Tianocore/edk2.git/DynamicTablesPkg/Include/Library/HwInfoParserLib.h, branch master

DynamicTablesPkg: Replace include guards with #pragma once

2026-02-23T21:01:28+00:00

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

DynamicTablesPkg: Add helper to add CmObj with given token

2025-10-13T10:45:45+00:00

Implement function to add a CmObj with a token provided by the caller. This is intended to be used with abstract tokens, the value of which is generated by the caller. Signed-off-by: Sarah Walker

DynamicTablesPkg: Remove duplicated words

2022-12-13T14:30:20+00:00

In an effort to clean the documentation of the above package, remove duplicated words. Cc: Sami Mujawar Cc: Alexei Fedorov Signed-off-by: Pierre Gondois Reviewed-by: Sami Mujawar

DynamicTablesPkg: Definition for HwInfoParser interface

2021-12-14T16:07:00+00:00

Hardware information parser is an optional module defined by the Dynamic Tables Framework. It can either parse an XML, a Device Tree or a Json file containing the platform hardware information to populate the platform information repository. The Configuration Manager can then utilise this information to generate ACPI tables for the platform. Therefore, define an interface for the HwInfoParser library class. Signed-off-by: Pierre Gondois Co-authored-by: Sami Mujawar Reviewed-by: Joey Gouly