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<title>Tianocore/edk2.git/MdeModulePkg/Include/Guid/DebugMask.h, branch master</title>
<subtitle>EDK II (mirror)</subtitle>
<id>https://git.radix-linux.su/Tianocore/edk2.git/atom?h=master</id>
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<updated>2026-02-23T21:01:28+00:00</updated>
<entry>
<title>MdeModulePkg: Replace include guards with #pragma once</title>
<updated>2026-02-23T21:01:28+00:00</updated>
<author>
<name>Michael Kubacki</name>
<email>michael.kubacki@microsoft.com</email>
</author>
<published>2026-02-03T18:48:28+00:00</published>
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<id>urn:sha1:7a934d0befca7d10f361c76af6d2fcb6eb48c835</id>
<content type='text'>
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 &lt;michael.kubacki@microsoft.com&gt;
</content>
</entry>
<entry>
<title>MdeModulePkg: Apply uncrustify changes</title>
<updated>2021-12-07T17:24:28+00:00</updated>
<author>
<name>Michael Kubacki</name>
<email>michael.kubacki@microsoft.com</email>
</author>
<published>2021-12-05T22:54:02+00:00</published>
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<id>urn:sha1:1436aea4d5707e672672a11bda72be2c63c936c3</id>
<content type='text'>
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737

Apply uncrustify changes to .c/.h files in the MdeModulePkg package

Cc: Andrew Fish &lt;afish@apple.com&gt;
Cc: Leif Lindholm &lt;leif@nuviainc.com&gt;
Cc: Michael D Kinney &lt;michael.d.kinney@intel.com&gt;
Signed-off-by: Michael Kubacki &lt;michael.kubacki@microsoft.com&gt;
Reviewed-by: Liming Gao &lt;gaoliming@byosoft.com.cn&gt;
</content>
</entry>
<entry>
<title>MdeModulePkg: Replace BSD License with BSD+Patent License</title>
<updated>2019-04-09T17:58:08+00:00</updated>
<author>
<name>Michael D Kinney</name>
<email>michael.d.kinney@intel.com</email>
</author>
<published>2019-04-03T23:05:13+00:00</published>
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<id>urn:sha1:9d510e61fceee7b92955ef9a3c20343752d8ce3f</id>
<content type='text'>
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 &lt;michael.d.kinney@intel.com&gt;
Reviewed-by: Hao Wu &lt;hao.a.wu@intel.com&gt;
Reviewed-by: Jian J Wang &lt;jian.j.wang@intel.com&gt;
</content>
</entry>
<entry>
<title>MdeModulePkg: Clean up source files</title>
<updated>2018-06-28T03:19:45+00:00</updated>
<author>
<name>Liming Gao</name>
<email>liming.gao@intel.com</email>
</author>
<published>2018-06-27T13:08:52+00:00</published>
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<id>urn:sha1:d1102dba7210b95e41d06c2338a22ba6af248645</id>
<content type='text'>
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 &lt;liming.gao@intel.com&gt;
Reviewed-by: Star Zeng &lt;star.zeng@intel.com&gt;
</content>
</entry>
<entry>
<title>Add a GUIDed HOB to init Debug Print error level earlier in DXE. Add NULL PEIM library to init HOB.</title>
<updated>2011-10-08T21:00:13+00:00</updated>
<author>
<name>andrewfish</name>
<email>andrewfish@6f19259b-4bc3-4df7-8a09-765794883524</email>
</author>
<published>2011-10-08T21:00:13+00:00</published>
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<id>urn:sha1:d4a78455c6b0d9bd931ea459190e1de3beee70df</id>
<content type='text'>
Debug Print Error level can be controled by an EFI variable. Update the DXE version of the library to use a HOB if the variable services are not yet availilbe. This allows the variable to be used early in the DXE phase. 

approved-by: andrewfish
reviewed-by: lgao4



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12516 6f19259b-4bc3-4df7-8a09-765794883524
</content>
</entry>
<entry>
<title>Update DebugLib to provide support for "err" command in the EFI Shell to adjust the filter mask for DEBUG() messages.  The "err" command provide the ability to adjust this filter mask at a global level through an EFI Variable and at the module level through a the Debug Mask Protocol.  In order to support the degree of flexibility, the DebugLib needs to use library to abstract the get/set operations to the filter mask.</title>
<updated>2011-03-10T22:15:38+00:00</updated>
<author>
<name>mdkinney</name>
<email>mdkinney@6f19259b-4bc3-4df7-8a09-765794883524</email>
</author>
<published>2011-03-10T22:15:38+00:00</published>
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<id>urn:sha1:62a5bf63dd8837bf7afb55f5b72f6ef3152a250a</id>
<content type='text'>
1) Add DebugMask.h that defines the GUID and Protocol used by the "err" EFI Shell command to get/set the global mask and get/set the module scoped masks
2) Add DxeDebugPrintErrorLevelLib that provide an implementation of the DebugPrintErrorLevbel library classes that uses the GUID and Protocol defined in DebugMask.h to "err" EFI Shell compatibility.
3) Add default mapping for the DebugPrintErrirLevelLib to the DSC file for this package.




git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11366 6f19259b-4bc3-4df7-8a09-765794883524
</content>
</entry>
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