Tianocore/edk2.git/FmpDevicePkg/Include/Library/FmpDependencyCheckLib.h, branch master

FmpDevicePkg: 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

FmpDevicePkg: Change OPTIONAL keyword usage style

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

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3760 Update all use of ', OPTIONAL' to ' OPTIONAL,' for function params. Cc: Andrew Fish Cc: Leif Lindholm Cc: Michael Kubacki Signed-off-by: Michael D Kinney Reviewed-by: Liming Gao

FmpDevicePkg: Add Last Attempt Status support to dependency libs

2020-10-28T06:05:52+00:00

The FMP dependency libraries are leveraged during firmware update to check for dependencies required to update the image. This change adds granular Last Attempt Status code support to these services so failures can be more easily observed during the firmware update process via Last Attempt Status codes. Cc: Liming Gao Cc: Michael D Kinney Cc: Guomin Jiang Cc: Wei6 Xu Signed-off-by: Michael Kubacki Acked-by: Liming Gao Reviewed-by: Wei6 Xu Reviewed-by: Michael D Kinney

FmpDevicePkg: Add FmpDependencyCheck library class and instances

2020-05-15T06:11:44+00:00

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2696 * This library class provides platform specific services to support dependency check during updating firmware image. Platform can perform dependency check in platform specific manner by implementing its own FmpDependencyCheckLib. * Add FmpDependencyCheck instance to provide a sample of dependency check. The sample instance only checks the dependency from capsule image. The dependency from other FMP instances isn't checked here. * Add NULL instance as an option to skip the dependency check. Cc: Michael D Kinney Cc: Liming Gao Cc: Sean Brogan Signed-off-by: Wei6 Xu Reviewed-by: Sean Brogan Reviewed-by: Liming Gao