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| 27 | */ |
27 | */ |
| 28 | 28 | ||
| 29 | #ifndef __ia64_ATOMIC_H__ |
29 | #ifndef __ia64_ATOMIC_H__ |
| 30 | #define __ia64_ATOMIC_H__ |
30 | #define __ia64_ATOMIC_H__ |
| 31 | 31 | ||
| 32 | /* |
- | |
| 33 | * TODO: these are just placeholders for real implementations of atomic_inc and atomic_dec. |
- | |
| 34 | * WARNING: the following functions cause the code to be preemption-unsafe !!! |
32 | #include <arch/types.h> |
| 35 | */ |
- | |
| 36 | 33 | ||
| - | 34 | typedef volatile __u64 atomic_t; |
|
| - | 35 | ||
| 37 | static inline atomic_inc(volatile int *val) { |
36 | static inline atomic_t atomic_add(atomic_t *val, int imm) |
| 38 | *val++; |
- | |
| 39 | } |
37 | { |
| - | 38 | atomic_t v; |
|
| 40 | 39 | ||
| - | 40 | /* |
|
| 41 | static inline atomic_dec(volatile int *val) { |
41 | * __asm__ volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v), "=m" (val) : "i" (imm)); |
| - | 42 | */ |
|
| 42 | *val--; |
43 | *val += imm; |
| - | 44 | ||
| - | 45 | return v; |
|
| 43 | } |
46 | } |
| 44 | 47 | ||
| - | 48 | static inline atomic_t atomic_inc(atomic_t *val) { return atomic_add(val, 1); } |
|
| - | 49 | static inline atomic_t atomic_dec(atomic_t *val) { return atomic_add(val, -1); } |
|
| - | 50 | ||
| 45 | #endif |
51 | #endif |