1 #ifndef _ALPHA_CMPXCHG_H
2 #define _ALPHA_CMPXCHG_H
5 * Atomic exchange routines.
9 #define ____xchg(type, args...) __xchg ## type ## _local(args)
10 #define ____cmpxchg(type, args...) __cmpxchg ## type ## _local(args)
13 #define xchg_local(ptr, x) \
15 __typeof__(*(ptr)) _x_ = (x); \
16 (__typeof__(*(ptr))) __xchg_local((ptr), (unsigned long)_x_, \
20 #define cmpxchg_local(ptr, o, n) \
22 __typeof__(*(ptr)) _o_ = (o); \
23 __typeof__(*(ptr)) _n_ = (n); \
24 (__typeof__(*(ptr))) __cmpxchg_local((ptr), (unsigned long)_o_, \
29 #define cmpxchg64_local(ptr, o, n) \
31 BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
32 cmpxchg_local((ptr), (o), (n)); \
37 #define __ASM__MB "\tmb\n"
41 #define ____xchg(type, args...) __xchg ##type(args)
42 #define ____cmpxchg(type, args...) __cmpxchg ##type(args)
45 #define xchg(ptr, x) \
47 __typeof__(*(ptr)) _x_ = (x); \
48 (__typeof__(*(ptr))) __xchg((ptr), (unsigned long)_x_, \
52 #define cmpxchg(ptr, o, n) \
54 __typeof__(*(ptr)) _o_ = (o); \
55 __typeof__(*(ptr)) _n_ = (n); \
56 (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_, \
57 (unsigned long)_n_, sizeof(*(ptr)));\
60 #define cmpxchg64(ptr, o, n) \
62 BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
63 cmpxchg((ptr), (o), (n)); \
69 #endif /* _ALPHA_CMPXCHG_H */