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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>
97 lines
4 KiB
C
97 lines
4 KiB
C
/** @file
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Internal include file for Report Status Code Router PEIM.
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Copyright (c) 2009 - 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 <Ppi/ReportStatusCodeHandler.h>
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#include <Ppi/StatusCode.h>
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#include <Guid/StatusCodeCallbackGuid.h>
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#include <Library/DebugLib.h>
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#include <Library/HobLib.h>
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#include <Library/PeiServicesLib.h>
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#include <Library/PeimEntryPoint.h>
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/**
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Register the callback function for ReportStatusCode() notification.
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When this function is called the function pointer is added to an internal list and any future calls to
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ReportStatusCode() will be forwarded to the Callback function.
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@param[in] Callback A pointer to a function of type EFI_PEI_RSC_HANDLER_CALLBACK that is called
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when a call to ReportStatusCode() occurs.
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@retval EFI_SUCCESS Function was successfully registered.
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@retval EFI_INVALID_PARAMETER The callback function was NULL.
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@retval EFI_OUT_OF_RESOURCES The internal buffer ran out of space. No more functions can be
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registered.
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@retval EFI_ALREADY_STARTED The function was already registered. It can't be registered again.
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**/
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EFI_STATUS
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EFIAPI
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Register (
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IN EFI_PEI_RSC_HANDLER_CALLBACK Callback
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);
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/**
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Remove a previously registered callback function from the notification list.
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ReportStatusCode() messages will no longer be forwarded to the Callback function.
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@param[in] Callback A pointer to a function of type EFI_PEI_RSC_HANDLER_CALLBACK that is to be
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unregistered.
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@retval EFI_SUCCESS The function was successfully unregistered.
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@retval EFI_INVALID_PARAMETER The callback function was NULL.
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@retval EFI_NOT_FOUND The callback function was not found to be unregistered.
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**/
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EFI_STATUS
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EFIAPI
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Unregister (
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IN EFI_PEI_RSC_HANDLER_CALLBACK Callback
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);
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/**
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Publishes an interface that allows PEIMs to report status codes.
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This function implements EFI_PEI_PROGRESS_CODE_PPI.ReportStatusCode().
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It publishes an interface that allows PEIMs to report status codes.
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@param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.
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@param CodeType Indicates the type of status code being reported.
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@param Value Describes the current status of a hardware or
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software entity. This includes information about the class and
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subclass that is used to classify the entity as well as an operation.
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For progress codes, the operation is the current activity.
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For error codes, it is the exception.For debug codes,it is not defined at this time.
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@param Instance The enumeration of a hardware or software entity within
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the system. A system may contain multiple entities that match a class/subclass
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pairing. The instance differentiates between them. An instance of 0 indicates
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that instance information is unavailable, not meaningful, or not relevant.
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Valid instance numbers start with 1.
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@param CallerId This optional parameter may be used to identify the caller.
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This parameter allows the status code driver to apply different rules to
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different callers.
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@param Data This optional parameter may be used to pass additional data.
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@retval EFI_SUCCESS The function completed successfully.
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**/
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EFI_STATUS
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EFIAPI
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ReportDispatcher (
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IN CONST EFI_PEI_SERVICES **PeiServices,
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IN EFI_STATUS_CODE_TYPE CodeType,
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IN EFI_STATUS_CODE_VALUE Value,
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IN UINT32 Instance,
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IN CONST EFI_GUID *CallerId OPTIONAL,
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IN CONST EFI_STATUS_CODE_DATA *Data OPTIONAL
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);
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