Tianocore/edk2.git/MdePkg/Include/Library/BaseMemoryLib.h, branch master

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: 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

MdePkg: Clean up source files

2018-06-28T03:19:47+00:00

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

MdePkg BaseMemoryLib: Add C implementation of API IsZeroBuffer()

2016-08-22T10:54:30+00:00

Add the implementation of API IsZeroBuffer() via C language for the following library instances: BaseMemoryLib PeiMemoryLib UefiMemoryLib Cc: Michael D Kinney Cc: Liming Gao Cc: Jiewen Yao Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Hao Wu Reviewed-by: Liming Gao

MdePkg BaseMemoryLib: Add implementation of API IsZeroGuid()

2016-08-22T10:54:29+00:00

Cc: Michael D Kinney Cc: Liming Gao Cc: Jiewen Yao Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Hao Wu Reviewed-by: Liming Gao

Update the copyright notice format

2010-04-23T15:46:20+00:00

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10403 6f19259b-4bc3-4df7-8a09-765794883524

Grammatical and disclaimer changes (does not follow internal C coding stds.)

2010-03-12T22:19:12+00:00

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10235 6f19259b-4bc3-4df7-8a09-765794883524

Add SetMemN() and ScanMemN() to the BaseMemoryLib class and all BaseMemoryLib implementations

2009-12-05T18:48:52+00:00

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9517 6f19259b-4bc3-4df7-8a09-765794883524

Synchronize function comment in MdePkg\Library\BaseMemoryLib.h,CacheMaintenanceLib.h with the c file instance of this functions.

2008-11-25T07:25:14+00:00

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6721 6f19259b-4bc3-4df7-8a09-765794883524

Synchronize the MdePkg\Include\Library\BaseMemoryLib.h,

2008-11-19T10:00:35+00:00

CacheMaintenance.h,CpuLib.h,DebugLib.h,DevicePathLib.h with the MDE_Library_Spec. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6629 6f19259b-4bc3-4df7-8a09-765794883524