
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| 41 | static inline void atomic_long_inc(atomic_long_t *l)
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| 42 | {
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| 43 | atomic64_t *v = (atomic64_t *)l;
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| 44 |
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| 45 | atomic64_inc(v);
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| 46 | }
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| 47 |
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| 48 | static inline void atomic_long_dec(atomic_long_t *l)
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| 49 | {
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| 50 | atomic64_t *v = (atomic64_t *)l;
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| 51 |
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| 52 | atomic64_dec(v);
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| 53 | }
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| 54 |
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| 55 | static inline void atomic_long_add(long i, atomic_long_t *l)
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| 56 | {
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| 57 | atomic64_t *v = (atomic64_t *)l;
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| 58 |
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| 59 | atomic64_add(i, v);
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| 60 | }
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| 61 |
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| 62 | static inline void atomic_long_sub(long i, atomic_long_t *l)
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| 63 | {
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| 64 | atomic64_t *v = (atomic64_t *)l;
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| 65 |
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| 66 | atomic64_sub(i, v);
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| 67 | }
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| 68 |
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| 69 | #else
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| 70 |
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| 71 | typedef atomic_t atomic_long_t;
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| 72 |
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| 73 | #define ATOMIC_LONG_INIT(i) ATOMIC_INIT(i)
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| 74 | static inline long atomic_long_read(atomic_long_t *l)
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| 75 | {
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| 76 | atomic_t *v = (atomic_t *)l;
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| 77 |
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| 78 | return (long)atomic_read(v);
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| 79 | }
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| 80 |
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| 81 | static inline void atomic_long_set(atomic_long_t *l, long i)
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| 82 | {
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| 83 | atomic_t *v = (atomic_t *)l;
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| 84 |
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| 85 | atomic_set(v, i);
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| 86 | }
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| 87 |
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| 88 | static inline void atomic_long_inc(atomic_long_t *l)
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| 89 | {
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| 90 | atomic_t *v = (atomic_t *)l;
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| 91 |
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| 92 | atomic_inc(v);
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| 93 | }
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| 94 |
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| 95 | static inline void atomic_long_dec(atomic_long_t *l)
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| 96 | {
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| 97 | atomic_t *v = (atomic_t *)l;
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| 98 |
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| 99 | atomic_dec(v);
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| 100 | }
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| 101 |
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| 102 | static inline void atomic_long_add(long i, atomic_long_t *l)
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| 103 | {
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| 104 | atomic_t *v = (atomic_t *)l;
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| 105 |
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| 106 | atomic_add(i, v);
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| 107 | }
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| 108 |
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| 109 | static inline void atomic_long_sub(long i, atomic_long_t *l)
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| 110 | {
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| 111 | atomic_t *v = (atomic_t *)l;
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| 112 |
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| 113 | atomic_sub(i, v);
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| 114 | }
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| 115 |
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| 116 | #endif
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| 117 |
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| 118 | #endif
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