Tianocore/edk2.git/MdeModulePkg/Include/Guid/PcdDataBaseSignatureGuid.h, branch master

MdeModulePkg: 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

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

MdeModulePkg: Replace BSD License with BSD+Patent License

2019-04-09T17:58:08+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: Hao Wu Reviewed-by: Jian J Wang

MdeModulePkg PCD: Remove PCD_TYPE_SKU_ENABLED in PCD_TYPE_ALL_SET

2018-03-13T12:50:20+00:00

Remove PCD_TYPE_SKU_ENABLED in PCD_TYPE_ALL_SET. This change was missing at e8d2a9805286a2fd4f613697cf0cccb4a1ebc90d. Cc: Liming Gao Cc: Thomas Lamprecht Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Star Zeng Tested-by: Thomas Lamprecht Acked-by: Ard Biesheuvel Reviewed-by: Eric Dong

MdeModulePkg PCD: Remove unused PCD attribute PCD_TYPE_SKU_ENABLED

2018-03-13T07:57:05+00:00

PcdDb optimization has handled PCD DB for each SKU, not for single PCD. So, this PCD attribute is not used any more. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Liming Gao Reviewed-by: Star Zeng

MdeModulePkg: Update PCD driver to support the optimized PcdDataBase

2017-12-25T03:05:57+00:00

https://bugzilla.tianocore.org/show_bug.cgi?id=546 BaseTools will generate the optimized PCD database to save the image size at build time for multiple SKUs. The optimized PCD database layout will be like below, the PCD database will be composed of the full default SKU data (PCD_DATABASE_INIT) and the non-default SKU delta data(PCD_DATABASE_SKU_DELTA). PCD driver will build HOB to store the full default SKU data, and patch HOB data based on non-default SKU delta data for the SKU set by SetSku(), it can save memory resource at boot time. // // PCD database layout: // +---------------------------------+ // | PCD_DATABASE_INIT (DEFAULT SKU) | // +---------------------------------+ // | PCD_DATABASE_SKU_DELTA (SKU A) | // +---------------------------------+ // | PCD_DATABASE_SKU_DELTA (SKU B) | // +---------------------------------+ // | ...... | // +---------------------------------+ // BaseTools, PCD database and driver updates are needed for this proposal. For single SKU (default) case, this proposal is expected to have no impact. For multi-SKU case, PCD database format will be changed. So, PcdDataBase Version is also updated from 6 to 7. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Liming Gao Reviewed-by: Star Zeng

MdeModulePkg: Enable Firmware to retrieve the default setting

2017-12-25T03:05:55+00:00

https://bugzilla.tianocore.org/show_bug.cgi?id=611 Add two PCDs and new PCD DB format definition Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Liming Gao Reviewed-by: Star Zeng

MdeModulePkg PCD: Update PCD database structure definition to match BaseTools

2016-09-20T08:50:52+00:00

To follow PI1.4a, BaseTools has be updated to fix artificial limitation of SkuId range. This patch is to update PCD database structure definition to match BaseTools. Note: The source code and BaseTools need to be upgraded at the same time, and if they are not upgraded at the same time, build error like below will be triggered to help user identify the problem. "Please make sure the version of PCD PEIM Service and the generated PCD PEI Database match." Cc: Liming Gao Cc: Yonghong Zhu Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Star Zeng Reviewed-by: Liming Gao

MdeModulePkg: Add ATTRIBUTE (+/-RT, RO) support in PCD declaration in DSC file.

2015-04-10T09:01:46+00:00

Also update PCD_SERVICE_PEI_VERSION and PCD_SERVICE_DXE_VERSION to match with the new PcdDataBase binary generated by BaseTools. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Star Zeng Reviewed-by: Liming Gao Reviewed-by: Jiewen Yao git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17161 6f19259b-4bc3-4df7-8a09-765794883524

MdePkg and MdeModulePkg Pcd: Implement PCD Driver for External PCD Database and SKU enable Feature.

2013-11-18T07:45:49+00:00

Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Bob C Feng Reviewed-by: Liming Gao Reviewed-by: Star Zeng git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14857 6f19259b-4bc3-4df7-8a09-765794883524