Registers a private class structure for a classed type; when the class is allocated, the private structures for the class and all of its parent types are allocated sequentially in the same memory block as the public structures, and are zero-filled.
This function should be called in the type's get_type
function after the type is registered. The private structure can be
retrieved using the G_TYPE_CLASS_GET_PRIVATE
macro.
private_size |
size of private structure |
class_type |
GType of a classed type |