EdkCompatibilityPkg/Compatibility/FrameworkHiiToUefiHiiThunk/HiiHandle.c

   1 /**@file
   2   This file is for functins related to assign and free Framework HII handle number.
   3
   4 Copyright (c) 2008, Intel Corporation
   5 All rights reserved. This program and the accompanying materials
   6 are licensed and made available under the terms and conditions of the BSD License
   7 which accompanies this distribution.  The full text of the license may be found at
   8 http://opensource.org/licenses/bsd-license.php
   9
  10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15
  16 #include "HiiHandle.h"
  17
  18 //
  19 // FRAMEWORK_EFI_HII_HANDLE
  20 //
  21 UINT8 mHandle[1024 * 8] = {0};
  22
  23 VOID
  24 InitHiiHandleDatabase (
  25   VOID
  26   )
  27 {
  28   //
  29   // FRAMEWORK_EFI_HII_HANDLE 0 is reserved.
  30   // Set Bit 0 in mHandle[0] to 1.
  31   //
  32   mHandle[0] |= 1 << 0;
  33 }
  34
  35
  36 EFI_STATUS
  37 AllocateHiiHandle (
  38   FRAMEWORK_EFI_HII_HANDLE *Handle
  39   )
  40 {
  41   UINTN       Index;
  42
  43   for (Index = 0; Index < sizeof (mHandle) * 8; Index++) {
  44     if ((mHandle[Index / 8] & (1 << (Index % 8))) == 0) {
  45       mHandle[Index / 8] = (UINT8) (mHandle[Index / 8] | (1 << (Index % 8)));
  46       *Handle = (FRAMEWORK_EFI_HII_HANDLE) Index;
  47       ASSERT (*Handle != 0);
  48       return EFI_SUCCESS;
  49     }
  50   }
  51
  52   return EFI_OUT_OF_RESOURCES;
  53 }
  54
  55 VOID
  56 FreeHiiHandle (
  57   FRAMEWORK_EFI_HII_HANDLE Handle
  58   )
  59 {
  60   UINT16 Num;
  61
  62   Num = (UINT16) Handle;
  63
  64   ASSERT ((mHandle [Num / 8] & (1 << (Num % 8))) != 0);
  65   mHandle [Num / 8] = (UINT8) (mHandle [Num / 8] & (~(1 << (Num % 8))));
  66 }