src/pcl/fast-init.lisp

   1 ;;;; This file defines the optimized make-instance functions.
   2
   3 ;;;; This software is part of the SBCL system. See the README file for
   4 ;;;; more information.
   5
   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
  10 ;;;; information.
  11
  12 ;;;; copyright information from original PCL sources:
  13 ;;;;
  14 ;;;; Copyright (c) 1985, 1986, 1987, 1988, 1989, 1990 Xerox Corporation.
  15 ;;;; All rights reserved.
  16 ;;;;
  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
  20 ;;;; control laws.
  21 ;;;;
  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
  24 ;;;; specification.
  25
  26 (in-package "SB-PCL")
  27 \f
  28 (defvar *compile-make-instance-functions-p* nil)
  29
  30 (defun update-make-instance-function-table (&optional (class *the-class-t*))
  31   (when (symbolp class) (setq class (find-class class)))
  32     (when (eq class *the-class-t*) (setq class *the-class-slot-object*))
  33     (when (memq *the-class-slot-object* (class-precedence-list class))
  34       (map-all-classes #'reset-class-initialize-info class)))
  35
  36 (defun constant-symbol-p (form)
  37   (and (constantp form)
  38        (let ((object (eval form)))
  39          (and (symbolp object)
  40               (symbol-package object)))))
  41
  42 (defvar *make-instance-function-keys* nil)
  43
  44 (defun expand-make-instance-form (form)
  45   (let ((class (cadr form)) (initargs (cddr form))
  46         (keys nil)(allow-other-keys-p nil) key value)
  47     (when (and (constant-symbol-p class)
  48                (let ((initargs-tail initargs))
  49                  (loop (when (null initargs-tail) (return t))
  50                        (unless (constant-symbol-p (car initargs-tail))
  51                          (return nil))
  52                        (setq key (eval (pop initargs-tail)))
  53                        (setq value (pop initargs-tail))
  54                        (when (eq ':allow-other-keys key)
  55                          (setq allow-other-keys-p value))
  56                        (push key keys))))
  57       (let* ((class (eval class))
  58              (keys (nreverse keys))
  59              (key (list class keys allow-other-keys-p))
  60              (sym (make-instance-function-symbol key)))
  61         (push key *make-instance-function-keys*)
  62         (when sym
  63           ;; (famous last words:
  64           ;;   1. Don't worry, I know what I'm doing.
  65           ;;   2. You and what army?
  66           ;;   3. If you were as smart as you think you are, you
  67           ;;      wouldn't be a copy.
  68           ;; This is case #1.:-) Even if SYM hasn't been defined yet,
  69           ;; it must be an implementation function, or we we wouldn't
  70           ;; have expanded into it. So declare SYM as defined, so that
  71           ;; even if it hasn't been defined yet, the user doesn't get
  72           ;; obscure warnings about undefined internal implementation
  73           ;; functions like HAIRY-MAKE-instance-name.
  74           (sb-kernel:become-defined-fun-name sym)
  75           `(,sym ',class (list ,@initargs)))))))
  76
  77 (defmacro expanding-make-instance-toplevel (&rest forms &environment env)
  78   (let* ((*make-instance-function-keys* nil)
  79          (form (macroexpand `(expanding-make-instance ,@forms) env)))
  80     `(progn
  81        ,@(when *make-instance-function-keys*
  82            `((get-make-instance-functions ',*make-instance-function-keys*)))
  83        ,form)))
  84
  85 (defmacro expanding-make-instance (&rest forms &environment env)
  86   `(progn
  87      ,@(mapcar #'(lambda (form)
  88                    (walk-form form env
  89                               #'(lambda (subform context env)
  90                                   (declare (ignore env))
  91                                   (or (and (eq context ':eval)
  92                                            (consp subform)
  93                                            (eq (car subform) 'make-instance)
  94                                            (expand-make-instance-form subform))
  95                                       subform))))
  96                forms)))
  97
  98 (defmacro defconstructor
  99           (name class lambda-list &rest initialization-arguments)
 100   `(expanding-make-instance-toplevel
 101     (defun ,name ,lambda-list
 102       (make-instance ',class ,@initialization-arguments))))
 103
 104 (defun get-make-instance-functions (key-list)
 105   (dolist (key key-list)
 106     (let* ((cell (find-class-cell (car key)))
 107            (make-instance-function-keys
 108             (find-class-cell-make-instance-function-keys cell))
 109            (mif-key (cons (cadr key) (caddr key))))
 110       (unless (find mif-key make-instance-function-keys
 111                     :test #'equal)
 112         (push mif-key (find-class-cell-make-instance-function-keys cell))
 113         (let ((class (find-class-cell-class cell)))
 114           (when (and class (not (forward-referenced-class-p class)))
 115             (update-initialize-info-internal
 116              (initialize-info class (car mif-key) nil (cdr mif-key))
 117              'make-instance-function)))))))
 118
 119 (defun make-instance-function-symbol (key)
 120   (let* ((class (car key))
 121          (symbolp (symbolp class)))
 122     (when (or symbolp (classp class))
 123       (let* ((class-name (if (symbolp class) class (class-name class)))
 124              (keys (cadr key))
 125              (allow-other-keys-p (caddr key)))
 126         (when (and (or symbolp
 127                        (and (symbolp class-name)
 128                             (eq class (find-class class-name nil))))
 129                    (symbol-package class-name))
 130           (let ((*package* *pcl-package*)
 131                 (*print-length* nil)
 132                 (*print-level* nil)
 133                 (*print-circle* nil)
 134                 (*print-case* :upcase)
 135                 (*print-pretty* nil))
 136             (intern (format nil
 137                             "MAKE-INSTANCE ~S ~S ~S"
 138                             class-name
 139                             keys
 140                             allow-other-keys-p))))))))
 141
 142 (defun make-instance-1 (class initargs)
 143   (apply #'make-instance class initargs))
 144
 145 (defmacro define-cached-reader (type name trap)
 146   (let ((reader-name (intern (format nil "~A-~A" type name)))
 147         (cached-name (intern (format nil "~A-CACHED-~A" type name))))
 148     `(defmacro ,reader-name (info)
 149        `(let ((value (,',cached-name ,info)))
 150           (if (eq value ':unknown)
 151               (progn
 152                 (,',trap ,info ',',name)
 153                 (,',cached-name ,info))
 154               value)))))
 155
 156 (eval-when (:compile-toplevel :load-toplevel :execute)
 157 (defparameter *initialize-info-cached-slots*
 158   '(valid-p                             ; t or (:invalid key)
 159     ri-valid-p
 160     initargs-form-list
 161     new-keys
 162     default-initargs-function
 163     shared-initialize-t-function
 164     shared-initialize-nil-function
 165     constants
 166     combined-initialize-function ; allocate-instance + shared-initialize
 167     make-instance-function ; nil means use gf
 168     make-instance-function-symbol)))
 169
 170 (defmacro define-initialize-info ()
 171   (let ((cached-slot-names
 172          (mapcar #'(lambda (name)
 173                      (intern (format nil "CACHED-~A" name)))
 174                  *initialize-info-cached-slots*))
 175         (cached-names
 176          (mapcar #'(lambda (name)
 177                      (intern (format nil "~A-CACHED-~A"
 178                                      'initialize-info name)))
 179                  *initialize-info-cached-slots*)))
 180     `(progn
 181        (defstruct (initialize-info (:copier nil))
 182          key wrapper
 183          ,@(mapcar #'(lambda (name)
 184                        `(,name :unknown))
 185                    cached-slot-names))
 186        (defmacro reset-initialize-info-internal (info)
 187          `(progn
 188             ,@(mapcar #'(lambda (cname)
 189                           `(setf (,cname ,info) ':unknown))
 190                       ',cached-names)))
 191        (defun initialize-info-bound-slots (info)
 192          (let ((slots nil))
 193            ,@(mapcar #'(lambda (name cached-name)
 194                          `(unless (eq ':unknown (,cached-name info))
 195                             (push ',name slots)))
 196                      *initialize-info-cached-slots* cached-names)
 197            slots))
 198       ,@(mapcar #'(lambda (name)
 199                     `(define-cached-reader initialize-info ,name
 200                       update-initialize-info-internal))
 201                 *initialize-info-cached-slots*))))
 202
 203 (define-initialize-info)
 204
 205 (defvar *initialize-info-cache-class* nil)
 206 (defvar *initialize-info-cache-initargs* nil)
 207 (defvar *initialize-info-cache-info* nil)
 208
 209 (defvar *revert-initialize-info-p* nil)
 210
 211 (defun reset-initialize-info (info)
 212   (setf (initialize-info-wrapper info)
 213         (class-wrapper (car (initialize-info-key info))))
 214   (let ((slots-to-revert (if *revert-initialize-info-p*
 215                              (initialize-info-bound-slots info)
 216                              '(make-instance-function))))
 217     (reset-initialize-info-internal info)
 218     (dolist (slot slots-to-revert)
 219       (update-initialize-info-internal info slot))
 220     info))
 221
 222 (defun reset-class-initialize-info (class)
 223   (reset-class-initialize-info-1 (class-initialize-info class)))
 224
 225 (defun reset-class-initialize-info-1 (cell)
 226   (when (consp cell)
 227     (when (car cell)
 228       (reset-initialize-info (car cell)))
 229     (let ((alist (cdr cell)))
 230       (dolist (a alist)
 231         (reset-class-initialize-info-1 (cdr a))))))
 232
 233 (defun initialize-info (class
 234                         initargs
 235                         &optional
 236                         (plist-p t)
 237                         allow-other-keys-arg)
 238   (let ((info nil))
 239     (if (and (eq *initialize-info-cache-class* class)
 240              (eq *initialize-info-cache-initargs* initargs))
 241         (setq info *initialize-info-cache-info*)
 242         (let ((initargs-tail initargs)
 243               (cell (or (class-initialize-info class)
 244                         (setf (class-initialize-info class) (cons nil nil)))))
 245           (loop (when (null initargs-tail) (return nil))
 246                 (let ((keyword (pop initargs-tail))
 247                       (alist-cell cell))
 248                   (when plist-p
 249                     (if (eq keyword :allow-other-keys)
 250                         (setq allow-other-keys-arg (pop initargs-tail))
 251                         (pop initargs-tail)))
 252                   (loop (let ((alist (cdr alist-cell)))
 253                           (when (null alist)
 254                             (setq cell (cons nil nil))
 255                             (setf (cdr alist-cell) (list (cons keyword cell)))
 256                             (return nil))
 257                           (when (eql keyword (caar alist))
 258                             (setq cell (cdar alist))
 259                             (return nil))
 260                           (setq alist-cell alist)))))
 261           (setq info (or (car cell)
 262                          (setf (car cell) (make-initialize-info))))))
 263     (let ((wrapper (initialize-info-wrapper info)))
 264       (unless (eq wrapper (class-wrapper class))
 265         (unless wrapper
 266           (let* ((initargs-tail initargs)
 267                  (klist-cell (list nil))
 268                  (klist-tail klist-cell))
 269             (loop (when (null initargs-tail) (return nil))
 270                   (let ((key (pop initargs-tail)))
 271                     (setf (cdr klist-tail) (list key)))
 272                   (setf klist-tail (cdr klist-tail))
 273                   (when plist-p (pop initargs-tail)))
 274             (setf (initialize-info-key info)
 275                   (list class (cdr klist-cell) allow-other-keys-arg))))
 276         (reset-initialize-info info)))
 277     (setq *initialize-info-cache-class* class)
 278     (setq *initialize-info-cache-initargs* initargs)
 279     (setq *initialize-info-cache-info* info)
 280     info))
 281
 282 (defun update-initialize-info-internal (info name)
 283   (let* ((key (initialize-info-key info))
 284          (class (car key))
 285          (keys (cadr key))
 286          (allow-other-keys-arg (caddr key)))
 287     (ecase name
 288       ((initargs-form-list new-keys)
 289        (multiple-value-bind (initargs-form-list new-keys)
 290            (make-default-initargs-form-list class keys)
 291          (setf (initialize-info-cached-initargs-form-list info)
 292                initargs-form-list)
 293          (setf (initialize-info-cached-new-keys info) new-keys)))
 294       ((default-initargs-function)
 295        (let ((initargs-form-list (initialize-info-initargs-form-list info)))
 296          (setf (initialize-info-cached-default-initargs-function info)
 297                (initialize-instance-simple-function
 298                 'default-initargs-function info
 299                 class initargs-form-list))))
 300       ((valid-p ri-valid-p)
 301        (flet ((compute-valid-p (methods)
 302                 (or (not (null allow-other-keys-arg))
 303                     (multiple-value-bind (legal allow-other-keys)
 304                         (check-initargs-values class methods)
 305                       (or (not (null allow-other-keys))
 306                           (dolist (key keys t)
 307                             (unless (member key legal)
 308                               (return (cons :invalid key)))))))))
 309          (let ((proto (class-prototype class)))
 310            (setf (initialize-info-cached-valid-p info)
 311                  (compute-valid-p
 312                   (list (list* 'allocate-instance class nil)
 313                         (list* 'initialize-instance proto nil)
 314                         (list* 'shared-initialize proto t nil))))
 315            (setf (initialize-info-cached-ri-valid-p info)
 316                  (compute-valid-p
 317                   (list (list* 'reinitialize-instance proto nil)
 318                         (list* 'shared-initialize proto nil nil)))))))
 319       ((shared-initialize-t-function)
 320        (multiple-value-bind (initialize-form-list ignore)
 321            (make-shared-initialize-form-list class keys t nil)
 322          (declare (ignore ignore))
 323          (setf (initialize-info-cached-shared-initialize-t-function info)
 324                (initialize-instance-simple-function
 325                 'shared-initialize-t-function info
 326                 class initialize-form-list))))
 327       ((shared-initialize-nil-function)
 328        (multiple-value-bind (initialize-form-list ignore)
 329            (make-shared-initialize-form-list class keys nil nil)
 330          (declare (ignore ignore))
 331          (setf (initialize-info-cached-shared-initialize-nil-function info)
 332                (initialize-instance-simple-function
 333                 'shared-initialize-nil-function info
 334                 class initialize-form-list))))
 335       ((constants combined-initialize-function)
 336        (let ((initargs-form-list (initialize-info-initargs-form-list info))
 337              (new-keys (initialize-info-new-keys info)))
 338          (multiple-value-bind (initialize-form-list constants)
 339              (make-shared-initialize-form-list class new-keys t t)
 340            (setf (initialize-info-cached-constants info) constants)
 341            (setf (initialize-info-cached-combined-initialize-function info)
 342                  (initialize-instance-simple-function
 343                   'combined-initialize-function info
 344                   class (append initargs-form-list initialize-form-list))))))
 345       ((make-instance-function-symbol)
 346        (setf (initialize-info-cached-make-instance-function-symbol info)
 347              (make-instance-function-symbol key)))
 348       ((make-instance-function)
 349        (let* ((function (get-make-instance-function key))
 350               (symbol (initialize-info-make-instance-function-symbol info)))
 351          (setf (initialize-info-cached-make-instance-function info) function)
 352          (when symbol (setf (gdefinition symbol)
 353                             (or function #'make-instance-1)))))))
 354   info)
 355
 356 (defun get-make-instance-function (key)
 357   (let* ((class (car key))
 358          (keys (cadr key)))
 359     (unless (eq *boot-state* 'complete)
 360       (return-from get-make-instance-function nil))
 361     (when (symbolp class)
 362       (setq class (find-class class)))
 363     (when (classp class)
 364       (unless (class-finalized-p class) (finalize-inheritance class)))
 365     (let* ((initargs (mapcan #'(lambda (key) (list key nil)) keys))
 366            (class-and-initargs (list* class initargs))
 367            (make-instance (gdefinition 'make-instance))
 368            (make-instance-methods
 369             (compute-applicable-methods make-instance class-and-initargs))
 370            (std-mi-meth (find-standard-ii-method make-instance-methods 'class))
 371            (class+initargs (list class initargs))
 372            (default-initargs (gdefinition 'default-initargs))
 373            (default-initargs-methods
 374                (compute-applicable-methods default-initargs class+initargs))
 375            (proto (and (classp class) (class-prototype class)))
 376            (initialize-instance-methods
 377             (when proto
 378               (compute-applicable-methods (gdefinition 'initialize-instance)
 379                                           (list* proto initargs))))
 380            (shared-initialize-methods
 381             (when proto
 382               (compute-applicable-methods (gdefinition 'shared-initialize)
 383                                           (list* proto t initargs)))))
 384       (when (null make-instance-methods)
 385         (return-from get-make-instance-function
 386           #'(lambda (class initargs)
 387               (apply #'no-applicable-method make-instance class initargs))))
 388       (unless (and (null (cdr make-instance-methods))
 389                    (eq (car make-instance-methods) std-mi-meth)
 390                    (null (cdr default-initargs-methods))
 391                    (eq (car (method-specializers
 392                              (car default-initargs-methods)))
 393                        *the-class-slot-class*)
 394                    (flet ((check-meth (meth)
 395                             (let ((quals (method-qualifiers meth)))
 396                               (if (null quals)
 397                                   (eq (car (method-specializers meth))
 398                                       *the-class-slot-object*)
 399                                   (and (null (cdr quals))
 400                                        (or (eq (car quals) ':before)
 401                                            (eq (car quals) ':after)))))))
 402                      (and (every #'check-meth initialize-instance-methods)
 403                           (every #'check-meth shared-initialize-methods))))
 404         (return-from get-make-instance-function nil))
 405       (get-make-instance-function-internal
 406        class key (default-initargs class initargs)
 407        initialize-instance-methods shared-initialize-methods))))
 408
 409 (defun get-make-instance-function-internal (class key initargs
 410                                                   initialize-instance-methods
 411                                                   shared-initialize-methods)
 412   (let* ((keys (cadr key))
 413          (allow-other-keys-p (caddr key))
 414          (allocate-instance-methods
 415           (compute-applicable-methods (gdefinition 'allocate-instance)
 416                                       (list* class initargs))))
 417     (unless allow-other-keys-p
 418       (unless (check-initargs-1
 419                class initargs
 420                (append allocate-instance-methods
 421                        initialize-instance-methods
 422                        shared-initialize-methods)
 423                t nil)
 424         (return-from get-make-instance-function-internal nil)))
 425     (if (or (cdr allocate-instance-methods)
 426             (some #'complicated-instance-creation-method
 427                   initialize-instance-methods)
 428             (some #'complicated-instance-creation-method
 429                   shared-initialize-methods))
 430         (make-instance-function-complex
 431          key class keys
 432          initialize-instance-methods shared-initialize-methods)
 433         (make-instance-function-simple
 434          key class keys
 435          initialize-instance-methods shared-initialize-methods))))
 436
 437 (defun complicated-instance-creation-method (m)
 438   (let ((qual (method-qualifiers m)))
 439     (if qual
 440         (not (and (null (cdr qual)) (eq (car qual) ':after)))
 441         (let ((specl (car (method-specializers m))))
 442           (or (not (classp specl))
 443               (not (eq 'slot-object (class-name specl))))))))
 444
 445 (defun find-standard-ii-method (methods class-names)
 446   (dolist (m methods)
 447     (when (null (method-qualifiers m))
 448       (let ((specl (car (method-specializers m))))
 449         (when (and (classp specl)
 450                    (if (listp class-names)
 451                        (member (class-name specl) class-names)
 452                        (eq (class-name specl) class-names)))
 453           (return m))))))
 454
 455 (defmacro call-initialize-function (initialize-function instance initargs)
 456   `(let ((.function. ,initialize-function))
 457      (if (and (consp .function.)
 458               (eq (car .function.) 'call-initialize-instance-simple))
 459          (initialize-instance-simple (cadr .function.) (caddr .function.)
 460                                      ,instance ,initargs)
 461          (funcall (the function .function.) ,instance ,initargs))))
 462
 463 (defun make-instance-function-simple (key class keys
 464                                           initialize-instance-methods
 465                                           shared-initialize-methods)
 466   (multiple-value-bind (initialize-function constants)
 467       (get-simple-initialization-function class keys (caddr key))
 468     (let* ((wrapper (class-wrapper class))
 469            (lwrapper (list wrapper))
 470            (allocate-function
 471             (cond ((structure-class-p class)
 472                    #'allocate-structure-instance)
 473                   ((standard-class-p class)
 474                    #'allocate-standard-instance)
 475                   ((funcallable-standard-class-p class)
 476                    #'allocate-funcallable-instance)
 477                   (t
 478                    (error "error in make-instance-function-simple"))))
 479            (std-si-meth (find-standard-ii-method shared-initialize-methods
 480                                                  'slot-object))
 481            (shared-initfns
 482             (nreverse (mapcar #'(lambda (method)
 483                                   (make-effective-method-function
 484                                    #'shared-initialize
 485                                    `(call-method ,method nil)
 486                                    nil lwrapper))
 487                               (remove std-si-meth shared-initialize-methods))))
 488            (std-ii-meth (find-standard-ii-method initialize-instance-methods
 489                                                  'slot-object))
 490            (initialize-initfns
 491             (nreverse (mapcar #'(lambda (method)
 492                                   (make-effective-method-function
 493                                    #'initialize-instance
 494                                    `(call-method ,method nil)
 495                                    nil lwrapper))
 496                               (remove std-ii-meth
 497                                       initialize-instance-methods)))))
 498       #'(lambda (class1 initargs)
 499           (if (not (eq wrapper (class-wrapper class)))
 500               (let* ((info (initialize-info class1 initargs))
 501                      (fn (initialize-info-make-instance-function info)))
 502                 (declare (type function fn))
 503                 (funcall fn class1 initargs))
 504               (let* ((instance (funcall allocate-function wrapper constants))
 505                      (initargs (call-initialize-function initialize-function
 506                                                          instance initargs)))
 507                 (dolist (fn shared-initfns)
 508                   (invoke-effective-method-function fn t instance t initargs))
 509                 (dolist (fn initialize-initfns)
 510                   (invoke-effective-method-function fn t instance initargs))
 511                 instance))))))
 512
 513 (defun make-instance-function-complex (key class keys
 514                                            initialize-instance-methods
 515                                            shared-initialize-methods)
 516   (multiple-value-bind (initargs-function initialize-function)
 517       (get-complex-initialization-functions class keys (caddr key))
 518     (let* ((wrapper (class-wrapper class))
 519            (shared-initialize
 520             (get-secondary-dispatch-function
 521              #'shared-initialize shared-initialize-methods
 522              `((class-eq ,class) t t)
 523              `((,(find-standard-ii-method shared-initialize-methods
 524                                           'slot-object)
 525                 ,#'(lambda (instance init-type &rest initargs)
 526                      (declare (ignore init-type))
 527                      (call-initialize-function initialize-function
 528                                                instance initargs)
 529                      instance)))
 530              (list wrapper *the-wrapper-of-t* *the-wrapper-of-t*)))
 531            (initialize-instance
 532             (get-secondary-dispatch-function
 533              #'initialize-instance initialize-instance-methods
 534              `((class-eq ,class) t)
 535              `((,(find-standard-ii-method initialize-instance-methods
 536                                           'slot-object)
 537                 ,#'(lambda (instance &rest initargs)
 538                      (invoke-effective-method-function
 539                       shared-initialize t instance t initargs))))
 540              (list wrapper *the-wrapper-of-t*))))
 541       #'(lambda (class1 initargs)
 542           (if (not (eq wrapper (class-wrapper class)))
 543               (let* ((info (initialize-info class1 initargs))
 544                      (fn (initialize-info-make-instance-function info)))
 545                 (declare (type function fn))
 546                 (funcall fn class1 initargs))
 547               (let* ((initargs (call-initialize-function initargs-function
 548                                                          nil initargs))
 549                      (instance (apply #'allocate-instance class initargs)))
 550                 (invoke-effective-method-function
 551                  initialize-instance t instance initargs)
 552                 instance))))))
 553
 554 (defun get-simple-initialization-function (class
 555                                            keys
 556                                            &optional allow-other-keys-arg)
 557   (let ((info (initialize-info class keys nil allow-other-keys-arg)))
 558     (values (initialize-info-combined-initialize-function info)
 559             (initialize-info-constants info))))
 560
 561 (defun get-complex-initialization-functions (class
 562                                              keys
 563                                              &optional
 564                                              allow-other-keys-arg
 565                                              separate-p)
 566   (let* ((info (initialize-info class keys nil allow-other-keys-arg))
 567          (default-initargs-function (initialize-info-default-initargs-function
 568                                      info)))
 569     (if separate-p
 570         (values default-initargs-function
 571                 (initialize-info-shared-initialize-t-function info))
 572         (values default-initargs-function
 573                 (initialize-info-shared-initialize-t-function
 574                  (initialize-info class (initialize-info-new-keys info)
 575                                   nil allow-other-keys-arg))))))
 576
 577 (defun add-forms (forms forms-list)
 578   (when forms
 579     (setq forms (copy-list forms))
 580     (if (null (car forms-list))
 581         (setf (car forms-list) forms)
 582         (setf (cddr forms-list) forms))
 583     (setf (cdr forms-list) (last forms)))
 584   (car forms-list))
 585
 586 (defun make-default-initargs-form-list (class keys &optional (separate-p t))
 587   (let ((initargs-form-list (cons nil nil))
 588         (default-initargs (class-default-initargs class))
 589         (nkeys keys)
 590         (slots-alist
 591          (mapcan #'(lambda (slot)
 592                      (mapcar #'(lambda (arg)
 593                                  (cons arg slot))
 594                              (slot-definition-initargs slot)))
 595                  (class-slots class)))
 596         (nslots nil))
 597     (dolist (key nkeys)
 598       (pushnew (cdr (assoc key slots-alist)) nslots))
 599     (dolist (default default-initargs)
 600       (let* ((key (car default))
 601              (slot (cdr (assoc key slots-alist)))
 602              (function (cadr default)))
 603         (unless (member slot nslots)
 604           (add-forms `((funcall ,function) (push-initarg ,key))
 605                      initargs-form-list)
 606           (push key nkeys)
 607           (push slot nslots))))
 608     (when separate-p
 609       (add-forms `((update-initialize-info-cache
 610                     ,class ,(initialize-info class nkeys nil)))
 611                  initargs-form-list))
 612     (add-forms `((finish-pushing-initargs))
 613                initargs-form-list)
 614     (values (car initargs-form-list) nkeys)))
 615
 616 (defun make-shared-initialize-form-list (class keys si-slot-names simple-p)
 617   (let* ((initialize-form-list (cons nil nil))
 618          (type (cond ((structure-class-p class)
 619                       'structure)
 620                      ((standard-class-p class)
 621                       'standard)
 622                      ((funcallable-standard-class-p class)
 623                       'funcallable)
 624                      (t (error "error in make-shared-initialize-form-list"))))
 625          (wrapper (class-wrapper class))
 626          (constants (when simple-p
 627                       (make-list (wrapper-no-of-instance-slots wrapper)
 628                                  ':initial-element +slot-unbound+)))
 629          (slots (class-slots class))
 630          (slot-names (mapcar #'slot-definition-name slots))
 631          (slots-key (mapcar #'(lambda (slot)
 632                                 (let ((index most-positive-fixnum))
 633                                   (dolist (key (slot-definition-initargs slot))
 634                                     (let ((pos (position key keys)))
 635                                       (when pos (setq index (min index pos)))))
 636                                   (cons slot index)))
 637                             slots))
 638          (slots (stable-sort slots-key #'< :key #'cdr)))
 639     (let ((n-popped 0))
 640       (dolist (slot+index slots)
 641         (let* ((slot (car slot+index))
 642                (name (slot-definition-name slot))
 643                (npop (1+ (- (cdr slot+index) n-popped))))
 644           (unless (eql (cdr slot+index) most-positive-fixnum)
 645             (let* ((pv-offset (1+ (position name slot-names))))
 646               (add-forms `(,@(when (plusp npop)
 647                                `((pop-initargs ,(* 2 npop))))
 648                            (instance-set ,pv-offset ,slot))
 649                          initialize-form-list))
 650             (incf n-popped npop)))))
 651     (dolist (slot+index slots)
 652       (let* ((slot (car slot+index))
 653              (name (slot-definition-name slot)))
 654         (when (and (eql (cdr slot+index) most-positive-fixnum)
 655                    (or (eq si-slot-names t)
 656                        (member name si-slot-names)))
 657           (let* ((initform (slot-definition-initform slot))
 658                  (initfunction (slot-definition-initfunction slot))
 659                  (location (unless (eq type 'structure)
 660                              (slot-definition-location slot)))
 661                  (pv-offset (1+ (position name slot-names)))
 662                  (forms (cond ((null initfunction)
 663                                nil)
 664                               ((constantp initform)
 665                                (let ((value (funcall initfunction)))
 666                                  (if (and simple-p (integerp location))
 667                                      (progn (setf (nth location constants)
 668                                                   value)
 669                                             nil)
 670                                      `((const ,value)
 671                                        (instance-set ,pv-offset ,slot)))))
 672                               (t
 673                                `((funcall ,(slot-definition-initfunction slot))
 674                                  (instance-set ,pv-offset ,slot))))))
 675             (add-forms `(,@(unless (or simple-p (null forms))
 676                              `((skip-when-instance-boundp ,pv-offset ,slot
 677                                 ,(length forms))))
 678                          ,@forms)
 679                        initialize-form-list)))))
 680     (values (car initialize-form-list) constants)))
 681
 682 (defvar *class-pv-table-table* (make-hash-table :test 'eq))
 683
 684 (defun get-pv-cell-for-class (class)
 685   (let* ((slot-names (mapcar #'slot-definition-name (class-slots class)))
 686          (slot-name-lists (list (cons nil slot-names)))
 687          (pv-table (gethash class *class-pv-table-table*)))
 688     (unless (and pv-table
 689                  (equal slot-name-lists (pv-table-slot-name-lists pv-table)))
 690       (setq pv-table (intern-pv-table :slot-name-lists slot-name-lists))
 691       (setf (gethash class *class-pv-table-table*) pv-table))
 692     (pv-table-lookup pv-table (class-wrapper class))))
 693
 694 (defvar *initialize-instance-simple-alist* nil)
 695 (defvar *note-iis-entry-p* nil)
 696
 697 (defvar *compiled-initialize-instance-simple-functions*
 698   (make-hash-table :test 'equal))
 699
 700 (defun initialize-instance-simple-function (use info class form-list)
 701   (let* ((pv-cell (get-pv-cell-for-class class))
 702          (key (initialize-info-key info))
 703          (sf-key (list* use (class-name (car key)) (cdr key))))
 704     (if (or *compile-make-instance-functions-p*
 705             (gethash sf-key *compiled-initialize-instance-simple-functions*))
 706         (multiple-value-bind (form args)
 707             (form-list-to-lisp pv-cell form-list)
 708           (let ((entry (assoc form *initialize-instance-simple-alist*
 709                               :test #'equal)))
 710             (setf (gethash sf-key
 711                            *compiled-initialize-instance-simple-functions*)
 712                   t)
 713             (if entry
 714                 (setf (cdddr entry) (union (list sf-key) (cdddr entry)
 715                                            :test #'equal))
 716                 (progn
 717                   (setq entry (list* form nil nil (list sf-key)))
 718                   (setq *initialize-instance-simple-alist*
 719                         (nconc *initialize-instance-simple-alist*
 720                                (list entry)))))
 721             (unless (or *note-iis-entry-p* (cadr entry))
 722               (setf (cadr entry) (compile nil (car entry))))
 723             (if (cadr entry)
 724                 (apply (the function (cadr entry)) args)
 725                 `(call-initialize-instance-simple ,pv-cell ,form-list))))
 726         #||
 727         #'(lambda (instance initargs)
 728             (initialize-instance-simple pv-cell form-list instance initargs))
 729         ||#
 730         `(call-initialize-instance-simple ,pv-cell ,form-list))))
 731
 732 (defun load-precompiled-iis-entry (form function system uses)
 733   (let ((entry (assoc form *initialize-instance-simple-alist*
 734                       :test #'equal)))
 735     (unless entry
 736       (setq entry (list* form nil nil nil))
 737       (setq *initialize-instance-simple-alist*
 738             (nconc *initialize-instance-simple-alist*
 739                    (list entry))))
 740     (setf (cadr entry) function)
 741     (setf (caddr entry) system)
 742     (dolist (use uses)
 743       (setf (gethash use *compiled-initialize-instance-simple-functions*) t))
 744     (setf (cdddr entry) (union uses (cdddr entry)
 745                                :test #'equal))))
 746
 747 (defmacro precompile-iis-functions (&optional system)
 748   `(progn
 749     ,@(let (collect)
 750         (dolist (iis-entry *initialize-instance-simple-alist*)
 751           (when (or (null (caddr iis-entry))
 752                     (eq (caddr iis-entry) system))
 753             (when system (setf (caddr iis-entry) system))
 754             (push `(load-precompiled-iis-entry
 755                     ',(car iis-entry)
 756                     #',(car iis-entry)
 757                     ',system
 758                     ',(cdddr iis-entry))
 759                   collect)))
 760         (nreverse collect))))
 761
 762 (defun compile-iis-functions (after-p)
 763   (let ((*compile-make-instance-functions-p* t)
 764         (*revert-initialize-info-p* t)
 765         (*note-iis-entry-p* (not after-p)))
 766     (declare (special *compile-make-instance-functions-p*))
 767     (when (eq *boot-state* 'complete)
 768       (update-make-instance-function-table))))
 769
 770 ;(const const)
 771 ;(funcall function)
 772 ;(push-initarg const)
 773 ;(pop-supplied count) ; a positive odd number
 774 ;(instance-set pv-offset slotd)
 775 ;(skip-when-instance-boundp pv-offset slotd n)
 776
 777 (defun initialize-instance-simple (pv-cell form-list instance initargs)
 778   (let ((pv (car pv-cell))
 779         (initargs-tail initargs)
 780         (slots (get-slots-or-nil instance))
 781         (class (class-of instance))
 782         value)
 783     (loop (when (null form-list) (return nil))
 784           (let ((form (pop form-list)))
 785             (ecase (car form)
 786               (push-initarg
 787                (push value initargs)
 788                (push (cadr form) initargs))
 789               (const
 790                (setq value (cadr form)))
 791               (funcall
 792                (setq value (funcall (the function (cadr form)))))
 793               (pop-initargs
 794                (setq initargs-tail (nthcdr (1- (cadr form)) initargs-tail))
 795                (setq value (pop initargs-tail)))
 796               (instance-set
 797                (instance-write-internal
 798                 pv slots (cadr form) value
 799                 (setf (slot-value-using-class class instance (caddr form))
 800                       value)))
 801               (skip-when-instance-boundp
 802                (when (instance-boundp-internal
 803                       pv slots (cadr form)
 804                       (slot-boundp-using-class class instance (caddr form)))
 805                  (dotimes-fixnum (i (cadddr form))
 806                    (pop form-list))))
 807               (update-initialize-info-cache
 808                (when (consp initargs)
 809                  (setq initargs (cons (car initargs) (cdr initargs))))
 810                (setq *initialize-info-cache-class* (cadr form))
 811                (setq *initialize-info-cache-initargs* initargs)
 812                (setq *initialize-info-cache-info* (caddr form)))
 813               (finish-pushing-initargs
 814                (setq initargs-tail initargs)))))
 815     initargs))
 816
 817 (defun add-to-cvector (cvector constant)
 818   (or (position constant cvector)
 819       (prog1 (fill-pointer cvector)
 820         (vector-push-extend constant cvector))))
 821
 822 (defvar *inline-iis-instance-locations-p* t)
 823
 824 (defun first-form-to-lisp (forms cvector pv)
 825   (flet ((const (constant)
 826            (cond ((or (numberp constant) (characterp constant))
 827                   constant)
 828                  ((and (symbolp constant) (symbol-package constant))
 829                   `',constant)
 830                  (t
 831                   `(svref cvector ,(add-to-cvector cvector constant))))))
 832     (let ((form (pop (car forms))))
 833       (ecase (car form)
 834         (push-initarg
 835          `((push value initargs)
 836            (push ,(const (cadr form)) initargs)))
 837         (const
 838          `((setq value ,(const (cadr form)))))
 839         (funcall
 840          `((setq value (funcall (the function ,(const (cadr form)))))))
 841         (pop-initargs
 842          `((setq initargs-tail (,@(let ((pop (1- (cadr form))))
 843                                     (case pop
 844                                       (1 `(cdr))
 845                                       (3 `(cdddr))
 846                                       (t `(nthcdr ,pop))))
 847                                 initargs-tail))
 848            (setq value (pop initargs-tail))))
 849         (instance-set
 850          (let* ((pv-offset (cadr form))
 851                 (location (pvref pv pv-offset))
 852                 (default `(setf (slot-value-using-class class instance
 853                                                         ,(const (caddr form)))
 854                                 value)))
 855            (if *inline-iis-instance-locations-p*
 856                (typecase location
 857                  (fixnum `((and slots
 858                                 (setf (clos-slots-ref slots ,(const location))
 859                                       value))))
 860                  (cons `((setf (cdr ,(const location)) value)))
 861                  (t `(,default)))
 862                `((instance-write-internal pv slots ,(const pv-offset) value
 863                   ,default
 864                   ,(typecase location
 865                      (fixnum ':instance)
 866                      (cons ':class)
 867                      (t ':default)))))))
 868         (skip-when-instance-boundp
 869          (let* ((pv-offset (cadr form))
 870                 (location (pvref pv pv-offset))
 871                 (default `(slot-boundp-using-class class instance
 872                            ,(const (caddr form)))))
 873            `((unless ,(if *inline-iis-instance-locations-p*
 874                           (typecase location
 875                             (fixnum `(not (and slots
 876                                                (eq (clos-slots-ref
 877                                                     slots
 878                                                     ,(const location))
 879                                                    +slot-unbound+))))
 880                             (cons `(not (eq (cdr ,(const location))
 881                                             +slot-unbound+)))
 882                             (t default))
 883                           `(instance-boundp-internal
 884                             pv slots ,(const pv-offset)
 885                             ,default
 886                             ,(typecase (pvref pv pv-offset)
 887                                (fixnum ':instance)
 888                                (cons ':class)
 889                                (t ':default))))
 890                ,@(let ((sforms (cons nil nil)))
 891                    (dotimes-fixnum (i (cadddr form) (car sforms))
 892                      (add-forms (first-form-to-lisp forms cvector pv)
 893                                 sforms)))))))
 894         (update-initialize-info-cache
 895          `((when (consp initargs)
 896              (setq initargs (cons (car initargs) (cdr initargs))))
 897            (setq *initialize-info-cache-class* ,(const (cadr form)))
 898            (setq *initialize-info-cache-initargs* initargs)
 899            (setq *initialize-info-cache-info* ,(const (caddr form)))))
 900         (finish-pushing-initargs
 901          `((setq initargs-tail initargs)))))))
 902
 903 (defmacro iis-body (&body forms)
 904   `(let ((initargs-tail initargs)
 905          (slots (get-slots-or-nil instance))
 906          (class (class-of instance))
 907          (pv (car pv-cell))
 908          value)
 909      initargs instance initargs-tail pv cvector slots class value
 910      ,@forms))
 911
 912 (defun form-list-to-lisp (pv-cell form-list)
 913   (let* ((forms (list form-list))
 914          (cvector (make-array (floor (length form-list) 2)
 915                               :fill-pointer 0 :adjustable t))
 916          (pv (car pv-cell))
 917          (body (let ((rforms (cons nil nil)))
 918                  (loop (when (null (car forms)) (return (car rforms)))
 919                        (add-forms (first-form-to-lisp forms cvector pv)
 920                                   rforms))))
 921          (cvector-type `(simple-vector ,(length cvector))))
 922     (values
 923      `(lambda (pv-cell cvector)
 924         (declare (type ,cvector-type cvector))
 925         #'(lambda (instance initargs)
 926             (declare #.*optimize-speed*)
 927             (iis-body ,@body)
 928             initargs))
 929      (list pv-cell (coerce cvector cvector-type)))))
 930 \f
 931 ;;; The effect of this is to cause almost all of the overhead of
 932 ;;; MAKE-INSTANCE to happen at load time (or maybe at precompile time,
 933 ;;; as explained in a previous message) rather than the first time
 934 ;;; that MAKE-INSTANCE is called with a given class-name and sequence
 935 ;;; of keywords.
 936
 937 ;;; This optimization applies only when the first argument and all the
 938 ;;; even numbered arguments are constants evaluating to interned
 939 ;;; symbols.
 940
 941 (declaim (ftype (function (t) symbol) get-make-instance-function-symbol))
 942
 943 (define-compiler-macro make-instance (&whole form &rest args)
 944   (declare (ignore args))
 945   (let* ((*make-instance-function-keys* nil)
 946          (expanded-form (expand-make-instance-form form)))
 947     (if expanded-form
 948         `(funcall (fdefinition
 949                    ;; The name is guaranteed to be fbound.
 950                    ;; Is there a way to declare this?
 951                    (load-time-value
 952                     (get-make-instance-function-symbol
 953                      ',(first *make-instance-function-keys*))))
 954                   ,@(cdr expanded-form))
 955         form)))
 956
 957 (defun get-make-instance-function-symbol (key)
 958   (get-make-instance-functions (list key))
 959   (make-instance-function-symbol key))