diff options
Diffstat (limited to 'sysdeps/generic/bits/atomic.h')
| -rw-r--r-- | sysdeps/generic/bits/atomic.h | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/sysdeps/generic/bits/atomic.h b/sysdeps/generic/bits/atomic.h index 7595b407ca..6245130a91 100644 --- a/sysdeps/generic/bits/atomic.h +++ b/sysdeps/generic/bits/atomic.h @@ -25,7 +25,19 @@ up with real definitions. */ /* The only basic operation needed is compare and exchange. */ -#define arch_compare_and_exchange_acq(mem, newval, oldval) \ - ({ *(mem) == (oldval) ? 1 : (*(mem) = (newval), 0); }) +#define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \ + ({ __typeof (mem) __gmemp = (mem); \ + __typeof (*mem) __gret = *__gmemp; \ + __typeof (*mem) __gnewval = (newval); \ + \ + if (__gret == (oldval)) \ + *__gmemp = __gnewval; \ + __gret; }) + +#define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \ + ({ __typeof (mem) __gmemp = (mem); \ + __typeof (*mem) __gnewval = (newval); \ + \ + *__gmemp == (oldval) ? (*__gmemp = __gnewval, 0) : 1; }) #endif /* bits/atomic.h */ |