File: | mi/mieq.c |
Location: | line 564, column 9 |
Description: | Dereference of null pointer |
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_H1 | |||
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 DPMSExtension1 | |||
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_SIZE512 512 | |||
64 | #define QUEUE_RESERVED_SIZE64 64 | |||
65 | #define QUEUE_MAXIMUM_SIZE4096 4096 | |||
66 | #define QUEUE_DROP_BACKTRACE_FREQUENCY100 100 | |||
67 | #define QUEUE_DROP_BACKTRACE_MAX10 10 | |||
68 | ||||
69 | #define EnqueueScreen(dev)dev->spriteInfo->sprite->pEnqueueScreen dev->spriteInfo->sprite->pEnqueueScreen | |||
70 | #define DequeueScreen(dev)dev->spriteInfo->sprite->pDequeueScreen 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 FALSE0; | |||
135 | } | |||
136 | ||||
137 | if (new_nevents <= eventQueue->nevents) | |||
138 | return FALSE0; | |||
139 | ||||
140 | new_events = calloc(new_nevents, sizeof(EventRec)); | |||
141 | if (new_events == NULL((void*)0)) { | |||
142 | ErrorF("[mi] mieqGrowQueue memory allocation error.\n"); | |||
143 | return FALSE0; | |||
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,__builtin___memcpy_chk (new_events, &eventQueue->events [eventQueue->head], first_hunk * sizeof(EventRec), __builtin_object_size (new_events, 0)) | |||
156 | &eventQueue->events[eventQueue->head],__builtin___memcpy_chk (new_events, &eventQueue->events [eventQueue->head], first_hunk * sizeof(EventRec), __builtin_object_size (new_events, 0)) | |||
157 | first_hunk * sizeof(EventRec))__builtin___memcpy_chk (new_events, &eventQueue->events [eventQueue->head], first_hunk * sizeof(EventRec), __builtin_object_size (new_events, 0)); | |||
158 | memcpy(&new_events[first_hunk],__builtin___memcpy_chk (&new_events[first_hunk], eventQueue ->events, eventQueue->head * sizeof(EventRec), __builtin_object_size (&new_events[first_hunk], 0)) | |||
159 | eventQueue->events, eventQueue->head * sizeof(EventRec))__builtin___memcpy_chk (&new_events[first_hunk], eventQueue ->events, eventQueue->head * sizeof(EventRec), __builtin_object_size (&new_events[first_hunk], 0)); | |||
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 FALSE0; | |||
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 TRUE1; | |||
186 | } | |||
187 | ||||
188 | Bool | |||
189 | mieqInit(void) | |||
190 | { | |||
191 | memset(&miEventQueue, 0, sizeof(miEventQueue))__builtin___memset_chk (&miEventQueue, 0, sizeof(miEventQueue ), __builtin_object_size (&miEventQueue, 0)); | |||
192 | miEventQueue.lastEventTime = GetTimeInMillis(); | |||
193 | ||||
194 | if (!mieqGrowQueue(&miEventQueue, QUEUE_INITIAL_SIZE512)) | |||
195 | FatalError("Could not allocate event queue.\n"); | |||
196 | ||||
197 | SetInputCheck(&miEventQueue.head, &miEventQueue.tail); | |||
198 | return TRUE1; | |||
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((void*)0)) { | |||
208 | FreeEventList(miEventQueue.events[i].events, 1); | |||
209 | miEventQueue.events[i].events = NULL((void*)0); | |||
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 XFreeXDGA1 | |||
225 | case ET_DGAEvent: | |||
226 | #endif | |||
227 | case ET_RawKeyRelease: | |||
228 | case ET_RawButtonRelease: | |||
229 | case ET_XQuartz: | |||
230 | return TRUE1; | |||
231 | default: | |||
232 | return FALSE0; | |||
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_SIZE64) && | |||
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_FREQUENCY100 == 0 && | |||
287 | miEventQueue.dropped / QUEUE_DROP_BACKTRACE_FREQUENCY100 <= | |||
288 | QUEUE_DROP_BACKTRACE_MAX10) { | |||
289 | ErrorFSigSafe("[mi] EQ overflow continuing. %zu events have been " | |||
290 | "dropped.\n", miEventQueue.dropped); | |||
291 | if (miEventQueue.dropped / QUEUE_DROP_BACKTRACE_FREQUENCY100 == | |||
292 | QUEUE_DROP_BACKTRACE_MAX10) { | |||
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)__builtin___memcpy_chk (evt, e, evlen, __builtin_object_size ( evt, 0)); | |||
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)pDev->spriteInfo->sprite->pEnqueueScreen : NULL((void*)0); | |||
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)pDev->spriteInfo->sprite->pEnqueueScreen = pScreen; | |||
349 | if (set_dequeue_screen) | |||
350 | DequeueScreen(pDev)pDev->spriteInfo->sprite->pDequeueScreen = 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 XFreeXDGA1 | |||
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((void*)0); | |||
460 | ||||
461 | #if XFreeXDGA1 | |||
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_KEYBOARD2; | |||
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_POINTER1; | |||
477 | break; | |||
478 | default: | |||
479 | mtype = MASTER_ATTACHED4; | |||
480 | break; | |||
481 | } | |||
482 | ||||
483 | mdev = GetMaster(sdev, mtype); | |||
484 | memcpy(copy, original, len)__builtin___memcpy_chk (copy, original, len, __builtin_object_size (copy, 0)); | |||
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)dev->spriteInfo->sprite->pDequeueScreen) { | |||
495 | int x = 0, y = 0; | |||
496 | ||||
497 | DequeueScreen(dev)dev->spriteInfo->sprite->pDequeueScreen = screen; | |||
498 | x = event->root_x; | |||
499 | y = event->root_y; | |||
500 | NewCurrentScreen(dev, DequeueScreen(dev)dev->spriteInfo->sprite->pDequeueScreen, 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 | /* refuse events from disabled devices */ | |||
519 | if (dev && !dev->enabled) | |||
520 | return; | |||
521 | ||||
522 | /* Custom event handler */ | |||
523 | handler = miEventQueue.handlers[event->any.type]; | |||
524 | ||||
525 | switch (event->any.type) { | |||
526 | /* Catch events that include valuator information and check if they | |||
527 | * are changing the screen */ | |||
528 | case ET_Motion: | |||
529 | case ET_KeyPress: | |||
530 | case ET_KeyRelease: | |||
531 | case ET_ButtonPress: | |||
532 | case ET_ButtonRelease: | |||
533 | if (!handler) | |||
534 | mieqMoveToNewScreen(dev, screen, &event->device_event); | |||
535 | break; | |||
536 | case ET_TouchBegin: | |||
537 | case ET_TouchUpdate: | |||
538 | case ET_TouchEnd: | |||
539 | if (!handler && (event->device_event.flags & TOUCH_POINTER_EMULATED(1 << 5))) | |||
540 | mieqMoveToNewScreen(dev, screen, &event->device_event); | |||
541 | break; | |||
542 | default: | |||
543 | break; | |||
544 | } | |||
545 | master = CopyGetMasterEvent(dev, event, &mevent); | |||
546 | ||||
547 | if (master) | |||
548 | master->lastSlave = dev; | |||
549 | ||||
550 | /* If someone's registered a custom event handler, let them | |||
551 | * steal it. */ | |||
552 | if (handler) { | |||
553 | int screenNum = dev && | |||
554 | DequeueScreen(dev)dev->spriteInfo->sprite->pDequeueScreen ? DequeueScreen(dev)dev->spriteInfo->sprite->pDequeueScreen->myNum : (screen ? screen-> | |||
555 | myNum : 0); | |||
556 | handler(screenNum, event, dev); | |||
557 | /* Check for the SD's master in case the device got detached | |||
558 | * during event processing */ | |||
559 | if (master && !IsFloating(dev)) | |||
560 | handler(screenNum, &mevent, master); | |||
561 | } | |||
562 | else { | |||
563 | /* process slave first, then master */ | |||
564 | dev->public.processInputProc(event, dev); | |||
| ||||
565 | ||||
566 | /* Check for the SD's master in case the device got detached | |||
567 | * during event processing */ | |||
568 | if (master && !IsFloating(dev)) | |||
569 | master->public.processInputProc(&mevent, master); | |||
570 | } | |||
571 | } | |||
572 | ||||
573 | /* Call this from ProcessInputEvents(). */ | |||
574 | void | |||
575 | mieqProcessInputEvents(void) | |||
576 | { | |||
577 | EventRec *e = NULL((void*)0); | |||
578 | ScreenPtr screen; | |||
579 | InternalEvent event; | |||
580 | DeviceIntPtr dev = NULL((void*)0), master = NULL((void*)0); | |||
581 | size_t n_enqueued; | |||
582 | static Bool inProcessInputEvents = FALSE0; | |||
583 | ||||
584 | #ifdef XQUARTZ | |||
585 | pthread_mutex_lock(&miEventQueueMutex); | |||
586 | #endif | |||
587 | ||||
588 | /* | |||
589 | * report an error if mieqProcessInputEvents() is called recursively; | |||
590 | * this can happen, e.g., if something in the mieqProcessDeviceEvent() | |||
591 | * call chain calls UpdateCurrentTime() instead of UpdateCurrentTimeIf() | |||
592 | */ | |||
593 | BUG_WARN_MSG(inProcessInputEvents, "[mi] mieqProcessInputEvents() called recursively.\n")do { if (inProcessInputEvents) { ErrorFSigSafe("BUG: triggered 'if (" "inProcessInputEvents" ")'\n"); ErrorFSigSafe("BUG: %s:%u in %s()\n" , "mieq.c", 593, __func__); if (1) ErrorFSigSafe("[mi] mieqProcessInputEvents() called recursively.\n" ); xorg_backtrace(); } } while(0); | |||
594 | inProcessInputEvents = TRUE1; | |||
595 | ||||
596 | /* Grow our queue if we are reaching capacity: < 2 * QUEUE_RESERVED_SIZE remaining */ | |||
597 | n_enqueued = mieqNumEnqueued(&miEventQueue); | |||
598 | if (n_enqueued >= (miEventQueue.nevents - (2 * QUEUE_RESERVED_SIZE64)) && | |||
599 | miEventQueue.nevents < QUEUE_MAXIMUM_SIZE4096) { | |||
600 | ErrorF("[mi] Increasing EQ size to %lu to prevent dropped events.\n", | |||
601 | (unsigned long) (miEventQueue.nevents << 1)); | |||
602 | if (!mieqGrowQueue(&miEventQueue, miEventQueue.nevents << 1)) { | |||
603 | ErrorF("[mi] Increasing the size of EQ failed.\n"); | |||
604 | } | |||
605 | } | |||
606 | ||||
607 | if (miEventQueue.dropped) { | |||
| ||||
608 | ErrorF("[mi] EQ processing has resumed after %lu dropped events.\n", | |||
609 | (unsigned long) miEventQueue.dropped); | |||
610 | ErrorF | |||
611 | ("[mi] This may be caused by a misbehaving driver monopolizing the server's resources.\n"); | |||
612 | miEventQueue.dropped = 0; | |||
613 | } | |||
614 | ||||
615 | while (miEventQueue.head != miEventQueue.tail) { | |||
616 | e = &miEventQueue.events[miEventQueue.head]; | |||
617 | ||||
618 | event = *e->events; | |||
619 | dev = e->pDev; | |||
620 | screen = e->pScreen; | |||
621 | ||||
622 | miEventQueue.head = (miEventQueue.head + 1) % miEventQueue.nevents; | |||
623 | ||||
624 | #ifdef XQUARTZ | |||
625 | pthread_mutex_unlock(&miEventQueueMutex); | |||
626 | #endif | |||
627 | ||||
628 | master = (dev) ? GetMaster(dev, MASTER_ATTACHED4) : NULL((void*)0); | |||
629 | ||||
630 | if (screenIsSaved == SCREEN_SAVER_ON0) | |||
631 | dixSaveScreens(serverClient, SCREEN_SAVER_OFF1, ScreenSaverReset0); | |||
632 | #ifdef DPMSExtension1 | |||
633 | else if (DPMSPowerLevel != DPMSModeOn0) | |||
634 | SetScreenSaverTimer(); | |||
635 | ||||
636 | if (DPMSPowerLevel != DPMSModeOn0) | |||
637 | DPMSSet(serverClient, DPMSModeOn0); | |||
638 | #endif | |||
639 | ||||
640 | mieqProcessDeviceEvent(dev, &event, screen); | |||
641 | ||||
642 | /* Update the sprite now. Next event may be from different device. */ | |||
643 | if (master && | |||
644 | (event.any.type == ET_Motion || | |||
645 | ((event.any.type == ET_TouchBegin || | |||
646 | event.any.type == ET_TouchUpdate) && | |||
647 | event.device_event.flags & TOUCH_POINTER_EMULATED(1 << 5)))) | |||
648 | miPointerUpdateSprite(dev); | |||
649 | ||||
650 | #ifdef XQUARTZ | |||
651 | pthread_mutex_lock(&miEventQueueMutex); | |||
652 | #endif | |||
653 | } | |||
654 | ||||
655 | inProcessInputEvents = FALSE0; | |||
656 | ||||
657 | #ifdef XQUARTZ | |||
658 | pthread_mutex_unlock(&miEventQueueMutex); | |||
659 | #endif | |||
660 | } |