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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
* (C) Copyright 2014 Red Hat, Inc.
*/
#ifndef __NM_UTILS_INTERNAL_H__
#define __NM_UTILS_INTERNAL_H__
#include <glib.h>
/********************************************************/
/* http://stackoverflow.com/a/11172679 */
#define _NM_UTILS_MACRO_FIRST(...) __NM_UTILS_MACRO_FIRST_HELPER(__VA_ARGS__, throwaway)
#define __NM_UTILS_MACRO_FIRST_HELPER(first, ...) first
#define _NM_UTILS_MACRO_REST(...) __NM_UTILS_MACRO_REST_HELPER(__NM_UTILS_MACRO_REST_NUM(__VA_ARGS__), __VA_ARGS__)
#define __NM_UTILS_MACRO_REST_HELPER(qty, ...) __NM_UTILS_MACRO_REST_HELPER2(qty, __VA_ARGS__)
#define __NM_UTILS_MACRO_REST_HELPER2(qty, ...) __NM_UTILS_MACRO_REST_HELPER_##qty(__VA_ARGS__)
#define __NM_UTILS_MACRO_REST_HELPER_ONE(first)
#define __NM_UTILS_MACRO_REST_HELPER_TWOORMORE(first, ...) , __VA_ARGS__
#define __NM_UTILS_MACRO_REST_NUM(...) \
__NM_UTILS_MACRO_REST_SELECT_20TH(__VA_ARGS__, \
TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE,\
TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE,\
TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE,\
TWOORMORE, TWOORMORE, TWOORMORE, ONE, throwaway)
#define __NM_UTILS_MACRO_REST_SELECT_20TH(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20, ...) a20
/********************************************************/
#if defined (__GNUC__)
#define _NM_PRAGMA_WARNING_DO(warning) G_STRINGIFY(GCC diagnostic ignored warning)
#elif defined (__clang__)
#define _NM_PRAGMA_WARNING_DO(warning) G_STRINGIFY(clang diagnostic ignored warning)
#endif
/* you can only suppress a specific warning that the compiler
* understands. Otherwise you will get another compiler warning
* about invalid pragma option.
* It's not that bad however, because gcc and clang often have the
* same name for the same warning. */
#if defined (__GNUC__)
#define NM_PRAGMA_WARNING_DISABLE(warning) \
_Pragma("GCC diagnostic push"); \
_Pragma(_NM_PRAGMA_WARNING_DO(warning))
#elif defined (__clang__)
#define NM_PRAGMA_WARNING_DISABLE(warning) \
_Pragma("clang diagnostic push"); \
_Pragma(_NM_PRAGMA_WARNING_DO(warning))
#else
#define NM_PRAGMA_WARNING_DISABLE(warning)
#endif
#if defined (__GNUC__)
#define NM_PRAGMA_WARNING_REENABLE \
_Pragma("GCC diagnostic pop")
#elif defined (__clang__)
#define NM_PRAGMA_WARNING_REENABLE \
_Pragma("clang diagnostic pop")
#else
#define NM_PRAGMA_WARNING_REENABLE
#endif
/********************************************************/
/* macro to return strlen() of a compile time string. */
#define STRLEN(str) ( sizeof ("" str) - 1 )
#define NM_IN_SET(x, y, ...) \
({ \
const typeof(y) _y = (y); \
typeof(_y) _x = (x); \
unsigned _i; \
gboolean _found = FALSE; \
for (_i = 0; _i < 1 + sizeof((typeof(_x)[]) { __VA_ARGS__ })/sizeof(typeof(_x)); _i++) { \
if (((typeof(_x)[]) { _y, __VA_ARGS__ })[_i] == _x) { \
_found = TRUE; \
break; \
} \
} \
_found; \
})
/*****************************************************************************/
#define NM_DEFINE_SINGLETON_INSTANCE(TYPE) \
static TYPE *singleton_instance
#define NM_DEFINE_SINGLETON_WEAK_REF(TYPE) \
NM_DEFINE_SINGLETON_INSTANCE (TYPE); \
static void \
_singleton_instance_weak_ref_cb (gpointer data, \
GObject *where_the_object_was) \
{ \
nm_log_dbg (LOGD_CORE, "disposing %s singleton (%p)", G_STRINGIFY (TYPE), singleton_instance); \
singleton_instance = NULL; \
} \
static inline void \
nm_singleton_instance_weak_ref_register (void) \
{ \
g_object_weak_ref (G_OBJECT (singleton_instance), _singleton_instance_weak_ref_cb, NULL); \
}
#define NM_DEFINE_SINGLETON_DESTRUCTOR(TYPE) \
NM_DEFINE_SINGLETON_INSTANCE (TYPE); \
static void __attribute__((destructor)) \
_singleton_destructor (void) \
{ \
if (singleton_instance) { \
if (G_OBJECT (singleton_instance)->ref_count > 1) \
nm_log_dbg (LOGD_CORE, "disown %s singleton (%p)", G_STRINGIFY (TYPE), singleton_instance); \
g_object_unref (singleton_instance); \
} \
}
/* By default, the getter will assert that the singleton will be created only once. You can
* change this by redefining NM_DEFINE_SINGLETON_ALLOW_MULTIPLE. */
#ifndef NM_DEFINE_SINGLETON_ALLOW_MULTIPLE
#define NM_DEFINE_SINGLETON_ALLOW_MULTIPLE FALSE
#endif
#define NM_DEFINE_SINGLETON_GETTER(TYPE, GETTER, GTYPE, ...) \
NM_DEFINE_SINGLETON_INSTANCE (TYPE); \
NM_DEFINE_SINGLETON_WEAK_REF (TYPE); \
TYPE * \
GETTER (void) \
{ \
if (G_UNLIKELY (!singleton_instance)) { \
static char _already_created = FALSE; \
\
g_assert (!_already_created || (NM_DEFINE_SINGLETON_ALLOW_MULTIPLE)); \
_already_created = TRUE;\
singleton_instance = (g_object_new (GTYPE, ##__VA_ARGS__, NULL)); \
g_assert (singleton_instance); \
nm_singleton_instance_weak_ref_register (); \
nm_log_dbg (LOGD_CORE, "create %s singleton (%p)", G_STRINGIFY (TYPE), singleton_instance); \
} \
return singleton_instance; \
} \
NM_DEFINE_SINGLETON_DESTRUCTOR(TYPE)
/*****************************************************************************/
#endif
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