[haiku-bugs] Re: [Haiku] #4260: [ScreenSaver] freezes when switching screensavers
- From: "anevilyak" <trac@xxxxxxxxxxxx>
- Date: Wed, 04 Sep 2013 19:05:56 -0000
#4260: [ScreenSaver] freezes when switching screensavers
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Reporter: diver | Owner: axeld
Type: bug | Status: closed
Priority: normal | Milestone: R1
Component: Preferences/ScreenSaver | Version: R1/Development
Resolution: fixed | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
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Comment (by anevilyak):
That report shows a pretty straightforward reason for the deadlock: the
window thread is in MessageReceived() waiting for the renderer thread to
exit. Being in MessageReceived implies that thread holds the window lock.
Meanwhile, the renderer thread tries to grab the window lock, which it
won't be able to get because of the aforementioned thread state. Without
looking more closely, two possible resolutions immediately come to mind:
a) the window doesn't wait for the renderer thread, and instead the
renderer sends the window a message indicating it's terminated right
before exiting, at which point the window takes the actions it would've
taken after the thread exited,
or b) the renderer thread simply doesn't touch the window directly at all,
and instead sends it messages to ask it to do things on its behalf, so it
never has to do the aforementioned locking at all.
--
Ticket URL: <http://dev.haiku-os.org/ticket/4260#comment:6>
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