(package-hashtable-free table)
(package-hashtable-deleted table))))
-;;; the maximum density we allow in a package hashtable
-(defconstant package-rehash-threshold 0.75)
+;;; the maximum load factor we allow in a package hashtable
+(defconstant +package-rehash-threshold+ 0.75)
+
+;;; the load factor desired for a package hashtable when writing a
+;;; core image
+(defconstant +package-hashtable-image-load-factor+ 0.5)
+
+;;; All destructive package modifications are serialized on this lock.
+(defvar *package-lock*)
+
+(!cold-init-forms
+ (setf *package-lock* (sb!thread::make-spinlock :name "Package Lock")))
+
+(defmacro with-packages ((&key) &body forms)
+ `(sb!thread::with-recursive-spinlock (*package-lock*)
+ ,@forms))
;;; Make a package hashtable having a prime number of entries at least
-;;; as great as (/ SIZE PACKAGE-REHASH-THRESHOLD). If RES is supplied,
+;;; as great as (/ SIZE +PACKAGE-REHASH-THRESHOLD+). If RES is supplied,
;;; then it is destructively modified to produce the result. This is
;;; useful when changing the size, since there are many pointers to
;;; the hashtable.
+;;; Actually, the smallest table built here has three entries. This
+;;; is necessary because the double hashing step size is calculated
+;;; using a division by the table size minus two.
(defun make-or-remake-package-hashtable (size
&optional
res)
(flet ((actual-package-hashtable-size (size)
(loop for n of-type fixnum
- from (logior (truncate size package-rehash-threshold) 1)
+ from (logior (ceiling size +package-rehash-threshold+) 1)
by 2
when (positive-primep n) return n)))
(let* ((n (actual-package-hashtable-size size))
- (size (truncate (* n package-rehash-threshold)))
+ (size (truncate (* n +package-rehash-threshold+)))
(table (make-array n))
(hash (make-array n
:element-type '(unsigned-byte 8)
(package-hashtable-deleted res) 0)
(setf res (%make-package-hashtable table hash size)))
res)))
+
+;;; Destructively resize TABLE to have room for at least SIZE entries
+;;; and rehash its existing entries.
+(defun resize-package-hashtable (table size)
+ (let* ((vec (package-hashtable-table table))
+ (hash (package-hashtable-hash table))
+ (len (length vec)))
+ (make-or-remake-package-hashtable size table)
+ (dotimes (i len)
+ (when (> (aref hash i) 1)
+ (add-symbol table (svref vec i))))))
\f
;;;; package locking operations, built conditionally on :sb-package-locks
;;; Make a package name into a simple-string.
(defun package-namify (n)
- (stringify-name n "package"))
+ (stringify-package-designator n))
;;; ANSI specifies (in the definition of DELETE-PACKAGE) that PACKAGE-NAME
;;; returns NIL (not an error) for a deleted package, so this is a special
;;; Add a symbol to a package hashtable. The symbol is assumed
;;; not to be present.
(defun add-symbol (table symbol)
+ (when (zerop (package-hashtable-free table))
+ ;; The hashtable is full. Resize it to be able to hold twice the
+ ;; amount of symbols than it currently contains. The actual new size
+ ;; can be smaller than twice the current size if the table contained
+ ;; deleted entries.
+ (resize-package-hashtable table
+ (* (- (package-hashtable-size table)
+ (package-hashtable-deleted table))
+ 2)))
(let* ((vec (package-hashtable-table table))
(hash (package-hashtable-hash table))
(len (length vec))
(sxhash (%sxhash-simple-string (symbol-name symbol)))
- (h2 (the fixnum (1+ (the fixnum (rem sxhash
- (the fixnum (- len 2))))))))
- (declare (fixnum len sxhash h2))
- (cond ((zerop (the fixnum (package-hashtable-free table)))
- (make-or-remake-package-hashtable (* (package-hashtable-size table)
- 2)
- table)
- (add-symbol table symbol)
- (dotimes (i len)
- (declare (fixnum i))
- (when (> (the fixnum (aref hash i)) 1)
- (add-symbol table (svref vec i)))))
- (t
- (do ((i (rem sxhash len) (rem (+ i h2) len)))
- ((< (the fixnum (aref hash i)) 2)
- (if (zerop (the fixnum (aref hash i)))
- (decf (package-hashtable-free table))
- (decf (package-hashtable-deleted table)))
- (setf (svref vec i) symbol)
- (setf (aref hash i)
- (entry-hash (length (symbol-name symbol))
- sxhash)))
- (declare (fixnum i)))))))
+ (h2 (1+ (rem sxhash (- len 2)))))
+ (declare (fixnum sxhash h2))
+ (do ((i (rem sxhash len) (rem (+ i h2) len)))
+ ((< (the fixnum (aref hash i)) 2)
+ (if (zerop (the fixnum (aref hash i)))
+ (decf (package-hashtable-free table))
+ (decf (package-hashtable-deleted table)))
+ (setf (svref vec i) symbol)
+ (setf (aref hash i)
+ (entry-hash (length (symbol-name symbol))
+ sxhash)))
+ (declare (fixnum i)))))
+
+;;; Resize the package hashtables of all packages so that their load
+;;; factor is +PACKAGE-HASHTABLE-IMAGE-LOAD-FACTOR+. Called from
+;;; SAVE-LISP-AND-DIE to optimize space usage in the image.
+(defun tune-hashtable-sizes-of-all-packages ()
+ (flet ((tune-table-size (table)
+ (resize-package-hashtable
+ table
+ (round (* (/ +package-rehash-threshold+
+ +package-hashtable-image-load-factor+)
+ (- (package-hashtable-size table)
+ (package-hashtable-free table)
+ (package-hashtable-deleted table)))))))
+ (dolist (package (list-all-packages))
+ (tune-table-size (package-internal-symbols package))
+ (tune-table-size (package-external-symbols package)))))
;;; Find where the symbol named STRING is stored in TABLE. INDEX-VAR
;;; is bound to the index, or NIL if it is not present. SYMBOL-VAR
(with-symbol (index symbol table string length hash ehash)
(setf (aref (package-hashtable-hash table) index) 1)
(setf (aref (package-hashtable-table table) index) nil)
- (incf (package-hashtable-deleted table)))))
+ (incf (package-hashtable-deleted table))))
+ ;; If the table is less than one quarter full, halve its size and
+ ;; rehash the entries.
+ (let* ((size (package-hashtable-size table))
+ (deleted (package-hashtable-deleted table))
+ (used (- size
+ (package-hashtable-free table)
+ deleted)))
+ (declare (type fixnum size deleted used))
+ (when (< used (truncate size 4))
+ (resize-package-hashtable table (* used 2)))))
\f
;;; Enter any new NICKNAMES for PACKAGE into *PACKAGE-NAMES*.
;;; If there is a conflict then give the user a chance to do
(external-symbols 10))
#!+sb-doc
#.(format nil
- "Make a new package having the specified NAME, NICKNAMES, and
- USE list. :INTERNAL-SYMBOLS and :EXTERNAL-SYMBOLS are
- estimates for the number of internal and external symbols which
- will ultimately be present in the package. The default value of
- USE is implementation-dependent, and in this implementation
- it is ~S."
- *default-package-use-list*)
-
- ;; Check for package name conflicts in name and nicknames, then
- ;; make the package.
- (when (find-package name)
- ;; ANSI specifies that this error is correctable.
- (cerror "Leave existing package alone."
- "A package named ~S already exists" name))
- (let* ((name (package-namify name))
- (package (internal-make-package
- :%name name
- :internal-symbols (make-or-remake-package-hashtable
- internal-symbols)
- :external-symbols (make-or-remake-package-hashtable
- external-symbols))))
-
- ;; Do a USE-PACKAGE for each thing in the USE list so that checking for
- ;; conflicting exports among used packages is done.
- (if *in-package-init*
- (push (list use package) *!deferred-use-packages*)
- (use-package use package))
-
- ;; FIXME: ENTER-NEW-NICKNAMES can fail (ERROR) if nicknames are illegal,
- ;; which would leave us with possibly-bad side effects from the earlier
- ;; USE-PACKAGE (e.g. this package on the used-by lists of other packages,
- ;; but not in *PACKAGE-NAMES*, and possibly import side effects too?).
- ;; Perhaps this can be solved by just moving ENTER-NEW-NICKNAMES before
- ;; USE-PACKAGE, but I need to check what kinds of errors can be caused by
- ;; USE-PACKAGE, too.
- (enter-new-nicknames package nicknames)
- (setf (gethash name *package-names*) package)))
+ "Make a new package having the specified NAME, NICKNAMES, and USE
+list. :INTERNAL-SYMBOLS and :EXTERNAL-SYMBOLS are estimates for the number of
+internal and external symbols which will ultimately be present in the package.
+The default value of USE is implementation-dependent, and in this
+implementation it is ~S." *default-package-use-list*)
+ (with-packages ()
+ ;; Check for package name conflicts in name and nicknames, then
+ ;; make the package.
+ (when (find-package name)
+ ;; ANSI specifies that this error is correctable.
+ (cerror "Leave existing package alone."
+ "A package named ~S already exists" name))
+ (let* ((name (package-namify name))
+ (package (internal-make-package
+ :%name name
+ :internal-symbols (make-or-remake-package-hashtable
+ internal-symbols)
+ :external-symbols (make-or-remake-package-hashtable
+ external-symbols))))
+
+ ;; Do a USE-PACKAGE for each thing in the USE list so that checking for
+ ;; conflicting exports among used packages is done.
+ (if *in-package-init*
+ (push (list use package) *!deferred-use-packages*)
+ (use-package use package))
+
+ ;; FIXME: ENTER-NEW-NICKNAMES can fail (ERROR) if nicknames are illegal,
+ ;; which would leave us with possibly-bad side effects from the earlier
+ ;; USE-PACKAGE (e.g. this package on the used-by lists of other packages,
+ ;; but not in *PACKAGE-NAMES*, and possibly import side effects too?).
+ ;; Perhaps this can be solved by just moving ENTER-NEW-NICKNAMES before
+ ;; USE-PACKAGE, but I need to check what kinds of errors can be caused by
+ ;; USE-PACKAGE, too.
+ (enter-new-nicknames package nicknames)
+ (setf (gethash name *package-names*) package))))
;;; Change the name if we can, blast any old nicknames and then
;;; add in any new ones.
(defun rename-package (package name &optional (nicknames ()))
#!+sb-doc
"Changes the name and nicknames for a package."
- (let* ((package (find-undeleted-package-or-lose package))
- (name (package-namify name))
- (found (find-package name))
- (nicks (mapcar #'string nicknames)))
- (unless (or (not found) (eq found package))
- (error 'simple-package-error
- :package name
- :format-control "A package named ~S already exists."
- :format-arguments (list name)))
- (with-single-package-locked-error ()
+ (with-packages ()
+ (let* ((package (find-undeleted-package-or-lose package))
+ (name (package-namify name))
+ (found (find-package name))
+ (nicks (mapcar #'string nicknames)))
+ (unless (or (not found) (eq found package))
+ (error 'simple-package-error
+ :package name
+ :format-control "A package named ~S already exists."
+ :format-arguments (list name)))
+ (with-single-package-locked-error ()
(unless (and (string= name (package-name package))
(null (set-difference nicks (package-nicknames package)
- :test #'string=)))
+ :test #'string=)))
(assert-package-unlocked package "rename as ~A~@[ with nickname~P ~
~{~A~^, ~}~]"
name (length nicks) nicks))
- ;; do the renaming
- (remhash (package-%name package) *package-names*)
- (dolist (n (package-%nicknames package))
- (remhash n *package-names*))
- (setf (package-%name package) name
- (gethash name *package-names*) package
- (package-%nicknames package) ())
- (enter-new-nicknames package nicknames))
- package))
+ ;; do the renaming
+ (remhash (package-%name package) *package-names*)
+ (dolist (n (package-%nicknames package))
+ (remhash n *package-names*))
+ (setf (package-%name package) name
+ (gethash name *package-names*) package
+ (package-%nicknames package) ())
+ (enter-new-nicknames package nicknames))
+ package)))
(defun delete-package (package-designator)
#!+sb-doc
"Delete the package designated by PACKAGE-DESIGNATOR from the package
system data structures."
- (let ((package (if (packagep package-designator)
- package-designator
- (find-package package-designator))))
- (cond ((not package)
- ;; This continuable error is required by ANSI.
- (cerror
- "Return ~S."
- (make-condition
- 'simple-package-error
- :package package-designator
- :format-control "There is no package named ~S."
- :format-arguments (list package-designator))
- nil))
- ((not (package-name package)) ; already deleted
- nil)
- (t
- (with-single-package-locked-error
- (:package package "deleting package ~A" package)
- (let ((use-list (package-used-by-list package)))
- (when use-list
- ;; This continuable error is specified by ANSI.
- (cerror
- "Remove dependency in other packages."
- (make-condition
- 'simple-package-error
- :package package
- :format-control
- "~@<Package ~S is used by package~P:~2I~_~S~@:>"
- :format-arguments (list (package-name package)
- (length use-list)
- (mapcar #'package-name use-list))))
- (dolist (p use-list)
- (unuse-package package p))))
- (dolist (used (package-use-list package))
- (unuse-package used package))
- (do-symbols (sym package)
- (unintern sym package))
- (remhash (package-name package) *package-names*)
- (dolist (nick (package-nicknames package))
- (remhash nick *package-names*))
- (setf (package-%name package) nil
- ;; Setting PACKAGE-%NAME to NIL is required in order to
- ;; make PACKAGE-NAME return NIL for a deleted package as
- ;; ANSI requires. Setting the other slots to NIL
- ;; and blowing away the PACKAGE-HASHTABLES is just done
- ;; for tidiness and to help the GC.
- (package-%nicknames package) nil
- (package-%use-list package) nil
- (package-tables package) nil
- (package-%shadowing-symbols package) nil
- (package-internal-symbols package)
- (make-or-remake-package-hashtable 0)
- (package-external-symbols package)
- (make-or-remake-package-hashtable 0))
- t)))))
+ (with-packages ()
+ (let ((package (if (packagep package-designator)
+ package-designator
+ (find-package package-designator))))
+ (cond ((not package)
+ ;; This continuable error is required by ANSI.
+ (cerror
+ "Return ~S."
+ (make-condition
+ 'simple-package-error
+ :package package-designator
+ :format-control "There is no package named ~S."
+ :format-arguments (list package-designator))
+ nil))
+ ((not (package-name package)) ; already deleted
+ nil)
+ (t
+ (with-single-package-locked-error
+ (:package package "deleting package ~A" package)
+ (let ((use-list (package-used-by-list package)))
+ (when use-list
+ ;; This continuable error is specified by ANSI.
+ (cerror
+ "Remove dependency in other packages."
+ (make-condition
+ 'simple-package-error
+ :package package
+ :format-control
+ "~@<Package ~S is used by package~P:~2I~_~S~@:>"
+ :format-arguments (list (package-name package)
+ (length use-list)
+ (mapcar #'package-name use-list))))
+ (dolist (p use-list)
+ (unuse-package package p))))
+ (dolist (used (package-use-list package))
+ (unuse-package used package))
+ (do-symbols (sym package)
+ (unintern sym package))
+ (remhash (package-name package) *package-names*)
+ (dolist (nick (package-nicknames package))
+ (remhash nick *package-names*))
+ (setf (package-%name package) nil
+ ;; Setting PACKAGE-%NAME to NIL is required in order to
+ ;; make PACKAGE-NAME return NIL for a deleted package as
+ ;; ANSI requires. Setting the other slots to NIL
+ ;; and blowing away the PACKAGE-HASHTABLES is just done
+ ;; for tidiness and to help the GC.
+ (package-%nicknames package) nil
+ (package-%use-list package) nil
+ (package-tables package) nil
+ (package-%shadowing-symbols package) nil
+ (package-internal-symbols package)
+ (make-or-remake-package-hashtable 0)
+ (package-external-symbols package)
+ (make-or-remake-package-hashtable 0))
+ t))))))
(defun list-all-packages ()
#!+sb-doc
(cond (where
(values symbol where))
(t
- (let ((symbol-name (subseq name 0 length)))
- (with-single-package-locked-error
- (:package package "interning ~A" symbol-name)
- (let ((symbol (make-symbol symbol-name)))
- (%set-symbol-package symbol package)
- (cond ((eq package *keyword-package*)
- (add-symbol (package-external-symbols package) symbol)
- (%set-symbol-value symbol symbol))
- (t
- (add-symbol (package-internal-symbols package) symbol)))
- (values symbol nil))))))))
+ ;; Let's try again with a lock: the common case has the
+ ;; symbol already interned, handled by the first leg of the
+ ;; COND, but in case another thread is interning in
+ ;; parallel we need to check after grabbing the lock.
+ (with-packages ()
+ (setf (values symbol where) (find-symbol* name length package))
+ (if where
+ (values symbol where)
+ (let ((symbol-name (subseq name 0 length)))
+ (with-single-package-locked-error
+ (:package package "interning ~A" symbol-name)
+ (let ((symbol (make-symbol symbol-name)))
+ (%set-symbol-package symbol package)
+ (cond
+ ((eq package *keyword-package*)
+ (add-symbol (package-external-symbols package) symbol)
+ (%set-symbol-value symbol symbol))
+ (t
+ (add-symbol (package-internal-symbols package) symbol)))
+ (values symbol nil))))))))))
;;; Check internal and external symbols, then scan down the list
-;;; of hashtables for inherited symbols. When an inherited symbol
-;;; is found pull that table to the beginning of the list.
+;;; of hashtables for inherited symbols.
(defun find-symbol* (string length package)
(declare (simple-string string)
(type index length))
((null table) (values nil nil))
(with-symbol (found symbol (car table) string length hash ehash)
(when found
- (unless (eq prev head)
- (shiftf (cdr prev) (cdr table) (cdr head) table))
+ ;; At this point we used to move the table to the
+ ;; beginning of the list, probably on the theory that we'd
+ ;; soon be looking up further items there. Unfortunately
+ ;; that was very much non-thread safe. Since the failure
+ ;; mode was nasty (corruption of the package in a way
+ ;; which would make symbol lookups loop infinitely) and it
+ ;; would be triggered just by doing reads to a resource
+ ;; that users can't do their own locking on, that code has
+ ;; been removed. If we ever add locking to packages,
+ ;; resurrecting that code might make sense, even though it
+ ;; didn't seem to have much of an performance effect in
+ ;; normal use.
+ ;;
+ ;; -- JES, 2006-09-13
(return-from find-symbol* (values symbol :inherited))))))))
;;; Similar to FIND-SYMBOL, but only looks for an external symbol.
string length hash ehash)
(values symbol found))))
\f
+(defun print-symbol-with-prefix (stream symbol colon at)
+ #!+sb-doc
+ "For use with ~/: Write SYMBOL to STREAM as if it is not accessible from
+ the current package."
+ (declare (ignore colon at))
+ ;; Only keywords should be accessible from the keyword package, and
+ ;; keywords are always printed with colons, so this guarantees that the
+ ;; symbol will not be printed without a prefix.
+ (let ((*package* *keyword-package*))
+ (write symbol :stream stream :escape t)))
+
(define-condition name-conflict (reference-condition package-error)
((function :initarg :function :reader name-conflict-function)
(datum :initarg :datum :reader name-conflict-datum)
(:report
(lambda (c s)
(format s "~@<~S ~S causes name-conflicts in ~S between the ~
- following symbols:~2I~@:_~{~S~^, ~}~:@>"
+ following symbols:~2I~@:_~
+ ~{~/sb-impl::print-symbol-with-prefix/~^, ~}~:@>"
(name-conflict-function c)
(name-conflict-datum c)
(package-error-package c)
:interactive
(lambda ()
(let* ((len (length symbols))
- (nlen (length (write-to-string len :base 10))))
+ (nlen (length (write-to-string len :base 10)))
+ (*print-pretty* t))
(format *query-io* "~&~@<Select a symbol to be made accessible in ~
- package ~A:~2I~@:_~{~{~V,' D. ~S~}~@:_~}~@:>"
+ package ~A:~2I~@:_~{~{~V,' D. ~
+ ~/sb-impl::print-symbol-with-prefix/~}~@:_~}~
+ ~@:>"
(package-name package)
(loop for s in symbols
for i upfrom 1
;;; result, otherwise just nuke the symbol.
(defun unintern (symbol &optional (package (sane-package)))
#!+sb-doc
- "Makes SYMBOL no longer present in PACKAGE. If SYMBOL was present
- then T is returned, otherwise NIL. If PACKAGE is SYMBOL's home
- package, then it is made uninterned."
- (let* ((package (find-undeleted-package-or-lose package))
- (name (symbol-name symbol))
- (shadowing-symbols (package-%shadowing-symbols package)))
- (declare (list shadowing-symbols))
-
- (with-single-package-locked-error ()
- (when (find-symbol name package)
- (assert-package-unlocked package "uninterning ~A" name))
-
- ;; If a name conflict is revealed, give us a chance to
- ;; shadowing-import one of the accessible symbols.
- (when (member symbol shadowing-symbols)
- (let ((cset ()))
- (dolist (p (package-%use-list package))
- (multiple-value-bind (s w) (find-external-symbol name p)
- (when w (pushnew s cset))))
- (when (cdr cset)
- (apply #'name-conflict package 'unintern symbol cset)
- (return-from unintern t)))
- (setf (package-%shadowing-symbols package)
- (remove symbol shadowing-symbols)))
-
- (multiple-value-bind (s w) (find-symbol name package)
- (declare (ignore s))
- (cond ((or (eq w :internal) (eq w :external))
- (nuke-symbol (if (eq w :internal)
- (package-internal-symbols package)
- (package-external-symbols package))
- name)
- (if (eq (symbol-package symbol) package)
- (%set-symbol-package symbol nil))
- t)
- (t nil))))))
+ "Makes SYMBOL no longer present in PACKAGE. If SYMBOL was present then T is
+returned, otherwise NIL. If PACKAGE is SYMBOL's home package, then it is made
+uninterned."
+ (with-packages ()
+ (let* ((package (find-undeleted-package-or-lose package))
+ (name (symbol-name symbol))
+ (shadowing-symbols (package-%shadowing-symbols package)))
+ (declare (list shadowing-symbols))
+
+ (with-single-package-locked-error ()
+ (when (find-symbol name package)
+ (assert-package-unlocked package "uninterning ~A" name))
+
+ ;; If a name conflict is revealed, give us a chance to
+ ;; shadowing-import one of the accessible symbols.
+ (when (member symbol shadowing-symbols)
+ (let ((cset ()))
+ (dolist (p (package-%use-list package))
+ (multiple-value-bind (s w) (find-external-symbol name p)
+ (when w (pushnew s cset))))
+ (when (cdr cset)
+ (apply #'name-conflict package 'unintern symbol cset)
+ (return-from unintern t)))
+ (setf (package-%shadowing-symbols package)
+ (remove symbol shadowing-symbols)))
+
+ (multiple-value-bind (s w) (find-symbol name package)
+ (declare (ignore s))
+ (cond ((or (eq w :internal) (eq w :external))
+ (nuke-symbol (if (eq w :internal)
+ (package-internal-symbols package)
+ (package-external-symbols package))
+ name)
+ (if (eq (symbol-package symbol) package)
+ (%set-symbol-package symbol nil))
+ t)
+ (t nil)))))))
\f
;;; Take a symbol-or-list-of-symbols and return a list, checking types.
(defun symbol-listify (thing)
(defun export (symbols &optional (package (sane-package)))
#!+sb-doc
"Exports SYMBOLS from PACKAGE, checking that no name conflicts result."
- (let ((package (find-undeleted-package-or-lose package))
- (syms ()))
- ;; Punt any symbols that are already external.
- (dolist (sym (symbol-listify symbols))
- (multiple-value-bind (s w)
- (find-external-symbol (symbol-name sym) package)
- (declare (ignore s))
- (unless (or w (member sym syms))
- (push sym syms))))
- (with-single-package-locked-error ()
- (when syms
- (assert-package-unlocked package "exporting symbol~P ~{~A~^, ~}"
- (length syms) syms))
- ;; Find symbols and packages with conflicts.
- (let ((used-by (package-%used-by-list package))
- (cset ()))
- (dolist (sym syms)
- (let ((name (symbol-name sym)))
- (dolist (p used-by)
- (multiple-value-bind (s w) (find-symbol name p)
- (when (and w
- (not (eq s sym))
- (not (member s (package-%shadowing-symbols p))))
- ;; Beware: the name conflict is in package P, not in
- ;; PACKAGE.
- (name-conflict p 'export sym sym s)
- (pushnew sym cset))))))
- (when cset
- (setq syms (set-difference syms cset))))
- ;; Check that all symbols are accessible. If not, ask to import them.
- (let ((missing ())
- (imports ()))
- (dolist (sym syms)
- (multiple-value-bind (s w) (find-symbol (symbol-name sym) package)
- (cond ((not (and w (eq s sym)))
- (push sym missing))
- ((eq w :inherited)
- (push sym imports)))))
- (when missing
- (cerror
- "~S these symbols into the ~A package."
- (make-condition
- 'simple-package-error
- :package package
- :format-control
- "~@<These symbols are not accessible in the ~A package:~2I~_~S~@:>"
- :format-arguments (list (package-%name package) missing))
- 'import (package-%name package))
- (import missing package))
- (import imports package))
-
- ;; And now, three pages later, we export the suckers.
- (let ((internal (package-internal-symbols package))
- (external (package-external-symbols package)))
- (dolist (sym syms)
- (nuke-symbol internal (symbol-name sym))
- (add-symbol external sym))))
- t))
+ (with-packages ()
+ (let ((package (find-undeleted-package-or-lose package))
+ (syms ()))
+ ;; Punt any symbols that are already external.
+ (dolist (sym (symbol-listify symbols))
+ (multiple-value-bind (s w)
+ (find-external-symbol (symbol-name sym) package)
+ (declare (ignore s))
+ (unless (or w (member sym syms))
+ (push sym syms))))
+ (with-single-package-locked-error ()
+ (when syms
+ (assert-package-unlocked package "exporting symbol~P ~{~A~^, ~}"
+ (length syms) syms))
+ ;; Find symbols and packages with conflicts.
+ (let ((used-by (package-%used-by-list package))
+ (cset ()))
+ (dolist (sym syms)
+ (let ((name (symbol-name sym)))
+ (dolist (p used-by)
+ (multiple-value-bind (s w) (find-symbol name p)
+ (when (and w
+ (not (eq s sym))
+ (not (member s (package-%shadowing-symbols p))))
+ ;; Beware: the name conflict is in package P, not in
+ ;; PACKAGE.
+ (name-conflict p 'export sym sym s)
+ (pushnew sym cset))))))
+ (when cset
+ (setq syms (set-difference syms cset))))
+ ;; Check that all symbols are accessible. If not, ask to import them.
+ (let ((missing ())
+ (imports ()))
+ (dolist (sym syms)
+ (multiple-value-bind (s w) (find-symbol (symbol-name sym) package)
+ (cond ((not (and w (eq s sym)))
+ (push sym missing))
+ ((eq w :inherited)
+ (push sym imports)))))
+ (when missing
+ (cerror
+ "~S these symbols into the ~A package."
+ (make-condition
+ 'simple-package-error
+ :package package
+ :format-control
+ "~@<These symbols are not accessible in the ~A package:~2I~_~S~@:>"
+ :format-arguments (list (package-%name package) missing))
+ 'import (package-%name package))
+ (import missing package))
+ (import imports package))
+
+ ;; And now, three pages later, we export the suckers.
+ (let ((internal (package-internal-symbols package))
+ (external (package-external-symbols package)))
+ (dolist (sym syms)
+ (nuke-symbol internal (symbol-name sym))
+ (add-symbol external sym))))
+ t)))
\f
;;; Check that all symbols are accessible, then move from external to internal.
(defun unexport (symbols &optional (package (sane-package)))
#!+sb-doc
"Makes SYMBOLS no longer exported from PACKAGE."
- (let ((package (find-undeleted-package-or-lose package))
- (syms ()))
- (dolist (sym (symbol-listify symbols))
- (multiple-value-bind (s w) (find-symbol (symbol-name sym) package)
- (cond ((or (not w) (not (eq s sym)))
- (error 'simple-package-error
- :package package
- :format-control "~S is not accessible in the ~A package."
- :format-arguments (list sym (package-%name package))))
- ((eq w :external) (pushnew sym syms)))))
- (with-single-package-locked-error ()
- (when syms
- (assert-package-unlocked package "unexporting symbol~P ~{~A~^, ~}"
- (length syms) syms))
- (let ((internal (package-internal-symbols package))
- (external (package-external-symbols package)))
- (dolist (sym syms)
- (add-symbol internal sym)
- (nuke-symbol external (symbol-name sym)))))
- t))
+ (with-packages ()
+ (let ((package (find-undeleted-package-or-lose package))
+ (syms ()))
+ (dolist (sym (symbol-listify symbols))
+ (multiple-value-bind (s w) (find-symbol (symbol-name sym) package)
+ (cond ((or (not w) (not (eq s sym)))
+ (error 'simple-package-error
+ :package package
+ :format-control "~S is not accessible in the ~A package."
+ :format-arguments (list sym (package-%name package))))
+ ((eq w :external) (pushnew sym syms)))))
+ (with-single-package-locked-error ()
+ (when syms
+ (assert-package-unlocked package "unexporting symbol~P ~{~A~^, ~}"
+ (length syms) syms))
+ (let ((internal (package-internal-symbols package))
+ (external (package-external-symbols package)))
+ (dolist (sym syms)
+ (add-symbol internal sym)
+ (nuke-symbol external (symbol-name sym)))))
+ t)))
\f
;;; Check for name conflict caused by the import and let the user
;;; shadowing-import if there is.
(defun import (symbols &optional (package (sane-package)))
#!+sb-doc
- "Make SYMBOLS accessible as internal symbols in PACKAGE. If a symbol
- is already accessible then it has no effect. If a name conflict
- would result from the importation, then a correctable error is signalled."
- (let* ((package (find-undeleted-package-or-lose package))
- (symbols (symbol-listify symbols))
- (homeless (remove-if #'symbol-package symbols))
- (syms ()))
- (with-single-package-locked-error ()
- (dolist (sym symbols)
- (multiple-value-bind (s w) (find-symbol (symbol-name sym) package)
- (cond ((not w)
- (let ((found (member sym syms :test #'string=)))
- (if found
- (when (not (eq (car found) sym))
- (name-conflict package 'import sym sym (car found)))
- (push sym syms))))
- ((not (eq s sym))
- (name-conflict package 'import sym sym s))
- ((eq w :inherited) (push sym syms)))))
- (when (or homeless syms)
- (let ((union (delete-duplicates (append homeless syms))))
- (assert-package-unlocked package "importing symbol~P ~{~A~^, ~}"
- (length union) union)))
- ;; Add the new symbols to the internal hashtable.
- (let ((internal (package-internal-symbols package)))
- (dolist (sym syms)
- (add-symbol internal sym)))
- ;; If any of the symbols are uninterned, make them be owned by PACKAGE.
- (dolist (sym homeless)
- (%set-symbol-package sym package))
- t)))
+ "Make SYMBOLS accessible as internal symbols in PACKAGE. If a symbol is
+already accessible then it has no effect. If a name conflict would result from
+the importation, then a correctable error is signalled."
+ (with-packages ()
+ (let* ((package (find-undeleted-package-or-lose package))
+ (symbols (symbol-listify symbols))
+ (homeless (remove-if #'symbol-package symbols))
+ (syms ()))
+ (with-single-package-locked-error ()
+ (dolist (sym symbols)
+ (multiple-value-bind (s w) (find-symbol (symbol-name sym) package)
+ (cond ((not w)
+ (let ((found (member sym syms :test #'string=)))
+ (if found
+ (when (not (eq (car found) sym))
+ (name-conflict package 'import sym sym (car found)))
+ (push sym syms))))
+ ((not (eq s sym))
+ (name-conflict package 'import sym sym s))
+ ((eq w :inherited) (push sym syms)))))
+ (when (or homeless syms)
+ (let ((union (delete-duplicates (append homeless syms))))
+ (assert-package-unlocked package "importing symbol~P ~{~A~^, ~}"
+ (length union) union)))
+ ;; Add the new symbols to the internal hashtable.
+ (let ((internal (package-internal-symbols package)))
+ (dolist (sym syms)
+ (add-symbol internal sym)))
+ ;; If any of the symbols are uninterned, make them be owned by PACKAGE.
+ (dolist (sym homeless)
+ (%set-symbol-package sym package))
+ t))))
\f
;;; If a conflicting symbol is present, unintern it, otherwise just
;;; stick the symbol in.
#!+sb-doc
"Import SYMBOLS into package, disregarding any name conflict. If
a symbol of the same name is present, then it is uninterned."
- (let* ((package (find-undeleted-package-or-lose package))
- (internal (package-internal-symbols package))
- (symbols (symbol-listify symbols))
- (lock-asserted-p nil))
- (with-single-package-locked-error ()
- (dolist (sym symbols)
- (multiple-value-bind (s w) (find-symbol (symbol-name sym) package)
- (unless (or lock-asserted-p
- (and (eq s sym)
- (member s (package-shadowing-symbols package))))
- (assert-package-unlocked package "shadowing-importing symbol~P ~
+ (with-packages ()
+ (let* ((package (find-undeleted-package-or-lose package))
+ (internal (package-internal-symbols package))
+ (symbols (symbol-listify symbols))
+ (lock-asserted-p nil))
+ (with-single-package-locked-error ()
+ (dolist (sym symbols)
+ (multiple-value-bind (s w) (find-symbol (symbol-name sym) package)
+ (unless (or lock-asserted-p
+ (and (eq s sym)
+ (member s (package-shadowing-symbols package))))
+ (assert-package-unlocked package "shadowing-importing symbol~P ~
~{~A~^, ~}" (length symbols) symbols)
- (setf lock-asserted-p t))
- (unless (and w (not (eq w :inherited)) (eq s sym))
- (when (or (eq w :internal) (eq w :external))
- ;; If it was shadowed, we don't want UNINTERN to flame out...
- (setf (package-%shadowing-symbols package)
- (remove s (the list (package-%shadowing-symbols package))))
- (unintern s package))
- (add-symbol internal sym))
- (pushnew sym (package-%shadowing-symbols package))))))
+ (setf lock-asserted-p t))
+ (unless (and w (not (eq w :inherited)) (eq s sym))
+ (when (or (eq w :internal) (eq w :external))
+ ;; If it was shadowed, we don't want UNINTERN to flame out...
+ (setf (package-%shadowing-symbols package)
+ (remove s (the list (package-%shadowing-symbols package))))
+ (unintern s package))
+ (add-symbol internal sym))
+ (pushnew sym (package-%shadowing-symbols package)))))))
t)
(defun shadow (symbols &optional (package (sane-package)))
#!+sb-doc
- "Make an internal symbol in PACKAGE with the same name as each of
- the specified SYMBOLS. If a symbol with the given name is already
- present in PACKAGE, then the existing symbol is placed in the
- shadowing symbols list if it is not already present."
- (let* ((package (find-undeleted-package-or-lose package))
- (internal (package-internal-symbols package))
- (symbols (string-listify symbols))
- (lock-asserted-p nil))
- (flet ((present-p (w)
- (and w (not (eq w :inherited)))))
- (with-single-package-locked-error ()
- (dolist (name symbols)
- (multiple-value-bind (s w) (find-symbol name package)
- (unless (or lock-asserted-p
- (and (present-p w)
- (member s (package-shadowing-symbols package))))
- (assert-package-unlocked package "shadowing symbol~P ~{~A~^, ~}"
- (length symbols) symbols)
- (setf lock-asserted-p t))
- (unless (present-p w)
- (setq s (make-symbol name))
- (%set-symbol-package s package)
- (add-symbol internal s))
- (pushnew s (package-%shadowing-symbols package)))))))
+ "Make an internal symbol in PACKAGE with the same name as each of the
+specified SYMBOLS. If a symbol with the given name is already present in
+PACKAGE, then the existing symbol is placed in the shadowing symbols list if
+it is not already present."
+ (with-packages ()
+ (let* ((package (find-undeleted-package-or-lose package))
+ (internal (package-internal-symbols package))
+ (symbols (string-listify symbols))
+ (lock-asserted-p nil))
+ (flet ((present-p (w)
+ (and w (not (eq w :inherited)))))
+ (with-single-package-locked-error ()
+ (dolist (name symbols)
+ (multiple-value-bind (s w) (find-symbol name package)
+ (unless (or lock-asserted-p
+ (and (present-p w)
+ (member s (package-shadowing-symbols package))))
+ (assert-package-unlocked package "shadowing symbol~P ~{~A~^, ~}"
+ (length symbols) symbols)
+ (setf lock-asserted-p t))
+ (unless (present-p w)
+ (setq s (make-symbol name))
+ (%set-symbol-package s package)
+ (add-symbol internal s))
+ (pushnew s (package-%shadowing-symbols package))))))))
t)
\f
;;; Do stuff to use a package, with all kinds of fun name-conflict checking.
(defun use-package (packages-to-use &optional (package (sane-package)))
#!+sb-doc
- "Add all the PACKAGES-TO-USE to the use list for PACKAGE so that
- the external symbols of the used packages are accessible as internal
- symbols in PACKAGE."
- (let ((packages (package-listify packages-to-use))
- (package (find-undeleted-package-or-lose package)))
-
- ;; Loop over each package, USE'ing one at a time...
- (with-single-package-locked-error ()
- (dolist (pkg packages)
- (unless (member pkg (package-%use-list package))
- (assert-package-unlocked package "using package~P ~{~A~^, ~}"
- (length packages) packages)
- (let ((shadowing-symbols (package-%shadowing-symbols package))
- (use-list (package-%use-list package)))
-
- ;; If the number of symbols already accessible is less
- ;; than the number to be inherited then it is faster to
- ;; run the test the other way. This is particularly
- ;; valuable in the case of a new package USEing
- ;; COMMON-LISP.
- (cond
- ((< (+ (package-internal-symbol-count package)
- (package-external-symbol-count package)
- (let ((res 0))
- (dolist (p use-list res)
- (incf res (package-external-symbol-count p)))))
- (package-external-symbol-count pkg))
- (do-symbols (sym package)
- (multiple-value-bind (s w)
- (find-external-symbol (symbol-name sym) pkg)
- (when (and w
- (not (eq s sym))
- (not (member sym shadowing-symbols)))
- (name-conflict package 'use-package pkg sym s))))
- (dolist (p use-list)
- (do-external-symbols (sym p)
+ "Add all the PACKAGES-TO-USE to the use list for PACKAGE so that the
+external symbols of the used packages are accessible as internal symbols in
+PACKAGE."
+ (with-packages ()
+ (let ((packages (package-listify packages-to-use))
+ (package (find-undeleted-package-or-lose package)))
+
+ ;; Loop over each package, USE'ing one at a time...
+ (with-single-package-locked-error ()
+ (dolist (pkg packages)
+ (unless (member pkg (package-%use-list package))
+ (assert-package-unlocked package "using package~P ~{~A~^, ~}"
+ (length packages) packages)
+ (let ((shadowing-symbols (package-%shadowing-symbols package))
+ (use-list (package-%use-list package)))
+
+ ;; If the number of symbols already accessible is less
+ ;; than the number to be inherited then it is faster to
+ ;; run the test the other way. This is particularly
+ ;; valuable in the case of a new package USEing
+ ;; COMMON-LISP.
+ (cond
+ ((< (+ (package-internal-symbol-count package)
+ (package-external-symbol-count package)
+ (let ((res 0))
+ (dolist (p use-list res)
+ (incf res (package-external-symbol-count p)))))
+ (package-external-symbol-count pkg))
+ (do-symbols (sym package)
(multiple-value-bind (s w)
(find-external-symbol (symbol-name sym) pkg)
(when (and w
(not (eq s sym))
- (not (member
- (find-symbol (symbol-name sym) package)
- shadowing-symbols)))
- (name-conflict package 'use-package pkg sym s))))))
- (t
- (do-external-symbols (sym pkg)
- (multiple-value-bind (s w)
- (find-symbol (symbol-name sym) package)
- (when (and w
- (not (eq s sym))
- (not (member s shadowing-symbols)))
- (name-conflict package 'use-package pkg sym s)))))))
-
- (push pkg (package-%use-list package))
- (push (package-external-symbols pkg) (cdr (package-tables package)))
- (push package (package-%used-by-list pkg))))))
+ (not (member sym shadowing-symbols)))
+ (name-conflict package 'use-package pkg sym s))))
+ (dolist (p use-list)
+ (do-external-symbols (sym p)
+ (multiple-value-bind (s w)
+ (find-external-symbol (symbol-name sym) pkg)
+ (when (and w
+ (not (eq s sym))
+ (not (member
+ (find-symbol (symbol-name sym) package)
+ shadowing-symbols)))
+ (name-conflict package 'use-package pkg sym s))))))
+ (t
+ (do-external-symbols (sym pkg)
+ (multiple-value-bind (s w)
+ (find-symbol (symbol-name sym) package)
+ (when (and w
+ (not (eq s sym))
+ (not (member s shadowing-symbols)))
+ (name-conflict package 'use-package pkg sym s)))))))
+
+ (push pkg (package-%use-list package))
+ (push (package-external-symbols pkg) (cdr (package-tables package)))
+ (push package (package-%used-by-list pkg)))))))
t)
(defun unuse-package (packages-to-unuse &optional (package (sane-package)))
#!+sb-doc
"Remove PACKAGES-TO-UNUSE from the USE list for PACKAGE."
- (let ((package (find-undeleted-package-or-lose package))
- (packages (package-listify packages-to-unuse)))
- (with-single-package-locked-error ()
- (dolist (p packages)
- (when (member p (package-use-list package))
- (assert-package-unlocked package "unusing package~P ~{~A~^, ~}"
- (length packages) packages))
- (setf (package-%use-list package)
- (remove p (the list (package-%use-list package))))
- (setf (package-tables package)
- (delete (package-external-symbols p)
- (the list (package-tables package))))
- (setf (package-%used-by-list p)
- (remove package (the list (package-%used-by-list p))))))
- t))
+ (with-packages ()
+ (let ((package (find-undeleted-package-or-lose package))
+ (packages (package-listify packages-to-unuse)))
+ (with-single-package-locked-error ()
+ (dolist (p packages)
+ (when (member p (package-use-list package))
+ (assert-package-unlocked package "unusing package~P ~{~A~^, ~}"
+ (length packages) packages))
+ (setf (package-%use-list package)
+ (remove p (the list (package-%use-list package))))
+ (setf (package-tables package)
+ (delete (package-external-symbols p)
+ (the list (package-tables package))))
+ (setf (package-%used-by-list p)
+ (remove package (the list (package-%used-by-list p))))))
+ t)))
(defun find-all-symbols (string-or-symbol)
#!+sb-doc
of describing them."
(if package-designator
(let ((package (find-undeleted-package-or-lose package-designator))
- (string (stringify-name string-designator "APROPOS search"))
+ (string (stringify-string-designator string-designator))
(result nil))
(do-symbols (symbol package)
(when (and (eq (symbol-package symbol) package)
projects / sbcl.git / blobdiff