1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
|
/*
*
Copyright 1990, 1998 The Open Group
Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.
*
* Author: Keith Packard, MIT X Consortium
*/
/*
* mieq.c
*
* Machine independent event queue
*
*/
#if HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
# include <X11/X.h>
# include <X11/Xmd.h>
# include <X11/Xproto.h>
# include "misc.h"
# include "windowstr.h"
# include "pixmapstr.h"
# include "inputstr.h"
# include "mi.h"
# include "mipointer.h"
# include "scrnintstr.h"
# include <X11/extensions/XI.h>
# include <X11/extensions/XIproto.h>
# include <X11/extensions/geproto.h>
# include "extinit.h"
# include "exglobals.h"
#ifdef DPMSExtension
# include "dpmsproc.h"
# include <X11/extensions/dpmsconst.h>
#endif
#define QUEUE_SIZE 512
#define EnqueueScreen(dev) dev->spriteInfo->sprite->pEnqueueScreen
#define DequeueScreen(dev) dev->spriteInfo->sprite->pDequeueScreen
typedef struct _Event {
EventListPtr events;
ScreenPtr pScreen;
DeviceIntPtr pDev; /* device this event _originated_ from */
} EventRec, *EventPtr;
typedef struct _EventQueue {
HWEventQueueType head, tail; /* long for SetInputCheck */
CARD32 lastEventTime; /* to avoid time running backwards */
int lastMotion; /* device ID if last event motion? */
EventRec events[QUEUE_SIZE]; /* static allocation for signals */
mieqHandler handlers[128]; /* custom event handler */
} EventQueueRec, *EventQueuePtr;
static EventQueueRec miEventQueue;
static EventListPtr masterEvents; /* for use in mieqProcessInputEvents */
#ifdef XQUARTZ
#include <pthread.h>
static pthread_mutex_t miEventQueueMutex = PTHREAD_MUTEX_INITIALIZER;
extern BOOL serverInitComplete;
extern pthread_mutex_t serverInitCompleteMutex;
extern pthread_cond_t serverInitCompleteCond;
static inline void wait_for_server_init(void) {
/* If the server hasn't finished initializing, wait for it... */
if(!serverInitComplete) {
pthread_mutex_lock(&serverInitCompleteMutex);
while(!serverInitComplete)
pthread_cond_wait(&serverInitCompleteCond, &serverInitCompleteMutex);
pthread_mutex_unlock(&serverInitCompleteMutex);
}
}
#endif
Bool
mieqInit(void)
{
int i;
miEventQueue.head = miEventQueue.tail = 0;
miEventQueue.lastEventTime = GetTimeInMillis ();
miEventQueue.lastMotion = FALSE;
for (i = 0; i < 128; i++)
miEventQueue.handlers[i] = NULL;
for (i = 0; i < QUEUE_SIZE; i++)
{
EventListPtr evlist = InitEventList(1);
if (!evlist)
FatalError("Could not allocate event queue.\n");
miEventQueue.events[i].events = evlist;
}
/* XXX: mE is just 1 event long, if we have Motion + Valuator they are
* squashed into the first event to make passing it into the event
* processing handlers easier. This should be fixed when the processing
* handlers switch to EventListPtr instead of xEvent */
masterEvents = InitEventList(1);
if (!masterEvents)
FatalError("Could not allocated MD event queue.\n");
SetMinimumEventSize(masterEvents, 1,
(1 + MAX_VALUATOR_EVENTS) * sizeof(xEvent));
SetInputCheck(&miEventQueue.head, &miEventQueue.tail);
return TRUE;
}
/* Ensure all events in the EQ are at least size bytes. */
void
mieqResizeEvents(int min_size)
{
int i;
for (i = 0; i < QUEUE_SIZE; i++)
SetMinimumEventSize(miEventQueue.events[i].events, 1, min_size);
}
/*
* Must be reentrant with ProcessInputEvents. Assumption: mieqEnqueue
* will never be interrupted. If this is called from both signal
* handlers and regular code, make sure the signal is suspended when
* called from regular code.
*/
void
mieqEnqueue(DeviceIntPtr pDev, InternalEvent *e)
{
unsigned int oldtail = miEventQueue.tail;
EventListPtr evt;
int isMotion = 0;
int evlen;
Time time;
#ifdef XQUARTZ
wait_for_server_init();
pthread_mutex_lock(&miEventQueueMutex);
#endif
CHECKEVENT(e);
/* avoid merging events from different devices */
if (e->any.type == ET_Motion)
isMotion = pDev->id;
if (isMotion && isMotion == miEventQueue.lastMotion &&
oldtail != miEventQueue.head) {
oldtail = (oldtail - 1) % QUEUE_SIZE;
}
else {
static int stuck = 0;
/* Toss events which come in late. Usually this means your server's
* stuck in an infinite loop somewhere, but SIGIO is still getting
* handled. */
if (((oldtail + 1) % QUEUE_SIZE) == miEventQueue.head) {
if (!stuck) {
ErrorF("[mi] EQ overflowing. The server is probably stuck "
"in an infinite loop.\n");
xorg_backtrace();
stuck = 1;
}
#ifdef XQUARTZ
pthread_mutex_unlock(&miEventQueueMutex);
#endif
return;
}
stuck = 0;
}
evlen = e->any.length;
evt = miEventQueue.events[oldtail].events;
if (evt->evlen < evlen)
{
evt->evlen = evlen;
evt->event = xrealloc(evt->event, evt->evlen);
if (!evt->event)
{
ErrorF("[mi] Running out of memory. Tossing event.\n");
#ifdef XQUARTZ
pthread_mutex_unlock(&miEventQueueMutex);
#endif
return;
}
}
memcpy(evt->event, e, evlen);
time = e->any.time;
/* Make sure that event times don't go backwards - this
* is "unnecessary", but very useful. */
if (time < miEventQueue.lastEventTime &&
miEventQueue.lastEventTime - time < 10000)
e->any.time = miEventQueue.lastEventTime;
miEventQueue.lastEventTime = ((InternalEvent*)evt->event)->any.time;
miEventQueue.events[oldtail].pScreen = EnqueueScreen(pDev);
miEventQueue.events[oldtail].pDev = pDev;
miEventQueue.lastMotion = isMotion;
miEventQueue.tail = (oldtail + 1) % QUEUE_SIZE;
#ifdef XQUARTZ
pthread_mutex_unlock(&miEventQueueMutex);
#endif
}
void
mieqSwitchScreen(DeviceIntPtr pDev, ScreenPtr pScreen, Bool fromDIX)
{
#ifdef XQUARTZ
pthread_mutex_lock(&miEventQueueMutex);
#endif
EnqueueScreen(pDev) = pScreen;
if (fromDIX)
DequeueScreen(pDev) = pScreen;
#ifdef XQUARTZ
pthread_mutex_unlock(&miEventQueueMutex);
#endif
}
void
mieqSetHandler(int event, mieqHandler handler)
{
#ifdef XQUARTZ
pthread_mutex_lock(&miEventQueueMutex);
#endif
if (handler && miEventQueue.handlers[event])
ErrorF("[mi] mieq: warning: overriding existing handler %p with %p for "
"event %d\n", miEventQueue.handlers[event], handler, event);
miEventQueue.handlers[event] = handler;
#ifdef XQUARTZ
pthread_mutex_unlock(&miEventQueueMutex);
#endif
}
/**
* Change the device id of the given event to the given device's id.
*/
static void
ChangeDeviceID(DeviceIntPtr dev, InternalEvent* event)
{
switch(event->any.type)
{
case ET_Motion:
case ET_KeyPress:
case ET_KeyRelease:
case ET_ButtonPress:
case ET_ButtonRelease:
case ET_ProximityIn:
case ET_ProximityOut:
case ET_Hierarchy:
case ET_DeviceChanged:
event->device.deviceid = dev->id;
break;
#if XFreeXDGA
case ET_DGAEvent:
break;
#endif
case ET_RawKeyPress:
case ET_RawKeyRelease:
case ET_RawButtonPress:
case ET_RawButtonRelease:
case ET_RawMotion:
event->raw.deviceid = dev->id;
break;
default:
ErrorF("[mi] Unknown event type (%d), cannot change id.\n",
event->any.type);
}
}
static void
FixUpEventForMaster(DeviceIntPtr mdev, DeviceIntPtr sdev,
InternalEvent* original, InternalEvent *master)
{
CHECKEVENT(original);
CHECKEVENT(master);
/* Ensure chained button mappings, i.e. that the detail field is the
* value of the mapped button on the SD, not the physical button */
if (original->any.type == ET_ButtonPress ||
original->any.type == ET_ButtonRelease)
{
int btn = original->device.detail.button;
if (!sdev->button)
return; /* Should never happen */
master->device.detail.button = sdev->button->map[btn];
}
}
/**
* Copy the given event into master.
* @param sdev The slave device the original event comes from
* @param original The event as it came from the EQ
* @param master The event after being copied
* @return The master device or NULL if the device is a floating slave.
*/
DeviceIntPtr
CopyGetMasterEvent(DeviceIntPtr sdev,
InternalEvent* original, EventListPtr mlist)
{
DeviceIntPtr mdev;
int len = original->any.length;
InternalEvent *mevent;
CHECKEVENT(original);
if (!sdev->u.master)
return NULL;
switch(original->any.type)
{
case ET_KeyPress:
case ET_KeyRelease:
mdev = GetMaster(sdev, MASTER_KEYBOARD);
break;
case ET_ButtonPress:
case ET_ButtonRelease:
case ET_Motion:
case ET_ProximityIn:
case ET_ProximityOut:
mdev = GetMaster(sdev, MASTER_POINTER);
break;
default:
mdev = sdev->u.master;
break;
}
if (mlist->evlen < len)
SetMinimumEventSize(mlist, 1, len);
mevent = (InternalEvent*)mlist->event;
memcpy(mevent, original, len);
ChangeDeviceID(mdev, mevent);
FixUpEventForMaster(mdev, sdev, original, mevent);
return mdev;
}
/**
* Post the given @event through the device hierarchy, as appropriate.
* Use this function if an event must be posted for a given device during the
* usual event processing cycle.
*/
void
mieqProcessDeviceEvent(DeviceIntPtr dev,
InternalEvent *event,
ScreenPtr screen)
{
mieqHandler handler;
int x = 0, y = 0;
DeviceIntPtr master;
CHECKEVENT(event);
/* Custom event handler */
handler = miEventQueue.handlers[event->any.type];
if (screen && screen != DequeueScreen(dev) && !handler) {
/* Assumption - screen switching can only occur on motion events. */
DequeueScreen(dev) = screen;
x = event->device.root_x;
y = event->device.root_y;
NewCurrentScreen (dev, DequeueScreen(dev), x, y);
}
else {
master = CopyGetMasterEvent(dev, event, masterEvents);
/* If someone's registered a custom event handler, let them
* steal it. */
if (handler)
{
handler(DequeueScreen(dev)->myNum, event, dev);
if (master)
{
master->u.lastSlave = dev;
handler(DequeueScreen(master)->myNum,
(InternalEvent*)masterEvents->event, master);
}
} else
{
/* process slave first, then master */
dev->public.processInputProc(event, dev);
/* Check for the SD's master in case the device got detached
* during event processing */
if (master && dev->u.master)
master->public.processInputProc(
(InternalEvent*)masterEvents->event,
master);
}
}
}
/* Call this from ProcessInputEvents(). */
void
mieqProcessInputEvents(void)
{
EventRec *e = NULL;
int evlen;
ScreenPtr screen;
static InternalEvent *event = NULL;
static size_t event_size = 0;
DeviceIntPtr dev = NULL,
master = NULL;
#ifdef XQUARTZ
pthread_mutex_lock(&miEventQueueMutex);
#endif
while (miEventQueue.head != miEventQueue.tail) {
e = &miEventQueue.events[miEventQueue.head];
evlen = e->events->evlen;
if(evlen > event_size)
event = xrealloc(event, evlen);
if (!event)
FatalError("[mi] No memory left for event processing.\n");
memcpy(event, e->events->event, evlen);
dev = e->pDev;
screen = e->pScreen;
miEventQueue.head = (miEventQueue.head + 1) % QUEUE_SIZE;
#ifdef XQUARTZ
pthread_mutex_unlock(&miEventQueueMutex);
#endif
master = (!IsMaster(dev) && dev->u.master) ? dev->u.master : NULL;
if (screenIsSaved == SCREEN_SAVER_ON)
dixSaveScreens (serverClient, SCREEN_SAVER_OFF, ScreenSaverReset);
#ifdef DPMSExtension
else if (DPMSPowerLevel != DPMSModeOn)
SetScreenSaverTimer();
if (DPMSPowerLevel != DPMSModeOn)
DPMSSet(serverClient, DPMSModeOn);
#endif
mieqProcessDeviceEvent(dev, event, screen);
/* Update the sprite now. Next event may be from different device. */
if (event->any.type == ET_Motion && master)
miPointerUpdateSprite(dev);
#ifdef XQUARTZ
pthread_mutex_lock(&miEventQueueMutex);
#endif
}
#ifdef XQUARTZ
pthread_mutex_unlock(&miEventQueueMutex);
#endif
}
|