1 ;;;; permutation vectors
3 ;;;; This software is part of the SBCL system. See the README file for
6 ;;;; This software is derived from software originally released by Xerox
7 ;;;; Corporation. Copyright and release statements follow. Later modifications
8 ;;;; to the software are in the public domain and are provided with
9 ;;;; absolutely no warranty. See the COPYING and CREDITS files for more
12 ;;;; copyright information from original PCL sources:
14 ;;;; Copyright (c) 1985, 1986, 1987, 1988, 1989, 1990 Xerox Corporation.
15 ;;;; All rights reserved.
17 ;;;; Use and copying of this software and preparation of derivative works based
18 ;;;; upon this software are permitted. Any distribution of this software or
19 ;;;; derivative works must comply with all applicable United States export
22 ;;;; This software is made available AS IS, and Xerox Corporation makes no
23 ;;;; warranty about the software, its performance or its conformity to any
28 (defmacro instance-slot-index (wrapper slot-name)
30 (declare (fixnum pos))
32 (dolist (sn (wrapper-instance-slots-layout ,wrapper))
33 (when (eq ,slot-name sn) (return-from loop pos))
36 (defun pv-cache-limit-fn (nlines)
37 (default-limit-fn nlines))
39 (defstruct (pv-table (:predicate pv-tablep)
40 (:constructor make-pv-table-internal
41 (slot-name-lists call-list))
43 (cache nil :type (or cache null))
44 (pv-size 0 :type fixnum)
45 (slot-name-lists nil :type list)
46 (call-list nil :type list))
48 #-sb-fluid (declaim (sb-ext:freeze-type pv-table))
50 ;;; FIXME: The comment below seem to indicate that this was intended
51 ;;; to be actually used, however, it isn't anymore, and was commented
52 ;;; out at 0.9.13.47. Also removed was code in MAKE-PV-TABLE that
53 ;;; pushed each new PV-TABLE onto this list. --NS 2006-06-18
55 ;;; help new slot-value-using-class methods affect fast iv access
57 ;;; (defvar *all-pv-table-list* nil)
59 (declaim (inline make-pv-table))
60 (defun make-pv-table (&key slot-name-lists call-list)
61 (make-pv-table-internal slot-name-lists call-list))
63 (defun make-pv-table-type-declaration (var)
64 `(type pv-table ,var))
66 (defvar *slot-name-lists-inner* (make-hash-table :test 'equal))
67 (defvar *slot-name-lists-outer* (make-hash-table :test 'equal))
69 ;;; Entries in this are lists of (table . pv-offset-list).
70 (defvar *pv-key-to-pv-table-table* (make-hash-table :test 'equal))
72 (defun intern-pv-table (&key slot-name-lists call-list)
75 (or (gethash x *slot-name-lists-inner*)
76 (setf (gethash x *slot-name-lists-inner*) (copy-list x))))
78 (or (gethash x *slot-name-lists-outer*)
79 (setf (gethash x *slot-name-lists-outer*)
80 (let ((snl (copy-list (cdr x)))
83 (make-pv-table :slot-name-lists snl
86 (outer (mapcar #'inner (cons call-list slot-name-lists)))))
89 (dolist (slot-name-list slot-name-lists)
90 (dolist (slot-name (cdr slot-name-list))
91 (note-pv-table-reference slot-name pv-index pv-table)
93 (dolist (gf-call call-list)
94 (note-pv-table-reference gf-call pv-index pv-table)
96 (setf (pv-table-pv-size pv-table) pv-index)))
99 (defun note-pv-table-reference (ref pv-offset pv-table)
100 (let ((entry (gethash ref *pv-key-to-pv-table-table*)))
102 (let ((table-entry (assq pv-table entry)))
103 (when (and (null table-entry)
104 (> (length entry) 8))
105 (let ((new-table-table (make-hash-table :size 16 :test 'eq)))
106 (dolist (table-entry entry)
107 (setf (gethash (car table-entry) new-table-table)
109 (setf (gethash ref *pv-key-to-pv-table-table*) new-table-table)))
111 (if (null table-entry)
112 (let ((new (cons pv-table pv-offset)))
114 (push new (cdr entry))
115 (setf (gethash ref *pv-key-to-pv-table-table*)
117 (push pv-offset (cdr table-entry)))
118 (return-from note-pv-table-reference nil))))
119 (let ((list (gethash pv-table entry)))
121 (push pv-offset (cdr list))
122 (setf (gethash pv-table entry) (list pv-offset)))))
125 (defun map-pv-table-references-of (ref function)
126 (let ((entry (gethash ref *pv-key-to-pv-table-table*)))
128 (dolist (table+pv-offset-list entry)
130 (car table+pv-offset-list)
131 (cdr table+pv-offset-list)))
132 (maphash function entry)))
135 (defun optimize-slot-value-by-class-p (class slot-name type)
136 (or (not (eq *boot-state* 'complete))
137 (let ((slotd (find-slot-definition class slot-name)))
139 (slot-accessor-std-p slotd type)))))
141 (defun compute-pv-slot (slot-name wrapper class class-slots)
142 (if (symbolp slot-name)
143 (when (optimize-slot-value-by-class-p class slot-name 'all)
144 (or (instance-slot-index wrapper slot-name)
145 (assq slot-name class-slots)))
146 (when (consp slot-name)
147 (case (first slot-name)
149 (when (eq *boot-state* 'complete)
150 (let ((gf (gdefinition (second slot-name))))
151 (when (generic-function-p gf)
152 (accessor-values1 gf (first slot-name) class)))))
153 (t (bug "Don't know how to deal with ~S in ~S"
154 slot-name 'compute-pv-slots))))))
156 (defun compute-pv (slot-name-lists wrappers)
157 (unless (listp wrappers)
158 (setq wrappers (list wrappers)))
160 (dolist (slot-names slot-name-lists
161 (make-permutation-vector (nreverse elements)))
163 (let* ((wrapper (pop wrappers))
164 (std-p (typep wrapper 'wrapper))
165 (class (wrapper-class* wrapper))
166 (class-slots (and std-p (wrapper-class-slots wrapper))))
167 (dolist (slot-name (cdr slot-names))
169 (compute-pv-slot slot-name wrapper class class-slots)
173 (defun compute-calls (call-list wrappers)
174 (declare (ignore call-list wrappers))
178 (compute-emf-from-wrappers call wrappers))
183 #|| ; Need to finish this, then write the maintenance functions.
184 (defun compute-emf-from-wrappers (call wrappers)
186 (destructuring-bind (gf-name nreq restp arg-info) call
187 (if (eq gf-name 'make-instance)
188 (error "should not get here") ; there is another mechanism for this.
190 (if (not (eq *boot-state* 'complete))
191 (apply (gdefinition gf-name) args)
192 (let* ((gf (gdefinition gf-name))
193 (arg-info (arg-info-reader gf))
196 (emf (cache-miss-values-internal gf arg-info
197 wrappers classes types
199 (update-all-pv-tables call wrappers emf)
200 (invoke-emf emf args))))))))
203 (defun make-permutation-vector (indexes)
204 (make-array (length indexes) :initial-contents indexes))
206 (defun pv-table-lookup (pv-table pv-wrappers)
207 (let* ((slot-name-lists (pv-table-slot-name-lists pv-table))
208 (call-list (pv-table-call-list pv-table))
209 (cache (or (pv-table-cache pv-table)
210 (setf (pv-table-cache pv-table)
211 (get-cache (- (length slot-name-lists)
212 (count nil slot-name-lists))
216 (or (probe-cache cache pv-wrappers)
217 (let* ((pv (compute-pv slot-name-lists pv-wrappers))
218 (calls (compute-calls call-list pv-wrappers))
219 (pv-cell (cons pv calls))
220 (new-cache (fill-cache cache pv-wrappers pv-cell)))
221 (unless (eq new-cache cache)
222 (setf (pv-table-cache pv-table) new-cache))
225 (defun make-pv-type-declaration (var)
226 `(type simple-vector ,var))
228 (defmacro pvref (pv index)
231 (defmacro copy-pv (pv)
234 (defun make-calls-type-declaration (var)
235 `(type simple-vector ,var))
237 (defmacro callsref (calls index)
238 `(svref ,calls ,index))
240 (defvar *pv-table-cache-update-info* nil)
242 (defun update-pv-table-cache-info (class)
243 (let ((slot-names-for-pv-table-update nil)
245 (dolist (icu *pv-table-cache-update-info*)
246 (if (eq (car icu) class)
247 (pushnew (cdr icu) slot-names-for-pv-table-update)
248 (push icu new-icui)))
249 (setq *pv-table-cache-update-info* new-icui)
250 (when slot-names-for-pv-table-update
251 (update-all-pv-table-caches class slot-names-for-pv-table-update))))
253 (defun update-all-pv-table-caches (class slot-names)
254 (let* ((cwrapper (class-wrapper class))
255 (std-p (typep cwrapper 'wrapper))
256 (class-slots (and std-p (wrapper-class-slots cwrapper)))
262 (compute-pv-slot slot-name cwrapper class class-slots)
266 (dolist (slot-name slot-names)
267 (map-pv-table-references-of
269 (lambda (pv-table pv-offset-list)
270 (declare (ignore pv-offset-list))
271 (pushnew pv-table pv-tables))))
272 (dolist (pv-table pv-tables)
273 (let* ((cache (pv-table-cache pv-table))
274 (slot-name-lists (pv-table-slot-name-lists pv-table))
275 (pv-size (pv-table-pv-size pv-table))
276 (pv-map (make-array pv-size :initial-element nil)))
277 (let ((map-index 0) (param-index 0))
278 (dolist (slot-name-list slot-name-lists)
279 (dolist (slot-name (cdr slot-name-list))
280 (let ((a (assoc slot-name new-values)))
281 (setf (svref pv-map map-index)
282 (and a (cons param-index (cdr a)))))
286 (map-cache (lambda (wrappers pv-cell)
287 (update-slots-in-pv wrappers (car pv-cell)
288 cwrapper pv-size pv-map))
291 (defun update-slots-in-pv (wrappers pv cwrapper pv-size pv-map)
293 (when (eq cwrapper wrappers)
294 (dotimes-fixnum (i pv-size)
295 (let ((map (svref pv-map i)))
297 (aver (= (car map) 0))
298 (setf (pvref pv i) (cdr map))))))
299 (when (memq cwrapper wrappers)
301 (dolist (wrapper wrappers)
302 (when (eq wrapper cwrapper)
303 (dotimes-fixnum (i pv-size)
304 (let ((map (svref pv-map i)))
305 (when (and map (= (car map) param))
306 (setf (pvref pv i) (cdr map))))))
309 (defun can-optimize-access (form required-parameters env)
310 (let ((type (ecase (car form)
312 (set-slot-value 'writer)
313 (slot-boundp 'boundp)))
315 (slot-name (eval (caddr form)))) ; known to be constant
316 (can-optimize-access1 var required-parameters env type slot-name)))
318 ;;; FIXME: This looks like an internal helper function for
319 ;;; CAN-OPTIMIZE-ACCESS, and it is used that way, but it's also called
320 ;;; bare from several places in the code. Perhaps the two functions
321 ;;; should be renamed CAN-OPTIMIZE-ACCESS-FOR-FORM and
322 ;;; CAN-OPTIMIZE-ACCESS-FOR-VAR. If so, I'd just as soon use keyword
323 ;;; args instead of optional ones, too.
324 (defun can-optimize-access1 (var required-parameters env
325 &optional type slot-name)
326 (when (and (consp var) (eq 'the (car var)))
327 ;; FIXME: We should assert list of length 3 here. Or maybe we
328 ;; should just define EXTRACT-THE, replace the whole
331 ;; (AWHEN (EXTRACT-THE VAR)
333 ;; and then use EXTRACT-THE similarly to clean up the other tests
334 ;; against 'THE scattered through the PCL code.
335 (setq var (caddr var)))
337 (let* ((rebound? (caddr (var-declaration '%variable-rebinding var env)))
338 (parameter-or-nil (car (memq (or rebound? var)
339 required-parameters))))
340 (when parameter-or-nil
341 (let* ((class-name (caddr (var-declaration '%class
344 (class (find-class class-name nil)))
345 (when (or (not (eq *boot-state* 'complete))
346 (and class (not (class-finalized-p class))))
348 (when (and class-name (not (eq class-name t)))
349 (when (or (null type)
351 (memq *the-class-structure-object*
352 (class-precedence-list class))))
353 (optimize-slot-value-by-class-p class slot-name type))
354 (cons parameter-or-nil (or class class-name)))))))))
356 ;;; Check whether the binding of the named variable is modified in the
358 (defun parameter-modified-p (parameter-name env)
359 (let ((modified-variables (macroexpand '%parameter-binding-modified env)))
360 (memq parameter-name modified-variables)))
362 (defun optimize-slot-value (slots sparameter form)
364 (let ((optimized-form
365 (destructuring-bind (ignore1 ignore2 slot-name-form) form
366 (declare (ignore ignore1 ignore2))
367 (let ((slot-name (eval slot-name-form)))
368 (optimize-instance-access slots :read sparameter
370 ;; We don't return the optimized form directly, since there's
371 ;; still a chance that we'll find out later on that the
372 ;; optimization should not have been done, for example due to
373 ;; the walker encountering a SETQ on SPARAMETER later on in
374 ;; the body [ see for example clos.impure.lisp test with :name
375 ;; ((:setq :method-parameter) slot-value)) ]. Instead we defer
376 ;; the decision until the compiler macroexpands
377 ;; OPTIMIZED-SLOT-VALUE.
379 ;; Note that we must still call OPTIMIZE-INSTANCE-ACCESS at
380 ;; this point (instead of when expanding
381 ;; OPTIMIZED-SLOT-VALUE), since it mutates the structure of
382 ;; SLOTS. If that mutation isn't done during the walking,
383 ;; MAKE-METHOD-LAMBDA-INTERNAL won't wrap a correct PV-BINDING
384 ;; form around the body, and compilation will fail. -- JES,
386 `(optimized-slot-value ,form ,(car sparameter) ,optimized-form))
387 `(accessor-slot-value ,@(cdr form))))
389 (defmacro optimized-slot-value (form parameter-name optimized-form
391 ;; Either use OPTIMIZED-FORM or fall back to the safe
392 ;; ACCESSOR-SLOT-VALUE.
393 (if (parameter-modified-p parameter-name env)
394 `(accessor-slot-value ,@(cdr form))
397 (defun optimize-set-slot-value (slots sparameter form)
399 (let ((optimized-form
400 (destructuring-bind (ignore1 ignore2 slot-name-form new-value) form
401 (declare (ignore ignore1 ignore2))
402 (let ((slot-name (eval slot-name-form)))
403 (optimize-instance-access slots
408 ;; See OPTIMIZE-SLOT-VALUE
409 `(optimized-set-slot-value ,form ,(car sparameter) ,optimized-form))
410 `(accessor-set-slot-value ,@(cdr form))))
412 (defmacro optimized-set-slot-value (form parameter-name optimized-form
414 (cond ((safe-code-p env)
415 ;; Don't optimize slot value setting in safe code, since the
416 ;; optimized version will fail to catch some type errors
417 ;; (for example when a subclass declares a tighter type for
418 ;; the slot than a superclass).
419 `(safe-set-slot-value ,@(cdr form)))
420 ((parameter-modified-p parameter-name env)
421 `(accessor-set-slot-value ,@(cdr form)))
425 (defun optimize-slot-boundp (slots sparameter form)
427 (let ((optimized-form
429 ;; FIXME: In CMU CL ca. 19991205, this binding list
430 ;; had a fourth element in it, NEW-VALUE. It's hard
431 ;; to see how that could possibly be right, since
432 ;; SLOT-BOUNDP has no NEW-VALUE. Since it was
433 ;; causing a failure in building PCL for SBCL, so I
434 ;; changed it to match the definition of
435 ;; SLOT-BOUNDP (and also to match the list used in
436 ;; the similar OPTIMIZE-SLOT-VALUE,
437 ;; above). However, I'm weirded out by this, since
438 ;; this is old code which has worked for ages to
439 ;; build PCL for CMU CL, so it's hard to see why it
440 ;; should need a patch like this in order to build
441 ;; PCL for SBCL. I'd like to return to this and
442 ;; find a test case which exercises this function
443 ;; both in CMU CL, to see whether it's really a
444 ;; previously-unexercised bug or whether I've
445 ;; misunderstood something (and, presumably,
446 ;; patched it wrong).
447 (slot-boundp-symbol instance slot-name-form)
449 (declare (ignore slot-boundp-symbol instance))
450 (let ((slot-name (eval slot-name-form)))
451 (optimize-instance-access slots
456 ;; See OPTIMIZE-SLOT-VALUE
457 `(optimized-slot-boundp ,form ,(car sparameter) ,optimized-form))
458 `(accessor-slot-boundp ,@(cdr form))))
460 (defmacro optimized-slot-boundp (form parameter-name optimized-form
462 (if (parameter-modified-p parameter-name env)
463 `(accessor-slot-boundp ,@(cdr form))
466 ;;; The SLOTS argument is an alist, the CAR of each entry is the name
467 ;;; of a required parameter to the function. The alist is in order, so
468 ;;; the position of an entry in the alist corresponds to the
469 ;;; argument's position in the lambda list.
470 (defun optimize-instance-access (slots
475 (let ((class (if (consp sparameter) (cdr sparameter) *the-class-t*))
476 (parameter (if (consp sparameter) (car sparameter) sparameter)))
477 (if (and (eq *boot-state* 'complete)
479 (memq *the-class-structure-object* (class-precedence-list class)))
480 (let ((slotd (find-slot-definition class slot-name)))
483 `(,(slot-definition-defstruct-accessor-symbol slotd) ,parameter))
485 `(setf (,(slot-definition-defstruct-accessor-symbol slotd)
490 (let* ((parameter-entry (assq parameter slots))
491 (slot-entry (assq slot-name (cdr parameter-entry)))
492 (position (posq parameter-entry slots))
493 (pv-offset-form (list 'pv-offset ''.PV-OFFSET.)))
494 (unless parameter-entry
495 (bug "slot optimization bewilderment: O-I-A"))
497 (setq slot-entry (list slot-name))
498 (push slot-entry (cdr parameter-entry)))
499 (push pv-offset-form (cdr slot-entry))
502 `(instance-read ,pv-offset-form ,parameter ,position
503 ',slot-name ',class))
505 `(let ((.new-value. ,new-value))
506 (instance-write ,pv-offset-form ,parameter ,position
507 ',slot-name ',class .new-value.)))
509 `(instance-boundp ,pv-offset-form ,parameter ,position
510 ',slot-name ',class)))))))
512 (define-walker-template pv-offset) ; These forms get munged by mutate slots.
513 (defmacro pv-offset (arg) arg)
514 (define-walker-template instance-accessor-parameter)
515 (defmacro instance-accessor-parameter (x) x)
517 ;;; It is safe for these two functions to be wrong. They just try to
518 ;;; guess what the most likely case will be.
519 (defun generate-fast-class-slot-access-p (class-form slot-name-form)
520 (let ((class (and (constantp class-form) (constant-form-value class-form)))
521 (slot-name (and (constantp slot-name-form)
522 (constant-form-value slot-name-form))))
523 (and (eq *boot-state* 'complete)
524 (standard-class-p class)
525 (not (eq class *the-class-t*)) ; shouldn't happen, though.
526 (let ((slotd (find-slot-definition class slot-name)))
527 (and slotd (eq :class (slot-definition-allocation slotd)))))))
529 (defun skip-fast-slot-access-p (class-form slot-name-form type)
530 (let ((class (and (constantp class-form) (constant-form-value class-form)))
531 (slot-name (and (constantp slot-name-form)
532 (constant-form-value slot-name-form))))
533 (and (eq *boot-state* 'complete)
534 (standard-class-p class)
535 (not (eq class *the-class-t*)) ; shouldn't happen, though.
536 (let ((slotd (find-slot-definition class slot-name)))
537 (and slotd (skip-optimize-slot-value-by-class-p class
541 (defun skip-optimize-slot-value-by-class-p (class slot-name type)
542 (let ((slotd (find-slot-definition class slot-name)))
544 (eq *boot-state* 'complete)
545 (not (slot-accessor-std-p slotd type)))))
547 (defmacro instance-read-internal (pv slots pv-offset default &optional kind)
548 (unless (member kind '(nil :instance :class :default))
549 (error "illegal kind argument to ~S: ~S" 'instance-read-internal kind))
550 (if (eq kind :default)
552 (let* ((index (gensym))
554 `(locally (declare #.*optimize-speed*)
555 (let ((,index (pvref ,pv ,pv-offset)))
556 (setq ,value (typecase ,index
557 ;; FIXME: the line marked by KLUDGE below
558 ;; (and the analogous spot in
559 ;; INSTANCE-WRITE-INTERNAL) is there purely
560 ;; to suppress a type mismatch warning that
561 ;; propagates through to user code.
562 ;; Presumably SLOTS at this point can never
563 ;; actually be NIL, but the compiler seems
564 ;; to think it could, so we put this here
565 ;; to shut it up. (see also mail Rudi
566 ;; Schlatte sbcl-devel 2003-09-21) -- CSR,
568 ,@(when (or (null kind) (eq kind :instance))
571 (clos-slots-ref ,slots ,index)))))
572 ,@(when (or (null kind) (eq kind :class))
573 `((cons (cdr ,index))))
575 (if (eq ,value +slot-unbound+)
579 (defmacro instance-read (pv-offset parameter position slot-name class)
580 (if (skip-fast-slot-access-p class slot-name 'reader)
581 `(accessor-slot-value ,parameter ,slot-name)
582 `(instance-read-internal .pv. ,(slot-vector-symbol position)
583 ,pv-offset (accessor-slot-value ,parameter ,slot-name)
584 ,(if (generate-fast-class-slot-access-p class slot-name)
587 (defmacro instance-write-internal (pv slots pv-offset new-value default
589 (unless (member kind '(nil :instance :class :default))
590 (error "illegal kind argument to ~S: ~S" 'instance-write-internal kind))
591 (if (eq kind :default)
593 (let* ((index (gensym)))
594 `(locally (declare #.*optimize-speed*)
595 (let ((,index (pvref ,pv ,pv-offset)))
597 ,@(when (or (null kind) (eq kind :instance))
598 `((fixnum (and ,slots
599 (setf (clos-slots-ref ,slots ,index)
601 ,@(when (or (null kind) (eq kind :class))
602 `((cons (setf (cdr ,index) ,new-value))))
605 (defmacro instance-write (pv-offset
611 (if (skip-fast-slot-access-p class slot-name 'writer)
612 `(accessor-set-slot-value ,parameter ,slot-name ,new-value)
613 `(instance-write-internal .pv. ,(slot-vector-symbol position)
614 ,pv-offset ,new-value
615 (accessor-set-slot-value ,parameter ,slot-name ,new-value)
616 ,(if (generate-fast-class-slot-access-p class slot-name)
619 (defmacro instance-boundp-internal (pv slots pv-offset default
621 (unless (member kind '(nil :instance :class :default))
622 (error "illegal kind argument to ~S: ~S" 'instance-boundp-internal kind))
623 (if (eq kind :default)
625 (let* ((index (gensym)))
626 `(locally (declare #.*optimize-speed*)
627 (let ((,index (pvref ,pv ,pv-offset)))
629 ,@(when (or (null kind) (eq kind :instance))
630 `((fixnum (not (and ,slots
631 (eq (clos-slots-ref ,slots ,index)
633 ,@(when (or (null kind) (eq kind :class))
634 `((cons (not (eq (cdr ,index) +slot-unbound+)))))
637 (defmacro instance-boundp (pv-offset parameter position slot-name class)
638 (if (skip-fast-slot-access-p class slot-name 'boundp)
639 `(accessor-slot-boundp ,parameter ,slot-name)
640 `(instance-boundp-internal .pv. ,(slot-vector-symbol position)
641 ,pv-offset (accessor-slot-boundp ,parameter ,slot-name)
642 ,(if (generate-fast-class-slot-access-p class slot-name)
645 ;;; This magic function has quite a job to do indeed.
647 ;;; The careful reader will recall that <slots> contains all of the
648 ;;; optimized slot access forms produced by OPTIMIZE-INSTANCE-ACCESS.
649 ;;; Each of these is a call to either INSTANCE-READ or INSTANCE-WRITE.
651 ;;; At the time these calls were produced, the first argument was
652 ;;; specified as the symbol .PV-OFFSET.; what we have to do now is
653 ;;; convert those pv-offset arguments into the actual number that is
654 ;;; the correct offset into the pv.
656 ;;; But first, oh but first, we sort <slots> a bit so that for each
657 ;;; argument we have the slots in alphabetical order. This
658 ;;; canonicalizes the PV-TABLE's a bit and will hopefully lead to
659 ;;; having fewer PV's floating around. Even if the gain is only
660 ;;; modest, it costs nothing.
661 (defun slot-name-lists-from-slots (slots calls)
662 (multiple-value-bind (slots calls) (mutate-slots-and-calls slots calls)
663 (let* ((slot-name-lists
664 (mapcar (lambda (parameter-entry)
665 (cons nil (mapcar #'car (cdr parameter-entry))))
668 (mapcar #'car calls)))
669 (dolist (call call-list)
670 (dolist (arg (cdr call))
672 (setf (car (nth arg slot-name-lists)) t))))
673 (setq slot-name-lists (mapcar (lambda (r+snl)
674 (when (or (car r+snl) (cdr r+snl))
677 (let ((cvt (apply #'vector
679 (mapcar (lambda (r+snl)
680 (when r+snl (incf i)))
682 (setq call-list (mapcar (lambda (call)
684 (mapcar (lambda (arg)
690 (values slot-name-lists call-list))))
692 (defun mutate-slots-and-calls (slots calls)
693 (let ((sorted-slots (sort-slots slots))
694 (sorted-calls (sort-calls (cdr calls)))
696 (dolist (parameter-entry sorted-slots)
697 (dolist (slot-entry (cdr parameter-entry))
699 (dolist (form (cdr slot-entry))
700 (setf (cadr form) pv-offset))))
701 (dolist (call-entry sorted-calls)
703 (dolist (form (cdr call-entry))
704 (setf (cadr form) pv-offset)))
705 (values sorted-slots sorted-calls)))
707 (defun symbol-pkg-name (sym)
708 (let ((pkg (symbol-package sym)))
709 (if pkg (package-name pkg) "")))
711 ;;; FIXME: Because of the existence of UNINTERN and RENAME-PACKAGE,
712 ;;; the part of this ordering which is based on SYMBOL-PKG-NAME is not
713 ;;; stable. This ordering is only used in to
714 ;;; SLOT-NAME-LISTS-FROM-SLOTS, where it serves to "canonicalize the
715 ;;; PV-TABLE's a bit and will hopefully lead to having fewer PV's
716 ;;; floating around", so it sounds as though the instability won't
717 ;;; actually lead to bugs, just small inefficiency. But still, it
718 ;;; would be better to reimplement this function as a comparison based
720 ;;; * stable comparison
721 ;;; * smaller code (here, and in being able to discard SYMBOL-PKG-NAME)
723 (defun symbol-lessp (a b)
724 (if (eq (symbol-package a)
726 (string-lessp (symbol-name a)
728 (string-lessp (symbol-pkg-name a)
729 (symbol-pkg-name b))))
731 (defun symbol-or-cons-lessp (a b)
734 (symbol (symbol-lessp a b))
738 (cons (if (eq (car a) (car b))
739 (symbol-or-cons-lessp (cdr a) (cdr b))
740 (symbol-or-cons-lessp (car a) (car b))))))))
742 (defun sort-slots (slots)
743 (mapcar (lambda (parameter-entry)
744 (cons (car parameter-entry)
745 (sort (cdr parameter-entry) ;slot entries
746 #'symbol-or-cons-lessp
750 (defun sort-calls (calls)
751 (sort calls #'symbol-or-cons-lessp :key #'car))
753 ;;;; This needs to work in terms of metatypes and also needs to work
754 ;;;; for automatically generated reader and writer functions.
755 ;;;; Automatically generated reader and writer functions use this
758 (defmacro pv-binding ((required-parameters slot-name-lists pv-table-form)
760 (let (slot-vars pv-parameters)
761 (loop for slots in slot-name-lists
762 for required-parameter in required-parameters
765 (push required-parameter pv-parameters)
766 (push (slot-vector-symbol i) slot-vars)))
767 `(pv-binding1 (.pv. .calls. ,pv-table-form
768 ,(nreverse pv-parameters) ,(nreverse slot-vars))
771 (defmacro pv-binding1 ((pv calls pv-table-form pv-parameters slot-vars)
773 `(pv-env (,pv ,calls ,pv-table-form ,pv-parameters)
774 (let (,@(mapcar (lambda (slot-var p) `(,slot-var (get-slots-or-nil ,p)))
775 slot-vars pv-parameters))
776 (declare (ignorable ,@(mapcar #'identity slot-vars)))
779 ;;; This will only be visible in PV-ENV when the default MAKE-METHOD-LAMBDA is
781 (define-symbol-macro pv-env-environment overridden)
783 (defmacro pv-env (&environment env
784 (pv calls pv-table-form pv-parameters)
786 ;; Decide which expansion to use based on the state of the PV-ENV-ENVIRONMENT
788 (if (eq (macroexpand 'pv-env-environment env) 'default)
789 `(let ((,pv (car .pv-cell.))
790 (,calls (cdr .pv-cell.)))
791 (declare ,(make-pv-type-declaration pv)
792 ,(make-calls-type-declaration calls))
795 `(let* ((.pv-table. ,pv-table-form)
796 (.pv-cell. (pv-table-lookup-pv-args .pv-table. ,@pv-parameters))
797 (,pv (car .pv-cell.))
798 (,calls (cdr .pv-cell.)))
799 (declare ,(make-pv-type-declaration pv))
800 (declare ,(make-calls-type-declaration calls))
804 (defvar *non-var-declarations*
805 ;; FIXME: VALUES was in this list, conditionalized with #+CMU, but I
806 ;; don't *think* CMU CL had, or SBCL has, VALUES declarations. If
807 ;; SBCL doesn't have 'em, VALUES should probably be removed from
817 (defvar *var-declarations-with-arg*
821 (defvar *var-declarations-without-arg*
823 ignorable special dynamic-extent
824 ;; FIXME: Possibly this entire list and variable could go away.
825 ;; If not, certainly we should remove all these built-in typenames
826 ;; from the list, and replace them with a test for "is it a type
827 ;; name?" (CLTL1 allowed only built-in type names as declarations,
828 ;; but ANSI CL allows any type name as a declaration.)
829 array atom base-char bignum bit bit-vector character compiled-function
830 complex cons double-float extended-char
831 fixnum float function hash-table integer
832 keyword list long-float nil null number package pathname random-state ratio
833 rational readtable sequence short-float signed-byte simple-array
834 simple-bit-vector simple-string simple-vector single-float standard-char
835 stream string symbol t unsigned-byte vector))
837 (defun split-declarations (body args maybe-reads-params-p)
838 (let ((inner-decls nil)
841 (loop (when (null body) (return nil))
842 (setq decl (car body))
843 (unless (and (consp decl)
844 (eq (car decl) 'declare))
846 (dolist (form (cdr decl))
848 (let ((declaration-name (car form)))
849 (if (member declaration-name *non-var-declarations*)
850 (push `(declare ,form) outer-decls)
852 (member declaration-name
853 *var-declarations-with-arg*))
855 (member declaration-name
856 *var-declarations-without-arg*))
857 (dname (list (pop form)))
858 (inners nil) (outers nil))
859 (unless (or arg-p non-arg-p)
860 ;; FIXME: This warning, and perhaps the
861 ;; various *VAR-DECLARATIONS-FOO* and/or
862 ;; *NON-VAR-DECLARATIONS* variables,
863 ;; could probably go away now that we're not
864 ;; trying to be portable between different
865 ;; CLTL1 hosts the way PCL was. (Note that to
866 ;; do this right, we need to be able to handle
867 ;; user-defined (DECLAIM (DECLARATION FOO))
869 (warn "The declaration ~S is not understood by ~S.~@
870 Please put ~S on one of the lists ~S,~%~S, or~%~S.~@
871 (Assuming it is a variable declaration without argument)."
872 declaration-name 'split-declarations
874 '*non-var-declarations*
875 '*var-declarations-with-arg*
876 '*var-declarations-without-arg*)
877 (push declaration-name *var-declarations-without-arg*))
879 (setq dname (append dname (list (pop form)))))
881 (%class (push `(declare (,@dname ,@form)) inner-decls))
884 (if (member var args)
885 ;; Quietly remove IGNORE declarations
886 ;; on args when a next-method is
887 ;; involved, to prevent compiler
888 ;; warnings about ignored args being
890 (unless (and maybe-reads-params-p
891 (eq (car dname) 'ignore))
895 (push `(declare (,@dname ,@outers)) outer-decls))
898 `(declare (,@dname ,@inners))
900 (setq body (cdr body)))
901 (values outer-decls inner-decls body)))
903 ;;; Pull a name out of the %METHOD-NAME declaration in the function
904 ;;; body given, or return NIL if no %METHOD-NAME declaration is found.
905 (defun body-method-name (body)
906 (multiple-value-bind (real-body declarations documentation)
908 (declare (ignore real-body documentation))
909 (let ((name-decl (get-declaration '%method-name declarations)))
911 (destructuring-bind (name) name-decl
914 ;;; Convert a lambda expression containing a SB-PCL::%METHOD-NAME
915 ;;; declaration (which is a naming style internal to PCL) into an
916 ;;; SB-INT:NAMED-LAMBDA expression (which is a naming style used
917 ;;; throughout SBCL, understood by the main compiler); or if there's
918 ;;; no SB-PCL::%METHOD-NAME declaration, then just return the original
919 ;;; lambda expression.
920 (defun name-method-lambda (method-lambda)
921 (let ((method-name (body-method-name (cddr method-lambda))))
923 `(named-lambda (slow-method ,method-name) ,(rest method-lambda))
926 (defun make-method-initargs-form-internal (method-lambda initargs env)
927 (declare (ignore env))
928 (let (method-lambda-args
929 lmf ; becomes body of function
931 (if (not (and (= 3 (length method-lambda))
932 (= 2 (length (setq method-lambda-args (cadr method-lambda))))
933 (consp (setq lmf (third method-lambda)))
934 (eq 'simple-lexical-method-functions (car lmf))
935 (eq (car method-lambda-args)
936 (cadr (setq lmf-params (cadr lmf))))
937 (eq (cadr method-lambda-args)
938 (caddr lmf-params))))
939 `(list* :function ,(name-method-lambda method-lambda)
941 (let* ((lambda-list (car lmf-params))
945 (dolist (arg lambda-list)
946 (when (member arg '(&optional &rest &key))
953 (setq args (nreverse args))
954 (setf (getf (getf initargs 'plist) :arg-info) (cons nreq restp))
955 (make-method-initargs-form-internal1
956 initargs (cddr lmf) args lmf-params restp)))))
958 (defun lambda-list-parameter-names (lambda-list)
959 ;; Given a valid lambda list, extract the parameter names.
960 (loop for x in lambda-list
962 do (unless (member x lambda-list-keywords)
964 (let ((name (car x)))
966 ;; ... ((:BAR FOO) 1)
967 (push (second name) res)
971 (let ((name-p (cddr x)))
973 (push (car name-p) res))))
976 finally (return res)))
978 (defun make-method-initargs-form-internal1
979 (initargs body req-args lmf-params restp)
980 (let* (;; The lambda-list of the method, minus specifiers
981 (lambda-list (car lmf-params))
982 ;; Names of the parameters that will be in the outermost lambda-list
983 ;; (and whose bound declarations thus need to be in OUTER-DECLS).
984 (outer-parameters req-args)
985 ;; The lambda-list used by BIND-ARGS
986 (bind-list lambda-list)
987 (setq-p (getf (cdr lmf-params) :setq-p))
988 (auxp (member '&aux bind-list))
989 (call-next-method-p (getf (cdr lmf-params) :call-next-method-p)))
990 ;; Try to use the normal function call machinery instead of BIND-ARGS
991 ;; binding the arguments, unless:
992 (unless (or ;; If all arguments are required, BIND-ARGS will be a no-op
994 (and (not restp) (not auxp))
995 ;; CALL-NEXT-METHOD wants to use BIND-ARGS, and needs a
996 ;; list of all non-required arguments.
998 (setf ;; We don't want a binding for .REST-ARG.
1000 ;; Get all the parameters for declaration parsing
1001 outer-parameters (lambda-list-parameter-names lambda-list)
1002 ;; Ensure that BIND-ARGS won't do anything (since
1003 ;; BIND-LIST won't contain any non-required parameters,
1004 ;; and REQ-ARGS will be of an equal length). We still want
1005 ;; to pass BIND-LIST to FAST-LEXICAL-METHOD-FUNCTIONS so
1006 ;; that BIND-FAST-LEXICAL-METHOD-FUNCTIONS can take care
1007 ;; of rebinding SETQd required arguments around the method
1009 bind-list req-args))
1010 (multiple-value-bind (outer-decls inner-decls body-sans-decls)
1012 body outer-parameters (or call-next-method-p setq-p))
1013 (let* ((rest-arg (when restp
1015 (fmf-lambda-list (if rest-arg
1016 (append req-args (list '&rest rest-arg))
1017 (if call-next-method-p
1022 (let* ((fmf (,(if (body-method-name body) 'named-lambda 'lambda)
1023 ,@(when (body-method-name body)
1025 (list (cons 'fast-method (body-method-name body))))
1026 ;; The lambda-list of the FMF
1027 (.pv-cell. .next-method-call. ,@fmf-lambda-list)
1028 ;; body of the function
1029 (declare (ignorable .pv-cell. .next-method-call.)
1030 (disable-package-locks pv-env-environment))
1032 (symbol-macrolet ((pv-env-environment default))
1033 (fast-lexical-method-functions
1034 (,bind-list .next-method-call. ,req-args ,rest-arg
1035 ,@(cdddr lmf-params))
1037 ,@body-sans-decls))))
1038 (mf (%make-method-function fmf nil)))
1039 (set-funcallable-instance-function
1040 mf (method-function-from-fast-function fmf ',(getf initargs 'plist)))
1044 ;;; Use arrays and hash tables and the fngen stuff to make this much
1045 ;;; better. It doesn't really matter, though, because a function
1046 ;;; returned by this will get called only when the user explicitly
1047 ;;; funcalls a result of method-function. BUT, this is needed to make
1048 ;;; early methods work.
1049 (defun method-function-from-fast-function (fmf plist)
1050 (declare (type function fmf))
1051 (let* ((method-function nil)
1052 (calls (getf plist :call-list))
1053 (snl (getf plist :slot-name-lists))
1054 (pv-table (when (or calls snl)
1055 (intern-pv-table :call-list calls :slot-name-lists snl)))
1056 (arg-info (getf plist :arg-info))
1057 (nreq (car arg-info))
1058 (restp (cdr arg-info)))
1059 (setq method-function
1060 (lambda (method-args next-methods)
1061 (let* ((pv-cell (when pv-table
1062 (get-pv-cell method-args pv-table)))
1063 (nm (car next-methods))
1064 (nms (cdr next-methods))
1067 :function (if (std-instance-p nm)
1068 (method-function nm)
1070 :call-method-args (list nms)))))
1071 (apply fmf pv-cell nmc method-args))))
1072 ;; FIXME: this looks dangerous.
1073 (let* ((fname (%fun-name fmf)))
1074 (when (and fname (eq (car fname) 'fast-method))
1075 (set-fun-name method-function (cons 'slow-method (cdr fname)))))
1078 ;;; this is similar to the above, only not quite. Only called when
1079 ;;; the MOP is heavily involved. Not quite parallel to
1080 ;;; METHOD-FUNCTION-FROM-FAST-METHOD-FUNCTION, because we can close
1081 ;;; over the actual PV-CELL in this case.
1082 (defun method-function-from-fast-method-call (fmc)
1083 (let* ((fmf (fast-method-call-function fmc))
1084 (pv-cell (fast-method-call-pv-cell fmc))
1085 (arg-info (fast-method-call-arg-info fmc))
1086 (nreq (car arg-info))
1087 (restp (cdr arg-info)))
1088 (lambda (method-args next-methods)
1089 (let* ((nm (car next-methods))
1090 (nms (cdr next-methods))
1093 :function (if (std-instance-p nm)
1094 (method-function nm)
1096 :call-method-args (list nms)))))
1097 (apply fmf pv-cell nmc method-args)))))
1099 (defun get-pv-cell (method-args pv-table)
1100 (let ((pv-wrappers (pv-wrappers-from-all-args pv-table method-args)))
1102 (pv-table-lookup pv-table pv-wrappers))))
1104 (defun pv-table-lookup-pv-args (pv-table &rest pv-parameters)
1105 (pv-table-lookup pv-table (pv-wrappers-from-pv-args pv-parameters)))
1107 (defun pv-wrappers-from-pv-args (&rest args)
1109 (dolist (arg args (if (cdr wrappers) (nreverse wrappers) (car wrappers)))
1110 (let ((wrapper (wrapper-of arg)))
1111 (push (if (invalid-wrapper-p wrapper)
1112 (check-wrapper-validity wrapper)
1116 (defun pv-wrappers-from-all-args (pv-table args)
1117 (loop for snl in (pv-table-slot-name-lists pv-table) and arg in args
1119 collect (wrapper-of arg) into wrappers
1120 finally (return (if (cdr wrappers) wrappers (car wrappers)))))
1122 ;;; Return the subset of WRAPPERS which is used in the cache
1124 (defun pv-wrappers-from-all-wrappers (pv-table wrappers)
1125 (loop for snl in (pv-table-slot-name-lists pv-table) and w in wrappers
1127 collect w into result
1128 finally (return (if (cdr result) result (car result)))))