src/systemd/_sd-common.h

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