On 26/03/20 20:58, Richard Henderson wrote: >> + >> +#ifndef atomic_fetch_add >> #define atomic_fetch_add(ptr, n) __atomic_fetch_add(ptr, n, >> __ATOMIC_SEQ_CST) >> #define atomic_fetch_sub(ptr, n) __atomic_fetch_sub(ptr, n, >> __ATOMIC_SEQ_CST) >> #define atomic_fetch_and(ptr, n) __atomic_fetch_and(ptr, n, >> __ATOMIC_SEQ_CST) >> #define atomic_fetch_or(ptr, n) __atomic_fetch_or(ptr, n, __ATOMIC_SEQ_CST) >> #define atomic_fetch_xor(ptr, n) __atomic_fetch_xor(ptr, n, >> __ATOMIC_SEQ_CST) >> +#endif > Do we really get sequential consistency from <stdatomic.h>?
Yes, it's the default value (to pass a memory order you need atomic_fetch_*_explicit). Paolo > Should we not in fact #undef as a workaround instead?
