mirror of https://github.com/acidanthera/audk.git
86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
/**@file
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This file is for functins related to assign and free Framework HII handle number.
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Copyright (c) 2008, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "HiiHandle.h"
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//
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// FRAMEWORK_EFI_HII_HANDLE
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//
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UINT8 mHandle[1024 * 8] = {0};
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/**
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Initialize the Framework Hii Handle database.
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**/
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VOID
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InitHiiHandleDatabase (
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VOID
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)
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{
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//
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// FRAMEWORK_EFI_HII_HANDLE 0 is reserved.
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// Set Bit 0 in mHandle[0] to 1.
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//
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mHandle[0] |= 1 << 0;
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}
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/**
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Allocate a new Framework HII handle.
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@param Handle Returns the new Framework HII Handle assigned.
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@retval EFI_SUCCESS A new Framework HII Handle is assigned.
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@retval EFI_OUT_OF_RESOURCE The Framework HII Handle database is depleted.
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**/
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EFI_STATUS
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AllocateHiiHandle (
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OUT FRAMEWORK_EFI_HII_HANDLE *Handle
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)
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{
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UINTN Index;
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for (Index = 0; Index < sizeof (mHandle) * 8; Index++) {
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if ((mHandle[Index / 8] & (1 << (Index % 8))) == 0) {
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mHandle[Index / 8] = (UINT8) (mHandle[Index / 8] | (1 << (Index % 8)));
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*Handle = (FRAMEWORK_EFI_HII_HANDLE) Index;
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ASSERT (*Handle != 0);
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return EFI_SUCCESS;
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}
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}
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return EFI_OUT_OF_RESOURCES;
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}
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/**
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Free Framework HII handle.
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@param Handle The Framework HII Handle to be freed.
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**/
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VOID
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FreeHiiHandle (
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IN FRAMEWORK_EFI_HII_HANDLE Handle
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)
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{
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UINT16 Num;
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Num = (UINT16) Handle;
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ASSERT ((mHandle [Num / 8] & (1 << (Num % 8))) != 0);
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mHandle [Num / 8] = (UINT8) (mHandle [Num / 8] & (~(1 << (Num % 8))));
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}
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