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https://github.com/tianocore/edk2
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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>
128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/** @file
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The Esrt Management Protocol used to register/set/update an updatable firmware resource .
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Copyright (c) 2015 - 2018, 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 <Guid/SystemResourceTable.h>
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///
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/// Global ID for the ESRT_MANAGEMENT_PROTOCOL.
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///
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#define ESRT_MANAGEMENT_PROTOCOL_GUID \
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{ \
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0xa340c064, 0x723c, 0x4a9c, { 0xa4, 0xdd, 0xd5, 0xb4, 0x7a, 0x26, 0xfb, 0xb0 } \
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}
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///
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/// Forward declaration for the _ESRT_MANAGEMENT_PROTOCOL.
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///
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typedef struct _ESRT_MANAGEMENT_PROTOCOL ESRT_MANAGEMENT_PROTOCOL;
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/**
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Get Variable name and data by Esrt Entry FwClass
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@param[in] FwClass FwClass of Esrt entry to get
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@param[in out] Entry Esrt entry returned
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@retval EFI_SUCCESS The variable saving this Esrt Entry exists.
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@retval EF_NOT_FOUND No correct variable found.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *GET_ESRT_ENTRY)(
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IN EFI_GUID *FwClass,
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IN OUT EFI_SYSTEM_RESOURCE_ENTRY *Entry
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);
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/**
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Update one ESRT entry in ESRT Cache.
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@param[in] Entry Esrt entry to be updated
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@retval EFI_SUCCESS Successfully update an ESRT entry in cache.
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@retval EFI_INVALID_PARAMETER Entry does't exist in ESRT Cache
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@retval EFI_WRITE_PROTECTED ESRT Cache repositoy is locked
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**/
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typedef
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EFI_STATUS
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(EFIAPI *UPDATE_ESRT_ENTRY)(
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IN EFI_SYSTEM_RESOURCE_ENTRY *Entry
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);
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/**
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Non-FMP instance to unregister Esrt Entry from ESRT Cache.
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@param[in] FwClass FwClass of Esrt entry to Unregister
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@retval EFI_SUCCESS Insert all entries Successfully
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@retval EFI_NOT_FOUND FwClass does not exsit
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**/
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typedef
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EFI_STATUS
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(EFIAPI *UNREGISTER_ESRT_ENTRY)(
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IN EFI_GUID *FwClass
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);
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/**
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Non-FMP instance to register one ESRT entry into ESRT Cache.
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@param[in] Entry Esrt entry to be set
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@retval EFI_SUCCESS Successfully set a variable.
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@retval EFI_INVALID_PARAMETER ESRT Entry is already exist
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@retval EFI_OUT_OF_RESOURCES Non-FMP ESRT repository is full
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**/
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typedef
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EFI_STATUS
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(EFIAPI *REGISTER_ESRT_ENTRY)(
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IN EFI_SYSTEM_RESOURCE_ENTRY *Entry
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);
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/**
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This function syn up Cached ESRT with data from FMP instances
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Function should be called after Connect All in order to locate all FMP protocols
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installed
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@retval EFI_SUCCESS Successfully sync cache repository from FMP instances
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@retval EFI_NOT_FOUND No FMP Instance are found
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@retval EFI_OUT_OF_RESOURCES Resource allocaton fail
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**/
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typedef
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EFI_STATUS
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(EFIAPI *SYNC_ESRT_FMP)(
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VOID
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);
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/**
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This function locks up Esrt repository to be readonly. It should be called
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before gEfiEndOfDxeEventGroupGuid event signaled
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@retval EFI_SUCCESS Locks up FMP Non-FMP repository successfully
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**/
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typedef
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EFI_STATUS
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(EFIAPI *LOCK_ESRT_REPOSITORY)(
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VOID
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);
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struct _ESRT_MANAGEMENT_PROTOCOL {
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GET_ESRT_ENTRY GetEsrtEntry;
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UPDATE_ESRT_ENTRY UpdateEsrtEntry;
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REGISTER_ESRT_ENTRY RegisterEsrtEntry;
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UNREGISTER_ESRT_ENTRY UnRegisterEsrtEntry;
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SYNC_ESRT_FMP SyncEsrtFmp;
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LOCK_ESRT_REPOSITORY LockEsrtRepository;
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};
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extern EFI_GUID gEsrtManagementProtocolGuid;
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