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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>
73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
/** @file
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Defines several datastructures used by Capsule On Disk feature.
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They are mainly used for FAT files.
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Copyright (c) 2019, 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.h>
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#include <Pi/PiMultiPhase.h>
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#include <Library/UefiLib.h>
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#include <Library/DebugLib.h>
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#include <Library/BaseLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/UefiRuntimeServicesTableLib.h>
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#include <Library/UefiRuntimeLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/FileHandleLib.h>
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#include <Library/CapsuleLib.h>
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#include <Library/DevicePathLib.h>
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#include <Library/PrintLib.h>
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#include <Library/UefiBootManagerLib.h>
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#include <Protocol/SimpleFileSystem.h>
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#include <Protocol/DiskIo.h>
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#include <Protocol/BlockIo.h>
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#include <Guid/CapsuleVendor.h>
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#include <Guid/FileInfo.h>
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#include <Guid/GlobalVariable.h>
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//
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// This data structure is the part of FILE_INFO_ENTRY
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//
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#define FILE_INFO_SIGNATURE SIGNATURE_32 ('F', 'L', 'I', 'F')
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//
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// LoadOptionNumber of the boot option where the capsules is relocated.
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//
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#define COD_RELOCATION_LOAD_OPTION_VAR_NAME L"CodRelocationLoadOption"
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//
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// (20 * (6+5+2))+1) unicode characters from EFI FAT spec (doubled for bytes)
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//
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#define MAX_FILE_NAME_SIZE 522
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#define MAX_FILE_NAME_LEN (MAX_FILE_NAME_SIZE / sizeof(CHAR16))
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#define MAX_FILE_INFO_LEN (OFFSET_OF(EFI_FILE_INFO, FileName) + MAX_FILE_NAME_LEN)
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typedef struct {
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UINTN Signature;
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LIST_ENTRY Link; /// Linked list members.
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EFI_FILE_INFO *FileInfo; /// Pointer to the FileInfo struct for this file or NULL.
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CHAR16 *FileNameFirstPart; /// Text to the left of right-most period in the file name. String is capitialized
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CHAR16 *FileNameSecondPart; /// Text to the right of right-most period in the file name.String is capitialized. Maybe NULL
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} FILE_INFO_ENTRY;
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typedef struct {
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//
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// image address.
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//
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VOID *ImageAddress;
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//
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// The file info of the image comes from.
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// if FileInfo == NULL. means image does not come from file
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//
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EFI_FILE_INFO *FileInfo;
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} IMAGE_INFO;
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