winemac: Add a delivery limit to events.

Some events are application-wide, not specific to a thread.  Such an event
needs to be broadcast to all GUI-attached threads because we don't know which
are handling events, but we don't want the event to be processed in each.
Often it should only be processed by the first to pull it from its queue.

dlls/winemac.drv/cocoa_app.m

@@ -413,6 +413,13 @@ - (void) sendDisplaysChanged:(BOOL)activating
         event->displays_changed.activating = activating;
 
         [eventQueuesLock lock];
+
+        // If we're activating, then we just need one of our threads to get the
+        // event, so it can send it directly to the desktop window.  Otherwise,
+        // we need all of the threads to get it because we don't know which owns
+        // the desktop window and only that one will do anything with it.
+        if (activating) event->deliver = 1;
+
         for (queue in eventQueues)
             [queue postEvent:event];
         [eventQueuesLock unlock];

dlls/winemac.drv/cocoa_event.m

@@ -198,7 +198,7 @@ - (MacDrvEvent*) getEventMatchingMask:(macdrv_event_mask)mask
         char buf[512];
         int rc;
         NSUInteger index;
-        MacDrvEvent* event;
+        MacDrvEvent* ret = nil;
 
         /* Clear the pipe which signals there are pending events. */
         do
@@ -217,22 +217,27 @@ - (MacDrvEvent*) getEventMatchingMask:(macdrv_event_mask)mask
         [eventsLock lock];
 
         index = 0;
-        for (event in events)
+        while (index < [events count])
         {
+            MacDrvEvent* event = [events objectAtIndex:index];
             if (event_mask_for_type(event->event->type) & mask)
-                break;
+            {
+                [[event retain] autorelease];
+                [events removeObjectAtIndex:index];
 
-            index++;
-        }
-
-        if (event)
-        {
-            [event retain];
-            [events removeObjectAtIndex:index];
+                if (event->event->deliver == INT_MAX ||
+                    OSAtomicDecrement32Barrier(&event->event->deliver) >= 0)
+                {
+                    ret = event;
+                    break;
+                }
+            }
+            else
+                index++;
         }
 
         [eventsLock unlock];
-        return [event autorelease];
+        return ret;
     }
 
     - (void) discardEventsMatchingMask:(macdrv_event_mask)mask forWindow:(NSWindow*)window
@@ -416,6 +421,7 @@ int macdrv_copy_event_from_queue(macdrv_event_queue queue,
 
     event = calloc(1, sizeof(*event));
     event->refs = 1;
+    event->deliver = INT_MAX;
     event->type = type;
     event->window = (macdrv_window)[window retain];
     return event;

dlls/winemac.drv/macdrv_cocoa.h

@@ -176,6 +176,7 @@ extern int macdrv_set_display_mode(const struct macdrv_display* display,
 
 typedef struct macdrv_event {
     int                 refs;
+    int                 deliver;
     int                 type;
     macdrv_window       window;
     union {