src/systemd/_sd-common.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #ifndef foosdcommonhfoo
   3 #define foosdcommonhfoo
   4
   5 /***
   6   Copyright 2013 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 /* This is a private header; never even think of including this directly! */
  23
  24 #if defined(__INCLUDE_LEVEL__) && __INCLUDE_LEVEL__ <= 1
  25 #  error "Do not include _sd-common.h directly; it is a private header."
  26 #endif
  27
  28 #ifndef _sd_printf_
  29 #  if __GNUC__ >= 4
  30 #    define _sd_printf_(a,b) __attribute__ ((format (printf, a, b)))
  31 #  else
  32 #    define _sd_printf_(a,b)
  33 #  endif
  34 #endif
  35
  36 #ifndef _sd_sentinel_
  37 #  define _sd_sentinel_ __attribute__((sentinel))
  38 #endif
  39
  40 #ifndef _sd_packed_
  41 #  define _sd_packed_ __attribute__((packed))
  42 #endif
  43
  44 #ifndef _sd_pure_
  45 #  define _sd_pure_ __attribute__((pure))
  46 #endif
  47
  48 #ifndef _SD_STRINGIFY
  49 #  define _SD_XSTRINGIFY(x) #x
  50 #  define _SD_STRINGIFY(x) _SD_XSTRINGIFY(x)
  51 #endif
  52
  53 #ifndef _SD_BEGIN_DECLARATIONS
  54 #  ifdef __cplusplus
  55 #    define _SD_BEGIN_DECLARATIONS                              \
  56         extern "C" {                                            \
  57         struct _sd_useless_struct_to_allow_trailing_semicolon_
  58 #  else
  59 #    define _SD_BEGIN_DECLARATIONS                              \
  60         struct _sd_useless_struct_to_allow_trailing_semicolon_
  61 #  endif
  62 #endif
  63
  64 #ifndef _SD_END_DECLARATIONS
  65 #  ifdef __cplusplus
  66 #    define _SD_END_DECLARATIONS                                \
  67         }                                                       \
  68         struct _sd_useless_cpp_struct_to_allow_trailing_semicolon_
  69 #  else
  70 #    define _SD_END_DECLARATIONS                                \
  71         struct _sd_useless_struct_to_allow_trailing_semicolon_
  72 #  endif
  73 #endif
  74
  75 #define _SD_DEFINE_POINTER_CLEANUP_FUNC(type, func)             \
  76         static __inline__ void func##p(type **p) {              \
  77                 if (*p)                                         \
  78                         func(*p);                               \
  79         }                                                       \
  80         struct _sd_useless_struct_to_allow_trailing_semicolon_
  81
  82 #endif