| 34,6 → 34,13 |
|---|
| #define atomic_inc(x) (a_add(x,1)) |
| #define atomic_dec(x) (a_sub(x,1)) |
| |
| #define atomic_inc_pre(x) (a_add(x,1)-1) |
| #define atomic_dec_pre(x) (a_sub(x,1)+1) |
| |
| #define atomic_inc_post(x) (a_add(x,1)) |
| #define atomic_dec_post(x) (a_sub(x,1)) |
| |
| |
| typedef volatile __u32 atomic_t; |
| |
| /* |
| 44,6 → 51,9 |
|---|
| * (store), except that the LL (load-linked) instruction loads the address |
| * of the variable to a special register and if another process writes to |
| * the same location, the SC (store-conditional) instruction fails. |
| |
| Returns (*val)+i |
| |
| */ |
| static inline atomic_t a_add(atomic_t *val, int i) |
| { |
| 72,6 → 82,9 |
|---|
| * Atomic subtraction |
| * |
| * Implemented in the same manner as a_add, except we substract the value. |
| |
| Returns (*val)-i |
| |
| */ |
| static inline atomic_t a_sub(atomic_t *val, int i) |
| |