正在装载数据…… A type, as manipulated by the Glib type system, is much more generic than what is usually understood as an Object type. It is best explained by looking at the structure and the functions used to register new types in the type system.  typedef struct _GTypeInfo GTypeInfo;
struct _GTypeInfo
  ...{
  /**//* interface types, classed types, instantiated types */
 guint16 class_size;
GBaseInitFunc base_init;
GBaseFinalizeFunc base_finalize;
/**//* classed types, instantiated types */
GClassInitFunc class_init;
GClassFinalizeFunc class_finalize;
gconstpointer class_data;
/**//* instantiated types */
guint16 instance_size;
guint16 n_divallocs;
GInstanceInitFunc instance_init;
/**//* value handling */
const GTypeValueTable *value_table;
 };
GType g_type_register_static (GType parent_type,
const gchar *type_name,
const GTypeInfo *info,
GTypeFlags flags);
GType g_type_register_fundamental (GType type_id,
const gchar *type_name,
const GTypeInfo *info,
const GTypeFundamentalInfo *finfo,
GTypeFlags flags);A Glib dynamic type is define in structure GTypeInfo, which
class size: the class_size field in GTypeInfo.
class initialization functions (C++ constructor): the base_init and class_init fields in GTypeInfo.
class destruction functions (C++ destructor): the base_finalize and class_finalize fields in GTypeInfo.
instance size (C++ parameter to new): the instance_size field in GTypeInfo.
instanciation policy (C++ type of new operator): the n_divallocs field in GTypeInfo.
copy functions (C++ copy operators): the value_table field in GTypeInfo.
type characteristic flags: GTypeFlags.本文来源：http://blog.csdn.net/overthere/archive/2007/08/23/1756167.aspx
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