src/systemd/_sd-common.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #ifndef foosdcommonhfoo
   3 #define foosdcommonhfoo
   4
   5 /***
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 /* This is a private header; never even think of including this directly! */
  21
  22 #if defined(__INCLUDE_LEVEL__) && __INCLUDE_LEVEL__ <= 1
  23 #  error "Do not include _sd-common.h directly; it is a private header."
  24 #endif
  25
  26 #ifndef _sd_printf_
  27 #  if __GNUC__ >= 4
  28 #    define _sd_printf_(a,b) __attribute__ ((format (printf, a, b)))
  29 #  else
  30 #    define _sd_printf_(a,b)
  31 #  endif
  32 #endif
  33
  34 #ifndef _sd_sentinel_
  35 #  define _sd_sentinel_ __attribute__((sentinel))
  36 #endif
  37
  38 #ifndef _sd_packed_
  39 #  define _sd_packed_ __attribute__((packed))
  40 #endif
  41
  42 #ifndef _sd_pure_
  43 #  define _sd_pure_ __attribute__((pure))
  44 #endif
  45
  46 #ifndef _SD_STRINGIFY
  47 #  define _SD_XSTRINGIFY(x) #x
  48 #  define _SD_STRINGIFY(x) _SD_XSTRINGIFY(x)
  49 #endif
  50
  51 #ifndef _SD_BEGIN_DECLARATIONS
  52 #  ifdef __cplusplus
  53 #    define _SD_BEGIN_DECLARATIONS                              \
  54         extern "C" {                                            \
  55         struct _sd_useless_struct_to_allow_trailing_semicolon_
  56 #  else
  57 #    define _SD_BEGIN_DECLARATIONS                              \
  58         struct _sd_useless_struct_to_allow_trailing_semicolon_
  59 #  endif
  60 #endif
  61
  62 #ifndef _SD_END_DECLARATIONS
  63 #  ifdef __cplusplus
  64 #    define _SD_END_DECLARATIONS                                \
  65         }                                                       \
  66         struct _sd_useless_cpp_struct_to_allow_trailing_semicolon_
  67 #  else
  68 #    define _SD_END_DECLARATIONS                                \
  69         struct _sd_useless_struct_to_allow_trailing_semicolon_
  70 #  endif
  71 #endif
  72
  73 #define _SD_DEFINE_POINTER_CLEANUP_FUNC(type, func)             \
  74         static __inline__ void func##p(type **p) {              \
  75                 if (*p)                                         \
  76                         func(*p);                               \
  77         }                                                       \
  78         struct _sd_useless_struct_to_allow_trailing_semicolon_
  79
  80 #endif