(define-condition unbound-slot (cell-error)
((instance :reader unbound-slot-instance :initarg :instance))
(:report (lambda (condition stream)
- (format stream "The slot ~S is unbound in the object ~S."
- (cell-error-name condition)
- (unbound-slot-instance condition)))))
+ (handler-case
+ (format stream "~@<The slot ~/sb-ext:print-symbol-with-prefix/ ~
+ is unbound in the object ~A.~@:>"
+ (cell-error-name condition)
+ (unbound-slot-instance condition))
+ (serious-condition ()
+ ;; In case of an error try again avoiding custom PRINT-OBJECT's.
+ (format stream "~&Error during printing.~%~@<The slot ~
+ ~/sb-ext:print-symbol-with-prefix/ ~
+ is unbound in an instance of ~
+ ~/sb-ext:print-symbol-with-prefix/.~@:>"
+ (cell-error-name condition)
+ (type-of (unbound-slot-instance condition))))))))
(defmethod wrapper-fetcher ((class standard-class))
'std-instance-wrapper)
(defmethod raw-instance-allocator ((class standard-class))
'allocate-standard-instance)
-;;; These four functions work on std-instances and fsc-instances. These are
+;;; These three functions work on std-instances and fsc-instances. These are
;;; instances for which it is possible to change the wrapper and the slots.
;;;
;;; For these kinds of instances, most specified methods from the instance
;;; structure protocol are promoted to the implementation-specific class
;;; std-class. Many of these methods call these four functions.
-(defun set-wrapper (inst new)
- (cond ((std-instance-p inst)
- (setf (std-instance-wrapper inst) new))
- ((fsc-instance-p inst)
- (setf (fsc-instance-wrapper inst) new))
+(defun %swap-wrappers-and-slots (i1 i2)
+ (cond ((std-instance-p i1)
+ (let ((w1 (std-instance-wrapper i1))
+ (s1 (std-instance-slots i1)))
+ (setf (std-instance-wrapper i1) (std-instance-wrapper i2))
+ (setf (std-instance-slots i1) (std-instance-slots i2))
+ (setf (std-instance-wrapper i2) w1)
+ (setf (std-instance-slots i2) s1)))
+ ((fsc-instance-p i1)
+ (let ((w1 (fsc-instance-wrapper i1))
+ (s1 (fsc-instance-slots i1)))
+ (setf (fsc-instance-wrapper i1) (fsc-instance-wrapper i2))
+ (setf (fsc-instance-slots i1) (fsc-instance-slots i2))
+ (setf (fsc-instance-wrapper i2) w1)
+ (setf (fsc-instance-slots i2) s1)))
(t
(error "unrecognized instance type"))))
-
-(defun swap-wrappers-and-slots (i1 i2)
- (with-pcl-lock ;FIXME is this sufficient?
- (cond ((std-instance-p i1)
- (let ((w1 (std-instance-wrapper i1))
- (s1 (std-instance-slots i1)))
- (setf (std-instance-wrapper i1) (std-instance-wrapper i2))
- (setf (std-instance-slots i1) (std-instance-slots i2))
- (setf (std-instance-wrapper i2) w1)
- (setf (std-instance-slots i2) s1)))
- ((fsc-instance-p i1)
- (let ((w1 (fsc-instance-wrapper i1))
- (s1 (fsc-instance-slots i1)))
- (setf (fsc-instance-wrapper i1) (fsc-instance-wrapper i2))
- (setf (fsc-instance-slots i1) (fsc-instance-slots i2))
- (setf (fsc-instance-wrapper i2) w1)
- (setf (fsc-instance-slots i2) s1)))
- (t
- (error "unrecognized instance type")))))
\f
;;;; STANDARD-INSTANCE-ACCESS
-(declaim (inline standard-instance-access (setf standard-instance-access)
+(declaim (inline standard-instance-access
+ (setf standard-instance-access)
+ (cas stadard-instance-access)
funcallable-standard-instance-access
- (setf funcallable-standard-instance-access)))
+ (setf funcallable-standard-instance-access)
+ (cas funcallable-standard-instance-access)))
(defun standard-instance-access (instance location)
(clos-slots-ref (std-instance-slots instance) location))
(defun (setf standard-instance-access) (new-value instance location)
(setf (clos-slots-ref (std-instance-slots instance) location) new-value))
+(defun (cas standard-instance-access) (old-value new-value instance location)
+ ;; FIXME: Maybe get rid of CLOS-SLOTS-REF entirely?
+ (cas (svref (std-instance-slots instance) location) old-value new-value))
+
(defun funcallable-standard-instance-access (instance location)
(clos-slots-ref (fsc-instance-slots instance) location))
(defun (setf funcallable-standard-instance-access) (new-value instance location)
(setf (clos-slots-ref (fsc-instance-slots instance) location) new-value))
+
+(defun (cas funcallable-standard-instance-access) (old-value new-value instance location)
+ ;; FIXME: Maybe get rid of CLOS-SLOTS-REF entirely?
+ (cas (svref (fsc-instance-slots instance) location) old-value new-value))
\f
;;;; SLOT-VALUE, (SETF SLOT-VALUE), SLOT-BOUNDP, SLOT-MAKUNBOUND
(declaim (ftype (sfunction (t symbol) t) slot-value))
(defun slot-value (object slot-name)
- (let* ((wrapper (check-obsolete-instance/wrapper-of object))
- (cell (find-slot-cell wrapper slot-name))
+ (let* ((wrapper (valid-wrapper-of object))
+ (cell (or (find-slot-cell wrapper slot-name)
+ (return-from slot-value
+ (values (slot-missing (wrapper-class* wrapper) object slot-name
+ 'slot-value)))))
(location (car cell))
(value
(cond ((fixnump location)
(funcallable-standard-instance-access object location)))
((consp location)
(cdr location))
- ((eq t location)
- (return-from slot-value
- (slot-value-using-class (wrapper-class* wrapper) object (cddr cell))))
- ((not cell)
+ ((not location)
(return-from slot-value
- (values (slot-missing (wrapper-class* wrapper) object slot-name
- 'slot-value))))
+ (funcall (slot-info-reader (cdr cell)) object)))
(t
(bug "Bogus slot cell in SLOT-VALUE: ~S" cell)))))
(if (eq +slot-unbound+ value)
(slot-unbound (wrapper-class* wrapper) object slot-name)
value)))
+;;; This is used during the PCL build, but gets replaced by a deftransform
+;;; in fixup.lisp.
(define-compiler-macro slot-value (&whole form object slot-name
&environment env)
(if (and (constantp slot-name env)
form))
(defun set-slot-value (object slot-name new-value)
- (let* ((wrapper (check-obsolete-instance/wrapper-of object))
- (cell (find-slot-cell wrapper slot-name))
+ (let* ((wrapper (valid-wrapper-of object))
+ (cell (or (find-slot-cell wrapper slot-name)
+ (return-from set-slot-value
+ (values (slot-missing (wrapper-class* wrapper) object slot-name
+ 'setf new-value)))))
(location (car cell))
- (type-check-function (cadr cell)))
- (when type-check-function
- (funcall (the function type-check-function) new-value))
+ (info (cdr cell))
+ (typecheck (slot-info-typecheck info)))
+ (when typecheck
+ (funcall typecheck new-value))
(cond ((fixnump location)
(if (std-instance-p object)
(setf (standard-instance-access object location) new-value)
new-value)))
((consp location)
(setf (cdr location) new-value))
- ((eq t location)
- (setf (slot-value-using-class (wrapper-class* wrapper) object (cddr cell))
- new-value))
- ((not cell)
- (slot-missing (wrapper-class* wrapper) object slot-name 'setf new-value))
+ ((not location)
+ (funcall (slot-info-writer info) new-value object))
(t
(bug "Bogus slot-cell in SET-SLOT-VALUE: ~S" cell))))
new-value)
(defun safe-set-slot-value (object slot-name new-value)
(set-slot-value object slot-name new-value))
+;;; This is used during the PCL build, but gets replaced by a deftransform
+;;; in fixup.lisp.
(define-compiler-macro set-slot-value (&whole form object slot-name new-value
&environment env)
(if (and (constantp slot-name env)
`(accessor-set-slot-value ,object ,slot-name ,new-value)
form))
+(defun (cas slot-value) (old-value new-value object slot-name)
+ (let* ((wrapper (valid-wrapper-of object))
+ (cell (or (find-slot-cell wrapper slot-name)
+ (return-from slot-value
+ (values (slot-missing (wrapper-class* wrapper) object slot-name
+ 'cas (list old-value new-value))))))
+ (location (car cell))
+ (info (cdr cell))
+ (typecheck (slot-info-typecheck info)))
+ (when typecheck
+ (funcall typecheck new-value))
+ (let ((old (cond ((fixnump location)
+ (if (std-instance-p object)
+ (cas (standard-instance-access object location) old-value new-value)
+ (cas (funcallable-standard-instance-access object location)
+ old-value new-value)))
+ ((consp location)
+ (cas (cdr location) old-value new-value))
+ ((not location)
+ ;; FIXME: (CAS SLOT-VALUE-USING-CLASS)...
+ (error "Cannot compare-and-swap slot ~S on: ~S" slot-name object))
+ (t
+ (bug "Bogus slot-cell in (CAS SLOT-VALUE): ~S" cell)))))
+ (if (and (eq +slot-unbound+ old)
+ (neq old old-value))
+ (slot-unbound (wrapper-class* wrapper) object slot-name)
+ old))))
+
(defun slot-boundp (object slot-name)
- (let* ((wrapper (check-obsolete-instance/wrapper-of object))
- (cell (find-slot-cell wrapper slot-name))
+ (let* ((wrapper (valid-wrapper-of object))
+ (cell (or (find-slot-cell wrapper slot-name)
+ (return-from slot-boundp
+ (and (slot-missing (wrapper-class* wrapper) object slot-name
+ 'slot-boundp)
+ t))))
(location (car cell))
(value
(cond ((fixnump location)
(funcallable-standard-instance-access object location)))
((consp location)
(cdr location))
- ((eq t location)
- (return-from slot-boundp
- (slot-boundp-using-class (wrapper-class* wrapper) object (cddr cell))))
- ((not cell)
+ ((not location)
(return-from slot-boundp
- (and (slot-missing (wrapper-class* wrapper) object slot-name
- 'slot-boundp)
- t)))
+ (funcall (slot-info-boundp (cdr cell)) object)))
(t
(bug "Bogus slot cell in SLOT-VALUE: ~S" cell)))))
(not (eq +slot-unbound+ value))))
form))
(defun slot-makunbound (object slot-name)
- (let* ((wrapper (check-obsolete-instance/wrapper-of object))
+ (let* ((wrapper (valid-wrapper-of object))
(cell (find-slot-cell wrapper slot-name))
(location (car cell)))
(cond ((fixnump location)
+slot-unbound+)))
((consp location)
(setf (cdr location) +slot-unbound+))
- ((eq t location)
- (slot-makunbound-using-class (wrapper-class* wrapper) object (cddr cell)))
((not cell)
(slot-missing (wrapper-class* wrapper) object slot-name 'slot-makunbound))
+ ((not location)
+ (let ((class (wrapper-class* wrapper)))
+ (slot-makunbound-using-class class object (find-slot-definition class slot-name))))
(t
(bug "Bogus slot-cell in SLOT-MAKUNBOUND: ~S" cell))))
object)
;; FIXME: Do we need this? SET-SLOT-VALUE checks for obsolete
;; instances. Are users allowed to call this directly?
(check-obsolete-instance object)
- (let ((location (slot-definition-location slotd))
- (type-check-function
- (when (safe-p class)
- (slot-definition-type-check-function slotd))))
- (flet ((check (new-value)
- (when type-check-function
- (funcall (the function type-check-function) new-value))
- new-value))
- (typecase location
- (fixnum
- (cond ((std-instance-p object)
- (setf (clos-slots-ref (std-instance-slots object) location)
- (check new-value)))
- ((fsc-instance-p object)
- (setf (clos-slots-ref (fsc-instance-slots object) location)
- (check new-value)))
- (t (bug "unrecognized instance type in ~S"
- '(setf slot-value-using-class)))))
- (cons
- (setf (cdr location) (check new-value)))
- (t
- (instance-structure-protocol-error
- slotd '(setf slot-value-using-class)))))))
+ (let* ((info (slot-definition-info slotd))
+ (location (slot-definition-location slotd))
+ (typecheck (slot-info-typecheck info))
+ (new-value (if typecheck
+ (funcall (the function typecheck) new-value)
+ new-value)))
+ (typecase location
+ (fixnum
+ (cond ((std-instance-p object)
+ (setf (clos-slots-ref (std-instance-slots object) location)
+ new-value))
+ ((fsc-instance-p object)
+ (setf (clos-slots-ref (fsc-instance-slots object) location)
+ new-value))
+ (t (bug "unrecognized instance type in ~S"
+ '(setf slot-value-using-class)))))
+ (cons
+ (setf (cdr location) new-value))
+ (t
+ (instance-structure-protocol-error
+ slotd '(setf slot-value-using-class))))))
(defmethod slot-boundp-using-class
((class std-class)
((class condition-class)
(object condition)
(slotd condition-effective-slot-definition))
- (let ((fun (slot-definition-reader-function slotd)))
- (declare (type function fun))
+ (let ((fun (slot-info-reader (slot-definition-info slotd))))
(funcall fun object)))
(defmethod (setf slot-value-using-class)
(class condition-class)
(object condition)
(slotd condition-effective-slot-definition))
- (let ((fun (slot-definition-writer-function slotd)))
- (declare (type function fun))
+ (let ((fun (slot-info-writer (slot-definition-info slotd))))
(funcall fun new-value object)))
(defmethod slot-boundp-using-class
((class condition-class)
(object condition)
(slotd condition-effective-slot-definition))
- (let ((fun (slot-definition-boundp-function slotd)))
- (declare (type function fun))
+ (let ((fun (slot-info-boundp (slot-definition-info slotd))))
(funcall fun object)))
(defmethod slot-makunbound-using-class ((class condition-class) object slot)
instance
(etypecase position
(fixnum
- (nth position (wrapper-instance-slots-layout (wrapper-of instance))))
+ ;; In the vast majority of cases location corresponds to the position
+ ;; in list. The only exceptions are when there are non-local slots
+ ;; before the one we want.
+ (let* ((slots (wrapper-slots (wrapper-of instance)))
+ (guess (nth position slots)))
+ (if (eql position (slot-definition-location guess))
+ (slot-definition-name guess)
+ (slot-definition-name
+ (car (member position (class-slots instance) :key #'slot-definition-location))))))
(cons
(car position))))))
\f
;;; FIXME: AMOP says that allocate-instance imples finalize-inheritance
;;; if the class is not yet finalized, but we don't seem to be taking
-;;; care of this for non-standard-classes.x
+;;; care of this for non-standard-classes.
(defmethod allocate-instance ((class standard-class) &rest initargs)
(declare (ignore initargs))
(unless (class-finalized-p class)
(let ((constructor (class-defstruct-constructor class)))
(if constructor
(funcall constructor)
- (allocate-standard-instance (class-wrapper class)))))
+ (error "Don't know how to allocate ~S" class))))
-;;; FIXME: It would be nicer to have allocate-instance return
-;;; uninitialized objects for conditions as well.
(defmethod allocate-instance ((class condition-class) &rest initargs)
(declare (ignore initargs))
- (make-condition (class-name class)))
+ (allocate-condition (class-name class)))
(defmethod allocate-instance ((class built-in-class) &rest initargs)
(declare (ignore initargs))
(error "Cannot allocate an instance of ~S." class)) ; So sayeth AMOP
+;;; AMOP says that CLASS-SLOTS signals an error for unfinalized classes.
+(defmethod class-slots :before ((class slot-class))
+ (unless (class-finalized-p class)
+ (error 'simple-reference-error
+ :format-control "~S called on ~S, which is not yet finalized."
+ :format-arguments (list 'class-slots class)
+ :references (list '(:amop :generic-function class-slots)))))
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