diff options
Diffstat (limited to 'include/atomic.h')
| -rw-r--r-- | include/atomic.h | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/include/atomic.h b/include/atomic.h index a1598e3850..bd2e2f13f7 100644 --- a/include/atomic.h +++ b/include/atomic.h @@ -273,9 +273,27 @@ __oldval & __mask; }) #endif -/* Atomically *mem &= mask and return the old value of *mem. */ +/* Atomically *mem &= mask. */ #ifndef atomic_and # define atomic_and(mem, mask) \ + do { \ + __typeof (*(mem)) __oldval; \ + __typeof (mem) __memp = (mem); \ + __typeof (*(mem)) __mask = (mask); \ + \ + do \ + __oldval = (*__memp); \ + while (__builtin_expect (atomic_compare_and_exchange_bool_acq (__memp, \ + __oldval \ + & __mask, \ + __oldval), \ + 0)); \ + } while (0) +#endif + +/* Atomically *mem &= mask and return the old value of *mem. */ +#ifndef atomic_and_val +# define atomic_and_val(mem, mask) \ ({ __typeof (*(mem)) __oldval; \ __typeof (mem) __memp = (mem); \ __typeof (*(mem)) __mask = (mask); \ @@ -294,6 +312,24 @@ /* Atomically *mem |= mask and return the old value of *mem. */ #ifndef atomic_or # define atomic_or(mem, mask) \ + do { \ + __typeof (*(mem)) __oldval; \ + __typeof (mem) __memp = (mem); \ + __typeof (*(mem)) __mask = (mask); \ + \ + do \ + __oldval = (*__memp); \ + while (__builtin_expect (atomic_compare_and_exchange_bool_acq (__memp, \ + __oldval \ + | __mask, \ + __oldval), \ + 0)); \ + } while (0) +#endif + +/* Atomically *mem |= mask and return the old value of *mem. */ +#ifndef atomic_or_val +# define atomic_or_val(mem, mask) \ ({ __typeof (*(mem)) __oldval; \ __typeof (mem) __memp = (mem); \ __typeof (*(mem)) __mask = (mask); \ |