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https://github.com/tianocore/edk2
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8472271dae
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>
93 lines
2 KiB
C
93 lines
2 KiB
C
/** @file
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Declares statusbar interface functions.
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Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved. <BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#pragma once
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/**
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Initialization function for Status Bar.
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@retval EFI_SUCCESS The operation was successful.
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@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
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@sa StatusBarSetStatusString
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**/
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EFI_STATUS
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StatusBarInit (
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VOID
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);
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/**
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Cleanup function for the status bar.
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**/
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VOID
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StatusBarCleanup (
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VOID
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);
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/**
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Cause the status bar to refresh it's printing on the screen.
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@param[in] EditorFirst TRUE to indicate the first launch of the editor.
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FALSE otherwise.
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@param[in] LastRow LastPrintable row.
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@param[in] LastCol Last printable column.
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@param[in] FileRow Row in the file.
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@param[in] FileCol Column in the file.
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@param[in] InsertMode TRUE to indicate InsertMode. FALSE otherwise.
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@retval EFI_SUCCESS The operation was successful.
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**/
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EFI_STATUS
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StatusBarRefresh (
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IN BOOLEAN EditorFirst,
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IN UINTN LastRow,
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IN UINTN LastCol,
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IN UINTN FileRow,
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IN UINTN FileCol,
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IN BOOLEAN InsertMode
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);
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/**
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Set the status string text part.
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@param[in] Str The string to use.
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@retval EFI_SUCCESS The operation was successful.
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@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
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**/
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EFI_STATUS
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StatusBarSetStatusString (
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IN CHAR16 *Str
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);
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/**
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Function to retrieve the current status string.
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@return The string that is used.
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**/
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CONST CHAR16 *
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StatusBarGetString (
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VOID
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);
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/**
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Function to set the need refresh boolean to TRUE.
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**/
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VOID
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StatusBarSetRefresh (
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VOID
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);
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/**
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Function to get the need refresh boolean to TRUE.
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@retval TRUE The status bar needs to be refreshed.
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**/
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BOOLEAN
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StatusBarGetRefresh (
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VOID
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);
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