| #pragma once |
| |
| #include <stdatomic.h> |
| |
| // TODO(kulakowski) This is a temporary shim to separate the |
| // bespoke=>C11 atomic conversion from the rewrite of the two |
| // different CAS styles (return bool and pointer out vs. return old |
| // value). |
| static inline int a_cas_shim(_Atomic(int)* p, int t, int s) { |
| atomic_compare_exchange_strong(p, &t, s); |
| return t; |
| } |
| |
| #if defined(__x86_64__) |
| static inline void a_spin(void) { |
| __asm__ __volatile__("pause" |
| : |
| : |
| : "memory"); |
| } |
| #else |
| #define a_spin() atomic_thread_fence(memory_order_seq_cst) |
| #endif |
