misc/sys/sysmacros.h

   1 /* Definitions of macros to access `dev_t' values.
   2    Copyright (C) 1996-2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _SYS_SYSMACROS_H
  20 #define _SYS_SYSMACROS_H 1
  21
  22 #include <features.h>
  23 #include <bits/types.h>
  24 #include <bits/sysmacros.h>
  25
  26 #define __SYSMACROS_DECL_TEMPL(rtype, name, proto)                           \
  27   extern rtype gnu_dev_##name proto __THROW __attribute_const__;
  28
  29 #define __SYSMACROS_IMPL_TEMPL(rtype, name, proto)                           \
  30   __extension__ __extern_inline __attribute_const__ rtype                    \
  31   __NTH (gnu_dev_##name proto)
  32
  33 __BEGIN_DECLS
  34
  35 __SYSMACROS_DECLARE_MAJOR (__SYSMACROS_DECL_TEMPL)
  36 __SYSMACROS_DECLARE_MINOR (__SYSMACROS_DECL_TEMPL)
  37 __SYSMACROS_DECLARE_MAKEDEV (__SYSMACROS_DECL_TEMPL)
  38
  39 #ifdef __USE_EXTERN_INLINES
  40
  41 __SYSMACROS_DEFINE_MAJOR (__SYSMACROS_IMPL_TEMPL)
  42 __SYSMACROS_DEFINE_MINOR (__SYSMACROS_IMPL_TEMPL)
  43 __SYSMACROS_DEFINE_MAKEDEV (__SYSMACROS_IMPL_TEMPL)
  44
  45 #endif
  46
  47 __END_DECLS
  48
  49 #ifndef __SYSMACROS_NEED_IMPLEMENTATION
  50 # undef __SYSMACROS_DECL_TEMPL
  51 # undef __SYSMACROS_IMPL_TEMPL
  52 # undef __SYSMACROS_DECLARE_MAJOR
  53 # undef __SYSMACROS_DECLARE_MINOR
  54 # undef __SYSMACROS_DECLARE_MAKEDEV
  55 # undef __SYSMACROS_DEFINE_MAJOR
  56 # undef __SYSMACROS_DEFINE_MINOR
  57 # undef __SYSMACROS_DEFINE_MAKEDEV
  58 #endif
  59
  60 #define major(dev) gnu_dev_major (dev)
  61 #define minor(dev) gnu_dev_minor (dev)
  62 #define makedev(maj, min) gnu_dev_makedev (maj, min)
  63
  64 #endif /* sys/sysmacros.h */