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1 | /* |
2 | * | |
3 | Copyright 1990, 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 | * Author: Keith Packard, MIT X Consortium | |
26 | */ | |
27 | ||
28 | /* | |
29 | * mieq.c | |
30 | * | |
31 | * Machine independent event queue | |
32 | * | |
33 | */ | |
34 | ||
35 | #if HAVE_DIX_CONFIG_H | |
36 | #include <dix-config.h> | |
37 | #endif | |
38 | ||
39 | #include <X11/X.h> | |
40 | #include <X11/Xmd.h> | |
41 | #include <X11/Xproto.h> | |
42 | #include "misc.h" | |
43 | #include "windowstr.h" | |
44 | #include "pixmapstr.h" | |
45 | #include "inputstr.h" | |
46 | #include "inpututils.h" | |
47 | #include "mi.h" | |
48 | #include "mipointer.h" | |
49 | #include "scrnintstr.h" | |
50 | #include <X11/extensions/XI.h> | |
51 | #include <X11/extensions/XIproto.h> | |
52 | #include <X11/extensions/geproto.h> | |
53 | #include "extinit.h" | |
54 | #include "exglobals.h" | |
55 | #include "eventstr.h" | |
56 | ||
57 | #ifdef DPMSExtension | |
58 | #include "dpmsproc.h" | |
59 | #include <X11/extensions/dpmsconst.h> | |
60 | #endif | |
61 | ||
62 | /* Maximum size should be initial size multiplied by a power of 2 */ | |
63 | #define QUEUE_INITIAL_SIZE 512 | |
64 | #define QUEUE_RESERVED_SIZE 64 | |
65 | #define QUEUE_MAXIMUM_SIZE 4096 | |
66 | #define QUEUE_DROP_BACKTRACE_FREQUENCY 100 | |
67 | #define QUEUE_DROP_BACKTRACE_MAX 10 | |
68 | ||
69 | #define EnqueueScreen(dev) dev->spriteInfo->sprite->pEnqueueScreen | |
70 | #define DequeueScreen(dev) dev->spriteInfo->sprite->pDequeueScreen | |
71 | ||
72 | typedef struct _Event { | |
73 | InternalEvent *events; | |
74 | ScreenPtr pScreen; | |
75 | DeviceIntPtr pDev; /* device this event _originated_ from */ | |
76 | } EventRec, *EventPtr; | |
77 | ||
78 | typedef struct _EventQueue { | |
79 | HWEventQueueType head, tail; /* long for SetInputCheck */ | |
80 | CARD32 lastEventTime; /* to avoid time running backwards */ | |
81 | int lastMotion; /* device ID if last event motion? */ | |
82 | EventRec *events; /* our queue as an array */ | |
83 | size_t nevents; /* the number of buckets in our queue */ | |
84 | size_t dropped; /* counter for number of consecutive dropped events */ | |
85 | mieqHandler handlers[128]; /* custom event handler */ | |
86 | } EventQueueRec, *EventQueuePtr; | |
87 | ||
88 | static EventQueueRec miEventQueue; | |
89 | ||
90 | #ifdef XQUARTZ | |
91 | #include <pthread.h> | |
92 | static pthread_mutex_t miEventQueueMutex = PTHREAD_MUTEX_INITIALIZER; | |
93 | ||
94 | extern BOOL serverRunning; | |
95 | extern pthread_mutex_t serverRunningMutex; | |
96 | extern pthread_cond_t serverRunningCond; | |
97 | ||
98 | static inline void | |
99 | wait_for_server_init(void) | |
100 | { | |
101 | /* If the server hasn't finished initializing, wait for it... */ | |
102 | if (!serverRunning) { | |
103 | pthread_mutex_lock(&serverRunningMutex); | |
104 | while (!serverRunning) | |
105 | pthread_cond_wait(&serverRunningCond, &serverRunningMutex); | |
106 | pthread_mutex_unlock(&serverRunningMutex); | |
107 | } | |
108 | } | |
109 | #endif | |
110 | ||
111 | static size_t | |
112 | mieqNumEnqueued(EventQueuePtr eventQueue) | |
113 | { | |
114 | size_t n_enqueued = 0; | |
115 | ||
116 | if (eventQueue->nevents) { | |
117 | /* % is not well-defined with negative numbers... sigh */ | |
118 | n_enqueued = eventQueue->tail - eventQueue->head + eventQueue->nevents; | |
119 | if (n_enqueued >= eventQueue->nevents) | |
120 | n_enqueued -= eventQueue->nevents; | |
121 | } | |
122 | return n_enqueued; | |
123 | } | |
124 | ||
125 | /* Pre-condition: Called with miEventQueueMutex held */ | |
126 | static Bool | |
127 | mieqGrowQueue(EventQueuePtr eventQueue, size_t new_nevents) | |
128 | { | |
129 | size_t i, n_enqueued, first_hunk; | |
130 | EventRec *new_events; | |
131 | ||
132 | if (!eventQueue) { | |
133 | ErrorF("[mi] mieqGrowQueue called with a NULL eventQueue\n"); | |
134 | return FALSE; | |
135 | } | |
136 | ||
137 | if (new_nevents <= eventQueue->nevents) | |
138 | return FALSE; | |
139 | ||
140 | new_events = calloc(new_nevents, sizeof(EventRec)); | |
141 | if (new_events == NULL) { | |
142 | ErrorF("[mi] mieqGrowQueue memory allocation error.\n"); | |
143 | return FALSE; | |
144 | } | |
145 | ||
146 | n_enqueued = mieqNumEnqueued(eventQueue); | |
147 | ||
148 | /* We block signals, so an mieqEnqueue triggered by SIGIO does not | |
149 | * write to our queue as we are modifying it. | |
150 | */ | |
151 | OsBlockSignals(); | |
152 | ||
153 | /* First copy the existing events */ | |
154 | first_hunk = eventQueue->nevents - eventQueue->head; | |
155 | memcpy(new_events, | |
156 | &eventQueue->events[eventQueue->head], | |
157 | first_hunk * sizeof(EventRec)); | |
158 | memcpy(&new_events[first_hunk], | |
159 | eventQueue->events, eventQueue->head * sizeof(EventRec)); | |
160 | ||
161 | /* Initialize the new portion */ | |
162 | for (i = eventQueue->nevents; i < new_nevents; i++) { | |
163 | InternalEvent *evlist = InitEventList(1); | |
164 | ||
165 | if (!evlist) { | |
166 | size_t j; | |
167 | ||
168 | for (j = 0; j < i; j++) | |
169 | FreeEventList(new_events[j].events, 1); | |
170 | free(new_events); | |
171 | OsReleaseSignals(); | |
172 | return FALSE; | |
173 | } | |
174 | new_events[i].events = evlist; | |
175 | } | |
176 | ||
177 | /* And update our record */ | |
178 | eventQueue->tail = n_enqueued; | |
179 | eventQueue->head = 0; | |
180 | eventQueue->nevents = new_nevents; | |
181 | free(eventQueue->events); | |
182 | eventQueue->events = new_events; | |
183 | ||
184 | OsReleaseSignals(); | |
185 | return TRUE; | |
186 | } | |
187 | ||
188 | Bool | |
189 | mieqInit(void) | |
190 | { | |
191 | memset(&miEventQueue, 0, sizeof(miEventQueue)); | |
192 | miEventQueue.lastEventTime = GetTimeInMillis(); | |
193 | ||
194 | if (!mieqGrowQueue(&miEventQueue, QUEUE_INITIAL_SIZE)) | |
195 | FatalError("Could not allocate event queue.\n"); | |
196 | ||
197 | SetInputCheck(&miEventQueue.head, &miEventQueue.tail); | |
198 | return TRUE; | |
199 | } | |
200 | ||
201 | void | |
202 | mieqFini(void) | |
203 | { | |
204 | int i; | |
205 | ||
206 | for (i = 0; i < miEventQueue.nevents; i++) { | |
207 | if (miEventQueue.events[i].events != NULL) { | |
208 | FreeEventList(miEventQueue.events[i].events, 1); | |
209 | miEventQueue.events[i].events = NULL; | |
210 | } | |
211 | } | |
212 | free(miEventQueue.events); | |
213 | } | |
214 | ||
215 | /* This function will determine if the given event is allowed to used the reserved | |
216 | * queue space. | |
217 | */ | |
218 | static Bool | |
219 | mieqReservedCandidate(InternalEvent *e) | |
220 | { | |
221 | switch (e->any.type) { | |
222 | case ET_KeyRelease: | |
223 | case ET_ButtonRelease: | |
224 | #if XFreeXDGA | |
225 | case ET_DGAEvent: | |
226 | #endif | |
227 | case ET_RawKeyRelease: | |
228 | case ET_RawButtonRelease: | |
229 | case ET_XQuartz: | |
230 | return TRUE; | |
231 | default: | |
232 | return FALSE; | |
233 | } | |
234 | } | |
235 | ||
236 | /* | |
237 | * Must be reentrant with ProcessInputEvents. Assumption: mieqEnqueue | |
238 | * will never be interrupted. If this is called from both signal | |
239 | * handlers and regular code, make sure the signal is suspended when | |
240 | * called from regular code. | |
241 | */ | |
242 | ||
243 | void | |
244 | mieqEnqueue(DeviceIntPtr pDev, InternalEvent *e) | |
245 | { | |
246 | unsigned int oldtail = miEventQueue.tail; | |
247 | InternalEvent *evt; | |
248 | int isMotion = 0; | |
249 | int evlen; | |
250 | Time time; | |
251 | size_t n_enqueued; | |
252 | ||
253 | #ifdef XQUARTZ | |
254 | wait_for_server_init(); | |
255 | pthread_mutex_lock(&miEventQueueMutex); | |
256 | #endif | |
257 | ||
258 | verify_internal_event(e); | |
259 | ||
260 | n_enqueued = mieqNumEnqueued(&miEventQueue); | |
261 | ||
262 | /* avoid merging events from different devices */ | |
263 | if (e->any.type == ET_Motion) | |
264 | isMotion = pDev->id; | |
265 | ||
266 | if (isMotion && isMotion == miEventQueue.lastMotion && | |
267 | oldtail != miEventQueue.head) { | |
268 | oldtail = (oldtail - 1) % miEventQueue.nevents; | |
269 | } | |
270 | else if ((n_enqueued + 1 == miEventQueue.nevents) || | |
271 | ((n_enqueued + 1 >= miEventQueue.nevents - QUEUE_RESERVED_SIZE) && | |
272 | !mieqReservedCandidate(e))) { | |
273 | /* Toss events which come in late. Usually this means your server's | |
274 | * stuck in an infinite loop somewhere, but SIGIO is still getting | |
275 | * handled. | |
276 | */ | |
277 | miEventQueue.dropped++; | |
278 | if (miEventQueue.dropped == 1) { | |
279 | ErrorFSigSafe("[mi] EQ overflowing. Additional events will be " | |
280 | "discarded until existing events are processed.\n"); | |
281 | xorg_backtrace(); | |
282 | ErrorFSigSafe("[mi] These backtraces from mieqEnqueue may point to " | |
283 | "a culprit higher up the stack.\n"); | |
284 | ErrorFSigSafe("[mi] mieq is *NOT* the cause. It is a victim.\n"); | |
285 | } | |
286 | else if (miEventQueue.dropped % QUEUE_DROP_BACKTRACE_FREQUENCY == 0 && | |
287 | miEventQueue.dropped / QUEUE_DROP_BACKTRACE_FREQUENCY <= | |
288 | QUEUE_DROP_BACKTRACE_MAX) { | |
289 | ErrorFSigSafe("[mi] EQ overflow continuing. %u events have been " | |
290 | "dropped.\n", miEventQueue.dropped); | |
291 | if (miEventQueue.dropped / QUEUE_DROP_BACKTRACE_FREQUENCY == | |
292 | QUEUE_DROP_BACKTRACE_MAX) { | |
293 | ErrorFSigSafe("[mi] No further overflow reports will be " | |
294 | "reported until the clog is cleared.\n"); | |
295 | } | |
296 | xorg_backtrace(); | |
297 | } | |
298 | ||
299 | #ifdef XQUARTZ | |
300 | pthread_mutex_unlock(&miEventQueueMutex); | |
301 | #endif | |
302 | return; | |
303 | } | |
304 | ||
305 | evlen = e->any.length; | |
306 | evt = miEventQueue.events[oldtail].events; | |
307 | memcpy(evt, e, evlen); | |
308 | ||
309 | time = e->any.time; | |
310 | /* Make sure that event times don't go backwards - this | |
311 | * is "unnecessary", but very useful. */ | |
312 | if (time < miEventQueue.lastEventTime && | |
313 | miEventQueue.lastEventTime - time < 10000) | |
314 | e->any.time = miEventQueue.lastEventTime; | |
315 | ||
316 | miEventQueue.lastEventTime = evt->any.time; | |
317 | miEventQueue.events[oldtail].pScreen = pDev ? EnqueueScreen(pDev) : NULL; | |
318 | miEventQueue.events[oldtail].pDev = pDev; | |
319 | ||
320 | miEventQueue.lastMotion = isMotion; | |
321 | miEventQueue.tail = (oldtail + 1) % miEventQueue.nevents; | |
322 | #ifdef XQUARTZ | |
323 | pthread_mutex_unlock(&miEventQueueMutex); | |
324 | #endif | |
325 | } | |
326 | ||
327 | /** | |
328 | * Changes the screen reference events are being enqueued from. | |
329 | * Input events are enqueued with a screen reference and dequeued and | |
330 | * processed with a (potentially different) screen reference. | |
331 | * This function is called whenever a new event has changed screen but is | |
332 | * still logically on the previous screen as seen by the client. | |
333 | * This usually happens whenever the visible cursor moves across screen | |
334 | * boundaries during event generation, before the same event is processed | |
335 | * and sent down the wire. | |
336 | * | |
337 | * @param pDev The device that triggered a screen change. | |
338 | * @param pScreen The new screen events are being enqueued for. | |
339 | * @param set_dequeue_screen If TRUE, pScreen is set as both enqueue screen | |
340 | * and dequeue screen. | |
341 | */ | |
342 | void | |
343 | mieqSwitchScreen(DeviceIntPtr pDev, ScreenPtr pScreen, Bool set_dequeue_screen) | |
344 | { | |
345 | #ifdef XQUARTZ | |
346 | pthread_mutex_lock(&miEventQueueMutex); | |
347 | #endif | |
348 | EnqueueScreen(pDev) = pScreen; | |
349 | if (set_dequeue_screen) | |
350 | DequeueScreen(pDev) = pScreen; | |
351 | #ifdef XQUARTZ | |
352 | pthread_mutex_unlock(&miEventQueueMutex); | |
353 | #endif | |
354 | } | |
355 | ||
356 | void | |
357 | mieqSetHandler(int event, mieqHandler handler) | |
358 | { | |
359 | #ifdef XQUARTZ | |
360 | pthread_mutex_lock(&miEventQueueMutex); | |
361 | #endif | |
362 | if (handler && miEventQueue.handlers[event]) | |
363 | ErrorF("[mi] mieq: warning: overriding existing handler %p with %p for " | |
364 | "event %d\n", miEventQueue.handlers[event], handler, event); | |
365 | ||
366 | miEventQueue.handlers[event] = handler; | |
367 | #ifdef XQUARTZ | |
368 | pthread_mutex_unlock(&miEventQueueMutex); | |
369 | #endif | |
370 | } | |
371 | ||
372 | /** | |
373 | * Change the device id of the given event to the given device's id. | |
374 | */ | |
375 | static void | |
376 | ChangeDeviceID(DeviceIntPtr dev, InternalEvent *event) | |
377 | { | |
378 | switch (event->any.type) { | |
379 | case ET_Motion: | |
380 | case ET_KeyPress: | |
381 | case ET_KeyRelease: | |
382 | case ET_ButtonPress: | |
383 | case ET_ButtonRelease: | |
384 | case ET_ProximityIn: | |
385 | case ET_ProximityOut: | |
386 | case ET_Hierarchy: | |
387 | case ET_DeviceChanged: | |
388 | case ET_TouchBegin: | |
389 | case ET_TouchUpdate: | |
390 | case ET_TouchEnd: | |
391 | event->device_event.deviceid = dev->id; | |
392 | break; | |
393 | case ET_TouchOwnership: | |
394 | event->touch_ownership_event.deviceid = dev->id; | |
395 | break; | |
396 | #if XFreeXDGA | |
397 | case ET_DGAEvent: | |
398 | break; | |
399 | #endif | |
400 | case ET_RawKeyPress: | |
401 | case ET_RawKeyRelease: | |
402 | case ET_RawButtonPress: | |
403 | case ET_RawButtonRelease: | |
404 | case ET_RawMotion: | |
405 | case ET_RawTouchBegin: | |
406 | case ET_RawTouchEnd: | |
407 | case ET_RawTouchUpdate: | |
408 | event->raw_event.deviceid = dev->id; | |
409 | break; | |
410 | case ET_BarrierHit: | |
411 | case ET_BarrierLeave: | |
412 | event->barrier_event.deviceid = dev->id; | |
413 | break; | |
414 | default: | |
415 | ErrorF("[mi] Unknown event type (%d), cannot change id.\n", | |
416 | event->any.type); | |
417 | } | |
418 | } | |
419 | ||
420 | static void | |
421 | FixUpEventForMaster(DeviceIntPtr mdev, DeviceIntPtr sdev, | |
422 | InternalEvent *original, InternalEvent *master) | |
423 | { | |
424 | verify_internal_event(original); | |
425 | verify_internal_event(master); | |
426 | /* Ensure chained button mappings, i.e. that the detail field is the | |
427 | * value of the mapped button on the SD, not the physical button */ | |
428 | if (original->any.type == ET_ButtonPress || | |
429 | original->any.type == ET_ButtonRelease) { | |
430 | int btn = original->device_event.detail.button; | |
431 | ||
432 | if (!sdev->button) | |
433 | return; /* Should never happen */ | |
434 | ||
435 | master->device_event.detail.button = sdev->button->map[btn]; | |
436 | } | |
437 | } | |
438 | ||
439 | /** | |
440 | * Copy the given event into master. | |
441 | * @param sdev The slave device the original event comes from | |
442 | * @param original The event as it came from the EQ | |
443 | * @param copy The event after being copied | |
444 | * @return The master device or NULL if the device is a floating slave. | |
445 | */ | |
446 | DeviceIntPtr | |
447 | CopyGetMasterEvent(DeviceIntPtr sdev, | |
448 | InternalEvent *original, InternalEvent *copy) | |
449 | { | |
450 | DeviceIntPtr mdev; | |
451 | int len = original->any.length; | |
452 | int type = original->any.type; | |
453 | int mtype; /* which master type? */ | |
454 | ||
455 | verify_internal_event(original); | |
456 | ||
457 | /* ET_XQuartz has sdev == NULL */ | |
458 | if (!sdev || IsMaster(sdev) || IsFloating(sdev)) | |
459 | return NULL; | |
460 | ||
461 | #if XFreeXDGA | |
462 | if (type == ET_DGAEvent) | |
463 | type = original->dga_event.subtype; | |
464 | #endif | |
465 | ||
466 | switch (type) { | |
467 | case ET_KeyPress: | |
468 | case ET_KeyRelease: | |
469 | mtype = MASTER_KEYBOARD; | |
470 | break; | |
471 | case ET_ButtonPress: | |
472 | case ET_ButtonRelease: | |
473 | case ET_Motion: | |
474 | case ET_ProximityIn: | |
475 | case ET_ProximityOut: | |
476 | mtype = MASTER_POINTER; | |
477 | break; | |
478 | default: | |
479 | mtype = MASTER_ATTACHED; | |
480 | break; | |
481 | } | |
482 | ||
483 | mdev = GetMaster(sdev, mtype); | |
484 | memcpy(copy, original, len); | |
485 | ChangeDeviceID(mdev, copy); | |
486 | FixUpEventForMaster(mdev, sdev, original, copy); | |
487 | ||
488 | return mdev; | |
489 | } | |
490 | ||
491 | static void | |
492 | mieqMoveToNewScreen(DeviceIntPtr dev, ScreenPtr screen, DeviceEvent *event) | |
493 | { | |
494 | if (dev && screen && screen != DequeueScreen(dev)) { | |
495 | int x = 0, y = 0; | |
496 | ||
497 | DequeueScreen(dev) = screen; | |
498 | x = event->root_x; | |
499 | y = event->root_y; | |
500 | NewCurrentScreen(dev, DequeueScreen(dev), x, y); | |
501 | } | |
502 | } | |
503 | ||
504 | /** | |
505 | * Post the given @event through the device hierarchy, as appropriate. | |
506 | * Use this function if an event must be posted for a given device during the | |
507 | * usual event processing cycle. | |
508 | */ | |
509 | void | |
510 | mieqProcessDeviceEvent(DeviceIntPtr dev, InternalEvent *event, ScreenPtr screen) | |
511 | { | |
512 | mieqHandler handler; | |
513 | DeviceIntPtr master; | |
514 | InternalEvent mevent; /* master event */ | |
515 | ||
516 | verify_internal_event(event); | |
517 | ||
518 | /* Custom event handler */ | |
519 | handler = miEventQueue.handlers[event->any.type]; | |
520 | ||
521 | switch (event->any.type) { | |
522 | /* Catch events that include valuator information and check if they | |
523 | * are changing the screen */ | |
524 | case ET_Motion: | |
525 | case ET_KeyPress: | |
526 | case ET_KeyRelease: | |
527 | case ET_ButtonPress: | |
528 | case ET_ButtonRelease: | |
529 | if (!handler) | |
530 | mieqMoveToNewScreen(dev, screen, &event->device_event); | |
531 | break; | |
532 | case ET_TouchBegin: | |
533 | case ET_TouchUpdate: | |
534 | case ET_TouchEnd: | |
535 | if (!handler && (event->device_event.flags & TOUCH_POINTER_EMULATED)) | |
536 | mieqMoveToNewScreen(dev, screen, &event->device_event); | |
537 | break; | |
538 | default: | |
539 | break; | |
540 | } | |
541 | master = CopyGetMasterEvent(dev, event, &mevent); | |
542 | ||
543 | if (master) | |
544 | master->lastSlave = dev; | |
545 | ||
546 | /* If someone's registered a custom event handler, let them | |
547 | * steal it. */ | |
548 | if (handler) { | |
549 | int screenNum = dev && | |
550 | DequeueScreen(dev) ? DequeueScreen(dev)->myNum : (screen ? screen-> | |
551 | myNum : 0); | |
552 | handler(screenNum, event, dev); | |
553 | /* Check for the SD's master in case the device got detached | |
554 | * during event processing */ | |
555 | if (master && !IsFloating(dev)) | |
556 | handler(screenNum, &mevent, master); | |
557 | } | |
558 | else { | |
559 | /* process slave first, then master */ | |
560 | dev->public.processInputProc(event, dev); | |
561 | ||
562 | /* Check for the SD's master in case the device got detached | |
563 | * during event processing */ | |
564 | if (master && !IsFloating(dev)) | |
565 | master->public.processInputProc(&mevent, master); | |
566 | } | |
567 | } | |
568 | ||
569 | /* Call this from ProcessInputEvents(). */ | |
570 | void | |
571 | mieqProcessInputEvents(void) | |
572 | { | |
573 | EventRec *e = NULL; | |
574 | ScreenPtr screen; | |
575 | static InternalEvent event; | |
576 | DeviceIntPtr dev = NULL, master = NULL; | |
577 | size_t n_enqueued; | |
578 | ||
579 | #ifdef XQUARTZ | |
580 | pthread_mutex_lock(&miEventQueueMutex); | |
581 | #endif | |
582 | ||
583 | /* Grow our queue if we are reaching capacity: < 2 * QUEUE_RESERVED_SIZE remaining */ | |
584 | n_enqueued = mieqNumEnqueued(&miEventQueue); | |
585 | if (n_enqueued >= (miEventQueue.nevents - (2 * QUEUE_RESERVED_SIZE)) && | |
586 | miEventQueue.nevents < QUEUE_MAXIMUM_SIZE) { | |
587 | ErrorF("[mi] Increasing EQ size to %lu to prevent dropped events.\n", | |
588 | miEventQueue.nevents << 1); | |
589 | if (!mieqGrowQueue(&miEventQueue, miEventQueue.nevents << 1)) { | |
590 | ErrorF("[mi] Increasing the size of EQ failed.\n"); | |
591 | } | |
592 | } | |
593 | ||
594 | if (miEventQueue.dropped) { | |
595 | ErrorF("[mi] EQ processing has resumed after %lu dropped events.\n", | |
596 | miEventQueue.dropped); | |
597 | ErrorF | |
598 | ("[mi] This may be caused my a misbehaving driver monopolizing the server's resources.\n"); | |
599 | miEventQueue.dropped = 0; | |
600 | } | |
601 | ||
602 | while (miEventQueue.head != miEventQueue.tail) { | |
603 | e = &miEventQueue.events[miEventQueue.head]; | |
604 | ||
605 | event = *e->events; | |
606 | dev = e->pDev; | |
607 | screen = e->pScreen; | |
608 | ||
609 | miEventQueue.head = (miEventQueue.head + 1) % miEventQueue.nevents; | |
610 | ||
611 | #ifdef XQUARTZ | |
612 | pthread_mutex_unlock(&miEventQueueMutex); | |
613 | #endif | |
614 | ||
615 | master = (dev) ? GetMaster(dev, MASTER_ATTACHED) : NULL; | |
616 | ||
617 | if (screenIsSaved == SCREEN_SAVER_ON) | |
618 | dixSaveScreens(serverClient, SCREEN_SAVER_OFF, ScreenSaverReset); | |
619 | #ifdef DPMSExtension | |
620 | else if (DPMSPowerLevel != DPMSModeOn) | |
621 | SetScreenSaverTimer(); | |
622 | ||
623 | if (DPMSPowerLevel != DPMSModeOn) | |
624 | DPMSSet(serverClient, DPMSModeOn); | |
625 | #endif | |
626 | ||
627 | mieqProcessDeviceEvent(dev, &event, screen); | |
628 | ||
629 | /* Update the sprite now. Next event may be from different device. */ | |
630 | if (master && | |
631 | (event.any.type == ET_Motion || | |
632 | ((event.any.type == ET_TouchBegin || | |
633 | event.any.type == ET_TouchUpdate) && | |
634 | event.device_event.flags & TOUCH_POINTER_EMULATED))) | |
635 | miPointerUpdateSprite(dev); | |
636 | ||
637 | #ifdef XQUARTZ | |
638 | pthread_mutex_lock(&miEventQueueMutex); | |
639 | #endif | |
640 | } | |
641 | #ifdef XQUARTZ | |
642 | pthread_mutex_unlock(&miEventQueueMutex); | |
643 | #endif | |
644 | } |