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dbab6577c6
The macros defined by <sys/sysmacros.h> are not part of POSIX nor XSI, and their names frequently collide with user code; see for instance glibc bug 19239 and Red Hat bug 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the problem. * NEWS: Inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. * misc/sys/sysmacros.h: If __SYSMACROS_DEPRECATED_INCLUSION is defined, define major, minor, and makedev to issue deprecation warnings on use. If __SYSMACROS_DEPRECATED_INCLUSION is *not* defined, suppress previously-activated deprecation warnings for these macros and prevent subsequent inclusions of this header from having any effect. * posix/sys/types.h: Define __SYSMACROS_DEPRECATED_INCLUSION before including <sys/sysmacros.h>, and undefine it again afterward.
121 lines
4.3 KiB
C
121 lines
4.3 KiB
C
/* Definitions of macros to access `dev_t' values.
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Copyright (C) 1996-2015 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _SYS_SYSMACROS_H_OUTER
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#ifndef __SYSMACROS_DEPRECATED_INCLUSION
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# define _SYS_SYSMACROS_H_OUTER 1
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#endif
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/* If <sys/sysmacros.h> is included after <sys/types.h>, these macros
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will already be defined, and we need to redefine them without the
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deprecation warnings. (If they are included in the opposite order,
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the outer #ifndef will suppress this entire file and the macros
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will be usable without warnings.) */
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#undef major
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#undef minor
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#undef makedev
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/* This is the macro that must be defined to satisfy the misuse check
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in bits/sysmacros.h. */
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#ifndef _SYS_SYSMACROS_H
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#define _SYS_SYSMACROS_H 1
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#include <features.h>
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#include <bits/types.h>
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#include <bits/sysmacros.h>
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/* The extra "\n " moves gcc's [-Wdeprecated-declarations] annotation
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onto the next line. */
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#define __SYSMACROS_DEPRECATION_MSG(symbol) \
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"\n In the GNU C Library, `" #symbol "' is defined by <sys/sysmacros.h>." \
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"\n For historical compatibility, it is currently defined by" \
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"\n <sys/types.h> as well, but we plan to remove this soon." \
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"\n To use `" #symbol "', include <sys/sysmacros.h> directly." \
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"\n If you did not intend to use a system-defined macro `" #symbol "'," \
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"\n you should #undef it after including <sys/types.h>." \
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"\n "
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#define __SYSMACROS_DECL_TEMPL(rtype, name, proto) \
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extern rtype gnu_dev_##name proto __THROW __attribute_const__;
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#define __SYSMACROS_FST_DECL_TEMPL(rtype, name, proto) \
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extern rtype __REDIRECT_NTH (__##name##_from_sys_types, proto, \
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gnu_dev_##name) \
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__attribute_const__ \
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__attribute_deprecated_msg__ (__SYSMACROS_DEPRECATION_MSG (name));
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#define __SYSMACROS_IMPL_TEMPL(rtype, name, proto) \
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__extension__ __extern_inline __attribute_const__ rtype \
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__NTH (gnu_dev_##name proto)
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#define __SYSMACROS_FST_IMPL_TEMPL(rtype, name, proto) \
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__extension__ __extern_inline __attribute_const__ rtype \
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__NTH (__##name##_from_sys_types proto)
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__BEGIN_DECLS
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__SYSMACROS_DECLARE_MAJOR (__SYSMACROS_DECL_TEMPL)
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__SYSMACROS_DECLARE_MINOR (__SYSMACROS_DECL_TEMPL)
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__SYSMACROS_DECLARE_MAKEDEV (__SYSMACROS_DECL_TEMPL)
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__SYSMACROS_DECLARE_MAJOR (__SYSMACROS_FST_DECL_TEMPL)
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__SYSMACROS_DECLARE_MINOR (__SYSMACROS_FST_DECL_TEMPL)
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__SYSMACROS_DECLARE_MAKEDEV (__SYSMACROS_FST_DECL_TEMPL)
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#ifdef __USE_EXTERN_INLINES
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__SYSMACROS_DEFINE_MAJOR (__SYSMACROS_IMPL_TEMPL)
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__SYSMACROS_DEFINE_MINOR (__SYSMACROS_IMPL_TEMPL)
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__SYSMACROS_DEFINE_MAKEDEV (__SYSMACROS_IMPL_TEMPL)
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__SYSMACROS_DEFINE_MAJOR (__SYSMACROS_FST_IMPL_TEMPL)
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__SYSMACROS_DEFINE_MINOR (__SYSMACROS_FST_IMPL_TEMPL)
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__SYSMACROS_DEFINE_MAKEDEV (__SYSMACROS_FST_IMPL_TEMPL)
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#endif
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__END_DECLS
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#endif /* _SYS_SYSMACROS_H */
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#ifndef __SYSMACROS_NEED_IMPLEMENTATION
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# undef __SYSMACROS_DECL_TEMPL
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# undef __SYSMACROS_FST_DECL_TEMPL
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# undef __SYSMACROS_IMPL_TEMPL
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# undef __SYSMACROS_FST_IMPL_TEMPL
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# undef __SYSMACROS_DECLARE_MAJOR
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# undef __SYSMACROS_DECLARE_MINOR
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# undef __SYSMACROS_DECLARE_MAKEDEV
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# undef __SYSMACROS_DEFINE_MAJOR
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# undef __SYSMACROS_DEFINE_MINOR
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# undef __SYSMACROS_DEFINE_MAKEDEV
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#endif
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#ifdef __SYSMACROS_DEPRECATED_INCLUSION
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# define major(dev) __major_from_sys_types (dev)
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# define minor(dev) __minor_from_sys_types (dev)
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# define makedev(maj, min) __makedev_from_sys_types (maj, min)
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#else
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# define major(dev) gnu_dev_major (dev)
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# define minor(dev) gnu_dev_minor (dev)
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# define makedev(maj, min) gnu_dev_makedev (maj, min)
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#endif
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#endif /* sys/sysmacros.h */
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