| Christoph Lameter | d3cb487 | 2006-01-06 00:11:20 -0800 | [diff] [blame^] | 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 |