mirror of https://github.com/acidanthera/audk.git
377 lines
14 KiB
C
377 lines
14 KiB
C
/** @file
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Common declarations and definitions for Standard C Library headers.
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This header consolidates definitions and declarations for compiler specific
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features in one place in order to assist in making the remainder of the
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library as compiler independent as possible.
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Certain macro and type definitions are required to be provided by several
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different headers. In order to avoid having multiple definitions, and the
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attendant risk of having the definitions get out of sync, they are defined in
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this header.
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Note that MdePkg/Include/Base.h is automatically included and will bring
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processor architecture specific definitions along with it.
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Throughout the library, the following macros are used instead of keywords so
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that the library can be easily tuned for different compilers.
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__inline Defined to the appropriate keyword or not defined.
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__func__ Defined to __FUNC__, __FUNCTION__, or NULL as appropriate.
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__restrict Defined to nothing for VC++ or to restrict for GCC and C99 compliant compilers.
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This file and its contents are inspired by the <sys/cdefs.h> files in Berkeley
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Unix. They have been re-implemented to be specific to the EFI environment.
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Copyright (c) 2010 - 2012, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available under
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the terms and conditions of the BSD License that accompanies this distribution.
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The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Portions Copyright (c) 1991, 1993
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The Regents of the University of California. All rights reserved.
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Portions of this code are derived from software contributed to Berkeley by
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Berkeley Software Design, Inc.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the University nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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**/
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#ifndef _EFI_CDEFS_H
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#define _EFI_CDEFS_H
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/*
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* Macro to test if we're using a GNU C compiler of a specific vintage
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* or later, for e.g. features that appeared in a particular version
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* of GNU C. Usage:
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*
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* #if __GNUC_PREREQ__(major, minor)
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* ...cool feature...
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* #else
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* ...delete feature...
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* #endif
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*/
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#ifdef __GNUC__
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#define __GNUC_PREREQ__(x, y) \
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((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \
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(__GNUC__ > (x)))
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#define DONT_USE_STRONG_WEAK_ALIAS 1
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#else
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#define __GNUC_PREREQ__(x, y) 0
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#endif
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#include <sys/featuretest.h>
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//#include <machine/_EfiCdefs.h>
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#ifdef __PE32__
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#include <sys/_EfiCdefs_PE32.h>
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#else
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#include <sys/cdefs_aout.h>
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#endif
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/* NULL is defined by the automatic inclusion of Base.h by the build tools. */
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#ifdef __GNUC__
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#define _EFI_SIZE_T_ __SIZE_TYPE__ /* sizeof() */
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#define _EFI_WCHAR_T __WCHAR_TYPE__
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#define _EFI_WINT_T __WINT_TYPE__
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//#define _EFI_WINT_MIN (0)
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//#define _EFI_WINT_MAX (0xFFFF)
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#define _EFI_PTRDIFF_T_ __PTRDIFF_TYPE__ /* ptr1 - ptr2 --- Must be same size as size_t */
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#else
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#define _EFI_SIZE_T_ UINTN /* sizeof() */
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#define _EFI_WCHAR_T UINT16
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#define _EFI_WINT_T INT32
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//#define _EFI_WINT_MIN (-2147483647) /* wint_t */
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//#define _EFI_WINT_MAX ( 2147483647) /* wint_t */
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#define _EFI_PTRDIFF_T_ INTN /* ptr1 - ptr2 --- Must be same size as size_t */
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#endif /* __GNUC__ */
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#define _EFI_CLOCK_T UINT64
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#define _EFI_TIME_T INT32
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#if defined(__cplusplus)
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#define __BEGIN_DECLS extern "C" {
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#define __END_DECLS }
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#define __static_cast(x,y) static_cast<x>(y)
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#else
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#define __BEGIN_DECLS
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#define __END_DECLS
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#define __static_cast(x,y) (x)y
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#endif
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/*
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* The __CONCAT macro is used to concatenate parts of symbol names, e.g.
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* with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
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* The __CONCAT macro is a bit tricky -- make sure you don't put spaces
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* in between its arguments. __CONCAT can also concatenate double-quoted
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* strings produced by the __STRING macro, but this only works with ANSI C.
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*/
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#define ___STRING(x) __STRING(x)
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#define ___CONCAT(x,y) __CONCAT(x,y)
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#define __CONCAT(x,y) x ## y
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#define __STRING(x) #x
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#define __const CONST
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#define __signed signed
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#define __volatile volatile
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#if __STDC__ || defined(__cplusplus)
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#if defined(__cplusplus)
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#define __inline inline /* convert to C++ keyword */
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#else
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#if defined(_MSC_VER) || (!defined(__GNUC__) && !defined(__lint__))
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#define __inline /* delete C99 keyword */
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#endif /* !__GNUC__ && !__lint__ */
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#endif /* !__cplusplus */
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#endif /* !(__STDC__ || __cplusplus) */
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/* Used in NetBSD for internal auditing of the source tree. */
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#define __aconst
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/*
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* The following macro is used to remove const cast-away warnings
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* from gcc -Wcast-qual; it should be used with caution because it
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* can hide valid errors; in particular most valid uses are in
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* situations where the API requires it, not to cast away string
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* constants. We don't use *intptr_t on purpose here and we are
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* explicit about unsigned long so that we don't have additional
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* dependencies.
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*/
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#define __UNCONST(a) ((void *)(a))
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//#define __UNCONST(a) ((void *)(PHYSICAL_ADDRESS)(const void *)(a))
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/*
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* The following macro is used to remove the volatile cast-away warnings
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* from gcc -Wcast-qual; as above it should be used with caution
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* because it can hide valid errors or warnings. Valid uses include
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* making it possible to pass a volatile pointer to memset().
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* For the same reasons as above, we use unsigned long and not intptr_t.
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*/
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#define __UNVOLATILE(a) ((void *)(PHYSICAL_ADDRESS)(volatile void *)(a))
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/*
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* GCC2 provides __extension__ to suppress warnings for various GNU C
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* language extensions under "-ansi -pedantic".
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*/
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#if !__GNUC_PREREQ__(2, 0)
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#define __extension__ /* delete __extension__ if non-gcc or gcc1 */
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#endif
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/*
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* GCC1 and some versions of GCC2 declare dead (non-returning) and
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* pure (no side effects) functions using "volatile" and "const";
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* unfortunately, these then cause warnings under "-ansi -pedantic".
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* GCC2 uses a new, peculiar __attribute__((attrs)) style. All of
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* these work for GNU C++ (modulo a slight glitch in the C++ grammar
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* in the distribution version of 2.5.5).
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*/
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#if !__GNUC_PREREQ__(2, 5)
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#define __attribute__(x) /* delete __attribute__ if non-gcc or gcc1 */
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#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
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#define __dead __volatile
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#define __pure __const
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#endif
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#endif
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/* Delete pseudo-keywords wherever they are not available or needed. */
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#ifndef __dead
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#define __dead
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#define __pure
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#endif
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#if __GNUC_PREREQ__(2, 7)
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#define __unused __attribute__((__unused__))
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#define __noreturn __attribute__((__noreturn__))
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#else
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#define __unused /* delete */
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#define __noreturn /* delete */
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#endif
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#if __GNUC_PREREQ__(3, 1)
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#define __used __attribute__((__used__))
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#else
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#define __used __unused
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#endif
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#if __GNUC_PREREQ__(2, 7)
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#define __packed __attribute__((__packed__))
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#define __aligned(x) __attribute__((__aligned__(x)))
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#define __section(x) __attribute__((__section__(x)))
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#elif defined(__lint__)
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#define __packed /* delete */
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#define __aligned(x) /* delete */
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#define __section(x) /* delete */
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#else
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#define __packed error: no __packed for this compiler
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#define __aligned(x) error: no __aligned for this compiler
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#define __section(x) error: no __section for this compiler
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#endif
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/*
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* C99 defines the restrict type qualifier keyword, which was made available
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* in GCC 2.92.
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*/
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#if __STDC_VERSION__ >= 199901L
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#define __restrict restrict
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#else
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#if defined(_MSC_VER) || !__GNUC_PREREQ__(2, 92)
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#define __restrict /* delete __restrict when not supported */
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#endif
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#endif
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/*
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* C99 defines __func__ predefined identifier, which was made available
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* in GCC 2.95.
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*/
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#if !(__STDC_VERSION__ >= 199901L)
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#if defined(_MSC_VER)
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#define __func__ __FUNCTION__ /* Use the MS-specific predefined macro */
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#elif __GNUC_PREREQ__(2, 6)
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#define __func__ __PRETTY_FUNCTION__
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#elif __GNUC_PREREQ__(2, 4)
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#define __func__ __FUNCTION__
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#else
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#define __func__ ""
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#endif
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#endif /* !(__STDC_VERSION__ >= 199901L) */
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#define __RENAME(x)
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/*
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* A barrier to stop the optimizer from moving code or assume live
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* register values. This is gcc specific, the version is more or less
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* arbitrary, might work with older compilers.
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*/
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#if __GNUC_PREREQ__(2, 95)
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#define __insn_barrier() __asm __volatile("":::"memory")
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#else
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#define __insn_barrier() /* */
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#endif
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/*
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* GNU C version 2.96 adds explicit branch prediction so that
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* the CPU back-end can hint the processor and also so that
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* code blocks can be reordered such that the predicted path
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* sees a more linear flow, thus improving cache behavior, etc.
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*
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* The following two macros provide us with a way to use this
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* compiler feature. Use __predict_true() if you expect the expression
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* to evaluate to true, and __predict_false() if you expect the
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* expression to evaluate to false.
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*
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* A few notes about usage:
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*
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* * Generally, __predict_false() error condition checks (unless
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* you have some _strong_ reason to do otherwise, in which case
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* document it), and/or __predict_true() `no-error' condition
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* checks, assuming you want to optimize for the no-error case.
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*
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* * Other than that, if you don't know the likelihood of a test
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* succeeding from empirical or other `hard' evidence, don't
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* make predictions.
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*
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* * These are meant to be used in places that are run `a lot'.
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* It is wasteful to make predictions in code that is run
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* seldomly (e.g. at subsystem initialization time) as the
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* basic block reordering that this affects can often generate
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* larger code.
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*/
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#if __GNUC_PREREQ__(2, 96)
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#define __predict_true(exp) __builtin_expect((exp) != 0, 1)
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#define __predict_false(exp) __builtin_expect((exp) != 0, 0)
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#else
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#define __predict_true(exp) (exp)
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#define __predict_false(exp) (exp)
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#endif
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/* find least significant bit that is set */
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#define __LOWEST_SET_BIT(__mask) ((((__mask) - 1) & (__mask)) ^ (__mask))
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#define __SHIFTOUT(__x, __mask) (((__x) & (__mask)) / __LOWEST_SET_BIT(__mask))
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#define __SHIFTIN(__x, __mask) ((__x) * __LOWEST_SET_BIT(__mask))
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#define __SHIFTOUT_MASK(__mask) __SHIFTOUT((__mask), (__mask))
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#if defined(_MSC_VER) /* Handle Microsoft VC++ compiler specifics. */
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/* VC++, by default, defines wchar_t as an intrinsic type, equivalent to
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unsigned short. This conflicts which Standard C Library
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implementations which try to define wchar_t.
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Make sure that this behavior has been turned off by using
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/Zc:wchar_t- on the command line.
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*/
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#ifdef _NATIVE_WCHAR_T_DEFINED
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#error You must specify /Zc:wchar_t- to the compiler to turn off intrinsic wchar_t.
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#endif
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/* Get rid of pre-defined macros that are misleading in this environment. */
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#undef _WIN32
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#undef _WIN64
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// Keep compiler quiet about casting from smaller to larger types
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#pragma warning ( disable : 4306 )
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#define __STDC__ 1
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#define __STDC_VERSION__ 199409L
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#define __STDC_HOSTED__ 1
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#endif /* defined(_MSC_VER) */
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extern int _fltused; // VC++ requires this if you use floating point. KEEP for all compilers.
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#define _Bool BOOLEAN
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#define _DIAGASSERT(e)
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// Types used to replace long so that it will have constant length regardless of compiler.
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typedef INT32 LONG32;
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typedef UINT32 ULONG32;
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typedef INT64 LONG64;
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typedef UINT64 ULONG64;
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typedef INTN EFI_LONG_T;
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typedef UINTN EFI_ULONG_T;
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/* These types reflect the compiler's size for long */
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#if defined(__GNUC__)
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#if __GNUC_PREREQ__(4,4)
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/* GCC 4.4 or later */
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typedef INT64 LONGN;
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typedef UINT64 ULONGN;
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#else
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/* minGW gcc variant */
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typedef INT32 LONGN;
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typedef UINT32 ULONGN;
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#endif /* __GNUC_PREREQ__(4,4) */
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#else /* NOT GCC */
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/* Microsoft or Intel compilers */
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typedef INT32 LONGN;
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typedef UINT32 ULONGN;
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#endif /* defined(__GNUC__) */
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#endif /* _EFI_CDEFS_H */
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