MdePkg/Library/BaseLib/Ia32/CpuPause.c

   1 /** @file
   2   CpuPause function.
   3
   4   Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
   5   SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9
  10
  11
  12 /**
  13   Requests CPU to pause for a short period of time.
  14
  15   Requests CPU to pause for a short period of time. Typically used in MP
  16   systems to prevent memory starvation while waiting for a spin lock.
  17
  18 **/
  19 VOID
  20 EFIAPI
  21 CpuPause (
  22   VOID
  23   )
  24 {
  25   _asm {
  26     pause
  27   }
  28 }
  29