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a09e091a JB |
1 | /*********************************************************** |
2 | ||
3 | Copyright 1987, 1998 The Open Group | |
4 | ||
5 | Permission to use, copy, modify, distribute, and sell this software and its | |
6 | documentation for any purpose is hereby granted without fee, provided that | |
7 | the above copyright notice appear in all copies and that both that | |
8 | copyright notice and this permission notice appear in supporting | |
9 | documentation. | |
10 | ||
11 | The above copyright notice and this permission notice shall be included in | |
12 | all copies or substantial portions of the Software. | |
13 | ||
14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
17 | OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN | |
18 | AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
19 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
20 | ||
21 | Except as contained in this notice, the name of The Open Group shall not be | |
22 | used in advertising or otherwise to promote the sale, use or other dealings | |
23 | in this Software without prior written authorization from The Open Group. | |
24 | ||
25 | Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts. | |
26 | ||
27 | All Rights Reserved | |
28 | ||
29 | Permission to use, copy, modify, and distribute this software and its | |
30 | documentation for any purpose and without fee is hereby granted, | |
31 | provided that the above copyright notice appear in all copies and that | |
32 | both that copyright notice and this permission notice appear in | |
33 | supporting documentation, and that the name of Digital not be | |
34 | used in advertising or publicity pertaining to distribution of the | |
35 | software without specific, written prior permission. | |
36 | ||
37 | DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING | |
38 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL | |
39 | DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR | |
40 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, | |
41 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, | |
42 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |
43 | SOFTWARE. | |
44 | ||
45 | ******************************************************************/ | |
46 | ||
47 | /***************************************************************** | |
48 | * OS Dependent input routines: | |
49 | * | |
50 | * WaitForSomething | |
51 | * TimerForce, TimerSet, TimerCheck, TimerFree | |
52 | * | |
53 | *****************************************************************/ | |
54 | ||
55 | #ifdef HAVE_DIX_CONFIG_H | |
56 | #include <dix-config.h> | |
57 | #endif | |
58 | ||
59 | #ifdef WIN32 | |
60 | #include <X11/Xwinsock.h> | |
61 | #endif | |
62 | #include <X11/Xos.h> /* for strings, fcntl, time */ | |
63 | #include <errno.h> | |
64 | #include <stdio.h> | |
65 | #include <X11/X.h> | |
66 | #include "misc.h" | |
67 | ||
68 | #include "osdep.h" | |
69 | #include <X11/Xpoll.h> | |
70 | #include "dixstruct.h" | |
71 | #include "opaque.h" | |
72 | #ifdef DPMSExtension | |
73 | #include "dpmsproc.h" | |
74 | #endif | |
75 | #include "busfault.h" | |
76 | ||
77 | #ifdef WIN32 | |
78 | /* Error codes from windows sockets differ from fileio error codes */ | |
79 | #undef EINTR | |
80 | #define EINTR WSAEINTR | |
81 | #undef EINVAL | |
82 | #define EINVAL WSAEINVAL | |
83 | #undef EBADF | |
84 | #define EBADF WSAENOTSOCK | |
85 | /* Windows select does not set errno. Use GetErrno as wrapper for | |
86 | WSAGetLastError */ | |
87 | #define GetErrno WSAGetLastError | |
88 | #else | |
89 | /* This is just a fallback to errno to hide the differences between unix and | |
90 | Windows in the code */ | |
91 | #define GetErrno() errno | |
92 | #endif | |
93 | ||
94 | /* like ffs, but uses fd_mask instead of int as argument, so it works | |
95 | when fd_mask is longer than an int, such as common 64-bit platforms */ | |
96 | /* modifications by raphael */ | |
97 | int | |
98 | mffs(fd_mask mask) | |
99 | { | |
100 | int i; | |
101 | ||
102 | if (!mask) | |
103 | return 0; | |
104 | i = 1; | |
105 | while (!(mask & 1)) { | |
106 | i++; | |
107 | mask >>= 1; | |
108 | } | |
109 | return i; | |
110 | } | |
111 | ||
112 | #ifdef DPMSExtension | |
113 | #include <X11/extensions/dpmsconst.h> | |
114 | #endif | |
115 | ||
116 | struct _OsTimerRec { | |
117 | OsTimerPtr next; | |
118 | CARD32 expires; | |
119 | CARD32 delta; | |
120 | OsTimerCallback callback; | |
121 | pointer arg; | |
122 | }; | |
123 | ||
124 | static void DoTimer(OsTimerPtr timer, CARD32 now, OsTimerPtr *prev); | |
125 | static void CheckAllTimers(void); | |
126 | static OsTimerPtr timers = NULL; | |
127 | ||
128 | /***************** | |
129 | * WaitForSomething: | |
130 | * Make the server suspend until there is | |
131 | * 1. data from clients or | |
132 | * 2. input events available or | |
133 | * 3. ddx notices something of interest (graphics | |
134 | * queue ready, etc.) or | |
135 | * 4. clients that have buffered replies/events are ready | |
136 | * | |
137 | * If the time between INPUT events is | |
138 | * greater than ScreenSaverTime, the display is turned off (or | |
139 | * saved, depending on the hardware). So, WaitForSomething() | |
140 | * has to handle this also (that's why the select() has a timeout. | |
141 | * For more info on ClientsWithInput, see ReadRequestFromClient(). | |
142 | * pClientsReady is an array to store ready client->index values into. | |
143 | *****************/ | |
144 | ||
145 | int | |
146 | WaitForSomething(int *pClientsReady) | |
147 | { | |
148 | int i; | |
149 | struct timeval waittime, *wt; | |
150 | INT32 timeout = 0; | |
151 | fd_set clientsReadable; | |
152 | fd_set clientsWritable; | |
153 | int curclient; | |
154 | int selecterr; | |
155 | static int nready; | |
156 | fd_set devicesReadable; | |
157 | CARD32 now = 0; | |
158 | Bool someReady = FALSE; | |
159 | ||
160 | FD_ZERO(&clientsReadable); | |
161 | ||
162 | if (nready) | |
163 | SmartScheduleStopTimer(); | |
164 | nready = 0; | |
165 | ||
166 | #ifdef BUSFAULT | |
167 | busfault_check(); | |
168 | #endif | |
169 | ||
170 | /* We need a while loop here to handle | |
171 | crashed connections and the screen saver timeout */ | |
172 | while (1) { | |
173 | /* deal with any blocked jobs */ | |
174 | if (workQueue) | |
175 | ProcessWorkQueue(); | |
176 | if (XFD_ANYSET(&ClientsWithInput)) { | |
177 | if (!SmartScheduleDisable) { | |
178 | someReady = TRUE; | |
179 | waittime.tv_sec = 0; | |
180 | waittime.tv_usec = 0; | |
181 | wt = &waittime; | |
182 | } | |
183 | else { | |
184 | XFD_COPYSET(&ClientsWithInput, &clientsReadable); | |
185 | break; | |
186 | } | |
187 | } | |
188 | if (someReady) { | |
189 | XFD_COPYSET(&AllSockets, &LastSelectMask); | |
190 | XFD_UNSET(&LastSelectMask, &ClientsWithInput); | |
191 | } | |
192 | else { | |
193 | wt = NULL; | |
194 | if (timers) { | |
195 | now = GetTimeInMillis(); | |
196 | timeout = timers->expires - now; | |
197 | if (timeout > 0 && timeout > timers->delta + 250) { | |
198 | /* time has rewound. reset the timers. */ | |
199 | CheckAllTimers(); | |
200 | } | |
201 | ||
202 | if (timers) { | |
203 | timeout = timers->expires - now; | |
204 | if (timeout < 0) | |
205 | timeout = 0; | |
206 | waittime.tv_sec = timeout / MILLI_PER_SECOND; | |
207 | waittime.tv_usec = (timeout % MILLI_PER_SECOND) * | |
208 | (1000000 / MILLI_PER_SECOND); | |
209 | wt = &waittime; | |
210 | } | |
211 | } | |
212 | XFD_COPYSET(&AllSockets, &LastSelectMask); | |
213 | } | |
214 | ||
215 | BlockHandler((pointer) &wt, (pointer) &LastSelectMask); | |
216 | if (NewOutputPending) | |
217 | FlushAllOutput(); | |
218 | /* keep this check close to select() call to minimize race */ | |
219 | if (dispatchException) | |
220 | i = -1; | |
221 | else if (AnyClientsWriteBlocked) { | |
222 | XFD_COPYSET(&ClientsWriteBlocked, &clientsWritable); | |
223 | i = Select(MaxClients, &LastSelectMask, &clientsWritable, NULL, wt); | |
224 | } | |
225 | else { | |
226 | i = Select(MaxClients, &LastSelectMask, NULL, NULL, wt); | |
227 | } | |
228 | selecterr = GetErrno(); | |
229 | WakeupHandler(i, (pointer) &LastSelectMask); | |
230 | if (i <= 0) { /* An error or timeout occurred */ | |
231 | if (dispatchException) | |
232 | return 0; | |
233 | if (i < 0) { | |
234 | if (selecterr == EBADF) { /* Some client disconnected */ | |
235 | CheckConnections(); | |
236 | if (!XFD_ANYSET(&AllClients)) | |
237 | return 0; | |
238 | } | |
239 | else if (selecterr == EINVAL) { | |
240 | FatalError("WaitForSomething(): select: %s\n", | |
241 | strerror(selecterr)); | |
242 | } | |
243 | else if (selecterr != EINTR && selecterr != EAGAIN) { | |
244 | ErrorF("WaitForSomething(): select: %s\n", | |
245 | strerror(selecterr)); | |
246 | } | |
247 | } | |
248 | else if (someReady) { | |
249 | /* | |
250 | * If no-one else is home, bail quickly | |
251 | */ | |
252 | XFD_COPYSET(&ClientsWithInput, &LastSelectMask); | |
253 | XFD_COPYSET(&ClientsWithInput, &clientsReadable); | |
254 | break; | |
255 | } | |
256 | if (*checkForInput[0] != *checkForInput[1]) | |
257 | return 0; | |
258 | ||
259 | if (timers) { | |
260 | int expired = 0; | |
261 | ||
262 | now = GetTimeInMillis(); | |
263 | if ((int) (timers->expires - now) <= 0) | |
264 | expired = 1; | |
265 | ||
266 | while (timers && (int) (timers->expires - now) <= 0) | |
267 | DoTimer(timers, now, &timers); | |
268 | ||
269 | if (expired) | |
270 | return 0; | |
271 | } | |
272 | } | |
273 | else { | |
274 | fd_set tmp_set; | |
275 | ||
276 | if (*checkForInput[0] == *checkForInput[1]) { | |
277 | if (timers) { | |
278 | int expired = 0; | |
279 | ||
280 | now = GetTimeInMillis(); | |
281 | if ((int) (timers->expires - now) <= 0) | |
282 | expired = 1; | |
283 | ||
284 | while (timers && (int) (timers->expires - now) <= 0) | |
285 | DoTimer(timers, now, &timers); | |
286 | ||
287 | if (expired) | |
288 | return 0; | |
289 | } | |
290 | } | |
291 | if (someReady) | |
292 | XFD_ORSET(&LastSelectMask, &ClientsWithInput, &LastSelectMask); | |
293 | if (AnyClientsWriteBlocked && XFD_ANYSET(&clientsWritable)) { | |
294 | NewOutputPending = TRUE; | |
295 | XFD_ORSET(&OutputPending, &clientsWritable, &OutputPending); | |
296 | XFD_UNSET(&ClientsWriteBlocked, &clientsWritable); | |
297 | if (!XFD_ANYSET(&ClientsWriteBlocked)) | |
298 | AnyClientsWriteBlocked = FALSE; | |
299 | } | |
300 | ||
301 | XFD_ANDSET(&devicesReadable, &LastSelectMask, &EnabledDevices); | |
302 | XFD_ANDSET(&clientsReadable, &LastSelectMask, &AllClients); | |
303 | XFD_ANDSET(&tmp_set, &LastSelectMask, &WellKnownConnections); | |
304 | if (XFD_ANYSET(&tmp_set)) | |
305 | QueueWorkProc(EstablishNewConnections, NULL, | |
306 | (pointer) &LastSelectMask); | |
307 | ||
308 | if (XFD_ANYSET(&devicesReadable) || XFD_ANYSET(&clientsReadable)) | |
309 | break; | |
310 | /* check here for DDXes that queue events during Block/Wakeup */ | |
311 | if (*checkForInput[0] != *checkForInput[1]) | |
312 | return 0; | |
313 | } | |
314 | } | |
315 | ||
316 | nready = 0; | |
317 | if (XFD_ANYSET(&clientsReadable)) { | |
318 | #ifndef WIN32 | |
319 | for (i = 0; i < howmany(XFD_SETSIZE, NFDBITS); i++) { | |
320 | int highest_priority = 0; | |
321 | ||
322 | while (clientsReadable.fds_bits[i]) { | |
323 | int client_priority, client_index; | |
324 | ||
325 | curclient = mffs(clientsReadable.fds_bits[i]) - 1; | |
326 | client_index = /* raphael: modified */ | |
327 | ConnectionTranslation[curclient + | |
328 | (i * (sizeof(fd_mask) * 8))]; | |
329 | #else | |
330 | int highest_priority = 0; | |
331 | fd_set savedClientsReadable; | |
332 | ||
333 | XFD_COPYSET(&clientsReadable, &savedClientsReadable); | |
334 | for (i = 0; i < XFD_SETCOUNT(&savedClientsReadable); i++) { | |
335 | int client_priority, client_index; | |
336 | ||
337 | curclient = XFD_FD(&savedClientsReadable, i); | |
338 | client_index = GetConnectionTranslation(curclient); | |
339 | #endif | |
340 | /* We implement "strict" priorities. | |
341 | * Only the highest priority client is returned to | |
342 | * dix. If multiple clients at the same priority are | |
343 | * ready, they are all returned. This means that an | |
344 | * aggressive client could take over the server. | |
345 | * This was not considered a big problem because | |
346 | * aggressive clients can hose the server in so many | |
347 | * other ways :) | |
348 | */ | |
349 | client_priority = clients[client_index]->priority; | |
350 | if (nready == 0 || client_priority > highest_priority) { | |
351 | /* Either we found the first client, or we found | |
352 | * a client whose priority is greater than all others | |
353 | * that have been found so far. Either way, we want | |
354 | * to initialize the list of clients to contain just | |
355 | * this client. | |
356 | */ | |
357 | pClientsReady[0] = client_index; | |
358 | highest_priority = client_priority; | |
359 | nready = 1; | |
360 | } | |
361 | /* the following if makes sure that multiple same-priority | |
362 | * clients get batched together | |
363 | */ | |
364 | else if (client_priority == highest_priority) { | |
365 | pClientsReady[nready++] = client_index; | |
366 | } | |
367 | #ifndef WIN32 | |
368 | clientsReadable.fds_bits[i] &= ~(((fd_mask) 1L) << curclient); | |
369 | } | |
370 | #else | |
371 | FD_CLR(curclient, &clientsReadable); | |
372 | #endif | |
373 | } | |
374 | } | |
375 | ||
376 | if (nready) | |
377 | SmartScheduleStartTimer(); | |
378 | ||
379 | return nready; | |
380 | } | |
381 | ||
382 | /* If time has rewound, re-run every affected timer. | |
383 | * Timers might drop out of the list, so we have to restart every time. */ | |
384 | static void | |
385 | CheckAllTimers(void) | |
386 | { | |
387 | OsTimerPtr timer; | |
388 | CARD32 now; | |
389 | ||
390 | OsBlockSignals(); | |
391 | start: | |
392 | now = GetTimeInMillis(); | |
393 | ||
394 | for (timer = timers; timer; timer = timer->next) { | |
395 | if (timer->expires - now > timer->delta + 250) { | |
396 | TimerForce(timer); | |
397 | goto start; | |
398 | } | |
399 | } | |
400 | OsReleaseSignals(); | |
401 | } | |
402 | ||
403 | static void | |
404 | DoTimer(OsTimerPtr timer, CARD32 now, OsTimerPtr *prev) | |
405 | { | |
406 | CARD32 newTime; | |
407 | ||
408 | OsBlockSignals(); | |
409 | *prev = timer->next; | |
410 | timer->next = NULL; | |
411 | newTime = (*timer->callback) (timer, now, timer->arg); | |
412 | if (newTime) | |
413 | TimerSet(timer, 0, newTime, timer->callback, timer->arg); | |
414 | OsReleaseSignals(); | |
415 | } | |
416 | ||
417 | OsTimerPtr | |
418 | TimerSet(OsTimerPtr timer, int flags, CARD32 millis, | |
419 | OsTimerCallback func, pointer arg) | |
420 | { | |
421 | register OsTimerPtr *prev; | |
422 | CARD32 now = GetTimeInMillis(); | |
423 | ||
424 | if (!timer) { | |
425 | timer = malloc(sizeof(struct _OsTimerRec)); | |
426 | if (!timer) | |
427 | return NULL; | |
428 | } | |
429 | else { | |
430 | OsBlockSignals(); | |
431 | for (prev = &timers; *prev; prev = &(*prev)->next) { | |
432 | if (*prev == timer) { | |
433 | *prev = timer->next; | |
434 | if (flags & TimerForceOld) | |
435 | (void) (*timer->callback) (timer, now, timer->arg); | |
436 | break; | |
437 | } | |
438 | } | |
439 | OsReleaseSignals(); | |
440 | } | |
441 | if (!millis) | |
442 | return timer; | |
443 | if (flags & TimerAbsolute) { | |
444 | timer->delta = millis - now; | |
445 | } | |
446 | else { | |
447 | timer->delta = millis; | |
448 | millis += now; | |
449 | } | |
450 | timer->expires = millis; | |
451 | timer->callback = func; | |
452 | timer->arg = arg; | |
453 | if ((int) (millis - now) <= 0) { | |
454 | timer->next = NULL; | |
455 | millis = (*timer->callback) (timer, now, timer->arg); | |
456 | if (!millis) | |
457 | return timer; | |
458 | } | |
459 | OsBlockSignals(); | |
460 | for (prev = &timers; | |
461 | *prev && (int) ((*prev)->expires - millis) <= 0; | |
462 | prev = &(*prev)->next); | |
463 | timer->next = *prev; | |
464 | *prev = timer; | |
465 | OsReleaseSignals(); | |
466 | return timer; | |
467 | } | |
468 | ||
469 | Bool | |
470 | TimerForce(OsTimerPtr timer) | |
471 | { | |
472 | int rc = FALSE; | |
473 | OsTimerPtr *prev; | |
474 | ||
475 | OsBlockSignals(); | |
476 | for (prev = &timers; *prev; prev = &(*prev)->next) { | |
477 | if (*prev == timer) { | |
478 | DoTimer(timer, GetTimeInMillis(), prev); | |
479 | rc = TRUE; | |
480 | break; | |
481 | } | |
482 | } | |
483 | OsReleaseSignals(); | |
484 | return rc; | |
485 | } | |
486 | ||
487 | void | |
488 | TimerCancel(OsTimerPtr timer) | |
489 | { | |
490 | OsTimerPtr *prev; | |
491 | ||
492 | if (!timer) | |
493 | return; | |
494 | OsBlockSignals(); | |
495 | for (prev = &timers; *prev; prev = &(*prev)->next) { | |
496 | if (*prev == timer) { | |
497 | *prev = timer->next; | |
498 | break; | |
499 | } | |
500 | } | |
501 | OsReleaseSignals(); | |
502 | } | |
503 | ||
504 | void | |
505 | TimerFree(OsTimerPtr timer) | |
506 | { | |
507 | if (!timer) | |
508 | return; | |
509 | TimerCancel(timer); | |
510 | free(timer); | |
511 | } | |
512 | ||
513 | void | |
514 | TimerCheck(void) | |
515 | { | |
516 | CARD32 now = GetTimeInMillis(); | |
517 | ||
518 | while (timers && (int) (timers->expires - now) <= 0) | |
519 | DoTimer(timers, now, &timers); | |
520 | } | |
521 | ||
522 | void | |
523 | TimerInit(void) | |
524 | { | |
525 | OsTimerPtr timer; | |
526 | ||
527 | while ((timer = timers)) { | |
528 | timers = timer->next; | |
529 | free(timer); | |
530 | } | |
531 | } | |
532 | ||
533 | #ifdef DPMSExtension | |
534 | ||
535 | #define DPMS_CHECK_MODE(mode,time)\ | |
536 | if (time > 0 && DPMSPowerLevel < mode && timeout >= time)\ | |
537 | DPMSSet(serverClient, mode); | |
538 | ||
539 | #define DPMS_CHECK_TIMEOUT(time)\ | |
540 | if (time > 0 && (time - timeout) > 0)\ | |
541 | return time - timeout; | |
542 | ||
543 | static CARD32 | |
544 | NextDPMSTimeout(INT32 timeout) | |
545 | { | |
546 | /* | |
547 | * Return the amount of time remaining until we should set | |
548 | * the next power level. Fallthroughs are intentional. | |
549 | */ | |
550 | switch (DPMSPowerLevel) { | |
551 | case DPMSModeOn: | |
552 | DPMS_CHECK_TIMEOUT(DPMSStandbyTime) | |
553 | ||
554 | case DPMSModeStandby: | |
555 | DPMS_CHECK_TIMEOUT(DPMSSuspendTime) | |
556 | ||
557 | case DPMSModeSuspend: | |
558 | DPMS_CHECK_TIMEOUT(DPMSOffTime) | |
559 | ||
560 | default: /* DPMSModeOff */ | |
561 | return 0; | |
562 | } | |
563 | } | |
564 | #endif /* DPMSExtension */ | |
565 | ||
566 | static CARD32 | |
567 | ScreenSaverTimeoutExpire(OsTimerPtr timer, CARD32 now, pointer arg) | |
568 | { | |
569 | INT32 timeout = now - LastEventTime(XIAllDevices).milliseconds; | |
570 | CARD32 nextTimeout = 0; | |
571 | ||
572 | #ifdef DPMSExtension | |
573 | /* | |
574 | * Check each mode lowest to highest, since a lower mode can | |
575 | * have the same timeout as a higher one. | |
576 | */ | |
577 | if (DPMSEnabled) { | |
578 | DPMS_CHECK_MODE(DPMSModeOff, DPMSOffTime) | |
579 | DPMS_CHECK_MODE(DPMSModeSuspend, DPMSSuspendTime) | |
580 | DPMS_CHECK_MODE(DPMSModeStandby, DPMSStandbyTime) | |
581 | ||
582 | nextTimeout = NextDPMSTimeout(timeout); | |
583 | } | |
584 | ||
585 | /* | |
586 | * Only do the screensaver checks if we're not in a DPMS | |
587 | * power saving mode | |
588 | */ | |
589 | if (DPMSPowerLevel != DPMSModeOn) | |
590 | return nextTimeout; | |
591 | #endif /* DPMSExtension */ | |
592 | ||
593 | if (!ScreenSaverTime) | |
594 | return nextTimeout; | |
595 | ||
596 | if (timeout < ScreenSaverTime) { | |
597 | return nextTimeout > 0 ? | |
598 | min(ScreenSaverTime - timeout, nextTimeout) : | |
599 | ScreenSaverTime - timeout; | |
600 | } | |
601 | ||
602 | ResetOsBuffers(); /* not ideal, but better than nothing */ | |
603 | dixSaveScreens(serverClient, SCREEN_SAVER_ON, ScreenSaverActive); | |
604 | ||
605 | if (ScreenSaverInterval > 0) { | |
606 | nextTimeout = nextTimeout > 0 ? | |
607 | min(ScreenSaverInterval, nextTimeout) : ScreenSaverInterval; | |
608 | } | |
609 | ||
610 | return nextTimeout; | |
611 | } | |
612 | ||
613 | static OsTimerPtr ScreenSaverTimer = NULL; | |
614 | ||
615 | void | |
616 | FreeScreenSaverTimer(void) | |
617 | { | |
618 | if (ScreenSaverTimer) { | |
619 | TimerFree(ScreenSaverTimer); | |
620 | ScreenSaverTimer = NULL; | |
621 | } | |
622 | } | |
623 | ||
624 | void | |
625 | SetScreenSaverTimer(void) | |
626 | { | |
627 | CARD32 timeout = 0; | |
628 | ||
629 | #ifdef DPMSExtension | |
630 | if (DPMSEnabled) { | |
631 | /* | |
632 | * A higher DPMS level has a timeout that's either less | |
633 | * than or equal to that of a lower DPMS level. | |
634 | */ | |
635 | if (DPMSStandbyTime > 0) | |
636 | timeout = DPMSStandbyTime; | |
637 | ||
638 | else if (DPMSSuspendTime > 0) | |
639 | timeout = DPMSSuspendTime; | |
640 | ||
641 | else if (DPMSOffTime > 0) | |
642 | timeout = DPMSOffTime; | |
643 | } | |
644 | #endif | |
645 | ||
646 | if (ScreenSaverTime > 0) { | |
647 | timeout = timeout > 0 ? min(ScreenSaverTime, timeout) : ScreenSaverTime; | |
648 | } | |
649 | ||
650 | #ifdef SCREENSAVER | |
651 | if (timeout && !screenSaverSuspended) { | |
652 | #else | |
653 | if (timeout) { | |
654 | #endif | |
655 | ScreenSaverTimer = TimerSet(ScreenSaverTimer, 0, timeout, | |
656 | ScreenSaverTimeoutExpire, NULL); | |
657 | } | |
658 | else if (ScreenSaverTimer) { | |
659 | FreeScreenSaverTimer(); | |
660 | } | |
661 | } |