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 #include <asm/types.h> 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 38 atomic64_set(v, i); 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 118