[GObject, long] Gtype for enum + runtime init or by init function.

[Uzytkownik <uzytkownik2 poczta onet pl>]

1. In g_param_spec_enum I must have GType of this enum.
a) Why this function need it?
b) How create for enum GType?

2. I should register GType in package_name_get_type or
package_class_init:
a)
GType package_name_get_type() {
        static GType type = 0;
        
        if(type == 0) {
                static const GTypeInfo info = {
                        sizeof(PackageNameClass),
                
                        (GBaseInitFunc)NULL,
                        (GBaseFinalizeFunc)NULL,
                                
                        (GClassInitFunc)package_name_class_init,
                        (GClassFinalizeFunc)NULL,
                        (gconstpointer)NULL,
                        
                        sizeof(PackageName),
                        0,
                        (GInstanceInitFunc)package_name_init
                };
                type = g_type_register_static(G_TYPE_OBJECT, "PackageName", &info, 0);
        }
        
        return type;
}
b)
static GType package_name_type;
GType package_name_get_type() {
        return package_name_type;
}

void package_name_init() {
        static const GTypeInfo info = {
                sizeof(PackageNameClass),
        
                (GBaseInitFunc)NULL,
                (GBaseFinalizeFunc)NULL,
                        
                (GClassInitFunc)package_name_class_init,
                (GClassFinalizeFunc)NULL,
                (gconstpointer)NULL,
                
                sizeof(PackageName),
                0,
                (GInstanceInitFunc)package_name_init
        };
        package_name_type = g_type_register_static(G_TYPE_OBJECT,
"PackageName", &info, 0);
}

void package_init() {
        //(...)
        package_name_init();
}

Thanks in advance.
Regards
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