else if (or (null test) (funcall test (car more)))
collect (car more)))
+(defun constant-class-arg-p (form)
+ (and (constantp form)
+ (let ((constant (constant-form-value form)))
+ (or (and (symbolp constant)
+ (not (null (symbol-package constant))))
+ (classp form)))))
+
(defun constant-symbol-p (form)
(and (constantp form)
(let ((constant (constant-form-value form)))
(and (symbolp constant)
(not (null (symbol-package constant)))))))
-;;; somewhat akin to DEFAULT-INITARGS (SLOT-CLASS T T), but just
-;;; collecting the defaulted initargs for the call.
+;;; Somewhat akin to DEFAULT-INITARGS, but just collecting the defaulted
+;;; initargs for the call.
(defun ctor-default-initkeys (supplied-initargs class-default-initargs)
(loop for (key) in class-default-initargs
when (eq (getf supplied-initargs key '.not-there.) '.not-there.)
collect key))
+
+;;; Like DEFAULT-INITARGS, but return a list that can be spliced into source,
+;;; instead of a list with values already evaluated.
+(defun ctor-default-initargs (supplied-initargs class-default-initargs)
+ (loop for (key form fun) in class-default-initargs
+ when (eq (getf supplied-initargs key '.not-there.) '.not-there.)
+ append (list key (if (constantp form) form `(funcall ,fun)))
+ into default-initargs
+ finally
+ (return (append supplied-initargs default-initargs))))
\f
;;; *****************
;;; CTORS *********
;;; funcallable instance is set to it.
;;;
(!defstruct-with-alternate-metaclass ctor
- :slot-names (function-name class-name class initargs safe-p)
+ :slot-names (function-name class-or-name class initargs safe-p)
:boa-constructor %make-ctor
:superclass-name function
:metaclass-name static-classoid
:runtime-type-checks-p nil)
;;; List of all defined ctors.
-
(defvar *all-ctors* ())
(defun make-ctor-parameter-list (ctor)
;;; Keep this a separate function for testing.
(defun ensure-ctor (function-name class-name initargs safe-code-p)
- (unless (fboundp function-name)
- (make-ctor function-name class-name initargs safe-code-p)))
+ (with-world-lock ()
+ (if (fboundp function-name)
+ (the ctor (fdefinition function-name))
+ (make-ctor function-name class-name initargs safe-code-p))))
;;; Keep this a separate function for testing.
(defun make-ctor (function-name class-name initargs safe-p)
(without-package-locks ; for (setf symbol-function)
- (let ((ctor (%make-ctor function-name class-name nil initargs safe-p)))
- (push ctor *all-ctors*)
- (setf (fdefinition function-name) ctor)
- (install-initial-constructor ctor :force-p t)
- ctor)))
-
+ (let ((ctor (%make-ctor function-name class-name nil initargs safe-p)))
+ (install-initial-constructor ctor :force-p t)
+ (push ctor *all-ctors*)
+ (setf (fdefinition function-name) ctor)
+ ctor)))
+\f
+;;; *****************
+;;; Inline CTOR cache
+;;; *****************
+;;;
+;;; The cache starts out as a list of CTORs, sorted with the most recently
+;;; used CTORs near the head. If it expands too much, we switch to a vector
+;;; with a simple hashing scheme.
+
+;;; Find CTOR for KEY (which is a class or class name) in a list. If the CTOR
+;;; is in the list but not one of the 4 first ones, return a new list with the
+;;; found CTOR at the head. Thread-safe: the new list shares structure with
+;;; the old, but is not desctructively modified. Returning the old list for
+;;; hits close to the head reduces ping-ponging with multiple threads seeking
+;;; the same list.
+(defun find-ctor (key list)
+ (labels ((walk (tail from-head depth)
+ (declare (fixnum depth))
+ (if tail
+ (let ((ctor (car tail)))
+ (if (eq (ctor-class-or-name ctor) key)
+ (if (> depth 3)
+ (values ctor
+ (nconc (list ctor) (nreverse from-head) (cdr tail)))
+ (values ctor
+ list))
+ (walk (cdr tail)
+ (cons ctor from-head)
+ (logand #xf (1+ depth)))))
+ (values nil list))))
+ (walk list nil 0)))
+
+(declaim (inline sxhash-symbol-or-class))
+(defun sxhash-symbol-or-class (x)
+ (cond ((symbolp x) (sxhash x))
+ ((std-instance-p x) (std-instance-hash x))
+ ((fsc-instance-p x) (fsc-instance-hash x))
+ (t
+ (bug "Something strange where symbol or class expected."))))
+
+;;; Max number of CTORs kept in an inline list cache. Once this is
+;;; exceeded we switch to a table.
+(defconstant +ctor-list-max-size+ 12)
+;;; Max table size for CTOR cache. If the table fills up at this size
+;;; we keep the same size and drop 50% of the old entries.
+(defconstant +ctor-table-max-size+ (expt 2 8))
+;;; Even if there is space in the cache, if we cannot fit a new entry
+;;; with max this number of collisions we expand the table (if possible)
+;;; and rehash.
+(defconstant +ctor-table-max-probe-depth+ 5)
+
+(defun make-ctor-table (size)
+ (declare (index size))
+ (let ((real-size (power-of-two-ceiling size)))
+ (if (< real-size +ctor-table-max-size+)
+ (values (make-array real-size :initial-element nil) nil)
+ (values (make-array +ctor-table-max-size+ :initial-element nil) t))))
+
+(declaim (inline mix-ctor-hash))
+(defun mix-ctor-hash (hash base)
+ (logand most-positive-fixnum (+ hash base 1)))
+
+(defun put-ctor (ctor table)
+ (cond ((try-put-ctor ctor table)
+ (values ctor table))
+ (t
+ (expand-ctor-table ctor table))))
+
+;;; Thread-safe: if two threads write to the same index in parallel, the other
+;;; result is just lost. This is not an issue as the CTORs are used as their
+;;; own keys. If both were EQ, we're good. If non-EQ, the next time the other
+;;; one is needed we just cache it again -- hopefully not getting stomped on
+;;; that time.
+(defun try-put-ctor (ctor table)
+ (declare (simple-vector table) (optimize speed))
+ (let* ((class (ctor-class-or-name ctor))
+ (base (sxhash-symbol-or-class class))
+ (hash base)
+ (mask (1- (length table))))
+ (declare (fixnum base hash mask))
+ (loop repeat +ctor-table-max-probe-depth+
+ do (let* ((index (logand mask hash))
+ (old (aref table index)))
+ (cond ((and old (neq class (ctor-class-or-name old)))
+ (setf hash (mix-ctor-hash hash base)))
+ (t
+ (setf (aref table index) ctor)
+ (return-from try-put-ctor t)))))
+ ;; Didn't fit, must expand
+ nil))
+
+(defun get-ctor (class table)
+ (declare (simple-vector table) (optimize speed))
+ (let* ((base (sxhash-symbol-or-class class))
+ (hash base)
+ (mask (1- (length table))))
+ (declare (fixnum base hash mask))
+ (loop repeat +ctor-table-max-probe-depth+
+ do (let* ((index (logand mask hash))
+ (old (aref table index)))
+ (if (and old (eq class (ctor-class-or-name old)))
+ (return-from get-ctor old)
+ (setf hash (mix-ctor-hash hash base)))))
+ ;; Nothing.
+ nil))
+
+;;; Thread safe: the old table is read, but if another thread mutates
+;;; it while we're reading we still get a sane result -- either the old
+;;; or the new entry. The new table is locally allocated, so that's ok
+;;; too.
+(defun expand-ctor-table (ctor old)
+ (declare (simple-vector old))
+ (let* ((old-size (length old))
+ (new-size (* 2 old-size))
+ (drop-random-entries nil))
+ (tagbody
+ :again
+ (multiple-value-bind (new max-size-p) (make-ctor-table new-size)
+ (let ((action (if drop-random-entries
+ ;; Same logic as in method caches -- see comment
+ ;; there.
+ (randomly-punting-lambda (old-ctor)
+ (try-put-ctor old-ctor new))
+ (lambda (old-ctor)
+ (unless (try-put-ctor old-ctor new)
+ (if max-size-p
+ (setf drop-random-entries t)
+ (setf new-size (* 2 new-size)))
+ (go :again))))))
+ (aver (try-put-ctor ctor new))
+ (dotimes (i old-size)
+ (let ((old-ctor (aref old i)))
+ (when old-ctor
+ (funcall action old-ctor))))
+ (return-from expand-ctor-table (values ctor new)))))))
+
+(defun ctor-list-to-table (list)
+ (let ((table (make-ctor-table (length list))))
+ (dolist (ctor list)
+ (setf table (nth-value 1 (put-ctor ctor table))))
+ table))
+
+(defun ensure-cached-ctor (class-name store initargs safe-code-p)
+ (flet ((maybe-ctor-for-caching ()
+ (if (typep class-name '(or symbol class))
+ (let ((name (make-ctor-function-name class-name initargs safe-code-p)))
+ (ensure-ctor name class-name initargs safe-code-p))
+ ;; Invalid first argument: let MAKE-INSTANCE worry about it.
+ (return-from ensure-cached-ctor
+ (values (lambda (&rest ctor-parameters)
+ (let (mi-initargs)
+ (doplist (key value) initargs
+ (push key mi-initargs)
+ (push (if (constantp value)
+ value
+ (pop ctor-parameters))
+ mi-initargs))
+ (apply #'make-instance class-name (nreverse mi-initargs))))
+ store)))))
+ (if (listp store)
+ (multiple-value-bind (ctor list) (find-ctor class-name store)
+ (if ctor
+ (values ctor list)
+ (let ((ctor (maybe-ctor-for-caching)))
+ (if (< (length list) +ctor-list-max-size+)
+ (values ctor (cons ctor list))
+ (values ctor (ctor-list-to-table list))))))
+ (let ((ctor (get-ctor class-name store)))
+ (if ctor
+ (values ctor store)
+ (put-ctor (maybe-ctor-for-caching) store))))))
\f
;;; ***********************************************
;;; Compile-Time Expansion of MAKE-INSTANCE *******
;;; ***********************************************
+(defvar *compiling-optimized-constructor* nil)
+
(define-compiler-macro make-instance (&whole form &rest args &environment env)
(declare (ignore args))
- (or (make-instance->constructor-call form (safe-code-p env))
+ ;; Compiling an optimized constructor for a non-standard class means compiling a
+ ;; lambda with (MAKE-INSTANCE #<SOME-CLASS X> ...) in it -- need
+ ;; to make sure we don't recurse there.
+ (or (unless *compiling-optimized-constructor*
+ (make-instance->constructor-call form (safe-code-p env)))
form))
(defun make-instance->constructor-call (form safe-code-p)
- (destructuring-bind (fn class-name &rest args) form
- (declare (ignore fn))
+ (destructuring-bind (class-arg &rest args) (cdr form)
(flet (;;
;; Return the name of parameter number I of a constructor
;; function.
(if (array-in-bounds-p ps i)
(aref ps i)
(format-symbol *pcl-package* ".P~D." i))))
- ;; Check if CLASS-NAME is a constant symbol. Give up if
+ ;; Check if CLASS-ARG is a constant symbol. Give up if
;; not.
- (check-class ()
- (unless (and class-name (constant-symbol-p class-name))
- (return-from make-instance->constructor-call nil)))
+ (constant-class-p ()
+ (and class-arg (constant-class-arg-p class-arg)))
;; Check if ARGS are suitable for an optimized constructor.
;; Return NIL from the outer function if not.
(check-args ()
(loop for (key . more) on args by #'cddr do
- (when (or (null more)
- (not (constant-symbol-p key))
- (eq :allow-other-keys (constant-form-value key)))
- (return-from make-instance->constructor-call nil)))))
- (check-class)
+ (when (or (null more)
+ (not (constant-symbol-p key))
+ (eq :allow-other-keys (constant-form-value key)))
+ (return-from make-instance->constructor-call nil)))))
(check-args)
;; Collect a plist of initargs and constant values/parameter names
;; in INITARGS. Collect non-constant initialization forms in
(loop for (key value) on args by #'cddr and i from 0
collect (constant-form-value key) into initargs
if (constantp value)
- collect value into initargs
+ collect value into initargs
else
- collect (parameter-name i) into initargs
- and collect value into value-forms
+ collect (parameter-name i) into initargs
+ and collect value into value-forms
finally
- (return (values initargs value-forms)))
- (let* ((class-name (constant-form-value class-name))
- (function-name (make-ctor-function-name class-name initargs
- safe-code-p)))
- ;; Prevent compiler warnings for calling the ctor.
- (proclaim-as-fun-name function-name)
- (note-name-defined function-name :function)
- (when (eq (info :function :where-from function-name) :assumed)
- (setf (info :function :where-from function-name) :defined)
- (when (info :function :assumed-type function-name)
- (setf (info :function :assumed-type function-name) nil)))
- ;; Return code constructing a ctor at load time, which, when
- ;; called, will set its funcallable instance function to an
- ;; optimized constructor function.
- `(locally
- (declare (disable-package-locks ,function-name))
- (let ((.x. (load-time-value
- (ensure-ctor ',function-name ',class-name ',initargs
- ',safe-code-p))))
- (declare (ignore .x.))
- ;; ??? check if this is worth it.
- (declare
- (ftype (or (function ,(make-list (length value-forms)
- :initial-element t)
- t)
- (function (&rest t) t))
- ,function-name))
- (funcall (function ,function-name) ,@value-forms))))))))
-
+ (return (values initargs value-forms)))
+ (if (constant-class-p)
+ (let* ((class-or-name (constant-form-value class-arg))
+ (function-name (make-ctor-function-name class-or-name initargs
+ safe-code-p)))
+ ;; Prevent compiler warnings for calling the ctor.
+ (proclaim-as-fun-name function-name)
+ (note-name-defined function-name :function)
+ (when (eq (info :function :where-from function-name) :assumed)
+ (setf (info :function :where-from function-name) :defined)
+ (when (info :function :assumed-type function-name)
+ (setf (info :function :assumed-type function-name) nil)))
+ ;; Return code constructing a ctor at load time, which, when
+ ;; called, will set its funcallable instance function to an
+ ;; optimized constructor function.
+ `(locally
+ (declare (disable-package-locks ,function-name))
+ (let ((.x. (load-time-value
+ (ensure-ctor ',function-name ',class-or-name ',initargs
+ ',safe-code-p))))
+ (declare (ignore .x.))
+ ;; ??? check if this is worth it.
+ (declare
+ (ftype (or (function ,(make-list (length value-forms)
+ :initial-element t)
+ t)
+ (function (&rest t) t))
+ ,function-name))
+ (funcall (function ,function-name) ,@value-forms))))
+ (when (and class-arg (not (constantp class-arg)))
+ ;; Build an inline cache: a CONS, with the actual cache in the CDR.
+ `(locally (declare (disable-package-locks .cache. .class-arg. .store. .fun.
+ make-instance))
+ (let* ((.cache. (load-time-value (cons 'ctor-cache nil)))
+ (.store. (cdr .cache.))
+ (.class-arg. ,class-arg))
+ (multiple-value-bind (.fun. .new-store.)
+ (ensure-cached-ctor .class-arg. .store. ',initargs ',safe-code-p)
+ ;; Thread safe: if multiple threads hit this in paralle, the update
+ ;; from the other one is just lost -- no harm done, except for the
+ ;; need to redo the work next time.
+ (unless (eq .store. .new-store.)
+ (setf (cdr .cache.) .new-store.))
+ (funcall (truly-the function .fun.) ,@value-forms))))))))))
\f
;;; **************************************************
;;; Load-Time Constructor Function Generation *******
(defvar *the-system-si-method* nil)
(defun install-optimized-constructor (ctor)
- (let ((class (find-class (ctor-class-name ctor))))
- (unless (class-finalized-p class)
- (finalize-inheritance class))
- ;; We can have a class with an invalid layout here. Such a class
- ;; cannot have a LAYOUT-INVALID of (:FLUSH ...) or (:OBSOLETE
- ;; ...), because part of the deal is that those only happen from
- ;; FORCE-CACHE-FLUSHES, which create a new valid wrapper for the
- ;; class. An invalid layout of T needs to be flushed, however.
- (when (eq (layout-invalid (class-wrapper class)) t)
- (force-cache-flushes class))
- (setf (ctor-class ctor) class)
- (pushnew ctor (plist-value class 'ctors) :test #'eq)
- (setf (funcallable-instance-fun ctor)
- (multiple-value-bind (form locations names)
- (constructor-function-form ctor)
- (apply (compile nil `(lambda ,names ,form)) locations)))))
+ (with-world-lock ()
+ (let* ((class-or-name (ctor-class-or-name ctor))
+ (class (if (symbolp class-or-name)
+ (find-class class-or-name)
+ class-or-name)))
+ (unless (class-finalized-p class)
+ (finalize-inheritance class))
+ ;; We can have a class with an invalid layout here. Such a class
+ ;; cannot have a LAYOUT-INVALID of (:FLUSH ...) or (:OBSOLETE
+ ;; ...), because part of the deal is that those only happen from
+ ;; FORCE-CACHE-FLUSHES, which create a new valid wrapper for the
+ ;; class. An invalid layout of T needs to be flushed, however.
+ (when (eq (layout-invalid (class-wrapper class)) t)
+ (%force-cache-flushes class))
+ (setf (ctor-class ctor) class)
+ (pushnew ctor (plist-value class 'ctors) :test #'eq)
+ (setf (funcallable-instance-fun ctor)
+ (multiple-value-bind (form locations names)
+ (constructor-function-form ctor)
+ (apply
+ (let ((*compiling-optimized-constructor* t))
+ (handler-bind ((compiler-note #'muffle-warning))
+ (compile nil `(lambda ,names ,form))))
+ locations))))))
(defun constructor-function-form (ctor)
(let* ((class (ctor-class ctor))
;; MAKE-INSTANCE and/or ALLOCATE-INSTANCE, these will show up
;; together with the system-defined ones in what
;; COMPUTE-APPLICABLE-METHODS returns.
- (if (and (not (structure-class-p class))
- (not (condition-class-p class))
- (null (cdr make-instance-methods))
- (null (cdr allocate-instance-methods))
- (every (lambda (x)
- (member (slot-definition-allocation x)
- '(:instance :class)))
- (class-slots class))
- (null (check-initargs-1
- class
- (append
- (ctor-default-initkeys
- (ctor-initargs ctor) (class-default-initargs class))
- (plist-keys (ctor-initargs ctor)))
- (append ii-methods si-methods) nil nil))
- (not (around-or-nonstandard-primary-method-p
- ii-methods *the-system-ii-method*))
- (not (around-or-nonstandard-primary-method-p
- si-methods *the-system-si-method*))
- ;; the instance structure protocol goes through
- ;; slot-value(-using-class) and friends (actually just
- ;; (SETF SLOT-VALUE-USING-CLASS) and
- ;; SLOT-BOUNDP-USING-CLASS), so if there are non-standard
- ;; applicable methods we can't shortcircuit them.
- (every (lambda (x) (= (length x) 1)) setf-svuc-slots-methods)
- (every (lambda (x) (= (length x) 1)) sbuc-slots-methods))
- (optimizing-generator ctor ii-methods si-methods)
- (fallback-generator ctor ii-methods si-methods))))
+ (let ((maybe-invalid-initargs
+ (check-initargs-1
+ class
+ (append
+ (ctor-default-initkeys
+ (ctor-initargs ctor) (class-default-initargs class))
+ (plist-keys (ctor-initargs ctor)))
+ (append ii-methods si-methods) nil nil))
+ (custom-make-instance
+ (not (null (cdr make-instance-methods)))))
+ (if (and (not (structure-class-p class))
+ (not (condition-class-p class))
+ (not custom-make-instance)
+ (null (cdr allocate-instance-methods))
+ (every (lambda (x)
+ (member (slot-definition-allocation x)
+ '(:instance :class)))
+ (class-slots class))
+ (not maybe-invalid-initargs)
+ (not (around-or-nonstandard-primary-method-p
+ ii-methods *the-system-ii-method*))
+ (not (around-or-nonstandard-primary-method-p
+ si-methods *the-system-si-method*))
+ ;; the instance structure protocol goes through
+ ;; slot-value(-using-class) and friends (actually just
+ ;; (SETF SLOT-VALUE-USING-CLASS) and
+ ;; SLOT-BOUNDP-USING-CLASS), so if there are non-standard
+ ;; applicable methods we can't shortcircuit them.
+ (every (lambda (x) (= (length x) 1)) setf-svuc-slots-methods)
+ (every (lambda (x) (= (length x) 1)) sbuc-slots-methods))
+ (optimizing-generator ctor ii-methods si-methods)
+ (fallback-generator ctor ii-methods si-methods
+ (or maybe-invalid-initargs custom-make-instance))))))
(defun around-or-nonstandard-primary-method-p
(methods &optional standard-method)
when (null qualifiers) do
(setq primary-checked-p t)))
-(defun fallback-generator (ctor ii-methods si-methods)
+(defun fallback-generator (ctor ii-methods si-methods use-make-instance)
(declare (ignore ii-methods si-methods))
- `(lambda ,(make-ctor-parameter-list ctor)
- ;; The CTOR MAKE-INSTANCE optimization only kicks in when the
- ;; first argument to MAKE-INSTANCE is a constant symbol: by
- ;; calling it with a class, as here, we inhibit the optimization,
- ;; so removing the possibility of endless recursion. -- CSR,
- ;; 2004-07-12
- (make-instance ,(ctor-class ctor)
- ,@(quote-plist-keys (ctor-initargs ctor)))))
+ (let ((class (ctor-class ctor))
+ (lambda-list (make-ctor-parameter-list ctor))
+ (initargs (quote-plist-keys (ctor-initargs ctor))))
+ (if use-make-instance
+ `(lambda ,lambda-list
+ (declare #.*optimize-speed*)
+ ;; The CTOR MAKE-INSTANCE optimization checks for
+ ;; *COMPILING-OPTIMIZED-CONSTRUCTOR* which is bound around compilation of
+ ;; the constructor, hence avoiding the possibility of endless recursion.
+ (make-instance ,class ,@initargs))
+ (let ((defaults (class-default-initargs class)))
+ (when defaults
+ (setf initargs (ctor-default-initargs initargs defaults)))
+ `(lambda ,lambda-list
+ (declare #.*optimize-speed*)
+ (fast-make-instance ,class ,@initargs))))))
+
+;;; Not as good as the real optimizing generator, but faster than going
+;;; via MAKE-INSTANCE: 1 GF call less, and no need to check initargs.
+(defun fast-make-instance (class &rest initargs)
+ (declare #.*optimize-speed*)
+ (declare (dynamic-extent initargs))
+ (let ((.instance. (apply #'allocate-instance class initargs)))
+ (apply #'initialize-instance .instance. initargs)
+ .instance.))
(defun optimizing-generator (ctor ii-methods si-methods)
(multiple-value-bind (locations names body before-method-p)
;; NAME must have been specified.
(setf-find-class
(loop for ctor in *all-ctors*
- when (eq (ctor-class-name ctor) name) do
+ when (eq (ctor-class-or-name ctor) name) do
(when (ctor-class ctor)
(reset (ctor-class ctor)))
(loop-finish)))
(flet ((class-of-1st-method-param (method)
(type-class (first (method-specializers method)))))
(case (generic-function-name generic-function)
- ((make-instance allocate-instance
- initialize-instance shared-initialize)
+ ((make-instance allocate-instance)
+ ;; FIXME: I can't see a way of working out which classes a
+ ;; given metaclass specializer are applicable to short of
+ ;; iterating and testing with class-of. It would be good
+ ;; to not invalidate caches of system classes at this
+ ;; point (where it is not legal to define a method
+ ;; applicable to them on system functions). -- CSR,
+ ;; 2010-07-13
+ (reset (find-class 'standard-object) t t))
+ ((initialize-instance shared-initialize)
(reset (class-of-1st-method-param method) t t))
((reinitialize-instance)
(reset (class-of-1st-method-param method) t nil))
(defun precompile-ctors ()
(dolist (ctor *all-ctors*)
(when (null (ctor-class ctor))
- (let ((class (find-class (ctor-class-name ctor) nil)))
+ (let ((class (find-class (ctor-class-or-name ctor) nil)))
(when (and class (class-finalized-p class))
(install-optimized-constructor ctor))))))
(defun check-ri-initargs (instance initargs)
(let* ((class (class-of instance))
(keys (plist-keys initargs))
- (cached (assoc keys (plist-value class 'ri-initargs)
- :test #'equal))
+ (cache (plist-value class 'ri-initargs))
+ (cached (assoc keys cache :test #'equal))
(invalid-keys
(if (consp cached)
(cdr cached)
(list* 'shared-initialize instance nil initargs))
t nil)))
(setf (plist-value class 'ri-initargs)
- (acons keys invalid cached))
+ (acons keys invalid cache))
invalid))))
(when invalid-keys
(error 'initarg-error :class class :initargs invalid-keys))))
projects / sbcl.git / blobdiff