src/systemd/_sd-common.h

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