241 lines
6.6 KiB
C++
241 lines
6.6 KiB
C++
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
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/* dbus-macros.h generic macros
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*
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* Copyright (C) 2002 Red Hat Inc.
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*
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* Licensed under the Academic Free License version 2.1
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#if !defined (DBUS_INSIDE_DBUS_H) && !defined (DBUS_COMPILATION)
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#error "Only <dbus/dbus.h> can be included directly, this file may disappear or change contents."
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#endif
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#ifndef DBUS_MACROS_H
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#define DBUS_MACROS_H
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#ifdef __cplusplus
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# define DBUS_BEGIN_DECLS extern "C" {
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# define DBUS_END_DECLS }
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#else
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# define DBUS_BEGIN_DECLS
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# define DBUS_END_DECLS
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#endif
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#ifndef TRUE
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# define TRUE 1
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#endif
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#ifndef FALSE
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# define FALSE 0
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#endif
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#ifndef NULL
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# ifdef __cplusplus
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# define NULL (0L)
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# else /* !__cplusplus */
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# define NULL ((void*) 0)
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# endif /* !__cplusplus */
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#endif
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#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
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# define DBUS_DEPRECATED __attribute__ ((__deprecated__))
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#elif defined(_MSC_VER) && (_MSC_VER >= 1300)
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# define DBUS_DEPRECATED __declspec(deprecated)
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#else
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# define DBUS_DEPRECATED
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#endif
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#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)
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# define _DBUS_GNUC_EXTENSION __extension__
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#else
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# define _DBUS_GNUC_EXTENSION
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#endif
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#if (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4)) || \
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defined(__clang__)
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#define _DBUS_GNUC_PRINTF( format_idx, arg_idx ) \
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__attribute__((__format__ (__printf__, format_idx, arg_idx)))
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#define _DBUS_GNUC_NORETURN \
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__attribute__((__noreturn__))
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#define _DBUS_GNUC_UNUSED \
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__attribute__((__unused__))
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#else /* !__GNUC__ */
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#define _DBUS_GNUC_PRINTF( format_idx, arg_idx )
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#define _DBUS_GNUC_NORETURN
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#define _DBUS_GNUC_UNUSED
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#endif /* !__GNUC__ */
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#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
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#define DBUS_MALLOC __attribute__((__malloc__))
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#else
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#define DBUS_MALLOC
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#endif
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#if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
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#define DBUS_ALLOC_SIZE(x) __attribute__((__alloc_size__(x)))
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#define DBUS_ALLOC_SIZE2(x,y) __attribute__((__alloc_size__(x,y)))
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#else
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#define DBUS_ALLOC_SIZE(x)
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#define DBUS_ALLOC_SIZE2(x,y)
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#endif
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#if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
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#define _DBUS_GNUC_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
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#else
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#define _DBUS_GNUC_WARN_UNUSED_RESULT
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#endif
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/** @def _DBUS_GNUC_PRINTF
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* used to tell gcc about printf format strings
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*/
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/** @def _DBUS_GNUC_NORETURN
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* used to tell gcc about functions that never return, such as _dbus_abort()
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*/
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/** @def _DBUS_GNUC_WARN_UNUSED_RESULT
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* used to tell gcc about functions whose result must be used
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*/
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/* Normally docs are in .c files, but there isn't a .c file for this. */
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/**
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* @defgroup DBusMacros Utility macros
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* @ingroup DBus
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* @brief #TRUE, #FALSE, #NULL, and so on
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*
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* Utility macros.
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*
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* @{
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*/
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/**
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* @def DBUS_BEGIN_DECLS
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*
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* Macro used prior to declaring functions in the D-Bus header
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* files. Expands to "extern "C"" when using a C++ compiler,
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* and expands to nothing when using a C compiler.
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*
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* Please don't use this in your own code, consider it
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* D-Bus internal.
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*/
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/**
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* @def DBUS_END_DECLS
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*
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* Macro used after declaring functions in the D-Bus header
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* files. Expands to "}" when using a C++ compiler,
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* and expands to nothing when using a C compiler.
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*
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* Please don't use this in your own code, consider it
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* D-Bus internal.
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*/
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/**
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* @def TRUE
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*
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* Expands to "1"
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*/
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/**
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* @def FALSE
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*
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* Expands to "0"
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*/
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/**
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* @def NULL
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*
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* A null pointer, defined appropriately for C or C++.
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*/
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/**
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* @def DBUS_DEPRECATED
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*
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* Tells the compiler to warn about a function or type if it's used.
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* Code marked in this way should also be enclosed in
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* @code
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* #ifndef DBUS_DISABLE_DEPRECATED
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* deprecated stuff here
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* #endif
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* @endcode
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*
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* Please don't use this in your own code, consider it
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* D-Bus internal.
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*/
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/**
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* @def _DBUS_GNUC_EXTENSION
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*
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* Tells gcc not to warn about extensions to the C standard in the
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* following expression, even if compiling with -pedantic. Do not use
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* this macro in your own code; please consider it to be internal to libdbus.
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*/
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/*
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* @def DBUS_EXPORT
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*
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* Declare the following symbol as public. This is currently a noop on
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* platforms other than Windows.
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*/
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#if defined(DBUS_EXPORT)
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/* value forced by compiler command line, don't redefine */
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#elif defined(_WIN32)
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# if defined(DBUS_STATIC_BUILD)
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# define DBUS_EXPORT
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# elif defined(dbus_1_EXPORTS)
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# define DBUS_EXPORT __declspec(dllexport)
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# else
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# define DBUS_EXPORT __declspec(dllimport)
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# endif
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#elif defined(__GNUC__) && __GNUC__ >= 4
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# define DBUS_EXPORT __attribute__ ((__visibility__ ("default")))
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#else
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#define DBUS_EXPORT
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#endif
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#if defined(DBUS_PRIVATE_EXPORT)
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/* value forced by compiler command line, don't redefine */
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#elif defined(_WIN32)
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# if defined(DBUS_STATIC_BUILD)
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# define DBUS_PRIVATE_EXPORT /* no decoration */
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# elif defined(dbus_1_EXPORTS)
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# define DBUS_PRIVATE_EXPORT __declspec(dllexport)
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# else
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# define DBUS_PRIVATE_EXPORT __declspec(dllimport)
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# endif
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#elif defined(__GNUC__) && __GNUC__ >= 4
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# define DBUS_PRIVATE_EXPORT __attribute__ ((__visibility__ ("default")))
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#else
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# define DBUS_PRIVATE_EXPORT /* no decoration */
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#endif
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/* Implementation for dbus_clear_message() etc. This is not API,
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* do not use it directly.
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*
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* We're using a specific type (T ** and T *) instead of void ** and
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* void * partly for type-safety, partly to be strict-aliasing-compliant,
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* and partly to keep C++ compilers happy. This code is inlined into
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* users of libdbus, so we can't rely on it having dbus' own compiler
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* settings. */
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#define _dbus_clear_pointer_impl(T, pointer_to_pointer, destroy) \
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do { \
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T **_pp = (pointer_to_pointer); \
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T *_value = *_pp; \
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\
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*_pp = NULL; \
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\
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if (_value != NULL) \
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destroy (_value); \
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} while (0)
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/* Not (destroy) (_value) in case destroy() is a function-like macro */
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/** @} */
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#endif /* DBUS_MACROS_H */
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