1#pragma once 2 3#include <stdatomic.h> 4 5// TODO(kulakowski) This is a temporary shim to separate the 6// bespoke=>C11 atomic conversion from the rewrite of the two 7// different CAS styles (return bool and pointer out vs. return old 8// value). 9static inline int a_cas_shim(_Atomic(int)* p, int t, int s) { 10 atomic_compare_exchange_strong(p, &t, s); 11 return t; 12} 13 14#if defined(__x86_64__) 15static inline void a_spin(void) { 16 __asm__ __volatile__("pause" 17 : 18 : 19 : "memory"); 20} 21#else 22#define a_spin() atomic_thread_fence(memory_order_seq_cst) 23#endif 24