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dep-allegro.lisp
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dep-allegro.lisp
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;;; -*- Mode: Lisp; Package: Xlib; Log: clx.log -*-
;; This file contains some of the system dependent code for CLX
;;;
;;; TEXAS INSTRUMENTS INCORPORATED
;;; P.O. BOX 2909
;;; AUSTIN, TEXAS 78769
;;;
;;; Copyright (C) 1987 Texas Instruments Incorporated.
;;;
;;; 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.
;;;
;;; Texas Instruments Incorporated provides this software "as is" without
;;; express or implied warranty.
;;;
(in-package :xlib)
(proclaim '(declaration array-register))
;;; The size of the output buffer. Must be a multiple of 4.
(defparameter *output-buffer-size* 8192)
;;; Number of seconds to wait for a reply to a server request
(defparameter *reply-timeout* nil)
#-(or clx-overlapping-arrays (not clx-little-endian))
(progn
(defconstant +word-0+ 0)
(defconstant +word-1+ 1)
(defconstant +long-0+ 0)
(defconstant +long-1+ 1)
(defconstant +long-2+ 2)
(defconstant +long-3+ 3))
#-(or clx-overlapping-arrays clx-little-endian)
(progn
(defconstant +word-0+ 1)
(defconstant +word-1+ 0)
(defconstant +long-0+ 3)
(defconstant +long-1+ 2)
(defconstant +long-2+ 1)
(defconstant +long-3+ 0))
;;; Set some compiler-options for often used code
(eval-when (:compile-toplevel :load-toplevel :execute)
(defconstant +buffer-speed+ #+clx-debugging 1 #-clx-debugging 3
"Speed compiler option for buffer code.")
(defconstant +buffer-safety+ #+clx-debugging 3 #-clx-debugging 0
"Safety compiler option for buffer code.")
(defconstant +buffer-debug+ #+clx-debugging 2 #-clx-debugging 1
"Debug compiler option for buffer code>")
(defun declare-bufmac ()
`(declare (optimize
(speed ,+buffer-speed+)
(safety ,+buffer-safety+)
(debug ,+buffer-debug+))))
;; It's my impression that in lucid there's some way to make a
;; declaration called fast-entry or something that causes a function
;; to not do some checking on args. Sadly, we have no lucid manuals
;; here. If such a declaration is available, it would be a good
;; idea to make it here when +buffer-speed+ is 3 and +buffer-safety+
;; is 0.
(defun declare-buffun ()
`(declare (optimize
(speed ,+buffer-speed+)
(safety ,+buffer-safety+)
(debug ,+buffer-debug+)))))
(declaim (inline card8->int8 int8->card8
card16->int16 int16->card16
card32->int32 int32->card32))
(defun card8->int8 (x)
(declare (type card8 x))
(declare (clx-values int8))
#.(declare-buffun)
(the int8 (if (logbitp 7 x)
(the int8 (- x #x100))
x)))
(defun int8->card8 (x)
(declare (type int8 x))
(declare (clx-values card8))
#.(declare-buffun)
(the card8 (ldb (byte 8 0) x)))
(defun card16->int16 (x)
(declare (type card16 x))
(declare (clx-values int16))
#.(declare-buffun)
(the int16 (if (logbitp 15 x)
(the int16 (- x #x10000))
x)))
(defun int16->card16 (x)
(declare (type int16 x))
(declare (clx-values card16))
#.(declare-buffun)
(the card16 (ldb (byte 16 0) x)))
(defun card32->int32 (x)
(declare (type card32 x))
(declare (clx-values int32))
#.(declare-buffun)
(the int32 (if (logbitp 31 x)
(the int32 (- x #x100000000))
x)))
(defun int32->card32 (x)
(declare (type int32 x))
(declare (clx-values card32))
#.(declare-buffun)
(the card32 (ldb (byte 32 0) x)))
(declaim (inline aref-card8 aset-card8 aref-int8 aset-int8))
(declaim (inline aref-card16 aref-int16 aref-card32 aref-int32 aref-card29
aset-card16 aset-int16 aset-card32 aset-int32 aset-card29))
(defun aref-card8 (a i)
(declare (type buffer-bytes a)
(type array-index i))
(declare (clx-values card8))
#.(declare-buffun)
(the card8 (sys:memref a #.(sys::mdparam 'comp::md-lvector-data0-norm) i
:unsigned-byte)))
(defun aset-card8 (v a i)
(declare (type card8 v)
(type buffer-bytes a)
(type array-index i))
#.(declare-buffun)
(setf (sys:memref a #.(sys::mdparam 'comp::md-lvector-data0-norm) i
:unsigned-byte) v))
(defun aref-int8 (a i)
(declare (type buffer-bytes a)
(type array-index i))
(declare (clx-values int8))
#.(declare-buffun)
(the int8 (sys:memref a #.(sys::mdparam 'comp::md-lvector-data0-norm) i
:signed-byte)))
(defun aset-int8 (v a i)
(declare (type int8 v)
(type buffer-bytes a)
(type array-index i))
#.(declare-buffun)
(setf (sys:memref a #.(sys::mdparam 'comp::md-lvector-data0-norm) i
:signed-byte) v))
(defun aref-card16 (a i)
(declare (type buffer-bytes a)
(type array-index i))
(declare (clx-values card16))
#.(declare-buffun)
(the card16 (sys:memref a #.(sys::mdparam 'comp::md-lvector-data0-norm) i
:unsigned-word)))
(defun aset-card16 (v a i)
(declare (type card16 v)
(type buffer-bytes a)
(type array-index i))
#.(declare-buffun)
(setf (sys:memref a #.(sys::mdparam 'comp::md-lvector-data0-norm) i
:unsigned-word) v))
(defun aref-int16 (a i)
(declare (type buffer-bytes a)
(type array-index i))
(declare (clx-values int16))
#.(declare-buffun)
(the int16 (sys:memref a #.(sys::mdparam 'comp::md-lvector-data0-norm) i
:signed-word)))
(defun aset-int16 (v a i)
(declare (type int16 v)
(type buffer-bytes a)
(type array-index i))
#.(declare-buffun)
(setf (sys:memref a #.(sys::mdparam 'comp::md-lvector-data0-norm) i
:signed-word) v))
(defun aref-card32 (a i)
(declare (type buffer-bytes a)
(type array-index i))
(declare (clx-values card32))
#.(declare-buffun)
(the card32 (sys:memref a #.(sys::mdparam 'comp::md-lvector-data0-norm) i
:unsigned-long)))
(defun aset-card32 (v a i)
(declare (type card32 v)
(type buffer-bytes a)
(type array-index i))
#.(declare-buffun)
(setf (sys:memref a #.(sys::mdparam 'comp::md-lvector-data0-norm) i
:unsigned-long) v))
(defun aref-int32 (a i)
(declare (type buffer-bytes a)
(type array-index i))
(declare (clx-values int32))
#.(declare-buffun)
(the int32 (sys:memref a #.(sys::mdparam 'comp::md-lvector-data0-norm) i
:signed-long)))
(defun aset-int32 (v a i)
(declare (type int32 v)
(type buffer-bytes a)
(type array-index i))
#.(declare-buffun)
(setf (sys:memref a #.(sys::mdparam 'comp::md-lvector-data0-norm) i
:signed-long) v))
(defun aref-card29 (a i)
(declare (type buffer-bytes a)
(type array-index i))
(declare (clx-values card29))
#.(declare-buffun)
(the card29 (sys:memref a #.(sys::mdparam 'comp::md-lvector-data0-norm) i
:unsigned-long)))
(defun aset-card29 (v a i)
(declare (type card29 v)
(type buffer-bytes a)
(type array-index i))
#.(declare-buffun)
(setf (sys:memref a #.(sys::mdparam 'comp::md-lvector-data0-norm) i
:unsigned-long) v))
(defsetf aref-card8 (a i) (v)
`(aset-card8 ,v ,a ,i))
(defsetf aref-int8 (a i) (v)
`(aset-int8 ,v ,a ,i))
(defsetf aref-card16 (a i) (v)
`(aset-card16 ,v ,a ,i))
(defsetf aref-int16 (a i) (v)
`(aset-int16 ,v ,a ,i))
(defsetf aref-card32 (a i) (v)
`(aset-card32 ,v ,a ,i))
(defsetf aref-int32 (a i) (v)
`(aset-int32 ,v ,a ,i))
(defsetf aref-card29 (a i) (v)
`(aset-card29 ,v ,a ,i))
;;; Other random conversions
(defun rgb-val->card16 (value)
;; Short floats are good enough
(declare (type rgb-val value))
(declare (clx-values card16))
#.(declare-buffun)
;; Convert VALUE from float to card16
(the card16 (values (round (the rgb-val value) #.(/ 1.0s0 #xffff)))))
(defun card16->rgb-val (value)
;; Short floats are good enough
(declare (type card16 value))
(declare (clx-values short-float))
#.(declare-buffun)
;; Convert VALUE from card16 to float
(the short-float (* (the card16 value) #.(/ 1.0s0 #xffff))))
(defun radians->int16 (value)
;; Short floats are good enough
(declare (type angle value))
(declare (clx-values int16))
#.(declare-buffun)
(the int16 (values (round (the angle value) #.(float (/ pi 180.0s0 64.0s0) 0.0s0)))))
(defun int16->radians (value)
;; Short floats are good enough
(declare (type int16 value))
(declare (clx-values short-float))
#.(declare-buffun)
(the short-float (* (the int16 value) #.(coerce (/ pi 180.0 64.0) 'short-float))))
;;-----------------------------------------------------------------------------
;; Character transformation
;;-----------------------------------------------------------------------------
;;; This stuff transforms chars to ascii codes in card8's and back.
;;; You might have to hack it a little to get it to work for your machine.
(declaim (inline char->card8 card8->char))
(macrolet ((char-translators ()
(let ((alist
`(#-lispm
;; The normal ascii codes for the control characters.
,@`((#\Return . 13)
(#\Linefeed . 10)
(#\Rubout . 127)
(#\Page . 12)
(#\Tab . 9)
(#\Backspace . 8)
(#\Newline . 10)
(#\Space . 32))
(#\! . 33) (#\" . 34) (#\# . 35) (#\$ . 36)
(#\% . 37) (#\& . 38) (#\' . 39) (#\( . 40)
(#\) . 41) (#\* . 42) (#\+ . 43) (#\, . 44)
(#\- . 45) (#\. . 46) (#\/ . 47) (#\0 . 48)
(#\1 . 49) (#\2 . 50) (#\3 . 51) (#\4 . 52)
(#\5 . 53) (#\6 . 54) (#\7 . 55) (#\8 . 56)
(#\9 . 57) (#\: . 58) (#\; . 59) (#\< . 60)
(#\= . 61) (#\> . 62) (#\? . 63) (#\@ . 64)
(#\A . 65) (#\B . 66) (#\C . 67) (#\D . 68)
(#\E . 69) (#\F . 70) (#\G . 71) (#\H . 72)
(#\I . 73) (#\J . 74) (#\K . 75) (#\L . 76)
(#\M . 77) (#\N . 78) (#\O . 79) (#\P . 80)
(#\Q . 81) (#\R . 82) (#\S . 83) (#\T . 84)
(#\U . 85) (#\V . 86) (#\W . 87) (#\X . 88)
(#\Y . 89) (#\Z . 90) (#\[ . 91) (#\\ . 92)
(#\] . 93) (#\^ . 94) (#\_ . 95) (#\` . 96)
(#\a . 97) (#\b . 98) (#\c . 99) (#\d . 100)
(#\e . 101) (#\f . 102) (#\g . 103) (#\h . 104)
(#\i . 105) (#\j . 106) (#\k . 107) (#\l . 108)
(#\m . 109) (#\n . 110) (#\o . 111) (#\p . 112)
(#\q . 113) (#\r . 114) (#\s . 115) (#\t . 116)
(#\u . 117) (#\v . 118) (#\w . 119) (#\x . 120)
(#\y . 121) (#\z . 122) (#\{ . 123) (#\| . 124)
(#\} . 125) (#\~ . 126))))
(cond ((dolist (pair alist nil)
(when (not (= (char-code (car pair)) (cdr pair)))
(return t)))
`(progn
(defconstant *char-to-card8-translation-table*
',(let ((array (make-array
(let ((max-char-code 255))
(dolist (pair alist)
(setq max-char-code
(max max-char-code
(char-code (car pair)))))
(1+ max-char-code))
:element-type 'card8)))
(dotimes (i (length array))
(setf (aref array i) (mod i 256)))
(dolist (pair alist)
(setf (aref array (char-code (car pair)))
(cdr pair)))
array))
(defconstant *card8-to-char-translation-table*
',(let ((array (make-array 256)))
(dotimes (i (length array))
(setf (aref array i) (code-char i)))
(dolist (pair alist)
(setf (aref array (cdr pair)) (car pair)))
array))
(defun char->card8 (char)
(declare (type base-char char))
#.(declare-buffun)
(the card8 (aref (the (simple-array card8 (*))
*char-to-card8-translation-table*)
(the array-index (char-code char)))))
(defun card8->char (card8)
(declare (type card8 card8))
#.(declare-buffun)
(the base-char
(or (aref (the simple-vector *card8-to-char-translation-table*)
card8)
(error "Invalid CHAR code ~D." card8))))
(dotimes (i 256)
(unless (= i (char->card8 (card8->char i)))
(warn "The card8->char mapping is not invertible through char->card8. Info:~%~S"
(list i
(card8->char i)
(char->card8 (card8->char i))))
(return nil)))
(dotimes (i (length *char-to-card8-translation-table*))
(let ((char (code-char i)))
(unless (eql char (card8->char (char->card8 char)))
(warn "The char->card8 mapping is not invertible through card8->char. Info:~%~S"
(list char
(char->card8 char)
(card8->char (char->card8 char))))
(return nil))))))
(t
`(progn
(defun char->card8 (char)
(declare (type base-char char))
#.(declare-buffun)
(the card8 (char-code char)))
(defun card8->char (card8)
(declare (type card8 card8))
#.(declare-buffun)
(the base-char (code-char card8)))
))))))
(char-translators))
;;-----------------------------------------------------------------------------
;; Process Locking
;;
;; Common-Lisp doesn't provide process locking primitives, so we define
;; our own here, based on Zetalisp primitives. Holding-Lock is very
;; similar to with-lock on The TI Explorer, and a little more efficient
;; than with-process-lock on a Symbolics.
;;-----------------------------------------------------------------------------
;;; MAKE-PROCESS-LOCK: Creating a process lock.
(defun make-process-lock (name)
(mp:make-process-lock :name name))
;;; HOLDING-LOCK: Execute a body of code with a lock held.
;;; The holding-lock macro takes a timeout keyword argument. EVENT-LISTEN
;;; passes its timeout to the holding-lock macro, so any timeout you want to
;;; work for event-listen you should do for holding-lock.
;; If you're not sharing DISPLAY objects within a multi-processing
;; shared-memory environment, this is sufficient
(defmacro holding-lock ((locator display &optional whostate &key timeout)
&body body)
(declare (ignore display))
`(let (.hl-lock. .hl-obtained-lock. .hl-curproc.)
(unwind-protect
(block .hl-doit.
(when (sys:scheduler-running-p) ; fast test for scheduler running
(setq .hl-lock. ,locator
.hl-curproc. mp::*current-process*)
(when (and .hl-curproc. ; nil if in process-wait fun
(not (eq (mp::process-lock-locker .hl-lock.)
.hl-curproc.)))
;; Then we need to grab the lock.
,(if timeout
`(if (not (mp::process-lock .hl-lock. .hl-curproc.
,whostate ,timeout))
(return-from .hl-doit. nil))
`(mp::process-lock .hl-lock. .hl-curproc.
,@(when whostate `(,whostate))))
;; There is an apparent race condition here. However, there is
;; no actual race condition -- our implementation of mp:process-
;; lock guarantees that the lock will still be held when it
;; returns, and no interrupt can happen between that and the
;; execution of the next form. -- jdi 2/27/91
(setq .hl-obtained-lock. t)))
,@body)
(if (and .hl-obtained-lock.
;; Note -- next form added to allow error handler inside
;; body to unlock the lock prematurely if it knows that
;; the current process cannot possibly continue but will
;; throw out (or is it throw up?).
(eq (mp::process-lock-locker .hl-lock.) .hl-curproc.))
(mp::process-unlock .hl-lock. .hl-curproc.)))))
;;; WITHOUT-ABORTS
;;; If you can inhibit asynchronous keyboard aborts inside the body of this
;;; macro, then it is a good idea to do this. This macro is wrapped around
;;; request writing and reply reading to ensure that requests are atomically
;;; written and replies are atomically read from the stream.
(defmacro without-aborts (&body body)
#- (and allegro-version>= allegro-v10.1)
`(excl:without-interrupts ,@body)
#+ (and allegro-version>= allegro-v10.1)
`(excl:with-delayed-interrupts ,@body))
;;; PROCESS-BLOCK: Wait until a given predicate returns a non-NIL value.
;;; Caller guarantees that PROCESS-WAKEUP will be called after the predicate's
;;; value changes.
(defun process-block (whostate predicate &rest predicate-args)
(if (sys:scheduler-running-p)
(apply #'mp::process-wait whostate predicate predicate-args)
(or (apply predicate predicate-args)
(error "Program tried to wait with no scheduler."))))
;;; PROCESS-WAKEUP: Check some other process' wait function.
(declaim (inline process-wakeup))
(defun process-wakeup (process)
(let ((curproc mp::*current-process*))
(when (and curproc process)
(unless (mp::process-p curproc)
(error "~s is not a process" curproc))
(unless (mp::process-p process)
(error "~s is not a process" process))
(if (> (mp::process-priority process) (mp::process-priority curproc))
(mp::process-allow-schedule process)))))
;;; CURRENT-PROCESS: Return the current process object for input locking and
;;; for calling PROCESS-WAKEUP.
(declaim (inline current-process))
;;; Default return NIL, which is acceptable even if there is a scheduler.
(defun current-process ()
(and (sys:scheduler-running-p)
mp::*current-process*))
;;; WITHOUT-INTERRUPTS -- provide for atomic operations.
(defmacro without-interrupts (&body body)
#- (and allegro-version>= allegro-v10.1)
`(excl:without-interrupts ,@body)
#+ (and allegro-version>= allegro-v10.1)
`(excl:with-delayed-interrupts ,@body))
;;; CONDITIONAL-STORE:
;; This should use GET-SETF-METHOD to avoid evaluating subforms multiple times.
;; It doesn't because CLtL doesn't pass the environment to GET-SETF-METHOD.
(defmacro conditional-store (place old-value new-value)
`(without-interrupts
(cond ((eq ,place ,old-value)
(setf ,place ,new-value)
t))))
;;;----------------------------------------------------------------------------
;;; IO Error Recovery
;;; All I/O operations are done within a WRAP-BUF-OUTPUT macro.
;;; It prevents multiple mindless errors when the network craters.
;;;
;;;----------------------------------------------------------------------------
(defmacro wrap-buf-output ((buffer) &body body)
;; Error recovery wrapper
`(unless (buffer-dead ,buffer)
,@body))
(defmacro wrap-buf-input ((buffer) &body body)
(declare (ignore buffer))
;; Error recovery wrapper
`(progn ,@body))
;;;----------------------------------------------------------------------------
;;; System dependent IO primitives
;;; Functions for opening, reading writing forcing-output and closing
;;; the stream to the server.
;;;----------------------------------------------------------------------------
;;; OPEN-X-STREAM - create a stream for communicating to the appropriate X
;;; server
;;
;; On AllegroCL the Display stream actually is a stream!
;;
(defun open-x-stream (host display protocol)
(declare (ignore protocol)) ;; assume TCP
(let ((stream (socket:make-socket :remote-host (string host)
:remote-port (+ *x-tcp-port* display)
:format :binary)))
(if (streamp stream)
stream
(error "Cannot connect to server: ~A:~D" host display))))
;;; BUFFER-READ-DEFAULT - read data from the X stream
(defun buffer-read-default (display vector start end timeout)
(declare (type display display)
(type buffer-bytes vector)
(type array-index start end)
(type (or null (real 0 *)) timeout))
#.(declare-buffun)
(let* ((howmany (- end start))
(stream (display-input-stream display)))
(declare (type array-index howmany)
(type (or null stream) stream))
(or (cond ((stream-char-avail-p stream) nil)
((and timeout (= timeout 0)) :timeout)
((buffer-input-wait-default display timeout)))
(stream-read-bytes stream vector start howmany))))
;;; WARNING:
;;; CLX performance will suffer if your lisp uses read-byte for
;;; receiving all data from the X Window System server.
;;; You are encouraged to write a specialized version of
;;; buffer-read-default that does block transfers.
;;; BUFFER-WRITE-DEFAULT - write data to the X stream
(defun buffer-write-default (vector display start end)
(declare (type buffer-bytes vector)
(type display display)
(type array-index start end))
#.(declare-buffun)
(let ((stream (display-output-stream display)))
(unless (null stream)
(write-sequence vector stream :start start :end end)))
)
;;; WARNING:
;;; CLX performance will be severely degraded if your lisp uses
;;; write-byte to send all data to the X Window System server.
;;; You are STRONGLY encouraged to write a specialized version
;;; of buffer-write-default that does block transfers.
;;; buffer-force-output-default - force output to the X stream
(defun buffer-force-output-default (display)
;; The default buffer force-output function for use with common-lisp streams
(declare (type display display))
(let ((stream (display-output-stream display)))
(declare (type (or null stream) stream))
(unless (null stream)
(force-output stream))))
;;; BUFFER-CLOSE-DEFAULT - close the X stream
(defun buffer-close-default (display &key abort)
;; The default buffer close function for use with common-lisp streams
(declare (type display display))
#.(declare-buffun)
(let ((stream (display-output-stream display)))
(declare (type (or null stream) stream))
(unless (null stream)
(close stream :abort abort))))
;;; BUFFER-INPUT-WAIT-DEFAULT - wait for for input to be available for the
;;; buffer. This is called in read-input between requests, so that a process
;;; waiting for input is abortable when between requests. Should return
;;; :TIMEOUT if it times out, NIL otherwise.
;;; The default implementation
;;
;; This is used so an 'eq' test may be used to find out whether or not we can
;; safely throw this process out of the CLX read loop.
;;
(defparameter *read-whostate* "waiting for input from X server")
;;
;; Note that this function returns nil on error if the scheduler is running,
;; t on error if not. This is ok since buffer-read will detect the error.
;;
(defun buffer-input-wait-default (display timeout)
(declare (type display display)
(type (or null (real 0 *)) timeout))
(declare (clx-values timeout))
(let ((stream (display-input-stream display)))
(declare (type (or null stream) stream))
(cond ((stream-char-avail-p stream)
nil)
;; Otherwise no bytes were available on the socket
((and timeout (= timeout 0))
;; If there aren't enough and timeout == 0, timeout.
:timeout)
;; If the scheduler is running let it do timeouts.
(t
(if (not
(mp:wait-for-input-available stream :whostate *read-whostate*
:wait-function #'stream-char-avail-p
:timeout timeout))
(return-from buffer-input-wait-default :timeout))
))))
;;; BUFFER-LISTEN-DEFAULT - returns T if there is input available for the
;;; buffer. This should never block, so it can be called from the scheduler.
(defun buffer-listen-default (display)
(declare (type display display))
(let ((stream (display-input-stream display)))
(declare (type (or null stream) stream))
(stream-char-avail-p stream)))
;;;----------------------------------------------------------------------------
;;; System dependent speed hacks
;;;----------------------------------------------------------------------------
;;
;; WITH-STACK-LIST is used by WITH-STATE as a memory saving feature.
;; If your lisp doesn't have stack-lists, and you're worried about
;; consing garbage, you may want to re-write this to allocate and
;; initialize lists from a resource.
;;
(defmacro with-stack-list ((var &rest elements) &body body)
;; SYNTAX: (WITH-STACK-LIST (var exp1 ... expN) body)
;; Equivalent to (LET ((var (MAPCAR #'EVAL '(exp1 ... expN)))) body)
;; except that the list produced by MAPCAR resides on the stack and
;; therefore DISAPPEARS when WITH-STACK-LIST is exited.
`(let ((,var (list ,@elements)))
(declare (type cons ,var)
(dynamic-extent ,var))
,@body))
(defmacro with-stack-list* ((var &rest elements) &body body)
;; SYNTAX: (WITH-STACK-LIST* (var exp1 ... expN) body)
;; Equivalent to (LET ((var (APPLY #'LIST* (MAPCAR #'EVAL '(exp1 ... expN))))) body)
;; except that the list produced by MAPCAR resides on the stack and
;; therefore DISAPPEARS when WITH-STACK-LIST is exited.
`(let ((,var (list* ,@elements)))
(declare (type cons ,var)
(dynamic-extent ,var))
,@body))
(declaim (inline buffer-replace))
(defun buffer-replace (target-sequence source-sequence target-start
target-end &optional (source-start 0))
(declare (type buffer-bytes target-sequence source-sequence)
(type array-index target-start target-end source-start)
(optimize (speed 3) (safety 0)))
(let ((source-end (length source-sequence)))
(declare (type array-index source-end))
(excl:if* (and (eq target-sequence source-sequence)
(> target-start source-start))
then (let ((nelts (min (- target-end target-start)
(- source-end source-start))))
(do ((target-index (+ target-start nelts -1) (1- target-index))
(source-index (+ source-start nelts -1) (1- source-index)))
((= target-index (1- target-start)) target-sequence)
(declare (type array-index target-index source-index))
(setf (aref target-sequence target-index)
(aref source-sequence source-index))))
else (do ((target-index target-start (1+ target-index))
(source-index source-start (1+ source-index)))
((or (= target-index target-end) (= source-index source-end))
target-sequence)
(declare (type array-index target-index source-index))
(setf (aref target-sequence target-index)
(aref source-sequence source-index))))))
(defmacro with-gcontext-bindings ((gc saved-state indexes ts-index temp-mask temp-gc)
&body body)
(let ((local-state (gensym))
(resets nil))
(dolist (index indexes)
(push `(setf (svref ,local-state ,index) (svref ,saved-state ,index))
resets))
`(unwind-protect
(progn
,@body)
(let ((,local-state (gcontext-local-state ,gc)))
(declare (type gcontext-state ,local-state))
,@resets
(setf (svref ,local-state ,ts-index) 0))
(when ,temp-gc
(restore-gcontext-temp-state ,gc ,temp-mask ,temp-gc))
(deallocate-gcontext-state ,saved-state))))
;;;----------------------------------------------------------------------------
;;; How much error detection should CLX do?
;;; Several levels are possible:
;;;
;;; 1. Do the equivalent of check-type on every argument.
;;;
;;; 2. Simply report TYPE-ERROR. This eliminates overhead of all the format
;;; strings generated by check-type.
;;;
;;; 3. Do error checking only on arguments that are likely to have errors
;;; (like keyword names)
;;;
;;; 4. Do error checking only where not doing so may dammage the envirnment
;;; on a non-tagged machine (i.e. when storing into a structure that has
;;; been passed in)
;;;
;;; 5. No extra error detection code. On lispm's, ASET may barf trying to
;;; store a non-integer into a number array.
;;;
;;; How extensive should the error checking be? For example, if the server
;;; expects a CARD16, is is sufficient for CLX to check for integer, or
;;; should it also check for non-negative and less than 65536?
;;;----------------------------------------------------------------------------
;; The +TYPE-CHECK?+ constant controls how much error checking is done.
;; Possible values are:
;; NIL - Don't do any error checking
;; t - Do the equivalent of checktype on every argument
;; :minimal - Do error checking only where errors are likely
;;; This controls macro expansion, and isn't changable at run-time You will
;;; probably want to set this to nil if you want good performance at
;;; production time.
(defconstant +type-check?+ nil)
;; TYPE? is used to allow the code to do error checking at a different level from
;; the declarations. It also does some optimizations for systems that don't have
;; good compiler support for TYPEP. The definitions for CARD32, CARD16, INT16, etc.
;; include range checks. You can modify TYPE? to do less extensive checking
;; for these types if you desire.
;;
;; ### This comment is a lie! TYPE? is really also used for run-time type
;; dispatching, not just type checking. -- Ram.
(defmacro type? (object type)
(if (not (constantp type))
`(typep ,object ,type)
(progn
(setq type (eval type))
(let ((predicate (assoc type
'((drawable drawable-p) (window window-p)
(pixmap pixmap-p) (cursor cursor-p)
(font font-p) (gcontext gcontext-p)
(colormap colormap-p) (null null)
(integer integerp)))))
(cond (predicate
`(,(second predicate) ,object))
((eq type 'generalized-boolean)
't) ; Everything is a generalized-boolean.
(+type-check?+
`(locally (declare (optimize safety)) (typep ,object ',type)))
(t
`(typep ,object ',type)))))))
;; X-TYPE-ERROR is the function called for type errors.
;; If you want lots of checking, but are concerned about code size,
;; this can be made into a macro that ignores some parameters.
(defun x-type-error (object type &optional error-string)
(x-error 'x-type-error
:datum object
:expected-type type
:type-string error-string))
;;-----------------------------------------------------------------------------
;; Error handlers
;; Hack up KMP error signaling using zetalisp until the real thing comes
;; along
;;-----------------------------------------------------------------------------
(defun default-error-handler (display error-key &rest key-vals
&key asynchronous &allow-other-keys)
(declare (type generalized-boolean asynchronous)
(dynamic-extent key-vals))
;; The default display-error-handler.
;; It signals the conditions listed in the DISPLAY file.
(if asynchronous
(apply #'x-cerror "Ignore" error-key :display display :error-key error-key key-vals)
(apply #'x-error error-key :display display :error-key error-key key-vals)))
(defun x-error (condition &rest keyargs)
(declare (dynamic-extent keyargs))
(apply #'error condition keyargs))
(defun x-cerror (proceed-format-string condition &rest keyargs)
(declare (dynamic-extent keyargs))
(apply #'cerror proceed-format-string condition keyargs))
(define-condition x-error (error) ())
;;-----------------------------------------------------------------------------
;; HOST hacking
;;-----------------------------------------------------------------------------
#+(and allegro-version>= allegro-v10.1)
(eval-when (:compile-toplevel :execute :load-toplevel)
(require :sock))
#-(and allegro-version>= allegro-v10.1)
(eval-when (compile-toplevel execute load-toplevel)
(require :gray-compat)
(require :sock))
#+(and allegro-version>= allegro-v10.1)
(defun host-address (host &optional (family :internet))
(ecase family
(:internet
(cons :internet
(multiple-value-list
(socket:ipaddr-to-dotted (socket:lookup-hostname host)
:values t))))))
#-(and allegro-version>= allegro-v10.1)
(defun host-address (host &optional (family :internet))
;; Return a list whose car is the family keyword (:internet :DECnet :Chaos)
;; and cdr is a list of network address bytes.
(declare (type stringable host)
(type (or null (member :internet :decnet :chaos) card8) family))
(declare (clx-values list))
(labels ((no-host-error ()
(error "Unknown host ~S" host))
(no-address-error ()
(error "Host ~S has no ~S address" host family)))
(let ((hostent 0))
(unwind-protect
(progn
(setf hostent (ipc::gethostbyname (string host)))
(when (zerop hostent)
(no-host-error))
(ecase family
((:internet nil 0)
(unless (= (ipc::hostent-addrtype hostent) 2)
(no-address-error))
(assert (= (ipc::hostent-length hostent) 4))
(let ((addr (ipc::hostent-addr hostent)))
(when (or (member comp::.target.
'(:hp :sgi4d :sony :dec3100)
:test #'eq)
(probe-file "/lib/ld.so"))
;; BSD 4.3 based systems require an extra indirection
(setq addr (si:memref-int addr 0 0 :unsigned-long)))
(list :internet
(si:memref-int addr 0 0 :unsigned-byte)
(si:memref-int addr 1 0 :unsigned-byte)
(si:memref-int addr 2 0 :unsigned-byte)
(si:memref-int addr 3 0 :unsigned-byte))))))
(ff:free-cstruct hostent)))))
;;-----------------------------------------------------------------------------
;; Whether to use closures for requests or not.
;;-----------------------------------------------------------------------------
;;; If this macro expands to non-NIL, then request and locking code is
;;; compiled in a much more compact format, as the common code is shared, and
;;; the specific code is built into a closure that is funcalled by the shared
;;; code. If your compiler makes efficient use of closures then you probably
;;; want to make this expand to T, as it makes the code more compact.
(defmacro use-closures ()
nil)
(defun clx-macroexpand (form env)
(macroexpand form env))
;;-----------------------------------------------------------------------------
;; Resource stuff
;;-----------------------------------------------------------------------------
;;; Utilities
(defun getenv (name)
(sys:getenv name))
(defun get-host-name ()
"Return the same hostname as gethostname(3) would"
;; resources-pathname was using short-site-name for this purpose
(short-site-name))
(defun homedir-file-pathname (name)
(merge-pathnames (user-homedir-pathname) (pathname name)))
;;; DEFAULT-RESOURCES-PATHNAME - The pathname of the resources file to load if
;;; a resource manager isn't running.
(defun default-resources-pathname ()
(homedir-file-pathname ".Xdefaults"))
;;; RESOURCES-PATHNAME - The pathname of the resources file to load after the
;;; defaults have been loaded.
(defun resources-pathname ()
(or (let ((string (getenv "XENVIRONMENT")))
(and string
(pathname string)))
(homedir-file-pathname
(concatenate 'string ".Xdefaults-" (get-host-name)))))
;;; AUTHORITY-PATHNAME - The pathname of the authority file.
(defun authority-pathname ()
(or (let ((xauthority (getenv "XAUTHORITY")))
(and xauthority
(pathname xauthority)))
(homedir-file-pathname ".Xauthority")))
;;; this particular defaulting behaviour is typical to most Unices, I think
(defun get-default-display (&optional display-name)
"Parse the argument DISPLAY-NAME, or the environment variable $DISPLAY
if it is NIL. Display names have the format
[protocol/] [hostname] : [:] displaynumber [.screennumber]
There are two special cases in parsing, to match that done in the Xlib
C language bindings
- If the hostname is ``unix'' or the empty string, any supplied
protocol is ignored and a connection is made using the :local
transport.
- If a double colon separates hostname from displaynumber, the
protocol is assumed to be decnet.
Returns a list of (host display-number screen protocol)."
(let* ((name (or display-name