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5e046f6d JB |
1 | ;;; timer.el --- run a function with args at some time in future |
2 | ||
ceb4c4d3 TTN |
3 | ;; Copyright (C) 1996, 2002, 2003, 2004, 2005, |
4 | ;; 2006 Free Software Foundation, Inc. | |
5e046f6d JB |
5 | |
6 | ;; Maintainer: FSF | |
7 | ||
8 | ;; This file is part of GNU Emacs. | |
9 | ||
10 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
11 | ;; it under the terms of the GNU General Public License as published by | |
12 | ;; the Free Software Foundation; either version 2, or (at your option) | |
13 | ;; any later version. | |
14 | ||
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
21 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
3a35cf56 LK |
22 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
23 | ;; Boston, MA 02110-1301, USA. | |
5e046f6d JB |
24 | |
25 | ;;; Commentary: | |
26 | ||
27 | ;; This package gives you the capability to run Emacs Lisp commands at | |
28 | ;; specified times in the future, either as one-shots or periodically. | |
29 | ||
30 | ;;; Code: | |
31 | ||
32 | ;; Layout of a timer vector: | |
33 | ;; [triggered-p high-seconds low-seconds usecs repeat-delay | |
34 | ;; function args idle-delay] | |
35 | ||
36 | (defun timer-create () | |
37 | "Create a timer object." | |
38 | (let ((timer (make-vector 8 nil))) | |
39 | (aset timer 0 t) | |
40 | timer)) | |
41 | ||
42 | (defun timerp (object) | |
43 | "Return t if OBJECT is a timer." | |
44 | (and (vectorp object) (= (length object) 8))) | |
45 | ||
46 | (defun timer-set-time (timer time &optional delta) | |
47 | "Set the trigger time of TIMER to TIME. | |
48 | TIME must be in the internal format returned by, e.g., `current-time'. | |
49 | If optional third argument DELTA is a positive number, make the timer | |
50 | fire repeatedly that many seconds apart." | |
51 | (or (timerp timer) | |
52 | (error "Invalid timer")) | |
53 | (aset timer 1 (car time)) | |
54 | (aset timer 2 (if (consp (cdr time)) (car (cdr time)) (cdr time))) | |
55 | (aset timer 3 (or (and (consp (cdr time)) (consp (cdr (cdr time))) | |
56 | (nth 2 time)) | |
57 | 0)) | |
58 | (aset timer 4 (and (numberp delta) (> delta 0) delta)) | |
59 | timer) | |
60 | ||
61 | (defun timer-set-idle-time (timer secs &optional repeat) | |
62 | "Set the trigger idle time of TIMER to SECS. | |
63 | If optional third argument REPEAT is non-nil, make the timer | |
64 | fire each time Emacs is idle for that many seconds." | |
65 | (or (timerp timer) | |
66 | (error "Invalid timer")) | |
67 | (aset timer 1 0) | |
68 | (aset timer 2 0) | |
69 | (aset timer 3 0) | |
70 | (timer-inc-time timer secs) | |
71 | (aset timer 4 repeat) | |
72 | timer) | |
73 | ||
74 | (defun timer-next-integral-multiple-of-time (time secs) | |
75 | "Yield the next value after TIME that is an integral multiple of SECS. | |
76 | More precisely, the next value, after TIME, that is an integral multiple | |
77 | of SECS seconds since the epoch. SECS may be a fraction." | |
78 | (let ((time-base (ash 1 16))) | |
79 | (if (fboundp 'atan) | |
80 | ;; Use floating point, taking care to not lose precision. | |
81 | (let* ((float-time-base (float time-base)) | |
82 | (million 1000000.0) | |
83 | (time-usec (+ (* million | |
84 | (+ (* float-time-base (nth 0 time)) | |
85 | (nth 1 time))) | |
86 | (nth 2 time))) | |
87 | (secs-usec (* million secs)) | |
88 | (mod-usec (mod time-usec secs-usec)) | |
89 | (next-usec (+ (- time-usec mod-usec) secs-usec)) | |
90 | (time-base-million (* float-time-base million))) | |
91 | (list (floor next-usec time-base-million) | |
92 | (floor (mod next-usec time-base-million) million) | |
93 | (floor (mod next-usec million)))) | |
94 | ;; Floating point is not supported. | |
95 | ;; Use integer arithmetic, avoiding overflow if possible. | |
96 | (let* ((mod-sec (mod (+ (* (mod time-base secs) | |
97 | (mod (nth 0 time) secs)) | |
98 | (nth 1 time)) | |
99 | secs)) | |
100 | (next-1-sec (+ (- (nth 1 time) mod-sec) secs))) | |
101 | (list (+ (nth 0 time) (floor next-1-sec time-base)) | |
102 | (mod next-1-sec time-base) | |
103 | 0))))) | |
104 | ||
105 | (defun timer-relative-time (time secs &optional usecs) | |
106 | "Advance TIME by SECS seconds and optionally USECS microseconds. | |
107 | SECS may be a fraction." | |
108 | (let ((high (car time)) | |
109 | (low (if (consp (cdr time)) (nth 1 time) (cdr time))) | |
110 | (micro (if (numberp (car-safe (cdr-safe (cdr time)))) | |
111 | (nth 2 time) | |
112 | 0))) | |
113 | ;; Add | |
114 | (if usecs (setq micro (+ micro usecs))) | |
115 | (if (floatp secs) | |
116 | (setq micro (+ micro (floor (* 1000000 (- secs (floor secs))))))) | |
117 | (setq low (+ low (floor secs))) | |
118 | ||
119 | ;; Normalize | |
120 | ;; `/' rounds towards zero while `mod' returns a positive number, | |
121 | ;; so we can't rely on (= a (+ (* 100 (/ a 100)) (mod a 100))). | |
122 | (setq low (+ low (/ micro 1000000) (if (< micro 0) -1 0))) | |
123 | (setq micro (mod micro 1000000)) | |
124 | (setq high (+ high (/ low 65536) (if (< low 0) -1 0))) | |
125 | (setq low (logand low 65535)) | |
126 | ||
127 | (list high low (and (/= micro 0) micro)))) | |
128 | ||
129 | (defun timer-inc-time (timer secs &optional usecs) | |
130 | "Increment the time set in TIMER by SECS seconds and USECS microseconds. | |
131 | SECS may be a fraction. If USECS is omitted, that means it is zero." | |
132 | (let ((time (timer-relative-time | |
133 | (list (aref timer 1) (aref timer 2) (aref timer 3)) | |
134 | secs | |
135 | usecs))) | |
136 | (aset timer 1 (nth 0 time)) | |
137 | (aset timer 2 (nth 1 time)) | |
138 | (aset timer 3 (or (nth 2 time) 0)))) | |
139 | ||
140 | (defun timer-set-time-with-usecs (timer time usecs &optional delta) | |
141 | "Set the trigger time of TIMER to TIME plus USECS. | |
142 | TIME must be in the internal format returned by, e.g., `current-time'. | |
143 | The microsecond count from TIME is ignored, and USECS is used instead. | |
144 | If optional fourth argument DELTA is a positive number, make the timer | |
145 | fire repeatedly that many seconds apart." | |
146 | (or (timerp timer) | |
147 | (error "Invalid timer")) | |
148 | (aset timer 1 (nth 0 time)) | |
149 | (aset timer 2 (nth 1 time)) | |
150 | (aset timer 3 usecs) | |
151 | (aset timer 4 (and (numberp delta) (> delta 0) delta)) | |
152 | timer) | |
153 | (make-obsolete 'timer-set-time-with-usecs | |
154 | "use `timer-set-time' and `timer-inc-time' instead." | |
bf247b6e | 155 | "22.1") |
5e046f6d JB |
156 | |
157 | (defun timer-set-function (timer function &optional args) | |
158 | "Make TIMER call FUNCTION with optional ARGS when triggering." | |
159 | (or (timerp timer) | |
160 | (error "Invalid timer")) | |
161 | (aset timer 5 function) | |
162 | (aset timer 6 args) | |
163 | timer) | |
164 | \f | |
dbbee529 RS |
165 | (defun timer-activate (timer &optional triggered-p reuse-cell) |
166 | "Put TIMER on the list of active timers. | |
167 | ||
168 | REUSE-CELL, if non-nil, is a cons cell to reuse instead | |
169 | of allocating a new one." | |
5e046f6d JB |
170 | (if (and (timerp timer) |
171 | (integerp (aref timer 1)) | |
172 | (integerp (aref timer 2)) | |
173 | (integerp (aref timer 3)) | |
174 | (aref timer 5)) | |
175 | (let ((timers timer-list) | |
176 | last) | |
177 | ;; Skip all timers to trigger before the new one. | |
178 | (while (and timers | |
179 | (or (> (aref timer 1) (aref (car timers) 1)) | |
180 | (and (= (aref timer 1) (aref (car timers) 1)) | |
181 | (> (aref timer 2) (aref (car timers) 2))) | |
182 | (and (= (aref timer 1) (aref (car timers) 1)) | |
183 | (= (aref timer 2) (aref (car timers) 2)) | |
184 | (> (aref timer 3) (aref (car timers) 3))))) | |
185 | (setq last timers | |
186 | timers (cdr timers))) | |
dbbee529 RS |
187 | (if reuse-cell |
188 | (progn | |
189 | (setcar reuse-cell timer) | |
190 | (setcdr reuse-cell timers)) | |
191 | (setq reuse-cell (cons timer timers))) | |
5e046f6d JB |
192 | ;; Insert new timer after last which possibly means in front of queue. |
193 | (if last | |
dbbee529 RS |
194 | (setcdr last reuse-cell) |
195 | (setq timer-list reuse-cell)) | |
6160f933 | 196 | (aset timer 0 triggered-p) |
5e046f6d JB |
197 | (aset timer 7 nil) |
198 | nil) | |
199 | (error "Invalid or uninitialized timer"))) | |
200 | ||
dbbee529 | 201 | (defun timer-activate-when-idle (timer &optional dont-wait reuse-cell) |
5e046f6d JB |
202 | "Arrange to activate TIMER whenever Emacs is next idle. |
203 | If optional argument DONT-WAIT is non-nil, then enable the | |
204 | timer to activate immediately, or at the right time, if Emacs | |
dbbee529 RS |
205 | is already idle. |
206 | ||
207 | REUSE-CELL, if non-nil, is a cons cell to reuse instead | |
208 | of allocating a new one." | |
5e046f6d JB |
209 | (if (and (timerp timer) |
210 | (integerp (aref timer 1)) | |
211 | (integerp (aref timer 2)) | |
212 | (integerp (aref timer 3)) | |
213 | (aref timer 5)) | |
214 | (let ((timers timer-idle-list) | |
215 | last) | |
216 | ;; Skip all timers to trigger before the new one. | |
217 | (while (and timers | |
218 | (or (> (aref timer 1) (aref (car timers) 1)) | |
219 | (and (= (aref timer 1) (aref (car timers) 1)) | |
220 | (> (aref timer 2) (aref (car timers) 2))) | |
221 | (and (= (aref timer 1) (aref (car timers) 1)) | |
222 | (= (aref timer 2) (aref (car timers) 2)) | |
223 | (> (aref timer 3) (aref (car timers) 3))))) | |
224 | (setq last timers | |
225 | timers (cdr timers))) | |
dbbee529 RS |
226 | (if reuse-cell |
227 | (progn | |
228 | (setcar reuse-cell timer) | |
229 | (setcdr reuse-cell timers)) | |
230 | (setq reuse-cell (cons timer timers))) | |
5e046f6d JB |
231 | ;; Insert new timer after last which possibly means in front of queue. |
232 | (if last | |
dbbee529 RS |
233 | (setcdr last reuse-cell) |
234 | (setq timer-idle-list reuse-cell)) | |
5e046f6d JB |
235 | (aset timer 0 (not dont-wait)) |
236 | (aset timer 7 t) | |
237 | nil) | |
238 | (error "Invalid or uninitialized timer"))) | |
239 | ||
240 | ;;;###autoload | |
241 | (defalias 'disable-timeout 'cancel-timer) | |
242 | ;;;###autoload | |
243 | (defun cancel-timer (timer) | |
244 | "Remove TIMER from the list of active timers." | |
245 | (or (timerp timer) | |
246 | (error "Invalid timer")) | |
247 | (setq timer-list (delq timer timer-list)) | |
248 | (setq timer-idle-list (delq timer timer-idle-list)) | |
249 | nil) | |
250 | ||
dbbee529 RS |
251 | ;; Remove TIMER from the list of active timers or idle timers. |
252 | ;; Only to be used in this file. It returns the cons cell | |
253 | ;; that was removed from the list. | |
254 | (defun cancel-timer-internal (timer) | |
255 | (let ((cell1 (memq timer timer-list)) | |
256 | (cell2 (memq timer timer-idle-list))) | |
257 | (if cell1 | |
258 | (setq timer-list (delq timer timer-list))) | |
259 | (if cell2 | |
260 | (setq timer-idle-list (delq timer timer-idle-list))) | |
261 | (or cell1 cell2))) | |
262 | ||
5e046f6d JB |
263 | ;;;###autoload |
264 | (defun cancel-function-timers (function) | |
265 | "Cancel all timers scheduled by `run-at-time' which would run FUNCTION." | |
266 | (interactive "aCancel timers of function: ") | |
267 | (let ((tail timer-list)) | |
268 | (while tail | |
269 | (if (eq (aref (car tail) 5) function) | |
270 | (setq timer-list (delq (car tail) timer-list))) | |
271 | (setq tail (cdr tail)))) | |
272 | (let ((tail timer-idle-list)) | |
273 | (while tail | |
274 | (if (eq (aref (car tail) 5) function) | |
275 | (setq timer-idle-list (delq (car tail) timer-idle-list))) | |
276 | (setq tail (cdr tail))))) | |
277 | \f | |
278 | ;; Record the last few events, for debugging. | |
279 | (defvar timer-event-last-2 nil) | |
280 | (defvar timer-event-last-1 nil) | |
281 | (defvar timer-event-last nil) | |
282 | ||
283 | (defvar timer-max-repeats 10 | |
284 | "*Maximum number of times to repeat a timer, if real time jumps.") | |
285 | ||
286 | (defun timer-until (timer time) | |
287 | "Calculate number of seconds from when TIMER will run, until TIME. | |
288 | TIMER is a timer, and stands for the time when its next repeat is scheduled. | |
289 | TIME is a time-list." | |
290 | (let ((high (- (car time) (aref timer 1))) | |
291 | (low (- (nth 1 time) (aref timer 2)))) | |
292 | (+ low (* high 65536)))) | |
293 | ||
294 | (defun timer-event-handler (timer) | |
295 | "Call the handler for the timer TIMER. | |
296 | This function is called, by name, directly by the C code." | |
297 | (setq timer-event-last-2 timer-event-last-1) | |
298 | (setq timer-event-last-1 timer-event-last) | |
299 | (setq timer-event-last timer) | |
300 | (let ((inhibit-quit t)) | |
301 | (if (timerp timer) | |
dbbee529 RS |
302 | (let (retrigger cell) |
303 | ;; Delete from queue. Record the cons cell that was used. | |
304 | (setq cell (cancel-timer-internal timer)) | |
5e046f6d JB |
305 | ;; Re-schedule if requested. |
306 | (if (aref timer 4) | |
307 | (if (aref timer 7) | |
dbbee529 | 308 | (timer-activate-when-idle timer nil cell) |
5e046f6d JB |
309 | (timer-inc-time timer (aref timer 4) 0) |
310 | ;; If real time has jumped forward, | |
311 | ;; perhaps because Emacs was suspended for a long time, | |
312 | ;; limit how many times things get repeated. | |
313 | (if (and (numberp timer-max-repeats) | |
314 | (< 0 (timer-until timer (current-time)))) | |
315 | (let ((repeats (/ (timer-until timer (current-time)) | |
316 | (aref timer 4)))) | |
317 | (if (> repeats timer-max-repeats) | |
318 | (timer-inc-time timer (* (aref timer 4) repeats))))) | |
dbbee529 | 319 | (timer-activate timer t cell) |
6160f933 | 320 | (setq retrigger t))) |
5e046f6d JB |
321 | ;; Run handler. |
322 | ;; We do this after rescheduling so that the handler function | |
323 | ;; can cancel its own timer successfully with cancel-timer. | |
324 | (condition-case nil | |
325 | (apply (aref timer 5) (aref timer 6)) | |
6160f933 KS |
326 | (error nil)) |
327 | (if retrigger | |
8cb7feb8 | 328 | (aset timer 0 nil))) |
5e046f6d JB |
329 | (error "Bogus timer event")))) |
330 | ||
331 | ;; This function is incompatible with the one in levents.el. | |
332 | (defun timeout-event-p (event) | |
333 | "Non-nil if EVENT is a timeout event." | |
334 | (and (listp event) (eq (car event) 'timer-event))) | |
335 | \f | |
336 | ;;;###autoload | |
337 | (defun run-at-time (time repeat function &rest args) | |
338 | "Perform an action at time TIME. | |
339 | Repeat the action every REPEAT seconds, if REPEAT is non-nil. | |
340 | TIME should be a string like \"11:23pm\", nil meaning now, a number of seconds | |
341 | from now, a value from `current-time', or t (with non-nil REPEAT) | |
342 | meaning the next integral multiple of REPEAT. | |
343 | REPEAT may be an integer or floating point number. | |
344 | The action is to call FUNCTION with arguments ARGS. | |
345 | ||
346 | This function returns a timer object which you can use in `cancel-timer'." | |
347 | (interactive "sRun at time: \nNRepeat interval: \naFunction: ") | |
348 | ||
349 | (or (null repeat) | |
350 | (and (numberp repeat) (< 0 repeat)) | |
351 | (error "Invalid repetition interval")) | |
352 | ||
353 | ;; Special case: nil means "now" and is useful when repeating. | |
354 | (if (null time) | |
355 | (setq time (current-time))) | |
356 | ||
357 | ;; Special case: t means the next integral multiple of REPEAT. | |
358 | (if (and (eq time t) repeat) | |
359 | (setq time (timer-next-integral-multiple-of-time (current-time) repeat))) | |
360 | ||
361 | ;; Handle numbers as relative times in seconds. | |
362 | (if (numberp time) | |
363 | (setq time (timer-relative-time (current-time) time))) | |
364 | ||
365 | ;; Handle relative times like "2 hours and 35 minutes" | |
366 | (if (stringp time) | |
367 | (let ((secs (timer-duration time))) | |
368 | (if secs | |
369 | (setq time (timer-relative-time (current-time) secs))))) | |
370 | ||
371 | ;; Handle "11:23pm" and the like. Interpret it as meaning today | |
372 | ;; which admittedly is rather stupid if we have passed that time | |
373 | ;; already. (Though only Emacs hackers hack Emacs at that time.) | |
374 | (if (stringp time) | |
375 | (progn | |
376 | (require 'diary-lib) | |
377 | (let ((hhmm (diary-entry-time time)) | |
378 | (now (decode-time))) | |
379 | (if (>= hhmm 0) | |
380 | (setq time | |
381 | (encode-time 0 (% hhmm 100) (/ hhmm 100) (nth 3 now) | |
382 | (nth 4 now) (nth 5 now) (nth 8 now))))))) | |
383 | ||
384 | (or (consp time) | |
385 | (error "Invalid time format")) | |
386 | ||
387 | (let ((timer (timer-create))) | |
388 | (timer-set-time timer time repeat) | |
389 | (timer-set-function timer function args) | |
390 | (timer-activate timer) | |
391 | timer)) | |
392 | ||
393 | ;;;###autoload | |
394 | (defun run-with-timer (secs repeat function &rest args) | |
395 | "Perform an action after a delay of SECS seconds. | |
396 | Repeat the action every REPEAT seconds, if REPEAT is non-nil. | |
397 | SECS and REPEAT may be integers or floating point numbers. | |
398 | The action is to call FUNCTION with arguments ARGS. | |
399 | ||
400 | This function returns a timer object which you can use in `cancel-timer'." | |
401 | (interactive "sRun after delay (seconds): \nNRepeat interval: \naFunction: ") | |
402 | (apply 'run-at-time secs repeat function args)) | |
403 | ||
404 | ;;;###autoload | |
405 | (defun add-timeout (secs function object &optional repeat) | |
406 | "Add a timer to run SECS seconds from now, to call FUNCTION on OBJECT. | |
407 | If REPEAT is non-nil, repeat the timer every REPEAT seconds. | |
408 | This function is for compatibility; see also `run-with-timer'." | |
409 | (run-with-timer secs repeat function object)) | |
410 | ||
411 | ;;;###autoload | |
412 | (defun run-with-idle-timer (secs repeat function &rest args) | |
413 | "Perform an action the next time Emacs is idle for SECS seconds. | |
414 | The action is to call FUNCTION with arguments ARGS. | |
415 | SECS may be an integer or a floating point number. | |
416 | ||
417 | If REPEAT is non-nil, do the action each time Emacs has been idle for | |
418 | exactly SECS seconds (that is, only once for each time Emacs becomes idle). | |
419 | ||
420 | This function returns a timer object which you can use in `cancel-timer'." | |
421 | (interactive | |
422 | (list (read-from-minibuffer "Run after idle (seconds): " nil nil t) | |
423 | (y-or-n-p "Repeat each time Emacs is idle? ") | |
424 | (intern (completing-read "Function: " obarray 'fboundp t)))) | |
425 | (let ((timer (timer-create))) | |
426 | (timer-set-function timer function args) | |
427 | (timer-set-idle-time timer secs repeat) | |
428 | (timer-activate-when-idle timer) | |
429 | timer)) | |
430 | \f | |
431 | (defun with-timeout-handler (tag) | |
432 | (throw tag 'timeout)) | |
433 | ||
434 | ;;;###autoload (put 'with-timeout 'lisp-indent-function 1) | |
435 | ||
89c020e8 RS |
436 | (defvar with-timeout-timers nil |
437 | "List of all timers used by currently pending `with-timeout' calls.") | |
438 | ||
5e046f6d JB |
439 | ;;;###autoload |
440 | (defmacro with-timeout (list &rest body) | |
441 | "Run BODY, but if it doesn't finish in SECONDS seconds, give up. | |
442 | If we give up, we run the TIMEOUT-FORMS and return the value of the last one. | |
5e046f6d | 443 | The timeout is checked whenever Emacs waits for some kind of external |
7452fadc | 444 | event (such as keyboard input, input from subprocesses, or a certain time); |
5e046f6d | 445 | if the program loops without waiting in any way, the timeout will not |
7452fadc JB |
446 | be detected. |
447 | \n(fn (SECONDS TIMEOUT-FORMS...) BODY)" | |
5e046f6d JB |
448 | (let ((seconds (car list)) |
449 | (timeout-forms (cdr list))) | |
450 | `(let ((with-timeout-tag (cons nil nil)) | |
89c020e8 RS |
451 | with-timeout-value with-timeout-timer |
452 | (with-timeout-timers with-timeout-timers)) | |
5e046f6d JB |
453 | (if (catch with-timeout-tag |
454 | (progn | |
455 | (setq with-timeout-timer | |
456 | (run-with-timer ,seconds nil | |
457 | 'with-timeout-handler | |
458 | with-timeout-tag)) | |
89c020e8 | 459 | (push with-timeout-timer with-timeout-timers) |
5e046f6d JB |
460 | (setq with-timeout-value (progn . ,body)) |
461 | nil)) | |
462 | (progn . ,timeout-forms) | |
463 | (cancel-timer with-timeout-timer) | |
464 | with-timeout-value)))) | |
465 | ||
89c020e8 RS |
466 | (defun with-timeout-suspend () |
467 | "Stop the clock for `with-timeout'. Used by debuggers. | |
468 | The idea is that the time you spend in the debugger should not | |
469 | count against these timeouts. | |
470 | ||
471 | The value is a list that the debugger can pass to `with-timeout-unsuspend' | |
472 | when it exits, to make these timers start counting again." | |
473 | (mapcar (lambda (timer) | |
474 | (cancel-timer timer) | |
475 | (list timer | |
476 | (time-subtract | |
477 | ;; The time that this timer will go off. | |
478 | (list (aref timer 1) (aref timer 2) (aref timer 3)) | |
479 | (current-time)))) | |
480 | with-timeout-timers)) | |
481 | ||
482 | (defun with-timeout-unsuspend (timer-spec-list) | |
483 | "Restart the clock for `with-timeout'. | |
484 | The argument should be a value previously returned by `with-timeout-suspend'." | |
485 | (dolist (elt timer-spec-list) | |
486 | (let ((timer (car elt)) | |
487 | (delay (cadr elt))) | |
488 | (timer-set-time timer (time-add (current-time) delay)) | |
489 | (timer-activate timer)))) | |
490 | ||
5e046f6d JB |
491 | (defun y-or-n-p-with-timeout (prompt seconds default-value) |
492 | "Like (y-or-n-p PROMPT), with a timeout. | |
493 | If the user does not answer after SECONDS seconds, return DEFAULT-VALUE." | |
494 | (with-timeout (seconds default-value) | |
495 | (y-or-n-p prompt))) | |
496 | \f | |
497 | (defvar timer-duration-words | |
498 | (list (cons "microsec" 0.000001) | |
499 | (cons "microsecond" 0.000001) | |
500 | (cons "millisec" 0.001) | |
501 | (cons "millisecond" 0.001) | |
502 | (cons "sec" 1) | |
503 | (cons "second" 1) | |
504 | (cons "min" 60) | |
505 | (cons "minute" 60) | |
506 | (cons "hour" (* 60 60)) | |
507 | (cons "day" (* 24 60 60)) | |
508 | (cons "week" (* 7 24 60 60)) | |
509 | (cons "fortnight" (* 14 24 60 60)) | |
510 | (cons "month" (* 30 24 60 60)) ; Approximation | |
511 | (cons "year" (* 365.25 24 60 60)) ; Approximation | |
512 | ) | |
513 | "Alist mapping temporal words to durations in seconds") | |
514 | ||
515 | (defun timer-duration (string) | |
516 | "Return number of seconds specified by STRING, or nil if parsing fails." | |
517 | (let ((secs 0) | |
518 | (start 0) | |
519 | (case-fold-search t)) | |
520 | (while (string-match | |
521 | "[ \t]*\\([0-9.]+\\)?[ \t]*\\([a-z]+[a-rt-z]\\)s?[ \t]*" | |
522 | string start) | |
523 | (let ((count (if (match-beginning 1) | |
524 | (string-to-number (match-string 1 string)) | |
525 | 1)) | |
526 | (itemsize (cdr (assoc (match-string 2 string) | |
527 | timer-duration-words)))) | |
528 | (if itemsize | |
529 | (setq start (match-end 0) | |
530 | secs (+ secs (* count itemsize))) | |
531 | (setq secs nil | |
532 | start (length string))))) | |
533 | (if (= start (length string)) | |
534 | secs | |
535 | (if (string-match "\\`[0-9.]+\\'" string) | |
536 | (string-to-number string))))) | |
537 | \f | |
538 | (provide 'timer) | |
539 | ||
ab5796a9 | 540 | ;;; arch-tag: b1a9237b-7787-4382-9e46-8f2c3b3273e0 |
5e046f6d | 541 | ;;; timer.el ends here |