1 /* GObject - GLib Type, Object, Parameter and Signal Library

     2  * Copyright (C) 2006 Imendio AB

     3  * Portions copyright (c) 2009 Nokia Corporation.  All rights reserved.

     4  * This library is free software; you can redistribute it and/or

     5  * modify it under the terms of the GNU Lesser General Public

     6  * License as published by the Free Software Foundation; either

     7  * version 2 of the License, or (at your option) any later version.

     8  *

     9  * This library is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    12  * Lesser General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU Lesser General

    15  * Public License along with this library; if not, write to the

    16  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,

    17  * Boston, MA 02111-1307, USA.

    18  */

    19 #undef  G_LOG_DOMAIN

    20 #define G_LOG_DOMAIN "TestSingleton"

    21 #include <glib-object.h>

    22 #include <string.h>

    23 #ifdef __SYMBIAN32__

    24 #include "mrt2_glib2_test.h"

    25 #endif //__SYMBIAN32__

    26 /* --- MySingleton class --- */

    27 typedef struct {

    28   GObject parent_instance;

    29 } MySingleton;

    30 typedef struct {

    31   GObjectClass parent_class;

    32 } MySingletonClass;

    33 

    34 #define MY_TYPE_SINGLETON         (my_singleton_get_type ())

    35 #define MY_SINGLETON(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), MY_TYPE_SINGLETON, MySingleton))

    36 #define MY_IS_SINGLETON(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), MY_TYPE_SINGLETON))

    37 #define MY_SINGLETON_CLASS(c)     (G_TYPE_CHECK_CLASS_CAST ((c), MY_TYPE_SINGLETON, MySingletonClass))

    38 #define MY_IS_SINGLETON_CLASS(c)  (G_TYPE_CHECK_CLASS_TYPE ((c), MY_TYPE_SINGLETON))

    39 #define MY_SINGLETON_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), MY_TYPE_SINGLETON, MySingletonClass))

    40 

    41 G_DEFINE_TYPE (MySingleton, my_singleton, G_TYPE_OBJECT);

    42 

    43 static MySingleton *the_one_and_only = NULL;

    44 

    45 /* --- methods --- */

    46 static GObject*

    47 my_singleton_constructor (GType                  type,

    48                           guint                  n_construct_properties,

    49                           GObjectConstructParam *construct_properties)

    50 {

    51   if (the_one_and_only)

    52     return g_object_ref (the_one_and_only);

    53   else

    54     return G_OBJECT_CLASS (my_singleton_parent_class)->constructor (type, n_construct_properties, construct_properties);

    55 }

    56 

    57 static void

    58 my_singleton_init (MySingleton *self)

    59 {

    60   g_assert (the_one_and_only == NULL);

    61   the_one_and_only = self;

    62 }

    63 

    64 static void

    65 my_singleton_class_init (MySingletonClass *klass)

    66 {

    67   G_OBJECT_CLASS (klass)->constructor = my_singleton_constructor;

    68 }

    69 

    70 /* --- test program --- */

    71 int

    72 main (int   argc,

    73       char *argv[])

    74 {

    75   MySingleton *singleton, *obj;

    76     #ifdef __SYMBIAN32__

    77   g_log_set_handler (NULL,  G_LOG_FLAG_FATAL| G_LOG_FLAG_RECURSION | G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_WARNING | G_LOG_LEVEL_MESSAGE | G_LOG_LEVEL_INFO | G_LOG_LEVEL_DEBUG, &mrtLogHandler, NULL);

    78   g_set_print_handler(mrtPrintHandler);

    79   #endif /*__SYMBIAN32__*/

    80   g_type_init_with_debug_flags (G_TYPE_DEBUG_OBJECTS | G_TYPE_DEBUG_SIGNALS);

    81   /* create the singleton */

    82   singleton = g_object_new (MY_TYPE_SINGLETON, NULL);

    83   g_assert (singleton != NULL);

    84   /* assert _singleton_ creation */

    85   obj = g_object_new (MY_TYPE_SINGLETON, NULL);

    86   g_assert (singleton == obj);

    87   g_object_unref (obj);

    88   /* shutdown */

    89   g_object_unref (singleton);

    90       #ifdef __SYMBIAN32__

    91   testResultXml("singleton");

    92   #endif //__SYMBIAN32__

    93   return 0;

    94 }