(in-package "SB-PCL")
\f
-(defun ensure-accessor (type fun-name slot-name)
- (unless (fboundp fun-name)
- (multiple-value-bind (lambda-list specializers method-class initargs doc)
- (ecase type
- ;; FIXME: change SLOT-OBJECT here to T to get SLOT-MISSING
- ;; behaviour for non-slot-objects too?
- (reader
- (values '(object) '(slot-object) 'global-reader-method
- (make-std-reader-method-function 'slot-object slot-name)
- "automatically-generated reader method"))
- (writer
- (values '(new-value object) '(t slot-object) 'global-writer-method
- (make-std-writer-method-function 'slot-object slot-name)
- "automatically-generated writer method"))
- (boundp
- (values '(object) '(slot-object) 'global-boundp-method
- (make-std-boundp-method-function 'slot-object slot-name)
- "automatically-generated boundp method")))
- (let ((gf (ensure-generic-function fun-name :lambda-list lambda-list)))
- (add-method gf (make-a-method method-class
- () lambda-list specializers
- initargs doc :slot-name slot-name)))))
- t)
+(let ((reader-specializers '(slot-object))
+ (writer-specializers '(t slot-object)))
+ (defun ensure-accessor (type fun-name slot-name)
+ (unless (fboundp fun-name)
+ (multiple-value-bind (lambda-list specializers method-class initargs doc)
+ (ecase type
+ ;; FIXME: change SLOT-OBJECT here to T to get SLOT-MISSING
+ ;; behaviour for non-slot-objects too?
+ (reader
+ (values '(object) reader-specializers 'global-reader-method
+ (make-std-reader-method-function 'slot-object slot-name)
+ "automatically-generated reader method"))
+ (writer
+ (values '(new-value object) writer-specializers
+ 'global-writer-method
+ (make-std-writer-method-function 'slot-object slot-name)
+ "automatically-generated writer method"))
+ (boundp
+ (values '(object) reader-specializers 'global-boundp-method
+ (make-std-boundp-method-function 'slot-object slot-name)
+ "automatically-generated boundp method")))
+ (let ((gf (ensure-generic-function fun-name :lambda-list lambda-list)))
+ (add-method gf (make-a-method method-class
+ () lambda-list specializers
+ initargs doc :slot-name slot-name)))))
+ t)
+ ;; KLUDGE: this is maybe PCL bootstrap mechanism #6 or #7, invented
+ ;; by CSR in June 2007. Making the bootstrap sane is getting higher
+ ;; on the "TODO: URGENT" list.
+ (defun !fix-ensure-accessor-specializers ()
+ (setf reader-specializers (mapcar #'find-class reader-specializers))
+ (setf writer-specializers (mapcar #'find-class writer-specializers))))
-(defmacro accessor-slot-value (object slot-name)
- (aver (constantp slot-name))
- (let* ((slot-name (constant-form-value slot-name))
+(defmacro accessor-slot-value (object slot-name &environment env)
+ (aver (constantp slot-name env))
+ (let* ((slot-name (constant-form-value slot-name env))
(reader-name (slot-reader-name slot-name)))
`(let ((.ignore. (load-time-value
(ensure-accessor 'reader ',reader-name ',slot-name))))
(funcall #',reader-name ,object)))))
(defmacro accessor-set-slot-value (object slot-name new-value &environment env)
- (aver (constantp slot-name))
+ (aver (constantp slot-name env))
(setq object (macroexpand object env))
- (setq slot-name (macroexpand slot-name env))
- (let* ((slot-name (constant-form-value slot-name))
- (bindings (unless (or (constantp new-value) (atom new-value))
- (let ((object-var (gensym)))
- (prog1 `((,object-var ,object))
- (setq object object-var)))))
+ (let* ((slot-name (constant-form-value slot-name env))
+ (bind-object (unless (or (constantp new-value env) (atom new-value))
+ (let* ((object-var (gensym))
+ (bind `((,object-var ,object))))
+ (setf object object-var)
+ bind)))
(writer-name (slot-writer-name slot-name))
(form
`(let ((.ignore.
(declare (ignore .ignore.))
(funcall #',writer-name .new-value. ,object)
.new-value.)))
- (if bindings
- `(let ,bindings ,form)
+ (if bind-object
+ `(let ,bind-object ,form)
form)))
-(defmacro accessor-slot-boundp (object slot-name)
- (aver (constantp slot-name))
- (let* ((slot-name (constant-form-value slot-name))
+(defmacro accessor-slot-boundp (object slot-name &environment env)
+ (aver (constantp slot-name env))
+ (let* ((slot-name (constant-form-value slot-name env))
(boundp-name (slot-boundp-name slot-name)))
`(let ((.ignore. (load-time-value
(ensure-accessor 'boundp ',boundp-name ',slot-name))))
(defun make-optimized-std-writer-method-function
(fsc-p slotd slot-name location)
(declare #.*optimize-speed*)
- (set-fun-name
- (etypecase location
- (fixnum (if fsc-p
- (lambda (nv instance)
- (check-obsolete-instance instance)
- (setf (clos-slots-ref (fsc-instance-slots instance)
- location)
- nv))
- (lambda (nv instance)
- (check-obsolete-instance instance)
- (setf (clos-slots-ref (std-instance-slots instance)
- location)
- nv))))
- (cons (lambda (nv instance)
- (check-obsolete-instance instance)
- (setf (cdr location) nv)))
- (null
- (lambda (nv instance)
- (declare (ignore nv))
- (instance-structure-protocol-error slotd
- '(setf slot-value-using-class)))))
- `(writer ,slot-name)))
+ (let* ((safe-p (and slotd
+ (slot-definition-class slotd)
+ (safe-p (slot-definition-class slotd))))
+ (writer-fun (etypecase location
+ (fixnum (if fsc-p
+ (lambda (nv instance)
+ (check-obsolete-instance instance)
+ (setf (clos-slots-ref (fsc-instance-slots instance)
+ location)
+ nv))
+ (lambda (nv instance)
+ (check-obsolete-instance instance)
+ (setf (clos-slots-ref (std-instance-slots instance)
+ location)
+ nv))))
+ (cons (lambda (nv instance)
+ (check-obsolete-instance instance)
+ (setf (cdr location) nv)))
+ (null
+ (lambda (nv instance)
+ (declare (ignore nv instance))
+ (instance-structure-protocol-error
+ slotd
+ '(setf slot-value-using-class))))))
+ (checking-fun (lambda (new-value instance)
+ (check-obsolete-instance instance)
+ ;; If the SLOTD had a TYPE-CHECK-FUNCTION, call it.
+ (let* (;; Note that this CLASS is not neccessarily
+ ;; the SLOT-DEFINITION-CLASS of the
+ ;; SLOTD passed to M-O-S-W-M-F, since it's
+ ;; e.g. possible for a subclass to define
+ ;; a slot of the same name but with no
+ ;; accessors. So we need to fetch the SLOTD
+ ;; when CHECKING-FUN is called, instead of
+ ;; just closing over it.
+ (class (class-of instance))
+ (slotd (find-slot-definition class slot-name))
+ (type-check-function
+ (when slotd
+ (slot-definition-type-check-function slotd))))
+ (when type-check-function
+ (funcall type-check-function new-value)))
+ ;; Then call the real writer.
+ (funcall writer-fun new-value instance))))
+ (set-fun-name (if safe-p
+ checking-fun
+ writer-fun)
+ `(writer ,slot-name))))
(defun make-optimized-std-boundp-method-function
(fsc-p slotd slot-name location)
(defun make-optimized-std-setf-slot-value-using-class-method-function
(fsc-p slotd)
(declare #.*optimize-speed*)
- (let ((location (slot-definition-location slotd)))
- (etypecase location
- (fixnum
- (if fsc-p
- (lambda (nv class instance slotd)
- (declare (ignore class slotd))
- (check-obsolete-instance instance)
- (setf (clos-slots-ref (fsc-instance-slots instance) location)
- nv))
- (lambda (nv class instance slotd)
- (declare (ignore class slotd))
- (check-obsolete-instance instance)
- (setf (clos-slots-ref (std-instance-slots instance) location)
- nv))))
- (cons (lambda (nv class instance slotd)
- (declare (ignore class slotd))
- (check-obsolete-instance instance)
- (setf (cdr location) nv)))
- (null (lambda (nv class instance slotd)
- (declare (ignore nv class instance))
- (instance-structure-protocol-error
- slotd '(setf slot-value-using-class)))))))
+ (let ((location (slot-definition-location slotd))
+ (type-check-function
+ (when (and slotd
+ (slot-definition-class slotd)
+ (safe-p (slot-definition-class slotd)))
+ (slot-definition-type-check-function slotd))))
+ (macrolet ((make-mf-lambda (&body body)
+ `(lambda (nv class instance slotd)
+ (declare (ignore class slotd))
+ (check-obsolete-instance instance)
+ ,@body))
+ (make-mf-lambdas (&body body)
+ ;; Having separate lambdas for the NULL / not-NULL cases of
+ ;; TYPE-CHECK-FUNCTION is done to avoid runtime overhead
+ ;; for CLOS typechecking when it's not in use.
+ `(if type-check-function
+ (make-mf-lambda
+ (funcall (the function type-check-function) nv)
+ ,@body)
+ (make-mf-lambda
+ ,@body))))
+ (etypecase location
+ (fixnum
+ (if fsc-p
+ (make-mf-lambdas
+ (setf (clos-slots-ref (fsc-instance-slots instance) location)
+ nv))
+ (make-mf-lambdas
+ (setf (clos-slots-ref (std-instance-slots instance) location)
+ nv))))
+ (cons
+ (make-mf-lambdas (setf (cdr location) nv)))
+ (null (lambda (nv class instance slotd)
+ (declare (ignore nv class instance))
+ (instance-structure-protocol-error
+ slotd '(setf slot-value-using-class))))))))
(defun make-optimized-std-slot-boundp-using-class-method-function
(fsc-p slotd)
(defun get-accessor-from-svuc-method-function (class slotd sdfun name)
(macrolet ((emf-funcall (emf &rest args)
- `(invoke-effective-method-function ,emf nil ,@args)))
+ `(invoke-effective-method-function ,emf nil
+ :required-args ,args)))
(set-fun-name
(case name
(reader (lambda (instance)
(boundp (lambda (instance)
(emf-funcall sdfun class instance slotd))))
`(,name ,(class-name class) ,(slot-definition-name slotd)))))
-
-(defun make-internal-reader-method-function (class-name slot-name)
- (list* :method-spec `(internal-reader-method ,class-name ,slot-name)
- (make-method-function
- (lambda (instance)
- (let ((wrapper (get-instance-wrapper-or-nil instance)))
- (if wrapper
- (let* ((class (wrapper-class* wrapper))
- (index (or (instance-slot-index wrapper slot-name)
- (assq slot-name
- (wrapper-class-slots wrapper)))))
- (typecase index
- (fixnum
- (let ((value (clos-slots-ref (get-slots instance)
- index)))
- (if (eq value +slot-unbound+)
- (values (slot-unbound (class-of instance)
- instance
- slot-name))
- value)))
- (cons
- (let ((value (cdr index)))
- (if (eq value +slot-unbound+)
- (values (slot-unbound (class-of instance)
- instance
- slot-name))
- value)))
- (t
- (error "~@<The wrapper for class ~S does not have ~
- the slot ~S~@:>"
- class slot-name))))
- (slot-value instance slot-name)))))))
\f
-(defun make-std-reader-method-function (class-name slot-name)
+(defun make-std-reader-method-function (class-or-name slot-name)
+ (declare (ignore class-or-name))
(let* ((initargs (copy-tree
(make-method-function
(lambda (instance)
(instance-read-internal
.pv. instance-slots 0
(slot-value instance slot-name))))))))
- (setf (getf (getf initargs :plist) :slot-name-lists)
+ (setf (getf (getf initargs 'plist) :slot-name-lists)
(list (list nil slot-name)))
- (list* :method-spec `(reader-method ,class-name ,slot-name)
- initargs)))
+ initargs))
-(defun make-std-writer-method-function (class-name slot-name)
- (let* ((initargs (copy-tree
- (make-method-function
- (lambda (nv instance)
- (pv-binding1 (.pv. .calls.
- (bug "Please report this")
- (instance) (instance-slots))
- (instance-write-internal
- .pv. instance-slots 0 nv
- (setf (slot-value instance slot-name) nv))))))))
- (setf (getf (getf initargs :plist) :slot-name-lists)
+(defun make-std-writer-method-function (class-or-name slot-name)
+ (let* ((class (when (eq *boot-state* 'complete)
+ (if (typep class-or-name 'class)
+ class-or-name
+ (find-class class-or-name nil))))
+ (safe-p (and class
+ (safe-p class)))
+ (check-fun (lambda (new-value instance)
+ (let* ((class (class-of instance))
+ (slotd (find-slot-definition class slot-name))
+ (type-check-function
+ (when slotd
+ (slot-definition-type-check-function slotd))))
+ (when type-check-function
+ (funcall type-check-function new-value)))))
+ (initargs (copy-tree
+ (if safe-p
+ (make-method-function
+ (lambda (nv instance)
+ (funcall check-fun nv instance)
+ (pv-binding1 (.pv. .calls.
+ (bug "Please report this")
+ (instance) (instance-slots))
+ (instance-write-internal
+ .pv. instance-slots 0 nv
+ (setf (slot-value instance slot-name) nv)))))
+ (make-method-function
+ (lambda (nv instance)
+ (pv-binding1 (.pv. .calls.
+ (bug "Please report this")
+ (instance) (instance-slots))
+ (instance-write-internal
+ .pv. instance-slots 0 nv
+ (setf (slot-value instance slot-name) nv)))))))))
+ (setf (getf (getf initargs 'plist) :slot-name-lists)
(list nil (list nil slot-name)))
- (list* :method-spec `(writer-method ,class-name ,slot-name)
- initargs)))
+ initargs))
-(defun make-std-boundp-method-function (class-name slot-name)
+(defun make-std-boundp-method-function (class-or-name slot-name)
+ (declare (ignore class-or-name))
(let* ((initargs (copy-tree
(make-method-function
(lambda (instance)
(instance-boundp-internal
.pv. instance-slots 0
(slot-boundp instance slot-name))))))))
- (setf (getf (getf initargs :plist) :slot-name-lists)
+ (setf (getf (getf initargs 'plist) :slot-name-lists)
(list (list nil slot-name)))
- (list* :method-spec `(boundp-method ,class-name ,slot-name)
- initargs)))
+ initargs))
+\f
+;;;; FINDING SLOT DEFINITIONS
+;;;
+;;; Historical PCL found slot definitions by iterating over
+;;; CLASS-SLOTS, which is O(N) for number of slots, and moreover
+;;; requires a GF call (for SLOT-DEFINITION-NAME) for each slot in
+;;; list up to the desired one.
+;;;
+;;; Current SBCL hashes the effective slot definitions, and some
+;;; information pulled out from them into a simple-vector, with bucket
+;;; chains made out of plists keyed by the slot names. This fixes
+;;; gives O(1) performance, and avoid the GF calls.
+;;;
+;;; MAKE-SLOT-VECTOR constructs the hashed vector out of a list of
+;;; effective slot definitions and the class they pertain to, and
+;;; FIND-SLOT-DEFINITION knows how to look up slots in that vector.
+;;;
+;;; The only bit of cleverness in the implementation is to make the
+;;; vectors fairly tight, but always longer then 0 elements:
+;;;
+;;; -- We don't want to waste huge amounts of space no these vectors,
+;;; which are mostly required by things like SLOT-VALUE with a
+;;; variable slot name, so a constant extension over the minimum
+;;; size seems like a good choise.
+;;;
+;;; -- As long as the vector always has a length > 0
+;;; FIND-SLOT-DEFINITION doesn't need to handle the rare case of an
+;;; empty vector separately: it just returns a NIL.
+;;;
+;;; In addition to the slot-definition we also store the slot-location
+;;; and type-check function for instances of standard metaclasses, so
+;;; that SLOT-VALUE &co using variable slot names can get at them
+;;; without additional GF calls.
+;;;
+;;; Notes:
+;;; It would be probably better to store the vector in wrapper
+;;; instead: one less memory indirection, one less CLOS slot
+;;; access to get at it.
+;;;
+;;; It would also be nice to have STANDARD-INSTANCE-STRUCTURE-P
+;;; generic instead of checking versus STANDARD-CLASS and
+;;; FUNCALLABLE-STANDARD-CLASS.
+
+(defun find-slot-definition (class slot-name)
+ (declare (symbol slot-name))
+ (let* ((vector (class-slot-table class))
+ (index (rem (sxhash slot-name) (length vector))))
+ (declare (simple-vector vector) (index index)
+ (optimize (sb-c::insert-array-bounds-checks 0)))
+ (do ((plist (the list (svref vector index)) (cdr plist)))
+ ((not (consp plist)))
+ (let ((key (car plist)))
+ (setf plist (cdr plist))
+ (when (eq key slot-name)
+ (return (cddar plist)))))))
+
+(defun find-slot-cell (class slot-name)
+ (declare (symbol slot-name))
+ (let* ((vector (class-slot-table class))
+ (index (rem (sxhash slot-name) (length vector))))
+ (declare (simple-vector vector) (index index)
+ (optimize (sb-c::insert-array-bounds-checks 0)))
+ (do ((plist (the list (svref vector index)) (cdr plist)))
+ ((not (consp plist)))
+ (let ((key (car plist)))
+ (setf plist (cdr plist))
+ (when (eq key slot-name)
+ (return (car plist)))))))
+
+(defun make-slot-table (class slots)
+ (let* ((n (+ (length slots) 2))
+ (vector (make-array n :initial-element nil))
+ (save-slot-location-p
+ (when (eq 'complete *boot-state*)
+ (let ((metaclass (class-of class)))
+ (or (eq metaclass *the-class-standard-class*)
+ (eq metaclass *the-class-funcallable-standard-class*)))))
+ (save-type-check-function-p (and save-slot-location-p (safe-p class))))
+ (flet ((add-to-vector (name slot)
+ (declare (symbol name)
+ (optimize (sb-c::insert-array-bounds-checks 0)))
+ (let ((index (rem (sxhash name) n)))
+ (setf (svref vector index)
+ (list* name (list* (if save-slot-location-p
+ (slot-definition-location slot)
+ ;; T tells SLOT-VALUE & SET-SLOT-VALUE
+ ;; that this is a non-standard class.
+ t)
+ (when save-type-check-function-p
+ (slot-definition-type-check-function slot))
+ slot)
+ (svref vector index))))))
+ (if (eq 'complete *boot-state*)
+ (dolist (slot slots)
+ (add-to-vector (slot-definition-name slot) slot))
+ (dolist (slot slots)
+ (add-to-vector (early-slot-definition-name slot) slot))))
+ vector))
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