DebugLibConstructor.c

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#include <Uefi.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
 
//
// BOOLEAN value to indicate if it is at the post ExitBootServices phase
//
BOOLEAN  mPostEBS = FALSE;
 
static EFI_EVENT  mExitBootServicesEvent;
 
//
// Pointer to SystemTable
// This library instance may have a cycle consume with UefiBootServicesTableLib
// because of the constructors.
//
EFI_BOOT_SERVICES  *mDebugBS;
 
static
VOID
EFIAPI
UefiDebugLibDebugPortProtocolExitBootServicesCallback (
  EFI_EVENT  Event,
  VOID       *Context
  )
{
  mPostEBS = TRUE;
  return;
}
 
EFI_STATUS
EFIAPI
DxeDebugLibConstructor (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  mDebugBS = SystemTable->BootServices;
 
  mDebugBS->CreateEvent (
              EVT_SIGNAL_EXIT_BOOT_SERVICES,
              TPL_NOTIFY,
              UefiDebugLibDebugPortProtocolExitBootServicesCallback,
              NULL,
              &mExitBootServicesEvent
              );
 
  return EFI_SUCCESS;
}
 
EFI_STATUS
EFIAPI
DxeDebugLibDestructor (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  if (mExitBootServicesEvent != NULL) {
    SystemTable->BootServices->CloseEvent (mExitBootServicesEvent);
  }
 
  return EFI_SUCCESS;
}