| 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 | |
| Andrew Morton | 5998bf1 | 2006-01-08 01:00:29 -0800 | [diff] [blame] | 11 | #include <asm/types.h> |
| Christoph Lameter | d3cb487 | 2006-01-06 00:11:20 -0800 | [diff] [blame] | 12 | |
| 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 | |
| 23 | typedef atomic64_t atomic_long_t; |
| 24 | |
| 25 | #define ATOMIC_LONG_INIT(i) ATOMIC64_INIT(i) |
| 26 | |
| 27 | static 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 | |
| 34 | static inline void atomic_long_set(atomic_long_t *l, long i) |
| 35 | { |
| 36 | atomic64_t *v = (atomic64_t *)l; |
| 37 | |
| Kyle McMartin | 6b4977c | 2006-01-15 12:10:55 -0500 | [diff] [blame] | 38 | atomic64_set(v, i); |
| Christoph Lameter | d3cb487 | 2006-01-06 00:11:20 -0800 | [diff] [blame] | 39 | } |
| 40 | |
| 41 | static inline void atomic_long_inc(atomic_long_t *l) |
| 42 | { |
| 43 | atomic64_t *v = (atomic64_t *)l; |
| 44 | |
| 45 | atomic64_inc(v); |
| 46 | } |
| 47 | |
| 48 | static inline void atomic_long_dec(atomic_long_t *l) |
| 49 | { |
| 50 | atomic64_t *v = (atomic64_t *)l; |
| 51 | |
| 52 | atomic64_dec(v); |
| 53 | } |
| 54 | |
| 55 | static 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 | |
| 62 | static 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 | |
| 69 | #else |
| 70 | |
| 71 | typedef atomic_t atomic_long_t; |
| 72 | |
| 73 | #define ATOMIC_LONG_INIT(i) ATOMIC_INIT(i) |
| 74 | static inline long atomic_long_read(atomic_long_t *l) |
| 75 | { |
| 76 | atomic_t *v = (atomic_t *)l; |
| 77 | |
| 78 | return (long)atomic_read(v); |
| 79 | } |
| 80 | |
| 81 | static inline void atomic_long_set(atomic_long_t *l, long i) |
| 82 | { |
| 83 | atomic_t *v = (atomic_t *)l; |
| 84 | |
| 85 | atomic_set(v, i); |
| 86 | } |
| 87 | |
| 88 | static inline void atomic_long_inc(atomic_long_t *l) |
| 89 | { |
| 90 | atomic_t *v = (atomic_t *)l; |
| 91 | |
| 92 | atomic_inc(v); |
| 93 | } |
| 94 | |
| 95 | static inline void atomic_long_dec(atomic_long_t *l) |
| 96 | { |
| 97 | atomic_t *v = (atomic_t *)l; |
| 98 | |
| 99 | atomic_dec(v); |
| 100 | } |
| 101 | |
| 102 | static inline void atomic_long_add(long i, atomic_long_t *l) |
| 103 | { |
| 104 | atomic_t *v = (atomic_t *)l; |
| 105 | |
| 106 | atomic_add(i, v); |
| 107 | } |
| 108 | |
| 109 | static inline void atomic_long_sub(long i, atomic_long_t *l) |
| 110 | { |
| 111 | atomic_t *v = (atomic_t *)l; |
| 112 | |
| 113 | atomic_sub(i, v); |
| 114 | } |
| 115 | |
| 116 | #endif |
| 117 | #endif |