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
  10 #include "BaseLibInternals.h"
  11
  12
  13 /**
  14   Retrieves the current CPU interrupt state.
  15
  16   Returns TRUE is interrupts are currently enabled. Otherwise
  17   returns FALSE.
  18
  19   @retval TRUE  CPU interrupts are enabled.
  20   @retval FALSE CPU interrupts are disabled.
  21
  22 **/
  23 BOOLEAN
  24 EFIAPI
  25 GetInterruptState (
  26   VOID
  27   )
  28 {
  29   IA32_EFLAGS32                     EFlags;
  30
  31   EFlags.UintN = AsmReadEflags ();
  32   return (BOOLEAN)(1 == EFlags.Bits.IF);
  33 }
  34
  35