+(eval-when (:compile-toplevel :load-toplevel :execute)
+ (defclass type-info (struct)
+ ((class-size :allocation :alien :type (unsigned 16) :initarg :class-size)
+ (base-init :allocation :alien :type pointer)
+ (base-finalize :allocation :alien :type pointer)
+ (class-init :allocation :alien :type pointer)
+ (class-finalize :allocation :alien :type pointer)
+ (class-data :allocation :alien :type pointer)
+ (instance-size :allocation :alien :type (unsigned 16)
+ :initarg :instance-size)
+ (n-preallocs :allocation :alien :type (unsigned 16))
+ (instance-init :allocation :alien :type pointer)
+ (value-table :allocation :alien :type pointer))
+ (:metaclass struct-class)))
+
+(defbinding %type-register-static () type-number
+ (parent-type type-number)
+ (name string)
+ (info type-info)
+ (0 unsigned-int))
+
+(defun register-new-type (type parent &optional foreign-name)
+ (let ((parent-info (type-query parent)))
+ (with-slots ((parent-number type-number) class-size instance-size) parent-info
+ (let ((type-number
+ (%type-register-static
+ parent-number
+ (or foreign-name (default-alien-type-name type))
+ (make-instance 'type-info :class-size class-size :instance-size instance-size))))
+ (pushnew (list type parent foreign-name) *registered-static-types* :key #'car)
+ (setf (gethash type *lisp-type-to-type-number*) type-number)
+ (setf (gethash type-number *type-number-to-lisp-type*) type)
+ type-number))))
+
+
+
+;;;; Metaclass for subclasses of ginstance
+
+(eval-when (:compile-toplevel :load-toplevel :execute)
+ (defclass ginstance-class (proxy-class)
+ ((gtype :initarg :gtype :initform nil :reader ginstance-class-gtype))))
+
+
+(defun update-size (class)
+ (let ((type-number (find-type-number class)))
+ (cond
+ ((not (slot-boundp class 'size))
+ (setf (slot-value class 'size) (type-instance-size type-number)))
+ ((and
+ (slot-boundp class 'size)
+ (not (= (type-instance-size type-number) (slot-value class 'size))))
+ (warn "Size mismatch for class ~A" class)))))
+
+
+(defmethod finalize-inheritance ((class ginstance-class))
+ (call-next-method)
+ (let* ((class-name (class-name class))
+ (super (most-specific-proxy-superclass class))
+ (gtype (or
+ (first (ginstance-class-gtype class))
+ (default-alien-type-name class-name)))
+ (type-number
+ (or
+ (find-type-number class-name)
+ (let ((type-number
+ (if (or
+ (symbolp gtype)
+ (type-number-from-glib-name gtype nil))
+ (register-type class-name gtype)
+ (register-new-type class-name (class-name super) gtype))))
+ (type-class-ref type-number)
+ type-number))))
+ (when (and
+ (supertype type-number)
+ (not (eq (class-name super) (supertype type-number))))
+ (warn "~A is the super type for ~A in the gobject type system."
+ (supertype type-number) class-name)))
+
+ (update-size class))
+
+
+(defmethod shared-initialize ((class ginstance-class) names &rest initargs)
+ (declare (ignore initargs))
+ (call-next-method)
+ (when (class-finalized-p class)
+ (update-size class)))
+
+
+(defmethod validate-superclass ((class ginstance-class) (super standard-class))
+ (subtypep (class-name super) 'ginstance))