utils: imported singleton setup from NetworkManager
This commit is contained in:
@@ -166,6 +166,7 @@ ModemManager_SOURCES = \
|
||||
mm-context.c \
|
||||
mm-log.c \
|
||||
mm-log.h \
|
||||
mm-utils.h \
|
||||
mm-private-boxed-types.h \
|
||||
mm-private-boxed-types.c \
|
||||
mm-auth.h \
|
||||
|
83
src/mm-utils.h
Normal file
83
src/mm-utils.h
Normal file
@@ -0,0 +1,83 @@
|
||||
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
||||
/*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program 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 General Public License for more details:
|
||||
*
|
||||
* Singleton support imported from NetworkManager.
|
||||
* (C) Copyright 2014 Red Hat, Inc.
|
||||
*/
|
||||
|
||||
#ifndef MM_UTILS_H
|
||||
#define MM_UTILS_H
|
||||
|
||||
#include <glib.h>
|
||||
#include <glib-object.h>
|
||||
|
||||
#include "mm-log.h"
|
||||
|
||||
/*****************************************************************************/
|
||||
|
||||
#define MM_DEFINE_SINGLETON_INSTANCE(TYPE) \
|
||||
static TYPE *singleton_instance
|
||||
|
||||
#define MM_DEFINE_SINGLETON_WEAK_REF(TYPE) \
|
||||
MM_DEFINE_SINGLETON_INSTANCE (TYPE); \
|
||||
static void \
|
||||
_singleton_instance_weak_ref_cb (gpointer data, \
|
||||
GObject *where_the_object_was) \
|
||||
{ \
|
||||
mm_dbg ("disposing %s singleton (%p)", G_STRINGIFY (TYPE), singleton_instance); \
|
||||
singleton_instance = NULL; \
|
||||
} \
|
||||
static inline void \
|
||||
mm_singleton_instance_weak_ref_register (void) \
|
||||
{ \
|
||||
g_object_weak_ref (G_OBJECT (singleton_instance), _singleton_instance_weak_ref_cb, NULL); \
|
||||
}
|
||||
|
||||
#define MM_DEFINE_SINGLETON_DESTRUCTOR(TYPE) \
|
||||
MM_DEFINE_SINGLETON_INSTANCE (TYPE); \
|
||||
static void __attribute__((destructor)) \
|
||||
_singleton_destructor (void) \
|
||||
{ \
|
||||
if (singleton_instance) { \
|
||||
if (G_OBJECT (singleton_instance)->ref_count > 1) \
|
||||
mm_dbg ("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 MM_DEFINE_SINGLETON_ALLOW_MULTIPLE. */
|
||||
#ifndef MM_DEFINE_SINGLETON_ALLOW_MULTIPLE
|
||||
#define MM_DEFINE_SINGLETON_ALLOW_MULTIPLE FALSE
|
||||
#endif
|
||||
|
||||
#define MM_DEFINE_SINGLETON_GETTER(TYPE, GETTER, GTYPE, ...) \
|
||||
MM_DEFINE_SINGLETON_INSTANCE (TYPE); \
|
||||
MM_DEFINE_SINGLETON_WEAK_REF (TYPE); \
|
||||
TYPE * \
|
||||
GETTER (void) \
|
||||
{ \
|
||||
if (G_UNLIKELY (!singleton_instance)) { \
|
||||
static char _already_created = FALSE; \
|
||||
\
|
||||
g_assert (!_already_created || (MM_DEFINE_SINGLETON_ALLOW_MULTIPLE)); \
|
||||
_already_created = TRUE; \
|
||||
singleton_instance = (g_object_new (GTYPE, ##__VA_ARGS__, NULL)); \
|
||||
g_assert (singleton_instance); \
|
||||
mm_singleton_instance_weak_ref_register (); \
|
||||
mm_dbg ("create %s singleton (%p)", G_STRINGIFY (TYPE), singleton_instance); \
|
||||
} \
|
||||
return singleton_instance; \
|
||||
} \
|
||||
MM_DEFINE_SINGLETON_DESTRUCTOR(TYPE)
|
||||
|
||||
#endif /* MM_UTILS_H */
|
Reference in New Issue
Block a user