src/systemd/_sd-common.h

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