1 #ifndef _ASM_GENERIC_ATOMIC_H
2 #define _ASM_GENERIC_ATOMIC_H
4 * Copyright (C) 2005 Silicon Graphics, Inc.
5 * Christoph Lameter <clameter@sgi.com>
7 * Allows to provide arch independent atomic definitions without the need to
8 * edit all arch specific atomic.h files.
13 * Suppport for atomic_long_t
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.
20 #if BITS_PER_LONG == 64
22 typedef atomic64_t atomic_long_t;
24 #define ATOMIC_LONG_INIT(i) ATOMIC64_INIT(i)
26 static inline long atomic_long_read(atomic_long_t *l)
28 atomic64_t *v = (atomic64_t *)l;
30 return (long)atomic64_read(v);
33 static inline void atomic_long_set(atomic_long_t *l, long i)
35 atomic64_t *v = (atomic64_t *)l;
40 static inline void atomic_long_inc(atomic_long_t *l)
42 atomic64_t *v = (atomic64_t *)l;
47 static inline void atomic_long_dec(atomic_long_t *l)
49 atomic64_t *v = (atomic64_t *)l;
54 static inline void atomic_long_add(long i, atomic_long_t *l)
56 atomic64_t *v = (atomic64_t *)l;
61 static inline void atomic_long_sub(long i, atomic_long_t *l)
63 atomic64_t *v = (atomic64_t *)l;
70 typedef atomic_t atomic_long_t;
72 #define ATOMIC_LONG_INIT(i) ATOMIC_INIT(i)
73 static inline long atomic_long_read(atomic_long_t *l)
75 atomic_t *v = (atomic_t *)l;
77 return (long)atomic_read(v);
80 static inline void atomic_long_set(atomic_long_t *l, long i)
82 atomic_t *v = (atomic_t *)l;
87 static inline void atomic_long_inc(atomic_long_t *l)
89 atomic_t *v = (atomic_t *)l;
94 static inline void atomic_long_dec(atomic_long_t *l)
96 atomic_t *v = (atomic_t *)l;
101 static inline void atomic_long_add(long i, atomic_long_t *l)
103 atomic_t *v = (atomic_t *)l;
108 static inline void atomic_long_sub(long i, atomic_long_t *l)
110 atomic_t *v = (atomic_t *)l;