23 #if !defined (DBUS_INSIDE_DBUS_H) && !defined (DBUS_COMPILATION)    24 #error "Only <dbus/dbus.h> can be included directly, this file may disappear or change contents."    31 #  define DBUS_BEGIN_DECLS  extern "C" {    32 #  define DBUS_END_DECLS    }    34 #  define DBUS_BEGIN_DECLS    35 #  define DBUS_END_DECLS    49 #    define NULL        ((void*) 0)    53 #if  __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)    54 #  define DBUS_DEPRECATED __attribute__ ((__deprecated__))    55 #elif defined(_MSC_VER) && (_MSC_VER >= 1300)    56 #  define DBUS_DEPRECATED __declspec(deprecated)    58 #  define DBUS_DEPRECATED    61 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)    62 #  define _DBUS_GNUC_EXTENSION __extension__    64 #  define _DBUS_GNUC_EXTENSION    67 #if     (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4)) || \    69 #define _DBUS_GNUC_PRINTF( format_idx, arg_idx )    \    70   __attribute__((__format__ (__printf__, format_idx, arg_idx)))    71 #define _DBUS_GNUC_NORETURN                         \    72   __attribute__((__noreturn__))    73 #define _DBUS_GNUC_UNUSED                           \    74   __attribute__((__unused__))    76 #define _DBUS_GNUC_PRINTF( format_idx, arg_idx )    77 #define _DBUS_GNUC_NORETURN    78 #define _DBUS_GNUC_UNUSED    81 #if    __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)    82 #define DBUS_MALLOC     __attribute__((__malloc__))    87 #if     (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)    88 #define DBUS_ALLOC_SIZE(x) __attribute__((__alloc_size__(x)))    89 #define DBUS_ALLOC_SIZE2(x,y) __attribute__((__alloc_size__(x,y)))    91 #define DBUS_ALLOC_SIZE(x)    92 #define DBUS_ALLOC_SIZE2(x,y)    95 #if    (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)    96 #define _DBUS_GNUC_WARN_UNUSED_RESULT __attribute__((warn_unused_result))    98 #define _DBUS_GNUC_WARN_UNUSED_RESULT   186 #if defined(DBUS_EXPORT)   188 #elif defined(_WIN32)   189 #  if defined(DBUS_STATIC_BUILD)   191 #  elif defined(dbus_1_EXPORTS)   192 #  define DBUS_EXPORT __declspec(dllexport)   194 #  define DBUS_EXPORT __declspec(dllimport)   196 #elif defined(__GNUC__) && __GNUC__ >= 4   197 #  define DBUS_EXPORT __attribute__ ((__visibility__ ("default")))   202 #if defined(DBUS_PRIVATE_EXPORT)   204 #elif defined(_WIN32)   205 #  if defined(DBUS_STATIC_BUILD)   206 #    define DBUS_PRIVATE_EXPORT    207 #  elif defined(dbus_1_EXPORTS)   208 #    define DBUS_PRIVATE_EXPORT __declspec(dllexport)   210 #    define DBUS_PRIVATE_EXPORT __declspec(dllimport)   212 #elif defined(__GNUC__) && __GNUC__ >= 4   213 #  define DBUS_PRIVATE_EXPORT __attribute__ ((__visibility__ ("default")))   215 #  define DBUS_PRIVATE_EXPORT    226 #define _dbus_clear_pointer_impl(T, pointer_to_pointer, destroy) \   228     T **_pp = (pointer_to_pointer); \   233     if (_value != NULL) \