Lockup Problem with Progress Indicator
Lockup Problem with Progress Indicator
- Subject: Lockup Problem with Progress Indicator
- From: Brant Sears <email@hidden>
- Date: Fri, 2 Apr 2004 12:46:27 -0800
I'm having some problems with NSProgressIndicator. I am running into
situations where my progress indicators are locking up and failing to
animate properly. I have a background thread that is performing an operation
and attempting to update a determinate progress bar. I also have an
indeterminate progress indicator running (which is the spinning style).
Sometimes (maybe 50% of the time) these indicators become "stuck". When this
happens, I notice that the heartbea thread seems to be stalled in a wait
state waiting for some semaphore to be released.
It looks like the call is [NSViewHierarchyLock
lockForReadingWithExceptionHandler:] is being called.
My background thread is also calling realoadData on an NSTableView. The
table view is correctly being updated. I am not doing anything special to
try to call reloadData from the maint thread - I just call it from the
background thread. I did try to make sure I at least start and stop the
progress indicators from the main thread.
Any ideas on what I could be doing wrong?
Brant Sears
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