ThunkPpiList.c

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#include <PiPei.h>
#include <Library/BaseLib.h>
#include <Library/MemoryAllocationLib.h>
 
UINTN                   gThunkPpiListSize = 0;
EFI_PEI_PPI_DESCRIPTOR  *gThunkPpiList    = NULL;
 
EFI_PEI_PPI_DESCRIPTOR *
GetThunkPpiList (
  VOID
  )
{
  UINTN  Index;
 
  if (gThunkPpiList == NULL) {
    return NULL;
  }
 
  Index                       = (gThunkPpiListSize/sizeof (EFI_PEI_PPI_DESCRIPTOR)) - 1;
  gThunkPpiList[Index].Flags |= EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST;
 
  return gThunkPpiList;
}
 
EFI_STATUS
EFIAPI
AddThunkPpi (
  IN  UINTN     Flags,
  IN  EFI_GUID  *Guid,
  IN  VOID      *Ppi
  )
{
  UINTN  Index;
 
  gThunkPpiList = ReallocatePool (
                    gThunkPpiListSize,
                    gThunkPpiListSize + sizeof (EFI_PEI_PPI_DESCRIPTOR),
                    gThunkPpiList
                    );
  if (gThunkPpiList == NULL) {
    return EFI_OUT_OF_RESOURCES;
  }
 
  Index                      = (gThunkPpiListSize/sizeof (EFI_PEI_PPI_DESCRIPTOR));
  gThunkPpiList[Index].Flags = Flags;
  gThunkPpiList[Index].Guid  = Guid;
  gThunkPpiList[Index].Ppi   = Ppi;
  gThunkPpiListSize         += sizeof (EFI_PEI_PPI_DESCRIPTOR);
 
  return EFI_SUCCESS;
}