Tianocore/edk2.git/MdePkg/Library/BaseSynchronizationLib, branch dependabot/github_actions/actions/setup-python-7

MdePkg: 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

MdePkg: Remove ARM32 Support from BaseSynchronizationLib

2025-09-25T22:04:10+00:00

edk2 is dropping support for the ARM32 architecture. This commit removes ARM32 code from BaseSynchronizationLib. Signed-off-by: Oliver Smith-Denny

BaseSynchronizationLib: Fix LoongArch64 synchronization functions

2023-05-05T13:10:09+00:00

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4432 There is a return value bug: The sc.w/sc.d instruction will destroy the reg_t0, use reg_t1 to avoid context reg_t0 being corrupted. Adjust Check that ptr align is UINT16. Optimize function SyncIncrement and SyncDecrement. Cc: Michael D Kinney Cc: Liming Gao Cc: Zhiguang Liu Cc: Chao Li Signed-off-by: Dongyan Qian Reviewed-by: Chao Li

MdePkg/BaseSynchronizationLib AARCH64: Make asm files BTI compatible

2023-03-30T11:05:22+00:00

Add the BTI instructions and the associated note to make the AArch64 asm objects compatible with BTI enforcement. Signed-off-by: Ard Biesheuvel Reviewed-by: Leif Lindholm Reviewed-by: Oliver Smith-Denny

BaseSynchronizationLib: Fix RISC-V helper name

2022-11-29T09:53:15+00:00

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4143 Fix the name of InternalSyncCompareExchange64() function. Signed-off-by: Sunil V L Reported-by: Zhihao Li Tested-by: Zhihao Li Cc: Michael D Kinney Cc: Liming Gao Cc: Zhiguang Liu Cc: Daniel Schaefer Reviewed-by: Liming Gao

MdePkg/BaseSynchronizationLib: LoongArch cache related code.

2022-10-14T02:16:33+00:00

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4053 Support LoongArch cache related functions. Cc: Michael D Kinney Cc: Liming Gao Cc: Zhiguang Liu Signed-off-by: Chao Li Co-authored-by: Baoqi Zhang Reviewed-by: Michael D Kinney

MdePkg: Remove RVCT support

2022-05-13T14:58:54+00:00

RVCT is obsolete and no longer used. Remove support for it. Signed-off-by: Rebecca Cran Reviewed-by: Ard Biesheuvel

MdePkg: 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 MdePkg package Cc: Andrew Fish Cc: Leif Lindholm Cc: Michael D Kinney Signed-off-by: Michael Kubacki Reviewed-by: Liming Gao

MdePkg/BaseSynchronizationLib: RISC-V cache related code.

2020-05-07T03:17:15+00:00

Support RISC-V cache related functions. REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2672 Signed-off-by: Abner Chang Co-authored-by: Gilbert Chen Reviewed-by: Leif Lindholm Reviewed-by: Zhiguang Liu Reviewed-by: Liming Gao Cc: Michael D Kinney Cc: Liming Gao Cc: Leif Lindholm Cc: Gilbert Chen

MdePkg: Replace BSD License with BSD+Patent License

2019-04-09T17:58:13+00:00

https://bugzilla.tianocore.org/show_bug.cgi?id=1373 Replace BSD 2-Clause License with BSD+Patent License. This change is based on the following emails: https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html RFCs with detailed process for the license change: V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael D Kinney Reviewed-by: Liming Gao