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https://github.com/Dasharo/edk2-upstream.git
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Michael Kubackiandmergify[bot]
7a934d0bef
Replace traditional `#ifndef`/`#define`/`#endif` include guards with
`#pragma` once.
`#pragma once` is a widely supported preprocessor directive that
prevents header files from being included multiple times. It is
supported by all toolchains used to build edk2: GCC, Clang/LLVM, and
MSVC.
Compared to macro-based include guards, `#pragma once`:
- Eliminates the risk of macro name collisions or copy/paste errors
where two headers inadvertently use the same guard macro.
- Eliminate inconsistency in the way include guard macros are named
(e.g., some files use `__FILE_H__`, others use `FILE_H_`, etc.).
- Reduces boilerplate (three lines replaced by one).
- Avoids polluting the macro namespace with guard symbols.
- Can improve build times as the preprocessor can skip re-opening the
file entirely, rather than re-reading it to find the matching
`#endif` ("multiple-include optimization").
- Note that some compilers may already optimize traditional include
guards, by recognzining the idiomatic pattern.
This change is made acknowledging that overall portability of the
code will technically be reduced, as `#pragma once` is not part of the
C/C++ standards.
However, this is considered acceptable given:
1. edk2 already defines a subset of supported compilers in
BaseTools/Conf/tools_def.template, all of which have supported
`#pragma once` for over two decades.
2. There have been concerns raised to the project about inconsistent
include guard naming and potential macro collisions.
Approximate compiler support dates:
- MSVC: Supported since Visual C++ 4.2 (1996)
- GCC: Supported since 3.4 (2004)
(http://gnu.ist.utl.pt/software/gcc/gcc-3.4/changes.html)
- Clang (LLVM based): Since initial release in 2007
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
117 lines
4.2 KiB
C
117 lines
4.2 KiB
C
/** @file
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Variable check definitions.
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Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#pragma once
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#include <Uefi/UefiSpec.h>
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typedef struct _EDKII_VAR_CHECK_PROTOCOL EDKII_VAR_CHECK_PROTOCOL;
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#define EDKII_VAR_CHECK_PROTOCOL_GUID {\
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0xaf23b340, 0x97b4, 0x4685, { 0x8d, 0x4f, 0xa3, 0xf2, 0x81, 0x69, 0xb2, 0x1d } \
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};
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typedef EFI_SET_VARIABLE VAR_CHECK_SET_VARIABLE_CHECK_HANDLER;
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/**
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Register SetVariable check handler.
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Variable driver will call the handler to do check before
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really setting the variable into variable storage.
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@param[in] Handler Pointer to the check handler.
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@retval EFI_SUCCESS The SetVariable check handler was registered successfully.
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@retval EFI_INVALID_PARAMETER Handler is NULL.
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@retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has already been signaled.
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@retval EFI_OUT_OF_RESOURCES There is not enough resource for the SetVariable check handler register request.
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@retval EFI_UNSUPPORTED This interface is not implemented.
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For example, it is unsupported in VarCheck protocol if both VarCheck and SmmVarCheck protocols are present.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EDKII_VAR_CHECK_REGISTER_SET_VARIABLE_CHECK_HANDLER)(
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IN VAR_CHECK_SET_VARIABLE_CHECK_HANDLER Handler
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);
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#define VAR_CHECK_VARIABLE_PROPERTY_REVISION 0x0001
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//
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// 1. Set by VariableLock PROTOCOL
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// 2. Set by VarCheck PROTOCOL
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//
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// If set, other fields for check will be ignored.
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//
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#define VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY BIT0
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typedef struct {
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UINT16 Revision;
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UINT16 Property;
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UINT32 Attributes;
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UINTN MinSize;
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UINTN MaxSize;
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} VAR_CHECK_VARIABLE_PROPERTY;
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typedef struct {
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EFI_GUID *Guid;
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CHAR16 *Name;
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VAR_CHECK_VARIABLE_PROPERTY VariableProperty;
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} VARIABLE_ENTRY_PROPERTY;
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/**
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Variable property set.
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Variable driver will do check according to the VariableProperty before
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really setting the variable into variable storage.
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@param[in] Name Pointer to the variable name.
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@param[in] Guid Pointer to the vendor GUID.
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@param[in] VariableProperty Pointer to the input variable property.
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@retval EFI_SUCCESS The property of variable specified by the Name and Guid was set successfully.
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@retval EFI_INVALID_PARAMETER Name, Guid or VariableProperty is NULL, or Name is an empty string,
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or the fields of VariableProperty are not valid.
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@retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has
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already been signaled.
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@retval EFI_OUT_OF_RESOURCES There is not enough resource for the variable property set request.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EDKII_VAR_CHECK_VARIABLE_PROPERTY_SET)(
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IN CHAR16 *Name,
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IN EFI_GUID *Guid,
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IN VAR_CHECK_VARIABLE_PROPERTY *VariableProperty
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);
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/**
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Variable property get.
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@param[in] Name Pointer to the variable name.
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@param[in] Guid Pointer to the vendor GUID.
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@param[out] VariableProperty Pointer to the output variable property.
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@retval EFI_SUCCESS The property of variable specified by the Name and Guid was got successfully.
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@retval EFI_INVALID_PARAMETER Name, Guid or VariableProperty is NULL, or Name is an empty string.
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@retval EFI_NOT_FOUND The property of variable specified by the Name and Guid was not found.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EDKII_VAR_CHECK_VARIABLE_PROPERTY_GET)(
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IN CHAR16 *Name,
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IN EFI_GUID *Guid,
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OUT VAR_CHECK_VARIABLE_PROPERTY *VariableProperty
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);
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struct _EDKII_VAR_CHECK_PROTOCOL {
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EDKII_VAR_CHECK_REGISTER_SET_VARIABLE_CHECK_HANDLER RegisterSetVariableCheckHandler;
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EDKII_VAR_CHECK_VARIABLE_PROPERTY_SET VariablePropertySet;
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EDKII_VAR_CHECK_VARIABLE_PROPERTY_GET VariablePropertyGet;
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};
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extern EFI_GUID gEdkiiVarCheckProtocolGuid;
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