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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>
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REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737
Apply uncrustify changes to .c/.h files in the FmpDevicePkg 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>
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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>
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Cc: Michael D Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
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https://bugzilla.tianocore.org/show_bug.cgi?id=922
Based on content from the following branch:
https://github.com/Microsoft/MS_UEFI/tree/share/MsCapsuleSupport/MsCapsuleUpdatePkg
Create FmpDevicePkg with library classes and PCDs used to
customize the behavior of a Firmware Management Protocol
instance.
Library Classes
===============
* FmpDeviceLib - Provides firmware device specific services
to support updates of a firmware image stored in a firmware
device.
* CapsuleUpdatePolicyLib - Provides platform policy services
used during a capsule update.
* FmpPayloadHeaderLib - Provides services to retrieve values
from a capsule's FMP Payload Header. The structure is not
included in the library class. Instead, services are
provided to retrieve information from the FMP Payload Header.
If information is added to the FMP Payload Header, then new
services may be added to this library class to retrieve the
new information.
PCDs set per module
====================
* PcdFmpDeviceSystemResetRequired - Indicates if a full
system reset is required before a firmware update to a
firmware devices takes effect
* PcdFmpDeviceTestKeySha256Digest - The SHA-256 hash of a
PKCS7 test key that is used to detect if a test key is
being used to authenticate capsules. Test key detection
is disabled by setting the value to {0}.
* PcdFmpDeviceProgressColor - The color of the progress bar
during a firmware update.
* PcdFmpDeviceImageIdName - The Null-terminated Unicode
string used to fill in the ImageIdName field of the
EFI_FIRMWARE_IMAGE_DESCRIPTOR structure that is returned
by the GetImageInfo() service of the Firmware Management
Protocol for the firmware device.
* PcdFmpDeviceBuildTimeLowestSupportedVersion - The build
time value used to fill in the LowestSupportedVersion field
of the EFI_FIRMWARE_IMAGE_DESCRIPTOR structure that is
returned by the GetImageInfo() service of the Firmware
Management Protocol.
* PcdFmpDeviceProgressWatchdogTimeInSeconds - The time in
seconds to arm a watchdog timer during the update of a
firmware device.
PCDs set per module or for entire platform
==========================================
* PcdFmpDevicePkcs7CertBufferXdr - One or more PKCS7
certificates used to verify a firmware device capsule
update image.
* PcdFmpDeviceLockEventGuid - An event GUID that locks
the firmware device when the event is signaled.
Cc: Sean Brogan <sean.brogan@microsoft.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
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