g_type_module_use ()

gboolean
g_type_module_use (GTypeModule *module);

Increases the use count of a GTypeModule by one. If the use count was zero before, the plugin will be loaded. If loading the plugin fails, the use count is reset to its prior value.

g_type_module_unuse ()

void
g_type_module_unuse (GTypeModule *module);

Decreases the use count of a GTypeModule by one. If the result is zero, the module will be unloaded. (However, the GTypeModule will not be freed, and types associated with the GTypeModule are not unregistered. Once a GTypeModule is initialized, it must exist forever.)

g_type_module_set_name ()

void
g_type_module_set_name (GTypeModule *module,
                        const gchar *name);

Sets the name for a GTypeModule

g_type_module_register_type ()

GType
g_type_module_register_type (GTypeModule *module,
                             GType parent_type,
                             const gchar *type_name,
                             const GTypeInfo *type_info,
                             GTypeFlags flags);

Looks up or registers a type that is implemented with a particular type plugin. If a type with name type_name was previously registered, the GType identifier for the type is returned, otherwise the type is newly registered, and the resulting GType identifier returned.

When reregistering a type (typically because a module is unloaded then reloaded, and reinitialized), module and parent_type must be the same as they were previously.

As long as any instances of the type exist, the type plugin will not be unloaded.

Since 2.56 if module is NULL this will call g_type_register_static() instead. This can be used when making a static build of the module.

g_type_module_add_interface ()

void
g_type_module_add_interface (GTypeModule *module,
                             GType instance_type,
                             GType interface_type,
                             const GInterfaceInfo *interface_info);

Registers an additional interface for a type, whose interface lives in the given type plugin. If the interface was already registered for the type in this plugin, nothing will be done.

As long as any instances of the type exist, the type plugin will not be unloaded.

Since 2.56 if module is NULL this will call g_type_add_interface_static() instead. This can be used when making a static build of the module.

g_type_module_register_enum ()

GType
g_type_module_register_enum (GTypeModule *module,
                             const gchar *name,
                             const GEnumValue *const_static_values);

Looks up or registers an enumeration that is implemented with a particular type plugin. If a type with name type_name was previously registered, the GType identifier for the type is returned, otherwise the type is newly registered, and the resulting GType identifier returned.

As long as any instances of the type exist, the type plugin will not be unloaded.

Since 2.56 if module is NULL this will call g_type_register_static() instead. This can be used when making a static build of the module.

Since: 2.6

g_type_module_register_flags ()

GType
g_type_module_register_flags (GTypeModule *module,
                              const gchar *name,
                              const GFlagsValue *const_static_values);

Looks up or registers a flags type that is implemented with a particular type plugin. If a type with name type_name was previously registered, the GType identifier for the type is returned, otherwise the type is newly registered, and the resulting GType identifier returned.

As long as any instances of the type exist, the type plugin will not be unloaded.

Since 2.56 if module is NULL this will call g_type_register_static() instead. This can be used when making a static build of the module.

Since: 2.6

G_DEFINE_DYNAMIC_TYPE()

#define G_DEFINE_DYNAMIC_TYPE(TN, t_n, T_P)          G_DEFINE_DYNAMIC_TYPE_EXTENDED (TN, t_n, T_P, 0, {})

A convenience macro for dynamic type implementations, which declares a class initialization function, an instance initialization function (see GTypeInfo for information about these) and a static variable named t_n_parent_class pointing to the parent class.

Furthermore, it defines a *_get_type() and a static *_register_type() functions for use in your module_init().

See G_DEFINE_DYNAMIC_TYPE_EXTENDED() for an example.

Since: 2.14

G_DEFINE_DYNAMIC_TYPE_EXTENDED()

#define             G_DEFINE_DYNAMIC_TYPE_EXTENDED(TypeName, type_name, TYPE_PARENT, flags, CODE)

A more general version of G_DEFINE_DYNAMIC_TYPE() which allows to specify GTypeFlags and custom code.

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G_DEFINE_DYNAMIC_TYPE_EXTENDED (GtkGadget,
                                gtk_gadget,
                                GTK_TYPE_THING,
                                0,
                                G_IMPLEMENT_INTERFACE_DYNAMIC (TYPE_GIZMO,
                                                               gtk_gadget_gizmo_init));

expands to

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static void     gtk_gadget_init              (GtkGadget      *self);
static void     gtk_gadget_class_init        (GtkGadgetClass *klass);
static void     gtk_gadget_class_finalize    (GtkGadgetClass *klass);

static gpointer gtk_gadget_parent_class = NULL;
static GType    gtk_gadget_type_id = 0;

static void     gtk_gadget_class_intern_init (gpointer klass)
{
  gtk_gadget_parent_class = g_type_class_peek_parent (klass); 
  gtk_gadget_class_init ((GtkGadgetClass*) klass); 
}

GType
gtk_gadget_get_type (void)
{
  return gtk_gadget_type_id;
}

static void
gtk_gadget_register_type (GTypeModule *type_module)
{
  const GTypeInfo g_define_type_info = {
    sizeof (GtkGadgetClass),
    (GBaseInitFunc) NULL,
    (GBaseFinalizeFunc) NULL,
    (GClassInitFunc) gtk_gadget_class_intern_init,
    (GClassFinalizeFunc) gtk_gadget_class_finalize,
    NULL,   // class_data
    sizeof (GtkGadget),
    0,      // n_preallocs
    (GInstanceInitFunc) gtk_gadget_init, 
    NULL    // value_table
  };
  gtk_gadget_type_id = g_type_module_register_type (type_module,
                                                    GTK_TYPE_THING,
                                                    "GtkGadget",
                                                    &g_define_type_info,
                                                    (GTypeFlags) flags);
  {
    const GInterfaceInfo g_implement_interface_info = {
      (GInterfaceInitFunc) gtk_gadget_gizmo_init
    };
    g_type_module_add_interface (type_module, g_define_type_id, TYPE_GIZMO, &g_implement_interface_info);
  }
}

Since: 2.14

G_IMPLEMENT_INTERFACE_DYNAMIC()

#define             G_IMPLEMENT_INTERFACE_DYNAMIC(TYPE_IFACE, iface_init)

A convenience macro to ease interface addition in the _C_ section of G_DEFINE_DYNAMIC_TYPE_EXTENDED().

See G_DEFINE_DYNAMIC_TYPE_EXTENDED() for an example.

Note that this macro can only be used together with the G_DEFINE_DYNAMIC_TYPE_EXTENDED macros, since it depends on variable names from that macro.

Since: 2.24

G_ADD_PRIVATE_DYNAMIC()

#define             G_ADD_PRIVATE_DYNAMIC(TypeName)

A convenience macro to ease adding private data to instances of a new dynamic type in the _C_ section of G_DEFINE_DYNAMIC_TYPE_EXTENDED().

See G_ADD_PRIVATE() for details, it is similar but for static types.

Note that this macro can only be used together with the G_DEFINE_DYNAMIC_TYPE_EXTENDED macros, since it depends on variable names from that macro.

Since: 2.38

struct GTypeModule

struct GTypeModule {
  gchar *name;
};

The members of the GTypeModule structure should not be accessed directly, except for the name field.

struct GTypeModuleClass

struct GTypeModuleClass {
  GObjectClass parent_class;

  gboolean (* load)   (GTypeModule *module);
  void     (* unload) (GTypeModule *module);
};

In order to implement dynamic loading of types based on GTypeModule, the load and unload functions in GTypeModuleClass must be implemented.