Spin Function

The database does not invoke Pthread_spinlock to monitor spin mutex locks, detect deadlocks, and control spin time. Instead, the database uses the customized mode. The spin operation implementation varies according to the platform.

• x86 platform

  static __inline__ void pg_spin_delay_impl(void)
  {
          __asm__ __volatile__(" rep; nop                 \n");
  }

• AArch64 platform (rep command is not supported)

  define pg_spin_delay_impl()    ((void)0)