gobject/testoverride.c - third_party/glib - Git at Google

 /* -*- mode: C; c-basic-offset: 4 -*- */
 #include <glib.h>
 #include <glib-object.h>

 static guint foo_signal_id = 0;
 static guint bar_signal_id = 0;


 static GType test_i_get_type (void);
 static GType test_a_get_type (void);
 static GType test_b_get_type (void);
 static GType test_c_get_type (void);

 #define TEST_TYPE_I (test_i_get_type ())
 #define TEST_I(object) (G_TYPE_CHECK_INSTANCE_CAST((object), TEST_TYPE_I, TestI))
 #define TEST_I_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST((vtable), TEST_TYPE_I, TestIClass))
 #define TEST_IS_I(object) (G_TYPE_CHECK_INSTANCE_TYPE((object), TEST_TYPE_I))
 #define TEST_IS_I_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE((vtable), TEST_TYPE_I))
 #define TEST_I_GET_CLASS(object) (G_TYPE_INSTANCE_GET_INTERFACE((object), TEST_TYPE_I, TestIClass))

 typedef struct _TestI TestI;
 typedef struct _TestIClass TestIClass;

 struct _TestIClass {
     GTypeInterface base_iface;
 };

 static void
 test_i_foo (TestI *self)
 {
     g_print("TestI::foo called.\n");
 }


 static void
 test_i_base_init (gpointer g_class)
 {
     static gboolean initialised = FALSE;

     if (!initialised) {
 	foo_signal_id = g_signal_newv("foo",
 				      TEST_TYPE_I,
 				      G_SIGNAL_RUN_LAST,
 				      g_cclosure_new(G_CALLBACK(test_i_foo),
 						     NULL, NULL),
 				      NULL, NULL,
 				      g_cclosure_marshal_VOID__VOID,
 				      G_TYPE_NONE, 0, NULL);
     }
     initialised = TRUE;
 }

 static GType
 test_i_get_type (void)
 {
     static GType type = 0;

     if (!type) {
 	static const GTypeInfo type_info = {
 	    sizeof (TestIClass),
 	    (GBaseInitFunc) test_i_base_init, /* base_init */
 	    NULL,             /* base_finalize */
 	};

 	type = g_type_register_static (G_TYPE_INTERFACE, "TestI",
 				       &type_info, 0);
     }

     return type;
 }


 #define TEST_TYPE_A (test_a_get_type())
 #define TEST_A(object) (G_TYPE_CHECK_INSTANCE_CAST((object), TEST_TYPE_A, TestA))
 #define TEST_A_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), TEST_TYPE_A, TestAClass))
 #define TEST_IS_A(object) (G_TYPE_CHECK_INSTANCE_TYPE((object), TEST_TYPE_A))
 #define TEST_IS_A_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), TEST_TYPE_A))
 #define TEST_A_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), TEST_TYPE_A, TestAClass))

 typedef struct _TestA TestA;
 typedef struct _TestAClass TestAClass;

 struct _TestA {
     GObject parent;
 };
 struct _TestAClass {
     GObjectClass parent_class;

     void (* bar) (TestA *self);
 };

 static void
 test_a_foo (TestI *self)
 {
     GValue args[1] = { { 0, } };

     g_print("TestA::foo called.  Chaining up.\n");

     g_value_init (&args[0], TEST_TYPE_A);
     g_value_set_object (&args[0], self);

     g_assert (g_signal_get_invocation_hint (self)->signal_id == foo_signal_id);
     g_signal_chain_from_overridden (args, NULL);

     g_value_unset (&args[0]);
 }

 static void
 test_a_bar (TestA *self)
 {
     g_print("TestA::bar called.\n");
 }

 static void
 test_a_class_init (TestAClass *class)
 {
     class->bar = test_a_bar;

     bar_signal_id = g_signal_new("bar",
 				 TEST_TYPE_A,
 				 G_SIGNAL_RUN_LAST,
 				 G_STRUCT_OFFSET (TestAClass, bar),
 				 NULL, NULL,
 				 g_cclosure_marshal_VOID__VOID,
 				 G_TYPE_NONE, 0);
 }

 static void
 test_a_interface_init (TestIClass *iface)
 {
     g_signal_override_class_closure (foo_signal_id,
 				     TEST_TYPE_A,
 				     g_cclosure_new (G_CALLBACK (test_a_foo),
 						     NULL, NULL));
 }

 static GType
 test_a_get_type (void)
 {
     static GType type = 0;

     if (!type) {
 	static const GTypeInfo type_info = {
             sizeof(TestAClass),
             (GBaseInitFunc) NULL,
             (GBaseFinalizeFunc) NULL,
             (GClassInitFunc) test_a_class_init,
             NULL, /* class_finalize */
             NULL, /* class_data */
             sizeof(TestAClass),
             0, /* n_preallocs */
             (GInstanceInitFunc) NULL,
 	};
 	static const GInterfaceInfo interface_info = {
 	    (GInterfaceInitFunc) test_a_interface_init,
 	    NULL,
 	    NULL
 	};

 	type = g_type_register_static (G_TYPE_OBJECT, "TestA",
 				       &type_info, 0);
 	g_type_add_interface_static (type, TEST_TYPE_I, &interface_info);
     }

   return type;
 }


 #define TEST_TYPE_B (test_b_get_type())
 #define TEST_B(object) (G_TYPE_CHECK_INSTANCE_CAST((object), TEST_TYPE_B, TestB))
 #define TEST_B_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), TEST_TYPE_B, TestBClass))
 #define TEST_IS_B(object) (G_TYPE_CHECK_INSTANCE_TYPE((object), TEST_TYPE_B))
 #define TEST_IS_B_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), TEST_TYPE_B))
 #define TEST_B_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), TEST_TYPE_B, TestBClass))

 typedef struct _TestB TestB;
 typedef struct _TestBClass TestBClass;

 struct _TestB {
     TestA parent;
 };
 struct _TestBClass {
     TestAClass parent_class;
 };

 static void
 test_b_foo (TestA *self)
 {
     GValue args[1] = { { 0, } };

     g_print("TestB::foo called.  Chaining up.\n");

     g_value_init (&args[0], TEST_TYPE_A);
     g_value_set_object (&args[0], self);

     g_assert (g_signal_get_invocation_hint (self)->signal_id == foo_signal_id);
     g_signal_chain_from_overridden (args, NULL);

     g_value_unset (&args[0]);
 }

 static void
 test_b_bar (TestI *self)
 {
     GValue args[1] = { { 0, } };

     g_print("TestB::bar called.  Chaining up.\n");

     g_value_init (&args[0], TEST_TYPE_A);
     g_value_set_object (&args[0], self);

     g_assert (g_signal_get_invocation_hint (self)->signal_id == bar_signal_id);
     g_signal_chain_from_overridden (args, NULL);

     g_value_unset (&args[0]);
 }

 static void
 test_b_class_init (TestBClass *class)
 {
     g_signal_override_class_closure (foo_signal_id,
 				     TEST_TYPE_B,
 				     g_cclosure_new (G_CALLBACK (test_b_foo),
 						     NULL, NULL));
     g_signal_override_class_closure (bar_signal_id,
 				     TEST_TYPE_B,
 				     g_cclosure_new (G_CALLBACK (test_b_bar),
 						     NULL, NULL));
 }

 static GType
 test_b_get_type (void)
 {
     static GType type = 0;

     if (!type) {
 	static const GTypeInfo type_info = {
             sizeof(TestBClass),
             (GBaseInitFunc) NULL,
             (GBaseFinalizeFunc) NULL,
             (GClassInitFunc) test_b_class_init,
             NULL, /* class_finalize */
             NULL, /* class_data */
             sizeof(TestBClass),
             0, /* n_preallocs */
             (GInstanceInitFunc) NULL,
 	};

 	type = g_type_register_static (TEST_TYPE_A, "TestB",
 				       &type_info, 0);
     }

   return type;
 }


 #define TEST_TYPE_C (test_c_get_type())
 #define TEST_C(object) (G_TYPE_CHECK_INSTANCE_CAST((object), TEST_TYPE_C, TestC))
 #define TEST_C_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), TEST_TYPE_C, TestCClass))
 #define TEST_IS_C(object) (G_TYPE_CHECK_INSTANCE_TYPE((object), TEST_TYPE_C))
 #define TEST_IS_C_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), TEST_TYPE_C))
 #define TEST_C_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), TEST_TYPE_C, TestCClass))

 typedef struct _TestC TestC;
 typedef struct _TestCClass TestCClass;

 struct _TestC {
     TestB parent;
 };
 struct _TestCClass {
     TestBClass parent_class;
 };

 static void
 test_c_foo (TestA *self)
 {
     GValue args[1] = { { 0, } };

     g_print("TestC::foo called.  Chaining up.\n");

     g_value_init (&args[0], TEST_TYPE_A);
     g_value_set_object (&args[0], self);

     g_assert (g_signal_get_invocation_hint (self)->signal_id == foo_signal_id);
     g_signal_chain_from_overridden (args, NULL);

     g_value_unset (&args[0]);
 }

 static void
 test_c_bar (TestI *self)
 {
     GValue args[1] = { { 0, } };

     g_print("TestC::bar called.  Chaining up.\n");

     g_value_init (&args[0], TEST_TYPE_A);
     g_value_set_object (&args[0], self);

     g_assert (g_signal_get_invocation_hint (self)->signal_id == bar_signal_id);
     g_signal_chain_from_overridden (args, NULL);

     g_value_unset (&args[0]);
 }

 static void
 test_c_class_init (TestBClass *class)
 {
     g_signal_override_class_closure (foo_signal_id,
 				     TEST_TYPE_C,
 				     g_cclosure_new (G_CALLBACK (test_c_foo),
 						     NULL, NULL));
     g_signal_override_class_closure (bar_signal_id,
 				     TEST_TYPE_C,
 				     g_cclosure_new (G_CALLBACK (test_c_bar),
 						     NULL, NULL));
 }

 static GType
 test_c_get_type (void)
 {
     static GType type = 0;

     if (!type) {
 	static const GTypeInfo type_info = {
             sizeof(TestCClass),
             (GBaseInitFunc) NULL,
             (GBaseFinalizeFunc) NULL,
             (GClassInitFunc) test_c_class_init,
             NULL, /* class_finalize */
             NULL, /* class_data */
             sizeof(TestCClass),
             0, /* n_preallocs */
             (GInstanceInitFunc) NULL,
 	};

 	type = g_type_register_static (TEST_TYPE_B, "TestC",
 				       &type_info, 0);
     }

   return type;
 }


 int
 main (int argc, char **argv)
 {
     GObject *self;

     g_type_init();

     self = g_object_new(TEST_TYPE_A, NULL);
     g_print("*** emiting foo on a TestA instance (expect chain A->I)\n");
     g_signal_emit(self, foo_signal_id, 0);
     g_print("*** emiting bar on a TestA instance\n");
     g_signal_emit(self, bar_signal_id, 0);
     g_object_unref(self);

     g_print("\n");

     self = g_object_new(TEST_TYPE_B, NULL);
     g_print("*** emiting foo on a TestB instance (expect chain B->A->I)\n");
     g_signal_emit(self, foo_signal_id, 0);
     g_print("*** emiting bar on a TestB instance (expect chain B->A)\n");
     g_signal_emit(self, bar_signal_id, 0);
     g_object_unref(self);

     g_print("\n");

     self = g_object_new(TEST_TYPE_C, NULL);
     g_print("*** emiting foo on a TestC instance (expect chain C->B->A->I)\n");
     g_signal_emit(self, foo_signal_id, 0);
     g_print("*** emiting bar on a TestC instance (expect chain C->B->A)\n");
     g_signal_emit(self, bar_signal_id, 0);
     g_object_unref(self);

     return 0;
 }
	/* -- mode: C; c-basic-offset: 4 -- */
	#include <glib.h>
	#include <glib-object.h>

	static guint foo_signal_id = 0;
	static guint bar_signal_id = 0;


	static GType test_i_get_type (void);
	static GType test_a_get_type (void);
	static GType test_b_get_type (void);
	static GType test_c_get_type (void);

	#define TEST_TYPE_I (test_i_get_type ())
	#define TEST_I(object) (G_TYPE_CHECK_INSTANCE_CAST((object), TEST_TYPE_I, TestI))
	#define TEST_I_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST((vtable), TEST_TYPE_I, TestIClass))
	#define TEST_IS_I(object) (G_TYPE_CHECK_INSTANCE_TYPE((object), TEST_TYPE_I))
	#define TEST_IS_I_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE((vtable), TEST_TYPE_I))
	#define TEST_I_GET_CLASS(object) (G_TYPE_INSTANCE_GET_INTERFACE((object), TEST_TYPE_I, TestIClass))

	typedef struct _TestI TestI;
	typedef struct _TestIClass TestIClass;

	struct _TestIClass {
	GTypeInterface base_iface;
	};

	static void
	test_i_foo (TestI *self)
	{
	g_print("TestI::foo called.\n");
	}


	static void
	test_i_base_init (gpointer g_class)
	{
	static gboolean initialised = FALSE;

	if (!initialised) {
	foo_signal_id = g_signal_newv("foo",
	TEST_TYPE_I,
	G_SIGNAL_RUN_LAST,
	g_cclosure_new(G_CALLBACK(test_i_foo),
	NULL, NULL),
	NULL, NULL,
	g_cclosure_marshal_VOID__VOID,
	G_TYPE_NONE, 0, NULL);
	}
	initialised = TRUE;
	}

	static GType
	test_i_get_type (void)
	{
	static GType type = 0;

	if (!type) {
	static const GTypeInfo type_info = {
	sizeof (TestIClass),
	(GBaseInitFunc) test_i_base_init, /* base_init */
	NULL, /* base_finalize */
	};

	type = g_type_register_static (G_TYPE_INTERFACE, "TestI",
	&type_info, 0);
	}

	return type;
	}



	#define TEST_TYPE_A (test_a_get_type())
	#define TEST_A(object) (G_TYPE_CHECK_INSTANCE_CAST((object), TEST_TYPE_A, TestA))
	#define TEST_A_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), TEST_TYPE_A, TestAClass))
	#define TEST_IS_A(object) (G_TYPE_CHECK_INSTANCE_TYPE((object), TEST_TYPE_A))
	#define TEST_IS_A_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), TEST_TYPE_A))
	#define TEST_A_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), TEST_TYPE_A, TestAClass))

	typedef struct _TestA TestA;
	typedef struct _TestAClass TestAClass;

	struct _TestA {
	GObject parent;
	};
	struct _TestAClass {
	GObjectClass parent_class;

	void (* bar) (TestA *self);
	};

	static void
	test_a_foo (TestI *self)
	{
	GValue args[1] = { { 0, } };

	g_print("TestA::foo called. Chaining up.\n");

	g_value_init (&args[0], TEST_TYPE_A);
	g_value_set_object (&args[0], self);

	g_assert (g_signal_get_invocation_hint (self)->signal_id == foo_signal_id);
	g_signal_chain_from_overridden (args, NULL);

	g_value_unset (&args[0]);
	}

	static void
	test_a_bar (TestA *self)
	{
	g_print("TestA::bar called.\n");
	}

	static void
	test_a_class_init (TestAClass *class)
	{
	class->bar = test_a_bar;

	bar_signal_id = g_signal_new("bar",
	TEST_TYPE_A,
	G_SIGNAL_RUN_LAST,
	G_STRUCT_OFFSET (TestAClass, bar),
	NULL, NULL,
	g_cclosure_marshal_VOID__VOID,
	G_TYPE_NONE, 0);
	}

	static void
	test_a_interface_init (TestIClass *iface)
	{
	g_signal_override_class_closure (foo_signal_id,
	TEST_TYPE_A,
	g_cclosure_new (G_CALLBACK (test_a_foo),
	NULL, NULL));
	}

	static GType
	test_a_get_type (void)
	{
	static GType type = 0;

	if (!type) {
	static const GTypeInfo type_info = {
	sizeof(TestAClass),
	(GBaseInitFunc) NULL,
	(GBaseFinalizeFunc) NULL,
	(GClassInitFunc) test_a_class_init,
	NULL, /* class_finalize */
	NULL, /* class_data */
	sizeof(TestAClass),
	0, /* n_preallocs */
	(GInstanceInitFunc) NULL,
	};
	static const GInterfaceInfo interface_info = {
	(GInterfaceInitFunc) test_a_interface_init,
	NULL,
	NULL
	};

	type = g_type_register_static (G_TYPE_OBJECT, "TestA",
	&type_info, 0);
	g_type_add_interface_static (type, TEST_TYPE_I, &interface_info);
	}

	return type;
	}


	#define TEST_TYPE_B (test_b_get_type())
	#define TEST_B(object) (G_TYPE_CHECK_INSTANCE_CAST((object), TEST_TYPE_B, TestB))
	#define TEST_B_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), TEST_TYPE_B, TestBClass))
	#define TEST_IS_B(object) (G_TYPE_CHECK_INSTANCE_TYPE((object), TEST_TYPE_B))
	#define TEST_IS_B_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), TEST_TYPE_B))
	#define TEST_B_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), TEST_TYPE_B, TestBClass))

	typedef struct _TestB TestB;
	typedef struct _TestBClass TestBClass;

	struct _TestB {
	TestA parent;
	};
	struct _TestBClass {
	TestAClass parent_class;
	};

	static void
	test_b_foo (TestA *self)
	{
	GValue args[1] = { { 0, } };

	g_print("TestB::foo called. Chaining up.\n");

	g_value_init (&args[0], TEST_TYPE_A);
	g_value_set_object (&args[0], self);

	g_assert (g_signal_get_invocation_hint (self)->signal_id == foo_signal_id);
	g_signal_chain_from_overridden (args, NULL);

	g_value_unset (&args[0]);
	}

	static void
	test_b_bar (TestI *self)
	{
	GValue args[1] = { { 0, } };

	g_print("TestB::bar called. Chaining up.\n");

	g_value_init (&args[0], TEST_TYPE_A);
	g_value_set_object (&args[0], self);

	g_assert (g_signal_get_invocation_hint (self)->signal_id == bar_signal_id);
	g_signal_chain_from_overridden (args, NULL);

	g_value_unset (&args[0]);
	}

	static void
	test_b_class_init (TestBClass *class)
	{
	g_signal_override_class_closure (foo_signal_id,
	TEST_TYPE_B,
	g_cclosure_new (G_CALLBACK (test_b_foo),
	NULL, NULL));
	g_signal_override_class_closure (bar_signal_id,
	TEST_TYPE_B,
	g_cclosure_new (G_CALLBACK (test_b_bar),
	NULL, NULL));
	}

	static GType
	test_b_get_type (void)
	{
	static GType type = 0;

	if (!type) {
	static const GTypeInfo type_info = {
	sizeof(TestBClass),
	(GBaseInitFunc) NULL,
	(GBaseFinalizeFunc) NULL,
	(GClassInitFunc) test_b_class_init,
	NULL, /* class_finalize */
	NULL, /* class_data */
	sizeof(TestBClass),
	0, /* n_preallocs */
	(GInstanceInitFunc) NULL,
	};

	type = g_type_register_static (TEST_TYPE_A, "TestB",
	&type_info, 0);
	}

	return type;
	}


	#define TEST_TYPE_C (test_c_get_type())
	#define TEST_C(object) (G_TYPE_CHECK_INSTANCE_CAST((object), TEST_TYPE_C, TestC))
	#define TEST_C_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), TEST_TYPE_C, TestCClass))
	#define TEST_IS_C(object) (G_TYPE_CHECK_INSTANCE_TYPE((object), TEST_TYPE_C))
	#define TEST_IS_C_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), TEST_TYPE_C))
	#define TEST_C_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), TEST_TYPE_C, TestCClass))

	typedef struct _TestC TestC;
	typedef struct _TestCClass TestCClass;

	struct _TestC {
	TestB parent;
	};
	struct _TestCClass {
	TestBClass parent_class;
	};

	static void
	test_c_foo (TestA *self)
	{
	GValue args[1] = { { 0, } };

	g_print("TestC::foo called. Chaining up.\n");

	g_value_init (&args[0], TEST_TYPE_A);
	g_value_set_object (&args[0], self);

	g_assert (g_signal_get_invocation_hint (self)->signal_id == foo_signal_id);
	g_signal_chain_from_overridden (args, NULL);

	g_value_unset (&args[0]);
	}

	static void
	test_c_bar (TestI *self)
	{
	GValue args[1] = { { 0, } };

	g_print("TestC::bar called. Chaining up.\n");

	g_value_init (&args[0], TEST_TYPE_A);
	g_value_set_object (&args[0], self);

	g_assert (g_signal_get_invocation_hint (self)->signal_id == bar_signal_id);
	g_signal_chain_from_overridden (args, NULL);

	g_value_unset (&args[0]);
	}

	static void
	test_c_class_init (TestBClass *class)
	{
	g_signal_override_class_closure (foo_signal_id,
	TEST_TYPE_C,
	g_cclosure_new (G_CALLBACK (test_c_foo),
	NULL, NULL));
	g_signal_override_class_closure (bar_signal_id,
	TEST_TYPE_C,
	g_cclosure_new (G_CALLBACK (test_c_bar),
	NULL, NULL));
	}

	static GType
	test_c_get_type (void)
	{
	static GType type = 0;

	if (!type) {
	static const GTypeInfo type_info = {
	sizeof(TestCClass),
	(GBaseInitFunc) NULL,
	(GBaseFinalizeFunc) NULL,
	(GClassInitFunc) test_c_class_init,
	NULL, /* class_finalize */
	NULL, /* class_data */
	sizeof(TestCClass),
	0, /* n_preallocs */
	(GInstanceInitFunc) NULL,
	};

	type = g_type_register_static (TEST_TYPE_B, "TestC",
	&type_info, 0);
	}

	return type;
	}


	int
	main (int argc, char **argv)
	{
	GObject *self;

	g_type_init();

	self = g_object_new(TEST_TYPE_A, NULL);
	g_print("*** emiting foo on a TestA instance (expect chain A->I)\n");
	g_signal_emit(self, foo_signal_id, 0);
	g_print("*** emiting bar on a TestA instance\n");
	g_signal_emit(self, bar_signal_id, 0);
	g_object_unref(self);

	g_print("\n");

	self = g_object_new(TEST_TYPE_B, NULL);
	g_print("*** emiting foo on a TestB instance (expect chain B->A->I)\n");
	g_signal_emit(self, foo_signal_id, 0);
	g_print("*** emiting bar on a TestB instance (expect chain B->A)\n");
	g_signal_emit(self, bar_signal_id, 0);
	g_object_unref(self);

	g_print("\n");

	self = g_object_new(TEST_TYPE_C, NULL);
	g_print("*** emiting foo on a TestC instance (expect chain C->B->A->I)\n");
	g_signal_emit(self, foo_signal_id, 0);
	g_print("*** emiting bar on a TestC instance (expect chain C->B->A)\n");
	g_signal_emit(self, bar_signal_id, 0);
	g_object_unref(self);

	return 0;
	}