| 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 | static InternalEvent event; | |||
| 580 | DeviceIntPtr dev = NULL((void*)0), master = NULL((void*)0); | |||
| 581 | size_t n_enqueued; | |||
| 582 | ||||
| 583 | #ifdef XQUARTZ | |||
| 584 | pthread_mutex_lock(&miEventQueueMutex); | |||
| 585 | #endif | |||
| 586 | ||||
| 587 | /* Grow our queue if we are reaching capacity: < 2 * QUEUE_RESERVED_SIZE remaining */ | |||
| 588 | n_enqueued = mieqNumEnqueued(&miEventQueue); | |||
| 589 | if (n_enqueued >= (miEventQueue.nevents - (2 * QUEUE_RESERVED_SIZE64)) && | |||
| 590 | miEventQueue.nevents < QUEUE_MAXIMUM_SIZE4096) { | |||
| 591 | ErrorF("[mi] Increasing EQ size to %lu to prevent dropped events.\n", | |||
| 592 | (unsigned long) (miEventQueue.nevents << 1)); | |||
| 593 | if (!mieqGrowQueue(&miEventQueue, miEventQueue.nevents << 1)) { | |||
| 594 | ErrorF("[mi] Increasing the size of EQ failed.\n"); | |||
| 595 | } | |||
| 596 | } | |||
| 597 | ||||
| 598 | if (miEventQueue.dropped) { | |||
| ||||
| 599 | ErrorF("[mi] EQ processing has resumed after %lu dropped events.\n", | |||
| 600 | (unsigned long) miEventQueue.dropped); | |||
| 601 | ErrorF | |||
| 602 | ("[mi] This may be caused by a misbehaving driver monopolizing the server's resources.\n"); | |||
| 603 | miEventQueue.dropped = 0; | |||
| 604 | } | |||
| 605 | ||||
| 606 | while (miEventQueue.head != miEventQueue.tail) { | |||
| 607 | e = &miEventQueue.events[miEventQueue.head]; | |||
| 608 | ||||
| 609 | event = *e->events; | |||
| 610 | dev = e->pDev; | |||
| 611 | screen = e->pScreen; | |||
| 612 | ||||
| 613 | miEventQueue.head = (miEventQueue.head + 1) % miEventQueue.nevents; | |||
| 614 | ||||
| 615 | #ifdef XQUARTZ | |||
| 616 | pthread_mutex_unlock(&miEventQueueMutex); | |||
| 617 | #endif | |||
| 618 | ||||
| 619 | master = (dev) ? GetMaster(dev, MASTER_ATTACHED4) : NULL((void*)0); | |||
| 620 | ||||
| 621 | if (screenIsSaved == SCREEN_SAVER_ON0) | |||
| 622 | dixSaveScreens(serverClient, SCREEN_SAVER_OFF1, ScreenSaverReset0); | |||
| 623 | #ifdef DPMSExtension1 | |||
| 624 | else if (DPMSPowerLevel != DPMSModeOn0) | |||
| 625 | SetScreenSaverTimer(); | |||
| 626 | ||||
| 627 | if (DPMSPowerLevel != DPMSModeOn0) | |||
| 628 | DPMSSet(serverClient, DPMSModeOn0); | |||
| 629 | #endif | |||
| 630 | ||||
| 631 | mieqProcessDeviceEvent(dev, &event, screen); | |||
| 632 | ||||
| 633 | /* Update the sprite now. Next event may be from different device. */ | |||
| 634 | if (master && | |||
| 635 | (event.any.type == ET_Motion || | |||
| 636 | ((event.any.type == ET_TouchBegin || | |||
| 637 | event.any.type == ET_TouchUpdate) && | |||
| 638 | event.device_event.flags & TOUCH_POINTER_EMULATED(1 << 5)))) | |||
| 639 | miPointerUpdateSprite(dev); | |||
| 640 | ||||
| 641 | #ifdef XQUARTZ | |||
| 642 | pthread_mutex_lock(&miEventQueueMutex); | |||
| 643 | #endif | |||
| 644 | } | |||
| 645 | #ifdef XQUARTZ | |||
| 646 | pthread_mutex_unlock(&miEventQueueMutex); | |||
| 647 | #endif | |||
| 648 | } |