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NetBSD/include/stddef.h

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Fix typo in a comment
2020-03-01 18:18:34 +03:00
/* $NetBSD: stddef.h,v 1.22 2020/03/01 15:18:34 kamil Exp $ */
new RCS ID format.
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initial import of 386bsd-0.1 sources
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/*-
merge lite-2 sccs id, but as per jt, don't switch to using lite-2 rune_t's
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* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
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*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
Move UCB-licensed code from 4-clause to 3-clause licence. Patches provided by Joel Baker in PR 22270, verified by myself.
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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
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
merge lite-2 sccs id, but as per jt, don't switch to using lite-2 rune_t's
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* @(#)stddef.h 8.1 (Berkeley) 6/2/93
initial import of 386bsd-0.1 sources
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*/
#ifndef _STDDEF_H_
#define _STDDEF_H_
__offsetof__ is a builtin, so we need __GNU_PREREQ
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#include <sys/cdefs.h>
#include <sys/featuretest.h>
initial import of 386bsd-0.1 sources
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#include <machine/ansi.h>
Make ptrdiff_t available in the kernel.
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#ifdef _BSD_PTRDIFF_T_
add _BSD's to ansi types
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typedef _BSD_PTRDIFF_T_ ptrdiff_t;
Make ptrdiff_t available in the kernel.
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#undef _BSD_PTRDIFF_T_
#endif
initial import of 386bsd-0.1 sources
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add _BSD's to ansi types
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#ifdef _BSD_SIZE_T_
typedef _BSD_SIZE_T_ size_t;
#undef _BSD_SIZE_T_
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#endif
Don't define wchar_t for c++; it is native in the language. From Alexander Nasonov
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#if defined(_BSD_WCHAR_T_) && !defined(__cplusplus)
add _BSD's to ansi types
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typedef _BSD_WCHAR_T_ wchar_t;
#undef _BSD_WCHAR_T_
initial import of 386bsd-0.1 sources
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#endif
Move <null.h> to <sys/null.h> for the purpose of avoiding conflicts due to std C headers including it, and a kernel module written in C++ would benfit as well.
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#include <sys/null.h>
initial import of 386bsd-0.1 sources
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Use __GNUC_PREREQ__() for the GCC 4 test, too.
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#if __GNUC_PREREQ__(4, 0)
g++-4 does not like &0->member, so we have to use the built-in offsetof(). g++-3 does not have a built-in offsetof(), but we cannot use the c version, otherwise we break with -Wold-style-cast. Inspired by the DF version, but a bit different.
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#define offsetof(type, member) __builtin_offsetof(type, member)
#elif !defined(__cplusplus)
#define offsetof(type, member) ((size_t)(unsigned long)(&((type *)0)->member))
#else
__offsetof__ is a builtin, so we need __GNU_PREREQ
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#if !__GNUC_PREREQ__(3, 4)
gcc-3.3 does not have __offsetof__, but gcc-3.4 eems to require it: From the redhat web page: http://www.redhat.com/docs/manuals/enterprise/RHEL-4-Manual/gcc/offsetof.html __offsetof__ (expression) is equivalent to the parenthesized expression, except that the expression is considered an integral constant expression even if it contains certain operators that are not normally permitted in an integral constant expression. Users should never use __offsetof__ directly; the only valid use of __offsetof__ is to implement the offsetof macro in <stddef.h>.
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#define __offsetof__(a) a
#endif
#define offsetof(type, member) __offsetof__((reinterpret_cast<size_t> \
(&reinterpret_cast<const volatile char &>(static_cast<type *>(0)->member))))
g++-4 does not like &0->member, so we have to use the built-in offsetof(). g++-3 does not have a built-in offsetof(), but we cannot use the c version, otherwise we break with -Wold-style-cast. Inspired by the DF version, but a bit different.
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#endif
add max_align_t. C11 defines this and GCC 5.3 really wants it. XXX: language laywers, please feel free to fix this as necessary.
2016-03-17 03:03:38 +03:00
Expose max_align_t to C99/C++ max_align_t does not depend on any pre-C99 or !C++ language feature. This structure is in use in 3rd party essential C++ code as an extension for older language revisions and in gnu99 code in the NetBSD distribution (RTLD's build rules define -std=gnu11 just for exposing this struct). Exposing max_align_t from the central NetBSD header avoid duplicate definition in 3rd party code that could differ and produce ABI mismatched binaries between -std= revisions. This problem does not exist on OSs like Linux as they get this namespace visibility defined inside LLVM or GNU toolchain headers. NetBSD ships with its own stddef.h, rather than relying on a toolchain and its internal extensions.
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#if (__STDC_VERSION__ - 0) > 199901L || defined(__cplusplus)
Fix typo in a comment
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/* Introduced in C11/C++11, as an extension exposed to C99/C++98 */
add max_align_t. C11 defines this and GCC 5.3 really wants it. XXX: language laywers, please feel free to fix this as necessary.
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typedef union {
PR/50983: David Shao: Protect stddef; also make the pointer void *.
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void *_v;
add max_align_t. C11 defines this and GCC 5.3 really wants it. XXX: language laywers, please feel free to fix this as necessary.
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long double _ld;
long long int _ll;
} max_align_t;
PR/50983: David Shao: Protect stddef; also make the pointer void *.
2016-03-20 17:11:49 +03:00
#endif
g++-4 does not like &0->member, so we have to use the built-in offsetof(). g++-3 does not have a built-in offsetof(), but we cannot use the c version, otherwise we break with -Wold-style-cast. Inspired by the DF version, but a bit different.
2006-08-21 19:02:23 +04:00
initial import of 386bsd-0.1 sources
1993-03-21 12:45:37 +03:00
#endif /* _STDDEF_H_ */