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2026-02-24MdePkg: Replace include guards with #pragma onceMichael Kubacki1-4/+1
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 <michael.kubacki@microsoft.com>
2025-06-11MdePkg: Fix definition typosDongyan Qian1-1/+1
`defintion`->`definition` Signed-off-by: Dongyan Qian <qiandongyan@loongson.cn>
2021-12-07MdePkg: Apply uncrustify changesMichael Kubacki1-7/+6
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737 Apply uncrustify changes to .c/.h files in the MdePkg package Cc: Andrew Fish <afish@apple.com> Cc: Leif Lindholm <leif@nuviainc.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com> Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
2019-04-09MdePkg: Replace BSD License with BSD+Patent LicenseMichael D Kinney1-7/+1
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 <michael.d.kinney@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>
2018-06-28MdePkg: Clean up source filesLiming Gao1-27/+27
1. Do not use tab characters 2. No trailing white space in one line 3. All files must end with CRLF Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Liming Gao <liming.gao@intel.com>
2010-04-23Update the copyright notice formathhtian1-1/+1
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10403 6f19259b-4bc3-4df7-8a09-765794883524
2010-03-13Grammatical and disclaimer changes (does not follow internal C coding stds.)myronporter1-16/+16
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10235 6f19259b-4bc3-4df7-8a09-765794883524
2009-09-03Clarify the UEFI/EFI specification version in file header comments.vanjeff1-2/+4
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9238 6f19259b-4bc3-4df7-8a09-765794883524
2009-02-06code scrub for UefiPxeBcDxe.jgong51-0/+10
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7452 6f19259b-4bc3-4df7-8a09-765794883524
2008-12-09Add the detailed descriptions for the structure data member in these protocol.lgao41-8/+8
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6935 6f19259b-4bc3-4df7-8a09-765794883524
2008-12-08Add comments for most of enum data type.lgao41-0/+6
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6924 6f19259b-4bc3-4df7-8a09-765794883524
2008-11-19Update comments for Protocol definitions to match UEFI spec. And add the ↵lgao41-1/+5
missing comments for the data structure. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6636 6f19259b-4bc3-4df7-8a09-765794883524
2008-10-13Formalize comments for Protocols and PPIs.xli241-6/+4
1. Use doxygen format for Protocol/PPI data structure 2. Remove doxygen comments for function elements in Protocol/Ppi 3. Use doxygen format for data elements in Protocol/Ppi, and add missing comments where necessary 4. PEI Services Table is also updated accordingly. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6107 6f19259b-4bc3-4df7-8a09-765794883524
2008-10-09Fix doxygen comment for structure and macroklu21-9/+5
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6097 6f19259b-4bc3-4df7-8a09-765794883524
2008-08-14Use doxygen comment style for document entity such as struct, enum, variable ↵klu21-9/+9
that use /// but not // git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5649 6f19259b-4bc3-4df7-8a09-765794883524
2008-07-25Code Scrub for Protocol and Ppi Definitionlgao41-2/+19
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5564 6f19259b-4bc3-4df7-8a09-765794883524
2007-06-28Updated headers to follow coding standardAJFISH1-2/+0
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2815 6f19259b-4bc3-4df7-8a09-765794883524
2007-06-21Update Protocol for backward-compatible with EFI1.1.yshang11-3/+8
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2696 6f19259b-4bc3-4df7-8a09-765794883524
2007-06-19Checked in the Protocols introduced in UEFI/PI.yshang11-0/+94
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2674 6f19259b-4bc3-4df7-8a09-765794883524
2007-06-01Moved the MdePkg to OldMdePkg so that new code in MdePkg does not break ↵lhauch1-94/+0
existing builds. Also updated the SPD and FPD files UiNames git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2616 6f19259b-4bc3-4df7-8a09-765794883524
2006-04-22Initial import.bbahnsen1-0/+94
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3 6f19259b-4bc3-4df7-8a09-765794883524
generated by cgit v1.2.3 (git 2.39.0) at 2026-09-28 22:37:09 +0300