112ac1d3 |
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 | |
ca5f64e9 |
23 | ;; $Id: gcallback.lisp,v 1.48 2007-10-18 10:39:32 espen Exp $ |
c8c48a4c |
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 | |
e69e2618 |
39 | (deftype user-callback () '(or function symbol)) |
40 | |
41 | (define-type-method alien-type ((type user-callback)) |
42 | (declare (ignore type)) |
43 | (alien-type 'pointer-data)) |
44 | |
45 | (define-type-method to-alien-form ((type user-callback) func &optional copy-p) |
46 | (declare (ignore type copy-p)) |
47 | `(register-callback-function ,func)) |
48 | |
49 | |
e7225d0f |
50 | ;; Callback marshaller for regular signal handlers |
51 | (define-callback signal-handler-marshal nil |
56ccd5b7 |
52 | ((gclosure gclosure) (return-value gvalue) (n-params unsigned-int) |
53 | (param-values pointer) (invocation-hint pointer) |
41932b02 |
54 | (callback-id pointer-data)) |
266ca870 |
55 | (declare (ignore gclosure invocation-hint)) |
e7225d0f |
56 | (callback-trampoline #'invoke-signal-handler callback-id n-params param-values return-value)) |
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57 | |
41932b02 |
58 | ;; Callback marshaller for class handlers |
e7225d0f |
59 | (define-callback class-handler-marshal nil |
60 | ((gclosure gclosure) (return-value gvalue) (n-params unsigned-int) |
61 | (param-values pointer) (invocation-hint pointer) |
41932b02 |
62 | (callback-id pointer-data)) |
e7225d0f |
63 | (declare (ignore gclosure invocation-hint)) |
64 | (callback-trampoline #'invoke-callback callback-id n-params param-values return-value)) |
65 | |
66 | ;; Callback marshaller for emission hooks |
67 | (define-callback emission-hook-marshal nil |
56ccd5b7 |
68 | ((invocation-hint pointer) (n-params unsigned-int) (param-values pointer) |
41932b02 |
69 | (callback-id pointer-data)) |
5de2b5f6 |
70 | (declare (ignore invocation-hint)) |
e7225d0f |
71 | (callback-trampoline #'invoke-callback callback-id n-params param-values)) |
e0d2987b |
72 | |
e7225d0f |
73 | (defun callback-trampoline (restart-wrapper callback-id n-params param-values |
74 | &optional (return-value (make-pointer 0))) |
c8c48a4c |
75 | (let* ((return-type (unless (null-pointer-p return-value) |
e378b861 |
76 | (gvalue-type return-value))) |
34f9e1d4 |
77 | (args (loop |
78 | for n from 0 below n-params |
832df308 |
79 | for offset from 0 by +gvalue-size+ |
77a843ca |
80 | collect (gvalue-peek (pointer+ param-values offset))))) |
832df308 |
81 | (unwind-protect |
e7225d0f |
82 | (multiple-value-bind (result aborted-p) |
83 | (apply restart-wrapper callback-id nil args) |
84 | (when (and return-type (not aborted-p)) |
832df308 |
85 | (gvalue-set return-value result))) |
77a843ca |
86 | ;; TODO: this should be made more general, by adding a type |
e7225d0f |
87 | ;; method to return invalidating functions. |
832df308 |
88 | (loop |
89 | for arg in args |
77a843ca |
90 | when (typep arg 'struct) |
832df308 |
91 | do (invalidate-instance arg))))) |
92 | |
e7225d0f |
93 | (defun invoke-signal-handler (callback-id return-type &rest args) |
94 | (declare (ignore return-type)) |
95 | (let* ((instance (first args)) |
96 | (handler-id (signal-handler-find instance '(:data) |
97 | 0 0 nil nil callback-id))) |
98 | (signal-handler-block instance handler-id) |
99 | (unwind-protect |
100 | (restart-case (apply #'invoke-callback callback-id nil args) |
bbb73c8a |
101 | (disconnect () :report "Disconnect and exit signal handler" |
e7225d0f |
102 | (when (signal-handler-is-connected-p instance handler-id) |
103 | (signal-handler-disconnect instance handler-id)) |
e69e2618 |
104 | (values nil t))) |
e7225d0f |
105 | (when (signal-handler-is-connected-p instance handler-id) |
e69e2618 |
106 | (signal-handler-unblock instance handler-id))))) |
34f9e1d4 |
107 | |
8755b1a5 |
108 | (defun invoke-callback (callback-id return-type &rest args) |
e7225d0f |
109 | (restart-case (apply (find-user-data callback-id) args) |
34f9e1d4 |
110 | (continue nil :report "Return from callback function" |
e7225d0f |
111 | (cond |
112 | (return-type |
113 | (format *query-io* "Enter return value of type ~S: " return-type) |
114 | (force-output *query-io*) |
115 | (eval (read *query-io*))) |
116 | (t (values nil t)))) |
34f9e1d4 |
117 | (re-invoke nil :report "Re-invoke callback function" |
e7225d0f |
118 | (apply #'invoke-callback callback-id return-type args)))) |
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119 | |
c8c48a4c |
120 | |
e378b861 |
121 | ;;;; Timeouts and idle functions |
122 | |
acd28982 |
123 | (defconstant +priority-high+ -100) |
124 | (defconstant +priority-default+ 0) |
125 | (defconstant +priority-high-idle+ 100) |
126 | (defconstant +priority-default-idle+ 200) |
127 | (defconstant +priority-low+ 300) |
128 | |
129 | (defbinding source-remove () boolean |
130 | (tag unsigned-int)) |
131 | |
bbb73c8a |
132 | (define-callback source-callback-marshal boolean ((callback-id unsigned-int)) |
133 | (invoke-source-callback callback-id)) |
134 | |
34c336c4 |
135 | (defun invoke-source-callback (callback-id &rest args) |
136 | (restart-case (apply (find-user-data callback-id) args) |
bbb73c8a |
137 | (remove () :report "Exit and remove source callback" |
138 | nil) |
139 | (continue () :report "Return from source callback" |
140 | t) |
141 | (re-invoke nil :report "Re-invoke source callback" |
34c336c4 |
142 | (apply #'invoke-source-callback callback-id args)))) |
bbb73c8a |
143 | |
e378b861 |
144 | |
145 | (defbinding (timeout-add "g_timeout_add_full") |
acd28982 |
146 | (interval function &optional (priority +priority-default+)) unsigned-int |
e378b861 |
147 | (priority int) |
148 | (interval unsigned-int) |
56ccd5b7 |
149 | (source-callback-marshal callback) |
e378b861 |
150 | ((register-callback-function function) unsigned-long) |
56ccd5b7 |
151 | (user-data-destroy-callback callback)) |
e378b861 |
152 | |
acd28982 |
153 | (defun timeout-remove (timeout) |
154 | (source-remove timeout)) |
155 | |
e378b861 |
156 | (defbinding (idle-add "g_idle_add_full") |
acd28982 |
157 | (function &optional (priority +priority-default-idle+)) unsigned-int |
e378b861 |
158 | (priority int) |
56ccd5b7 |
159 | (source-callback-marshal callback) |
e378b861 |
160 | ((register-callback-function function) unsigned-long) |
56ccd5b7 |
161 | (user-data-destroy-callback callback)) |
e378b861 |
162 | |
acd28982 |
163 | (defun idle-remove (idle) |
164 | (source-remove idle)) |
e378b861 |
165 | |
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166 | |
e0d2987b |
167 | ;;;; Signal information querying |
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168 | |
e0d2987b |
169 | (defbinding signal-lookup (name type) unsigned-int |
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170 | ((signal-name-to-string name) string) |
e0d2987b |
171 | ((find-type-number type t) type-number)) |
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172 | |
e0d2987b |
173 | (defbinding signal-name () (copy-of string) |
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174 | (signal-id unsigned-int)) |
175 | |
e0d2987b |
176 | (defbinding signal-list-ids (type) (vector unsigned-int n-ids) |
177 | ((find-type-number type t) type-number) |
178 | (n-ids unsigned-int :out)) |
179 | |
180 | (defun signal-list-names (type) |
181 | (map 'list #'signal-name (signal-list-ids type))) |
182 | |
183 | (defun ensure-signal-id-from-type (signal-id type) |
c8c48a4c |
184 | (etypecase signal-id |
e0d2987b |
185 | (integer (if (signal-name signal-id) |
186 | signal-id |
187 | (error "Invalid signal id: ~D" signal-id))) |
188 | ((or symbol string) |
189 | (let ((numeric-id (signal-lookup signal-id type))) |
190 | (if (zerop numeric-id) |
191 | (error "Invalid signal name for ~S: ~D" type signal-id) |
192 | numeric-id))))) |
193 | |
194 | (defun ensure-signal-id (signal-id instance) |
195 | (ensure-signal-id-from-type signal-id (type-of instance))) |
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196 | |
e0d2987b |
197 | (eval-when (:compile-toplevel :load-toplevel :execute) |
198 | (deftype signal-flags () |
199 | '(flags :run-first :run-last :run-cleanup :no-recurse |
200 | :detailed :action :no-hooks)) |
201 | |
e7225d0f |
202 | (define-flags-type signal-match-type |
203 | :id :detail :closure :func :data :unblocked) |
204 | |
e0d2987b |
205 | (defclass signal-query (struct) |
206 | ((id :allocation :alien :type unsigned-int) |
207 | (name :allocation :alien :type (copy-of string)) |
208 | (type :allocation :alien :type type-number) |
209 | (flags :allocation :alien :type signal-flags) |
210 | (return-type :allocation :alien :type type-number) |
211 | (n-params :allocation :alien :type unsigned-int) |
212 | (param-types :allocation :alien :type pointer)) |
213 | (:metaclass struct-class))) |
214 | |
215 | (defbinding signal-query |
216 | (signal-id &optional (signal-query (make-instance 'signal-query))) nil |
217 | (signal-id unsigned-int) |
77a843ca |
218 | (signal-query signal-query :in/return)) |
e0d2987b |
219 | |
220 | (defun signal-param-types (info) |
221 | (with-slots (n-params param-types) info |
222 | (map-c-vector 'list |
223 | #'(lambda (type-number) |
224 | (type-from-number type-number)) |
225 | param-types 'type-number n-params))) |
226 | |
227 | |
228 | (defun describe-signal (signal-id &optional type) |
229 | (let ((info (signal-query (ensure-signal-id-from-type signal-id type)))) |
230 | (with-slots (id name type flags return-type n-params) info |
457f874e |
231 | (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)) |
232 | (when flags |
233 | (format t " It has the followin invocation flags: ~{~S ~}" flags)) |
234 | (format t "~%~%Signal handlers should take ~A and return ~A~%" |
e0d2987b |
235 | (if (zerop n-params) |
236 | "no arguments" |
237 | (format nil "arguments with the following types: ~A" |
457f874e |
238 | (signal-param-types info))) |
239 | (cond |
240 | ((= return-type (find-type-number "void")) "no values") |
241 | ((not (type-from-number return-type)) "values of unknown type") |
242 | ((format nil "values of type ~S" (type-from-number return-type)))))))) |
e0d2987b |
243 | |
244 | |
245 | ;;;; Signal connecting and controlling |
246 | |
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247 | (define-flags-type connect-flags :after :swapped) |
248 | |
9944c385 |
249 | (defvar *overridden-signals* (make-hash-table :test 'equalp)) |
250 | |
251 | (defbinding %signal-override-class-closure () nil |
252 | (signal-id unsigned-int) |
253 | (type-number type-number) |
254 | (callback-closure pointer)) |
255 | |
256 | |
257 | (defun signal-override-class-closure (name type function) |
258 | (let* ((signal-id (ensure-signal-id-from-type name type)) |
259 | (type-number (find-type-number type t)) |
260 | (callback-id (gethash (cons type-number signal-id) *overridden-signals*))) |
261 | (if callback-id |
262 | (update-user-data callback-id function) |
263 | (multiple-value-bind (callback-closure callback-id) |
e7225d0f |
264 | (make-callback-closure function class-handler-marshal) |
9944c385 |
265 | (%signal-override-class-closure signal-id type-number callback-closure) |
266 | (setf |
267 | (gethash (cons type-number signal-id) *overridden-signals*) |
268 | callback-id))))) |
269 | |
270 | |
271 | (defbinding %signal-chain-from-overridden () nil |
272 | (args pointer) |
273 | (return-value (or null gvalue))) |
274 | |
38049b1a |
275 | |
276 | (defun %call-next-handler (n-params types args return-type) |
9944c385 |
277 | (let ((params (allocate-memory (* n-params +gvalue-size+)))) |
278 | (loop |
38049b1a |
279 | for arg in args |
9944c385 |
280 | for type in types |
281 | for offset from 0 by +gvalue-size+ |
77a843ca |
282 | do (gvalue-init (pointer+ params offset) type arg)) |
9944c385 |
283 | |
284 | (unwind-protect |
285 | (if return-type |
286 | (with-gvalue (return-value return-type) |
287 | (%signal-chain-from-overridden params return-value)) |
288 | (%signal-chain-from-overridden params nil)) |
289 | (progn |
290 | (loop |
291 | repeat n-params |
292 | for offset from 0 by +gvalue-size+ |
77a843ca |
293 | do (gvalue-unset (pointer+ params offset))) |
9944c385 |
294 | (deallocate-memory params))))) |
295 | |
296 | |
297 | (defmacro define-signal-handler (name ((object class) &rest args) &body body) |
298 | (let* ((info (signal-query (ensure-signal-id-from-type name class))) |
299 | (types (cons class (signal-param-types info))) |
300 | (n-params (1+ (slot-value info 'n-params))) |
301 | (return-type (type-from-number (slot-value info 'return-type))) |
302 | (vars (loop |
303 | for arg in args |
304 | until (eq arg '&rest) |
305 | collect arg)) |
306 | (rest (cadr (member '&rest args))) |
38049b1a |
307 | (next (make-symbol "ARGS")) |
308 | (default (make-symbol "DEFAULT"))) |
9944c385 |
309 | |
310 | `(progn |
311 | (signal-override-class-closure ',name ',class |
312 | #'(lambda (,object ,@args) |
38049b1a |
313 | (let ((,default (list* ,object ,@vars ,rest))) |
314 | (flet ((call-next-handler (&rest ,next) |
9944c385 |
315 | (%call-next-handler |
e1fcda22 |
316 | ,n-params ',types (or ,next ,default) ',return-type))) |
317 | ,@body)))) |
9944c385 |
318 | ',name))) |
319 | |
320 | |
e0d2987b |
321 | (defbinding %signal-stop-emission () nil |
c8c48a4c |
322 | (instance ginstance) |
e0d2987b |
323 | (signal-id unsigned-int) |
324 | (detail quark)) |
325 | |
326 | (defvar *signal-stop-emission* nil) |
327 | (declaim (special *signal-stop-emission*)) |
c8c48a4c |
328 | |
e0d2987b |
329 | (defun signal-stop-emission () |
330 | (if *signal-stop-emission* |
331 | (funcall *signal-stop-emission*) |
332 | (error "Not inside a signal handler"))) |
333 | |
334 | |
335 | (defbinding signal-add-emission-hook (type signal function &key (detail 0)) |
e7225d0f |
336 | unsigned-long |
e0d2987b |
337 | ((ensure-signal-id-from-type signal type) unsigned-int) |
338 | (detail quark) |
e7225d0f |
339 | (emission-hook-marshal callback) |
e0d2987b |
340 | ((register-callback-function function) unsigned-int) |
56ccd5b7 |
341 | (user-data-destroy-callback callback)) |
e0d2987b |
342 | |
343 | (defbinding signal-remove-emission-hook (type signal hook-id) nil |
344 | ((ensure-signal-id-from-type signal type) unsigned-int) |
e7225d0f |
345 | (hook-id unsigned-long)) |
c8c48a4c |
346 | |
c8c48a4c |
347 | |
0383dd48 |
348 | (defbinding (signal-has-handler-pending-p "g_signal_has_handler_pending") |
c8c48a4c |
349 | (instance signal-id &key detail blocked) boolean |
350 | (instance ginstance) |
e49e135a |
351 | ((ensure-signal-id signal-id instance) unsigned-int) |
c8c48a4c |
352 | ((or detail 0) quark) |
73572c12 |
353 | (blocked boolean)) |
c8c48a4c |
354 | |
e7225d0f |
355 | (defbinding %signal-connect-closure-by-id () unsigned-long |
c8c48a4c |
356 | (instance ginstance) |
e0d2987b |
357 | (signal-id unsigned-int) |
358 | (detail quark) |
359 | (closure pointer) |
c8c48a4c |
360 | (after boolean)) |
361 | |
0383dd48 |
362 | (defbinding signal-handler-block () nil |
c8c48a4c |
363 | (instance ginstance) |
e7225d0f |
364 | (handler-id unsigned-long)) |
c8c48a4c |
365 | |
0383dd48 |
366 | (defbinding signal-handler-unblock () nil |
c8c48a4c |
367 | (instance ginstance) |
e7225d0f |
368 | (handler-id unsigned-long)) |
369 | |
370 | ;; Internal |
371 | (defbinding signal-handler-find () unsigned-long |
372 | (instance gobject) |
373 | (mask signal-match-type) |
374 | (signal-id unsigned-int) |
375 | (detail quark) |
376 | (closure (or null pointer)) |
377 | (func (or null pointer)) |
b7c49e0c |
378 | (data pointer-data)) |
c8c48a4c |
379 | |
0383dd48 |
380 | (defbinding signal-handler-disconnect () nil |
c8c48a4c |
381 | (instance ginstance) |
e7225d0f |
382 | (handler-id unsigned-long)) |
e0d2987b |
383 | |
384 | (defbinding signal-handler-is-connected-p () boolean |
385 | (instance ginstance) |
e7225d0f |
386 | (handler-id unsigned-long)) |
c8c48a4c |
387 | |
d4f4418a |
388 | (defbinding (closure-new "g_cclosure_new") () gclosure |
389 | ((make-pointer #xFFFFFFFF) pointer) |
e0d2987b |
390 | (callback-id unsigned-int) |
56ccd5b7 |
391 | (destroy-notify callback)) |
c8c48a4c |
392 | |
d4f4418a |
393 | (defbinding closure-set-meta-marshal () nil |
394 | (gclosure gclosure) |
395 | (callback-id unsigned-int) |
396 | (callback callback)) |
397 | |
398 | (defun callback-closure-new (callback-id callback destroy-notify) |
399 | (let ((gclosure (closure-new callback-id destroy-notify))) |
400 | (closure-set-meta-marshal gclosure callback-id callback) |
401 | gclosure)) |
402 | |
b7c49e0c |
403 | (defun make-callback-closure (function &optional (marshaller signal-handler-marshal)) |
e0d2987b |
404 | (let ((callback-id (register-callback-function function))) |
405 | (values |
e7225d0f |
406 | (callback-closure-new callback-id marshaller user-data-destroy-callback) |
e0d2987b |
407 | callback-id))) |
408 | |
457f874e |
409 | (defgeneric compute-signal-function (gobject signal function object args)) |
65670fe5 |
410 | |
457f874e |
411 | (defmethod compute-signal-function ((gobject gobject) signal function object args) |
cd9b9e8b |
412 | (declare (ignore signal)) |
e0d2987b |
413 | (cond |
457f874e |
414 | ((or (eq object t) (eq object gobject)) |
415 | (if args |
416 | #'(lambda (&rest emission-args) |
417 | (apply function (nconc emission-args args))) |
418 | function)) |
419 | (object |
420 | (if args |
421 | #'(lambda (&rest emission-args) |
422 | (apply function object (nconc (rest emission-args) args))) |
423 | #'(lambda (&rest emission-args) |
424 | (apply function object (rest emission-args))))) |
425 | (args |
426 | #'(lambda (&rest emission-args) |
427 | (apply function (nconc (rest emission-args) args)))) |
e0d2987b |
428 | (t |
457f874e |
429 | #'(lambda (&rest emission-args) |
430 | (apply function (rest emission-args)))))) |
cd9b9e8b |
431 | |
432 | (defgeneric compute-signal-id (gobject signal)) |
433 | |
434 | (defmethod compute-signal-id ((gobject gobject) signal) |
435 | (ensure-signal-id signal gobject)) |
436 | |
437 | |
457f874e |
438 | (defgeneric signal-connect (gobject signal function &key detail after object remove args)) |
cd9b9e8b |
439 | |
440 | (defmethod signal-connect :around ((gobject gobject) signal function &rest args) |
441 | (declare (ignore gobject signal args)) |
442 | (when function |
443 | (call-next-method))) |
e0d2987b |
444 | |
65670fe5 |
445 | |
e0d2987b |
446 | (defmethod signal-connect ((gobject gobject) signal function |
457f874e |
447 | &key detail after object remove args) |
e0d2987b |
448 | "Connects a callback function to a signal for a particular object. If |
449 | :OBJECT is T, the object connected to is passed as the first argument |
450 | to the callback function, or if :OBJECT is any other non NIL value, it |
451 | is passed as the first argument instead. If :AFTER is non NIL, the |
452 | handler will be called after the default handler for the signal. If |
453 | :REMOVE is non NIL, the handler will be removed after beeing invoked |
457f874e |
454 | once. ARGS is a list of additional arguments passed to the callback |
455 | function." |
cd9b9e8b |
456 | (let* ((signal-id (compute-signal-id gobject signal)) |
457 | (detail-quark (if detail (quark-intern detail) 0)) |
458 | (signal-stop-emission |
459 | #'(lambda () |
460 | (%signal-stop-emission gobject signal-id detail-quark))) |
457f874e |
461 | (callback (compute-signal-function gobject signal function object args)) |
cd9b9e8b |
462 | (wrapper #'(lambda (&rest args) |
463 | (let ((*signal-stop-emission* signal-stop-emission)) |
464 | (apply callback args))))) |
e0d2987b |
465 | (multiple-value-bind (closure-id callback-id) |
e7225d0f |
466 | (make-callback-closure wrapper signal-handler-marshal) |
e0d2987b |
467 | (let ((handler-id (%signal-connect-closure-by-id |
cd9b9e8b |
468 | gobject signal-id detail-quark closure-id after))) |
e0d2987b |
469 | (when remove |
470 | (update-user-data callback-id |
471 | #'(lambda (&rest args) |
472 | (unwind-protect |
473 | (let ((*signal-stop-emission* signal-stop-emission)) |
474 | (apply callback args)) |
e7225d0f |
475 | (when (signal-handler-is-connected-p gobject handler-id) |
476 | (signal-handler-disconnect gobject handler-id)))))) |
cd9b9e8b |
477 | handler-id)))) |
e0d2987b |
478 | |
479 | |
480 | ;;;; Signal emission |
481 | |
482 | (defbinding %signal-emitv () nil |
483 | (gvalues pointer) |
484 | (signal-id unsigned-int) |
485 | (detail quark) |
486 | (return-value gvalue)) |
487 | |
488 | (defvar *signal-emit-functions* (make-hash-table)) |
489 | |
490 | (defun create-signal-emit-function (signal-id) |
491 | (let ((info (signal-query signal-id))) |
492 | (let* ((type (type-from-number (slot-value info 'type))) |
493 | (param-types (cons type (signal-param-types info))) |
494 | (return-type (type-from-number (slot-value info 'return-type))) |
495 | (n-params (1+ (slot-value info 'n-params))) |
496 | (params (allocate-memory (* n-params +gvalue-size+)))) |
497 | #'(lambda (detail object &rest args) |
498 | (unless (= (length args) (1- n-params)) |
b4375317 |
499 | (error "Invalid number of arguments in emmision of signal ~A: ~A" signal-id (length args))) |
e0d2987b |
500 | (unwind-protect |
501 | (loop |
502 | for arg in (cons object args) |
503 | for type in param-types |
77a843ca |
504 | as tmp = params then (pointer+ tmp +gvalue-size+) |
e0d2987b |
505 | do (gvalue-init tmp type arg) |
506 | finally |
507 | (if return-type |
508 | (return |
ca5f64e9 |
509 | (with-gvalue (return-value return-type) |
e0d2987b |
510 | (%signal-emitv params signal-id detail return-value))) |
511 | (%signal-emitv params signal-id detail (make-pointer 0)))) |
512 | (loop |
513 | repeat n-params |
77a843ca |
514 | as tmp = params then (pointer+ tmp +gvalue-size+) |
e0d2987b |
515 | while (gvalue-p tmp) |
516 | do (gvalue-unset tmp))))))) |
517 | |
518 | (defun signal-emit-with-detail (object signal detail &rest args) |
519 | (let* ((signal-id (ensure-signal-id signal object)) |
520 | (function (or |
521 | (gethash signal-id *signal-emit-functions*) |
522 | (setf |
523 | (gethash signal-id *signal-emit-functions*) |
524 | (create-signal-emit-function signal-id))))) |
525 | (apply function detail object args))) |
526 | |
527 | (defun signal-emit (object signal &rest args) |
528 | (apply #'signal-emit-with-detail object signal 0 args)) |
529 | |
c0f178d0 |
530 | |
457f874e |
531 | ;;;; Signal registration |
532 | |
533 | (defbinding %signal-newv (name itype flags return-type param-types) |
534 | unsigned-int |
535 | ((signal-name-to-string name) string) |
536 | (itype gtype) |
537 | (flags signal-flags) |
538 | (nil null) ; class closure |
539 | (nil null) ; accumulator |
540 | (nil null) ; accumulator data |
541 | (nil null) ; c marshaller |
542 | (return-type gtype) |
543 | ((length param-types) unsigned-int) |
544 | (param-types (vector gtype))) |
545 | |
546 | (defun signal-new (name itype flags return-type param-types) |
547 | (when (zerop (signal-lookup name itype)) |
548 | (%signal-newv name itype flags return-type param-types))) |
549 | |
fd1e4a39 |
550 | ;;;; Convenient macros |
551 | |
56ccd5b7 |
552 | (defmacro define-callback-marshal (name return-type args &key (callback-id :last)) |
553 | (let* ((ignore ()) |
554 | (params ()) |
555 | (names (loop |
556 | for arg in args |
557 | collect (if (or |
558 | (eq arg :ignore) |
559 | (and (consp arg) (eq (first arg) :ignore))) |
560 | (let ((name (gensym "IGNORE"))) |
561 | (push name ignore) |
562 | name) |
563 | (let ((name (if (atom arg) |
564 | (gensym (string arg)) |
565 | (first arg)))) |
566 | (push name params) |
567 | name)))) |
568 | (types (loop |
569 | for arg in args |
570 | collect (cond |
571 | ((eq arg :ignore) 'pointer) |
572 | ((atom arg) arg) |
573 | (t (second arg)))))) |
574 | `(define-callback ,name ,return-type |
575 | ,(ecase callback-id |
0146aef0 |
576 | (:first `((callback-id pointer-data) ,@(mapcar #'list names types))) |
577 | (:last `(,@(mapcar #'list names types) (callback-id pointer-data)))) |
56ccd5b7 |
578 | (declare (ignore ,@ignore)) |
248f4dd7 |
579 | (invoke-callback callback-id ',return-type ,@(nreverse params))))) |
fd1e4a39 |
580 | |
581 | (defmacro with-callback-function ((id function) &body body) |
582 | `(let ((,id (register-callback-function ,function))) |
583 | (unwind-protect |
584 | (progn ,@body) |
585 | (destroy-user-data ,id)))) |