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;;; -*- Mode: common-lisp; Package: xlib; Base: 10; Lowercase: Yes -*-
;;;
;;; CLX -- excldep.cl
;;;
;;; Copyright (c) 1987, 1988, 1989 Franz Inc, Berkeley, Ca.
;;;
;;; Permission is granted to any individual or institution to use, copy,
;;; modify, and distribute this software, provided that this complete
;;; copyright and permission notice is maintained, intact, in all copies and
;;; supporting documentation.
;;;
;;; Franz Incorporated provides this software "as is" without
;;; express or implied warranty.
;;;
(in-package :xlib)
(eval-when (compile load eval)
(require :foreign)
(require :process) ; Needed even if scheduler is not
; running. (Must be able to make
; a process-lock.)
)
(eval-when (load)
(provide :clx))
#-(or little-endian big-endian)
(eval-when (eval compile load)
(let ((x '#(1)))
(if (not (eq 0 (sys::memref x
#.(sys::mdparam 'comp::md-lvector-data0-norm)
0 :unsigned-byte)))
(pushnew :little-endian *features*)
(pushnew :big-endian *features*))))
(defmacro correct-case (string)
;; This macro converts the given string to the
;; current preferred case, or leaves it alone in a case-sensitive mode.
(let ((str (gensym)))
`(let ((,str ,string))
(case excl::*current-case-mode*
(:case-insensitive-lower
(string-downcase ,str))
(:case-insensitive-upper
(string-upcase ,str))
((:case-sensitive-lower :case-sensitive-upper)
,str)))))
(defconstant type-pred-alist
'(#-(version>= 4 1 devel 16)
(card8 . card8p)
#-(version>= 4 1 devel 16)
(card16 . card16p)
#-(version>= 4 1 devel 16)
(card29 . card29p)
#-(version>= 4 1 devel 16)
(card32 . card32p)
#-(version>= 4 1 devel 16)
(int8 . int8p)
#-(version>= 4 1 devel 16)
(int16 . int16p)
#-(version>= 4 1 devel 16)
(int32 . int32p)
#-(version>= 4 1 devel 16)
(mask16 . card16p)
#-(version>= 4 1 devel 16)
(mask32 . card32p)
#-(version>= 4 1 devel 16)
(pixel . card32p)
#-(version>= 4 1 devel 16)
(resource-id . card29p)
#-(version>= 4 1 devel 16)
(keysym . card32p)
(angle . anglep)
(color . color-p)
(bitmap-format . bitmap-format-p)
(pixmap-format . pixmap-format-p)
(display . display-p)
(drawable . drawable-p)
(window . window-p)
(pixmap . pixmap-p)
(visual-info . visual-info-p)
(colormap . colormap-p)
(cursor . cursor-p)
(gcontext . gcontext-p)
(screen . screen-p)
(font . font-p)
(image-x . image-x-p)
(image-xy . image-xy-p)
(image-z . image-z-p)
(wm-hints . wm-hints-p)
(wm-size-hints . wm-size-hints-p)
))
;; This (if (and ...) t nil) stuff has a purpose -- it lets the old
;; sun4 compiler opencode the `and'.
#-(version>= 4 1 devel 16)
(defun card8p (x)
(declare (optimize (speed 3) (safety 0))
(fixnum x))
(if (and (excl:fixnump x) (> #.(expt 2 8) x) (>= x 0))
t
nil))
#-(version>= 4 1 devel 16)
(defun card16p (x)
(declare (optimize (speed 3) (safety 0))
(fixnum x))
(if (and (excl:fixnump x) (> #.(expt 2 16) x) (>= x 0))
t
nil))
#-(version>= 4 1 devel 16)
(defun card29p (x)
(declare (optimize (speed 3) (safety 0)))
(if (or (and (excl:fixnump x) (>= (the fixnum x) 0))
(and (excl:bignump x) (> #.(expt 2 29) (the bignum x))
(>= (the bignum x) 0)))
t
nil))
#-(version>= 4 1 devel 16)
(defun card32p (x)
(declare (optimize (speed 3) (safety 0)))
(if (or (and (excl:fixnump x) (>= (the fixnum x) 0))
(and (excl:bignump x) (> #.(expt 2 32) (the bignum x))
(>= (the bignum x) 0)))
t
nil))
#-(version>= 4 1 devel 16)
(defun int8p (x)
(declare (optimize (speed 3) (safety 0))
(fixnum x))
(if (and (excl:fixnump x) (> #.(expt 2 7) x) (>= x #.(expt -2 7)))
t
nil))
#-(version>= 4 1 devel 16)
(defun int16p (x)
(declare (optimize (speed 3) (safety 0))
(fixnum x))
(if (and (excl:fixnump x) (> #.(expt 2 15) x) (>= x #.(expt -2 15)))
t
nil))
#-(version>= 4 1 devel 16)
(defun int32p (x)
(declare (optimize (speed 3) (safety 0)))
(if (or (excl:fixnump x)
(and (excl:bignump x) (> #.(expt 2 31) (the bignum x))
(>= (the bignum x) #.(expt -2 31))))
t
nil))
;; This one can be handled better by knowing a little about what we're
;; testing for. Plus this version can handle (single-float pi), which
;; is otherwise larger than pi!
(defun anglep (x)
(declare (optimize (speed 3) (safety 0)))
(if (or (and (excl::fixnump x) (>= (the fixnum x) #.(truncate (* -2 pi)))
(<= (the fixnum x) #.(truncate (* 2 pi))))
(and (excl::single-float-p x)
(>= (the single-float x) #.(float (* -2 pi) 0.0s0))
(<= (the single-float x) #.(float (* 2 pi) 0.0s0)))
(and (excl::double-float-p x)
(>= (the double-float x) #.(float (* -2 pi) 0.0d0))
(<= (the double-float x) #.(float (* 2 pi) 0.0d0))))
t
nil))
(eval-when (load eval)
#+(version>= 4 1 devel 16)
(mapcar #'(lambda (elt) (excl:add-typep-transformer (car elt) (cdr elt)))
type-pred-alist)
#-(version>= 4 1 devel 16)
(nconc excl::type-pred-alist type-pred-alist))
;; Return t if there is a character available for reading or on error,
;; otherwise return nil.
#-(version>= 6 0)
(progn
#-(or (version>= 4 2) mswindows)
(defun fd-char-avail-p (fd)
(multiple-value-bind (available-p errcode)
(comp::.primcall-sargs 'sys::filesys excl::fs-char-avail fd)
(excl:if* errcode
then t
else available-p)))
#+(and (version>= 4 2) (not mswindows))
(defun fd-char-avail-p (fd)
(excl::filesys-character-available-p fd))
#+mswindows
(defun fd-char-avail-p (socket-stream)
(listen socket-stream))
)
#+(version>= 6 0)
(defun fd-char-avail-p (socket-stream)
(excl::read-no-hang-p socket-stream))
(defmacro with-interrupt-checking-on (&body body)
`(locally (declare (optimize (safety 1)))
,@body))
;; Read from the given fd into 'vector', which has element type card8.
;; Start storing at index 'start-index' and read exactly 'length' bytes.
;; Return t if an error or eof occurred, nil otherwise.
(defun fd-read-bytes (fd vector start-index length)
;; Read from the given stream fd into 'vector', which has element type card8.
;; Start storing at index 'start-index' and read exactly 'length' bytes.
;; Return t if an error or eof occurred, nil otherwise.
(declare (fixnum next-index start-index length))
(with-interrupt-checking-on
(let ((end-index (+ start-index length)))
(loop
(let ((next-index (excl:read-vector vector fd
:start start-index
:end end-index)))
(excl:if* (eq next-index start-index)
then ; end of file before was all filled up
(return t)
elseif (eq next-index end-index)
then ; we're all done
(return nil)
else (setq start-index next-index)))))))
;; special patch for CLX (various process fixes)
;; patch1000.2
(eval-when (compile load eval)
(unless (find-package :patch)
(make-package :patch :use '(:lisp :excl))))
(in-package :patch)
(defvar *patches* nil)
#+allegro
(eval-when (compile eval load)
(when (and (= excl::cl-major-version-number 3)
(or (= excl::cl-minor-version-number 0)
(and (= excl::cl-minor-version-number 1)
excl::cl-generation-number
(< excl::cl-generation-number 9))))
(push :clx-r4-process-patches *features*)))
#+clx-r4-process-patches
(push (cons 1000.2 "special patch for CLX (various process fixes)")
*patches*)
(in-package :mp)
#+clx-r4-process-patches
(export 'wait-for-input-available)
#+clx-r4-process-patches
(defun with-timeout-event (seconds fnc args)
(unless *scheduler-stack-group* (start-scheduler)) ;[spr670]
(let ((clock-event (make-clock-event)))
(when (<= seconds 0) (setq seconds 0))
(multiple-value-bind (secs msecs) (truncate seconds)
;; secs is now a nonegative integer, and msecs is either fixnum zero
;; or else something interesting.
(unless (eq 0 msecs)
(setq msecs (truncate (* 1000.0 msecs))))
;; Now msecs is also a nonnegative fixnum.
(multiple-value-bind (now mnow) (excl::cl-internal-real-time)
(incf secs now)
(incf msecs mnow)
(when (>= msecs 1000)
(decf msecs 1000)
(incf secs))
(unless (excl:fixnump secs) (setq secs most-positive-fixnum))
(setf (clock-event-secs clock-event) secs
(clock-event-msecs clock-event) msecs
(clock-event-function clock-event) fnc
(clock-event-args clock-event) args)))
clock-event))
#+clx-r4-process-patches
(defmacro with-timeout ((seconds &body timeout-body) &body body)
`(let* ((clock-event (with-timeout-event ,seconds
#'process-interrupt
(cons *current-process*
'(with-timeout-internal))))
(excl::*without-interrupts* t)
ret)
(unwind-protect
;; Warning: Branch tensioner better not reorder this code!
(setq ret (catch 'with-timeout-internal
(add-to-clock-queue clock-event)
(let ((excl::*without-interrupts* nil))
(multiple-value-list (progn ,@body)))))
(excl:if* (eq ret 'with-timeout-internal)
then (let ((excl::*without-interrupts* nil))
(setq ret (multiple-value-list (progn ,@timeout-body))))
else (remove-from-clock-queue clock-event)))
(values-list ret)))
#+clx-r4-process-patches
(defun process-lock (lock &optional (lock-value *current-process*)
(whostate "Lock") timeout)
(declare (optimize (speed 3)))
(unless (process-lock-p lock)
(error "First argument to PROCESS-LOCK must be a process-lock: ~s" lock))
(without-interrupts
(excl:if* (null (process-lock-locker lock))
then (setf (process-lock-locker lock) lock-value)
else (excl:if* timeout
then (excl:if* (or (eq 0 timeout) ;for speed
(zerop timeout))
then nil
else (with-timeout (timeout)
(process-lock-1 lock lock-value whostate)))
else (process-lock-1 lock lock-value whostate)))))
#+clx-r4-process-patches
(defun process-lock-1 (lock lock-value whostate)
(declare (type process-lock lock)
(optimize (speed 3)))
(let ((process *current-process*))
(declare (type process process))
(unless process
(error
"PROCESS-LOCK may not be called on the scheduler's stack group."))
(loop (unless (process-lock-locker lock)
(return (setf (process-lock-locker lock) lock-value)))
(push process (process-lock-waiting lock))
(let ((saved-whostate (process-whostate process)))
(unwind-protect
(progn (setf (process-whostate process) whostate)
(process-add-arrest-reason process lock))
(setf (process-whostate process) saved-whostate))))))
#+clx-r4-process-patches
(defun process-wait (whostate function &rest args)
(declare (optimize (speed 3)))
;; Run the wait function once here both for efficiency and as a
;; first line check for errors in the function.
(unless (apply function args)
(process-wait-1 whostate function args)))
#+clx-r4-process-patches
(defun process-wait-1 (whostate function args)
(declare (optimize (speed 3)))
(let ((process *current-process*))
(declare (type process process))
(unless process
(error
"Process-wait may not be called within the scheduler's stack group."))
(let ((saved-whostate (process-whostate process)))
(unwind-protect
(without-scheduling-internal
(without-interrupts
(setf (process-whostate process) whostate
(process-wait-function process) function
(process-wait-args process) args)
(chain-rem-q process)
(chain-ins-q process *waiting-processes*))
(process-resume-scheduler nil))
(setf (process-whostate process) saved-whostate
(process-wait-function process) nil
(process-wait-args process) nil)))))
#+clx-r4-process-patches
(defun process-wait-with-timeout (whostate seconds function &rest args)
;; Now returns T upon completion, NIL upon timeout. -- 6Jun89 smh
;; [spr1135] [rfe939] Timeout won't throw out of interrupt level code.
;; -- 28Feb90 smh
;; Run the wait function once here both for efficiency and as a
;; first line check for errors in the function.
(excl:if* (apply function args)
then t
else (let ((ret (list nil)))
(without-interrupts
(let ((clock-event
(with-timeout-event seconds #'identity '(nil))))
(add-to-clock-queue clock-event)
(process-wait-1 whostate
#'(lambda (clock-event function args ret)
(or (null (chain-next clock-event))
(and (apply function args)
(setf (car ret) 't))))
(list clock-event function args ret))))
(car ret))))
;;
;; Returns nil on timeout, otherwise t.
;;
#+clx-r4-process-patches
(defun wait-for-input-available
(stream-or-fd &key (wait-function #'listen)
(whostate "waiting for input")
timeout)
(let ((fd (excl:if* (excl:fixnump stream-or-fd) then stream-or-fd
elseif (streamp stream-or-fd)
then (excl::stream-input-fn stream-or-fd)
else (error "wait-for-input-available expects a stream or file descriptor: ~s" stream-or-fd))))
;; At this point fd could be nil, since stream-input-fn returns nil for
;; streams that are output only, or for certain special purpose streams.
(if fd
(unwind-protect
(progn
(mp::mpwatchfor fd)
(excl:if* timeout
then (mp::process-wait-with-timeout
whostate timeout wait-function stream-or-fd)
else (mp::process-wait whostate wait-function stream-or-fd)
t))
(mp::mpunwatchfor fd))
(excl:if* timeout
then (mp::process-wait-with-timeout
whostate timeout wait-function stream-or-fd)
else (mp::process-wait whostate wait-function stream-or-fd)
t))))