-;; Common Lisp bindings for GTK+ v2.0
-;; Copyright (C) 2000 Espen S. Johnsen <esj@stud.cs.uit.no>
+;; Common Lisp bindings for GTK+ v2.x
+;; Copyright 2000-2005 Espen S. Johnsen <espen@users.sf.net>
;;
-;; This library is free software; you can redistribute it and/or
-;; modify it under the terms of the GNU Lesser General Public
-;; License as published by the Free Software Foundation; either
-;; version 2 of the License, or (at your option) any later version.
+;; Permission is hereby granted, free of charge, to any person obtaining
+;; a copy of this software and associated documentation files (the
+;; "Software"), to deal in the Software without restriction, including
+;; without limitation the rights to use, copy, modify, merge, publish,
+;; distribute, sublicense, and/or sell copies of the Software, and to
+;; permit persons to whom the Software is furnished to do so, subject to
+;; the following conditions:
;;
-;; This library is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-;; Lesser General Public License for more details.
+;; The above copyright notice and this permission notice shall be
+;; included in all copies or substantial portions of the Software.
;;
-;; You should have received a copy of the GNU Lesser General Public
-;; License along with this library; if not, write to the Free Software
-;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+;; IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+;; CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-;; $Id: proxy.lisp,v 1.17 2004-12-26 11:40:14 espen Exp $
+;; $Id: proxy.lisp,v 1.36 2006-02-26 15:30:01 espen Exp $
(in-package "GLIB")
(getter :reader slot-definition-getter :initarg :getter)
(unbound :reader slot-definition-unbound :initarg :unbound)
(boundp :reader slot-definition-boundp :initarg :boundp)))
-
- (defvar *unbound-marker* (gensym "UNBOUND-MARKER-"))
-
- (defun most-specific-slot-value (instances slot &optional
- (default *unbound-marker*))
- (let ((object (find-if
- #'(lambda (ob)
- (and (slot-exists-p ob slot) (slot-boundp ob slot)))
- instances)))
- (if object
- (slot-value object slot)
- default))))
+ (defclass direct-special-slot-definition (standard-direct-slot-definition)
+ ((special :initarg :special :accessor slot-definition-special)))
+ (defclass effective-special-slot-definition (standard-effective-slot-definition)
+ ((special :initarg :special :accessor slot-definition-special))))
+
+(defvar *unbound-marker* (gensym "UNBOUND-MARKER-"))
+
+(defun most-specific-slot-value (instances slot &optional (default *unbound-marker*))
+ (let ((object (find-if
+ #'(lambda (ob)
+ (and (slot-exists-p ob slot) (slot-boundp ob slot)))
+ instances)))
+ (if object
+ (slot-value object slot)
+ default)))
+
(defmethod direct-slot-definition-class ((class virtual-slots-class) &rest initargs)
- (if (eq (getf initargs :allocation) :virtual)
- (find-class 'direct-virtual-slot-definition)
- (call-next-method)))
+ (cond
+ ((eq (getf initargs :allocation) :virtual)
+ (find-class 'direct-virtual-slot-definition))
+ ((getf initargs :special)
+ (find-class 'direct-special-slot-definition))
+ (t (call-next-method))))
(defmethod effective-slot-definition-class ((class virtual-slots-class) &rest initargs)
- (if (eq (getf initargs :allocation) :virtual)
- (find-class 'effective-virtual-slot-definition)
- (call-next-method)))
+ (cond
+ ((eq (getf initargs :allocation) :virtual)
+ (find-class 'effective-virtual-slot-definition))
+ ((getf initargs :special)
+ (find-class 'effective-special-slot-definition))
+ (t (call-next-method))))
(defmethod initialize-internal-slot-functions ((slotd effective-virtual-slot-definition))
(slot-value slotd 'reader-function)
#'(lambda (object)
(declare (ignore object))
- (error "Can't read slot: ~A" (slot-definition-name slotd)))
+ (error "Slot is not readable: ~A" (slot-definition-name slotd)))
(slot-value slotd 'boundp-function)
#'(lambda (object) (declare (ignore object)) nil))
(setq reader
(mkbinding getter
(slot-definition-type slotd) 'pointer)))
- (funcall reader (proxy-location object))))))))))
+ (funcall reader (foreign-location object))))))))))
(setf
(slot-value slotd 'boundp-function)
(setq reader
(mkbinding boundp
(slot-definition-type slotd) 'pointer)))
- (funcall reader (proxy-location object))))))))
- ((multiple-value-bind (unbound-p unbound-value)
- (unbound-value (slot-definition-type slotd))
- (when unbound-p
- #'(lambda (object)
- (not (eq (funcall getter-function object) unbound-value))))))
+ (funcall reader (foreign-location object))))))))
+ ((let ((unbound-value-method
+ (find-applicable-type-method 'unbound-value
+ (slot-definition-type slotd) nil)))
+ (when unbound-value-method
+ (let ((unbound-value
+ (funcall unbound-value-method (slot-definition-type slotd))))
+ #'(lambda (object)
+ (not (eq (funcall getter-function object) unbound-value)))))))
(#'(lambda (object) (declare (ignore object)) t))))
(setf
(and
(funcall boundp-function object)
(funcall getter-function object)))))
- ((multiple-value-bind (unbound-p unbound-value)
- (unbound-value (slot-definition-type slotd))
- (let ((slot-name (slot-definition-name slotd)))
- (when unbound-p
+ ((let ((unbound-value-method
+ (find-applicable-type-method 'unbound-value
+ (slot-definition-type slotd) nil)))
+ (when unbound-value-method
+ (let ((unbound-value
+ (funcall unbound-value-method (slot-definition-type slotd)))
+ (slot-name (slot-definition-name slotd)))
#'(lambda (object)
(let ((value (funcall getter-function object)))
(if (eq value unbound-value)
(setf
(slot-value slotd 'writer-function)
(if (not (slot-boundp slotd 'setter))
- #'(lambda (object)
- (declare (ignore object))
- (error "Can't set slot: ~A" (slot-definition-name slotd)))
+ #'(lambda (value object)
+ (declare (ignore value object))
+ (error "Slot is not writable: ~A" (slot-definition-name slotd)))
(with-slots (setter) slotd
(etypecase setter
(function setter)
(setq writer
(mkbinding setter 'nil 'pointer
(slot-definition-type slotd))))
- (funcall writer (proxy-location object) value)))))))))
+ (funcall writer (foreign-location object) value)))))))))
- (initialize-internal-slot-gfs (slot-definition-name slotd)))
+ #-sbcl>=0.9.8(initialize-internal-slot-gfs (slot-definition-name slotd)))
nil)
(defmethod compute-effective-slot-definition-initargs ((class virtual-slots-class) direct-slotds)
- (if (typep (first direct-slotds) 'direct-virtual-slot-definition)
- (let ((initargs ()))
- (let ((getter (most-specific-slot-value direct-slotds 'getter)))
- (unless (eq getter *unbound-marker*)
- (setf (getf initargs :getter) getter)))
- (let ((setter (most-specific-slot-value direct-slotds 'setter)))
- (unless (eq setter *unbound-marker*)
- (setf (getf initargs :setter) setter)))
- (let ((unbound (most-specific-slot-value direct-slotds 'unbound)))
- (unless (eq unbound *unbound-marker*)
- (setf (getf initargs :unbound) unbound)))
- (let ((boundp (most-specific-slot-value direct-slotds 'boundp)))
- (unless (eq boundp *unbound-marker*)
- (setf (getf initargs :boundp) boundp)))
- (nconc initargs (call-next-method)))
- (call-next-method)))
+ (typecase (first direct-slotds)
+ (direct-virtual-slot-definition
+ (let ((initargs ()))
+ (let ((getter (most-specific-slot-value direct-slotds 'getter)))
+ (unless (eq getter *unbound-marker*)
+ (setf (getf initargs :getter) getter)))
+ (let ((setter (most-specific-slot-value direct-slotds 'setter)))
+ (unless (eq setter *unbound-marker*)
+ (setf (getf initargs :setter) setter)))
+ (let ((unbound (most-specific-slot-value direct-slotds 'unbound)))
+ (unless (eq unbound *unbound-marker*)
+ (setf (getf initargs :unbound) unbound)))
+ (let ((boundp (most-specific-slot-value direct-slotds 'boundp)))
+ (unless (eq boundp *unbound-marker*)
+ (setf (getf initargs :boundp) boundp)))
+ ;; Need this to prevent type expansion in SBCL >= 0.9.8
+ (let ((type (most-specific-slot-value direct-slotds 'type)))
+ (unless (eq type *unbound-marker*)
+ (setf (getf initargs :type) type)))
+ (nconc initargs (call-next-method))))
+ (direct-special-slot-definition
+ (append '(:special t) (call-next-method)))
+ (t (call-next-method))))
(defmethod slot-value-using-class
t)
+(defmethod slot-definition-special ((slotd standard-direct-slot-definition))
+ (declare (ignore slotd))
+ nil)
+
+(defmethod slot-definition-special ((slotd standard-effective-slot-definition))
+ (declare (ignore slotd))
+ nil)
+
+
;;;; Proxy cache
-(internal *instance-cache*)
(defvar *instance-cache* (make-hash-table :test #'eql))
-(defun cache-instance (instance)
+(defun cache-instance (instance &optional (weak-ref t))
(setf
- (gethash (system:sap-int (proxy-location instance)) *instance-cache*)
- (ext:make-weak-pointer instance)))
+ (gethash (sap-int (foreign-location instance)) *instance-cache*)
+ (if weak-ref
+ (make-weak-pointer instance)
+ instance)))
(defun find-cached-instance (location)
- (let ((ref (gethash (system:sap-int location) *instance-cache*)))
+ (let ((ref (gethash (sap-int location) *instance-cache*)))
(when ref
- (ext:weak-pointer-value ref))))
+ (if (weak-pointer-p ref)
+ (weak-pointer-value ref)
+ ref))))
(defun instance-cached-p (location)
- (gethash (system:sap-int location) *instance-cache*))
+ (gethash (sap-int location) *instance-cache*))
(defun remove-cached-instance (location)
- (remhash (system:sap-int location) *instance-cache*))
+ (remhash (sap-int location) *instance-cache*))
;; For debuging
-(defun cached-instances ()
+(defun list-cached-instances ()
(let ((instances ()))
(maphash #'(lambda (location ref)
(declare (ignore location))
- (push (ext:weak-pointer-value ref) instances))
+ (push ref instances))
*instance-cache*)
instances))
+;; Instances that gets invalidated tend to be short lived, but created
+;; in large numbers. So we're keeping them in a hash table to be able
+;; to reuse them (and thus reduce consing)
+(defvar *invalidated-instance-cache* (make-hash-table :test #'eql))
+
+(defun cache-invalidated-instance (instance)
+ (push instance
+ (gethash (class-of instance) *invalidated-instance-cache*)))
+
+(defun find-invalidated-instance (class)
+ (when (gethash class *invalidated-instance-cache*)
+ (pop (gethash class *invalidated-instance-cache*))))
+
+(defun list-invalidated-instances ()
+ (let ((instances ()))
+ (maphash #'(lambda (location ref)
+ (declare (ignore location))
+ (push ref instances))
+ *invalidated-instance-cache*)
+ instances))
+
;;;; Proxy for alien instances
+;; TODO: add a ref-counted-proxy subclass
(defclass proxy ()
- ((location :reader proxy-location :type system-area-pointer)))
+ ((location :special t :type pointer))
+ (:metaclass virtual-slots-class))
-(defgeneric initialize-proxy (object &rest initargs))
(defgeneric instance-finalizer (object))
(defgeneric reference-foreign (class location))
(defgeneric unreference-foreign (class location))
+(defgeneric invalidate-instance (object))
+(defgeneric allocate-foreign (object &key &allow-other-keys))
+
+(defun foreign-location (instance)
+ (slot-value instance 'location))
+
+(defun (setf foreign-location) (location instance)
+ (setf (slot-value instance 'location) location))
+
+(defun proxy-valid-p (instance)
+ (slot-boundp instance 'location))
(defmethod reference-foreign ((name symbol) location)
(reference-foreign (find-class name) location))
(defmethod unreference-foreign :around ((class class) location)
(unless (null-pointer-p location)
-;; (format t "Unreferencing ~A at ~A" (class-name class) location)
-;; (finish-output *standard-output*)
- (call-next-method)
-;; (write-line " done")
-;; (finish-output *standard-output*)
- ))
+ (call-next-method)))
(defmethod print-object ((instance proxy) stream)
(print-unreadable-object (instance stream :type t :identity nil)
- (when (slot-boundp instance 'location)
- (format stream "at 0x~X" (sap-int (proxy-location instance))))))
-
-(defmethod initialize-instance :around ((instance proxy) &key location)
- (if location
- (setf (slot-value instance 'location) location)
- (call-next-method))
- (cache-instance instance)
- (ext:finalize instance (instance-finalizer instance))
- instance)
+ (if (slot-boundp instance 'location)
+ (format stream "at 0x~X" (sap-int (foreign-location instance)))
+ (write-string "at <unbound>" stream))))
+
+(defmethod initialize-instance :around ((instance proxy) &rest initargs &key &allow-other-keys)
+ (setf
+ (foreign-location instance)
+ (apply #'allocate-foreign instance initargs))
+ (prog1
+ (call-next-method)
+ (cache-instance instance)
+ (finalize instance (instance-finalizer instance))))
(defmethod instance-finalizer ((instance proxy))
- (let ((location (proxy-location instance))
+ (let ((location (foreign-location instance))
(class (class-of instance)))
;; (unless (find-method #'unreference-foreign nil (list (class-of class) t) nil)
;; (error "No matching method for UNREFERENCE-INSTANCE when called with class ~A" class))
(remove-cached-instance location)
(unreference-foreign class location))))
+;; Any reference to the foreign object the instance may have held
+;; should be released before this method is invoked
+(defmethod invalidate-instance ((instance proxy))
+ (remove-cached-instance (foreign-location instance))
+ (slot-makunbound instance 'location)
+ (cancel-finalization instance)
+ (cache-invalidated-instance instance))
+
;;;; Metaclass used for subclasses of proxy
+(defgeneric most-specific-proxy-superclass (class))
+(defgeneric direct-proxy-superclass (class))
+
+
(eval-when (:compile-toplevel :load-toplevel :execute)
(defclass proxy-class (virtual-slots-class)
- ((size :reader proxy-instance-size)))
+ ((size :reader foreign-size)))
(defclass direct-alien-slot-definition (direct-virtual-slot-definition)
- ((allocation :initform :alien)
- (offset :reader slot-definition-offset :initarg :offset)))
+ ((offset :reader slot-definition-offset :initarg :offset))
+ (:default-initargs :allocation :alien))
(defclass effective-alien-slot-definition (effective-virtual-slot-definition)
((offset :reader slot-definition-offset :initarg :offset)))
-
(defmethod most-specific-proxy-superclass ((class proxy-class))
(find-if
#'(lambda (class)
(subtypep (class-name class) 'proxy))
(cdr (compute-class-precedence-list class))))
-
+
(defmethod direct-proxy-superclass ((class proxy-class))
(find-if
#'(lambda (class)
(cond
(size (setf (slot-value class 'size) (first size)))
((slot-boundp class 'size) (slot-makunbound class 'size))))
-
+
(defmethod direct-slot-definition-class ((class proxy-class) &rest initargs)
(case (getf initargs :allocation)
- ((nil :alien) (find-class 'direct-alien-slot-definition))
+ (:alien (find-class 'direct-alien-slot-definition))
(t (call-next-method))))
(defmethod effective-slot-definition-class ((class proxy-class) &rest initargs)
(defmethod compute-effective-slot-definition-initargs ((class proxy-class) direct-slotds)
- (if (eq (most-specific-slot-value direct-slotds 'allocation) :alien)
+ (if (eq (slot-definition-allocation (first direct-slotds)) :alien)
(nconc
(list :offset (most-specific-slot-value direct-slotds 'offset))
(call-next-method))
(setf
(slot-value slotd 'getter)
#'(lambda (object)
- (funcall reader (proxy-location object) offset)))))
+ (funcall reader (foreign-location object) offset)))))
(unless (slot-boundp slotd 'setter)
(let ((writer (writer-function type))
(setf
(slot-value slotd 'setter)
#'(lambda (value object)
- (let ((location (proxy-location object)))
+ (let ((location (foreign-location object)))
(funcall destroy location offset) ; destroy old value
(funcall writer value location offset))))))))
(call-next-method))
-
;; TODO: call some C code to detect this a compile time
(defconstant +struct-alignmen+ 4)
+ (defun align-offset (size)
+ (if (zerop (mod size +struct-alignmen+))
+ size
+ (+ size (- +struct-alignmen+ (mod size +struct-alignmen+)))))
+
(defmethod compute-slots ((class proxy-class))
- (loop
- with offset = (let ((size-of-super-classes
- (proxy-instance-size
- (most-specific-proxy-superclass class))))
- (+ size-of-super-classes
- (mod size-of-super-classes +struct-alignmen+)))
- with size = offset
- for slotd in (class-direct-slots class)
- when (eq (slot-definition-allocation slotd) :alien)
- do (if (not (slot-boundp slotd 'offset))
- (setf (slot-value slotd 'offset) offset)
- (setq offset (slot-value slotd 'offset)))
-
- (incf offset (size-of (slot-definition-type slotd)))
- (incf offset (mod offset +struct-alignmen+))
- (setq size (max size offset))
-
- finally (unless (slot-boundp class 'size)
- (setf (slot-value class 'size) size)))
+ (let ((alien-slots
+ (remove-if-not
+ #'(lambda (slotd)
+ (eq (slot-definition-allocation slotd) :alien))
+ (class-direct-slots class))))
+ (when alien-slots
+ (loop
+ as offset = (align-offset (foreign-size
+ (most-specific-proxy-superclass class)))
+ then (align-offset
+ (+
+ (slot-definition-offset slotd)
+ (size-of (slot-definition-type slotd))))
+ for slotd in alien-slots
+ unless (slot-boundp slotd 'offset)
+ do (setf (slot-value slotd 'offset) offset))))
(call-next-method))
-
(defmethod validate-superclass ((class proxy-class) (super standard-class))
(subtypep (class-name super) 'proxy))
- (defmethod proxy-instance-size (class)
- (declare (ignore class))
- 0)
-)
+ (defmethod foreign-size ((class-name symbol))
+ (foreign-size (find-class class-name))))
+
+(defmethod foreign-size ((object proxy))
+ (foreign-size (class-of object)))
-(defmethod alien-type ((class proxy-class) &rest args)
- (declare (ignore class args))
+
+(define-type-method alien-type ((class proxy))
+ (declare (ignore class))
(alien-type 'pointer))
-(defmethod size-of ((class proxy-class) &rest args)
- (declare (ignore class args))
+(define-type-method size-of ((class proxy))
+ (declare (ignore class))
(size-of 'pointer))
-(defmethod from-alien-form (location (class proxy-class) &rest args)
- (declare (ignore args))
- `(ensure-proxy-instance ',(class-name class) ,location))
-
-(defmethod from-alien-function ((class proxy-class) &rest args)
- (declare (ignore args))
- #'(lambda (location)
- (ensure-proxy-instance class location)))
-
-(defmethod to-alien-form (instance (class proxy-class) &rest args)
- (declare (ignore class args))
- `(proxy-location ,instance))
-
-(defmethod to-alien-function ((class proxy-class) &rest args)
- (declare (ignore class args))
- #'proxy-location)
-
-(defmethod copy-from-alien-form (location (class proxy-class) &rest args)
- (declare (ignore args))
- (let ((class-name (class-name class)))
- `(ensure-proxy-instance ',class-name
- (reference-foreign ',class-name ,location))))
-
-(defmethod copy-from-alien-function ((class proxy-class) &rest args)
- (declare (ignore args))
- #'(lambda (location)
- (ensure-proxy-instance class (reference-foreign class location))))
-
-(defmethod copy-to-alien-form (instance (class proxy-class) &rest args)
- (declare (ignore args))
- `(reference-foreign ',(class-name class) (proxy-location ,instance)))
-
-(defmethod copy-to-alien-function ((class proxy-class) &rest args)
- (declare (ignore class args))
- #'(lambda (instance)
- (reference-foreign class (proxy-location instance))))
-
-(defmethod writer-function ((class proxy-class) &rest args)
- (declare (ignore args))
- #'(lambda (instance location &optional (offset 0))
- (assert (null-pointer-p (sap-ref-sap location offset)))
- (setf
- (sap-ref-sap location offset)
- (reference-foreign class (proxy-location instance)))))
-
-(defmethod reader-function ((class proxy-class) &rest args)
- (declare (ignore args))
- #'(lambda (location &optional (offset 0))
- (let ((instance (sap-ref-sap location offset)))
- (unless (null-pointer-p instance)
- (ensure-proxy-instance class (reference-foreign class instance))))))
-
-(defmethod destroy-function ((class proxy-class) &rest args)
- (declare (ignore args))
- #'(lambda (location &optional (offset 0))
- (unreference-foreign class (sap-ref-sap location offset))))
-
-(defmethod unbound-value ((class proxy-class) &rest args)
- (declare (ignore type args))
- (values t nil))
-
-(defgeneric ensure-proxy-instance (class location)
- (:documentation "Returns a proxy object representing the foreign object at the give location."))
+(define-type-method from-alien-form ((type proxy) location)
+ (let ((class (type-expand type)))
+ `(ensure-proxy-instance ',class ,location)))
+
+(define-type-method from-alien-function ((type proxy))
+ (let ((class (type-expand type)))
+ #'(lambda (location)
+ (ensure-proxy-instance class location))))
+
+(define-type-method to-alien-form ((type proxy) instance)
+ (declare (ignore type))
+ `(foreign-location ,instance))
+
+(define-type-method to-alien-function ((type proxy))
+ (declare (ignore type))
+ #'foreign-location)
+
+(define-type-method copy-from-alien-form ((type proxy) location)
+ (let ((class (type-expand type)))
+ `(ensure-proxy-instance ',class (reference-foreign ',class ,location))))
+
+(define-type-method copy-from-alien-function ((type proxy))
+ (let ((class (type-expand type)))
+ #'(lambda (location)
+ (ensure-proxy-instance class (reference-foreign class location)))))
+
+(define-type-method copy-to-alien-form ((type proxy) instance)
+ (let ((class (type-expand type)))
+ `(reference-foreign ',class (foreign-location ,instance))))
+
+(define-type-method copy-to-alien-function ((type proxy))
+ (let ((class (type-expand type)))
+ #'(lambda (instance)
+ (reference-foreign class (foreign-location instance)))))
+
+(define-type-method writer-function ((type proxy))
+ (let ((class (type-expand type)))
+ #'(lambda (instance location &optional (offset 0))
+ (assert (null-pointer-p (sap-ref-sap location offset)))
+ (setf
+ (sap-ref-sap location offset)
+ (reference-foreign class (foreign-location instance))))))
+
+(define-type-method reader-function ((type proxy))
+ (let ((class (type-expand type)))
+ #'(lambda (location &optional (offset 0) weak-p)
+ (declare (ignore weak-p))
+ (let ((instance (sap-ref-sap location offset)))
+ (unless (null-pointer-p instance)
+ (ensure-proxy-instance class (reference-foreign class instance)))))))
+
+(define-type-method destroy-function ((type proxy))
+ (let ((class (type-expand type)))
+ #'(lambda (location &optional (offset 0))
+ (unreference-foreign class (sap-ref-sap location offset)))))
+
+(define-type-method unbound-value ((type proxy))
+ (declare (ignore type))
+ nil)
-(defmethod ensure-proxy-instance :around (class location)
+(defun ensure-proxy-instance (class location &rest initargs)
+ "Returns a proxy object representing the foreign object at the give
+location. If an existing object is not found in the cache
+MAKE-PROXY-INSTANCE is called to create one."
(unless (null-pointer-p location)
(or
- (find-cached-instance location)
- (call-next-method))))
-
-(defmethod ensure-proxy-instance ((class symbol) location)
- (ensure-proxy-instance (find-class class) location))
-
-(defmethod ensure-proxy-instance ((class proxy-class) location)
- (make-instance class :location location))
+ #-debug-ref-counting(find-cached-instance location)
+ #+debug-ref-counting
+ (let ((instance (find-cached-instance location)))
+ (when instance
+ (format t "Object found in cache: ~A~%" instance)
+ instance))
+ (let ((instance (apply #'make-proxy-instance class location initargs)))
+ (cache-instance instance)
+ instance))))
+
+(defgeneric make-proxy-instance (class location &key weak)
+ (:documentation "Creates a new proxy object representing the foreign
+object at the give location. If WEAK is non NIL the foreign memory
+will not be released when the proxy is garbage collected."))
+
+(defmethod make-proxy-instance ((class symbol) location &rest initargs)
+ (apply #'make-proxy-instance (find-class class) location initargs))
+
+(defmethod make-proxy-instance ((class proxy-class) location &key weak)
+ (let ((instance
+ (or
+ (find-invalidated-instance class)
+ (allocate-instance class))))
+ (setf (foreign-location instance) location)
+ (unless weak
+ (finalize instance (instance-finalizer instance)))
+ instance))
;;;; Superclasses for wrapping of C structures
(defclass struct (proxy)
()
- (:metaclass proxy-class))
+ (:metaclass proxy-class)
+ (:size 0))
-(defmethod initialize-instance ((struct struct) &rest initargs)
+(defmethod allocate-foreign ((struct struct) &rest initargs)
(declare (ignore initargs))
- (unless (slot-boundp struct 'location)
- (let ((size (proxy-instance-size (class-of struct))))
- (if (zerop size)
- (error "~A has zero size" (class-of struct))
- (setf (slot-value struct 'location) (allocate-memory size)))))
- (call-next-method))
+ (let ((size (foreign-size (class-of struct))))
+ (if (zerop size)
+ (error "~A has zero size" (class-of struct))
+ (allocate-memory size))))
;;;; Metaclasses used for subclasses of struct
-(defclass struct-class (proxy-class)
- ())
+(eval-when (:compile-toplevel :load-toplevel :execute)
+ (defclass struct-class (proxy-class)
+ ()))
+
+(defmethod direct-slot-definition-class ((class struct-class) &rest initargs)
+ (if (not (getf initargs :allocation))
+ (find-class 'direct-alien-slot-definition)
+ (call-next-method)))
(defmethod reference-foreign ((class struct-class) location)
- (copy-memory location (proxy-instance-size class)))
+ (copy-memory location (foreign-size class)))
(defmethod unreference-foreign ((class struct-class) location)
(deallocate-memory location))
+(defmethod compute-slots :around ((class struct-class))
+ (let ((slots (call-next-method)))
+ (when (and
+ #-sbcl>=0.9.8(class-finalized-p class)
+ (not (slot-boundp class 'size)))
+ (let ((size (loop
+ for slotd in slots
+ when (eq (slot-definition-allocation slotd) :alien)
+ maximize (+
+ (slot-definition-offset slotd)
+ (size-of (slot-definition-type slotd))))))
+ (setf (slot-value class 'size) (+ size (mod size +struct-alignmen+)))))
+ slots))
+
+(define-type-method callback-from-alien-form ((type struct) form)
+ (let ((class (type-expand type)))
+ `(ensure-proxy-instance ',class ,form :weak t)))
+
+(define-type-method callback-cleanup-form ((type struct) form)
+ (declare (ignore type))
+ `(invalidate-instance ,form))
+
+(define-type-method reader-function ((type struct))
+ (let ((class (type-expand type)))
+ #'(lambda (location &optional (offset 0) weak-p)
+ (let ((instance (sap-ref-sap location offset)))
+ (unless (null-pointer-p instance)
+ (if weak-p
+ (ensure-proxy-instance class instance :weak t)
+ (ensure-proxy-instance class (reference-foreign class instance))))))))
+
(defclass static-struct-class (struct-class)
())
(defmethod unreference-foreign ((class static-struct-class) location)
(declare (ignore class location))
nil)
+
+;;; Pseudo type for structs which are inlined in other objects
+
+(deftype inlined (type) type)
+
+(define-type-method size-of ((type inlined))
+ (let ((class (type-expand (second type))))
+ (foreign-size class)))
+
+(define-type-method reader-function ((type inlined))
+ (let ((class (type-expand (second type))))
+ #'(lambda (location &optional (offset 0) weak-p)
+ (declare (ignore weak-p))
+ (ensure-proxy-instance class
+ (reference-foreign class (sap+ location offset))))))
+
+(define-type-method writer-function ((type inlined))
+ (let ((class (type-expand (second type))))
+ #'(lambda (instance location &optional (offset 0))
+ (copy-memory (foreign-location instance) (foreign-size class) (sap+ location offset)))))
+
+(export 'inlined)
~mdw / clg / blobdiff