About stdatomic:
In lib/stdatomic.c, I found that the atomic_load/atomic_store :
#define ATOMIC_LOAD(TYPE, MODE) \ TYPE __atomic_load_##MODE(const volatile
void *atom, int memorder) \ { \ return *(volatile TYPE *)atom; \ }
#define ATOMIC_STORE(TYPE, MODE) \ void __atomic_store_##MODE(volatile void
*atom, TYPE value, int memorder) \ { \ *(volatile TYPE *)atom =
value; \ }
I think it is better to ensure atomic_load get latest value, as follow:
#define ATOMIC_LOAD(TYPE, MODE) \ TYPE __atomic_load_##MODE(const volatile
void *atom, int memorder) \ { \
__atomic_thread_fence(__ATOMIC_ACQUIRE); \ return *(volatile TYPE
*)atom; \ }
#define ATOMIC_STORE(TYPE, MODE) \ void __atomic_store_##MODE(volatile void
*atom, TYPE value, int memorder) \ { \ *(volatile TYPE *)atom =
value; \ __atomic_thread_fence(__ATOMIC_RELEASE); \ }
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