Tianocore/edk2.git/MdePkg/Include/Library/CcProbeLib.h, branch masterEDK II (mirror)https://git.radix-linux.su/Tianocore/edk2.git/atom?h=master2026-05-08T02:15:34+00:00MdePkg: Fix Spelling Errors in Comments2026-05-08T02:15:34+00:00Oliver Smith-Dennyosde@microsoft.com2026-04-16T16:52:54+00:00urn:sha1:6f73fbea977818342dd3992aa443f867957ad1c4
This fixes all non-breaking spelling errors in
MdePkg.
Signed-off-by: Oliver Smith-Denny <osde@microsoft.com>
MdePkg: Replace include guards with #pragma once2026-02-23T21:01:28+00:00Michael Kubackimichael.kubacki@microsoft.com2026-02-03T18:54:32+00:00urn:sha1:7835e5802a2a70984333c054002e449bfd1f0a0d
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>
MdePkg: Add CcProbeLibNull2022-04-19T01:26:08+00:00Min Xumin.m.xu@intel.com2022-04-19T00:26:24+00:00urn:sha1:74a3eb975da7059b825c84bed759d2845de8de68
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3902
CcProbeLib is used to probe the Confidential Computing guest type.
This library is designed to run on SEC / PEI / DXE phases. A null
instance of the library always returns CCGuestTypeNonEncrypted.
A platform specific CcProbeLib will be implemented, for example,
in OvmfPkg.
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>