Tianocore/edk2.git/MdePkg/Include/Library/MemoryAllocationLib.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: 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: 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

Update MemoryAllocationLib.AllocateAlignedPages API comments for memory overflow ASSERT case.

2013-12-31T07:19:09+00:00

Signed-off-by: Liming Gao Reviewed-by: Star Zeng git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15033 6f19259b-4bc3-4df7-8a09-765794883524

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

Minor update the function interface for three re-allocate pool APIs to check the conformance of OldBuffer only when the memory allocation succeeds. In this way the assert condition is covered by CopyMem () API in BaseMemoryLib.

2009-05-12T02:29:22+00:00

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8296 6f19259b-4bc3-4df7-8a09-765794883524

Add conformance check for OldBuffer and size even if the memory allocation fails.

2009-05-11T08:23:26+00:00

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8294 6f19259b-4bc3-4df7-8a09-765794883524

Clarify that FreePages(), FreeAlignedPages(), and FreePool() may perform n actions if those operations are not possible. For example, the PEI Phase does not provide any services to free allocated pages or allocated pool memory.

2009-05-09T01:13:40+00:00

Update comments in PeiMemoryAllocationLib and UefiMemoryAllocationLib to match updates to MemoryAllocationLib.h. Add ASSERT() statements in PeiMemoryAllocationLib for the FreePages() and FreeAlignedPages() if Pages is 0. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8275 6f19259b-4bc3-4df7-8a09-765794883524

Comments have been checked with spec

2008-12-05T09:25:16+00:00

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6873 6f19259b-4bc3-4df7-8a09-765794883524