dlls/winemac.drv/cocoa_event.m

   1 /*
   2  * MACDRV Cocoa event queue code
   3  *
   4  * Copyright 2011, 2012, 2013 Ken Thomases for CodeWeavers Inc.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <sys/types.h>
  22 #include <sys/event.h>
  23 #include <sys/time.h>
  24 #include <libkern/OSAtomic.h>
  25 #import <Carbon/Carbon.h>
  26
  27 #include "macdrv_cocoa.h"
  28 #import "cocoa_event.h"
  29 #import "cocoa_app.h"
  30 #import "cocoa_window.h"
  31
  32
  33 static NSString* const WineEventQueueThreadDictionaryKey = @"WineEventQueueThreadDictionaryKey";
  34
  35 static NSString* const WineHotKeyMacIDKey       = @"macID";
  36 static NSString* const WineHotKeyVkeyKey        = @"vkey";
  37 static NSString* const WineHotKeyModFlagsKey    = @"modFlags";
  38 static NSString* const WineHotKeyKeyCodeKey     = @"keyCode";
  39 static NSString* const WineHotKeyCarbonRefKey   = @"hotKeyRef";
  40 static const OSType WineHotKeySignature = 'Wine';
  41
  42
  43 @implementation NSEvent (WineExtensions)
  44
  45     static BOOL wine_commandKeyDown(NSUInteger flags)
  46     {
  47         return ((flags & (NSEventModifierFlagShift |
  48                           NSEventModifierFlagControl |
  49                           NSEventModifierFlagOption |
  50                           NSEventModifierFlagCommand)) == NSEventModifierFlagCommand);
  51     }
  52
  53     + (BOOL) wine_commandKeyDown
  54     {
  55         return wine_commandKeyDown([self modifierFlags]);
  56     }
  57
  58     - (BOOL) wine_commandKeyDown
  59     {
  60         return wine_commandKeyDown([self modifierFlags]);
  61     }
  62
  63 @end
  64
  65
  66 @interface MacDrvEvent : NSObject
  67 {
  68 @public
  69     macdrv_event* event;
  70 }
  71
  72     - (id) initWithEvent:(macdrv_event*)event;
  73
  74 @end
  75
  76 @implementation MacDrvEvent
  77
  78     - (id) initWithEvent:(macdrv_event*)inEvent
  79     {
  80         self = [super init];
  81         if (self)
  82         {
  83             event = macdrv_retain_event(inEvent);
  84         }
  85         return self;
  86     }
  87
  88     - (void) dealloc
  89     {
  90         if (event) macdrv_release_event(event);
  91         [super dealloc];
  92     }
  93
  94 @end
  95
  96
  97 @implementation WineEventQueue
  98
  99     - (id) init
 100     {
 101         [self doesNotRecognizeSelector:_cmd];
 102         [self release];
 103         return nil;
 104     }
 105
 106     - (id) initWithEventHandler:(macdrv_event_handler)handler
 107     {
 108         NSParameterAssert(handler != nil);
 109
 110         self = [super init];
 111         if (self != nil)
 112         {
 113             struct kevent kev;
 114             int rc;
 115
 116             fds[0] = fds[1] = kq = -1;
 117
 118             event_handler = handler;
 119             events = [[NSMutableArray alloc] init];
 120             eventsLock = [[NSLock alloc] init];
 121
 122             if (!events || !eventsLock)
 123             {
 124                 [self release];
 125                 return nil;
 126             }
 127
 128             if (pipe(fds) ||
 129                 fcntl(fds[0], F_SETFD, 1) == -1 ||
 130                 fcntl(fds[0], F_SETFL, O_NONBLOCK) == -1 ||
 131                 fcntl(fds[1], F_SETFD, 1) == -1 ||
 132                 fcntl(fds[1], F_SETFL, O_NONBLOCK) == -1)
 133             {
 134                 [self release];
 135                 return nil;
 136             }
 137
 138             kq = kqueue();
 139             if (kq < 0)
 140             {
 141                 [self release];
 142                 return nil;
 143             }
 144
 145             EV_SET(&kev, fds[0], EVFILT_READ, EV_ADD | EV_ENABLE, 0, 0, 0);
 146             do
 147             {
 148                 rc = kevent(kq, &kev, 1, NULL, 0, NULL);
 149             } while (rc == -1 && errno == EINTR);
 150             if (rc == -1)
 151             {
 152                 [self release];
 153                 return nil;
 154             }
 155         }
 156         return self;
 157     }
 158
 159     - (void) dealloc
 160     {
 161         NSNumber* hotKeyMacID;
 162
 163         for (hotKeyMacID in hotKeysByMacID)
 164         {
 165             NSDictionary* hotKeyDict = [hotKeysByMacID objectForKey:hotKeyMacID];
 166             EventHotKeyRef hotKeyRef = [[hotKeyDict objectForKey:WineHotKeyCarbonRefKey] pointerValue];
 167             UnregisterEventHotKey(hotKeyRef);
 168         }
 169         [hotKeysByMacID release];
 170         [hotKeysByWinID release];
 171         [events release];
 172         [eventsLock release];
 173
 174         if (kq != -1) close(kq);
 175         if (fds[0] != -1) close(fds[0]);
 176         if (fds[1] != -1) close(fds[1]);
 177
 178         [super dealloc];
 179     }
 180
 181     - (void) signalEventAvailable
 182     {
 183         char junk = 1;
 184         int rc;
 185
 186         do
 187         {
 188             rc = write(fds[1], &junk, 1);
 189         } while (rc < 0 && errno == EINTR);
 190
 191         if (rc < 0 && errno != EAGAIN)
 192             ERR(@"%@: got error writing to event queue signaling pipe: %s\n", self, strerror(errno));
 193     }
 194
 195     - (void) postEventObject:(MacDrvEvent*)event
 196     {
 197         NSIndexSet* indexes;
 198         MacDrvEvent* lastEvent;
 199
 200         [eventsLock lock];
 201
 202         indexes = [events indexesOfObjectsPassingTest:^BOOL(id obj, NSUInteger idx, BOOL *stop){
 203             return ((MacDrvEvent*)obj)->event->deliver <= 0;
 204         }];
 205         [events removeObjectsAtIndexes:indexes];
 206
 207         if ((event->event->type == MOUSE_MOVED ||
 208              event->event->type == MOUSE_MOVED_ABSOLUTE) &&
 209             event->event->deliver == INT_MAX &&
 210             (lastEvent = [events lastObject]) &&
 211             (lastEvent->event->type == MOUSE_MOVED ||
 212              lastEvent->event->type == MOUSE_MOVED_ABSOLUTE) &&
 213             lastEvent->event->deliver == INT_MAX &&
 214             lastEvent->event->window == event->event->window &&
 215             lastEvent->event->mouse_moved.drag == event->event->mouse_moved.drag)
 216         {
 217             if (event->event->type == MOUSE_MOVED)
 218             {
 219                 lastEvent->event->mouse_moved.x += event->event->mouse_moved.x;
 220                 lastEvent->event->mouse_moved.y += event->event->mouse_moved.y;
 221             }
 222             else
 223             {
 224                 lastEvent->event->type = MOUSE_MOVED_ABSOLUTE;
 225                 lastEvent->event->mouse_moved.x = event->event->mouse_moved.x;
 226                 lastEvent->event->mouse_moved.y = event->event->mouse_moved.y;
 227             }
 228
 229             lastEvent->event->mouse_moved.time_ms = event->event->mouse_moved.time_ms;
 230         }
 231         else
 232             [events addObject:event];
 233
 234         [eventsLock unlock];
 235
 236         [self signalEventAvailable];
 237     }
 238
 239     - (void) postEvent:(macdrv_event*)inEvent
 240     {
 241         MacDrvEvent* event = [[MacDrvEvent alloc] initWithEvent:inEvent];
 242         [self postEventObject:event];
 243         [event release];
 244     }
 245
 246     - (MacDrvEvent*) getEventMatchingMask:(macdrv_event_mask)mask
 247     {
 248         char buf[512];
 249         int rc;
 250         NSUInteger index;
 251         MacDrvEvent* ret = nil;
 252
 253         /* Clear the pipe which signals there are pending events. */
 254         do
 255         {
 256             rc = read(fds[0], buf, sizeof(buf));
 257         } while (rc > 0 || (rc < 0 && errno == EINTR));
 258         if (rc == 0 || (rc < 0 && errno != EAGAIN))
 259         {
 260             if (rc == 0)
 261                 ERR(@"%@: event queue signaling pipe unexpectedly closed\n", self);
 262             else
 263                 ERR(@"%@: got error reading from event queue signaling pipe: %s\n", self, strerror(errno));
 264             return nil;
 265         }
 266
 267         [eventsLock lock];
 268
 269         index = 0;
 270         while (index < [events count])
 271         {
 272             MacDrvEvent* event = [events objectAtIndex:index];
 273             if (event_mask_for_type(event->event->type) & mask)
 274             {
 275                 [[event retain] autorelease];
 276                 [events removeObjectAtIndex:index];
 277
 278                 if (event->event->deliver == INT_MAX ||
 279                     OSAtomicDecrement32Barrier(&event->event->deliver) >= 0)
 280                 {
 281                     ret = event;
 282                     break;
 283                 }
 284             }
 285             else
 286                 index++;
 287         }
 288
 289         [eventsLock unlock];
 290         return ret;
 291     }
 292
 293     - (void) discardEventsPassingTest:(BOOL (^)(macdrv_event* event))block
 294     {
 295         NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
 296         NSIndexSet* indexes;
 297
 298         [eventsLock lock];
 299
 300         indexes = [events indexesOfObjectsPassingTest:^BOOL(id obj, NSUInteger idx, BOOL *stop){
 301             MacDrvEvent* event = obj;
 302             return block(event->event);
 303         }];
 304
 305         [events removeObjectsAtIndexes:indexes];
 306
 307         [eventsLock unlock];
 308
 309         [pool release];
 310     }
 311
 312     - (void) discardEventsMatchingMask:(macdrv_event_mask)mask forWindow:(NSWindow*)window
 313     {
 314         [self discardEventsPassingTest:^BOOL (macdrv_event* event){
 315             return ((event_mask_for_type(event->type) & mask) &&
 316                     (!window || event->window == (macdrv_window)window));
 317         }];
 318     }
 319
 320     - (BOOL) query:(macdrv_query*)query timeout:(NSTimeInterval)timeout flags:(NSUInteger)flags
 321     {
 322         int type;
 323         macdrv_event* event;
 324         NSDate* timeoutDate = [NSDate dateWithTimeIntervalSinceNow:timeout];
 325         BOOL timedout;
 326
 327         type = (flags & WineQueryNoPreemptWait) ? QUERY_EVENT_NO_PREEMPT_WAIT : QUERY_EVENT;
 328         event = macdrv_create_event(type, (WineWindow*)query->window);
 329         event->query_event.query = macdrv_retain_query(query);
 330         query->done = FALSE;
 331
 332         [self postEvent:event];
 333         macdrv_release_event(event);
 334         timedout = ![[WineApplicationController sharedController] waitUntilQueryDone:&query->done
 335                                                                              timeout:timeoutDate
 336                                                                        processEvents:(flags & WineQueryProcessEvents) != 0];
 337         return !timedout && query->status;
 338     }
 339
 340     - (BOOL) query:(macdrv_query*)query timeout:(NSTimeInterval)timeout
 341     {
 342         return [self query:query timeout:timeout flags:0];
 343     }
 344
 345     - (void) resetMouseEventPositions:(CGPoint)pos
 346     {
 347         MacDrvEvent* event;
 348
 349         pos = cgpoint_win_from_mac(pos);
 350
 351         [eventsLock lock];
 352
 353         for (event in events)
 354         {
 355             if (event->event->type == MOUSE_BUTTON)
 356             {
 357                 event->event->mouse_button.x = pos.x;
 358                 event->event->mouse_button.y = pos.y;
 359             }
 360             else if (event->event->type == MOUSE_SCROLL)
 361             {
 362                 event->event->mouse_scroll.x = pos.x;
 363                 event->event->mouse_scroll.y = pos.y;
 364             }
 365         }
 366
 367         [eventsLock unlock];
 368     }
 369
 370     - (BOOL) postHotKeyEvent:(UInt32)hotKeyNumber time:(double)time
 371     {
 372         NSDictionary* hotKeyDict = [hotKeysByMacID objectForKey:[NSNumber numberWithUnsignedInt:hotKeyNumber]];
 373         if (hotKeyDict)
 374         {
 375             macdrv_event* event;
 376
 377             event = macdrv_create_event(HOTKEY_PRESS, nil);
 378             event->hotkey_press.vkey        = [[hotKeyDict objectForKey:WineHotKeyVkeyKey] unsignedIntValue];
 379             event->hotkey_press.mod_flags   = [[hotKeyDict objectForKey:WineHotKeyModFlagsKey] unsignedIntValue];
 380             event->hotkey_press.keycode     = [[hotKeyDict objectForKey:WineHotKeyKeyCodeKey] unsignedIntValue];
 381             event->hotkey_press.time_ms     = [[WineApplicationController sharedController] ticksForEventTime:time];
 382
 383             [self postEvent:event];
 384
 385             macdrv_release_event(event);
 386         }
 387
 388         return hotKeyDict != nil;
 389     }
 390
 391     static OSStatus HotKeyHandler(EventHandlerCallRef nextHandler, EventRef theEvent, void* userData)
 392     {
 393         WineEventQueue* self = userData;
 394         OSStatus status;
 395         EventHotKeyID hotKeyID;
 396
 397         status = GetEventParameter(theEvent, kEventParamDirectObject, typeEventHotKeyID, NULL,
 398                                    sizeof(hotKeyID), NULL, &hotKeyID);
 399         if (status == noErr)
 400         {
 401             if (hotKeyID.signature != WineHotKeySignature ||
 402                 ![self postHotKeyEvent:hotKeyID.id time:GetEventTime(theEvent)])
 403                 status = eventNotHandledErr;
 404         }
 405
 406         return status;
 407     }
 408
 409     - (void) unregisterHotKey:(unsigned int)vkey modFlags:(unsigned int)modFlags
 410     {
 411         NSNumber* vkeyNumber = [NSNumber numberWithUnsignedInt:vkey];
 412         NSNumber* modFlagsNumber = [NSNumber numberWithUnsignedInt:modFlags];
 413         NSArray* winIDPair = [NSArray arrayWithObjects:vkeyNumber, modFlagsNumber, nil];
 414         NSDictionary* hotKeyDict = [hotKeysByWinID objectForKey:winIDPair];
 415         if (hotKeyDict)
 416         {
 417             EventHotKeyRef hotKeyRef = [[hotKeyDict objectForKey:WineHotKeyCarbonRefKey] pointerValue];
 418             NSNumber* macID = [hotKeyDict objectForKey:WineHotKeyMacIDKey];
 419
 420             UnregisterEventHotKey(hotKeyRef);
 421             [hotKeysByMacID removeObjectForKey:macID];
 422             [hotKeysByWinID removeObjectForKey:winIDPair];
 423         }
 424     }
 425
 426     - (int) registerHotKey:(UInt32)keyCode modifiers:(UInt32)modifiers vkey:(unsigned int)vkey modFlags:(unsigned int)modFlags
 427     {
 428         static EventHandlerRef handler;
 429         static UInt32 hotKeyNumber;
 430         OSStatus status;
 431         NSNumber* vkeyNumber;
 432         NSNumber* modFlagsNumber;
 433         NSArray* winIDPair;
 434         EventHotKeyID hotKeyID;
 435         EventHotKeyRef hotKeyRef;
 436         NSNumber* macIDNumber;
 437         NSDictionary* hotKeyDict;
 438
 439         if (!handler)
 440         {
 441             EventTypeSpec eventType = { kEventClassKeyboard, kEventHotKeyPressed };
 442             status = InstallApplicationEventHandler(HotKeyHandler, 1, &eventType, self, &handler);
 443             if (status != noErr)
 444             {
 445                 ERR(@"InstallApplicationEventHandler() failed: %d\n", status);
 446                 handler = NULL;
 447                 return MACDRV_HOTKEY_FAILURE;
 448             }
 449         }
 450
 451         if (!hotKeysByMacID && !(hotKeysByMacID = [[NSMutableDictionary alloc] init]))
 452             return MACDRV_HOTKEY_FAILURE;
 453         if (!hotKeysByWinID && !(hotKeysByWinID = [[NSMutableDictionary alloc] init]))
 454             return MACDRV_HOTKEY_FAILURE;
 455
 456         vkeyNumber = [NSNumber numberWithUnsignedInt:vkey];
 457         modFlagsNumber = [NSNumber numberWithUnsignedInt:modFlags];
 458         winIDPair = [NSArray arrayWithObjects:vkeyNumber, modFlagsNumber, nil];
 459         if ([hotKeysByWinID objectForKey:winIDPair])
 460             return MACDRV_HOTKEY_ALREADY_REGISTERED;
 461
 462         hotKeyID.signature  = WineHotKeySignature;
 463         hotKeyID.id         = hotKeyNumber++;
 464
 465         status = RegisterEventHotKey(keyCode, modifiers, hotKeyID, GetApplicationEventTarget(),
 466                                      kEventHotKeyExclusive, &hotKeyRef);
 467         if (status == eventHotKeyExistsErr)
 468             return MACDRV_HOTKEY_ALREADY_REGISTERED;
 469         if (status != noErr)
 470         {
 471             ERR(@"RegisterEventHotKey() failed: %d\n", status);
 472             return MACDRV_HOTKEY_FAILURE;
 473         }
 474
 475         macIDNumber = [NSNumber numberWithUnsignedInt:hotKeyID.id];
 476         hotKeyDict = [NSDictionary dictionaryWithObjectsAndKeys:
 477                       macIDNumber, WineHotKeyMacIDKey,
 478                       vkeyNumber, WineHotKeyVkeyKey,
 479                       modFlagsNumber, WineHotKeyModFlagsKey,
 480                       [NSNumber numberWithUnsignedInt:keyCode], WineHotKeyKeyCodeKey,
 481                       [NSValue valueWithPointer:hotKeyRef], WineHotKeyCarbonRefKey,
 482                       nil];
 483         [hotKeysByMacID setObject:hotKeyDict forKey:macIDNumber];
 484         [hotKeysByWinID setObject:hotKeyDict forKey:winIDPair];
 485
 486         return MACDRV_HOTKEY_SUCCESS;
 487     }
 488
 489
 490 /***********************************************************************
 491  *              OnMainThread
 492  *
 493  * Run a block on the main thread synchronously.
 494  */
 495 void OnMainThread(dispatch_block_t block)
 496 {
 497     NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
 498     NSMutableDictionary* threadDict = [[NSThread currentThread] threadDictionary];
 499     WineEventQueue* queue = [threadDict objectForKey:WineEventQueueThreadDictionaryKey];
 500     dispatch_semaphore_t semaphore = NULL;
 501     __block BOOL finished;
 502
 503     if (!queue)
 504     {
 505         semaphore = dispatch_semaphore_create(0);
 506         dispatch_retain(semaphore);
 507     }
 508
 509     finished = FALSE;
 510     OnMainThreadAsync(^{
 511         block();
 512         finished = TRUE;
 513         if (queue)
 514             [queue signalEventAvailable];
 515         else
 516         {
 517             dispatch_semaphore_signal(semaphore);
 518             dispatch_release(semaphore);
 519         }
 520     });
 521
 522     if (queue)
 523     {
 524         while (!finished)
 525         {
 526             MacDrvEvent* macDrvEvent;
 527             struct kevent kev;
 528
 529             while (!finished &&
 530                    (macDrvEvent = [queue getEventMatchingMask:event_mask_for_type(QUERY_EVENT)]))
 531             {
 532                 queue->event_handler(macDrvEvent->event);
 533             }
 534
 535             if (!finished)
 536             {
 537                 [pool release];
 538                 pool = [[NSAutoreleasePool alloc] init];
 539
 540                 kevent(queue->kq, NULL, 0, &kev, 1, NULL);
 541             }
 542         }
 543     }
 544     else
 545     {
 546         dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
 547         dispatch_release(semaphore);
 548     }
 549
 550     [pool release];
 551 }
 552
 553
 554 /***********************************************************************
 555  *              macdrv_create_event_queue
 556  *
 557  * Register this thread with the application on the main thread, and set
 558  * up an event queue on which it can deliver events to this thread.
 559  */
 560 macdrv_event_queue macdrv_create_event_queue(macdrv_event_handler handler)
 561 {
 562     NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
 563     NSMutableDictionary* threadDict = [[NSThread currentThread] threadDictionary];
 564
 565     WineEventQueue* queue = [threadDict objectForKey:WineEventQueueThreadDictionaryKey];
 566     if (!queue)
 567     {
 568         queue = [[[WineEventQueue alloc] initWithEventHandler:handler] autorelease];
 569         if (queue)
 570         {
 571             if ([[WineApplicationController sharedController] registerEventQueue:queue])
 572                 [threadDict setObject:queue forKey:WineEventQueueThreadDictionaryKey];
 573             else
 574                 queue = nil;
 575         }
 576     }
 577
 578     [pool release];
 579     return (macdrv_event_queue)queue;
 580 }
 581
 582 /***********************************************************************
 583  *              macdrv_destroy_event_queue
 584  *
 585  * Tell the application that this thread is exiting and destroy the
 586  * associated event queue.
 587  */
 588 void macdrv_destroy_event_queue(macdrv_event_queue queue)
 589 {
 590     NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
 591     WineEventQueue* q = (WineEventQueue*)queue;
 592     NSMutableDictionary* threadDict = [[NSThread currentThread] threadDictionary];
 593
 594     [[WineApplicationController sharedController] unregisterEventQueue:q];
 595     [threadDict removeObjectForKey:WineEventQueueThreadDictionaryKey];
 596
 597     [pool release];
 598 }
 599
 600 /***********************************************************************
 601  *              macdrv_get_event_queue_fd
 602  *
 603  * Get the file descriptor whose readability signals that there are
 604  * events on the event queue.
 605  */
 606 int macdrv_get_event_queue_fd(macdrv_event_queue queue)
 607 {
 608     WineEventQueue* q = (WineEventQueue*)queue;
 609     return q->fds[0];
 610 }
 611
 612 /***********************************************************************
 613  *              macdrv_copy_event_from_queue
 614  *
 615  * Pull an event matching the event mask from the event queue and store
 616  * it in the event record pointed to by the event parameter.  If a
 617  * matching event was found, return non-zero; otherwise, return 0.
 618  *
 619  * The caller is responsible for calling macdrv_release_event on any
 620  * event returned by this function.
 621  */
 622 int macdrv_copy_event_from_queue(macdrv_event_queue queue,
 623         macdrv_event_mask mask, macdrv_event **event)
 624 {
 625     NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
 626     WineEventQueue* q = (WineEventQueue*)queue;
 627
 628     MacDrvEvent* macDrvEvent = [q getEventMatchingMask:mask];
 629     if (macDrvEvent)
 630         *event = macdrv_retain_event(macDrvEvent->event);
 631
 632     [pool release];
 633     return (macDrvEvent != nil);
 634 }
 635
 636 /***********************************************************************
 637  *              macdrv_create_event
 638  */
 639 macdrv_event* macdrv_create_event(int type, WineWindow* window)
 640 {
 641     macdrv_event *event;
 642
 643     event = calloc(1, sizeof(*event));
 644     event->refs = 1;
 645     event->deliver = INT_MAX;
 646     event->type = type;
 647     event->window = (macdrv_window)[window retain];
 648     return event;
 649 }
 650
 651 /***********************************************************************
 652  *              macdrv_retain_event
 653  */
 654 macdrv_event* macdrv_retain_event(macdrv_event *event)
 655 {
 656     OSAtomicIncrement32Barrier(&event->refs);
 657     return event;
 658 }
 659
 660 /***********************************************************************
 661  *              macdrv_release_event
 662  *
 663  * Decrements the reference count of an event.  If the count falls to
 664  * zero, cleans up any resources, such as allocated memory or retained
 665  * objects, held by the event and deallocates it
 666  */
 667 void macdrv_release_event(macdrv_event *event)
 668 {
 669     if (OSAtomicDecrement32Barrier(&event->refs) <= 0)
 670     {
 671         NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
 672
 673         switch (event->type)
 674         {
 675             case IM_SET_TEXT:
 676                 if (event->im_set_text.text)
 677                     CFRelease(event->im_set_text.text);
 678                 break;
 679             case KEYBOARD_CHANGED:
 680                 CFRelease(event->keyboard_changed.uchr);
 681                 CFRelease(event->keyboard_changed.input_source);
 682                 break;
 683             case QUERY_EVENT:
 684             case QUERY_EVENT_NO_PREEMPT_WAIT:
 685                 macdrv_release_query(event->query_event.query);
 686                 break;
 687             case WINDOW_GOT_FOCUS:
 688                 [(NSMutableSet*)event->window_got_focus.tried_windows release];
 689                 break;
 690         }
 691
 692         [(WineWindow*)event->window release];
 693         free(event);
 694
 695         [pool release];
 696     }
 697 }
 698
 699 /***********************************************************************
 700  *              macdrv_create_query
 701  */
 702 macdrv_query* macdrv_create_query(void)
 703 {
 704     macdrv_query *query;
 705
 706     query = calloc(1, sizeof(*query));
 707     query->refs = 1;
 708     return query;
 709 }
 710
 711 /***********************************************************************
 712  *              macdrv_retain_query
 713  */
 714 macdrv_query* macdrv_retain_query(macdrv_query *query)
 715 {
 716     OSAtomicIncrement32Barrier(&query->refs);
 717     return query;
 718 }
 719
 720 /***********************************************************************
 721  *              macdrv_release_query
 722  */
 723 void macdrv_release_query(macdrv_query *query)
 724 {
 725     if (OSAtomicDecrement32Barrier(&query->refs) <= 0)
 726     {
 727         switch (query->type)
 728         {
 729             case QUERY_DRAG_OPERATION:
 730                 if (query->drag_operation.pasteboard)
 731                     CFRelease(query->drag_operation.pasteboard);
 732                 break;
 733             case QUERY_DRAG_DROP:
 734                 if (query->drag_drop.pasteboard)
 735                     CFRelease(query->drag_drop.pasteboard);
 736                 break;
 737             case QUERY_PASTEBOARD_DATA:
 738                 if (query->pasteboard_data.type)
 739                     CFRelease(query->pasteboard_data.type);
 740                 break;
 741         }
 742         [(WineWindow*)query->window release];
 743         free(query);
 744     }
 745 }
 746
 747 /***********************************************************************
 748  *              macdrv_set_query_done
 749  */
 750 void macdrv_set_query_done(macdrv_query *query)
 751 {
 752     macdrv_retain_query(query);
 753
 754     OnMainThreadAsync(^{
 755         NSEvent* event;
 756
 757         query->done = TRUE;
 758         macdrv_release_query(query);
 759
 760         event = [NSEvent otherEventWithType:NSEventTypeApplicationDefined
 761                                    location:NSZeroPoint
 762                               modifierFlags:0
 763                                   timestamp:[[NSProcessInfo processInfo] systemUptime]
 764                                windowNumber:0
 765                                     context:nil
 766                                     subtype:WineApplicationEventWakeQuery
 767                                       data1:0
 768                                       data2:0];
 769         [NSApp postEvent:event atStart:TRUE];
 770     });
 771 }
 772
 773 @end
 774
 775
 776 /***********************************************************************
 777  *              macdrv_register_hot_key
 778  */
 779 int macdrv_register_hot_key(macdrv_event_queue q, unsigned int vkey, unsigned int mod_flags,
 780                             unsigned int keycode, unsigned int modifiers)
 781 {
 782     WineEventQueue* queue = (WineEventQueue*)q;
 783     __block int ret;
 784
 785     OnMainThread(^{
 786         ret = [queue registerHotKey:keycode modifiers:modifiers vkey:vkey modFlags:mod_flags];
 787     });
 788
 789     return ret;
 790 }
 791
 792
 793 /***********************************************************************
 794  *              macdrv_unregister_hot_key
 795  */
 796 void macdrv_unregister_hot_key(macdrv_event_queue q, unsigned int vkey, unsigned int mod_flags)
 797 {
 798     WineEventQueue* queue = (WineEventQueue*)q;
 799
 800     OnMainThreadAsync(^{
 801         [queue unregisterHotKey:vkey modFlags:mod_flags];
 802     });
 803 }