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1 | ;; Common Lisp bindings for GTK+ v2.x |
2 | ;; Copyright 2000 Espen S. Johnsen <espen@users.sf.net> |
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3 | ;; |
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4 | ;; Permission is hereby granted, free of charge, to any person obtaining |
5 | ;; a copy of this software and associated documentation files (the |
6 | ;; "Software"), to deal in the Software without restriction, including |
7 | ;; without limitation the rights to use, copy, modify, merge, publish, |
8 | ;; distribute, sublicense, and/or sell copies of the Software, and to |
9 | ;; permit persons to whom the Software is furnished to do so, subject to |
10 | ;; the following conditions: |
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11 | ;; |
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12 | ;; The above copyright notice and this permission notice shall be |
13 | ;; included in all copies or substantial portions of the Software. |
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14 | ;; |
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15 | ;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
16 | ;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
17 | ;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
18 | ;; IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
19 | ;; CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
20 | ;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
21 | ;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
22 | |
e7225d0f |
23 | ;; $Id: gcallback.lisp,v 1.36 2006-07-14 10:51:07 espen Exp $ |
c8c48a4c |
24 | |
25 | (in-package "GLIB") |
26 | |
27 | (use-prefix "g") |
28 | |
29 | |
e0d2987b |
30 | ;;;; Callback invokation |
c8c48a4c |
31 | |
6851535e |
32 | (deftype gclosure () 'pointer) |
33 | (register-type 'gclosure '|g_closure_get_type|) |
34 | |
e378b861 |
35 | (defun register-callback-function (function) |
36 | (check-type function (or null symbol function)) |
37 | (register-user-data function)) |
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38 | |
e7225d0f |
39 | ;; Callback marshaller for regular signal handlers |
40 | (define-callback signal-handler-marshal nil |
56ccd5b7 |
41 | ((gclosure gclosure) (return-value gvalue) (n-params unsigned-int) |
42 | (param-values pointer) (invocation-hint pointer) |
e7225d0f |
43 | (callback-id unsigned-long)) |
266ca870 |
44 | (declare (ignore gclosure invocation-hint)) |
e7225d0f |
45 | (callback-trampoline #'invoke-signal-handler callback-id n-params param-values return-value)) |
c8c48a4c |
46 | |
e7225d0f |
47 | ;; Callback marshaller for class handlers |
48 | (define-callback class-handler-marshal nil |
49 | ((gclosure gclosure) (return-value gvalue) (n-params unsigned-int) |
50 | (param-values pointer) (invocation-hint pointer) |
51 | (callback-id unsigned-long)) |
52 | (declare (ignore gclosure invocation-hint)) |
53 | (callback-trampoline #'invoke-callback callback-id n-params param-values return-value)) |
54 | |
55 | ;; Callback marshaller for emission hooks |
56 | (define-callback emission-hook-marshal nil |
56ccd5b7 |
57 | ((invocation-hint pointer) (n-params unsigned-int) (param-values pointer) |
e7225d0f |
58 | (callback-id unsigned-long)) |
5de2b5f6 |
59 | (declare (ignore invocation-hint)) |
e7225d0f |
60 | (callback-trampoline #'invoke-callback callback-id n-params param-values)) |
e0d2987b |
61 | |
e7225d0f |
62 | (defun callback-trampoline (restart-wrapper callback-id n-params param-values |
63 | &optional (return-value (make-pointer 0))) |
c8c48a4c |
64 | (let* ((return-type (unless (null-pointer-p return-value) |
e378b861 |
65 | (gvalue-type return-value))) |
34f9e1d4 |
66 | (args (loop |
67 | for n from 0 below n-params |
832df308 |
68 | for offset from 0 by +gvalue-size+ |
77a843ca |
69 | collect (gvalue-peek (pointer+ param-values offset))))) |
832df308 |
70 | (unwind-protect |
e7225d0f |
71 | (multiple-value-bind (result aborted-p) |
72 | (apply restart-wrapper callback-id nil args) |
73 | (when (and return-type (not aborted-p)) |
832df308 |
74 | (gvalue-set return-value result))) |
77a843ca |
75 | ;; TODO: this should be made more general, by adding a type |
e7225d0f |
76 | ;; method to return invalidating functions. |
832df308 |
77 | (loop |
78 | for arg in args |
77a843ca |
79 | when (typep arg 'struct) |
832df308 |
80 | do (invalidate-instance arg))))) |
81 | |
e7225d0f |
82 | (defun invoke-signal-handler (callback-id return-type &rest args) |
83 | (declare (ignore return-type)) |
84 | (let* ((instance (first args)) |
85 | (handler-id (signal-handler-find instance '(:data) |
86 | 0 0 nil nil callback-id))) |
87 | (signal-handler-block instance handler-id) |
88 | (unwind-protect |
89 | (restart-case (apply #'invoke-callback callback-id nil args) |
90 | (abort () :report "Disconnect and exit signal handler" |
91 | (when (signal-handler-is-connected-p instance handler-id) |
92 | (signal-handler-disconnect instance handler-id)) |
93 | (values nil t)))) |
94 | (when (signal-handler-is-connected-p instance handler-id) |
95 | (signal-handler-unblock instance handler-id)))) |
34f9e1d4 |
96 | |
8755b1a5 |
97 | (defun invoke-callback (callback-id return-type &rest args) |
e7225d0f |
98 | (restart-case (apply (find-user-data callback-id) args) |
34f9e1d4 |
99 | (continue nil :report "Return from callback function" |
e7225d0f |
100 | (cond |
101 | (return-type |
102 | (format *query-io* "Enter return value of type ~S: " return-type) |
103 | (force-output *query-io*) |
104 | (eval (read *query-io*))) |
105 | (t (values nil t)))) |
34f9e1d4 |
106 | (re-invoke nil :report "Re-invoke callback function" |
e7225d0f |
107 | (apply #'invoke-callback callback-id return-type args)))) |
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108 | |
c8c48a4c |
109 | |
e378b861 |
110 | ;;;; Timeouts and idle functions |
111 | |
acd28982 |
112 | (defconstant +priority-high+ -100) |
113 | (defconstant +priority-default+ 0) |
114 | (defconstant +priority-high-idle+ 100) |
115 | (defconstant +priority-default-idle+ 200) |
116 | (defconstant +priority-low+ 300) |
117 | |
118 | (defbinding source-remove () boolean |
119 | (tag unsigned-int)) |
120 | |
56ccd5b7 |
121 | (define-callback source-callback-marshal nil ((callback-id unsigned-int)) |
e0d2987b |
122 | (callback-trampoline callback-id 0 nil)) |
e378b861 |
123 | |
124 | (defbinding (timeout-add "g_timeout_add_full") |
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125 | (interval function &optional (priority +priority-default+)) unsigned-int |
e378b861 |
126 | (priority int) |
127 | (interval unsigned-int) |
56ccd5b7 |
128 | (source-callback-marshal callback) |
e378b861 |
129 | ((register-callback-function function) unsigned-long) |
56ccd5b7 |
130 | (user-data-destroy-callback callback)) |
e378b861 |
131 | |
acd28982 |
132 | (defun timeout-remove (timeout) |
133 | (source-remove timeout)) |
134 | |
e378b861 |
135 | (defbinding (idle-add "g_idle_add_full") |
acd28982 |
136 | (function &optional (priority +priority-default-idle+)) unsigned-int |
e378b861 |
137 | (priority int) |
56ccd5b7 |
138 | (source-callback-marshal callback) |
e378b861 |
139 | ((register-callback-function function) unsigned-long) |
56ccd5b7 |
140 | (user-data-destroy-callback callback)) |
e378b861 |
141 | |
acd28982 |
142 | (defun idle-remove (idle) |
143 | (source-remove idle)) |
e378b861 |
144 | |
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145 | |
e0d2987b |
146 | ;;;; Signal information querying |
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147 | |
e0d2987b |
148 | (defbinding signal-lookup (name type) unsigned-int |
c8c48a4c |
149 | ((signal-name-to-string name) string) |
e0d2987b |
150 | ((find-type-number type t) type-number)) |
c8c48a4c |
151 | |
e0d2987b |
152 | (defbinding signal-name () (copy-of string) |
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153 | (signal-id unsigned-int)) |
154 | |
e0d2987b |
155 | (defbinding signal-list-ids (type) (vector unsigned-int n-ids) |
156 | ((find-type-number type t) type-number) |
157 | (n-ids unsigned-int :out)) |
158 | |
159 | (defun signal-list-names (type) |
160 | (map 'list #'signal-name (signal-list-ids type))) |
161 | |
162 | (defun ensure-signal-id-from-type (signal-id type) |
c8c48a4c |
163 | (etypecase signal-id |
e0d2987b |
164 | (integer (if (signal-name signal-id) |
165 | signal-id |
166 | (error "Invalid signal id: ~D" signal-id))) |
167 | ((or symbol string) |
168 | (let ((numeric-id (signal-lookup signal-id type))) |
169 | (if (zerop numeric-id) |
170 | (error "Invalid signal name for ~S: ~D" type signal-id) |
171 | numeric-id))))) |
172 | |
173 | (defun ensure-signal-id (signal-id instance) |
174 | (ensure-signal-id-from-type signal-id (type-of instance))) |
c8c48a4c |
175 | |
e0d2987b |
176 | (eval-when (:compile-toplevel :load-toplevel :execute) |
177 | (deftype signal-flags () |
178 | '(flags :run-first :run-last :run-cleanup :no-recurse |
179 | :detailed :action :no-hooks)) |
180 | |
e7225d0f |
181 | (define-flags-type signal-match-type |
182 | :id :detail :closure :func :data :unblocked) |
183 | |
e0d2987b |
184 | (defclass signal-query (struct) |
185 | ((id :allocation :alien :type unsigned-int) |
186 | (name :allocation :alien :type (copy-of string)) |
187 | (type :allocation :alien :type type-number) |
188 | (flags :allocation :alien :type signal-flags) |
189 | (return-type :allocation :alien :type type-number) |
190 | (n-params :allocation :alien :type unsigned-int) |
191 | (param-types :allocation :alien :type pointer)) |
192 | (:metaclass struct-class))) |
193 | |
194 | (defbinding signal-query |
195 | (signal-id &optional (signal-query (make-instance 'signal-query))) nil |
196 | (signal-id unsigned-int) |
77a843ca |
197 | (signal-query signal-query :in/return)) |
e0d2987b |
198 | |
199 | (defun signal-param-types (info) |
200 | (with-slots (n-params param-types) info |
201 | (map-c-vector 'list |
202 | #'(lambda (type-number) |
203 | (type-from-number type-number)) |
204 | param-types 'type-number n-params))) |
205 | |
206 | |
207 | (defun describe-signal (signal-id &optional type) |
208 | (let ((info (signal-query (ensure-signal-id-from-type signal-id type)))) |
209 | (with-slots (id name type flags return-type n-params) info |
210 | (format t "The signal with id ~D is named '~A' and may be emitted on instances of type ~S~%~%" id name (type-from-number type t)) |
211 | (format t "Signal handlers should return ~A and take ~A~%" |
212 | (cond |
213 | ((= return-type (find-type-number "void")) "no values") |
214 | ((not (type-from-number return-type)) "values of unknown type") |
215 | ((format nil "values of type ~S" (type-from-number return-type)))) |
216 | (if (zerop n-params) |
217 | "no arguments" |
218 | (format nil "arguments with the following types: ~A" |
219 | (signal-param-types info))))))) |
220 | |
221 | |
222 | ;;;; Signal connecting and controlling |
223 | |
9944c385 |
224 | (defvar *overridden-signals* (make-hash-table :test 'equalp)) |
225 | |
226 | (defbinding %signal-override-class-closure () nil |
227 | (signal-id unsigned-int) |
228 | (type-number type-number) |
229 | (callback-closure pointer)) |
230 | |
231 | |
232 | (defun signal-override-class-closure (name type function) |
233 | (let* ((signal-id (ensure-signal-id-from-type name type)) |
234 | (type-number (find-type-number type t)) |
235 | (callback-id (gethash (cons type-number signal-id) *overridden-signals*))) |
236 | (if callback-id |
237 | (update-user-data callback-id function) |
238 | (multiple-value-bind (callback-closure callback-id) |
e7225d0f |
239 | (make-callback-closure function class-handler-marshal) |
9944c385 |
240 | (%signal-override-class-closure signal-id type-number callback-closure) |
241 | (setf |
242 | (gethash (cons type-number signal-id) *overridden-signals*) |
243 | callback-id))))) |
244 | |
245 | |
246 | (defbinding %signal-chain-from-overridden () nil |
247 | (args pointer) |
248 | (return-value (or null gvalue))) |
249 | |
38049b1a |
250 | |
251 | (defun %call-next-handler (n-params types args return-type) |
9944c385 |
252 | (let ((params (allocate-memory (* n-params +gvalue-size+)))) |
253 | (loop |
38049b1a |
254 | for arg in args |
9944c385 |
255 | for type in types |
256 | for offset from 0 by +gvalue-size+ |
77a843ca |
257 | do (gvalue-init (pointer+ params offset) type arg)) |
9944c385 |
258 | |
259 | (unwind-protect |
260 | (if return-type |
261 | (with-gvalue (return-value return-type) |
262 | (%signal-chain-from-overridden params return-value)) |
263 | (%signal-chain-from-overridden params nil)) |
264 | (progn |
265 | (loop |
266 | repeat n-params |
267 | for offset from 0 by +gvalue-size+ |
77a843ca |
268 | do (gvalue-unset (pointer+ params offset))) |
9944c385 |
269 | (deallocate-memory params))))) |
270 | |
271 | |
272 | (defmacro define-signal-handler (name ((object class) &rest args) &body body) |
273 | (let* ((info (signal-query (ensure-signal-id-from-type name class))) |
274 | (types (cons class (signal-param-types info))) |
275 | (n-params (1+ (slot-value info 'n-params))) |
276 | (return-type (type-from-number (slot-value info 'return-type))) |
277 | (vars (loop |
278 | for arg in args |
279 | until (eq arg '&rest) |
280 | collect arg)) |
281 | (rest (cadr (member '&rest args))) |
38049b1a |
282 | (next (make-symbol "ARGS")) |
283 | (default (make-symbol "DEFAULT"))) |
9944c385 |
284 | |
285 | `(progn |
286 | (signal-override-class-closure ',name ',class |
287 | #'(lambda (,object ,@args) |
38049b1a |
288 | (let ((,default (list* ,object ,@vars ,rest))) |
289 | (flet ((call-next-handler (&rest ,next) |
9944c385 |
290 | (%call-next-handler |
e1fcda22 |
291 | ,n-params ',types (or ,next ,default) ',return-type))) |
292 | ,@body)))) |
9944c385 |
293 | ',name))) |
294 | |
295 | |
e0d2987b |
296 | (defbinding %signal-stop-emission () nil |
c8c48a4c |
297 | (instance ginstance) |
e0d2987b |
298 | (signal-id unsigned-int) |
299 | (detail quark)) |
300 | |
301 | (defvar *signal-stop-emission* nil) |
302 | (declaim (special *signal-stop-emission*)) |
c8c48a4c |
303 | |
e0d2987b |
304 | (defun signal-stop-emission () |
305 | (if *signal-stop-emission* |
306 | (funcall *signal-stop-emission*) |
307 | (error "Not inside a signal handler"))) |
308 | |
309 | |
310 | (defbinding signal-add-emission-hook (type signal function &key (detail 0)) |
e7225d0f |
311 | unsigned-long |
e0d2987b |
312 | ((ensure-signal-id-from-type signal type) unsigned-int) |
313 | (detail quark) |
e7225d0f |
314 | (emission-hook-marshal callback) |
e0d2987b |
315 | ((register-callback-function function) unsigned-int) |
56ccd5b7 |
316 | (user-data-destroy-callback callback)) |
e0d2987b |
317 | |
318 | (defbinding signal-remove-emission-hook (type signal hook-id) nil |
319 | ((ensure-signal-id-from-type signal type) unsigned-int) |
e7225d0f |
320 | (hook-id unsigned-long)) |
c8c48a4c |
321 | |
c8c48a4c |
322 | |
0383dd48 |
323 | (defbinding (signal-has-handler-pending-p "g_signal_has_handler_pending") |
c8c48a4c |
324 | (instance signal-id &key detail blocked) boolean |
325 | (instance ginstance) |
e49e135a |
326 | ((ensure-signal-id signal-id instance) unsigned-int) |
c8c48a4c |
327 | ((or detail 0) quark) |
73572c12 |
328 | (blocked boolean)) |
c8c48a4c |
329 | |
e7225d0f |
330 | (defbinding %signal-connect-closure-by-id () unsigned-long |
c8c48a4c |
331 | (instance ginstance) |
e0d2987b |
332 | (signal-id unsigned-int) |
333 | (detail quark) |
334 | (closure pointer) |
c8c48a4c |
335 | (after boolean)) |
336 | |
0383dd48 |
337 | (defbinding signal-handler-block () nil |
c8c48a4c |
338 | (instance ginstance) |
e7225d0f |
339 | (handler-id unsigned-long)) |
c8c48a4c |
340 | |
0383dd48 |
341 | (defbinding signal-handler-unblock () nil |
c8c48a4c |
342 | (instance ginstance) |
e7225d0f |
343 | (handler-id unsigned-long)) |
344 | |
345 | ;; Internal |
346 | (defbinding signal-handler-find () unsigned-long |
347 | (instance gobject) |
348 | (mask signal-match-type) |
349 | (signal-id unsigned-int) |
350 | (detail quark) |
351 | (closure (or null pointer)) |
352 | (func (or null pointer)) |
353 | (data unsigned-long)) |
c8c48a4c |
354 | |
0383dd48 |
355 | (defbinding signal-handler-disconnect () nil |
c8c48a4c |
356 | (instance ginstance) |
e7225d0f |
357 | (handler-id unsigned-long)) |
e0d2987b |
358 | |
359 | (defbinding signal-handler-is-connected-p () boolean |
360 | (instance ginstance) |
e7225d0f |
361 | (handler-id unsigned-long)) |
c8c48a4c |
362 | |
d75a77ff |
363 | (defbinding (callback-closure-new "clg_callback_closure_new") () gclosure |
e0d2987b |
364 | (callback-id unsigned-int) |
56ccd5b7 |
365 | (callback callback) |
366 | (destroy-notify callback)) |
c8c48a4c |
367 | |
e7225d0f |
368 | (defun make-callback-closure (function marshaller) |
e0d2987b |
369 | (let ((callback-id (register-callback-function function))) |
370 | (values |
e7225d0f |
371 | (callback-closure-new callback-id marshaller user-data-destroy-callback) |
e0d2987b |
372 | callback-id))) |
373 | |
cd9b9e8b |
374 | (defgeneric compute-signal-function (gobject signal function object)) |
65670fe5 |
375 | |
cd9b9e8b |
376 | (defmethod compute-signal-function ((gobject gobject) signal function object) |
377 | (declare (ignore signal)) |
e0d2987b |
378 | (cond |
cd9b9e8b |
379 | ((or (eq object t) (eq object gobject)) function) |
380 | ((not object) |
e0d2987b |
381 | #'(lambda (&rest args) (apply function (rest args)))) |
382 | (t |
cd9b9e8b |
383 | #'(lambda (&rest args) (apply function object (rest args)))))) |
384 | |
385 | |
386 | (defgeneric compute-signal-id (gobject signal)) |
387 | |
388 | (defmethod compute-signal-id ((gobject gobject) signal) |
389 | (ensure-signal-id signal gobject)) |
390 | |
391 | |
392 | (defgeneric signal-connect (gobject signal function &key detail after object remove)) |
393 | |
394 | (defmethod signal-connect :around ((gobject gobject) signal function &rest args) |
395 | (declare (ignore gobject signal args)) |
396 | (when function |
397 | (call-next-method))) |
e0d2987b |
398 | |
65670fe5 |
399 | |
e0d2987b |
400 | (defmethod signal-connect ((gobject gobject) signal function |
cd9b9e8b |
401 | &key detail after object remove) |
e0d2987b |
402 | "Connects a callback function to a signal for a particular object. If |
403 | :OBJECT is T, the object connected to is passed as the first argument |
404 | to the callback function, or if :OBJECT is any other non NIL value, it |
405 | is passed as the first argument instead. If :AFTER is non NIL, the |
406 | handler will be called after the default handler for the signal. If |
407 | :REMOVE is non NIL, the handler will be removed after beeing invoked |
408 | once." |
cd9b9e8b |
409 | (let* ((signal-id (compute-signal-id gobject signal)) |
410 | (detail-quark (if detail (quark-intern detail) 0)) |
411 | (signal-stop-emission |
412 | #'(lambda () |
413 | (%signal-stop-emission gobject signal-id detail-quark))) |
414 | (callback (compute-signal-function gobject signal function object)) |
415 | (wrapper #'(lambda (&rest args) |
416 | (let ((*signal-stop-emission* signal-stop-emission)) |
417 | (apply callback args))))) |
e0d2987b |
418 | (multiple-value-bind (closure-id callback-id) |
e7225d0f |
419 | (make-callback-closure wrapper signal-handler-marshal) |
e0d2987b |
420 | (let ((handler-id (%signal-connect-closure-by-id |
cd9b9e8b |
421 | gobject signal-id detail-quark closure-id after))) |
e0d2987b |
422 | (when remove |
423 | (update-user-data callback-id |
424 | #'(lambda (&rest args) |
425 | (unwind-protect |
426 | (let ((*signal-stop-emission* signal-stop-emission)) |
427 | (apply callback args)) |
e7225d0f |
428 | (when (signal-handler-is-connected-p gobject handler-id) |
429 | (signal-handler-disconnect gobject handler-id)))))) |
cd9b9e8b |
430 | handler-id)))) |
e0d2987b |
431 | |
432 | |
433 | ;;;; Signal emission |
434 | |
435 | (defbinding %signal-emitv () nil |
436 | (gvalues pointer) |
437 | (signal-id unsigned-int) |
438 | (detail quark) |
439 | (return-value gvalue)) |
440 | |
441 | (defvar *signal-emit-functions* (make-hash-table)) |
442 | |
443 | (defun create-signal-emit-function (signal-id) |
444 | (let ((info (signal-query signal-id))) |
445 | (let* ((type (type-from-number (slot-value info 'type))) |
446 | (param-types (cons type (signal-param-types info))) |
447 | (return-type (type-from-number (slot-value info 'return-type))) |
448 | (n-params (1+ (slot-value info 'n-params))) |
449 | (params (allocate-memory (* n-params +gvalue-size+)))) |
450 | #'(lambda (detail object &rest args) |
451 | (unless (= (length args) (1- n-params)) |
452 | (error "Invalid number of arguments: ~A" (+ 2 (length args)))) |
453 | (unwind-protect |
454 | (loop |
455 | for arg in (cons object args) |
456 | for type in param-types |
77a843ca |
457 | as tmp = params then (pointer+ tmp +gvalue-size+) |
e0d2987b |
458 | do (gvalue-init tmp type arg) |
459 | finally |
460 | (if return-type |
461 | (return |
462 | (with-gvalue (return-value) |
463 | (%signal-emitv params signal-id detail return-value))) |
464 | (%signal-emitv params signal-id detail (make-pointer 0)))) |
465 | (loop |
466 | repeat n-params |
77a843ca |
467 | as tmp = params then (pointer+ tmp +gvalue-size+) |
e0d2987b |
468 | while (gvalue-p tmp) |
469 | do (gvalue-unset tmp))))))) |
470 | |
471 | (defun signal-emit-with-detail (object signal detail &rest args) |
472 | (let* ((signal-id (ensure-signal-id signal object)) |
473 | (function (or |
474 | (gethash signal-id *signal-emit-functions*) |
475 | (setf |
476 | (gethash signal-id *signal-emit-functions*) |
477 | (create-signal-emit-function signal-id))))) |
478 | (apply function detail object args))) |
479 | |
480 | (defun signal-emit (object signal &rest args) |
481 | (apply #'signal-emit-with-detail object signal 0 args)) |
482 | |
c0f178d0 |
483 | |
fd1e4a39 |
484 | ;;;; Convenient macros |
485 | |
56ccd5b7 |
486 | (defmacro define-callback-marshal (name return-type args &key (callback-id :last)) |
487 | (let* ((ignore ()) |
488 | (params ()) |
489 | (names (loop |
490 | for arg in args |
491 | collect (if (or |
492 | (eq arg :ignore) |
493 | (and (consp arg) (eq (first arg) :ignore))) |
494 | (let ((name (gensym "IGNORE"))) |
495 | (push name ignore) |
496 | name) |
497 | (let ((name (if (atom arg) |
498 | (gensym (string arg)) |
499 | (first arg)))) |
500 | (push name params) |
501 | name)))) |
502 | (types (loop |
503 | for arg in args |
504 | collect (cond |
505 | ((eq arg :ignore) 'pointer) |
506 | ((atom arg) arg) |
507 | (t (second arg)))))) |
508 | `(define-callback ,name ,return-type |
509 | ,(ecase callback-id |
510 | (:first `((callback-id unsigned-int) ,@(mapcar #'list names types))) |
511 | (:last `(,@(mapcar #'list names types) (callback-id unsigned-int)))) |
512 | (declare (ignore ,@ignore)) |
248f4dd7 |
513 | (invoke-callback callback-id ',return-type ,@(nreverse params))))) |
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514 | |
515 | (defmacro with-callback-function ((id function) &body body) |
516 | `(let ((,id (register-callback-function ,function))) |
517 | (unwind-protect |
518 | (progn ,@body) |
519 | (destroy-user-data ,id)))) |