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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 | |
34c336c4 |
23 | ;; $Id: gcallback.lisp,v 1.45 2007-06-25 13:49:05 espen Exp $ |
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24 | |
25 | (in-package "GLIB") |
26 | |
27 | (use-prefix "g") |
28 | |
29 | |
457f874e |
30 | ;;;; Callback invocation |
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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) |
41932b02 |
43 | (callback-id pointer-data)) |
266ca870 |
44 | (declare (ignore gclosure invocation-hint)) |
e7225d0f |
45 | (callback-trampoline #'invoke-signal-handler callback-id n-params param-values return-value)) |
c8c48a4c |
46 | |
41932b02 |
47 | ;; Callback marshaller for class handlers |
e7225d0f |
48 | (define-callback class-handler-marshal nil |
49 | ((gclosure gclosure) (return-value gvalue) (n-params unsigned-int) |
50 | (param-values pointer) (invocation-hint pointer) |
41932b02 |
51 | (callback-id pointer-data)) |
e7225d0f |
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) |
41932b02 |
58 | (callback-id pointer-data)) |
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) |
bbb73c8a |
90 | (disconnect () :report "Disconnect and exit signal handler" |
e7225d0f |
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 | |
bbb73c8a |
121 | (define-callback source-callback-marshal boolean ((callback-id unsigned-int)) |
122 | (invoke-source-callback callback-id)) |
123 | |
34c336c4 |
124 | (defun invoke-source-callback (callback-id &rest args) |
125 | (restart-case (apply (find-user-data callback-id) args) |
bbb73c8a |
126 | (remove () :report "Exit and remove source callback" |
127 | nil) |
128 | (continue () :report "Return from source callback" |
129 | t) |
130 | (re-invoke nil :report "Re-invoke source callback" |
34c336c4 |
131 | (apply #'invoke-source-callback callback-id args)))) |
bbb73c8a |
132 | |
e378b861 |
133 | |
134 | (defbinding (timeout-add "g_timeout_add_full") |
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135 | (interval function &optional (priority +priority-default+)) unsigned-int |
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136 | (priority int) |
137 | (interval unsigned-int) |
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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 timeout-remove (timeout) |
143 | (source-remove timeout)) |
144 | |
e378b861 |
145 | (defbinding (idle-add "g_idle_add_full") |
acd28982 |
146 | (function &optional (priority +priority-default-idle+)) unsigned-int |
e378b861 |
147 | (priority int) |
56ccd5b7 |
148 | (source-callback-marshal callback) |
e378b861 |
149 | ((register-callback-function function) unsigned-long) |
56ccd5b7 |
150 | (user-data-destroy-callback callback)) |
e378b861 |
151 | |
acd28982 |
152 | (defun idle-remove (idle) |
153 | (source-remove idle)) |
e378b861 |
154 | |
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155 | |
e0d2987b |
156 | ;;;; Signal information querying |
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157 | |
e0d2987b |
158 | (defbinding signal-lookup (name type) unsigned-int |
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159 | ((signal-name-to-string name) string) |
e0d2987b |
160 | ((find-type-number type t) type-number)) |
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161 | |
e0d2987b |
162 | (defbinding signal-name () (copy-of string) |
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163 | (signal-id unsigned-int)) |
164 | |
e0d2987b |
165 | (defbinding signal-list-ids (type) (vector unsigned-int n-ids) |
166 | ((find-type-number type t) type-number) |
167 | (n-ids unsigned-int :out)) |
168 | |
169 | (defun signal-list-names (type) |
170 | (map 'list #'signal-name (signal-list-ids type))) |
171 | |
172 | (defun ensure-signal-id-from-type (signal-id type) |
c8c48a4c |
173 | (etypecase signal-id |
e0d2987b |
174 | (integer (if (signal-name signal-id) |
175 | signal-id |
176 | (error "Invalid signal id: ~D" signal-id))) |
177 | ((or symbol string) |
178 | (let ((numeric-id (signal-lookup signal-id type))) |
179 | (if (zerop numeric-id) |
180 | (error "Invalid signal name for ~S: ~D" type signal-id) |
181 | numeric-id))))) |
182 | |
183 | (defun ensure-signal-id (signal-id instance) |
184 | (ensure-signal-id-from-type signal-id (type-of instance))) |
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185 | |
e0d2987b |
186 | (eval-when (:compile-toplevel :load-toplevel :execute) |
187 | (deftype signal-flags () |
188 | '(flags :run-first :run-last :run-cleanup :no-recurse |
189 | :detailed :action :no-hooks)) |
190 | |
e7225d0f |
191 | (define-flags-type signal-match-type |
192 | :id :detail :closure :func :data :unblocked) |
193 | |
e0d2987b |
194 | (defclass signal-query (struct) |
195 | ((id :allocation :alien :type unsigned-int) |
196 | (name :allocation :alien :type (copy-of string)) |
197 | (type :allocation :alien :type type-number) |
198 | (flags :allocation :alien :type signal-flags) |
199 | (return-type :allocation :alien :type type-number) |
200 | (n-params :allocation :alien :type unsigned-int) |
201 | (param-types :allocation :alien :type pointer)) |
202 | (:metaclass struct-class))) |
203 | |
204 | (defbinding signal-query |
205 | (signal-id &optional (signal-query (make-instance 'signal-query))) nil |
206 | (signal-id unsigned-int) |
77a843ca |
207 | (signal-query signal-query :in/return)) |
e0d2987b |
208 | |
209 | (defun signal-param-types (info) |
210 | (with-slots (n-params param-types) info |
211 | (map-c-vector 'list |
212 | #'(lambda (type-number) |
213 | (type-from-number type-number)) |
214 | param-types 'type-number n-params))) |
215 | |
216 | |
217 | (defun describe-signal (signal-id &optional type) |
218 | (let ((info (signal-query (ensure-signal-id-from-type signal-id type)))) |
219 | (with-slots (id name type flags return-type n-params) info |
457f874e |
220 | (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)) |
221 | (when flags |
222 | (format t " It has the followin invocation flags: ~{~S ~}" flags)) |
223 | (format t "~%~%Signal handlers should take ~A and return ~A~%" |
e0d2987b |
224 | (if (zerop n-params) |
225 | "no arguments" |
226 | (format nil "arguments with the following types: ~A" |
457f874e |
227 | (signal-param-types info))) |
228 | (cond |
229 | ((= return-type (find-type-number "void")) "no values") |
230 | ((not (type-from-number return-type)) "values of unknown type") |
231 | ((format nil "values of type ~S" (type-from-number return-type)))))))) |
e0d2987b |
232 | |
233 | |
234 | ;;;; Signal connecting and controlling |
235 | |
9944c385 |
236 | (defvar *overridden-signals* (make-hash-table :test 'equalp)) |
237 | |
238 | (defbinding %signal-override-class-closure () nil |
239 | (signal-id unsigned-int) |
240 | (type-number type-number) |
241 | (callback-closure pointer)) |
242 | |
243 | |
244 | (defun signal-override-class-closure (name type function) |
245 | (let* ((signal-id (ensure-signal-id-from-type name type)) |
246 | (type-number (find-type-number type t)) |
247 | (callback-id (gethash (cons type-number signal-id) *overridden-signals*))) |
248 | (if callback-id |
249 | (update-user-data callback-id function) |
250 | (multiple-value-bind (callback-closure callback-id) |
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251 | (make-callback-closure function class-handler-marshal) |
9944c385 |
252 | (%signal-override-class-closure signal-id type-number callback-closure) |
253 | (setf |
254 | (gethash (cons type-number signal-id) *overridden-signals*) |
255 | callback-id))))) |
256 | |
257 | |
258 | (defbinding %signal-chain-from-overridden () nil |
259 | (args pointer) |
260 | (return-value (or null gvalue))) |
261 | |
38049b1a |
262 | |
263 | (defun %call-next-handler (n-params types args return-type) |
9944c385 |
264 | (let ((params (allocate-memory (* n-params +gvalue-size+)))) |
265 | (loop |
38049b1a |
266 | for arg in args |
9944c385 |
267 | for type in types |
268 | for offset from 0 by +gvalue-size+ |
77a843ca |
269 | do (gvalue-init (pointer+ params offset) type arg)) |
9944c385 |
270 | |
271 | (unwind-protect |
272 | (if return-type |
273 | (with-gvalue (return-value return-type) |
274 | (%signal-chain-from-overridden params return-value)) |
275 | (%signal-chain-from-overridden params nil)) |
276 | (progn |
277 | (loop |
278 | repeat n-params |
279 | for offset from 0 by +gvalue-size+ |
77a843ca |
280 | do (gvalue-unset (pointer+ params offset))) |
9944c385 |
281 | (deallocate-memory params))))) |
282 | |
283 | |
284 | (defmacro define-signal-handler (name ((object class) &rest args) &body body) |
285 | (let* ((info (signal-query (ensure-signal-id-from-type name class))) |
286 | (types (cons class (signal-param-types info))) |
287 | (n-params (1+ (slot-value info 'n-params))) |
288 | (return-type (type-from-number (slot-value info 'return-type))) |
289 | (vars (loop |
290 | for arg in args |
291 | until (eq arg '&rest) |
292 | collect arg)) |
293 | (rest (cadr (member '&rest args))) |
38049b1a |
294 | (next (make-symbol "ARGS")) |
295 | (default (make-symbol "DEFAULT"))) |
9944c385 |
296 | |
297 | `(progn |
298 | (signal-override-class-closure ',name ',class |
299 | #'(lambda (,object ,@args) |
38049b1a |
300 | (let ((,default (list* ,object ,@vars ,rest))) |
301 | (flet ((call-next-handler (&rest ,next) |
9944c385 |
302 | (%call-next-handler |
e1fcda22 |
303 | ,n-params ',types (or ,next ,default) ',return-type))) |
304 | ,@body)))) |
9944c385 |
305 | ',name))) |
306 | |
307 | |
e0d2987b |
308 | (defbinding %signal-stop-emission () nil |
c8c48a4c |
309 | (instance ginstance) |
e0d2987b |
310 | (signal-id unsigned-int) |
311 | (detail quark)) |
312 | |
313 | (defvar *signal-stop-emission* nil) |
314 | (declaim (special *signal-stop-emission*)) |
c8c48a4c |
315 | |
e0d2987b |
316 | (defun signal-stop-emission () |
317 | (if *signal-stop-emission* |
318 | (funcall *signal-stop-emission*) |
319 | (error "Not inside a signal handler"))) |
320 | |
321 | |
322 | (defbinding signal-add-emission-hook (type signal function &key (detail 0)) |
e7225d0f |
323 | unsigned-long |
e0d2987b |
324 | ((ensure-signal-id-from-type signal type) unsigned-int) |
325 | (detail quark) |
e7225d0f |
326 | (emission-hook-marshal callback) |
e0d2987b |
327 | ((register-callback-function function) unsigned-int) |
56ccd5b7 |
328 | (user-data-destroy-callback callback)) |
e0d2987b |
329 | |
330 | (defbinding signal-remove-emission-hook (type signal hook-id) nil |
331 | ((ensure-signal-id-from-type signal type) unsigned-int) |
e7225d0f |
332 | (hook-id unsigned-long)) |
c8c48a4c |
333 | |
c8c48a4c |
334 | |
0383dd48 |
335 | (defbinding (signal-has-handler-pending-p "g_signal_has_handler_pending") |
c8c48a4c |
336 | (instance signal-id &key detail blocked) boolean |
337 | (instance ginstance) |
e49e135a |
338 | ((ensure-signal-id signal-id instance) unsigned-int) |
c8c48a4c |
339 | ((or detail 0) quark) |
73572c12 |
340 | (blocked boolean)) |
c8c48a4c |
341 | |
e7225d0f |
342 | (defbinding %signal-connect-closure-by-id () unsigned-long |
c8c48a4c |
343 | (instance ginstance) |
e0d2987b |
344 | (signal-id unsigned-int) |
345 | (detail quark) |
346 | (closure pointer) |
c8c48a4c |
347 | (after boolean)) |
348 | |
0383dd48 |
349 | (defbinding signal-handler-block () nil |
c8c48a4c |
350 | (instance ginstance) |
e7225d0f |
351 | (handler-id unsigned-long)) |
c8c48a4c |
352 | |
0383dd48 |
353 | (defbinding signal-handler-unblock () nil |
c8c48a4c |
354 | (instance ginstance) |
e7225d0f |
355 | (handler-id unsigned-long)) |
356 | |
357 | ;; Internal |
358 | (defbinding signal-handler-find () unsigned-long |
359 | (instance gobject) |
360 | (mask signal-match-type) |
361 | (signal-id unsigned-int) |
362 | (detail quark) |
363 | (closure (or null pointer)) |
364 | (func (or null pointer)) |
b7c49e0c |
365 | (data pointer-data)) |
c8c48a4c |
366 | |
0383dd48 |
367 | (defbinding signal-handler-disconnect () nil |
c8c48a4c |
368 | (instance ginstance) |
e7225d0f |
369 | (handler-id unsigned-long)) |
e0d2987b |
370 | |
371 | (defbinding signal-handler-is-connected-p () boolean |
372 | (instance ginstance) |
e7225d0f |
373 | (handler-id unsigned-long)) |
c8c48a4c |
374 | |
d4f4418a |
375 | (defbinding (closure-new "g_cclosure_new") () gclosure |
376 | ((make-pointer #xFFFFFFFF) pointer) |
e0d2987b |
377 | (callback-id unsigned-int) |
56ccd5b7 |
378 | (destroy-notify callback)) |
c8c48a4c |
379 | |
d4f4418a |
380 | (defbinding closure-set-meta-marshal () nil |
381 | (gclosure gclosure) |
382 | (callback-id unsigned-int) |
383 | (callback callback)) |
384 | |
385 | (defun callback-closure-new (callback-id callback destroy-notify) |
386 | (let ((gclosure (closure-new callback-id destroy-notify))) |
387 | (closure-set-meta-marshal gclosure callback-id callback) |
388 | gclosure)) |
389 | |
b7c49e0c |
390 | (defun make-callback-closure (function &optional (marshaller signal-handler-marshal)) |
e0d2987b |
391 | (let ((callback-id (register-callback-function function))) |
392 | (values |
e7225d0f |
393 | (callback-closure-new callback-id marshaller user-data-destroy-callback) |
e0d2987b |
394 | callback-id))) |
395 | |
457f874e |
396 | (defgeneric compute-signal-function (gobject signal function object args)) |
65670fe5 |
397 | |
457f874e |
398 | (defmethod compute-signal-function ((gobject gobject) signal function object args) |
cd9b9e8b |
399 | (declare (ignore signal)) |
e0d2987b |
400 | (cond |
457f874e |
401 | ((or (eq object t) (eq object gobject)) |
402 | (if args |
403 | #'(lambda (&rest emission-args) |
404 | (apply function (nconc emission-args args))) |
405 | function)) |
406 | (object |
407 | (if args |
408 | #'(lambda (&rest emission-args) |
409 | (apply function object (nconc (rest emission-args) args))) |
410 | #'(lambda (&rest emission-args) |
411 | (apply function object (rest emission-args))))) |
412 | (args |
413 | #'(lambda (&rest emission-args) |
414 | (apply function (nconc (rest emission-args) args)))) |
e0d2987b |
415 | (t |
457f874e |
416 | #'(lambda (&rest emission-args) |
417 | (apply function (rest emission-args)))))) |
cd9b9e8b |
418 | |
419 | (defgeneric compute-signal-id (gobject signal)) |
420 | |
421 | (defmethod compute-signal-id ((gobject gobject) signal) |
422 | (ensure-signal-id signal gobject)) |
423 | |
424 | |
457f874e |
425 | (defgeneric signal-connect (gobject signal function &key detail after object remove args)) |
cd9b9e8b |
426 | |
427 | (defmethod signal-connect :around ((gobject gobject) signal function &rest args) |
428 | (declare (ignore gobject signal args)) |
429 | (when function |
430 | (call-next-method))) |
e0d2987b |
431 | |
65670fe5 |
432 | |
e0d2987b |
433 | (defmethod signal-connect ((gobject gobject) signal function |
457f874e |
434 | &key detail after object remove args) |
e0d2987b |
435 | "Connects a callback function to a signal for a particular object. If |
436 | :OBJECT is T, the object connected to is passed as the first argument |
437 | to the callback function, or if :OBJECT is any other non NIL value, it |
438 | is passed as the first argument instead. If :AFTER is non NIL, the |
439 | handler will be called after the default handler for the signal. If |
440 | :REMOVE is non NIL, the handler will be removed after beeing invoked |
457f874e |
441 | once. ARGS is a list of additional arguments passed to the callback |
442 | function." |
cd9b9e8b |
443 | (let* ((signal-id (compute-signal-id gobject signal)) |
444 | (detail-quark (if detail (quark-intern detail) 0)) |
445 | (signal-stop-emission |
446 | #'(lambda () |
447 | (%signal-stop-emission gobject signal-id detail-quark))) |
457f874e |
448 | (callback (compute-signal-function gobject signal function object args)) |
cd9b9e8b |
449 | (wrapper #'(lambda (&rest args) |
450 | (let ((*signal-stop-emission* signal-stop-emission)) |
451 | (apply callback args))))) |
e0d2987b |
452 | (multiple-value-bind (closure-id callback-id) |
e7225d0f |
453 | (make-callback-closure wrapper signal-handler-marshal) |
e0d2987b |
454 | (let ((handler-id (%signal-connect-closure-by-id |
cd9b9e8b |
455 | gobject signal-id detail-quark closure-id after))) |
e0d2987b |
456 | (when remove |
457 | (update-user-data callback-id |
458 | #'(lambda (&rest args) |
459 | (unwind-protect |
460 | (let ((*signal-stop-emission* signal-stop-emission)) |
461 | (apply callback args)) |
e7225d0f |
462 | (when (signal-handler-is-connected-p gobject handler-id) |
463 | (signal-handler-disconnect gobject handler-id)))))) |
cd9b9e8b |
464 | handler-id)))) |
e0d2987b |
465 | |
466 | |
467 | ;;;; Signal emission |
468 | |
469 | (defbinding %signal-emitv () nil |
470 | (gvalues pointer) |
471 | (signal-id unsigned-int) |
472 | (detail quark) |
473 | (return-value gvalue)) |
474 | |
475 | (defvar *signal-emit-functions* (make-hash-table)) |
476 | |
477 | (defun create-signal-emit-function (signal-id) |
478 | (let ((info (signal-query signal-id))) |
479 | (let* ((type (type-from-number (slot-value info 'type))) |
480 | (param-types (cons type (signal-param-types info))) |
481 | (return-type (type-from-number (slot-value info 'return-type))) |
482 | (n-params (1+ (slot-value info 'n-params))) |
483 | (params (allocate-memory (* n-params +gvalue-size+)))) |
484 | #'(lambda (detail object &rest args) |
485 | (unless (= (length args) (1- n-params)) |
b4375317 |
486 | (error "Invalid number of arguments in emmision of signal ~A: ~A" signal-id (length args))) |
e0d2987b |
487 | (unwind-protect |
488 | (loop |
489 | for arg in (cons object args) |
490 | for type in param-types |
77a843ca |
491 | as tmp = params then (pointer+ tmp +gvalue-size+) |
e0d2987b |
492 | do (gvalue-init tmp type arg) |
493 | finally |
494 | (if return-type |
495 | (return |
496 | (with-gvalue (return-value) |
497 | (%signal-emitv params signal-id detail return-value))) |
498 | (%signal-emitv params signal-id detail (make-pointer 0)))) |
499 | (loop |
500 | repeat n-params |
77a843ca |
501 | as tmp = params then (pointer+ tmp +gvalue-size+) |
e0d2987b |
502 | while (gvalue-p tmp) |
503 | do (gvalue-unset tmp))))))) |
504 | |
505 | (defun signal-emit-with-detail (object signal detail &rest args) |
506 | (let* ((signal-id (ensure-signal-id signal object)) |
507 | (function (or |
508 | (gethash signal-id *signal-emit-functions*) |
509 | (setf |
510 | (gethash signal-id *signal-emit-functions*) |
511 | (create-signal-emit-function signal-id))))) |
512 | (apply function detail object args))) |
513 | |
514 | (defun signal-emit (object signal &rest args) |
515 | (apply #'signal-emit-with-detail object signal 0 args)) |
516 | |
c0f178d0 |
517 | |
457f874e |
518 | ;;;; Signal registration |
519 | |
520 | (defbinding %signal-newv (name itype flags return-type param-types) |
521 | unsigned-int |
522 | ((signal-name-to-string name) string) |
523 | (itype gtype) |
524 | (flags signal-flags) |
525 | (nil null) ; class closure |
526 | (nil null) ; accumulator |
527 | (nil null) ; accumulator data |
528 | (nil null) ; c marshaller |
529 | (return-type gtype) |
530 | ((length param-types) unsigned-int) |
531 | (param-types (vector gtype))) |
532 | |
533 | (defun signal-new (name itype flags return-type param-types) |
534 | (when (zerop (signal-lookup name itype)) |
535 | (%signal-newv name itype flags return-type param-types))) |
536 | |
fd1e4a39 |
537 | ;;;; Convenient macros |
538 | |
56ccd5b7 |
539 | (defmacro define-callback-marshal (name return-type args &key (callback-id :last)) |
540 | (let* ((ignore ()) |
541 | (params ()) |
542 | (names (loop |
543 | for arg in args |
544 | collect (if (or |
545 | (eq arg :ignore) |
546 | (and (consp arg) (eq (first arg) :ignore))) |
547 | (let ((name (gensym "IGNORE"))) |
548 | (push name ignore) |
549 | name) |
550 | (let ((name (if (atom arg) |
551 | (gensym (string arg)) |
552 | (first arg)))) |
553 | (push name params) |
554 | name)))) |
555 | (types (loop |
556 | for arg in args |
557 | collect (cond |
558 | ((eq arg :ignore) 'pointer) |
559 | ((atom arg) arg) |
560 | (t (second arg)))))) |
561 | `(define-callback ,name ,return-type |
562 | ,(ecase callback-id |
0146aef0 |
563 | (:first `((callback-id pointer-data) ,@(mapcar #'list names types))) |
564 | (:last `(,@(mapcar #'list names types) (callback-id pointer-data)))) |
56ccd5b7 |
565 | (declare (ignore ,@ignore)) |
248f4dd7 |
566 | (invoke-callback callback-id ',return-type ,@(nreverse params))))) |
fd1e4a39 |
567 | |
568 | (defmacro with-callback-function ((id function) &body body) |
569 | `(let ((,id (register-callback-function ,function))) |
570 | (unwind-protect |
571 | (progn ,@body) |
572 | (destroy-user-data ,id)))) |