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XQuartz: Avoid a race in initialization of darwinPointer 

http://xquartz.macosforge.org/trac/ticket/579

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>
This commit is contained in:
Jeremy Huddleston 2012-05-17 10:08:02 -07:00
parent c495211373
commit acdc4f54ee
1 changed files with 10 additions and 8 deletions
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18
hw/xquartz/X11Application.m
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@ -1329,6 +1329,11 @@ untrusted_str(NSEvent *e)
}
#endif
extern void
darwinEvents_lock(void);
extern void
darwinEvents_unlock(void);
- (void) sendX11NSEvent:(NSEvent *)e
{
NSPoint location = NSZeroPoint;
@ -1341,18 +1346,15 @@ untrusted_str(NSEvent *e)
int modifierFlags;
BOOL isMouseOrTabletEvent, isTabletEvent;
#ifdef HAVE_LIBDISPATCH
static dispatch_once_t once_pred;
dispatch_once(&once_pred, ^{
tilt = NSZeroPoint;
darwinTabletCurrent = darwinTabletStylus;
});
#else
if (!darwinTabletCurrent) {
/* Ensure that the event system is initialized */
darwinEvents_lock();
darwinEvents_unlock();
assert(darwinTabletStylus);
tilt = NSZeroPoint;
darwinTabletCurrent = darwinTabletStylus;
}
#endif
isMouseOrTabletEvent = [e type] == NSLeftMouseDown ||
[e type] == NSOtherMouseDown ||