Tianocore/edk2.git/DynamicTablesPkg/Include/Library/AcpiHelperLib.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: Apply uncrustify changes

2021-12-07T17:24:28+00:00

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737 Apply uncrustify changes to .c/.h files in the DynamicTablesPkg package Cc: Andrew Fish Cc: Leif Lindholm Cc: Michael D Kinney Signed-off-by: Michael Kubacki Reviewed-by: Sami Mujawar

DynamicTablesPkg: Add AmlGetEisaIdFromString() to AcpiHelperLib

2021-10-01T10:57:43+00:00

Add a function converting a 7 characters string to its UINT32 EISAID. The algorithm used to create the EISAID is described in the ACPI 6.4 specification, s19.3.4 "ASL Macros". Reviewed-by: Sami Mujawar Signed-off-by: Pierre Gondois

DynamicTablesPkg: Add HexFromAscii() to AcpiHelperLib

2021-10-01T10:57:43+00:00

Add HexFromAscii(), converting an hexadecimal ascii char to an integer. Reviewed-by: Sami Mujawar Signed-off-by: Pierre Gondois

DynamicTablesPkg: Rename single char input parameter

2021-10-01T10:57:43+00:00

The Ecc tool forbids the usage of one char variable: Ecc error 8007: "There should be no use of short (single character) variable names" To follow this policy, rename this one letter parameter. Reviewed-by: Sami Mujawar Signed-off-by: Pierre Gondois

DynamicTablesPkg: Extract AcpiHelperLib from TableHelperLib

2021-10-01T10:57:43+00:00

The TableHelperLib contains helper functions. Some rely on DynamicTablesPkg definitions (they use Configuration Manager objects). Some others are more generic. To allow using these generic functions without including DynamicTablesPkg definitions, move them to a new AcpiHelperLib library. Reviewed-by: Sami Mujawar Signed-off-by: Pierre Gondois