MdePkg/Library/BaseLib/X86GetInterruptState.c

   1 /** @file
   2   IA-32/x64 GetInterruptState()
   3
   4   Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
   5   SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9 #include "BaseLibInternals.h"
  10
  11 /**
  12   Retrieves the current CPU interrupt state.
  13
  14   Returns TRUE is interrupts are currently enabled. Otherwise
  15   returns FALSE.
  16
  17   @retval TRUE  CPU interrupts are enabled.
  18   @retval FALSE CPU interrupts are disabled.
  19
  20 **/
  21 BOOLEAN
  22 EFIAPI
  23 GetInterruptState (
  24   VOID
  25   )
  26 {
  27   IA32_EFLAGS32  EFlags;
  28
  29   EFlags.UintN = AsmReadEflags ();
  30   return (BOOLEAN)(1 == EFlags.Bits.IF);
  31 }