1 /* GLib testing framework examples and tests
2 * Copyright (C) 2008 Imendio AB
5 * This work is provided "as is"; redistribution and modification
6 * in whole or in part, in any medium, physical or electronic is
7 * permitted without restriction.
9 * This work 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.
13 * In no event shall the authors or contributors be liable for any
14 * direct, indirect, incidental, special, exemplary, or consequential
15 * damages (including, but not limited to, procurement of substitute
16 * goods or services; loss of use, data, or profits; or business
17 * interruption) however caused and on any theory of liability, whether
18 * in contract, strict liability, or tort (including negligence or
19 * otherwise) arising in any way out of the use of this software, even
20 * if advised of the possibility of such damage.
23 #include <glib-object.h>
25 #define G_DEFINE_INTERFACE(TN, t_n, T_P) G_DEFINE_INTERFACE_WITH_CODE(TN, t_n, T_P, ;)
26 #define G_DEFINE_INTERFACE_WITH_CODE(TN, t_n, T_P, _C_) _G_DEFINE_INTERFACE_EXTENDED_BEGIN(TN, t_n, T_P) {_C_;} _G_DEFINE_INTERFACE_EXTENDED_END()
27 /* _default_init, ##Interface, if(TYPE_PREREQ); */
28 #define _G_DEFINE_INTERFACE_EXTENDED_BEGIN(TypeName, type_name, TYPE_PREREQ) \
29 static void type_name##_default_init (TypeName##Interface *klass); \
31 type_name##_get_type (void) \
33 static volatile gsize g_define_type_id__volatile = 0; \
34 if (g_once_init_enter (&g_define_type_id__volatile)) \
36 GType g_define_type_id = \
37 g_type_register_static_simple (G_TYPE_INTERFACE, \
38 g_intern_static_string (#TypeName), \
39 sizeof (TypeName##Interface), \
40 (GClassInitFunc) type_name##_default_init, \
42 (GInstanceInitFunc) NULL, \
45 g_type_interface_add_prerequisite (g_define_type_id, TYPE_PREREQ); \
46 { /* custom code follows */
47 #define _G_DEFINE_INTERFACE_EXTENDED_END() \
48 /* following custom code */ \
50 g_once_init_leave (&g_define_type_id__volatile, g_define_type_id); \
52 return g_define_type_id__volatile; \
53 } /* closes type_name##_get_type() */
55 static volatile int mtsafe_call_counter = 0; /* multi thread safe call counter */
56 static int unsafe_call_counter = 0; /* single-threaded call counter */
58 #define NUM_COUNTER_INCREMENTS 100000
61 call_counter_init (gpointer tclass)
64 for (i = 0; i < NUM_COUNTER_INCREMENTS; i++)
66 int saved_unsafe_call_counter = unsafe_call_counter;
67 g_atomic_int_add (&mtsafe_call_counter, 1); // real call count update
68 g_thread_yield(); // let concurrent threads corrupt the unsafe_call_counter state
69 unsafe_call_counter = 1 + saved_unsafe_call_counter; // non-atomic counter update
73 static void interface_per_class_init () { call_counter_init (NULL); }
75 /* define 3 test interfaces */
76 typedef GTypeInterface MyFace0Interface;
77 G_DEFINE_INTERFACE (MyFace0, my_face0, G_TYPE_OBJECT);
78 static void my_face0_default_init (MyFace0Interface *iface) { call_counter_init (iface); }
79 typedef GTypeInterface MyFace1Interface;
80 G_DEFINE_INTERFACE (MyFace1, my_face1, G_TYPE_OBJECT);
81 static void my_face1_default_init (MyFace1Interface *iface) { call_counter_init (iface); }
82 typedef GTypeInterface MyFace2Interface;
83 G_DEFINE_INTERFACE (MyFace2, my_face2, G_TYPE_OBJECT);
84 static void my_face2_default_init (MyFace2Interface *iface) { call_counter_init (iface); }
86 /* define 3 test objects, adding interfaces 0 & 1, and adding interface 2 after class initialization */
87 typedef GObject MyTester0;
88 typedef GObjectClass MyTester0Class;
89 G_DEFINE_TYPE_WITH_CODE (MyTester0, my_tester0, G_TYPE_OBJECT,
90 G_IMPLEMENT_INTERFACE (my_face0_get_type(), interface_per_class_init);
91 G_IMPLEMENT_INTERFACE (my_face1_get_type(), interface_per_class_init);
93 static void my_tester0_init (MyTester0*t) {}
94 static void my_tester0_class_init (MyTester0Class*c) { call_counter_init (c); }
95 typedef GObject MyTester1;
96 typedef GObjectClass MyTester1Class;
97 G_DEFINE_TYPE_WITH_CODE (MyTester1, my_tester1, G_TYPE_OBJECT,
98 G_IMPLEMENT_INTERFACE (my_face0_get_type(), interface_per_class_init);
99 G_IMPLEMENT_INTERFACE (my_face1_get_type(), interface_per_class_init);
101 static void my_tester1_init (MyTester1*t) {}
102 static void my_tester1_class_init (MyTester1Class*c) { call_counter_init (c); }
103 typedef GObject MyTester2;
104 typedef GObjectClass MyTester2Class;
105 G_DEFINE_TYPE_WITH_CODE (MyTester2, my_tester2, G_TYPE_OBJECT,
106 G_IMPLEMENT_INTERFACE (my_face0_get_type(), interface_per_class_init);
107 G_IMPLEMENT_INTERFACE (my_face1_get_type(), interface_per_class_init);
109 static void my_tester2_init (MyTester2*t) {}
110 static void my_tester2_class_init (MyTester2Class*c) { call_counter_init (c); }
112 static GMutex *sync_mutex = NULL;
115 tester_init_thread (gpointer data)
117 const GInterfaceInfo face2_interface_info = { (GInterfaceInitFunc) interface_per_class_init, NULL, NULL };
119 /* first, syncronize with other threads,
120 * then run interface and class initializers,
121 * using unsafe_call_counter concurrently
123 g_mutex_lock (sync_mutex);
124 g_mutex_unlock (sync_mutex);
125 /* test default interface initialization for face0 */
126 g_type_default_interface_unref (g_type_default_interface_ref (my_face0_get_type()));
127 /* test class initialization, face0 per-class initializer, face1 default and per-class initializer */
128 klass = g_type_class_ref ((GType) data);
129 /* test face2 default and per-class initializer, after class_init */
130 g_type_add_interface_static (G_TYPE_FROM_CLASS (klass), my_face2_get_type(), &face2_interface_info);
132 g_type_class_unref (klass);
137 test_threaded_class_init (void)
139 GThread *threads[3] = { NULL, };
140 /* pause newly created threads */
141 sync_mutex = g_mutex_new();
142 g_mutex_lock (sync_mutex);
144 threads[0] = g_thread_create (tester_init_thread, (gpointer) my_tester0_get_type(), TRUE, NULL);
145 threads[1] = g_thread_create (tester_init_thread, (gpointer) my_tester1_get_type(), TRUE, NULL);
146 threads[2] = g_thread_create (tester_init_thread, (gpointer) my_tester2_get_type(), TRUE, NULL);
147 /* execute threads */
148 g_mutex_unlock (sync_mutex);
149 while (g_atomic_int_get (&mtsafe_call_counter) < (3 + 3 + 3 * 3) * NUM_COUNTER_INCREMENTS)
151 if (g_test_verbose())
152 g_print ("Initializers counted: %u\n", g_atomic_int_get (&mtsafe_call_counter));
153 g_usleep (50 * 1000); /* wait for threads to complete */
155 if (g_test_verbose())
156 g_print ("Total initializers: %u\n", g_atomic_int_get (&mtsafe_call_counter));
157 /* ensure non-corrupted counter updates */
158 g_assert_cmpint (g_atomic_int_get (&mtsafe_call_counter), ==, unsafe_call_counter);
165 g_thread_init (NULL);
166 g_test_init (&argc, &argv, NULL);
169 g_test_add_func ("/GObject/threaded-class-init", test_threaded_class_init);