#include <sys/spin_lock.h>

/// Relax the spinlock using AMD64 pause instruction
void spin_lock_relax(void) { __asm__ volatile("pause" ::: "memory"); }

void spin_lock_save_flags(uint64_t* flags) {
  __asm__ volatile("pushfq; cli; popq %0" : "=rm"(*flags)::"memory");
}

void spin_lock_restore_flags(uint64_t flags) {
  __asm__ volatile("pushq %0; popfq" ::"rm"(flags) : "memory", "cc");
}